• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Drive device with at least one actuator (31) applying a drive torque to a drive shaft (5) that varies with an angular position of the drive shaft (5), and a passive supporting device (33) with a first magnet arrangement (35) and a second magnet arrangement (37) applying a driving torque, and wherein the first magnet arrangement (35) contains at least one first permanent magnet (135, 136) and the second magnet arrangement (37) contains at least one second permanent magnet (137, 138). Assembly group of a weaving machine containing such a drive device, weaving machine containing such a drive device and method for driving a drive shaft (5) in such a weaving machine.
    公开号:BE1026177B1
    申请号:E20190015
    申请日:2019-02-21
    公开日:2020-02-27
    发明作者:Dimitri Coemelck；Emmanuel Delboo；Kristof Roelstraete
    申请人:Picanol Nv；
    IPC主号:
    专利说明:

    Driving device for a weaving machine with a supporting device.
    Technical field and state of the art.
    The invention relates to a driving device for a weaving machine, the driving device comprising a driving shaft with a driving shaft line, at least one actuator which exerts a driving torque on the driving shaft to rotate the driving shaft around the driving shaft line, and a supporting device. The invention further relates to a mounting group of a weaving machine, a weaving machine containing a drive device, and a method for driving a drive shaft in a weaving machine.
    A weaving machine includes various driving devices, for example a weaving frame drive, a gripper drive, a drawer drive, a selvedge drive, and other drives. The drive device comprises, for example, a drive shaft to which components or elements to be driven are coupled. The components or elements are referred to as driven components or driven elements. Several of these driven components are driven to perform non-continuous movements: for example, a drawer unit that is moved back and forth, weaving frames or other shed forming means, which are moved up and down, and grippers that are moved in and out of the weaving compartment.
    In one embodiment, the drive shaft of such a drive device rotates back and forth. This movement is also referred to as oscillation. In other embodiments, the
    BE2019 / 0015 drive shaft rotated through 360 °, in normal operation the drive shaft is rotated continuously or stepwise in one of the two directions of rotation. This movement is also referred to as full rotation, that is, over a full revolution. The drive device includes an actuator that applies a drive torque to the drive shaft for rotating the drive shaft. The actuator is coupled directly or via a gear transmission system to the drive shaft. In one embodiment, different drive devices are provided with a common actuator. In other embodiments, each drive device is provided with a separate actuator. Due to the non-continuous movement, for example reciprocating movement of components driven by a drive shaft of the drive device, a required drive torque varies with an angular position of the drive shaft.
    To produce an oscillation or reciprocating movement of a driven component at a weaving machine, WO 2005/010257 A1 discloses a driving device comprising a driving source, an electromagnetic energy accumulator connected to the driving component and / or to the driving source and which is provided for accumulating potential energy during at least part of the reciprocating movement of the driven component, and a control device for controlling at least the energy accumulator and / or the drive source according to measured and / or predetermined parameters for the movement course of the driven component. The electromagnetic accumulator contains a magnetic pole pair, at least one of the magnetic poles being an electromagnetic pole. The natural frequency of the reciprocating motion depends on the current flowing on it
    BE2019 / 0015 the electromagnetic accumulator and the mass of the driven component are used. In one embodiment, the drive source provides energy only to compensate for friction losses. In other embodiments, the drive source is operated to effect a forced oscillation of the driven component.
    Summary of the invention.
    It is an object of the invention to provide a weaving machine driving device with reduced energy consumption. It is further the object of the invention to provide a mounting group of a weaving machine and a weaving machine containing a drive device, and a method for driving a drive shaft in a weaving machine.
    These objects are solved by the drive device with the features of claim 1, the assembly group of a weaving machine with the features of claim 13, the weaving machine with the features of claim 14 and the method with the features of claim 15. Preferred embodiments are described in defined in the dependent claims. The invention offers the advantage that a passive supporting device, which does not require an energy supply, exerts a supporting driving torque in at least one angular position on the driving shaft, so that the driving torque to be applied by the actuator can have fewer variations. The person skilled in the art can arrange the supporting device in a suitable position, so that thanks to the supporting driving torque provided by the passive supporting device, the total energy consumption is reduced.
    BE2019 / 0015 In a first aspect, a drive device is provided, the drive device comprising a drive shaft with a drive shaft line, at least one actuator applying a drive torque to the drive shaft to rotate the drive shaft about the drive shaft line, a required drive torque having an angular position of the drive shaft, and a passive supporting device having a first magnet arrangement containing at least one first permanent magnet and a second magnet arrangement containing at least one second permanent magnet, the first magnet arrangement and the second magnet arrangement being displaced relative to one another the rotation of the drive shaft, and wherein in at least one angular position of the drive shaft an attractive and / or repelling force between the first magnet arrangement and the second magnet arrangement exerts a supporting drive torque on the drive shaft, the drive torque of the at least one actuator and the supporting drive torque of the supporting device provide a resulting drive torque on the drive shaft.
    In the context of the application, the term passive supporting device defines a device which does not require an external power supply for its operation. In contrast, an actuator requires an external energy supply. The permanent magnet passive supporting device is also referred to as a magnetic spring device. By means of the passive supporting device, a supporting driving torque is provided in at least one angular position. The supporting drive torque can act in the same direction as the drive torque applied by the actuator or in an opposite direction. As a result, the driving torque to be provided by such an angular position in such an angular position is ahead of
    BE2019 / 0015 effecting a desired movement of the drive shaft other than the driving torque to be provided in the absence of the supporting driving torque. For example, the first magnetic arrangement and the second magnetic arrangement are arranged to attract the drive shaft when the drive shaft approaches a first angular position. In embodiments of the invention, this pull will apply torque to the drive shaft in a desired direction of travel of the drive shaft, also referred to as positive torque, when the drive shaft approaches the first angular position. Alternatively or additionally, in embodiments of the invention, this attraction will further exert a torque on the drive shaft opposite to the desired direction of movement of the drive shaft, also referred to as negative torque, when the drive shaft departs from the first angular position. With suitable arrangement and construction of the first magnet arrangement and the second magnet arrangement, positive torque is applied at an angular position that requires a higher drive torque to move the driven component and / or negative torque is applied at an angular position that requires a lower drive torque. required to move the driven component. Consequently, especially in a device with a full-rotation drive shaft, the drive torque to be applied by the actuator may have less variation than in devices without a passive supporting device, which can reduce energy consumption of the actuator and, thus, the drive device. be reduced.
    In the embodiments of the invention, the first magnet arrangement and the second magnet arrangement are designed such that a supporting drive torque is lower in all angular positions
    BE2019 / 0015 than a maximum drive torque required to produce a desired rotation of the drive shaft. For example, the first magnet arrangement and the second magnet arrangement are configured such that a maximum supporting drive torque is less than 40% of the maximum required drive torque, or even less than 20% of the maximum required drive torque. In case the drive shaft is rotated 360 °, depending on the arrangement and construction of the first magnet arrangement and the second magnet arrangement, a speed of the drive shaft may be affected to have less variations compared to drive devices not having a supporting device equipped.
    With the movement of the drive shaft, the first magnet arrangement and the second magnet arrangement are moved relative to each other. In one embodiment, the first magnet arrangement includes at least one first magnetic pole and the second magnet arrangement contains at least one second magnetic pole, which is of opposite polarity to the at least one first magnetic pole, wherein within a range of motion of the drive shaft, the first magnet arrangement and the second magnet arrangement is displaced relative to each other to form at least one stable magnetic equilibrium point, with the at least one actuator moving the first magnet arrangement and the second magnet arrangement relative to each other from the at least one stable magnetic equilibrium point . In the context of the application, a stable magnetic equilibrium point is referred to as a position in which magnetic poles of opposite polarity are approached as far as possible. Thus, when the first magnet arrangement and the second magnet arrangement move relative to each other out of the stable magnetic equilibrium point, the attraction forces act between
    BE2019 / 0015 the magnetic poles of opposite polarity against the movement, this means that the passive supporting device exerts a negative torque. In addition, within the range of motion of the drive shaft, the first magnet arrangement and the second magnet arrangement can be placed relative to each other to form at least one unstable magnetic equilibrium point, in which forces exerted by the passive supporting device are balanced, this means that the supporting drive torque in that position is zero. If, by means of the at least one actuator, the first magnet arrangement and the second magnet arrangement are moved relative to each other from the at least one unstable magnetic equilibrium point immediately after the unstable magnetic equilibrium point is exited, the passive supporting device applies a supporting accelerating drive torque.
    A magnetic flux field generated between the first magnet arrangement and the second magnet arrangement, wherein in preferred embodiments, the first magnet arrangement and the second magnet arrangement are displaced relative to each other in a direction transverse to the generated magnetic flux field .
    In one embodiment, the drive shaft may be drivably connected to at least one driven component to reciprocate the at least one driven component along a path of movement and / or around at least one driven component about an axis along a circumferential path of rotation of the drive shaft to rotate. The driven component is, for example, a weaving frame that is moved up and down with the movement of the drive shaft of the drive device, a gripper
    BE2019 / 0015 moved by a lance, which lance is drivably connected to the drive shaft of the drive device, a reed mounted on a drawer beam or other element of a weaving machine. The path of movement along which the driven components perform a reciprocating movement can be either linear, for example, a reciprocating movement of a gripper or a weaving frame, or along a curved path, for example, the reciprocating movement of a reed. In some embodiments, the driven element is directly connected to the drive shaft. In other embodiments of the invention, the drive shaft may be drivably connected to the at least one driven component via at least one transmission element.
    In one embodiment, in its movement, the at least one driven component and / or at least one transmission element exercises or exerts a reaction torque on the drive shaft, the first magnet arrangement and the second magnet arrangement being arranged such that at least one angular position of the drive shaft, the supporting driving torque exerted by the first magnet arrangement and the second magnet arrangement is opposite to the reaction torque. In other words, in angular positions of the drive shaft, in which the reaction torque causes acceleration of the drive shaft, the passive supporting device is used to brake the drive shaft. In other angular positions, where the reaction torque causes a drive shaft deceleration, the passive supporting device is used to accelerate the drive shaft. This offers the advantage that it allows to limit the variations of the angular velocity of the drive shaft when the drive shaft is rotated through 360 °.
    BE2019 / 0015 In one embodiment, the first magnet arrangement on the drive shaft is arranged to rotate with the drive shaft and the second magnet arrangement is located on the circumference of the drive shaft in a non-rotating position relative to the drive shaft line. In other words, the second magnet arrangement containing at least one second permanent magnet is not rotated with the drive shaft about the drive shaft line, but remains fixed in position relative to the drive shaft line upon rotation of the drive shaft.
    According to the invention, the supporting device is a passive supporting device, in which forces or applied torques depend on the number, size, construction and arrangement of the first magnet arrangement and the second magnet arrangement. In order to adjust a magnitude or strength of forces or applied torques, in one embodiment, the second magnet arrangement is mounted movably relative to the drive shaft along the drive shaft line. As a result, upon movement of the second magnet arrangement, the magnitude or strength of the force or applied torque can be adjusted by the passive supporting device.
    In another embodiment, the first magnet arrangement is arranged on the driven component and / or a transmission element to move with the driven component and / or the transmission, and the second magnet arrangement is in a stationary position along a path of travel of the driven component and / or the transmission element arranged. The first magnet arrangement is arranged, for example, on a weaving frame to move up and down with the weaving frame, and / or on a weaving frame transfer rod to reciprocate with the transfer rod.
    BE2019 / 0015 [0017] The construction, strength and / or arrangement of the first magnet arrangement and the second magnet arrangement is chosen by the skilled person to meet the requirement of the associated device. In one embodiment, at least one of the first magnet arrangement and the second magnet arrangement includes at least two effective magnetic poles. It is generally known to those skilled in the art that permanent magnets are not monopoles. However, permanent magnets can be arranged so only one of the magnetic poles is effective.
    In one embodiment, the first magnet arrangement includes at least two effective magnetic poles, wherein at least two magnetic poles of the first magnet arrangement differ in at least one of a polarity, size, size, and / or gaps between adjacent magnetic poles differ in size. Alternatively or additionally, in one embodiment, the second magnet arrangement includes at least two effective magnetic poles, wherein at least two magnetic poles of the second magnet arrangement differ in at least one of a polarity, size, size, and / or that gaps between adjacent magnetic poles differ in size.
    In one embodiment, the actuator is a pneumatic or hydraulic actuator. In preferred embodiments, the at least one actuator is an electric motor.
    The drive device is selected, for example, from the group comprising at least one weaving frame drive, a gripper drive, a drawer drive, a selvedge drive. The drive device is adapted in one embodiment to two or more driven components that
    BE2019 / 0015 differ in type, for example to drive a gripper and a reed of weaving machine.
    In a second aspect, a mounting group of a weaving machine containing a driving device and a driven component is provided.
    In a third aspect, a weaving machine containing a driving device is provided.
    In a fourth aspect, a method is provided for driving a drive shaft in a weaving machine, wherein a driving torque is applied to the driving shaft by means of at least one actuator to rotate the driving shaft around the driving shaft line, wherein a required driving torque with a angular position of the drive shaft varies, and in at least one angular position of the drive shaft a supporting driving torque is applied to the driving shaft, the driving torque of the at least one actuator and the supporting driving torque of the supporting device providing a resulting driving torque, the supporting driving torque being an attractive and / or repulsive force between a first magnet arrangement containing at least one first permanent magnet and a second magnet arrangement containing at least one second permanent magnet, the first magnet arrangement and the second magnet arrangement relative to are displaced with the rotation of the drive shaft.
    Brief description of the drawings.
    Hereinafter, embodiments of the invention are described in
    BE2019 / 0015 described in detail with reference to the drawings. Throughout the drawings, like elements are designated by like reference numbers.
    Figure 1 shows a driving device, namely a weaving frame drive, of a weaving machine according to an embodiment of the invention;
    Figure 2 shows a detail of the weaving frame drive of Figure 1 with a drive shaft positioned in a first angular position;
    Figure 3 shows the detail of the weaving frame drive of Figure 2 with a drive shaft positioned in a second angular position;
    Figure 4 is a perspective view of a detail of the weaving frame drive of Figure 1 with a drive shaft positioned in a first operating position;
    Figure 5 shows in a perspective view the detail of the weaving frame drive of Figure 4 with a drive shaft positioned in a second operating position;
    Figure 6 shows a drive device, namely a drawer drive, of a weaving machine according to an embodiment of the invention in a first angular position of a drive shaft;
    Figure 7 shows the drawer drive of Figure 6 in a second angular position of the drive shaft;
    Figure 8 shows the drawer drive of Figure 6 in a third angular position of the drive shaft;
    Figure 9 shows a driving device of a weaving machine according to an embodiment of the invention in a first angular position of the driving shaft;
    Figure 10 shows the main drive of Figure 9 in a second angular position of the drive shaft;
    BE2019 / 0015
    Figure 11 shows the drive device of Figure 9 in a perspective view in the first angular position of the drive shaft;
    Figure 12 shows the drive device of Figure 9 in a perspective view in a third angular position of the drive shaft;
    Figure 13 shows a drive device, namely a weaving frame drive, of a weaving machine according to an embodiment of the invention in a first angular position of the drive shaft;
    Figure 14 shows the weaving frame drive of Figure 13 in a second angular position of the drive shaft;
    Figure 15 shows a drive device, namely a weaving frame drive, of a weaving machine according to another embodiment of the invention in a first angular position of the drive shaft;
    Figure 16 shows the weaving frame drive of Figure 15 in a second angular position of the drive shaft;
    Figure 17 shows a driving device, namely a drawer drive, of a weaving machine according to another embodiment of the invention in a first angular position;
    Figure 18 shows the drawer drive of Figure 17 in a second angular position;
    Figure 19 shows a driving device, namely a gripper drive, of a weaving machine according to an embodiment of the invention in a first angular position;
    Figure 20 shows the gripper drive of Figure 19 in a second angular position;
    Figure 21 shows a driving device, namely a weaving frame drive, of a weaving machine according to another embodiment of the invention in a first angular position;
    Figure 22 shows the weaving frame drive of Figure 21 in a second angular position;
    BE2019 / 0015
    Figure 23 shows a driving device, namely a drawer drive, of a weaving machine according to another embodiment of the invention in a first angular position;
    Figure 24 shows the drawer drive of Figure 23 in a second angular position;
    Figure 25 shows a perspective view of a drawer drive similar to the drawer drive of Figure 23 in the second angular position;
    Figure 26 shows a driving device, namely a gripper drive, of a weaving machine according to an embodiment of the invention in a first angular position;
    Figure 27 shows the gripper drive of Figure 26 in a second angular position;
    Figure 28 shows the gripper drive of Figure 26 in a third angular position;
    Figure 29 shows a driving device, namely a gripper drive, of a weaving machine according to an embodiment of the invention in a first angular position of the drive shaft; and
    Figure 30 shows the gripper drive of Figure 29 in a second angular position of the drive shaft.
    Detailed description of embodiments of the invention.
    Figure 1 shows a driving device, namely a weaving frame drive 1, of a weaving machine according to an embodiment of the invention. Figures 2 and 5 show details of the weaving frame drive 1 of Figure 1. Such a weaving frame drive 1 is shown in applicant's WO 2017032556 A1, which is hereby referred to by reference
    BE2019 / 0015 incorporated.
    A first driven component in the form of a weaving frame 3 is coupled to the weaving frame drive 1. The weaving frame drive 1 shown in Figs. 1 to 5 is part of a shed forming device, which includes a number of weaving frame drives 1 and an equal number of weaving frames 3, wherein each weaving frame 3 is driven by an associated weaving frame drive 1.
    The weaving frame drive 1 shown for driving the weaving frame 3 comprises a drive shaft 5 rotating around a drive shaft line 7, a first transmission element in the form of a crank 9 (see Figures 2 and 3) mounted on the drive shaft 5, a second transmission element in the form of a coupling rod 11, and a pivot lever 13. The pivot lever 13 is pivotable about a pivot axis 15 between an upper position and a lower position.
    The weaving frame drive 1 further includes a second pivot lever 17 pivotable about a second pivot axis 18 between an upper position and a lower position. The second pivot lever 17 is connected to the pivot lever 13 by means of a coupling rod-shaped transmission element 19 and driven by the pivot lever 13 to move jointly with the pivot lever 13. The weaving frame 3 is connected to each of the pivot levers 13, 17 by means of a transmission element in the form of a connecting assembly comprising a coupling element 20 and a lifting rod 21. The first pivot lever 13 and the second pivot lever 17 are also transmission elements. The drive shaft 5 and the pivot shaft 15, 18 extend in parallel.
    BE2019 / 0015 The coupling rod 11 of the weaving frame drive 1 is connected to the crank 9 by a first hinge connection 23 (see figures 2 and 3), which first hinge connection 23 is eccentric to the drive shaft line 7. Furthermore, the coupling rod 11 is connected to a connecting element 25 by a second hinge connection 27, which connecting element 25 is attached to the pivot lever 13.
    The drive shaft 5 is rotatably mounted about the drive shaft line 7 in a fixed position in a housing 29. The housing 29 is in use stationary mounted on the weaving machine, for example mounted on a frame (not shown) of the weaving machine. The driving device 1 comprises an actuator 31, which in the shown embodiment forms part of a motor unit 32 (not shown in detail). In the shown embodiment, one actuator 31 is assigned to each weaving frame drive 1 for driving the drive shaft 5 to rotate about the drive shaft line 7. In other embodiments, different weave frame drives share one common actuator. With the rotation of the drive shaft 5, the weaving frame 3 is moved up and down between an upper position and a lower position, and a required driving torque for moving the weaving frame 3 varies with an angular position of the driving shaft 5.
    The weaving frame drive 1 further includes a passive supporting device 33 (see Figures 2 to 5) with a first magnet arrangement 35 and a second magnet arrangement 37. The first magnet arrangement 35 is arranged on the drive shaft 5 to engage with the drive shaft 5 rotate. The first magnet arrangement 35 includes several permanent magnets 135, 136 with four magnetic poles, which are either a magnetic north pole or a magnetic south pole. The practitioner will understand that all magnetic
    BE2019 / 0015 North Poles and Magnetic South Poles can be interchanged without any technical effect. In the figures, opposite poles are indicated by different patterns. The second magnet arrangement 37 is mounted on the housing 29 in a non-rotating or rotationally fixed position relative to the drive shaft 7. The second magnet arrangement 37 also includes several permanent magnets 137, 138 with four magnetic poles, which are either a magnetic north pole or a magnetic south pole.
    In the figures, each permanent magnet 135, 136, 137, 138 is depicted as a hypothetical magnetic monopole. The skilled person knows that every permanent magnet has a magnetic north pole and a magnetic south pole. In one embodiment, each permanent magnet 135, 136, 137, 138 is arranged so that only one of its magnetic poles is effective, therefore each magnet arrangement having four magnetic poles contains four permanent magnets. In other embodiments, both opposing magnetic poles of one permanent magnet 135, 136, 137, 138 are provided to be effective. For example, the four magnetic poles of the first magnet arrangement 35 are provided on two semicircular permanent magnets and / or the four magnetic poles of the second magnet arrangement 37 are provided on two semicircular permanent magnets.
    In use, the drive shaft 5 is driven to rotate about the drive shaft line 7 by the actuator 31 of the motor unit 32, the first magnet arrangement 35 rotating together with the drive shaft 5 about the drive shaft line 7. Thereby, the first magnet arrangement 35 relative to the second magnet arrangement 37 displaced with the rotation of the drive shaft 5.
    BE2019 / 0015
    Upon rotation, attractive and / or repulsive forces between the permanent magnets 135, 136 of the first magnet arrangement 35 and the permanent magnets 137, 138 of the second magnet arrangement 37 exert a variable supporting drive torque on the drive shaft 5, the direction and strength depends on the relative angular position on the drive shaft 5 carrying the first magnet arrangement 35 relative to the second magnet arrangement 37. The driving torque of the actuator 31 of the motor unit 32 and the supporting driving torque of the passive supporting device 33 co-provide a resulting drive torque on the drive shaft 5.
    As best seen in Figures 4 and 5, the second magnet arrangement 37 in the shown embodiment is mounted in a magnet housing 39. In the embodiment shown, the magnet housing 39 is movable relative to the drive shaft 5 along an axial direction of the drive shaft 5 mounted by three rods 41, an additional actuator device 40 being provided around the magnet housing 39 with the second magnet arrangement 37 moving along the axial direction of the driving shaft 5. Thus, by moving the second magnet arrangement 37 along the axial direction of the driving shaft 5, a strength or magnitude of the driving torque exerted by the passive supporting device 33 can be adjusted. The additional actuator device 40 includes, for example, a hydraulic or pneumatic linear actuator (not shown in detail) that includes a piston 44.
    In the shown embodiment of Figures 1 to 5, the first magnet arrangement 35 and the second magnet arrangement 37 each contain two magnetic poles of a first
    BE2019 / 0015 magnetic polarity and two magnetic poles of opposite second magnetic polarity, which are evenly distributed around the circumference, so that each magnetic pole occupies one sector of 90 °.
    In the angular position of the drive shaft 5 shown in Figure 2, the magnetic poles of the first magnetic polarity of the first magnet arrangement 35 are arranged opposite the magnetic poles of the first magnetic polarity of the second magnet arrangement 37 and the magnetic poles of the second magnetic polarity of the first magnet arrangement 35 are disposed opposite the magnetic poles of the second magnetic polarity of the second magnet arrangement 37. In that angular position, repulsive and attractive forces balance each other and that angular position is an unstable magnetic equilibrium point assigned, for example, to a lower position of the weaving frame 3. When applying a driving torque by means of the actuator 31 of the motor unit 32, the driving shaft 5 is driven for example, to rotate counterclockwise, where after the drive shaft 5 has been rotated from the unstable magnetic equilibrium point, the repulsive and attractive forces between the magnetic poles exert a positive supporting drive torque acting counterclockwise on the drive shaft 5, i.e. in the direction of movement of the drive shaft 5. Thus, the torque employed by the actuator 31 to effect that movement can be reduced. After the drive shaft 5 has been rotated through 90 °, a stable magnetic equilibrium point of the passive supporting device 33 is reached as shown in Figure 3. Further driving the drive shaft 5 to rotate counterclockwise by means of the actuator 31 of the motor unit 32, exercise the repulsive and attractive forces
    BE2019 / 0015 emits a negative supporting drive torque between the magnetic poles, this means acting in a direction opposite to the direction of movement of the drive shaft 5 until again after a rotation by 90 ° a further unstable magnetic balance point is reached. As the drive shaft 5 is further driven to rotate counterclockwise by the actuator 31 of the motor unit 32 from the unstable equilibrium point, the repulsive and attractive forces between the magnetic poles again exert a positive supporting drive torque on the drive shaft 5.
    Figures 6 to 8 further show a drive device with a rotating drive shaft 5, using the same reference numbers for the same or similar elements. More specifically, Figures 6 to 8 show a drive device, namely a drawer drive 101 of a weaving machine in a first corner position, a second corner position, and a third corner position of the drive shaft 5, respectively.
    The drawer drive 101 shown in Figures 6 to 8 is used to drive a drawer unit 42 containing a plurality of drawer levers 45 carrying a drawer boom 43 with a reed 48 to rotate back and forth about a drawer lever shaft 47 . For clarification, a fabric 80 and two scissors of warp threads 81, 82 are shown, as well as part of a frame 56 of the weaving machine and a fabric support 54 mounted on the frame 56 of the weaving machine. In that embodiment, a second driven component in the form of a reed 48 is coupled to the drawer drive 101.
    [0039]
    In the embodiment shown, the
    BE2019 / 0015 drawer drive 101 two additional cams 49, 51. The cams 49, 51 are fixedly mounted on the drive shaft 5 to rotate together with the drive shaft 5 about the drive shaft line 7. The drawer drive 101 further comprises a fork element 53 which has two support arms 55 which, together with different drawer levers 45, are fixedly mounted on a drawer shaft 57 to rotate jointly around the drawer lever shaft 47. Rollers 59 are provided at the end of the support arms 55.
    The drawer drive 101 includes an actuator (not shown) for driving the drive shaft 5 to rotate about the drive shaft line 7, causing the drawer levers 45 to rotate with the drawer boom 43 around the drawer lever shaft 47. The actuator is, for example, a main actuator of a weaving machine, in particular a main motor, or an actuator which is added only to the drawer drive 101.
    The drawer drive 101 further includes a first magnet arrangement 35 containing one permanent magnet 136 mounted on the drive shaft 5 to rotate with the drive shaft 5. Furthermore, a second magnet arrangement 37 is provided, comprising two permanent magnets 137, which are arranged in a rotationally fixed position relative to the drive shaft 5, for instance in a magnet housing 39 as shown in figures 4 and 5.
    In the shown embodiment, the effective magnetic poles of the two permanent magnets 137 of the second magnet arrangement 37 have the same magnetic polarity and the opposite polarity of the effective magnetic pole of the permanent magnet 136 of the first magnet arrangement 35. In the embodiment shown is any permanent one
    BE2019 / 0015 magnet 136, 137 arranged in a sector of 60 °, the two permanent magnets 137 of the second magnet arrangement 37 being moved through a sector of 60 °.
    In the angular position of the drive shaft 5 shown in Figure 6, the permanent magnet 136 of the first magnet arrangement 35 is disposed in the sector between the two permanent magnets 137 of the second magnet arrangement 37. The two effective magnetic poles of the permanent magnets 137 of the second magnet arrangement 37 cause at least substantially identical pull forces and the position shown in Figure 6 is an unstable equilibrium point. For example, the embodiment has been added to the stop position of the drawer levers 45. When rotating the drive shaft 5 to thereby rotate the drawer unit 42 clockwise in the view of the drawing, the magnetic pole of the permanent magnets 137 of the second magnet arrangement 37, to which the permanent magnet 136 of the first magnet arrangement 35 has been rotated, produces an attraction which produces a positive supporting driving force on the driving shaft 5 in the direction of movement of the driving shaft 5 until the stable equilibrium point shown in figure 7 is reached , in which stable equilibrium point the magnetic pole of the permanent magnet 136 of the first magnet arrangement 35 is arranged opposite the magnetic pole of one of the permanent magnets 137 of the second magnet arrangement 37. By applying a driving torque by means of an actuator (not shown) on the drive shaft 5, the drive shaft 5 is driven further about the drawer unit 42 thereby rotating clockwise against the attractive forces between the magnetic poles 136, 137, which exert a negative supporting drive torque acting against the direction of movement of the drive shaft 5 until again after a
    BE2019 / 0015 rotation of about 180 ° from the initial position, a further unstable magnetic equilibrium point is reached as shown in figure 8.
    Figures 9 to 12 further show two drive devices, namely a tray drive 201 and a gripper drive 301 with a common rotating drive shaft 5, using the same reference numbers for the same or similar elements. More specifically, Figures 9 to 12 show a drawer drive 201 of a weaving machine for moving a reed 48 and Figures 11 and 12 also show a gripper drive 301 of a weaving machine for moving a lance. The drawer drive 201 and the gripper drive 301 are driven simultaneously by rotating the common drive shaft 5.
    The two drive devices of Figures 9 to 12 include a common actuator (not shown) for driving the drive shaft 5 to rotate about the drive shaft line 7, whereby, as shown in Figures 9 and 10, the drawer unit 42 with the reed 48 rotates back and forth about a drawer lever shaft 47, and, as shown in Figs. 11 and 12, a lance unit 61 to move a gripper in and out of a weaving compartment. The drawer unit 42 includes two additional cams 49, 51 fixedly mounted on the shaft 50 which rotates about an axis 52 and is driven by the drive shaft 5. A drawer unit 42 for moving a reed 48 is known from EP 0726345 A1 of the applicant, which is hereby incorporated by reference. A lance unit 61 for moving a gripper is known from DE 10346227 A1 of the applications, which is hereby incorporated by reference.
    The driving device 201 for moving the reed
    BE2019 / 0015 includes a first magnet set 202 and the lance moving drive 301 includes a second magnet set 203, with each set 202, 203 containing a first magnet arrangement 35 and a second magnet arrangement 37.
    The first magnet set 202 is shown in Figures 9 and 10 and has a first magnet arrangement 35 containing a first permanent magnet 135 with a first effective magnetic pole mounted on the drive shaft 5 to rotate with the drive shaft 5, and a second magnet arrangement 37 containing two second permanent magnets 137 which form two effective magnetic poles arranged in a rotationally fixed position relative to the drive shaft line 7.
    In the embodiment shown, the two magnetic poles of the second permanent magnets 138 of the second magnet arrangement 37 have the same magnetic polarity and the opposite polarity of the magnetic pole of the first permanent magnet 135 of the first magnet arrangement 35, the magnetic poles can be either magnetic south poles or magnetic north poles. In the embodiment shown, each magnetic pole is arranged in a sector of 30 °, the two magnetic poles of the second permanent magnets 138 of the second magnet arrangement 37 being displaced by a sector of 30 °.
    In the angular position of the drive shaft 5 shown in Figure 9, the first permanent magnet 135 of the first magnet arrangement 35 is disposed in the sector between the two permanent magnets 138 of the second magnet arrangement 37. The two magnetic poles of the second permanent magnets 138 of
    BE2019 / 0015 the second magnet arrangement 37 cause at least substantially identical attractive forces and the position shown in figure 9 is an unstable equilibrium point. For example, the embodiment has been added to the stop position of the drawer unit 42. When the drive shaft 5 is rotated counterclockwise, the second permanent magnets 138 of the second magnet arrangement 37, toward which the first permanent magnet 135 of the first magnet arrangement is 35 rotated, produces an attraction that produces a positive supporting driving force on the drive shaft 5 acting in the direction of movement until the stable equilibrium point is reached, wherein the first permanent magnet 135 of the first magnet arrangement 35 is disposed opposite one of the second permanent magnets 138 of the the second magnet arrangement 37. By applying a driving torque through the actuator to the driving shaft 5, the driving shaft 5 is driven to rotate counterclockwise against the attractive forces between the permanent magnets 135, 138, which exert a negative supporting driving torque against the direction of movement of d The drive shaft 5 acts until again after a rotation by 180 ° from the stop position, an otherwise unstable magnetic equilibrium point is reached.
    The second magnet set 203 of the gripper drive 301 for moving the lance (not shown) by means of a lance unit 61 is shown in Figures 11 and 12. The lance unit 61 contains a disk 63, which is driven to rotate about the axis 52 by the drive shaft 5. A toothed gear is provided on the outside of the disc 63, which rotates about a gear shaft 72 via a gear 71 which is mounted around a gear shaft 72 by a gear 73 mounted on the drive shaft 5. A pivot element 65 is mounted with respect to the disk 63 in order to rotate it
    BE2019 / 0015 to swing the disc 63 back and forth about a pivot shaft 67. As described in detail in DE 10346227 A1, a toothed gear segment can be provided on an outer side of the pivot element 65 which drives a wheel, which wheel is used to drive a lance. The disc 63 drives a pivot element 65 through an arrangement 62 coupled to the disc 63 via a shaft 64 and a shaft support 66. The pivot element 65 can pivot around a pivot axis 68. A similar arrangement is shown in DE 10346227 A1.
    The second magnet set 203 as shown in Figures 11 and 12 has a first magnet arrangement 35 containing four first permanent magnets 135, 136 which form four effective magnetic poles, which first magnet arrangement 35 is mounted on the drive shaft 5 to to rotate drive shaft 5, and a second magnet arrangement 37 containing four second permanent magnets 137, 138 which form four effective magnetic poles disposed in a non-rotating or rotationally fixed position relative to the drive shaft 5.
    The first magnet set 202 assists the actuator in decelerating the drawer unit 42 when it arrives at its front dead center or its rear dead center, which are unstable magnetic equilibrium points. The first magnet set 202 further assists the actuator in accelerating the drawer unit 42 as it begins to move out of the front or rear dead center.
    The second magnet set 203 assists the actuator in decelerating the lance when it arrives at its front dead center or its rear dead center, which unstable magnetic
    BE2019 / 0015 are balance points. The second magnet set 203 further assists the actuator in accelerating the lance as it begins to move out of the front or rear dead center.
    In an alternative embodiment, the first magnet set 202 and the second magnet set 203 are combined into one magnet set.
    In each of the above-described embodiments with reference to Figures 1 to 12, the drive device 1, 101, 201, 301 includes a drive shaft 5 having a first magnet arrangement 35, the drive shaft 5 having the first magnet arrangement 35 is arranged and driven to rotate through 360 °, also referred to as driven to rotate. The second magnet arrangement 37 is arranged in a non-rotating position along the periphery of the drive shaft 5. A magnetic flux field is produced in an opening between the rotating first magnet arrangement 35 and the non-rotating stationary second magnet arrangement 37, in particular a magnetic flux field in a radial direction of the drive shaft 5. The first magnet arrangement 35 moves transversely on the magnetic flux field. Within the range of motion of the drive shaft 5, that is, within one full rotation or 360 ° rotation of the drive shaft 5, the first magnet arrangement 35 and the second magnet arrangement 37 form at least one stable magnetic equilibrium point.
    Hereinafter, embodiments of the invention are described with reference to Figures 13 to 20, showing drive devices, namely a weaving frame drive 401, 501 of a weaving machine, a drawer drive 601 of a weaving machine, and a gripper drive 701 of a weaving machine
    BE2019 / 0015 comprising a drive shaft 5, which is arranged and driven to rotate through 360 °. A first magnet arrangement 35 of these driving devices is arranged on a driven component, which is driven by the driving shaft 5 and which performs a reciprocating movement with the rotation of the driving shaft 5. The second magnet arrangement 37 is arranged in a stationary position along a path of movement of the component carrying the first magnet arrangement.
    Figures 13 and 14 show a weaving frame drive 401 of a weaving machine similar to the weaving frame drive 1 shown in Figures 1 to 5. The same reference numerals are used for the same or similar elements.
    As described above, a weaving frame 3 is coupled to the weaving frame drive 401. For driving the weaving frame 3 to move up and down, the weaving frame drive 401 includes a drive shaft 5 which rotates about a drive shaft line 7, a first transmission element in the form of a crank 9 mounted on the drive shaft 5, a second transmission element in the form of a coupling rod 11, and a pivot lever 13. The pivot lever 13 is pivotable about a pivot axis 15 between an upper position and a lower position.
    The weaving frame drive 401 further includes a second pivot lever 17 pivotable about a second pivot axis 18 between an upper position and a lower position. The second pivot lever 17 is connected to the pivot lever 13 by a coupling rod 19 and driven by the pivot lever 13 to move jointly with the pivot lever 13. The weaving frame 3 is on the pivoting levers 13, 17
    BE2019 / 0015 mounted by means of a connection assembly containing coupling elements 20 and lifting rods 21.
    The weaving frame drive 401 includes a passive supporting device 33 having a first magnet arrangement 35 and a second magnet arrangement 37. The first magnet arrangement 35 is mounted on the coupling rod 19 to reciprocate with the coupling rod 19 along a linear path. . The second magnet arrangement 37 is mounted in position, for example, on a frame 156 (only schematically indicated) of the weaving machine. The first magnet arrangement 35 includes three first permanent magnets 136 that have the same magnetic polarity. The second magnet arrangement 37 includes three second permanent magnets 137 having the same magnetic polarity, the magnetic polarity of the second permanent magnets 137 being opposite to that of the first permanent magnets 136. The first magnet arrangement 35 is transverse to the coupling rod 19. a magnetic flux field generated between the moving first magnet arrangement 35 and the stationary second magnet arrangement 37 is moved.
    In the angular position of the drive shaft 5 shown in Figure 13, the first magnet arrangement 35 is moved to the left relative to the second magnet arrangement 37, and the passive supporting device applies a force to the coupling rod 19 moving the coupling rod 19 to the right in the figure, this means in an intended direction of movement of the coupling rod 19. As a result, the attractive forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a positive supporting driving torque, and the torque applied by the actuator 31 can be reduced .
    BE2019 / 0015 After the drive shaft 5 has been rotated through 90 °, a stable magnetic equilibrium point of the passive supporting device 33 is reached as shown in figure 14, the first magnet arrangement 35 being placed directly opposite the second magnet arrangement 37. As the drive shaft 5 is further driven to rotate counterclockwise by an actuator (not shown in Figures 13 and 14), the forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a negative supporting drive torque which the direction of movement of the drive shaft 5 acts.
    Within the range of motion of the drive shaft, that is, within one revolution of the drive shaft 5, the first magnet arrangement 35 and the second magnet arrangement 37 form at least one stable magnetic equilibrium point.
    Figures 15 and 16 show a weaving frame drive 501 of a weaving machine similar to the weaving frame drive 401 shown in Figures 13 and 14. For the same or similar elements, the same reference numbers are used, and for a detailed description of these elements reference is made to the above description.
    The weaving frame drive 501 also includes a passive supporting device 33 with a first magnet arrangement 35 and a second magnet arrangement 37. Unlike the embodiment shown in Figures 13 and 14, the first magnet arrangement 35 is mounted on the pivot lever 13 to with the pivot lever 13 to oscillate back and forth about the pivot shaft 15. The second magnet arrangement 37 is mounted in a non-rotating position relative to the pivot axis 15, for example in a
    BE2019 / 0015 magnet housing 39 as shown in figures 4 and 5, or on a frame (not shown) of the weaving machine. In the shown embodiment, the first magnet arrangement 35 includes two first permanent magnets 135, 136 of opposite magnetic polarity. The second magnet arrangement 37 also includes two second permanent magnets 137, 138 of opposite magnetic polarity. The two first permanent magnets 135, 136 and / or the two second permanent magnets 137, 138 are integrally formed as one semicircular element in one embodiment.
    In the angular position of the drive shaft 5 shown in Figure 15, the first magnet arrangement 35 and the second magnet arrangement 37 form a stable magnetic equilibrium point. When driving the drive shaft 5 to rotate by means of an actuator (not shown in Figures 15 and 16), the swing lever 13 is turned clockwise in the view of the drawing from the stable magnetic equilibrium point to the position shown in Figure 16 rotated, and the forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a negative supporting drive torque acting against the direction of movement of the pivot lever 13 and, thus, a movement of the drive shaft 5.
    Figures 17 and 18 show a drawer drive 601, similar to the drawer drive 101 shown in Figures 6 to 8. The same reference numbers are used for the same or similar elements. The drawer drive 601 is used to drive a drawer unit 42 with a reed 48 to swing back and forth about a drawer lever shaft 47. To achieve this goal, the drawer unit 42 is driven by the
    BE2019 / 0015 drive shaft 5 (see figures 6 to 8, not shown in figures 17 and 18) around the drawer lever shaft 47.
    The drawer drive 601 includes a passive supporting device 33 with a first magnet arrangement 35 and a second magnet arrangement 37. The first magnet arrangement 35 is mounted on the drawer unit 42 to reciprocate with the drawer unit 42 around the drawer lever. shaft 47 to oscillate. The second magnet arrangement 37 is mounted in a non-rotating position relative to the drawer lever shaft 47, for example in a magnet housing 39 as shown in figures 4 and 5. In the embodiment shown, the first magnet arrangement 35 contains two first permanent magnets 135, 136 of opposite magnetic polarity. The second magnet arrangement 37 also includes two second permanent magnets 137, 138 of opposite magnetic polarity. In one embodiment, the two first permanent magnets 135, 136 and / or the two second permanent magnets 137, 138 are integrally formed as one semicircular element.
    In the position shown in Figure 17, the first magnet arrangement 35 and the second magnet arrangement 37 are displaced from a stable magnetic equilibrium point. When driving the drive shaft 5 further to thereby rotate the drawer unit 42 clockwise by means of an actuator (not shown in Figures 17 and 18), the forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a positive supporting driving torque acting in the direction of movement of the drawer unit 42 until the stable magnetic equilibrium point is reached. When the first magnet arrangement 35 moves past the stable magnetic equilibrium point by means of an actuator
    BE2019 / 0015 moved as shown in Figure 18, the forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a negative supporting drive torque acting against the direction of movement of the drawer unit 42.
    Figures 19 and 20 show a driving device, namely a gripper drive 701 for moving a lance (not shown) by means of a lance unit 61 as shown and described in Figures 11 and 12. The lance unit 61 includes a disk 63, the drive shaft 5 (not shown in Figures 19, 20) being drivably coupled to the disk 63 to rotate the disk 63. A pivot element 65 is mounted relative to the disk 63 to pivot about a pivot axis 67 with the rotation of the disk 63.
    The gripper drive 701 includes a passive supporting device 33 with a first magnet arrangement 35 and a second magnet arrangement 37. The first magnet arrangement 35 is mounted on the pivot element 65 to oscillate with the pivot element 65 back and forth about the pivot axis 67 . The second magnet arrangement 37 is mounted in a non-rotating position relative to the pivot axis 67, for example in a magnet housing 39 as shown in Figures 4 and 5. In the embodiment shown, the first magnet arrangement 35 includes two first permanent magnets 135, 136 of opposite magnetic polarity. The second magnet arrangement 37 also includes two second permanent magnets 137, 138 of opposite magnetic polarity. The two first permanent magnets 135, 136 and / or the two second permanent magnets 137, 138 are integrally formed as one semicircular element in one embodiment.
    BE2019 / 0015 In the position shown in Figure 19, the first magnet arrangement 35 and the second magnet arrangement 37 are displaced from a stable magnetic equilibrium point. When driving the drive shaft 5 further to rotate pivot element 65 clockwise by means of an actuator (not shown in Figures 19 and 20), the forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a positive supporting drive torque acting in the desired direction of movement of the pivot member 65 until the stable magnetic equilibrium point shown in Figure 20 is reached. When the first magnet arrangement 35 is moved clockwise past the stable magnetic balance point shown in Figure 20 or counterclockwise out of the stable magnetic balance point shown in Figure 20 by an actuator, the forces between the first magnet arrangement 35 and the second magnet magnet arrangement 37 produce a negative supporting driving torque acting against the direction of movement of the pivot element 65.
    Hereinafter, embodiments of the invention will be described with reference to Figs. 21 to 27, showing drive devices, namely a weaving frame drive 801, a drawer drive 901, and a gripper drive 1001 containing a drive shaft 5 arranged and driven to oscillate, this means to rotate back and forth.
    Figures 21 and 22 show a weaving frame drive 801 of a weaving machine similar to the weaving frame drive 1 shown in Figures 1 to 5. For the same or similar elements, the same reference numbers are used, and for a detailed description of these elements reference is made to the above description . A drive shaft 5 of the
    BE2019 / 0015 weaving frame drive 801 is provided coaxially on the pivot shaft 15 of the first pivot lever 13. The drive shaft 5 is driven by an actuator 31 (not shown in detail) to rotate back and forth about the drive shaft line 7, which coincides with the pivot shaft 15. The actuator 31 is designed, for example, as a steerable motor.
    The weaving frame driver 801 also includes a passive supporting device 33 with a first magnet arrangement 35 and a second magnet arrangement 37. Unlike the embodiment shown in Figures 15 and 16, the first magnet arrangement 35 is mounted on the second pivot lever 17 to oscillate with the pivot lever 17 back and forth about the pivot axis 18. The second magnet arrangement 37 is mounted in a non-rotating position relative to the pivot axis 18, for example, in a magnet housing 39 as shown in Figures 4 and 5, or on a frame (not shown) of the weaving machine. In the shown embodiment, the first magnet arrangement 35 includes two first permanent magnets 135, 136 of opposite magnetic polarity. The second magnet arrangement 37 also includes two second permanent magnets 137, 138 of opposite magnetic polarity. The two first permanent magnets 135, 136 and / or the two second permanent magnets 137, 138 are integrally formed as one semicircular element in one embodiment. When the pivot lever 17 with the first magnet arrangement 35 is moved by an actuator to the stable magnetic equilibrium point shown in Figure 22, the forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a positive supporting drive torque that acts in the direction of movement of the swivel lever 17.
    BE2019 / 0015 Figures 23 to 25 show a drawer drive 901 for driving a drawer unit 42 with a reed 48 to swing back and forth around a drawer lever shaft 47. To achieve this goal, a drive shaft 5 is coupled drivably to the drawer unit 42, in particular is made in one piece with the drawer shaft 57.
    The drawer drive 901 includes an actuator 31 coupled with a drive shaft 5 for rotating the drive shaft 5 back and forth about the drive shaft line 7 to cause the drawer boom 43 to reciprocate with the reed 48, which drive shaft line 7 coincides with the drawer lever shaft 47. The drawer drive 901 further includes a passive supporting device 33 with a first magnet arrangement 35 and a second magnet arrangement 37. The first magnet arrangement 35 is mounted on the drawer unit 42, in particular on the drawer shaft 57 of the drawer unit 42, to oscillate with the drawer unit 42 back and forth about the drawer lever shaft 47. The second magnet arrangement 37 is mounted in a non-rotating position relative to the drawer lever shaft 47, for example in a magnet housing 39 as shown in figures 4 and 5. In the embodiment shown, the first magnet arrangement 35 contains two first permanent magnets 135, 136 with opposite magnetic polarity. The second magnet arrangement 37 also includes two second permanent magnets 137, 138 of opposite magnetic polarity. The two first permanent magnets 135, 136 and / or the two second permanent magnets 137, 138 are integrally formed as one semicircular element in one embodiment.
    BE2019 / 0015 The driving torque of the actuator 31 and the supporting driving torque of the supporting device 33 provide a resulting driving torque on the driving shaft 5 shown in figure 25, in particular on the driving shaft 57 coupled to the driving shaft 5, the supporting device 33 providing either a positive supporting driving torque or a negative supporting driving torque selected such that the driving torque to be supplied by the at least one actuator 31 may be more constant compared to devices not equipped with a supporting device 33. In the position shown in Figure 23, the first magnet arrangement 35 and the second magnet arrangement 37 are displaced from a stable magnetic equilibrium point. When driving the drive shaft 5 to rotate clockwise with the first magnet arrangement 35 by means of the actuator 31, the forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a positive supporting drive torque that acts in the desired direction of movement of the drive shaft 5 until the shown stable magnetic equilibrium point is reached. When the drive shaft 5 with the first magnet arrangement 35 is moved clockwise past the stable magnetic equilibrium point in the position shown in Figure 24 by means of an actuator 31, the forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a negative supporting driving torque acting against the direction of movement of the driving shaft 5. This allows the supported driving torque to cause a deceleration of the driving shaft 5 even when a constant driving torque is applied by the actuator 31. After the dead end of the movement of the drawer unit 42 is reached, the direction of the drive torque applied by the actuator 31 is reversed about the drive shaft 5 counterclockwise
    BE2019 / 0015. The supporting driving device 33 provides a positive supporting driving torque that acts in the direction of movement of the driving shaft 5 until the stable equilibrium point is reached. During a further counterclockwise movement past the stable equilibrium point, the forces between the first magnet arrangement 35 and the second magnet arrangement 37 exert a negative assisting driving torque acting against the direction of movement of the driving shaft 5.
    In an alternative of Figures 23 to 25, the polarity of all the first permanent magnets 135, 136 and the second magnets 137, 138 of the drawer drive 901 can be changed.
    Figures 26 to 28 show a driving device, namely a gripper drive 1001 for moving a lance (not shown) with a gripper (not shown) by means of a wheel 69. In this embodiment, a third driven component, e.g. coupled to the gripper drive 1001 in the form of a wheel 69. The gripper drive 1001 includes a drive shaft 5, which is driven to rotate back and forth about a drive shaft line 7 by means of an actuator 31. The drive shaft 5 is drivable on a pivot element 65 coupled to pivot element 65 back and forth about a pivot shaft 67. rotating with the reciprocating rotation of the drive shaft 5, wherein in the shown embodiment the pivot shaft 67 coincides with the drive shaft line 7. On an outer side of the pivot element 65, a toothed gear segment 75 is provided, which drives a wheel 69 via a gear 76, which gear 76 is mounted on the wheel 69 via a gear shaft 77.
    The gripper drive 1001 further includes a passive
    BE2019 / 0015 supporting device 33 with a first magnet arrangement 35 and a second magnet arrangement 37. The first magnet arrangement 35 is mounted on the pivot element 65 to oscillate with the pivot element 65 about the pivot axis 67. The second magnet arrangement 37 is mounted in a non-rotating position relative to the pivot axis 67, for example in a magnet housing 39 as shown in Figures 4 and 5. In the embodiment shown, the first magnet arrangement 35 includes two first permanent magnets 135, 136 with opposite magnetic polarity. The second magnet arrangement 37 also includes two second permanent magnets 137, 138 of opposite magnetic polarity. The two first permanent magnets 135, 136 and / or the two second permanent magnets 137, 138 are integrally formed as one semicircular element in one embodiment.
    Figures 29 and 30 further show a driving device, namely a gripper drive 1101 for moving a lance (not shown) by means of a wheel 69, using the same reference numbers as in the embodiment of Figures 26 for the same or similar elements to 28. The second magnet arrangement 37 is mounted in a magnet housing 79. The magnet housing 79 is mounted in a frame (not shown) of the weaving machine, so that the magnet housing 79 can rotate about the pivot axis 7, 67. In this way, the second magnet arrangement 37 can be rotated about the pivot axis 7, 67 by rotating the magnet housing 79. This allows adjustment of the angular position of the second magnet arrangement 37 by adjusting the angular position of the magnet housing 79 relative to a frame (not shown) of the weaving machine. Furthermore, an adjustment device 74 is provided for rotating the magnet housing 79
    BE2019 / 0015 and to be fixed in relation to the frame (not shown) of the weaving machine. In one example, the adjustment device 74 includes a screw element 84, one end of which is rotatably mounted in an axial position relative to a projection 78 of the housing 79. Furthermore, a projection 85 is fixedly mounted on the frame (not shown) of the weaving machine. protrusion 85 contains a screw hole. By rotating the screw element 84 in the screw hole of a projection 85, the angular position of the housing 79 with the second magnet arrangement 37 can be adjusted. Two possible angular positions of the housing 79 are shown in Figure 29 and Figure 30, respectively. Furthermore, a nut element 86 can be provided for mounting the screw element 84 relative to the projection 85, and thus also the position of the housing 79 with the projection 78 relative to the frame (not shown) of the weaving machine. This arrangement allows to adjust the angular position of a stable magnetic equilibrium point of the passive supporting device 33.
    In the embodiments shown in Figures 1 to 14 and 21 to 30, the first magnet arrangement 35 on the drive shaft 5 is arranged to move with the drive shaft 5. In alternative embodiments, the supporting device is arranged on a separate shaft of a supporting device, a transmission, in particular a gear transmission, being arranged between the supporting device and the drive shaft 5 driven by the actuator 31. Such an embodiment is particularly advantageous for the embodiments shown in Figures 21 to 30, wherein an amplitude of the oscillating movement of the shaft of the supporting device can be selected to be greater or less than an amplitude of the oscillating movement of the drive shaft 5.
    BE2019 / 0015 It will be clear to the skilled person that the above-described embodiments are only examples of embodiments. Different modifications are conceivable, for example by combining different passive devices and / or by combining passive devices with other actuator arrangements.
    权利要求:
    Claims (15)
    [1]
    Conclusions.
    Drive device comprising a drive shaft (5) with a drive shaft line (7), at least one actuator (31) applying a drive torque to the drive shaft (5) to rotate the drive shaft (5) about the drive shaft line (7), a required drive torque with an angular position of the drive shaft (5) varies, and a supporting device (33) with a first magnet arrangement (35) and a second magnet arrangement (37), the first magnet arrangement (35) and the second magnet arrangement ( 37) are displaced relative to each other with the rotation of the drive shaft (5), and in at least one angular position of the drive shaft (5) an attractive and / or repelling force between the first magnet arrangement (35) and the second magnet arrangement (37) exerts a supporting drive torque on the drive shaft (5), the driving torque of the at least one actuator (31) and the supporting driving torque of the supporting device (33) resulting in a driving torque o Provided on the drive shaft (5), characterized in that the supporting device (33) is a passive supporting device, the first magnet arrangement (35) containing at least one first permanent magnet (135, 136) and the second magnet arrangement (37) contains at least one second permanent magnet (137, 138).
    [2]
    Drive device according to claim 1, characterized in that the first magnet arrangement (35) contains at least one first magnetic pole and the second magnet arrangement (37) contains at least one second magnetic pole, which is of opposite polarity to the at least one first magnetic pole , within a range of motion of the drive shaft (5), the first magnet arrangement (35) and the second magnet arrangement
    BE2019 / 0015 (37) are moved relative to each other to form at least one stable magnetic equilibrium point, the first magnet arrangement (35) and the second magnet arrangement (37) being moved relative to each other by means of the at least one actuator from the at least one stable magnetic equilibrium point.
    [3]
    Drive device according to claim 1 or 2, characterized in that a magnetic flux field is generated between the first magnet arrangement (35) and the second magnet arrangement (37), the first magnet arrangement (35) and the second magnet arrangement (37 ) are displaced relative to each other in a direction transverse to the generated magnetic flux field.
    [4]
    Drive device according to claim 1, 2 or 3, characterized in that the drive shaft (5) can be connected to at least one driven component (3) in a drivable manner to reciprocate at least one driven component (3) along a path of movement and / or to rotate at least one driven component (3) about an axis along a circumferential movement path upon rotation of the drive shaft (5), in particular the drive shaft (5) may be connected to the at least one driven component (3) via at least one drive transmission element (9, 11, 13, 17, 19, 21).
    [5]
    Drive device according to claim 4, characterized in that during its movement, the at least one driven component (3, 48, 69) and / or the at least one transmission element (9, 11, 13, 17, 19, 21) reacts to the drive shaft (5), the first magnet arrangement (35) and the second magnet arrangement (37) being arranged such that at least one angular position of the drive shaft (5) the supporting drive torque
    BE2019 / 0015 applied by the first magnet arrangement (35) and the second magnet arrangement (37) is opposite to the reaction torque.
    [6]
    Drive device according to any one of claims 1 to 5, characterized in that the first magnet arrangement (35) is arranged on the drive shaft (5) to rotate with the drive shaft (5) and the second magnet arrangement (37) is arranged on the circumference of the drive shaft (5) in a non-rotating position relative to the drive shaft line (7).
    [7]
    Drive device according to claim 6, characterized in that the second magnet arrangement (37) is mounted movably relative to the drive shaft (5) along the drive shaft line (7).
    [8]
    Drive device according to claim 4 or 5, characterized in that the first magnet arrangement (35) is arranged on the driven component (3,48,69) and / or a transmission element (9, 11, 13, 17, 19, 21) to move with the driven component and / or the transmission element (9, 11, 13, 17, 19, 21), and the second magnet arrangement (37) in a stationary position along a path of movement of the driven component (3) and / whether the transmission element (9, 11, 13, 17, 19, 21) is arranged.
    [9]
    Drive device according to any one of claims 1 to 8, characterized in that the first magnet arrangement (35) contains at least two effective magnetic poles, in particular at least two magnetic poles of the first magnet arrangement (35) differing in at least one of a polarity, a size, a size, and / or that gaps between adjacent magnetic poles differ in size.
    BE2019 / 0015
    [10]
    Drive device according to any one of claims 1 to 9, characterized in that the second magnet arrangement (37) contains at least two effective magnetic poles, in particular at least two magnetic poles of the second magnet arrangement (37) differing in at least one of a polarity, a size, a size, and / or that gaps between adjacent magnetic poles differ in size.
    [11]
    Drive device according to any one of claims 1 to 10, characterized in that the at least one actuator (31) is an electric motor.
    [12]
    Drive device according to any one of claims 1 to 11, wherein the drive device (1, 101, 201, 301, 401, 501, 601, 701, 801, 901, 1001, 1101) is selected from the group comprising at least one weave frame drive, a gripper drive, a drawer drive, a selvedge drive.
    [13]
    A weaving machine assembly group comprising a drive device according to any one of claims 1 to 12 and a driven component (3, 48, 69) connected to the drive shaft (5) of the drive device.
    [14]
    Weaving machine comprising a drive device according to any one of claims 1 to 12.
    [15]
    Method for driving a drive shaft (5) in a weaving machine, wherein a driving torque is applied to the drive shaft (5) by means of at least one actuator (31) to rotate the drive shaft (5) around the drive shaft line (7) , a required drive torque having an angular position of the drive shaft (5)
    BE2019 / 0015 varies, and in which at least one angular position of the drive shaft (5) a supporting driving torque is exerted on the driving shaft (5), the driving torque of the at least one actuator (31) and the supporting driving torque of the supporting device ( 33) provide a resulting drive torque, the supporting drive torque being applied by an attractive and / or repulsive force between a first magnet arrangement (35) containing at least one first permanent magnet (135, 136) and a second magnet arrangement 10 (37) at least one second permanent magnet (137, 138), the first magnet arrangement (35) and the second magnet arrangement (37) being displaced relative to each other with the rotation of the drive shaft (5).
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    同族专利:
    公开号 | 公开日
    CN112105767A|2020-12-18|
    EP3781735A1|2021-02-24|
    WO2019201433A1|2019-10-24|
    BE1026177A1|2019-10-28|
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    法律状态:
    2020-04-09| FG| Patent granted|Effective date: 20200227 |
    优先权:
    申请号 | 申请日 | 专利标题
    PCT/EP2018/059815|WO2019201433A1|2018-04-18|2018-04-18|Driving device for a weaving machine with assisting device|
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