• 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:
    Clamping device for clamping a pull-in nipple (7), comprising a clamping element (11) which can be inserted from a drive motor (9) via a screw gear (13) between an open position in which the pull-in nipple (7) can be inserted into a receiving opening (8) of the clamping device it can be pulled out, and a clamping position in which the pull-in nipple (7) inserted in the receiving opening (8) is held therein, the clamping device being a pulse unit (12) with a rotor (31) of the drive motor (9) has a mechanically coupled rotating part (40), from which, for the axial adjustment of the tensioning element (11) via the helical gear (13), at least once a rotary pulse per revolution can be transmitted to a pulse receiving part (41) of the pulse unit (12).
    公开号:AT521254A4
    申请号:T20/2019
    申请日:2019-01-17
    公开日:2019-12-15
    发明作者:Dipl Ing Msc (Fh) Remo Egger
    申请人:Cutpack Com Gmbh；
    IPC主号:
    专利说明:

    Summary
    Clamping device for clamping a pull-in nipple (7), comprising a clamping element (11) which can be inserted from a drive motor (9) via a screw gear (13) between an open position in which the pull-in nipple (7) can be inserted into a receiving opening (8) of the clamping device can be pulled out, and a clamping position in which the retractable nipple (7) inserted in the receiving opening (8) is held therein, the clamping device being a pulse unit (12) with a rotor (31) of the drive motor (9) has a mechanically coupled rotating part (40), from which, for the axial adjustment of the clamping element (11) via the helical gear (13), at least once a rotary pulse can be transmitted to a pulse receiving part (41) of the pulse unit (12) per revolution. (Fig. 3) / 33
    T +43 (0) 5522 73 137
    F +43 (0) 5522 73 137-10
    M office@vpat.at
    I www.vpat.at
    patent attorneys
    Hofmann & Fechner
    • Df. Salf + defmann · · ·· ·· ·· ···· ··· Dr. Thomas Fechner
    Hörnlingerstr. 3, P.O.Box 5 6830 Rankweil, Austria
    29327/33 / ss
    20190107
    The invention relates to a tensioning device for clamping a retractable nipple, comprising a tensioning element which is driven by a drive motor via a helical gear between an open position in which the retractable nipple can be inserted into and removed from a receiving opening of the tensioning device and a tensioning position in which the in the receiving opening inserted nipple is held in this, is axially adjustable.
    Clamping devices, also referred to as clamping systems, are used to fix a workpiece in order to machine it at a processing station and / or to transfer it from one processing station to the next. In the case of a zero point clamping device, the position of the workpiece is defined in relation to three axes. Clamping devices in which only one fixation is made with respect to an axis (“Z fixation”) are known.
    In a conventional embodiment, the workpiece or a carrier carrying the workpiece, usually referred to as a pallet, has at least one retractable nipple which is held in a receiving opening of the clamping device in the closed state of the clamping device. For this purpose, the retractable nipple has at least one annular groove, into which engaging elements, for example clamping balls, engage when the clamping device is closed. If high clamping forces are required, hydraulic motors usually have to be used.
    A tensioning device of the type mentioned at the outset is apparent from WO 2014/044390 A1. In a clamping position of a clamping element, clamping balls are pressed into the annular groove of the pull-in nipple inserted into the receiving opening and the clamping device is thus closed. To open the clamping device, the clamping element is moved axially from the clamping position to an open position, in / 33 ······· · · ·· ·· ·· ···· ··· ·· which disengages the clamping balls from the Can get ring groove. The axial adjustment of the clamping element between the clamping position and the open position takes place by means of a drive motor via a screw gear. The helical gear has a fixed outer part with an internal thread, which is formed by a housing part of the clamping device. The internal thread of this outer part engages the external thread of an inner part of the screw gear, which in turn is connected to the tensioning element. The rotating inner part of the screw gear is driven by the drive motor via a double-stage planetary gear. This planetary gear must therefore be designed to be height-adjustable with the rotatable inner part of the screw gear. Overall, this leads to a complicated structure. In view of the static and sliding friction that occurs, torque and speed control of the drive motor is required. The cycle time that can be achieved for a complete clamping and loosening process is relatively long. The ratio of the applied clamping power to the introduced driving power of the drive motor is relatively low.
    The object of the invention is to provide an advantageous clamping device of the type mentioned at the outset, which enables a high clamping force. According to the invention, this is achieved by means of a tensioning device with the features of claim 1.
    The tensioning device according to the invention has a pulse unit which has a rotating part mechanically coupled to the rotor of the drive motor. At least once, an angular momentum can be transmitted from the rotating part to a momentum-receiving part of the pulse unit, as a result of which the axial adjustment of the tensioning element takes place via the screw gear. In an advantageous embodiment of the invention, the rotating part is arranged in a receiving space of the pulse receiving part. The pulse receiving part can advantageously be directly the rotatable part of the screw mechanism, that is to say have a thread, preferably an external thread, which with the thread, preferably an internal thread, of a non-rotatable part of the screw mechanism in / 33
    Intervention stands. The non-rotatable part of the screw mechanism can also be axially immovable, so that the pulse receiving part is axially adjusted when rotating about the longitudinal central axis of the pulse unit. The non-rotatable and axially immovable part of the screw gear is preferably a housing part of the clamping device. However, it would also be conceivable and possible that the rotatable part of the screw transmission is a separate part which is mechanically coupled to the pulse receiving part.
    The angular momentum transmission to the pulse receiving part of the pulse unit is therefore not continuous but intermittent. In other words, the continuously driven rotating part of the pulse unit intermittently exerts a torque on the pulse receiving part. Torque is therefore exerted on the pulse receiving part at least once per revolution of the rotating part over a range of the angle of rotation of the rotating part that is less than 90 °, while no torque is exerted on the pulse receiving part over a remaining range of the rotating angle of the rotating part.
    The angular momentum transmission can take place mechanically via two abutting surfaces. In a preferred embodiment of the invention, however, the angular momentum transmission takes place hydraulically.
    Such pulse units are conventionally used in pulse screwdrivers or impact screwdrivers. Impulse wrenches with hydraulic angular momentum transmission can be found, for example, in EP 1 502 707 A2, DE 10 2007 045 695 A1 and EP 1 920 887 A1. DE 43 43 582 A1 discloses a pulse hammer mechanism, in particular for a pulse screwdriver, with angular momentum transmission from the rotating part to the pulse receiving part taking place mechanically. The pulse receiving part here has a reciprocating piston which can be displaced radially in an oil bath against the force of a return spring and against which the rotating part starts.
    A very high / 33
    Tension are applied. To apply a high clamping force, a hydraulic motor as the drive motor is not necessarily required here, but such can also be achieved with an electrical drive motor.
    In an advantageous embodiment of the invention, the rotor of the drive motor is axially immovably connected to the rotating part of the pulse unit and is axially displaceable relative to the stator of the drive motor. This enables simple yet robust training. In particular, the drive motor can be an electric external rotor motor. Such a device can preferably be brushless. The rotor can advantageously have permanent magnets. These preferably have a greater axial extent than the coils of the stator. This makes it possible for portions of the permanent magnets to lie opposite one another over the full axial extent of the coils of the stator, specifically in different axial positions of the rotor.
    The connection of the rotating part of the pulse unit to the rotor of the drive motor is preferably carried out directly via a drive shaft driven by the rotor of the drive motor. This can, for example, be integrally formed on the rotating part of the impulse unit or be rigidly attached to it and received in an opening of the rotor. A shaping or fastening of the drive shaft to the rotor and reception in an opening of the rotating part is also conceivable and possible. The drive shaft has a cross-sectional shape that differs from the circular shape, and the opening that receives the drive shaft has a corresponding cross-sectional shape.
    The tensioning device advantageously has a sensor for detecting the axial position of the rotating part of the pulse unit. In particular, a limit switch can be provided for this purpose, which can be actuated by a part connected to the drive shaft driving the rotary part or also by the end of the drive shaft itself.
    Further advantages and details of the invention are explained below with reference to the / 33 accompanying drawing. In this show:
    Figures 1 and 2 are a plan view and a side view of a clamping device according to an embodiment of the invention with a retractable nipple inserted into the receiving opening, in the open state of the clamping device, that is, in the open position of the clamping element.
    3 shows a section along the line AA of FIG. 1.
    4 shows a section analogous to FIG. 3, but in an intermediate position of the tensioning element;
    5 shows a section analogous to FIG. 3, but in the closed state of the tensioning device, that is to say in the tensioned position of the tensioning element;
    6 shows a section analogous to FIG. 3, but without the retractable nipple and in an end position of the tensioning element;
    Fig. 7 is a section along the line BB of Fig. 2;
    8 is a sectional exploded view;
    9 shows a section corresponding to FIG. 5 for a somewhat modified embodiment;
    10 shows a section corresponding to FIG. 6 of a further exemplary embodiment of the invention;
    11 shows a section along the line CC of FIG. 10.
    The figures have different scales.
    An embodiment of a tensioning device according to the invention is shown in FIGS. 1 to 8, partially simplified.
    The tensioning device has a housing which is formed by a plurality of housing parts, in the exemplary embodiment of four housing parts 1-4, which are connected to one another by screws 5, 6.
    A pull-in nipple 7 can be inserted through an opening in the housing part 1 into a receiving opening 8 of the clamping device and can be clamped therein, as will be explained below.
    / 33
    The housing part 1 can be fastened to another machine part by means of a screw flange 1a.
    An electric drive motor 9, which includes a stator 30 and a rotor 31 rotatable about the longitudinal central axis 35 of the drive motor 9, is used to close and open the tensioning device. The drive motor 9 is controlled by an electronic control unit 10. A circuit board held in the housing part 4 and equipped with electronic components is indicated schematically.
    In the exemplary embodiment, the drive motor is designed in the form of a brushless external rotor motor, the rotor 31 being equipped with permanent magnets 32. The stator 30 is formed integrally with the housing part 3. For this purpose, the outer jacket of the housing part 3 is connected via a connecting web to a cylindrical inner part which carries the coils 33 of the stator 30.
    The drive motor 9 is used for the axial adjustment of a tensioning element 11 between an open position in which the tensioning device is open, cf. Fig. 3, and a clamping position in which the clamping device is closed and the retractable nipple is clamped in the receiving opening 8, see. Fig. 5. The axial adjustment of the clamping element 11 takes place via a pulse unit 12 and a screw gear 13.
    The pulse unit 12 has a rotating part 40 which can be rotated about a longitudinal center axis 49 of the pulse unit 12 and which is mechanically coupled to the rotor 31 of the drive motor 9. The rotating part 40 is thus continuously rotated about the longitudinal central axis 49 when the rotor 31 of the drive motor 9 rotates, the longitudinal central axis 49 of the pulse unit 12 and the longitudinal central axis 35 of the drive motor 9 lying on a common straight line in the exemplary embodiment, as is preferred.
    In the exemplary embodiment, the mechanical connection between the rotor 31 of the drive motor 9 and the rotating part 40 of the pulse unit 12 takes place directly via a / 33
    Drive shaft 14, which is integrally formed on the rotating part 40. In one section, the drive shaft 14 has a contour that deviates from the circular shape and projects with this section into an opening 34 of the rotor 31 that has a corresponding contour. The section of the drive shaft 14 that protrudes from the rotor 31 on the other side of the opening 34 has one External thread. A nut 15 with an integrally formed trigger pin 16 for a limit switch 17 is screwed onto this.
    The pulse unit 12 also has a pulse receiving part 41, which is also rotatable about the longitudinal central axis 49. This pulse receiving part 41 has a sealed receiving space 42 in which the rotating part 40 is received. Incidentally, the receiving space 42 is filled with a hydraulic fluid not shown separately in the figures.
    In the exemplary embodiment, the pulse receiving part 41 comprises a cup-shaped base part 41a and a cover 41b. The base of the base part 41a has an opening through which the drive shaft 14 is sealed off by means of a seal 43. The cover 41b is also sealed off from the base part 41a by means of a seal 44. In the area of the opening of the base of the base part 41a and in a recess in the cover 41b there are furthermore ball bearings 45, 46 by means of which the rotary part 40 is rotatably mounted. The ball bearing 45 surrounds the drive shaft 14, the ball bearing 46 surrounds a peg-shaped extension of the rotating part 40. A retaining ring 47 screwed to the bottom serves to hold the ball bearing 45 in the bottom of the base part 41a.
    The pulse receiving part 41 could also be of modified design. Thus, a pot-shaped part could be provided, which forms the jacket and the cover of the pulse receiving part and which is closed by a separate base, which is sealed off from the pot-shaped part and which has the opening for the drive shaft 14 to pass through.
    As is known from impulse screwdrivers, the receiving space 42 is in / 33
    Cross-section seen (Fig. 7) not limited to a circle but extends somewhat longitudinally in one direction (oval) with respect to the circular shape. The turned part has a circular outer contour. There is therefore a gap of different widths between the rotating part 40 and the pulse receiving part 41 over the circumference of the rotating part 40, cf. 7 the gap has its smallest width at two opposite points of the pulse receiving part and the gap has its greatest width at two positions spaced 90 ° apart, cf. Fig. 7. At two opposite points of the rotating part 40, the gap between the rotating part 40 and the pulse receiving part 41 is bridged by a sealing element 48, i.e. the rotating part 40 is at least largely sealed at these opposite points from the wall of the pulse receiving part 41 delimiting the receiving space 42. The sealing elements 48 can be formed, for example, by cylindrical bodies which are arranged in grooves in the casing of the rotating part 40. By rotating the rotating part 40, these cylindrical bodies are pressed against the wall of the pulse receiving part 41.
    In addition, 40 channels 50, 51 are arranged in the rotating part, which serve to transmit the hydraulic fluid between the gap spaces sealed by the sealing elements 48. These channels 50, 51 are indicated in FIG. 7 by dashed lines and run at different heights in the rotating part 40. The channel 50 runs between the grooves in which the sealing elements 48 are arranged. The channel 51 runs at right angles to this. The channels 50, 51 are through an axially extending connecting channel 52, cf. e.g. Fig. 3 connected to each other. The connecting channel is closed here by a preferably spherical closure body 54 acted upon by a spring 53. If a threshold value of the pressure of the hydraulic fluid in the channel 50 is exceeded, the hydraulic fluid can flow into the channel 51 while the closure body 54 is raised. The torque applied depends on the preload of the spring 53. The bias of the spring can be made adjustable by means of an adjusting screw. Instead of a closure body 54 acted upon by a spring 53, it could also be provided, for example, to design the connecting channel 52 with a correspondingly small flow cross section / 33, so that it acts as a throttle.
    During the rotation of the rotating part 40, the hydraulic fluid located in the gap between the rotating part 40 and the pulse receiving part 41 is thus pressurized when the respective sealing element 48 reaches the end of the oval bulged region of the pulse receiving part 41, at least after a threshold value of the pressure has been exceeded Hydraulic fluid can flow through a gap between the sealing element 48 and the rotating part 40 into the channel 50 and further via the connecting channel 51 into the channel 51 and from there into one of the non-pressurized gap spaces between the rotating part 40 and the pulse receiving part 41.
    When the rotating part 40 is rotated by the drive motor 9 in order to adjust the tensioning element 11, torque is exerted twice from the rotating part 40 to the pulse receiving part 41 with each rotation of the rotating part 40 in the exemplary embodiment, and this results in a transmission of angular momentum from the rotating part 40 on the pulse receiving part 41.
    For example, it would also be possible to provide only one sealing element arranged on the rotating part for sealing the gap between the rotating part 40 and the pulse receiving part 41, so that there is only one transmission of angular momentum per revolution, or more than two such sealing elements could be provided, so that it occurs per revolution there is a corresponding number of angular momentum transmissions.
    Due to the repeated transmission of angular momentum to the pulse receiving part 41, the latter is rotated about the longitudinal central axis 49 of the pulse unit 12 in order to adjust the clamping element 11 between the open position and the clamping position. The rotary movement of the pulse receiving part 41 is converted by the screw mechanism 13 into an axial movement, i.e. into a movement parallel to the longitudinal center axis of the screw mechanism 13, the longitudinal center axis of the screw mechanism 13 coinciding with the longitudinal center axis 49 of the pulse unit 12/33 (on a common straight line) lies). In the exemplary embodiment, the pulse receiving part 41 itself is provided with an external thread 60 which interacts with an internal thread 61 of the housing part 13. The internal thread 61 of the housing part 13 guides the rotation of the pulse receiving part 41 about the longitudinal central axis 49. Thus, the internal thread 61 also holds the rotating part 40 concentrically to the longitudinal central axis 49 of the pulse unit 12. In the exemplary embodiment, the rotor 31 also becomes concentric with the longitudinal central axis 35 of the drive motor 9 held, although other training is possible.
    For example, the housing part 13 having the internal thread 61 can be made of bronze in order to form good sliding properties with respect to the steel pulse pick-up part 41.
    In the exemplary embodiment, the part of the screw mechanism 13 set in rotation is at the same time the part displaced axially (= parallel to the longitudinal central axis 49) by the rotary movement.
    As already mentioned, the rotating part 40 of the pulse unit 12 is axially immovable (with respect to the longitudinal central axis 49 of the pulse unit 12 or the longitudinal central axis 35 of the drive motor 9) with the rotor 31 of the drive motor 9. With an axial adjustment of the pulse receiving part 41, the rotor 31 thus moves in relation to the stator 30 in the axial direction (= parallel to the longitudinal central axis 35). So that in all axial positions of the rotor 31 relative to the stator 30, sections of the permanent magnets 32 of the rotor 31 are axially opposite the coils 33 of the stator 30, the permanent magnets 32 have a greater axial extension than the coils 33, cf. Fig. 3-6.
    The opening and closing of the tensioning device takes place due to the axial movement of the pulse receiving part 41 caused by the screw gear 13. For this purpose, the pulse receiving part 41 is axially immovably connected to the tensioning element 11. In the exemplary embodiment, two half rings 18, 19 are provided for this purpose, each of which has two axially spaced, projecting webs 20. Of the / 33
    Web 20 of a respective half ring 18, 19 engages in a groove 21 on the outside of the base part 41a of the pulse receiving part 41 and the other in a groove 22 on the outside of the tensioning element 11. Modified training courses are conceivable and possible. For example, a one-piece design of the pulse receiving part 41 with the tensioning element 11 would also be conceivable and possible.
    To close the tensioning device, a tensioning ring 23 is pulled against tensioning balls 24 by tensioning element 11, which is designed as a pulling sleeve in the exemplary embodiment. The clamping ring 23 is thus axially displaced by the clamping element 11 in the direction of the clamping balls 24. The clamping ring 23 has an inclined surface 23a which interacts with the clamping balls 24. When the clamping ring 23 is pulled with the inclined surface 23a against the clamping balls 24, the clamping balls 24 are pressed radially inwards into an annular groove 7a of the retractable nipple 7. The clamping balls 24 thus form engagement elements which cooperate with the annular groove 7a of the pull-in nipple 7 in order to fix the pull-in nipple 7 in the receiving opening 8.
    The clamping balls 24 rest on a support disc 25 arranged between the clamping balls 24 and the pulse receiving part 41. A spring 26 is arranged between the support plate 25 and the pulse receiving part 41, which exerts a prestressing force acting on the support plate 25 in the direction of the clamping balls 24. The spring 26 is designed here in the manner of a plate spring.
    The spring 26 is supported on the cover 41b of the pulse receiving part 41.
    An opening ring 27 is also arranged on the side of the tensioning balls 24 facing away from the drive motor 9. This extends over an end section facing the clamping balls 24 radially inside the clamping ring 23. The opening ring 27 cooperates with the clamping balls 24 radially within the point at which they have their greatest extent in relation to the axial direction of the clamping device.
    / 33
    In the opened state of the clamping device, the opening ring 27 is pressed against the inside of the housing part 1 in the area surrounding the opening in the housing part 1, namely by the force of the spring 26, which acts on the opening ring 27 via the washer 25 and the clamping balls 24. There may be a slight gap between the washer 25 and the cover 41b. The clamping balls 24 are thereby pressed radially outward by the opening ring 27, that is, out of the annular groove 7a of the pull-in nipple 7, cf. 3. In this position, the retractable nipple 7 can be inserted into the receiving opening 8 through the opening in the housing part 1 and pulled out of it, namely parallel to the longitudinal central axis 28 of the receiving opening 8. The longitudinal central axis 28 of the receiving opening 8 lies with the longitudinal central axis 49 the pulse unit 12 on a common straight line, as is preferred.
    In order to clamp the retractable nipple 7 in the receiving opening, the retracting nipple 7 is first inserted into the receiving opening 8 in the open position of the tensioning element 11 until it rests on the support disk 25, as shown in FIG. 3.
    As a result, the tensioning element 11 is axially adjusted by means of the drive motor 9 via the pulse unit 12 and the screw gear 13 from the open position in the direction of the tensioning position (= shifted parallel to the longitudinal central axis 28 of the receiving opening 8).
    An intermediate position is shown in FIG. 4. When moving the clamping element 11 starting from its open position in the direction of its clamping position, the clamping ring 23 is pulled against the clamping balls 24. Since the clamping balls 24 are simultaneously pulled away from the opening in the housing part 1, the contact force acting on the opening ring 27 on the housing part 1 is eliminated and the latter can be lifted off the housing part 1. Due to the inclined surface 23a of the clamping ring 23, the clamping balls 24 are pressed inwards, into the annular groove 7a of the pull-in nipple 7. The distance between the clamping ring 23 and the washer 25 is reduced a little in this case, so that the washer / 33 also slightly extends from the cover 41b can take off, cf. Fig. 4. Fig. 4 shows the position of the clamping element 11, in which the clamping balls 24 are pressed into the annular groove 7a and rest on the lower (= away from the opening in the housing part 1) edge of the annular groove 7a. When the tensioning element 11 is further adjusted in the direction of the tensioning position, the retractable nipple 7 is thus carried along and axially adjusted by the tensioning balls 24, whereby it is drawn further into the receiving opening 8. The closed state of the tensioning device is shown in FIG. 5, in which the tensioning element 11 is in the tensioned position. The retractable nipple 7 has been drawn into the receiving opening 8 just enough that the step surface 7b, which is at right angles to the longitudinal central axis 28 of the receiving opening 8 and in which the retracting nipple 7 has a gradation of its diameter to a smaller diameter, is flush with that which is also perpendicular to the longitudinal central axis 28 the receiving opening 8 lying outer surface of the housing part 1. The retractable nipple 7 is attached to a workpiece to be machined or a carrier for a workpiece to be machined (= workpiece pallet). This workpiece or this carrier is not shown in the figures, but lies on the step surface 7b and extends outward from it. The further retraction of the retractable nipple 7 is thus blocked in the tensioned position of the tensioning element 11 shown in FIG. 5 by the surface of the workpiece or carrier, which bears against the outside of the housing part 1, for a workpiece to which the retractable nipple 7 is fastened. The retractable nipple 7 is thus held in a defined position with a high clamping force with respect to the axial direction of the clamping device (= direction of the longitudinal central axis 28 of the receiving opening 8, also referred to as the z-direction).
    In the closed state of the clamping device, there is a tight fit, preferably a press fit, between the pull-in nipple 7 and the opening in the housing part 1, so that the position of the pull-in nipple 7 also with respect to two mutually perpendicular directions, which are perpendicular to the axial direction of the clamping device, is defined. In this way, a zero point clamping device (= zero point clamping system) is realized.
    / 33
    The opening ring TI also serves to prevent the clamping balls 24 from falling radially inward when the clamping element 11 is moved from the open position into the clamping position and beyond without an inserted insertion nipple 7. For this purpose, the opening ring 27 has a radially outwardly projecting annular projection 27a, which is provided for cooperation with a shoulder 23b of the clamping ring 23. In the open position of the tensioning element 11, the shoulder 23b of the tensioning ring 23 is raised from the projection 27a of the opening ring TI, cf. Fig. 3. When the clamping element 11 is moved in the direction of its clamping position, the projection 27a of the opening ring 27 comes into contact with the shoulder 23b of the clamping ring 23. As a result, the opening ring TI is carried along by the clamping ring 23, cf. 4 and 5. In this position, the distance between the opening ring 27 and the support plate 25 is still somewhat smaller than the diameter of the clamping balls 24.
    6 shows the state of the tensioning device, in which the tensioning element 11 has moved beyond the tensioned position into its end position opposite to the open position, namely without a retractable nipple 7 inserted into the receiving opening 8. This end position is predetermined by the response of the limit switch 17. Approaching this end position serves as a reference run for the control of the tensioning device by the control unit 10.
    Seals 62, 63 are arranged on both sides of the threads 60, 61 of the screw gear 13 in order to prevent dirt from penetrating into the screw gear.
    Fig. 9 shows a modification of the embodiment shown in Figs. 1 to 8 in that the retractable nipple 7 has a margin with respect to the orientation perpendicular to the axial direction, i.e. is somewhat adjustable in the x and y direction. For this purpose, it is sufficient to make the opening in the housing part 1 correspondingly larger than the diameter of the retractable nipple 7. Depending on the position of the retractable nipple at right angles to the axial direction, the unit can include the clamping ring 23, / 33
    Move the opening ring 27, the clamping balls 24 and the support plate 25, possibly also the spring 26, relative to the clamping element 11 and the pulse receiving part in the direction perpendicular to the axial direction (offset o).
    Another embodiment is shown in FIGS. 10 and 11. Apart from the changes described below, the design corresponds to that of the first exemplary embodiment and the description of the first exemplary embodiment can be used accordingly. In this exemplary embodiment, the drive motor 9 is designed as a pneumatic motor. The rotor 31 is axially immovable. The drive shaft 14 is connected to the rotor 31 in a rotationally fixed but axially displaceable manner.
    Different modifications of the exemplary embodiments shown are conceivable and possible without leaving the scope of the invention. For example, the screw gear could be designed in a different way. A separate gear part of the screw gear, which is connected to the pulse receiving part in a rotationally locking manner, and which has one of the threads of the screw gear could also be provided. This gear part or also the pulse receiving part 41 provided with the external thread 60 could also be held axially immovably and the other gear part of the screw gear could be axially displaceable, whereby it could be held by the housing non-rotatably and could be guided axially displaceably.
    It would also be conceivable and possible, in the embodiment shown in FIGS. 1 to 8, to design the rotor 31 to be axially immovable and to provide an axially displaceable connection between the rotor 31 and the rotating part 40 of the pulse unit 12.
    Instead of receiving the rotary part 40 in a receiving space 42 of the pulse receiving part 41, the pulse receiving part 41 could also be arranged in a sealed receiving space of the rotary part 40. The sealing elements 48 between the rotating part 40 and the pulse receiving part 41 could also be designed in a different way, for example lamellar.
    The tensioning mechanism actuated by the axially adjustable tensioning element 11 could also be designed in a different way, for example other engagement elements could also be provided instead of tensioning balls.
    / 33
    Legend for the reference numbers:
    1 housing part 27 opening ring 1a screw flange 27a head Start 2 housing part 28 Longitudinal central axis 3 housing part 30 stator 4 housing part 31 rotor 5 screw 32 permanent magnet 6 screw 33 Kitchen sink 7 Retractable nipple 34 opening 7a ring groove 35 Longitudinal central axis 7b step surface 40 turned part 8th receiving opening 41 Pulse receiving part 9 drive motor 41a base 10 control unit 41b cover 11 clamping element 42 accommodation space 12 pulse unit 43 poetry 13 helical 44 poetry 14 drive shaft 45 ball-bearing 15 mother 46 ball-bearing 16 release pin 47 retaining ring 17 limit switch 48 sealing element 18 half ring 49 Longitudinal central axis 19 half ring 50 channel 20 web 51 channel 21 groove 52 connecting channel 22 groove 53 feather 23 clamping ring 54 Closure body 23a sloping surface 60 external thread 23b shoulder 61 inner thread 24 span ball 62 poetry 25 bearing plate 63 poetry 26 feather
    / 33
    patent attorneys
    Hofmann S <
    DrPRalf flifmaM ···· * Dr. Thomas Fechner Hörnlingerstr. 3, P.O.Box 5 6830 Rankweil, Austria
    Fechner ’“ Τ + 43 (0) 5522 73 137 F +43 (0) 5522 73 137-10 Μ office@vpat.at 1 www.vpat.at 29327/33 / ss 20190107
    权利要求:
    Claims (10)
    [1]
    claims
    1. Clamping device for clamping a pull-in nipple (7), comprising a clamping element (11) which is driven by a drive motor (9) via a helical gear (13) between an open position in which the pull-in nipple (7) into a receiving opening (8) of the clamping device is insertable and extractable, and a clamping position in which the retractable nipple (7) inserted in the receiving opening (8) is held therein, characterized in that the clamping device has a pulse unit (12) with a rotor (31) of the drive motor (9) has a mechanically coupled rotating part (40), from which, for the axial adjustment of the tensioning element (11) via the helical gear (13), at least once a rotary pulse per revolution can be transmitted to a pulse receiving part (41) of the pulse unit (12) is.
    [2]
    2. Clamping device according to claim 1, characterized in that to form the screw mechanism (13), the pulse receiving part (41) has an external thread (60), which with the internal thread (51) of a non-rotatable part, preferably a housing part (2), the Clamping device is engaged.
    [3]
    3. Clamping device according to claim 1 or 2, characterized in that the clamping element (11) with the pulse receiving part (41) is axially non-displaceably connected.
    [4]
    4. Clamping device according to one of claims 1 to 3, characterized in that the rotor (31) of the drive motor (9) with the rotating part (40) of the pulse unit (12) is axially immovably connected and with respect to the stator (30) of the drive motor ( 9) is axially displaceable.
    19/33, **, · · · ·· «··· ·: 19 :: ·’ ···
    [5]
    5. Clamping device according to one of claims 1 to 4, characterized in that with the rotating part (40) of the pulse unit (12) rigidly connected or on the rotating part (40) integrally formed drive shaft (14) or an axially non-displaceably connected part with one Interacts sensor for detecting the axial position of the rotating part (40).
    [6]
    6. Clamping device according to one of claims 1 to 5, characterized in that the drive motor (9) is a brushless motor, preferably an external rotor motor, the rotor (31) having permanent magnets (32) and the permanent magnets (32) having a greater axial extent than the coils (33) of the stator (30).
    [7]
    7. Clamping device according to one of claims 1 to 6, characterized in that the pulse receiving part (41) has a sealed receiving space (42) in which the rotating part (40) is arranged and in which a hydraulic fluid is received, one of the rotor ( 31) of the drive motor (9) driven, the rotating part (40) driving drive shaft (14) through an opening in a bottom of the pulse receiving part (41) sealed in the receiving space (42) is performed.
    [8]
    8. Clamping device according to one of claims 1 to 7, characterized in that the clamping device has a clamping ring (23) which has an inclined surface (23a) with the clamping balls (24) interact, the clamping ring (23) in the clamping position of the Clamping element (11) is acted upon by the clamping element (11) against the clamping balls (24) and presses them into an annular groove (7a) of the retractable nipple (7).
    [9]
    9. Clamping device according to claim 8, characterized in that on the side of the clamping balls (24) remote from the pulse unit (12)
    20/33
    Opening ring (27) is arranged, the opening ring (27) in the open position of the clamping element (11) pushing the clamping balls (24) out of the annular groove (7a) of the retractable nipple (7).
    [10]
    10. Clamping device according to claim 8 or 9, characterized in that the clamping balls (24) rest on the side facing the pulse unit (12) on a support plate (25) which is biased by a spring (26) against the clamping balls (24) ,
    21/33
    Zj / 6


    293 27
    22/33

    23/33


    24/33
    295 27

    293 27
    25/33

    26/33
    293 27

    27/33
    293 27
    1.6
    9327
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    同族专利:
    公开号 | 公开日
    WO2020148178A1|2020-07-23|
    EP3911475A1|2021-11-24|
    AT521254B1|2019-12-15|
    CN113348053A|2021-09-03|
    KR20210122257A|2021-10-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE102007045695A1|2007-09-24|2009-04-02|Hs-Technik Gmbh|Hydropneumatic impulse power screwdriver has hydropneumatic drive provided over electro motor with power for generating torsional impulse, where drive shaft is coupled in bolted connection for transferring torsional impulse|
    WO2014044390A1|2012-09-19|2014-03-27|Stark Spannsysteme Gmbh|Clamping system with a rotation drive|
    DE4343582A1|1993-12-21|1995-06-22|Bosch Gmbh Robert|Impact mechanism, especially for pulse screwdrivers|
    DE10216003B4|2002-04-11|2005-03-10|Multitest Elektronische Syst|Docking device|
    JP4008865B2|2003-08-01|2007-11-14|株式会社東洋空機製作所|Fastener|
    DE502006005743D1|2006-11-13|2010-02-04|Cooper Power Tools Gmbh & Co|Tool with a hydraulic impact mechanism|AT523492A1|2020-01-31|2021-08-15|Cutpack Com Gmbh|Clamping device for clamping a workpiece|
    CN112958854A|2021-04-01|2021-06-15|安徽机电职业技术学院|Combined clamp for machining automobile gearbox gear|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA20/2019A|AT521254B1|2019-01-17|2019-01-17|jig|ATA20/2019A| AT521254B1|2019-01-17|2019-01-17|jig|
    EP20700482.1A| EP3911475A1|2019-01-17|2020-01-10|Clamping device|
    PCT/EP2020/050515| WO2020148178A1|2019-01-17|2020-01-10|Clamping device|
    CN202080009711.9A| CN113348053A|2019-01-17|2020-01-10|Clamping device|
    KR1020217025856A| KR20210122257A|2019-01-17|2020-01-10|clamping device|
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