• 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:
    The invention relates to a slide (1) comprising a base plate (4), a movable plate (5) and a clamping actuator for locking the movable plate on the base plate. The slide is characterized in that the clamping system comprises at least one shaft (3) inserted in the base plate, said shaft having at least one eccentric section and at least one slide (2) actuated by said shaft, said slide being slidable in at least one slide arranged in the movable plate, said slider being adapted to be locked in said slide by rotation of said shaft to lock the movable plate on the base plate. The invention also relates to a positioning system comprising a slide according to the invention.
    公开号:CH712892A2
    申请号:CH01167/16
    申请日:2016-09-08
    公开日:2018-03-15
    发明作者:Depetris Fabio；Sabato Luigi
    申请人:Sabato Microtec Gmbh；
    IPC主号:
    专利说明:

    TECHNICAL FIELD [0001] The present invention relates to a slide and a positioning system comprising said slide.
    State of the art [0002] Slides are particularly used in industrial systems, for example machine tools to control and maintain the relative position of the tool relative to the workpiece during machining. Linear slides allow the part or tool to slide linearly relative to a frame or other part.
    Linear guidance slides are known comprising a movable plate on which is held a tool or a part to be positioned. The moving plate slides on a base plate thanks to two parallel rails on ball bearings. This type of slide also comprises a clamping screw on the side of the movable plate which passes through it to compress one of the rails and thus block the sliding of the movable plate. This type of slide is equipped with a micrometric screw to adjust the position of the screwed tool on the movable plate. The user turns the adjustment screw to place the tool in the desired position. To lock the tool position, the user tightens the clamping screw with enough torque to hold the tool in the desired position.
    Alternatively, there are also known slides where the ball bearing rails are replaced by dovetail slides. In this case, the slide comprises a bacon sandwiched between the movable plate and the base plate. When tightening, the screw compresses the bacon against the movable plate to block the slide.
    In the slide rails or dovetailed slides, the clamping screw is on the side of the slide. Thus, during the clamping by rotation of the clamping screw, it has been observed a lateral displacement or a torsion of the movable plate relative to the base plate, so that the tool or the part held by the slide deviates from the desired position. It is thus very difficult to precisely adjust the position of the tool.
    In addition, during the machining vibrations and tool voltages cause the loosening of the clamping screw which disrupts the position of the movable plate and the tool or the part mounted on this plate. It is then necessary to stop the machine tool to correct the position. A machine stop is a very constraining event for an industry, especially in terms of cost and productivity, the user having to restart the adjustment of the machine after each stop.
    BRIEF SUMMARY OF THE INVENTION [0007] An object of the present invention is to provide a slideway free from the limitations of the known slides.
    Another object of the invention is to provide a slide with a clamping system free from the limitations of known clamping systems.
    According to the invention, these objects are achieved in particular by means of a slide comprising:
    A base plate and a movable plate. - A slide arranged in the movable plate; - A clamping system for locking the movable plate on the base plate, the slide being characterized in that the clamping system comprises: - At least one shaft inserted in the base plate, said shaft having at least one eccentric section, - At least one slide slidable relative to the slide, said slide cooperating with said shaft to block the relative movement of the movable plate relative to the base plate or to allow this displacement in the angular position of the shaft.
    This solution has the advantage over the prior art to ensure clamping and loosening of the slide without lateral displacement of the movable plate relative to the base plate. When a tool or a piece is fixed on the slide, for example on the movable plate, the position of this tool or this piece remains constant during the tightening and loosening of the slide.
    Preferably, the clamping and loosening is performed along the z axis perpendicular to the slide, unlike the prior art or the clamping is performed along a y axis. Thus, it avoids the lateral displacement of the movable plate during tightening and loosening.
    Preferably, the clamping is obtained by friction between the assembly of the contact surface between the movable plate and the base plate. This ensures optimal and uniform clamping. This also avoids concentrating braking on the slide or on limited portions of the slide that could deform if they absorbed all the constraints.
    This solution also maintains the position after clamping and loosening, for example when the slide is used in a machine tool, when machining a workpiece by the machine tool.
    The slider preferably has two functions. First, in the loose position, the slide is slidable relative to the slideway arranged in the movable plate (function called "slide"). In the clamping position, the slide is also able to be locked in this slide (function called "brake"). The position of the slide depends on the angular position of the shaft. The passage from the loosened position to the clamping position is by rotation of the shaft.
    Here is meant by slider element intended to be housed at least partially in the slideway to allow the translation of the movable plate relative to the base plate and the locking of the movable plate on the base plate.
    To allow its first function called "slide", the slide is dimensioned to minimize the frictional forces between the slide and the slide and thus facilitate the sliding of the movable plate on the base plate. Thus, the user can move the movable plate relative to the base plate to adjust the desired position.
    Advantageously, in a second function the slider is also adapted to be locked in the slide, in a function called "brake". For this, the slide acts as a brake to block the movement of the movable plate relative to the base plate.
    The slide comprises at least one shaft inserted into the base plate, said shaft having at least one eccentric section. An eccentric section is a section whose radius varies around the axis of rotation of the shaft.
    The eccentric section thus acts as a cam to move the slide perpendicular to the axis of rotation of the shaft, during tightening and loosening.
    In one embodiment, the eccentric section is constituted by a reduced radius cylinder relative to the rest of the shaft, and whose center is offset relative to the axis of rotation of the shaft.
    The rotation of the shaft blocks the slide in the slide to lock the movable plate on the base plate. Thus, the rotation of the shaft makes it possible to control the function of the slider, to alternate between the "sliding" function and the "brake" function: the rotation of the shaft in one direction makes it possible to block the slider ("brake" mode). ), the moving plate is then locked on the base plate. Turning in the opposite direction releases the slide ("slide" mode) to unlock the moving plate of the base plate.
    In one embodiment, the slide comprises a head adapted to be housed in the slideway. The head comes to bear against the slide during the rotation of the shaft to lock the movable plate on the base plate.
    In one embodiment, the head has a shape of "T", each edge bears against a corresponding flange of the slide.
    In one embodiment, the action of the shaft during tightening has the effect of pulling the slide towards the base plate. This traction force is transmitted to the slide of the movable plate and has the effect of pressing the movable plate against the base plate in the brake position.
    The locking is obtained both by the friction of the lower portion of the slide head against the edges of the slide, and by the friction of the movable plate against the base plate.
    In one embodiment, the slide comprises an opening in which is inserted the eccentric section of the shaft. Thus, when the eccentric section of the shaft is engaged on the slider, the slider is locked in the slider and presses the movable plate against the base plate, so that sliding is locked; the slide is in "brake" function. Conversely, when the eccentric section is not engaged on the slide, the movable plate can slide on the base plate, the slide is in "sliding" function.
    According to one embodiment, the slide comprises a linear guide for guiding the displacement of the movable plate along the base plate. The linear guide facilitates sliding of the movable plate on the base plate ("slide" mode) by minimizing friction between the base plate and the movable plate.
    The linear guide may be integrated with the slide, or constitute this slide.
    Linear guidance may be an independent element of the slideway.
    According to an embodiment, the linear guide can comprise ball bushings, ball bearings, dovetails or a combination of these guides.
    According to one embodiment, the linear guide comprises at least two ball bushings. The use of two ball bushings makes it possible to improve the positioning accuracy of the movable plate during its movement along the base plate.
    In one embodiment, the clamping system comprises a clamping actuator for actuating the rotation of the shaft. The actuator is coupled to the shaft, for example at one end of the shaft, to provide the torque necessary for the rotation of the shaft.
    According to one embodiment, the slide comprises a setting actuator for adjusting the position of the movable plate relative to the base plate. Thus, it is possible to adjust the position of the movable plate, and the tool fixed on said plate, with precision. For example, the adjustment actuator is a micrometric adjustment actuator for setting the position with micrometer accuracy.
    In one embodiment, the adjustment actuator and the clamping actuator are on the same side of the slide. The invention is not limited to a slide or the adjusting actuator and the clamping actuator are on the same side of the slide. However, the combination of the clamping actuator and the setting actuator on the same side of the slide facilitates the use of the slide, particularly when the slide is incorporated in a machine tool: access to a only the side of the slider adjusts the position and tightening. The slide is thus more easily integrated in a machine tool or other device.
    According to one embodiment, the adjustment actuator bears against an abutment of the movable plate. The stop on which the adjustment actuator is supported ensures accuracy and stability of the position. For example, the stop is hard metal, not deformable, to ensure high reliability and repeatability.
    In one embodiment, the clamping actuator and / or the adjusting actuator is selected from mechanical actuators, electrical or electronic actuators, pneumatic actuators. For example, the adjustment actuator is mechanical, for example a micrometer screw, electric, for example a motor with / without encoder, a piezoelectric or pneumatic actuator.
    According to one embodiment, the clamping actuator is a dynamometric actuator. Thus, it is possible to control the tightening torque exerted by the shaft against the slide.
    In one embodiment, the base plate and the movable plate each comprise at least one fixing hole arranged in the thickness of said plate. The holes are arranged so as to allow the assembly of the base plate of a slide on the movable plate of another identical slide, the directions of the two slides being orthogonal. The slide according to this embodiment can be used in a modular system which includes several associated slides using the holes of the movable plate and / or those of the base plate.
    In one embodiment, at least one of the fixing holes is threaded to allow screwing a screw and / or a pin.
    According to one embodiment, the movable plate is associated with at least one tension spring. The traction spring makes it possible to ensure the return of the movable plate to its initial position along the axis of displacement of the movable plate. When the slide comprises an adjusting actuator, the tension spring ensures the permanent contact between the adjusting actuator and the plate to guarantee the accuracy of the adjustment.
    In one embodiment, the slide comprises a shaft having two eccentric sections and two slides, each eccentric section being inserted into a slide. This embodiment makes it possible to improve the accuracy of the relative positioning of the movable plate on the base plate. This avoids a risk of tilting of the movable plate during locking, and to distribute the clamping forces transmitted from the shaft to the movable plate.
    In one embodiment, the slide comprises two shafts each having two eccentric sections, and four slides, each eccentric section being inserted into a slide. This ensures a parallelism of the base plate and the movable plate during locking or locking, while distributing the traction forces even better.
    In one embodiment, the slide can accept maximum loads between 20 kg and 50 kg along the z axis.
    In one embodiment, the slide can accept maximum loads of 100kg along the z axis.
    The maximum load along the z axis is proportional to the dimensions of the slide.
    The invention also relates to a positioning system comprising at least one slide according to the invention.
    In one embodiment, the system comprises at least two slides according to the invention.
    The modular system is adaptable according to the axes of adjustments of the tool attached to the slide (according to x, y, and / or z).
    In one embodiment of the system according to the invention, the system comprises at least three slides, one along the x axis, one along the y axis and one along the z axis.
    The embodiments relating to the slide apply mutatis mutandis to the positioning system according to the invention and vice versa.
    The term clamping is used to describe the action of locking the movable plate on the base plate. The term loosening describes the reverse action.
    BRIEF DESCRIPTION OF THE FIGURES [0051] Examples of implementation of the invention are indicated in the description illustrated by the appended figures in which:
    Fig. 1 shows an exploded view of an embodiment of a slide according to the invention;
    Fig. 2 shows a sectional view of the slide of FIG. 1;
    Fig. 3 shows a sectional view along an axis FF 'of the slide of FIG. 1;
    Fig. 4 is an enlargement of FIG. 3;
    Fig. 5 represents the shaft at the eccentric section;
    Fig. 6 shows a sectional view of the slide engaged in the slideway;
    Fig. 7 is a general view of an embodiment of a positioning system according to the present invention.
    Example (s) of Embodiment of the Invention An embodiment of a slide 1 according to the present invention is shown in FIGS. 1-6. In this embodiment, the slide 1 comprises two sliders 2 on a shaft 3, but the invention is not limited to this embodiment. The invention also relates to a slide with all other slide-shaft combinations.
    FIG. 1 shows an exploded view of the slide 1. The slide 1 comprises a base plate 4 and a movable plate 5, the two plates 4, 5 having in this example a rectangular parallelepiped shape. The two plates 4, 5 are superimposed on their respective major faces. The slide 1 further comprises a front plate 6 fixed on the width of the base plate 4 and a rear plate 7 fixed on the width of the movable plate 5. Thus, when the movable plate 5 is on the base plate 4, the front plate 6 is opposed to the rear plate 7, that is to say the base plates 4 and mobile 5 are sandwiched between the front plates 6 and posterior 7.
    Each shaft 3 is inserted into a conduit 8 which passes through the front plate 7 and the base plate 4. At the base plate 4, the conduit 8 opens on two successive housing 9 arranged in the thickness of the base plate 4, these housings 9 being blind holes open on the interface base plate 4 / movable plate 5. Each slide 2 is housed in a housing 9.
    The movable plate 5 comprises a slideway 10 arranged in the face of the movable plate 5 with respect to the base plate 4, as shown in FIG. 2. The slide 10 is intended to receive the slides 2. Thus, a portion (the head) of each slide 2 is housed on the one hand in a slide 10 of the movable plate 5 while another portion (the body) the slide is housed in a housing 9 of the base plate 4, as shown in FIG. 6.
    The front plate 6 is connected to a micrometer actuator 11 which abuts on a stop 12 of the movable plate 5. The user turns the micrometer actuator to screw it into the front plate 6 and adjust the longitudinal position of the movable plate 5. When a tool is attached to the movable plate 5, the setting of the movable plate 5 determines the position of the tool.
    Other actuators may be provided to move the movable plate 5 relative to the base plate 4, for example motorized actuators.
    The slide may also comprise at least one tension spring (not shown) which connects the movable plate 5 to the front plate 6. The tension spring ensures permanent contact between the stop 12 and the micrometer actuator 11.
    The rear plate 7 comprises two ball bushings 13 driven on said plate 7 which provide linear guidance when the movable plate 5 slides along the base plate 4. Each sleeve 13 is housed in a passage 14 arranged in the base plate 4, each passage 14 being parallel to the conduit 8, as shown in FIG. 3.
    In the embodiment shown in FIGS. 1 to 6, the slider 2 comprises a head 15 and a body 16. The head 15 is in the shape of a "T" and dimensioned to slide in the slideway 10. The body 16 comprises an opening 17 passing through the body 16 from one side to the other in which is inserted the eccentric portion of the shaft 3, as shown in FIG. 6.
    The shaft 3 has two eccentric sections 18, each of the eccentric sections 18 being inserted into an opening 17 of a slider 2. The eccentric section 18 is a portion of the shaft 3 which has a lower section than the rest of the the section of the shaft 3, as illustrated in FIG. 4. At the eccentric section 18, the diameter of the shaft 3 is variable about the axis of rotation of the shaft 3, the diameter being reduced to a maximum of a distance "d" on part of the section of the shaft, as shown in fig. 5 and 6.
    In the present invention, the distance "d" defines the maximum clearance between the shaft 3 and the body 16 of the slider 2. The clearance is for example of the order of 0.1 mm to 2.0 mm. In particular, the clamping of the slide according to the invention is optimal for a clearance of between 0.3 mm and 0.7 mm. The play to obtain optimal tightening depends on the dimensions of the slide according to the invention.
    To lock the movable plate 5 on the base plate 4, the user operates the shaft 3 in one direction ("clamping"), the clearance between the eccentric section 18 and the body 16 of the slide is reduced to the eccentric section 18 engages the body 16, as shown in FIG. 6. The head 15 then bears on the edges of the slide 10, the slide 2 is locked in the slide 10 which locks the movable plate 5 on the base plate 4. To unlock the slide 1, the user maneuver the shaft in the opposite direction to the "tightening" direction ("loosening") so that the shaft is no longer engaged on the body 16 of the slider 2, which unlocks the movable plate 5 of the base plate 4.
    In this embodiment, the shaft is in direct engagement with the slider for the clamping maneuver. The invention is not limited to this embodiment. The invention also relates to other embodiments where the shaft actuates the slide indirectly, for example by a gear, a lever mechanism, a cam system.
    In the embodiment shown in FIGS. 1-6, the shaft 3 comprises a mechanical clamping actuator in the form of a hexagonal screw head for operating the shaft using an allen key. The screw head can be a torque screw for controlling the tightening torque of the shaft 3. Alternatively, it is possible to couple the shaft 3 to a pneumatic, electric or electronic clamping actuator.
    FIG. 7 shows an embodiment of a positioning system according to the invention. This system is a modular system that comprises three slides 1 according to the invention. The slides are fixed to each other using the holes 19. Each slide 1 is oriented along an axis x, y, or z to allow precise adjustment of the position of the tool 20 - shown schematically in FIG. . 7.
    Reference numbers used in figures [0067] 1 Slide 2 Slide 3 Shaft 4 Base plate 5 Slide plate 6 Faceplate 7 Back plate 8 Conduit 9 Housing 10 Slide 11 Micrometric adjustment actuator 12 Stop 13 Bushing 14 Bushing 15 Head slide 16 Slide body 17 Slide opening 18 Eccentric section 19 Mounting holes Base plate or moving plate 20 Tool
    权利要求:
    Claims (15)
    [1]
    claims
    1. Slide (1) comprising: - a base plate (4) and a movable plate (5), - a slide (10) arranged in the movable plate (5); - A clamping system for locking the movable plate (5) on the base plate (4), the slide (1) being characterized in that the clamping system comprises: - At least one shaft (3) inserted into the plate base (4), said shaft (3) having at least one eccentric section (18), - At least one slide (2) slidable relative to the slide (10), said slide (2) cooperating with the shaft (3) to block the relative displacement of the movable plate (5) relative to the base plate or to allow this displacement according to the angular position of the shaft (3).
    [2]
    2. Slide (1) according to claim 1 wherein said slide (2) comprises a head (15) adapted to be housed in said slide (10), said head (15) abutting against the slide (10) when rotating the shaft (3) to lock the movable plate (5) on the base plate (4).
    [3]
    3. Slide (1) according to one of claims 1 or 2 wherein said slide (2) comprises an opening (17) in which is inserted the eccentric section (18) of the shaft (3).
    [4]
    4. Slide (1) according to one of claims 1 to 3, arranged so that the action of the shaft (3) during clamping has the effect of pulling the slide (2) towards the plate base (4) and to press the movable plate (5) against the base plate (4) in the brake position.
    [5]
    5. Slide (1) according to one of the preceding claims wherein the slide (1) comprises a linear guide for guiding the movement of the movable plate (5) along the base plate (4).
    [6]
    6. Slide (1) according to claim 5, wherein the linear guide comprises at least two ball bearings (13).
    [7]
    7. Slide (1) according to one of the preceding claims wherein the clamping system comprises a clamping actuator for actuating the rotation of the shaft (3).
    [8]
    8. Slide (1) according to one of the preceding claims further comprising a setting actuator (11) for adjusting the position of the movable plate (5) relative to the base plate (4).
    [9]
    9. Slide (1) according to the preceding claim wherein the adjusting actuator (11) and the clamping actuator are on the same side of the slide (1).
    [10]
    10. Slide (1) according to claim 8 or 9 wherein the actuator adjustment (11) abuts on a stop (12) of the movable plate (5).
    [11]
    11. Slide (1) according to one of the preceding claims wherein said clamping actuator or said actuator (11) is selected from mechanical actuators, electronic actuators, pneumatic actuators.
    [12]
    12. Slide (1) according to one of claims 10 or 11 wherein the clamping actuator is a torque actuator.
    [13]
    13. Slide (1) according to one of claims 1 to 12 wherein the base plate (4) and the movable plate (5) each comprise at least one hole (19) of fixing arranged in the thickness of said plate said holes (19) being arranged so as to allow the assembly of the base plate (4) of a slide on the movable plate (5) of another identical slide, the directions of the two slides (1) being orthogonal.
    [14]
    14. Slide (1) according to one of claims 1 to 13 wherein the movable plate (5) is associated with at least one tension spring.
    [15]
    15. Positioning system comprising at least one slide (1) according to one of claims 1 to 14.
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    同族专利:
    公开号 | 公开日
    CH712892B1|2020-11-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH01167/16A|CH712892B1|2016-09-08|2016-09-08|Slide and positioning system.|CH01167/16A| CH712892B1|2016-09-08|2016-09-08|Slide and positioning system.|
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