A linear motor module

Abstract

The application discloses a linear motor module, comprising a track, a slider, a mover coil and a stator magnet. The track comprises a bottom plate and two side plates arranged on both sides of the bottom plate in the width direction, the bottom plate and the two side plates jointly form an accommodating space, and the slider is partially arranged in the accommodating space. Strengthening parts are arranged between the bottom plate and the side plates and extend obliquely, and part of the mover coil is located between the two strengthening parts. The side of the slider close to the bottom plate is provided with a middle matching surface and two first inclined surfaces, and the side of the mover coil close to the slider is provided with a middle mounting surface and two second inclined surfaces, the second inclined surfaces are matched with the corresponding first inclined surfaces. The flat side surfaces on both sides of the mover coil are oppositely and spacedly arranged with the strengthening parts. The structure can improve the supporting rigidity of the side plates of the track, and the mover coil can be arranged in the space below the slider and between the two strengthening parts, so that the cross-sectional size of the module and the inertia of the moving parts are reduced, and the compactness and dynamic response performance of the linear motor module are improved.

Description

Technical Field

[0001] This invention relates to the field of linear motion module technology, and more particularly to a linear motor module. Background Technology

[0002] Linear motion modules are widely used in automated equipment, precision machining equipment, and electronic assembly equipment to support workpieces or actuators and drive them to move linearly in a predetermined direction. Existing linear motion modules typically include lead screw modules and linear motor modules. Lead screw modules generally use a rotary motor to drive the lead screw to rotate, which in turn moves a slide table. These modules have a large number of driving and transmission components and a relatively long transmission path.

[0003] Linear motor modules can directly output linear driving force, and are therefore widely used in applications requiring high motion speed, acceleration, and response performance. Existing linear motor modules typically have a base with an independent linear guide rail mounted on each side of the base's width. Each linear guide rail has a guide rail slider, and the motion platform spans across the guide rail sliders on both sides. The guide rail sliders on both sides jointly support the motion platform and guide its movement along the linear guide rails. Because the two linear guide rails, guide rail sliders, and motion platform are set up independently, the base needs to reserve mounting areas for both the linear guide rails and the linear motor, resulting in a large space occupied in the width direction of the module, and a large overall size and weight. When the size and weight of the motion platform are large, its moment of inertia also increases, which is detrimental to improving the module's dynamic response performance.

[0004] In addition, conventional guide rail structures use a slider that wraps around the rail from the outside, which results in a generally large lateral dimension of the slider. This also increases the weight and space occupied by the moving parts, which limits its application in situations where stroke requirements are relatively limited and compactness and lightweight requirements are high. Summary of the Invention

[0005] To address the aforementioned shortcomings, this invention proposes a linear motor module.

[0006] The technical solution adopted in this invention is a linear motor module, comprising: The track includes a base plate and two side plates, the two side plates being respectively disposed on both sides of the base plate in the width direction, the base plate and the two side plates together forming an accommodating space extending along the length direction of the track; The slider is at least partially disposed within the receiving space and is capable of moving along the length of the track; The moving coil is installed on the side of the slider near the base plate; The stator magnet is disposed on the side of the base plate near the slider and is positioned opposite to the mover coil.

[0007] Preferably, the two side plates facing the slider are respectively provided with two first raceways spaced apart along the height direction of the track, and the slider is provided with second raceways on both sides in the width direction, which correspond one-to-one with the first raceways. Both the first raceways and the second raceways extend along the length direction of the track. The second raceway has a slot facing the corresponding first raceway. The minimum opening size of the slot is smaller than the diameter of the ball. A plurality of balls are accommodated in the second raceway. A portion of each ball extends out of the second raceway through the slot and rolls into contact with the corresponding first raceway. The slider is provided with a return ball channel that corresponds one-to-one with the second raceway, and both ends of the slider are respectively provided with a turning channel that connects the second raceway and the corresponding return ball channel.

[0008] Preferably, a reinforcing portion is provided between the base plate and each of the side plates, and each reinforcing portion extends obliquely from the base plate to the corresponding side plate; The two reinforcing parts are arranged opposite each other, and at least a portion of the moving coil is located between the two reinforcing parts.

[0009] Preferably, the side of the slider near the base plate includes a central mating surface and two first inclined surfaces located on both sides of the width direction of the central mating surface; The moving coil near the slider includes a central mounting surface opposite to the central mating surface and two second inclined surfaces located on both sides of the width direction of the central mounting surface. The two second inclined surfaces are respectively opposite to the two first inclined surfaces and their outlines are adapted to each other.

[0010] Preferably, the moving coil has two straight side surfaces extending along the height direction of the track on both sides in the width direction, and each straight side surface is connected to the side of the corresponding second inclined surface away from the central mounting surface; The two straight side surfaces are respectively disposed opposite to the two reinforcing parts, and are spaced apart from the corresponding reinforcing parts; The distance between the two flat sides is greater than the dimension of the central mounting surface along the width of the track.

[0011] Preferably, it also includes a mounting slide, the mounting slide including a transverse connecting portion extending along the width direction of the track and two end bearing plates respectively disposed at both ends of the transverse connecting portion in the width direction, the two ends of the transverse connecting portion being respectively connected to the middle of the two end bearing plates; The transverse connecting portion has a first side facing the slider and a second side away from the slider, and the first side of the transverse connecting portion is fixedly connected to the slider. Each of the end bearing plates includes a first extension extending from its connection position with the transverse connection portion toward the first side, and a second extension extending toward the second side, wherein each of the second extensions has a workpiece mounting portion at one end away from the transverse connection portion.

[0012] Preferably, the projection of each end bearing plate in the track height direction at least partially overlaps with at least one second raceway and / or first raceway located on the same side of the slider.

[0013] Preferably, each of the first extensions is spaced apart from the corresponding side plate and at least partially overlaps the corresponding side plate in the track height direction; Side sealing strips are provided on both sides of the slider in the width direction. One end of the side sealing strip is installed on the slider and moves with the slider, and the other end extends towards the end of the corresponding side plate away from the bottom plate. Each of the side sealing strips is at least partially located between the corresponding first extension and the side plate, and slides against the end of the corresponding side plate opposite to the bottom plate.

[0014] Preferably, the track is provided with end baffles at both ends along its length, and each end baffle is connected to the bottom plate and the two side plates, and at least partially closes the corresponding end of the accommodating space; The end baffle is provided with a buffer mounting part on the side facing the receiving space, and an anti-collision block is installed on the buffer mounting part; the anti-collision block protrudes towards the slider and is located on the moving path of the slider along the length direction of the track.

[0015] Preferably, each of the two end baffles has a cover plate mounting portion at the end furthest from the bottom plate; The linear motor module also includes a cover plate extending along the length of the track, with both ends of the cover plate respectively installed at two cover plate mounting portions, and at least partially covering the opening of the accommodating space; The transverse connecting portion and the two end bearing plates together define a clearance space located on the second side of the transverse connecting portion and extending along the length direction of the track. The cover plate passes through the clearance space and is spaced apart from the mounting slide. The mounting slide can move relative to the cover plate along the length direction of the track. The workpiece mounting portion has a workpiece mounting surface that is away from the slider, and the surface of the cover plate that is away from the slider is located on the side of the workpiece mounting surface closer to the slider.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention uses a base plate and two side plates to form an accommodating space, and places the slider within the accommodating space. At the same time, the mover coil is installed on the side of the slider near the base plate, and the stator magnet is placed on the side of the base plate near the slider. This allows the linear guide structure and linear drive structure to be concentrated inside the track, reducing the need for independent guide rails, mover mounting seats, and transverse motion platforms, thus reducing the space occupied by the module in the width and height directions, and reducing the mass and inertia of the moving parts. This is beneficial for improving the module's movement speed and dynamic response performance.

[0017] 2. This invention, by setting a four-row ball bearing circulation structure between the slider and the two side plates, enables the slider to obtain multi-point rolling support in both the width and height directions of the track, improving the slider's attitude stability when subjected to magnetic loads, lateral loads, and overturning loads. The inclined reinforcing section set between the base plate and the side plates enhances the support stiffness of the side plate root and forms a compact arrangement with the mover coil that avoids each other; the matching plane and inclined surface between the slider and the mover coil enables the positioning and load transfer of the mover coil, reduces the need for additional transition installation structures, and helps maintain the relative position between the mover coil and the stator magnet.

[0018] 3. This invention uses a transverse connecting part and two end bearing plates to form a mounting slide, enabling the workpiece load to be transferred to the rolling support areas on both sides of the slider, reducing the overturning moment caused by eccentric loads, while also taking into account the workpiece mounting width and the lightweight of moving parts. The first extension, side sealing strip, end baffle, and cover plate together provide lateral, end, and opening protection for the accommodating space and raceway area, reducing the entry of foreign objects into the ball recirculation structure and linear drive area; the anti-collision block can also buffer the impact on the end of the slider, thereby improving the reliability and service life of the module operation. Attached Figure Description

[0019] The present invention will now be described in detail with reference to the embodiments and accompanying drawings, wherein: Figure 1 This is a schematic diagram of the overall structure of the linear motor module; Figure 2 yes Figure 1 The main view; Figure 3 This is a partial structural diagram of the track; Figure 4 This is a partial structural diagram of a linear motor module; Figure 5 yes Figure 2 AA-direction cross-section.

[0020] 10. Track; 11. Base plate; 12. Side plate; 13. Reinforcing section; 20. Slider; 21. Ball return channel; 22. Second raceway; 23. Side sealing strip; 30. Moving coil; 31. Middle mounting surface; 32. Second inclined surface; 33. Flat side surface; 40. Stator magnet; 50. Mounting slide; 51. Lateral connecting part; 52. End bearing plate; 53. First extension; 54. Second extension; 60. End baffle; 61. Anti-collision block; 70. Cover plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In one embodiment, see Figure 1 and Figure 2 A linear motor module includes a track 10, a slider 20, a mover coil 30, and a stator magnet 40. The track 10 serves as a fixed base for the module and provides linear movement space for the slider 20; the slider 20, as a moving component, carries the mover coil 30 and external loads; the mover coil 30 and the stator magnet 40 together constitute a linear drive assembly.

[0023] See Figure 3 The track 10 includes a base plate 11 and two side plates 12. The two side plates 12 are located on both sides of the base plate 11 in the width direction and extend along the length direction of the track 10. The base plate 11 and the two side plates 12 can be integrally formed, or they can be processed separately and connected by welding, fastening, or other fixing methods. The base plate 11 and the two side plates 12 together form an accommodating space, making the track 10 as a whole form a groove-shaped structure. The accommodating space extends continuously along the length direction of the track 10 and is used to centrally arrange the slider 20, the mover coil 30, and the stator magnet 40, reducing the installation space occupied by the components scattered on the outside of the track 10.

[0024] Two side plates 12 are located on either side of the slider 20 in the width direction, which can constrain the movement range of the slider 20 from both sides. The base plate 11 is located on the side of the slider 20 near the stator magnet 40, and is used to support the stator magnet 40 and maintain the installation position of the stator magnet 40 relative to the slider 20. The track 10 can be made of a metal material with sufficient strength and rigidity to maintain the structural stability of the accommodating space during the movement of the slider 20 and the application of load.

[0025] The slider 20 is at least partially disposed within the receiving space, and its length direction is aligned with the length direction of the track 10. The slider 20 is capable of reciprocating relative to the track 10 along the length direction of the track 10 without significant lateral offset due to the drive of the mover coil 30. The slider 20 can be an integral structure or formed by combining the slider 20 body with a mounting component. The slider 20 is used to transmit the linear driving force generated by the mover coil 30 to the external actuator and to concentrate the moving parts inside the track 10, thereby reducing the outward extension of the moving parts in the width direction of the track 10.

[0026] The mover coil 30 is mounted on the side of the slider 20 near the base plate 11 and moves synchronously with the slider 20. The mover coil 30 may include windings and an insulating encapsulation covering the windings. The windings can be fixed to the slider 20 by potting, bonding, fastening, or embedding. The mover coil 30 is arranged close to the base plate 11 so that it can maintain a small and stable relative distance with the stator magnet 40 located on the base plate 11, which is beneficial for forming a continuous linear driving force and avoids the need for an additional independent mover mounting platform.

[0027] The stator magnet 40 is disposed on the side of the base plate 11 near the slider 20 and arranged along the length of the track 10. The stator magnet 40 can be a magnet assembly extending along the length of the track 10, or it can be formed by arranging multiple permanent magnet units sequentially. The stator magnet 40 can be fixed to the base plate 11 by bonding, fastening, pressing, or embedding. The stator magnet 40 and the mover coil 30 are arranged opposite each other, so that a driving area continuously distributed along the length of the track 10 is formed between them.

[0028] In practical use, the track 10 is fixedly installed on the equipment frame or other supporting foundation, and the stator magnet 40 remains fixed relative to the track 10. After the external driver supplies a controlled current to the mover coil 30, an electromagnetic force is generated between the mover coil 30 and the stator magnet 40 along the length of the track 10, causing the mover coil 30 to drive the slider 20 to move within the receiving space. By changing the direction and magnitude of the current, the direction of movement, speed, and output thrust of the slider 20 can be controlled.

[0029] In this embodiment, the slider 20 is placed within the accommodating space enclosed by the base plate 11 and two side plates 12, and the mover coil 30 is directly installed on the side of the slider 20 closest to the base plate 11, so that the guiding motion component and the linear drive component are concentrated inside the track 10. Compared with the structure in which the guiding mechanism, motion platform and mover mounting structure are arranged separately, the connection layers between components can be reduced, the overall width of the module and the size of the moving components can be reduced, and the number of components that need to be driven during the movement of the slider 20 can be reduced, thereby improving the dynamic response performance of the module. It is suitable for application scenarios with high requirements for compactness and lightweighting.

[0030] In one embodiment, each of the two side plates 12 has two first raceways on the side facing the slider 20, and the two first raceways on the same side plate 12 are arranged at intervals along the height direction of the track 10. See also Figure 5 Two second raceways 22 are provided on each side of the slider 20 in the width direction, and the four second raceways 22 correspond one-to-one with the four first raceways. The first raceways and the second raceways 22 both extend along the length direction of the track 10, thereby forming four rows of rolling supports between the slider 20 and the track 10, dispersing the load borne by the slider 20, and improving the stability of the slider 20 when it moves along the track 10.

[0031] The first raceway can be a longitudinal raceway groove formed on the inner side of the side plate 12, and the second raceway 22 can be a longitudinal receiving groove formed on the side of the slider 20. The groove surfaces of the first raceway and the second raceway 22 can be arc surfaces adapted to the outer peripheral surface of the ball, or they can be rolling contact surfaces formed by a combination of multiple arc surfaces. The first raceway and the corresponding second raceway 22 are arranged opposite to each other along the width direction of the track 10, so that the ball received in the second raceway 22 can maintain rolling contact with the first raceway.

[0032] The second raceway 22 has a slot facing the first raceway, extending along the length of the track 10. The minimum opening size of the slot is smaller than the diameter of the ball, keeping the main body of the ball inside the second raceway 22, with only a portion of the spherical surface protruding through the slot. Therefore, even if the slider 20 separates from the track 10, the ball is not easily dislodged laterally from the second raceway 22, facilitating the assembly, disassembly, and maintenance of the slider 20.

[0033] Multiple balls are arranged sequentially along the extension direction of the second raceway 22. After the slider 20 is installed in the receiving space, the portion of the balls extending out of the second raceway 22 contacts the first raceway, and the portion of the balls located between the first raceway and the second raceway 22 constitutes the bearing area. When the slider 20 moves relative to the track 10, the balls located in the bearing area roll between the first raceway and the second raceway 22, converting the relative motion between the slider 20 and the track 10 into rolling friction.

[0034] The slider 20 has ball return channels 21 that correspond one-to-one with the second raceways 22. Each ball return channel 21 passes through or substantially passes through the slider 20 along the length of the track 10 and is arranged at intervals with the corresponding second raceway 22. The inner diameter of the ball return channel 21 is adapted to the diameter of the ball, so that the ball can flow smoothly back in the ball return channel 21, while avoiding interference between different ball circulation rows.

[0035] The slider 20 has a steering channel at each of its two ends. One end of each steering channel is connected to the corresponding second raceway 22, and the other end is connected to the corresponding return ball channel 21. The steering channel can be formed directly at the end of the slider 20, or it can be formed by a steering component or end cap mounted at the end of the slider 20 together with the slider 20. The steering channel is curved and is used to guide the balls to change their direction of movement between the second raceway 22 and the return ball channel 21.

[0036] In practical use, the slider 20 moves along the track 10, and the balls in the bearing area roll along the second raceway 22 to the end of the slider 20, and then enter the return ball channel 21 through the corresponding turning channel. After the balls return to the other end of the slider 20 along the return ball channel 21, they re-enter the second raceway 22 through another turning channel, thus forming a continuous cycle. The four rows of balls circulate independently in their respective second raceways 22, turning channels, and return ball channels 21 to continuously support the slider 20 and guide the slider 20 to move along the length of the track 10.

[0037] Furthermore, in one embodiment, the slider 20 includes a body and a ball retaining plate. A ball return channel 21 is formed inside the body and extends along the length of the track 10. A raceway groove is formed on the side of the body facing the side plate 12. The ball retaining plate is mounted on the body at the position corresponding to the raceway groove, and together with the body, forms a second raceway 22. The opening of the second raceway 22 is formed between the ball retaining plate and the body, allowing a portion of the ball to extend through the opening and roll in contact with the first raceway.

[0038] The ball retainer plate can be a strip-shaped plate extending along the length of the track 10, with retaining edges on both sides adapted to the outer circumferential surface of the ball. The ball retainer plate can be fixed to the body by plugging, snapping, or fastening, or it can be embedded in a mounting groove formed on the side of the body. By adjusting the relative position between the ball retainer plate and the body, the minimum opening size of the groove can be made smaller than the diameter of the ball, thereby confining the ball within the second raceway 22.

[0039] The main body and the ball retainer plate adopt a split structure, so that the second raceway 22 does not need to be directly machined into a complete constriction groove inside the main body. During processing, an open raceway groove can be formed on the side of the main body first, and then the groove size can be limited by installing the ball retainer plate, thereby reducing the processing difficulty of the second raceway 22 and making it easier to control the raceway groove contour and groove opening separately, thus improving the forming accuracy of the second raceway 22.

[0040] In one embodiment, a reinforcing portion 13 is provided between the base plate 11 and the two side plates 12. Each reinforcing portion 13 extends obliquely from the base plate 11 toward the corresponding side plate 12 and connects the base plate 11 and the side plate 12, so that the base plate 11, the side plate 12, and the reinforcing portion 13 together form a stable support structure. The reinforcing portion 13 can be integrally formed with the base plate 11 and the side plate 12, or it can be separately processed and fixedly connected between the base plate 11 and the side plate 12.

[0041] The reinforcing part 13 preferably extends continuously along the length of the track 10, so that the side plate 12 can be supported within the length of the track 10. The inclined reinforcing part 13 can shorten the effective overhang length of the side plate 12 relative to the base plate 11, reduce the possibility of bending deformation of the side plate 12 under the load of the slider 20 and the rolling contact force, and improve the stability of the relative position between the two side plates 12.

[0042] Two reinforcing sections 13 are arranged opposite each other along the width direction of the track 10, with space reserved between them for accommodating the mover coil 30. At least a portion of the mover coil 30 extends between the two reinforcing sections 13, so that the reinforcing structure and the drive structure inside the track 10 are staggered in the same cross section. This structure eliminates the need to increase the rigidity of the track 10 by thickening the side plate 12 as a whole, and can enhance the support capacity of the track 10 while retaining the installation and movement space required for the mover coil 30, thus avoiding excessive space occupation by the reinforcing structure of the track 10.

[0043] When the linear motor module is running, the mover coil 30 moves along the length of the track 10 with the slider 20, and the reinforcing part 13 remains fixed relative to the track 10. The two reinforcing parts 13 can both support the corresponding side plates 12 and define the available space from both sides of the width direction of the mover coil 30, so that the mover coil 30 can move along a predetermined path inside the track 10, thereby balancing the rigidity of the track 10 and the compactness of the module cross section.

[0044] Furthermore, in one embodiment, the reinforcing part 13 is a long strip-shaped member extending along the length direction of the track 10 and embedded in the connection area between the base plate 11 and the corresponding side plate 12. The reinforcing part 13 is triangular in cross-section perpendicular to the length direction of the track 10, with two adjacent sides connected to the base plate 11 and the side plate 12 respectively, and the other side forming an inclined surface extending from the base plate 11 toward the side plate 12. The triangular cross-section allows the reinforcing part 13 to simultaneously form a first support surface connected to the base plate 11 and a second support surface connected to the side plate 12, which can increase the connection area between the reinforcing part 13 and the track 10, and disperse the lateral load and bending moment on the side plate 12 to the base plate 11, thereby improving the support stiffness at the root of the side plate 12 and reducing stress concentration at the junction and the possibility of the side plate 12 shifting inward toward the receiving space. In addition, the inclined surface of the triangular cross-section can support the side plate 12 while preventing the reinforcing part 13 from excessively protruding toward the center of the receiving space.

[0045] In one embodiment, the slider 20 has a central mating surface and two first inclined surfaces on the side near the base plate 11. The central mating surface is located in the middle of the slider 20 in the width direction, and the two first inclined surfaces are respectively disposed on both sides of the central mating surface and extend obliquely outward from the central mating surface in the width direction of the slider 20.

[0046] See Figure 4 The moving coil 30 has a central mounting surface 31 and two second inclined surfaces 32 on the side near the slider 20. The central mounting surface 31 is opposite to the central mating surface, and the two second inclined surfaces 32 are located on both sides of the central mounting surface 31 and are opposite to the two first inclined surfaces. The first inclined surfaces and the corresponding second inclined surfaces 32 have matching contours, and the two can be directly fitted together, or a mounting gap can be retained according to assembly requirements.

[0047] The moving coil 30 can be positioned on the side of the slider 20 near the base plate 11 by the central mounting surface 31 and the second inclined surface 32, and can be fixed by fastening, bonding or potting. The central mating surface and the central mounting surface 31 define the main mounting position of the moving coil 30, and the two sets of matching inclined surfaces restrict the displacement of the moving coil 30 relative to the slider 20 from both sides in the width direction, so that the moving coil 30 can be installed in the predetermined position.

[0048] Compared to installation using only a single flat surface, the combination of mating surfaces and inclined surfaces increases the corresponding area between the slider 20 and the moving coil 30, and allows the driving force on the moving coil 30 to be transmitted to the slider 20 through the central region and the inclined regions on both sides, reducing local stress concentration in the installation connection area. The two second inclined surfaces 32 are respectively adapted to the contours of the two first inclined surfaces, so that the side of the moving coil 30 near the slider 20 can conform to the irregular contour of the lower side of the slider 20, making full use of the inclined region on the lower side of the slider 20, and avoiding the need to add a transition mounting seat to adapt to the irregular contour, thereby reducing the superposition dimension of the slider 20 and the moving coil 30 along the height direction of the track 10.

[0049] During assembly, after the central mounting surface 31 aligns with the central mating surface, the second inclined surface 32 can achieve lateral positioning along the corresponding first inclined surface, facilitating control of the width direction position of the mover coil 30 relative to the slider 20. This contour mating relationship improves positional consistency during repeated assembly and helps maintain the relative position between the mover coil 30 and the stator magnet 40.

[0050] In one embodiment, flat side surfaces 33 are formed on both sides of the mover coil 30 in the width direction. Each flat side surface 33 extends along the height direction of the track 10 and is connected to the side of the corresponding second inclined surface 32 away from the central mounting surface 31, so that the part of the mover coil 30 near the slider 20 forms an inclined narrowing profile, while the part away from the slider 20 forms a main body area defined by the two flat side surfaces 33.

[0051] Two flat side surfaces 33 are respectively disposed opposite to the two reinforcing parts 13 and are spaced apart from the corresponding reinforcing parts 13. This space constitutes a clearance space when the moving coil 30 moves with the slider 20, preventing the moving coil 30 from contacting or interfering with the reinforcing parts 13 fixed to the track 10. The flat side surfaces 33 can provide a clear and continuous lateral boundary for the moving coil 30, which facilitates checking the relative position between the moving coil 30 and the reinforcing parts 13 during assembly.

[0052] The distance between the two flat side surfaces 33 is greater than the dimension of the central mounting surface 31 along the width direction of the track 10, so that the mover coil 30 forms a cross-sectional profile that is narrower on the side closer to the slider 20 and wider on the side farther from the slider 20. The narrower central mounting surface 31 and the two second inclined surfaces 32 can be adapted to the profile of the lower side of the slider 20, while the wider main body area can expand the arrangeable cross-section of the mover coil 30 without increasing the mounting width of the slider 20.

[0053] This structure distinguishes the mounting area of ​​the mover coil 30 from the main body arrangement area. The inclined area near the slider 20 is used to adapt to the lower contour of the slider 20 and complete the positioning, while the wider area between the two flat sides 33 is used to arrange the main body of the mover coil 30, thereby preventing the mover coil 30 from narrowing along the width of the central mounting surface 31. This allows for more efficient use of the internal space between the slider 20 and the base plate 11, and between the two reinforcing parts 13, while maintaining the necessary movement clearance between the mover coil 30 and the reinforcing parts 13.

[0054] The slider 20 can be entirely housed within the receiving space, or only its lower part can be located within the receiving space, while its upper part protrudes from the track 10 through an opening in the receiving space. When the slider 20 partially protrudes from the receiving space, the protruding portion forms a mounting area that connects with the mounting slide 50, allowing the mounting slide 50 to be fixedly connected to the slider 20 without extending into the receiving space. The lower part of the slider 20 is located between the two side plates 12, forming a rolling guide engagement with the track 10; the upper part of the slider 20 protrudes from the end of the two side plates 12 away from the base plate 11, supporting the mounting slide 50. This structure, while maintaining the main part of the slider 20 embedded within the track 10 and reducing the lateral dimensions of the module, provides a more direct connection position for the mounting slide 50, avoiding the need for a transitional connection structure between the mounting slide 50 and the slider 20 if the slider 20 is completely submerged in the receiving space.

[0055] Specifically, in one embodiment, the linear motor module further includes a mounting slide 50. The mounting slide 50 includes a transverse connecting portion 51 and two end bearing plates 52. The transverse connecting portion 51 extends along the width direction of the track 10, and the two end bearing plates 52 are respectively connected to both ends of the transverse connecting portion 51 in the width direction. The ends of the transverse connecting portion 51 are connected to the middle of the corresponding end bearing plates 52, so that the mounting slide 50 forms an approximately transverse I-shaped structure in a cross-section perpendicular to the length direction of the track 10. The mounting slide 50 can be integrally formed, or it can be formed by separately processing the transverse connecting portion 51 and the end bearing plates 52 and then fixing them together.

[0056] The transverse connecting part 51 has a first side facing the slider 20 and a second side facing away from the slider 20. The first side is fixedly connected to the slider 20, enabling the mounting slide 50 to move synchronously with the slider 20 along the length of the track 10. The transverse connecting part 51 can be installed on the slider 20 by fastening, snap-fitting, or other fixing methods. The transverse connecting part 51 connects the middle of the two end bearing plates 52, enabling the transfer of load between the two end bearing plates 52, while reducing unnecessary solid material in the middle of the mounting slide 50, which helps to reduce the mass and inertia of the moving parts.

[0057] Each end support plate 52 includes a first extension 53 and a second extension 54. The first extension 53 extends from the connection position between the end support plate 52 and the transverse connecting portion 51 toward a first side, and the second extension 54 extends from the connection position toward a second side. The first extension 53 extends the end support plate 52 toward the sides of the slider 20 and the track 10, which can make full use of the space on both sides of the slider 20 in the width direction and avoid the mounting slides 50 being stacked on top of the slider 20, thus increasing the module height. The second extension 54 extends away from the slider 20 and forms a workpiece mounting portion at the end away from the transverse connecting portion 51, so that the workpiece support position is arranged on both sides of the transverse connecting portion 51.

[0058] The two workpiece mounting portions are located at opposite ends of the mounting slide 50 in the width direction, and can jointly support the workpiece to be driven. The load generated by the workpiece is transmitted to the end bearing plate 52 via the second extension 54, and then to the slider 20 via the transverse connecting portion 51. This force path allows the workpiece load to be distributed to both sides of the slider 20 in the width direction, reducing the concentration of load on the middle of the transverse connecting portion 51, and improving the stability of the mounting slide 50 when carrying the workpiece. The first extension 53, the second extension 54, and the transverse connecting portion 51 together constitute a lightweight bearing frame, reducing the bulk volume of the mounting slide 50 while maintaining the workpiece mounting width, which is beneficial to improving the motion response performance of the slider 20.

[0059] In one embodiment, the projection of each end support plate 52 along the height direction of the track 10 at least partially overlaps with at least one first raceway, at least one second raceway 22, or both located on the same side of the slider 20. Projection overlap means that when viewed along the height direction of the track 10, at least a portion of the end support plate 52 intersects with the area of ​​the corresponding raceway, without requiring the end support plate 52 to be in direct contact with the raceway.

[0060] By arranging the end bearing plate 52 and the raceway correspondingly in the height direction of the track 10, the load of the workpiece acting on the end bearing plate 52 can be transferred to the rolling support areas on both sides of the slider 20 along a shorter path. Compared to a structure where the end bearing plate 52 is completely offset from the raceway, this arrangement can reduce the lateral distance between the line of action of the workpiece load and the rolling support position, thereby reducing the overturning moment and local bending moment borne by the slider 20.

[0061] The two end bearing plates 52 correspond to the raceway areas on both sides of the slider 20, so that the loads on both sides of the mounting slide 50 can be borne by the adjacent ball recirculation rows, which helps to balance the force on different ball recirculation rows. This arrangement also allows the workpiece mounting structure, slider 20 and rolling support structure to be compactly aligned in the width direction of the track 10, avoiding the need to increase the width of the mounting slide 50 to adjust the force position.

[0062] In one embodiment, each first extension 53 is spaced apart from the corresponding side plate 12 and at least partially overlaps the corresponding side plate 12 in the height direction of the track 10. The first extension 53 is located in the adjacent area outside or above the side plate 12, forming a gap extending along the length direction of the track 10. This gap prevents the mounting slide 50 from interfering with the fixed side plate 12 when it moves with the slider 20, while also providing external shielding for the ends of the side plate 12 and the sides of the slider 20 by the first extension 53.

[0063] Side sealing strips 23 are provided on both sides of the slider 20 in the width direction. The side sealing strips 23 can be strip-shaped seals arranged along the length direction of the track 10, and can be made of materials with elastic or wear-resistant properties. One end of the side sealing strip 23 is installed on the slider 20 and moves synchronously with the slider 20, and the other end extends toward the end of the corresponding side plate 12 away from the bottom plate 11.

[0064] The side sealing strip 23 is at least partially located within the gap between the first extension 53 and the side plate 12, and slides against the end of the side plate 12 opposite to the bottom plate 11. During the movement of the slider 20, the side sealing strip 23 slides along the end of the side plate 12, forming a dynamic seal in the open area between the slider 20 and the side plate 12 while ensuring smooth movement of the slider 20. This reduces the amount of dust, debris, and other foreign matter entering between the slider 20 and the track 10 from the upper end of the side plate 12, and lowers the possibility of foreign matter entering the first and second raceways 22.

[0065] The overlap of the first extension 53 and the side plate 12 in the height direction requires foreign objects to bypass the first extension 53 and pass through the side sealing strip 23 before entering the raceway area, thus extending the entry path of foreign objects. The first extension 53 can also shield the side sealing strip 23 from the outside, reducing the possibility of the side sealing strip 23 being directly impacted or scratched. The first extension 53, the side plate 12, and the side sealing strip 23 cooperate with each other to form a lateral protection structure that moves with the slider 20 without adding an independent fixed sealing cover, which helps to maintain the cleanliness of the raceway area and the smoothness of ball circulation.

[0066] The side sealing strip 23 can be embedded in the mounting groove on the side of the slider 20 and limited by an interference fit or snap-fit ​​structure. This method has a compact structure and facilitates control over the installation position of the side sealing strip 23. The side sealing strip 23 can be pressed and fixed to the side of the slider 20 by a pressure plate. The pressure plate is connected to the slider 20 by screws. The side sealing strip 23 can be replaced after removing the pressure plate, which is convenient for maintenance. The side sealing strip 23 can be directly fixed to the slider 20 by screws, rivets or other fasteners, or it can be fixed to the side of the slider 20 by adhesive.

[0067] In one embodiment, the track 10 has end baffles 60 at both ends along its length. Each end baffle 60 spans the base plate 11 and the two side plates 12, and is connected to the base plate 11 and the two side plates 12 respectively, so as to at least partially enclose the corresponding end of the accommodating space. The end baffle 60 can be a plate-like piece and can be fixed to the end of the track 10 by screws, locating pins, snap-fit ​​structures or embedding structures.

[0068] The end baffle 60 connects the base plate 11 and the two side plates 12, providing lateral constraint on the end of the track 10, limiting the relative offset of the two side plates 12 in the width direction of the track 10, and improving the overall integrity of the end of the track 10. The end baffle 60 also seals off the end of the receiving space, reducing the entry of foreign objects into the receiving space from the end of the track 10, and minimizing the impact of foreign objects on the stator magnet 40, the mover coil 30, and the rolling support structure.

[0069] The end baffle 60 has a buffer mounting portion on the side facing the receiving space, which is used to mount the anti-collision block 61. The buffer mounting portion can be a protruding mounting seat, a recessed mounting groove, or a connection area with mounting holes. The anti-collision block 61 can be made of rubber, polyurethane, or other materials with elastic cushioning properties, and can be fixed to the buffer mounting portion by embedding, threaded connection, or fasteners.

[0070] The anti-collision block 61 protrudes towards the slider 20 and is located on the moving path of the slider 20 along the length of the track 10. When the slider 20 moves to the end of the track 10, the slider 20 first contacts the anti-collision block 61. The anti-collision block 61 absorbs part of the kinetic energy of the slider 20 through elastic deformation, reducing the rigid impact between the slider 20 and the end baffle 60. This reduces the instantaneous impact load on the end baffle 60, the slider 20 and their connecting parts, and reduces the possibility of the slider 20 exceeding the predetermined moving range.

[0071] In one embodiment, each of the two end baffles 60 has a cover plate 70 mounting portion at its end away from the base plate 11. The two cover plate 70 mounting portions are arranged opposite each other along the length of the track 10 and are used to mount the two ends of the cover plate 70. The cover plate 70 mounting portion can be a support step, mounting groove, positioning boss, or fastening connection area formed on the end baffle 60, used to define the position of the end of the cover plate 70 relative to the track 10.

[0072] The linear motor module also includes a cover plate 70 extending along the length of the track 10. Both ends of the cover plate 70 are fixed to two cover plate 70 mounting portions, at least partially covering the opening of the receiving space. The cover plate 70 can be connected to the cover plate 70 mounting portions by screws, snap-fitting, embedding, or clamping. Since the cover plate 70 mounting portion is located at the end of the end baffle 60 opposite to the base plate 11, the cover plate 70 can shield the interior of the track 10 from the opening of the receiving space, reducing the entry of dust, debris, and other foreign objects into the receiving space through the opening.

[0073] The cover plate 70 is connected to the end baffle 60 only at both ends of the track 10 and remains fixed relative to the track 10, without needing to move with the slider 20 and the mounting slide 50. This avoids the cover plate 70 increasing the mass of the moving parts, while allowing the cover plate 70 to continuously cover the opening of the receiving space along the length of the track 10, thus improving the protective integrity of the internal structure of the track 10.

[0074] The transverse connecting portion 51 and the two end bearing plates 52 together define a clearance space. The clearance space is located on the second side of the transverse connecting portion 51 away from the slider 20 and extends along the length of the track 10. The cover plate 70 passes through the clearance space and is spaced apart from the transverse connecting portion 51 and the two end bearing plates 52, so that the mounting slide 50 can move relative to the fixed cover plate 70 along the length of the track 10.

[0075] When the mounting slide 50 moves, the cover plate 70 passes through the clearance space and does not move synchronously with the mounting slide 50, nor does it mechanically interfere with the mounting slide 50. This structure allows the fixed cover plate 70 and the movable mounting slide 50 to be staggered in the height direction of the track 10, thereby maintaining continuous coverage of the accommodating space while avoiding the cover plate 70 occupying the space on both sides of the width direction of the mounting slide 50.

[0076] The workpiece mounting section has a workpiece mounting surface on the side opposite to the slider 20, and the surface of the cover plate 70 opposite to the slider 20 is located on the workpiece mounting surface near the slider 20. After the workpiece is mounted on the workpiece mounting surface, it can straddle the cover plate 70 and move relative to the cover plate 70 with the mounting slide 50. This height relationship prevents the cover plate 70 from encroaching on the workpiece mounting area and covers the opening of the receiving space without additionally raising the workpiece mounting position.

[0077] In one embodiment, the central mating surface and the central mounting surface constitute a mounting reference for the mover coil along the track height direction, and the two first inclined surfaces and the two second inclined surfaces constitute a centering reference for the mover coil along the track width direction. An adjustable shim of selectable thickness can be provided between the central mating surface and the central mounting surface, and equal-thickness positioning shims are provided between the two first inclined surfaces and their corresponding second inclined surfaces.

[0078] During installation, the central adjustment shim is used to control the installation height of the moving coil and the air gap between it and the stator magnet, while the two side positioning shims are used to limit the displacement of the moving coil along the width of the track, thereby reducing the impact of height adjustment on the lateral position, improving the controllability of the moving coil installation position, and reducing the fluctuation of unilateral magnetic attraction and running resistance caused by uneven air gap.

[0079] In one embodiment, the two ball recirculation columns located on the same side of the slider have different load-bearing directions. The ball recirculation column closer to the base plate forms the main load-bearing component in the direction away from the base plate, which is used to withstand the magnetic attraction load generated by the stator magnet on the mover coil; the ball recirculation column farther from the base plate forms the constraint component in the direction towards the base plate, which is used to limit the slider from lifting under external load or motion impact.

[0080] Furthermore, the first and second raceways closer to the base plate can have a larger load-bearing component in the height direction, while the first and second raceways farther from the base plate can have a larger load-bearing component in the width direction. Thus, the four rows of balls not only provide general linear guidance but can also respectively bear magnetic loads, lateral loads, and overturning loads.

[0081] In one embodiment, each first raceway and its corresponding second raceway have an arc-shaped bearing surface adapted to the outer circumferential surface of the ball. The ball makes rolling contact with the first and second raceways respectively, and a load transfer line passing through the center of the ball is formed between the contact points between the ball and the first raceway and the contact points between the ball and the second raceway. Two ball recirculation rows on the same side of the slider are spaced apart along the track height direction and form load transfer lines in different directions.

[0082] In the ball recirculation row near the base plate, as the load transfer line extends from the first raceway towards the second raceway, it simultaneously slopes away from the base plate. Specifically, the contact point between the first raceway and the ball is located on the side of the ball closest to the side plate and the base plate, while the contact point between the second raceway and the ball is located on the side of the ball closest to the slider and away from the base plate. When the ball is subjected to a compressive load, the second raceway can obtain a supporting component force away from the base plate through the ball, thereby bearing the magnetic attraction load towards the base plate generated by the stator magnet on the mover coil and the slider.

[0083] In the ball recirculation row away from the base plate, the load transfer line extends from the first raceway towards the second raceway while simultaneously tilting towards the base plate. Specifically, the contact point between the first raceway and the ball is located on the side of the ball closer to the side plate and away from the base plate, while the contact point between the second raceway and the ball is located on the side of the ball closer to the slider and closer to the base plate. This ball recirculation row can apply a constraint force towards the base plate to the slider, and provide reverse constraint to the slider when it experiences a lifting tendency due to external loads, acceleration / deceleration inertial forces, or end impacts.

[0084] Furthermore, the load transfer line near the base plate forms a first contact angle with the track width direction, while the load transfer line away from the base plate forms a second contact angle with the track width direction. The first contact angle is larger than the second contact angle. Since a larger contact angle results in a larger component of the load transfer line in the track height direction, the ball recirculation column near the base plate can generate a larger support force in the height direction to primarily bear the magnetic attraction load. The ball recirculation column away from the base plate uses a smaller contact angle, giving it a larger constraint component in the track width direction. This restricts the slider's lifting while improving its resistance to lateral displacement.

[0085] The raceway structures located on both sides of the slider's width direction are symmetrically arranged with respect to the longitudinal center plane of the track. Two rows of balls closer to the base plate provide support forces from both sides of the slider, moving away from the base plate; the width components of these support forces are balanced. Two rows of balls farther from the base plate provide constraint forces from both sides of the slider, moving towards the base plate and towards the center of the track, respectively, thus creating double-sided limiting for the slider.

[0086] The distance between the first and second raceways can be set with a preload based on the ball diameter, ensuring that the balls maintain contact with both the corresponding first and second raceways even without external load. This preload ensures that the ball recirculation rows near and away from the base plate can promptly participate in load bearing when the load direction changes, reducing gap displacement that occurs when the slider transitions from a magnetically attracted load state to a lifting load state.

[0087] In practical use, the stator magnet generates a magnetic attraction force on the mover coil towards the base plate. This magnetic attraction force is transmitted to the slider via the mover coil and is mainly borne by the two rows of balls closest to the base plate. When the mounting slide is subjected to an eccentric workpiece load, the ball recirculation rows distributed on both sides of the slider's width direction and vertically in the height direction can form spaced support points. The ball recirculation rows on the load side and the ball recirculation rows on the opposite side together form a couple that resists the overturning moment, thereby limiting the slider from tilting or rotating relative to the track.

[0088] The aforementioned structure, through different raceway contact positions and contact angles, configures the four rows of balls as the main magnetic attraction bearing rows and the auxiliary constraint bearing rows, ensuring that the bearing direction of each ball circulation row matches the actual magnetic attraction load, lateral load, and overturning load experienced by the linear motor module. Compared to a structure where the four raceways use the same contact angle, this reduces uneven force distribution among the ball rows and insufficient bearing capacity in some ball circulation rows, and improves the slider's attitude stability under combined loads.

[0089] In one embodiment, one end of the cover plate is fixedly connected to one end baffle, and the other end of the cover plate is movably mounted to the other end baffle along the length of the track. The movable end is connected to an elastic tensioning member, which applies a tensioning force to the cover plate along the length of the track.

[0090] When the cover plate changes length due to temperature variations or long-term use, the movable end can compensate for the displacement relative to the end baffle, while the elastic tensioning element maintains the tension of the cover plate. This reduces sagging or arching in the middle of the cover plate and prevents friction between the cover plate and the mounting slide within the clearance space.

[0091] In the description of this specification, the terms "Embodiment 1," "this embodiment," or "in one embodiment," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example; moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in one or more embodiments or examples.

[0092] In the description of this specification, the terms "connection," "installation," "fixing," "setting," and "having" are interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0093] In the description of this specification, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0094] The above description of the embodiments is intended to enable those skilled in the art to understand and apply the technology of this invention. Those skilled in the art can easily make various modifications to these examples and apply the general principles described herein to other embodiments without creative effort. Therefore, this invention is not limited to the above embodiments. Modifications in the following situations should be within the scope of protection of this invention: ① New technical solutions implemented based on the technical solution of this invention and combined with existing common knowledge, where the technical effects of the new technical solution do not exceed the technical effects of this invention; ② Equivalent substitutions of some features of the technical solution of this invention using known technology, resulting in the same technical effects as those of this invention; ③ Extendable technical solutions based on the technical solution of this invention, where the substantive content of the extended technical solution does not exceed the technical solution of this invention; ④ Equivalent transformations made using the content of this specification and drawings, directly or indirectly applied to other related technical fields.

Claims

1. A linear motor module, characterized in that, include: The track includes a base plate and two side plates, the two side plates being respectively disposed on both sides of the base plate in the width direction, the base plate and the two side plates together forming an accommodating space extending along the length direction of the track; The slider is at least partially disposed within the receiving space and is capable of moving along the length of the track; The moving coil is installed on the side of the slider near the base plate; The stator magnet is disposed on the side of the base plate near the slider and is disposed opposite to the mover coil; A reinforcing portion is provided between the base plate and each of the side plates, and each reinforcing portion extends obliquely from the base plate to the corresponding side plate; two reinforcing portions are arranged opposite to each other, and at least a portion of the moving coil is located between the two reinforcing portions; The slider near the base plate includes a central mating surface and two first inclined surfaces located on both sides of the width direction of the central mating surface; the moving coil near the slider includes a central mounting surface opposite to the central mating surface and two second inclined surfaces located on both sides of the width direction of the central mounting surface, the two second inclined surfaces being opposite to the two first inclined surfaces and having a matching profile. The moving coil has two straight side surfaces extending along the height direction of the track on both sides of its width direction. Each straight side surface is connected to the side of the corresponding second inclined surface that is away from the central mounting surface. The two straight side surfaces are respectively arranged opposite to the two reinforcing parts and are spaced apart from the corresponding reinforcing parts. The distance between the two straight side surfaces is greater than the dimension of the central mounting surface along the width direction of the track. The two side plates facing the slider are respectively provided with two first raceways spaced apart along the height direction of the track. The slider is provided with second raceways on both sides in the width direction, which correspond one-to-one with the first raceways. Both the first raceways and the second raceways extend along the length direction of the track. The second raceway has a slot facing the corresponding first raceway. The minimum opening size of the slot is smaller than the diameter of the ball. A plurality of balls are accommodated in the second raceway. A portion of each ball extends out of the second raceway through the slot and rolls into contact with the corresponding first raceway. The slider is provided with a return ball channel that corresponds one-to-one with the second raceway, and both ends of the slider are respectively provided with a turning channel that connects the second raceway and the corresponding return ball channel.

2. The linear motor module according to claim 1, characterized in that, It also includes a mounting slide, which includes a transverse connecting portion extending along the width direction of the track and two end bearing plates respectively disposed at both ends of the transverse connecting portion in the width direction, wherein the two ends of the transverse connecting portion are respectively connected to the middle of the two end bearing plates; The transverse connecting portion has a first side facing the slider and a second side away from the slider, and the first side of the transverse connecting portion is fixedly connected to the slider. Each of the end bearing plates includes a first extension extending from its connection position with the transverse connection portion toward the first side, and a second extension extending toward the second side, wherein each of the second extensions has a workpiece mounting portion at one end away from the transverse connection portion.

3. The linear motor module according to claim 2, characterized in that, The projection of each end bearing plate in the track height direction at least partially overlaps with at least one second raceway and / or first raceway located on the same side of the slider.

4. The linear motor module according to claim 3, characterized in that, Each of the first extensions is spaced apart from the corresponding side plate and at least partially overlaps the corresponding side plate in the track height direction; Side sealing strips are provided on both sides of the slider in the width direction. One end of the side sealing strip is installed on the slider and moves with the slider, and the other end extends towards the end of the corresponding side plate away from the bottom plate. Each of the side sealing strips is at least partially located between the corresponding first extension and the side plate, and slides against the end of the corresponding side plate opposite to the bottom plate.

5. The linear motor module according to any one of claims 2-4, characterized in that, The track is provided with end baffles at both ends along its length. Each end baffle is connected to the bottom plate and the two side plates and at least partially closes the corresponding end of the accommodating space. The end baffle is provided with a buffer mounting part on the side facing the receiving space, and an anti-collision block is installed on the buffer mounting part; the anti-collision block protrudes towards the slider and is located on the moving path of the slider along the length direction of the track.

6. The linear motor module according to claim 5, characterized in that, Each of the two end baffles has a cover plate mounting part at the end furthest from the bottom plate; The linear motor module also includes a cover plate extending along the length of the track, with both ends of the cover plate respectively installed at two cover plate mounting portions, and at least partially covering the opening of the accommodating space; The transverse connecting portion and the two end bearing plates together define a clearance space located on the second side of the transverse connecting portion and extending along the length direction of the track. The cover plate passes through the clearance space and is spaced apart from the mounting slide. The mounting slide can move relative to the cover plate along the length direction of the track. The workpiece mounting portion has a workpiece mounting surface that is away from the slider, and the surface of the cover plate that is away from the slider is located on the side of the workpiece mounting surface closer to the slider.

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