Pin shaping and positioning mechanism

Abstract

The utility model discloses a pin shaping and positioning mechanism which comprises a supporting vertical plate 1, a horizontal guide rail 2 arranged on the supporting vertical plate 1, a main moving seat 3 installed on the horizontal guide rail 2 in a sliding mode and a first driving module 5 arranged on one side of the supporting vertical plate 1 and used for driving the main moving seat 3 to move. A first centering seat 31 used for positioning a material 10 is arranged on the main moving seat 3, and a positioning column 311 used for being inserted into a center hole 100 of the material 10 is arranged on the first centering seat 31; the other side of the supporting vertical plate 1 is provided with a first shaping device 7 which is located below the main moving seat 3 and can ascend to shape pins of the material 10, and the first shaping device 7 is internally provided with a plurality of shaping jigs 71 which are arranged on the pins of the material 10 in a sleeving mode to conduct shaping and positioning; and a pressing positioning device 8 which extends to the upper part of the first shaping device 7 and is matched with the first shaping device 7 to press the material 10 is arranged beside the supporting vertical plate 1.

Description

Technical field:

[0001] The utility model relates to the technical field of automated production, in particular to a pin shaping and positioning mechanism. Background technology:

[0002] Industrial automation refers to the use of automation technology and system control to automate every step of the manufacturing process (such as material handling, processing, assembly, testing, and packaging) with minimal human intervention. Its core goals are to improve production efficiency, ensure consistent product quality, reduce production costs, and minimize human error.

[0003] Currently, in the electronics processing and production industry, in order to improve production efficiency and reduce labor costs, most electronic components are produced and assembled using automated equipment. For example, small transformers are commonly used in mobile phones, computers and other electronic products. Since electronic components usually have multiple pins for welding or positioning, and during the production process, the transportation and assembly processes will inevitably cause pin shifting, so the pins need to be shaped before the product is discharged or welded to ensure the product's pin position is accurate and convenient for subsequent assembly and welding. For example: China Patent Authorization Announcement No. CN 221087087 U is a transformer pin first shaping device. In the technical solution disclosed in the patent, the transformer body 4 is inserted into the interior of the plug box 31, and then the third hydraulic cylinder 32 pushes the clamping plate 33 to clamp the transformer body 4. Then the first hydraulic cylinder 1 pushes the plug box 31 downward, so that the transformer body 4 inside the plug box 31 is inserted into the shaping box 5, so that the pins 13 of the transformer body 4 are respectively inserted into the interior of the first shaping sleeve 7, the second shaping sleeve 8, the third shaping sleeve 9, the fourth shaping sleeve 10 and the fifth shaping sleeve 11. Then the fourth hydraulic cylinder 144 pushes the whole The shaping block 143 is clamped on the surface of the pin 13, and then the second hydraulic cylinder 12 is reset. The second hydraulic cylinder 12 drives the ring 141 and the shaping block 143 to move from top to bottom inside the first shaping sleeve 7, the second shaping sleeve 8, the third shaping sleeve 9, the fourth shaping sleeve 10 and the fifth shaping sleeve 11, and the shaping block 143 shapes the pin 13 during the movement. After the shaping work is completed, the fourth hydraulic cylinder 144, the second hydraulic cylinder 12, the first hydraulic cylinder 1 and the third hydraulic cylinder 32 are reset in sequence, and finally the transformer body 4 can be taken out from the inside of the plug-in box 31.

[0004] Although the above patent solution can solve the problem of replacing manual work to reshape the pins of electronic components, it still requires manual cooperation to load and unload the products. In addition, the shaping mechanism has a complex structure and is an independent device that cannot cooperate with other process equipment for automated production operations. Therefore, it is impossible to quickly perform automated shaping operations and it is difficult to meet the current market needs.

[0005] In view of this, the inventors propose the following technical solutions. Utility model content:

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a stitch shaping and positioning mechanism.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: the stitch shaping and positioning mechanism includes: a supporting vertical plate, a horizontal guide rail arranged on the supporting vertical plate, a main movable seat slidably installed on the horizontal guide rail, and a first driving module arranged on one side of the supporting vertical plate and used to drive the main movable seat to move. The main movable seat is provided with a first centering seat for positioning the material, and the first centering seat is provided with a positioning column for inserting into the center hole of the material; the other side of the supporting vertical plate is provided with a first shaping device located below the main moving seat and capable of rising to shape the stitches of the material, the first shaping device is provided with a plurality of shaping jigs that are sleeved on the stitches of the material for shaping and positioning; the side of the supporting vertical plate is provided with a downward pressing positioning device that extends to the top of the first shaping device and cooperates to press the material.

[0008] Furthermore, in the above technical solution, a conical hole is provided on the top of the shaping jig, through which the offset pins can be swung back to the normal position to achieve shaping.

[0009] Furthermore, in the above technical solution, the first shaping device includes a first vertical guide rail vertically arranged on the side wall of the supporting plate and perpendicular to the horizontal guide rail, a lifting seat slidably installed on the first vertical guide rail and used to drive the shaping jig to move up and down, and a second driving module arranged beside the first vertical guide rail and used to drive the lifting seat to move, wherein a plurality of shaping jigs are installed on the lifting seat, and the distribution of the shaping jigs is consistent with the stitches on the material.

[0010] Furthermore, in the above technical solution, the main movable seat and the first centering seat are provided with a plurality of through holes for the shaping jig to pass through, and the downward positioning device and the first shaping device are located on the same vertical line and are respectively located on both sides of the main movable seat.

[0011] Furthermore, in the above technical solution, a slave movable seat is also provided on the horizontal guide rail, and a second centering seat with the same structure as the first centering seat and used to position the material is provided on the slave movable seat; a second shaping device for shaping the material stitches is provided next to the first shaping device, and a positioning pressure plate capable of simultaneously pressing the materials on the first centering seat and the second centering seat is provided in the downward positioning device.

[0012] Furthermore, in the above technical solution, a connecting rod is provided between the slave movable seat and the main movable seat, the connecting rod passes through the main movable seat, and the main movable seat can slide relative to the connecting rod; one end of the connecting rod is fixed to the slave movable seat, and the other end of the connecting rod is provided with a limiting head to prevent separation from the main movable seat.

[0013] Furthermore, in the above technical solution, a magnet block is provided on the main movable seat or the slave movable seat, and the magnet block is used to adsorb, position and link the main movable seat and the slave movable seat when they are in contact; and a first limit block and a second limit block are respectively provided at both ends of the horizontal guide rail for stopping the main movable seat and the slave movable seat.

[0014] Furthermore, in the above technical solution, the main movable seat or the slave movable seat is provided with a buffer to prevent hard contact, and the main movable seat or the slave movable seat is also provided with an adjusting bolt for adjusting the distance between the two. The adjusting bolt corresponds to the magnet block and is respectively located on the main movable seat and the slave movable seat.

[0015] Furthermore, in the above technical solution, the downward-pressing positioning device includes a vertical plate located beside the supporting plate, a second vertical guide rail arranged on the vertical plate, a cantilever sliding seat installed on the second vertical guide rail and extending above the horizontal guide rail, and a third driving module arranged beside the second vertical guide rail and used to drive the cantilever sliding seat to move up and down, wherein the positioning pressure plate is installed at the end of the cantilever sliding seat and is directly above the main moving seat and the slave moving seat.

[0016] Furthermore, in the above technical solution, the first driving module includes a pulley group arranged on one side of the supporting vertical plate and distributed parallel to the horizontal guide rail, and a first motor for driving the pulley group to work, wherein the pulley group is provided with a connecting component connected to the main moving seat; the pulley group is provided with a first stop sensor at at least one end, and the connecting component is provided with a first sensor plate for matching with the first stop sensor.

[0017] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0018] 1. In the utility model, a first centering seat is provided on the main movable seat to receive the material, and the positioning column on the first centering seat is inserted into the center hole of the material to realize centering positioning, and then the first driving module pushes the main movable seat to move along the horizontal guide rail to realize the transfer of the material. The first shaping device is used to shape and position the pins of the material during the transfer process of the material, and the downward positioning device is used to press the material tightly on the first centering seat, thereby realizing the shaping of the pins of the material during the transfer process of the material. This not only greatly improves the shaping efficiency, but also can be quickly connected to the automatic production line to realize full-line automated production and greatly improve the product production capacity.

[0019] 2. In the present invention, a connecting rod passes through the main moving seat and is fixed to the slave moving seat, and a limiting head is provided at the end of the connecting rod to limit the main moving seat. When the first driving module drives the main moving seat to move closer to the slave moving seat, the main moving seat will contact the slave moving seat and push the slave moving seat to move synchronously along the guide rail to one end. When the first driving module drives the main moving seat to drive the slave moving seat to move to the other end, after the main moving seat contacts the limiting head, the slave moving seat will be pulled by the connecting rod to move synchronously along the guide rail to the other end. When the main moving seat reaches the other end When the end is reached, the limit head will first contact the first limit block to stop the slave moving seat. At this time, the main moving seat and the slave moving seat are in a separated state, so that the main moving seat and the slave moving seat are close together at one end of the guide rail, and the main moving seat and the slave moving seat are separated and kept at a distance at the other end of the guide rail, which is convenient for loading materials one by one at the guide loading position and taking away two materials at intervals and synchronously at the taking position. There is no need to wait for materials and multi-power feeding. The connecting rod structure is used to realize automatic adjustment of the spacing and fast feeding, which greatly reduces costs and improves production efficiency. Description of the drawings:

[0020] Figure 1 It is a three-dimensional diagram of the utility model;

[0021] Figure 2 It is a structural diagram of the first shaping device in the utility model;

[0022] Figure 3 It is a three-dimensional diagram of the middle and lower pressure positioning device of the utility model;

[0023] Figure 4 It is a three-dimensional diagram of the first driving module in the present utility model;

[0024] Figure 5 It is the internal structure diagram of the utility model. Specific implementation method:

[0025] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0026] See Figure 1 and Figure 5As shown, a stitch shaping and positioning mechanism includes: a supporting plate 1, a horizontal guide rail 2 arranged on the supporting plate 1, a main moving seat 3 slidably mounted on the horizontal guide rail 2, and a first driving module 5 arranged on one side of the supporting plate 1 and used to drive the main moving seat 3 to move, the main moving seat 3 is provided with a first centering seat 31 for positioning the material 10, and the first centering seat 31 is provided with a positioning column 311 for inserting into the center hole 100 of the material 10; the other side of the supporting plate 1 is provided with a first shaping device 7 located below the main moving seat 3 and capable of rising to shape the stitches of the material 10, the first shaping device 7 is provided with a plurality of shaping jigs 71 that are sleeved on the stitches of the material 10 for shaping and positioning; the side of the supporting plate 1 is provided with a downward pressing positioning device 8 that extends to the top of the first shaping device 7 and cooperates to press the material 10. A first centering seat 31 is set on the main moving seat 3 to receive the material 10, and the positioning column 311 on the first centering seat 31 is inserted into the center hole of the material 10 to realize centering positioning, and then the first driving module 5 pushes the main moving seat 3 to move along the horizontal guide rail 2 to realize the transfer of the material 10, and the first shaping device 7 is used to shape and position the pins of the material 10 during the transfer process of the material 10, and the downward positioning device 8 is used to cooperate to press the material 10 on the first centering seat 31, so as to realize the shaping of the pins of the material 10 during the transfer process of the material 10, which not only greatly improves the shaping efficiency, but also can be quickly connected to the automatic production line to realize full-line automated production, thereby greatly improving the product production capacity.

[0027] The top of the shaping jig 71 is provided with a tapered hole 711, through which the offset pins can be swung back to the right position to achieve shaping.

[0028] The first shaping device 7 includes a first vertical guide rail 74 vertically mounted on the side wall of the support plate 1 and perpendicular to the horizontal guide rail 2, a lifting base 72 slidably mounted on the first vertical guide rail 74 and used to drive the shaping jig 71 to move up and down, and a second driving module 73 disposed beside the first vertical guide rail 74 and used to drive the lifting base 72 to move. The lifting base 72 is mounted with multiple shaping jigs 71, and the distribution of the shaping jigs 71 is consistent with the stitches on the material 10. The second driving module 73 is a cylinder.

[0029] The main movable seat 3 and the first centering seat 31 are provided with a plurality of through holes 30 for the shaping jig 71 to pass through. The downward pressing positioning device 8 and the first shaping device 7 are located on the same vertical line and are respectively located on both sides of the main movable seat 3.

[0030] The horizontal guide rail 2 is also provided with a movable seat 4, which is provided with a second centering seat 41 with the same structure as the first centering seat 31 and used to position the material 10; the first shaping device 7 is provided next to a second shaping device 9 for shaping the stitches of the material 10, and the downward positioning device 8 is provided with a positioning pressure plate 84 that can simultaneously press the material 10 on the first centering seat 31 and the second centering seat 41.

[0031] A connecting rod 6 is provided between the slave movable seat 4 and the main movable seat 3. The connecting rod 6 passes through the main movable seat 3, and the main movable seat 3 can slide relative to the connecting rod 6. One end of the connecting rod 6 is fixed to the slave movable seat 4, and the other end of the connecting rod 6 is provided with a limiting head 61 to prevent it from being separated from the main movable seat 3. The main movable seat 3 is limited by fixing the connecting rod 6 to the slave movable seat 4 after passing through the main movable seat 3 and providing a limiting head 61 at the end of the connecting rod 6. When the first driving module 5 drives the main movable seat 3 to move closer to the slave movable seat 4, the main movable seat 3 will contact the slave movable seat 4 and push the slave movable seat 4 to move synchronously along the guide rail 2 to one end. When the first driving module 5 drives the main movable seat 3 to drive the slave movable seat 4 to move to the other end, after the main movable seat 3 contacts the limiting head 61, the slave movable seat 4 will be pulled by the connecting rod 6 to move synchronously along the guide rail 2 to the other end. When the main movable seat 3 reaches the other end When the limit head 61 contacts the first limit block 21 first, the slave movable seat 4 stops moving. At this time, the main movable seat 3 and the slave movable seat 4 are in a separated state, so that the main movable seat 3 and the slave movable seat 4 are close together at one end of the guide rail 2, and the main movable seat 3 and the slave movable seat 4 are separated and kept at a certain distance at the other end of the guide rail 2, which is convenient for loading materials 10 one by one at the loading position and taking away two materials 10 at intervals and synchronously at the taking position. There is no need to wait for materials and multi-power feeding. The connecting rod 6 structure is used to realize automatic adjustment of the spacing and fast feeding, which greatly reduces costs and improves production efficiency.

[0032] The main movable seat 3 or the slave movable seat 4 is provided with a magnet block C, which attracts and positions the main movable seat 3 and the slave movable seat 4 when they come into contact. The ends of the horizontal guide rail 2 are respectively provided with a first stop block 21 and a second stop block 22 for stopping the main movable seat 3 and the slave movable seat 4. A buffer member A is provided on the main movable seat 3 or the slave movable seat 4 to prevent hard contact. Adjustment bolts B are also provided on the main movable seat 3 or the slave movable seat 4 to adjust the distance between the two. The adjustment bolts B correspond to the magnet blocks C and are located on the main movable seat 3 and the slave movable seat 4, respectively. In this embodiment, the magnet block C is located in the main movable seat 3, and the adjusting bolt B is installed on the slave movable seat 4. By arranging the magnet block C on the main movable seat 3, when the main movable seat 3 contacts the slave movable seat 4, the main movable seat 3 will be adsorbed and fixed with the slave movable seat 4 to maintain linkage, so that the main movable seat 3 can move back and forth closely and synchronously, and the adjusting bolt B is arranged on the slave movable seat 4 to cooperate with the magnet block C for adsorption and fixation. Therefore, the distance between the main movable seat 3 and the slave movable seat 4 after they are brought together can be changed by adjusting the protruding length of the adjusting bolt B, thereby realizing the transmission of different products and improving the versatility of the mechanism.

[0033] The magnet block C, adjustment bolt B, and buffer member A are each provided with two, and are symmetrically located on both sides of the connecting rod 6. In this embodiment, the buffer member A is a collision avoidance column and is installed on the end of the slave movable base 4 that contacts the main movable base 3. Two are symmetrically arranged on both sides of the connecting rod 6 to ensure stability when the main movable base 3 contacts the buffer member A.

[0034] The downward positioning device 8 includes a vertical plate 81 located beside the supporting plate 1, a second vertical guide rail 82 provided on the vertical plate 81, a cantilevered sliding seat 83 installed on the second vertical guide rail 82 and extending above the horizontal guide rail 2, and a third driving module 84 provided beside the second vertical guide rail 82 and used to drive the cantilevered sliding seat 83 to move up and down. The positioning pressure plate 84 is installed at the end of the cantilevered sliding seat 83 and is located directly above the main movable seat 3 and the slave movable seat 4. The third driving module 84 is a cylinder.

[0035] The first driving module 5 includes a pulley group 51 arranged on one side of the supporting vertical plate 1 and distributed parallel to the horizontal guide rail 2, and a first motor 52 for driving the pulley group 51 to work, wherein the pulley group 51 is provided with a connecting component 53 connected to the main moving seat 3; the pulley group 51 is provided with a first stop sensor 54 at least at one end, and the connecting component 53 is provided with a first sensor plate 55 for matching with the first stop sensor 54.

[0036] In summary, when the present invention is working, the first driving module 5 pushes the main moving seat 3 to move along the guide rail 2. When the main moving seat 3 contacts the slave moving seat 4, the main moving seat 3 and the slave moving seat 4 are fixedly connected together by the magnet block C, so that the main moving seat 3 can drive the slave moving seat 4 to move synchronously; further, the first driving module 5 pushes the main moving seat 3 to drive the slave moving seat 4 to move to the material receiving station along the guide rail 2 to one end, and stops after the slave moving seat 4 contacts the second limit block 22, thereby achieving precise positioning; further, wait until the main moving seat 3 and the slave moving seat After the loading is completed, the first driving module 5 pushes the main moving seat 3 to move in the opposite direction. Under the action of the magnet block C, the main moving seat 3 drives the slave moving seat 4 to move synchronously along the guide rail 2 to the other end. Further, when the main moving seat 3 and the slave moving seat 4 reach above the first shaping device 7 and the second shaping device 9 respectively, the first driving module 5 stops working first, and the downward positioning device 8 presses and fixes the materials 10 on the main moving seat 3 and the slave moving seat 4. Then, the first shaping device 7 and the second shaping device 9 drive the materials on the first centering seat 31 and the second centering seat 41 respectively. The material 10 is subjected to a stitch shaping operation, and the tapered hole 711 of the shaping jig 71 is sleeved onto the stitch to correct the offset stitch. Further, after completing the stitch shaping operation, the first driving module 5 continues to push the main movable seat 3 and the slave movable seat 4 to move toward the other end. When the main movable seat 3 and the slave movable seat 4 reach the other end, the limiting head 61 of the connecting rod 6 will first contact the second limiting block 22, so that the slave movable seat 4 can no longer move forward. Under the action of the first driving module 5 continuing to push the main movable seat 3 to move, the main movable seat 3 breaks away from the magnet block C. The adsorption force between the main moving seat 3 and the slave moving seat 4 is exerted, thereby separating and continuing to move toward the first limit block 21. At this time, the distance between the main moving seat 3 and the slave moving seat 4 changes as the first driving module 5 pushes the main moving seat 3 to move, and finally the main moving seat 3 and the dynamic slave moving seat 4 are close to each other for loading at one end of the guide rail 2, and separated and fed at the other end of the guide rail, and the distance between the main moving seat 3 and the dynamic slave moving seat 4 can be adjusted by the first driving module 5 within the length range of the connecting rod 6; finally, the material 10 on the main moving seat 3 and the slave moving seat 4 is taken away by the material-retrieving robot.

[0037] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made based on the structure, features and principles described in the scope of the patent application of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A stitch shaping and positioning mechanism, comprising: A support vertical plate (1), a horizontal guide rail (2) arranged on the support vertical plate (1), a main movable seat (3) slidably mounted on the horizontal guide rail (2), and a first driving module (5) arranged on one side of the support vertical plate (1) and used to drive the main movable seat (3) to move, characterized in that: A first centering seat (31) for positioning the material (10) is provided on the main moving seat (3), and a positioning column (311) for inserting into the center hole (100) of the material (10) is provided on the first centering seat (31); A first shaping device (7) is provided on the other side of the supporting vertical plate (1), which is located below the main movable seat (3) and can rise to shape the pins of the material (10). The first shaping device (7) is provided with a plurality of shaping jigs (71) that are sleeved on the pins of the material (10) to shape and position the pins. A downward pressing positioning device (8) is provided on the side of the supporting vertical plate (1) and extends to the top of the first shaping device (7) and cooperates with the pressing material (10).

2. The stitch shaping and positioning mechanism according to claim 1, characterized in that: The top of the shaping jig (71) is provided with a tapered hole (711), through which the offset pins can be swung back to the normal position to achieve shaping.

3. The stitch shaping and positioning mechanism according to claim 2, characterized in that: The first shaping device (7) includes a first vertical guide rail (74) vertically arranged on the side wall of the supporting vertical plate (1) and perpendicular to the horizontal guide rail (2), a lifting seat (72) slidably installed on the first vertical guide rail (74) and used to drive the shaping jig (71) to move up and down, and a second driving module (73) arranged beside the first vertical guide rail (74) and used to drive the lifting seat (72) to move, wherein a plurality of shaping jigs (71) are installed on the lifting seat (72), and the distribution of the shaping jigs (71) is consistent with the stitches on the material (10).

4. The stitch shaping and positioning mechanism according to claim 3, characterized in that: The main movable seat (3) and the first centering seat (31) are provided with a plurality of through holes (30) for the shaping jig (71) to pass through. The downward pressing positioning device (8) and the first shaping device (7) are located on the same vertical straight line and are respectively located on both sides of the main movable seat (3).

5. The stitch shaping and positioning mechanism according to any one of claims 1 to 4, characterized in that: The horizontal guide rail (2) is also provided with a movable seat (4), and the movable seat (4) is provided with a second centering seat (41) having the same structure as the first centering seat (31) and used for positioning the material (10); a second shaping device (9) for shaping the stitches of the material (10) is provided next to the first shaping device (7), and a positioning pressure plate (84) capable of simultaneously pressing the material (10) on the first centering seat (31) and the second centering seat (41) is provided in the downward positioning device (8).

6. The stitch shaping and positioning mechanism according to claim 5, characterized in that: A connecting rod (6) is provided between the slave movable seat (4) and the main movable seat (3), the connecting rod (6) passes through the main movable seat (3), and the main movable seat (3) can slide relative to the connecting rod (6); one end of the connecting rod (6) is fixed to the slave movable seat (4), and the other end of the connecting rod (6) is provided with a limiting head (61) for preventing separation from the main movable seat (3).

7. The stitch shaping and positioning mechanism according to claim 6, characterized in that: The main movable seat (3) or the slave movable seat (4) is provided with a magnet block (C), and when the main movable seat (3) and the slave movable seat (4) are in contact, the magnet block (C) is used to attract and position the main movable seat (3) and the slave movable seat (4). The two ends of the horizontal guide rail (2) are respectively provided with a first limit block (21) and a second limit block (22) for stopping the main movable seat (3) and the slave movable seat (4).

8. The stitch shaping and positioning mechanism according to claim 7, characterized in that: The main movable seat (3) or the slave movable seat (4) is provided with a buffer (A) for preventing hard contact, and the main movable seat (3) or the slave movable seat (4) is also provided with an adjusting bolt (B) for adjusting the distance between the two. The adjusting bolt (B) corresponds to the magnet block (C) and is respectively located on the main movable seat (3) and the slave movable seat (4).

9. The stitch shaping and positioning mechanism according to claim 5, characterized in that: The downward positioning device (8) includes a vertical plate (81) located beside the supporting plate (1), a second vertical guide rail (82) arranged on the vertical plate (81), a cantilever sliding seat (83) installed on the second vertical guide rail (82) and extending above the horizontal guide rail (2), and a third driving module (84) arranged beside the second vertical guide rail (82) and used to drive the cantilever sliding seat (83) to move up and down, wherein the positioning pressure plate (84) is installed at the end of the cantilever sliding seat (83) and is located directly above the main moving seat (3) and the slave moving seat (4).

10. The stitch shaping and positioning mechanism according to any one of claims 6 to 9, characterized in that: The first driving module (5) comprises a pulley group (51) arranged on one side of the supporting vertical plate (1) and distributed parallel to the horizontal guide rail (2), and a first motor (52) for driving the pulley group (51) to work, wherein a connecting component (53) is provided on the pulley group (51) and connected to the main movable seat (3); a first stop sensor (54) is provided at at least one end of the pulley group (51), and a first sensing piece (55) for matching with the first stop sensor (54) is provided on the connecting component (53).

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