Manufacturing method of elastic pressing movable fine positioning mechanism

Abstract

The application discloses a manufacturing method of a spring-pressing movable precise positioning mechanism, and relates to the technical field of decoration strip machining, in particular to a spring-pressing movable precise positioning mechanism manufacturing method, which comprises the following steps: installing a positioning column in a corresponding positioning hole of a bearing table according to the size of a decoration strip to be machined and the position of a hole on the decoration strip; preliminarily positioning the decoration strip on the bearing table through the positioning column; pressing a protruding block to make the bearing table drive the decoration strip to move downwards; fixing the position of the bearing table moving downwards through a limiting mechanism; driving two clamping plates to move relatively through a driving assembly; precisely fixing the decoration strip by using the relative clamping force of the clamping plates and the limitation of the positioning column and a groove; avoiding the decoration strip from moving during machining; improving the positioning precision of the decoration strip; and resetting the machined decoration strip by using the spring-pressing limiting mechanism, thereby improving the convenience of taking the decoration strip.

Description

Technical Field

[0001] This invention belongs to the field of automotive interior parts manufacturing technology, specifically relating to a method for manufacturing a spring-loaded movable precision positioning mechanism. Background Technology

[0002] With the development of new energy vehicles, people are also gradually increasing their expectations for the functionality of automotive interior parts. Automotive interior parts include interior panels, steering wheels, interior trim strips, etc. In order to improve the production quality of interior parts, positioning mechanisms are needed to clamp and position the formed interior parts to facilitate further processing and make the finished interior parts have a smooth and flat appearance.

[0003] Currently, positioning mechanisms used in the production of automotive interior parts typically employ limiting grooves for positioning. However, in the production of interior trim strips, the positioning effect of using positioning grooves is poor due to the irregular shape of the trim strips. During production, the trim strips are prone to misalignment, which affects the processing accuracy. Therefore, we need to propose a method for manufacturing a spring-loaded movable precision positioning mechanism to solve the above-mentioned problems and effectively improve the positioning accuracy of irregular interior trim strips. Summary of the Invention

[0004] The purpose of this invention is to provide a method for manufacturing a spring-loaded movable precision positioning mechanism. By utilizing the relative clamping force of the clamping plates and the limitation of the positioning post and groove, the decorative strip is precisely fixed, preventing displacement of the decorative strip during processing and improving the positioning accuracy of the decorative strip. Furthermore, the spring-loaded limiting mechanism can reset the processed decorative strip, improving the convenience of removing the decorative strip, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method for manufacturing a spring-loaded movable precision positioning mechanism includes the following steps:

[0007] S1. Prepare a fixing base with a groove at the top, and make notches on the opposite sides of the fixing base;

[0008] S2. Assemble four spring-loaded limiting mechanisms and open clearance slots inside the fixed base for the installation of the limiting mechanisms;

[0009] S3. Multiple positioning holes are made in a rectangular array on the support platform, and protrusions corresponding to the notches are fixed on the opposite sides of the support platform;

[0010] S4. By cooperating with the protrusions and notches, install the four limiting mechanisms in the clearance slots, then connect the upper end of the limiting mechanism to the support platform, and install the support platform in the groove of the fixed seat.

[0011] S5. Connect the two clamps to the drive assembly, and then install the drive assembly on the fixed base, so that one end of the clamp is located inside the other two sides of the fixed base.

[0012] S6. Based on the shape of the decorative strip and the position of the holes in the decorative strip, install the positioning pins into the corresponding positioning holes to obtain the finished positioning mechanism;

[0013] S7. Debug the finished positioning mechanism: When the bearing platform is not limited by the limiting mechanism, one end of the bearing platform and the clamping plate are flush; when the bearing platform is limited by the limiting mechanism, the clamping plate is above the bearing platform.

[0014] S8. Use decorative strips to verify the clamping of the positioning mechanism. Drive the two clamping plates to move relative to each other through the drive component. Utilize the relative clamping force of the two clamping plates, the positioning post and the groove to restrict the decorative strips to be accurately clamped and fixed.

[0015] Preferably, the four limiting mechanisms are located at the four corners of the lower surface of the support platform, and the grooves are connected to the clearance slots. The grooves are provided with clearance holes on opposite sides for the clamping plates to pass through.

[0016] Preferably, the limiting mechanism includes a fixing block, a connecting block, and a limiting block. The fixing block is fixed to the lower surface of the support platform, the connecting block is fixed to one end of the clearance slot near the groove, and the limiting block is fixed below the connecting block. A spring is installed between the fixing block and the connecting block. A limiting hook is hinged to the lower end of the fixing block, and a limiting track is provided on one side of the limiting block for the limiting hook track to move.

[0017] Preferably, the limiting track includes a straight rail portion, a limiting notch portion, and two symmetrically arranged buffer portions. The straight rail portion and the limiting notch portion are located at both ends of the two buffer portions. Through the annular track of the two buffer portions and the limiting notch portion, the bearing platform is pressed by the protrusion, causing the bearing platform to drive the limiting hook to move within the limiting track. The annular track makes it easy to lock and unlock the position of the bearing platform.

[0018] Preferably, when the limiting mechanism is not in the limiting position, the limiting hook is located at the end of the straight rail section away from the buffer section. When the limiting mechanism is in the limiting position, the limiting hook enters the interior of the limiting recess section along one of the buffer sections. Through the connection between the limiting hook and the limiting recess section, the pull support platform is moved into the bottom of the groove, so that the clamping plate is located above the support platform. When the limiting mechanism is unlocked, the limiting hook moves from the limiting recess section into another buffer section, and then from the buffer section into the straight rail section, completing the reset of the support platform. At this time, the clamping plate is flush with the support platform.

[0019] Preferably, the lower end of the fixing block is fixed with a hinge seat, one end of the limiting hook is L-shaped, and the other end of the limiting hook is provided with a hanging ring that is connected to the hinge seat.

[0020] Preferably, the positioning post includes a positioning part and a threaded part, the side wall of the positioning hole is provided with an internal thread for the threaded part to be screwed in, the positioning part is fixed to the upper end of the threaded part, and the upper end of the positioning part is arc-shaped.

[0021] Preferably, the lower end of the fixed base is fixed with two support bases. Each support base includes a vertical part, a support part, and a connecting part. The support part is fixed on the lower surface of the fixed base, and the connecting part is fixed between the support part and the vertical part. One end of the driving assembly is connected to the vertical part.

[0022] Preferably, the drive assembly includes a bidirectional screw and a motor. The lower surface of the fixed base has a mounting groove for mounting the motor. The bidirectional screw is rotatably mounted between two vertical parts and passes through the fixed base. The clamping plate is set as an L-shaped plate. The two clamping plates are threadedly connected to the bidirectional screw. Two guide rods are fixed between the two vertical parts. Both guide rods are inserted into the clamping plate. The output shaft of the motor and the bidirectional screw are connected by a transmission mechanism.

[0023] Preferably, the drive assembly includes three electric push rods, which are fixed at equal intervals on one side of the vertical part, and three electric push rods are installed on each of the two vertical parts. The clamping plate is configured as a straight plate, and the piston rod ends of the three electric push rods are all connected to one end of the straight plate.

[0024] The method for manufacturing a spring-loaded movable precision positioning mechanism proposed in this invention has the following advantages compared with the prior art:

[0025] 1. This invention provides a positioning mechanism consisting of a fixed base, a spring-loaded limiting mechanism, a support platform, positioning posts, clamping plates, and a drive assembly. During the processing of decorative strips, positioning posts are installed in corresponding positioning holes on the support platform according to the size of the decorative strip and the position of the holes on it. The positioning posts initially position the decorative strip on the support platform. Then, pressing the protrusion causes the support platform to move the decorative strip downwards. The limiting mechanism then fixes the downward position of the support platform. The drive assembly then moves the two clamping plates relative to each other. Utilizing the relative clamping force of the clamping plates, as well as the constraints of the positioning posts and grooves, the decorative strip is precisely fixed, preventing displacement during processing and improving positioning accuracy. Furthermore, the spring-loaded limiting mechanism allows for the reset of the processed decorative strip, improving the convenience of removing the strip.

[0026] 2. The present invention facilitates the installation of a corresponding number of positioning columns according to different decorative strips by detachably connecting the support platform and the positioning columns, so that the installed positioning columns can be used to fix decorative strips of different shapes, thereby improving the versatility of the positioning mechanism. Attached Figure Description

[0027] Figure 1 A schematic diagram of the finished positioning mechanism prepared using the method provided by the present invention;

[0028] Figure 2 This is a schematic diagram of the exploded structure of the positioning mechanism of the present invention;

[0029] Figure 3 This is an exploded view of the limiting mechanism of the present invention;

[0030] Figure 4 This is a schematic diagram of the positioning mechanism of the present invention when the finished product is clamped.

[0031] Figure 5 This is a schematic diagram of the finished structure of the positioning mechanism according to Embodiment 2 of the present invention;

[0032] Figure 6 This is a schematic diagram of the exploded structure of the positioning mechanism in Embodiment 2 of the present invention.

[0033] In the diagram: 1. Fixed base; 2. Clamping plate; 21. L-shaped plate; 22. Straight plate; 3. Drive assembly; 31. Bidirectional screw; 32. Guide rod; 33. First bevel gear; 34. Second bevel gear; 35. Motor; 36. Mounting slot; 37. Electric push rod; 4. Support base; 401. Vertical part; 402. Support part; 403. Connecting part; 5. Bearing platform; 6. Positioning column; 7. Protrusion; 8. Positioning hole; 9. Clearance hole; 10. Notch; 11. Limiting mechanism; 111. Fixed block; 112. Hinge base; 113. Limiting hook; 114. Spring; 115. Connecting block; 116. Limiting block; 117. Limiting track; 1171. Straight rail part; 1172. Buffer part; 1173. Limiting notch part. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1

[0036] This invention provides, for example Figure 1-4 The method for manufacturing a spring-loaded movable precision positioning mechanism includes the following steps:

[0037] S1. Prepare a fixing seat 1 with a groove at the top, and make notches 10 on the opposite sides of the fixing seat 1;

[0038] S2. Assemble four spring-loaded limiting mechanisms 11, and provide clearance slots for the installation of the limiting mechanisms 11 inside the fixed base 1; the four limiting mechanisms 11 are located at the four corners of the lower surface of the support platform 5, and the grooves are connected to the clearance slots. The opposite sides of the grooves are provided with clearance holes 9 for the clamping plate 2 to pass through, which facilitates the installation of the limiting mechanisms 11.

[0039] S3. Multiple positioning holes 8 are made in a rectangular array on the support platform 5, and protrusions 7 corresponding to notches 10 are fixed on the opposite sides of the support platform 5.

[0040] S4. By cooperating with the protrusion 7 and the notch 10, four limiting mechanisms 11 are installed in the clearance slots, the upper end of the limiting mechanism 11 is connected to the support platform 5, and the support platform 5 is installed in the groove of the fixed seat 1.

[0041] S5. Connect the two clamping plates 2 to the drive assembly 3, and then install the drive assembly 3 on the fixed base 1, so that one end of the clamping plate 2 is located inside the other two sides of the fixed base 1.

[0042] S6. Based on the shape of the decorative strip and the position of the holes in the decorative strip, install the positioning pin 6 in the corresponding positioning hole 8 with internal thread to obtain the finished positioning mechanism;

[0043] The limiting mechanism 11 includes a fixing block 111, a connecting block 115, and a limiting block 116. The fixing block 111 is fixed to the lower surface of the support platform 5. The connecting block 115 is fixed to one end of the clearance slot near the groove. The limiting block 116 is fixed below the connecting block 115. A spring 114 is installed between the fixing block 111 and the connecting block 115. A limiting hook 113 is hinged to the lower end of the fixing block 111. A limiting track 117 is provided on one side of the limiting block 116 to allow the limiting hook 113 to move along the limiting track 117, so that the processed decorative strip can be reset and the convenience of picking up the decorative strip can be improved.

[0044] The limiting track 117 includes a straight rail portion 1171, a limiting notch portion 1173, and two symmetrically arranged buffer portions 1172. The straight rail portion 1171 and the limiting notch portion 1173 are located at both ends of the two buffer portions 1172. Through the annular track of the two buffer portions 1172 and the limiting notch portion 1173, the protrusion 7 presses the support platform 5, causing the support platform 5 to drive the limiting hook 113 to move within the limiting track 117. The annular track facilitates locking and unlocking the position of the support platform 5.

[0045] S7. Debug the finished positioning mechanism: When the bearing platform 5 is not limited by the limiting mechanism 11, the bearing platform 5 is flush with one end of the clamping plate 2. When the bearing platform 5 is limited by the limiting mechanism 11, the clamping plate 2 is above the bearing platform 5.

[0046] S8. Use decorative strips to verify the clamping of the finished product of the positioning mechanism. Drive the two clamping plates 2 to move relative to each other through the drive component 3. Utilize the relative clamping force of the two clamping plates 2, the positioning post 6 and the limitation of the groove to make the decorative strips accurately clamped and fixed.

[0047] The positioning mechanism, consisting of a fixed base 1, a spring-loaded limiting mechanism 11, a support platform 5, a positioning post 6, clamping plates 2, and a drive assembly 3, enables the following steps during the processing of decorative strips: Positioning posts 6 are installed in the corresponding positioning holes 8 of the support platform 5 according to the size of the decorative strip and the position of the holes on it. The positioning posts 6 initially position the decorative strip on the support platform 5. Then, pressing the protrusion 7 causes the support platform 5 to move the decorative strip downwards. The limiting mechanism 11 then fixes the downward position of the support platform 5. The drive assembly 3 then moves the two clamping plates 2 relative to each other. Utilizing the relative clamping force of the clamping plates 2, as well as the constraints of the positioning posts 6 and the grooves, the decorative strip is precisely fixed, preventing displacement during processing and improving the positioning accuracy. Furthermore, the spring-loaded limiting mechanism 11 allows for the reset of the processed decorative strip, improving the convenience of removing the strip.

[0048] When the limiting mechanism 11 is not in the limiting position, the limiting hook 113 is located at the end of the straight rail 1171 away from the buffer 1172. When the limiting mechanism 11 is in the limiting position, the limiting hook 113 enters the interior of the limiting recess 1173 along one of the buffers 1172. Through the connection between the limiting hook 113 and the limiting recess 1173, the bearing platform 5 is moved into the bottom of the groove, so that the clamp 2 is above the bearing platform 5. When the limiting mechanism 11 is unlocked, the limiting hook 113 moves from the limiting recess 1173 into another buffer 1172, and then from the buffer 1172 into the straight rail 1171, completing the reset of the bearing platform 5. At this time, the clamp 2 is flush with the bearing platform 5.

[0049] The lower end of the fixed block 111 is fixed with a hinge seat 112. One end of the limit hook 113 is L-shaped and the other end of the limit hook 113 is provided with a hanging ring that is attached to the hinge seat 112, so that the limit hook 113 can turn when it moves to different positions according to the direction of the limit track 117.

[0050] The positioning post 6 includes a positioning part and a threaded part. The side wall of the positioning hole 8 is provided with an internal thread for the threaded part to be screwed in. The positioning part is fixed on the upper end of the threaded part, and the upper end of the positioning part is arc-shaped, which makes it easy to install the corresponding number of positioning posts 6 according to the decorative strips of different rules. This allows the installed positioning posts 6 to be used to fix decorative strips of different shapes, improving the versatility of the positioning mechanism.

[0051] Two support seats 4 are fixed at the lower end of the fixed base 1. The support seat 4 includes a vertical part 401, a support part 402 and a connecting part 403. The support part 402 is fixed on the lower surface of the fixed base 1, and the connecting part 403 is fixed between the support part 402 and the vertical part 401. One end of the drive component 3 is connected to the vertical part 401. The fixed base 1 is supported by the support part 402, and the motor 35 is suspended in the air, which speeds up the heat dissipation efficiency of the motor 35.

[0052] The drive assembly 3 includes a bidirectional screw 31 and a motor 35. The lower surface of the fixed base 1 is provided with a mounting groove 36 for mounting the motor 35. The bidirectional screw 31 is rotatably mounted between two vertical parts 401 and passes through the fixed base 1. The clamping plate 2 is set as an L-shaped plate 21. The two clamping plates 2 are threadedly connected to the bidirectional screw 31. Two guide rods 32 are fixed between the two vertical parts 401. Both guide rods 32 are inserted into the clamping plate 2. The output shaft of the motor 35 and the bidirectional screw 31 are connected by a transmission mechanism, which facilitates the motor 35 to drive the bidirectional screw 31 to rotate through the transmission mechanism. Due to the threaded engagement between the L-shaped plate 21 and the bidirectional screw 31 and the sliding sleeve between the guide rod 32 and the L-shaped plate 21, the L-shaped plate 21 can move relative to the guide rod 32 in the horizontal direction to adjust the distance between the two clamping plates 2, which facilitates the clamping and reinforcement of the decorative strips on the support platform 5.

[0053] The transmission mechanism includes a first bevel gear 33 and a second bevel gear 34. The first bevel gear 33 is sleeved and fixed in the middle of the bidirectional screw 31. The second bevel gear 34 is mounted on the output shaft of the motor 35, and the first bevel gear 33 and the second bevel gear 34 mesh, so that when the motor 35 rotates, it can drive the bidirectional screw 31 to rotate by the two meshing bevel gears.

[0054] Example 2

[0055] The similarities will not be repeated here. The difference from Example 1 is that, as... Figure 5 and Figure 6As shown, the drive assembly 3 includes three electric push rods 37, which are equidistantly fixed on one side of the vertical section 401. Each of the two vertical sections 401 has three electric push rods 37. The clamping plate 2 is a straight plate 22, and the piston rod ends of the three electric push rods 37 are connected to one end of the straight plate 22. The three electric push rods 37 on each vertical section 401 operate synchronously, driving the straight plate 22 to move horizontally. The relative clamping force between the two straight plates 22 reinforces the decorative strip located on the support platform 5. To prevent the straight plate 22 from clamping the decorative strip due to stress, rubber blocks are fixed on opposite sides of the straight plate 22. The elasticity of the rubber blocks prevents damage to the decorative strip caused by stress on the straight plate 22.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for manufacturing a spring-loaded movable precision positioning mechanism, characterized by comprising the following steps: S1. Prepare a fixing seat (1) with a groove at the top and make notches (10) on the opposite sides of the fixing seat (1); S2. Assemble four spring-loaded limiting mechanisms (11) and provide clearance slots for the installation of the limiting mechanisms (11) inside the fixed base (1); S3. Multiple positioning holes (8) are made in a rectangular array on the support platform (5), and protrusions (7) corresponding to the notches (10) are fixed on the opposite sides of the support platform (5); S4. By cooperating with the protrusion (7) and the notch (10), four limiting mechanisms (11) are installed in the clearance slot, the upper end of the limiting mechanism (11) is connected to the support platform (5), and the support platform (5) is installed in the groove of the fixed seat (1). S5. Connect the two clamps (2) to the drive assembly (3), and then install the drive assembly (3) on the fixed base (1) so that one end of the clamp (2) is located inside the other two sides of the fixed base (1); S6. Based on the shape of the decorative strip and the position of the hole in the decorative strip, install the positioning pin (6) in the corresponding positioning hole (8) with a thread to obtain the finished positioning mechanism; S7. Debug the finished positioning mechanism: When the bearing platform (5) is not limited by the limiting mechanism (11), the bearing platform (5) is flush with one end of the clamping plate (2). When the bearing platform (5) is limited by the limiting mechanism (11), the clamping plate (2) is located above the bearing platform (5). S8. Use decorative strips to verify the clamping of the positioning mechanism. Drive the two clamping plates (2) to move relative to each other through the drive component (3). Utilize the relative clamping force of the two clamping plates (2), the positioning post (6), and the limitation of the groove to make the decorative strips accurately clamped and fixed.

2. The method for manufacturing a spring-loaded movable precision positioning mechanism according to claim 1, characterized in that: The four limiting mechanisms (11) are located at the four corners of the lower surface of the support platform (5), and the groove is connected to the clearance slot. The opposite sides of the groove are provided with clearance holes (9) for the clamping plate (2) to pass through.

3. The method for manufacturing a spring-loaded movable precision positioning mechanism according to claim 2, characterized in that: The limiting mechanism (11) includes a fixing block (111), a connecting block (115), and a limiting block (116). The fixing block (111) is fixed on the lower surface of the support platform (5). The connecting block (115) is fixed at one end of the clearance slot near the groove. The limiting block (116) is fixed below the connecting block (115). A spring (114) is installed between the fixing block (111) and the connecting block (115). A limiting hook (113) is hinged to the lower end of the fixing block (111). A limiting rail (117) is provided on one side of the limiting block (116) for the limiting hook (113) to move along the rail.

4. The method for manufacturing a spring-loaded movable precision positioning mechanism according to claim 3, characterized in that: The limiting track (117) includes a straight rail (1171), a limiting notch (1173), and two symmetrically arranged buffer sections (1172). The straight rail (1171) and the limiting notch (1173) are located at both ends of the two buffer sections (1172). The two buffer sections (1172) and the limiting notch (1173) form a ring track. The protrusion (7) presses the support platform (5), causing the support platform (5) to move the limiting hook (113) within the limiting track (117). The ring track facilitates locking and unlocking the position of the support platform (5).

5. The method for manufacturing a spring-loaded movable precision positioning mechanism according to claim 4, characterized in that: When the limiting mechanism (11) is not in the limiting position, the limiting hook (113) is located at the end of the straight rail (1171) away from the buffer (1172). When the limiting mechanism (11) is in the limiting position, the limiting hook (113) enters the interior of the limiting recess (1173) along one of the buffers (1172). Through the connection between the limiting hook (113) and the limiting recess (1173), the pull support platform (5) is moved into the bottom of the groove, so that the clamp (2) is located above the support platform (5). When the limiting mechanism (11) is unlocked, the limiting hook (113) moves from the limiting recess (1173) into another buffer (1172), and then from the buffer (1172) into the straight rail (1171), completing the reset of the support platform (5). At this time, the clamp (2) is flush with the support platform (5).

6. The method for manufacturing a spring-loaded movable precision positioning mechanism according to claim 5, characterized in that: The lower end of the fixed block (111) is fixed with a hinge seat (112), one end of the limiting hook (113) is L-shaped, and the other end of the limiting hook (113) is provided with a hanging ring that is connected to the hinge seat (112).

7. The method for manufacturing a spring-loaded movable precision positioning mechanism according to claim 6, characterized in that: The positioning post (6) includes a positioning part and a threaded part. The side wall of the positioning hole (8) is provided with an internal thread for the threaded part to be screwed in. The positioning part is fixed at the upper end of the threaded part, and the upper end of the positioning part is arc-shaped.

8. A method for manufacturing a spring-loaded movable precision positioning mechanism according to claim 7, characterized in that: The lower end of the fixed base (1) is fixed with two support bases (4). The support base (4) includes a vertical part (401), a support part (402) and a connecting part (403). The support part (402) is fixed on the lower surface of the fixed base (1). The connecting part (403) is fixed between the support part (402) and the vertical part (401). One end of the drive assembly (3) is connected to the vertical part (401).

9. A method for manufacturing a spring-loaded movable precision positioning mechanism according to claim 8, characterized in that: The drive assembly (3) includes a bidirectional screw (31) and a motor (35). The lower surface of the fixed base (1) is provided with a mounting groove (36) for mounting the motor (35). The bidirectional screw (31) is rotatably mounted between two vertical parts (401) and the bidirectional screw (31) passes through the fixed base (1). The clamping plate (2) is set as an L-shaped plate (21). The two clamping plates (2) are threadedly connected to the bidirectional screw (31). Two guide rods (32) are fixed between the two vertical parts (401). The two guide rods (32) are inserted into the clamping plate (2). The output shaft of the motor (35) and the bidirectional screw (31) are connected by a transmission mechanism.

10. A method for manufacturing a spring-loaded movable precision positioning mechanism according to claim 8, characterized in that: The drive assembly (3) includes three electric push rods (37), which are fixed at equal intervals on one side of the vertical part (401), and three electric push rods (37) are installed on each of the two vertical parts (401). The clamping plate (2) is set as a straight plate (22), and the piston rod ends of the three electric push rods (37) are connected to one end of the straight plate (22).

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