Piano ejector rod assembly assembling device and assembling method

Abstract

The invention relates to the technical field of piano assembling, and discloses a piano ejector rod assembly assembling device and assembling method.The piano ejector rod assembly assembling device comprises an assembling machine frame, a dispensing platform, a lead screw sliding table and a pneumatic clamp and further comprises guide rails fixedly installed on the two sides of the inner wall of the assembling machine frame; when a jacking air cylinder drives a lead screw sliding table and a jacking rod assembly on a clamping jaw to be close to the adhesive dispensing position of a groove in the top of a linkage rod, a protruding block at the end of the lead screw sliding table can abut against a positioning wedge table, so that a first wedge table can drive an abutting rod to slide rightwards along a guide groove after being extruded by an inclined face; and a second wedge table can abut against the ends of two sets of abutting blocks through the position difference between a first inclined face and a second inclined face, so that the centralizing plate abuts against the high-low joint position of the ejector rod assembly and the linkage rod, vertical synchronous centralizing of the joint protruding position of the ejector rod assembly and the linkage rod is achieved, and therefore the phenomenon that in the press fit process, the abutting blocks abut against the ends of the abutting blocks is avoided. And the force bearing point and the glue generate sliding deviation, so that sliding displacement is easy to occur at the joint.

Description

Technical Field

[0001] The present invention relates to the technical field of piano assembly, in particular to an assembling device and method for a piano top rod assembly. Background Art

[0002] The piano linkage rod is the basis for assembling the linkage. The spoon nail, support rod, climbing wire, push rod, push rod shaft frame and linkage shaft frame are all assembled on the linkage rod. Usually the push rod and push rod shaft frame are pre-assembled together to form a push rod assembly; when assembling the push rod assembly, first fix the linkage rod on the corresponding tooling, then place the push rod assembly on the corresponding tooling, apply adhesive to the end of the push rod shaft frame, and then install the adhesive-coated end into the shaft frame groove of the linkage rod.

[0003] For example, the Chinese patent authorization announcement number CN218193579U discloses a piano push rod assembly assembly device, including a feeding mechanism, a positioning tool, a glue dispenser, and a manipulator. The feeding mechanism includes a pusher block, a vibrating disk, and a driver. A limiting slot corresponding to the output port of the vibrating disk is provided on one side of the pusher block. The limiting slot can accommodate a single push rod assembly. The driver drives the pusher block to reciprocate along a straight line, and the distance of a single movement of the pusher block is greater than or equal to the slot width of the limiting slot. The movement direction of the pusher block is arranged perpendicular to the discharge direction of the vibrating disk. The positioning tool is provided with a clamping position for clamping a linkage rod. The output port of the glue dispenser is arranged corresponding to the clamping position. The manipulator is used to grab the push rod assembly at the limiting slot and move it above the clamping position, and assemble the push rod assembly on the linkage rod at the clamping position. The above cited documents have the advantages of high degree of automation, accurate positioning and high assembly precision.

[0004] When the above-mentioned piano top rod assembly is glued and assembled, the clamp glues the top rod assembly and the middle groove of the linkage rod and then presses down for assembly. When the clamp directly presses the top rod assembly and the electric glue part in the groove, the pressing force point and the glue produce a sliding offset, which makes the joint easy to slide and shift, and even the joint of the top rod assembly and the groove slips out, resulting in stress deformation. In addition, when the glue in the groove of the top rod assembly after connection is not dry, the assembly part of the top rod assembly and the linkage rod is easy to fall off when it moves out of the work station. Summary of the Invention

[0005] The purpose of the present invention is to provide a piano top rod assembly assembly device and assembly method, which can realize the straightening of the connection between the top rod assembly and the linkage rod to avoid sliding and displacement. At the same time, it can blow air on the glued area to make it dry faster.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a piano top rod assembly assembly device and assembly method, comprising an assembly frame, a dispensing platform, a screw slide, and a pneumatic clamp, and further comprising: The guide rails are fixedly mounted on both sides of the inner wall of the assembly frame, and the two sets of guide rails are respectively fixedly mounted with mounting plates near the bottom, and the mounting plates are fixedly mounted with end plates at one end close to the dispensing platform, and the side of the end plate is movably connected with a centralizing plate, and the centralizing plate is integrally formed with a stop block at one end away from the dispensing platform, and the middle of the guide groove is movably connected with a stop rod, and the two ends of the stop rod are respectively fixedly mounted with a first wedge platform and a second wedge platform; An air nozzle, fixedly installed at the top of the pneumatic clamp; The telescopic airbag is fixedly installed at the bottom of the guide rail on the same side. A piston is fixedly installed near the top of the inner cavity of the telescopic airbag. A positioning wedge is fixedly installed on the top of the piston. An air guide tube is fixedly installed between the bottom of the telescopic airbag and the air nozzle.

[0007] Preferably, a connecting plate is fixedly installed on the top of the two groups of guide rails, a top-pressure cylinder is fixedly installed in the middle of the connecting plate, the protrusions at both ends of the screw slide slide inside the corresponding guide rails, the telescopic end of the top-pressure cylinder is fixedly connected to the top of the screw slide, and a clamp is installed at the bottom of the slider inside the screw slide.

[0008] Preferably, a slide is slidably installed on the electric slide at the top of the dispensing platform, and cylinders are fixedly installed on both sides of the top of the slide. The pneumatic clamp is fixedly installed on the telescopic ends of the corresponding cylinders. The pneumatic clamp slides on both sides of the top of the slide, and the mounting plate is fixedly installed at the top of the dispensing platform away from the guide rail.

[0009] Preferably, guide grooves are respectively provided through the top of the mounting plate near both ends, and the first wedge platform and the second wedge platform slide inside the two groups of guide grooves respectively.

[0010] Preferably, the push rod movably passes through the two groups of guide grooves, and a resistance spring is fixedly installed between the first wedge platform and the second wedge platform and the inner wall of the guide groove respectively.

[0011] Preferably, a return spring is fixedly installed at the connection between the straightening plate and the end plate, and the second wedge is provided with a first inclined surface and a second inclined surface at the top and bottom near one end of the stop block respectively, and the side surface of the first inclined surface contacts the end of the stop block above.

[0012] Preferably, the first inclined side surface corresponds to the upper stop block, and the second inclined side surface corresponds to the upper stop block.

[0013] Preferably, the two groups of positioning wedges slide in the corresponding guide rails respectively, and the bottom of the positioning wedge is in contact with the top of the first wedge.

[0014] Preferably, a linkage rod is clamped between the two groups of pneumatic clamps, a push rod assembly is clamped on the clamping jaws, the bottom end of the push rod assembly is inserted into the middle groove of the linkage rod, and the two groups of air nozzles respectively correspond to the grooves at the connection between the linkage rod and the push rod assembly.

[0015] Preferably, S1, placing the linkage rod in the middle of the slide, and pneumatically clamping and positioning it with a pneumatic clamp, and sliding the slide on the top of the dispensing platform to the dispensing head for dispensing; S2, the slide drives the linkage rod in the middle of the pneumatic clamp to move to the bottom of the screw slide. At this time, the clamping claw clamps the push rod assembly and presses it down through the push cylinder; S3. The top pressure cylinder drives the screw slide and the upper push rod assembly of the clamping jaw to approach the glue point of the top groove of the linkage rod. The straightening plate cooperates synchronously to respectively support the high and low points where the push rod assembly and the linkage rod are connected. The protruding position of the push rod assembly and the linkage rod is straightened synchronously up and down, so that the clamping jaw presses the linkage rod to the glue point of the middle groove of the push rod assembly for bonding and fixing. S4. The telescopic end of the top pressure cylinder drives the screw slide to move upward, the straightening plate is reset by the reset spring, and the positioning wedge is reset to the initial state through the corresponding first wedge and the telescopic airbag.

[0016] Compared with the prior art, the present invention has the following beneficial effects: When the top pressure cylinder drives the screw slide and the upper push rod assembly of the clamping jaw to approach the glue point of the groove on the top of the linkage rod, the convex block at the end of the screw slide can abut the positioning wedge, so that the first wedge can be squeezed by the inclined surface and drive the push rod to slide right along the guide groove, and the second wedge can abut the ends of the two sets of push blocks respectively through the position difference between the first inclined surface and the second inclined surface, so that the straightening plate can respectively abut and support the high and low points where the push rod assembly and the linkage rod are connected, thus achieving the synchronous straightening of the upper and lower protruding positions of the push rod assembly and the linkage rod, thereby avoiding the sliding offset of the force point and the glue during pressing, which makes the connection easy to slide and shift; When the positioning wedge in the present invention slides down along the guide rail, it can press the end of the piston downward to compress the telescopic airbag, thereby injecting the internal gas into the air nozzle through the air guide tube. In this way, while the piano top rod assembly and the linkage rod groove are pressed and assembled at the gluing point, air can be blown on the side, so that the glue at the gluing part dries faster, avoiding the situation where the top rod assembly and the linkage rod assembly part are easily fallen off when the glue at the groove of the connected top rod assembly is not completely dry. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the frame top in the present invention; Figure 3 This is a schematic diagram of the assembly structure of the linkage rod and the push rod assembly in the present invention; Figure 4 It is a structural schematic diagram of the glue injection machine in the present invention; Figure 5 Schematic diagram of the side cross-section structure of the connecting plate in the present invention; Figure 6 for Figure 4 A schematic diagram of the partially enlarged structure at center A; Figure 7 for Figure 5 Schematic diagram of the locally enlarged structure at point B in the middle.

[0018] In the figure: 100, assembly frame; 200, dispensing platform; 300, screw slide; 400, mounting plate; 500, pneumatic clamp; 600, air nozzle; 700, telescopic airbag; 11, connecting plate; 12, top pressure cylinder; 13, guide rail; 21, slide plate; 31, clamping claw; 40, end plate; 41, guide groove; 42, first wedge; 43, resistance spring; 44, resistance rod; 45, second wedge; 401, straightening plate; 402, return spring; 403, resistance block; 451, first inclined plane; 452, second inclined plane; 51, linkage rod; 52, push rod assembly; 71, piston; 72, positioning wedge; 73, air guide tube. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Example 1: This embodiment introduces a piano top rod assembly assembly device and assembly method, such as Figure 1-Figure 7 As shown, it includes an assembly frame 100, a dispensing platform 200, a screw slide 300, a pneumatic clamp 500, and also includes: The guide rails 13 are fixedly mounted on both sides of the inner wall of the assembly frame 100. The two sets of guide rails 13 are fixedly mounted with mounting plates 400 near the bottom. An end plate 40 is fixedly mounted on the end of the mounting plate 400 close to the dispensing platform 200. A centralizing plate 401 is movably connected to the side of the end plate 40. A stop block 403 is integrally formed on the end of the centralizing plate 401 away from the dispensing platform 200. A stop rod 44 is movably connected to the middle of the guide groove 41. A first wedge platform 42 and a second wedge platform 45 are fixedly mounted on both ends of the stop rod 44. Among them, a connecting plate 11 is fixedly installed on the top of the two sets of guide rails 13, and a top-pressing cylinder 12 is fixedly installed in the middle of the connecting plate 11. The protrusions at both ends of the screw slide 300 slide inside the corresponding guide rails 13, and the telescopic end of the top-pressing cylinder 12 is fixedly connected to the top of the screw slide 300. A clamping claw 31 is installed at the bottom of the slider inside the screw slide 300. After the top rod assembly 52 is clamped by the clamping claw 31, the top-pressing cylinder 12 is pressed down, so that the clamping claw 31 presses the linkage rod 51 onto the glue point in the middle groove of the top rod assembly 52 for bonding and fixing.

[0021] Among them, a skateboard 21 is slidably installed on the electric slide at the top of the dispensing platform 200, and cylinders are fixedly installed on both sides of the top of the skateboard 21. The pneumatic clamp 500 is fixedly installed on the telescopic end of the corresponding cylinder. The pneumatic clamp 500 slides on both sides of the top of the skateboard 21, and the mounting plate 400 is fixedly installed at the top of the dispensing platform 200 away from the guide rail 13. After the linkage rod 51 is pneumatically clamped in the middle of the skateboard 21 by the pneumatic clamp 500, it slides to the dispensing head on the top of the dispensing platform 200 through the skateboard 21 for dispensing, and then moves to the bottom of the screw slide 300.

[0022] Among them, guide grooves 41 are respectively opened through the top of the mounting plate 400 near both ends, the first wedge platform 42 and the second wedge platform 45 slide inside the two groups of guide grooves 41 respectively, and the push rod 44 moves through the two groups of guide grooves 41. The first wedge platform 42 and the second wedge platform 45 are respectively fixedly installed with a resistance spring 43 between the inner walls of the guide groove 41. When the top pressure cylinder 12 drives the screw slide 300 and the upper push rod assembly 52 of the clamping jaw 31 to approach the glue point of the top groove of the linkage rod 51, the end protrusion of the screw slide 300 can resist the positioning wedge platform 72, so that the first wedge platform 42 can be squeezed by the inclined surface and drive the push rod 44 to slide to the right along the guide groove 41.

[0023] The second wedge 45 can respectively contact the ends of the two groups of blocks 403 through the position difference between the first inclined surface 451 and the second inclined surface 452, so that the straightening plate 401 can respectively support the high and low points of the connection between the push rod assembly 52 and the linkage rod 51, thereby realizing the synchronous correction of the upper and lower protruding positions of the push rod assembly 52 and the linkage rod 51, thereby avoiding the sliding offset of the force point and the glue during pressing.

[0024] In this embodiment, the linkage rod 51 is pneumatically clamped in the middle of the slide plate 21 by the pneumatic clamp 500, and then slides on the top of the dispensing platform 200 to the dispensing head for dispensing. Then, the linkage rod 51 is moved to the bottom of the screw slide 300, and the top rod assembly 52 is clamped by the clamping claw 31. Then, the top pressure cylinder 12 is pressed downward so that the clamping claw 31 presses the linkage rod 51 into the dispensing position of the groove in the middle of the top rod assembly 52 for bonding and fixing. The piano top rod assembly 52 and the linkage rod 51 are assembled by gluing, which is a conventional technical solution and will not be described in detail here. When the pressing cylinder 12 drives the screw slide 300 and the upper push rod assembly 52 of the clamping jaw 31 to approach the glue point of the top groove of the linkage rod 51, the end convex block of the screw slide 300 can abut against the positioning wedge 72, so that the first wedge 42 can be squeezed by the inclined surface, and the push rod 44 can slide to the right along the guide groove 41, and the second wedge 45 can abut against the ends of the two groups of push blocks 403 respectively through the position difference between the first inclined surface 451 and the second inclined surface 452, so that the straightening plate 401 can respectively abut against the high and low points where the push rod assembly 52 and the linkage rod 51 are connected. In this way, the push rod assembly 52 and the linkage rod 51 are synchronously straightened at the upper and lower protruding positions where they are connected, thereby avoiding the sliding offset between the force point and the glue during pressing, which makes it easy for the connection to slide and shift. Example 2: Based on Example 1, this embodiment introduces a piano top rod assembly assembly device and assembly method, such as Figure 5 、 Figure 7 As shown, it includes: an air nozzle 600, fixedly installed at the top of the pneumatic clamp 500; The telescopic airbag 700 is fixedly installed at the bottom of the guide rail 13 on the same side. A piston 71 is fixedly installed near the top of the inner cavity of the telescopic airbag 700. A positioning wedge 72 is fixedly installed on the top of the piston 71. An air guide tube 73 is fixedly installed between the bottom of the telescopic airbag 700 and the air nozzle 600.

[0025] Among them, a linkage rod 51 is clamped between the two groups of pneumatic clamps 500, and a push rod assembly 52 is clamped on the clamping jaws 31. The bottom end of the push rod assembly 52 is inserted into the groove in the middle of the linkage rod 51, and the two groups of air nozzles 600 respectively correspond to the grooves at the connection between the linkage rod 51 and the push rod assembly 52. ​​When the positioning wedge 72 slides down along the guide rail 13, it can press the end of the piston 71 downward to compress the telescopic airbag 700, thereby injecting the internal gas into the air nozzle 600 through the air guide tube 73. In this way, when the piano push rod assembly 52 and the linkage rod 51 groove are pressed and assembled, air can be blown on the side, so that the glue in the glued part dries faster.

[0026] Among them, S1, place the linkage rod 51 in the middle of the slide 21, and pneumatically clamp and position it through the pneumatic clamp 500, and slide the slide 21 on the top of the dispensing platform 200 to the dispensing head for dispensing; S2, the slide 21 drives the linkage rod 51 in the middle of the pneumatic clamp 500 to move below the screw slide 300. At this time, the clamping claw 31 clamps the push rod assembly 52 and presses it down through the push cylinder 12; S3, the top pressure cylinder 12 drives the screw slide 300 and the upper push rod assembly 52 of the clamping jaw 31 to move closer to the glue point of the top groove of the linkage rod 51, and the straightening plate 401 cooperates synchronously to respectively support the high and low points where the push rod assembly 52 and the linkage rod 51 are connected. The upper and lower protruding positions of the push rod assembly 52 and the linkage rod 51 are synchronously straightened, so that the clamping jaw 31 presses the linkage rod 51 to the glue point of the middle groove of the push rod assembly 52 for bonding and fixing; S4, the telescopic end of the top pressure cylinder 12 drives the screw slide 300 to move upward, the straightening plate 401 is reset by the reset spring 402, and the positioning wedge 72 is reset to the initial state through the corresponding first wedge 42 and the telescopic airbag 700.

[0027] In this embodiment, when the positioning wedge 72 slides down along the guide rail 13, it can press the end of the piston 71 downward, compressing the telescopic airbag 700, thereby injecting the internal gas into the air nozzle 600 through the air guide tube 73. In this way, while the piano top rod assembly 52 and the linkage rod 51 are being pressed and assembled at the gluing point of the groove, air can be blown on the side, so that the glue at the gluing part dries faster, avoiding the situation where the top rod assembly 52 and the linkage rod 51 assembly part is easily detached when the glue at the groove of the connected top rod assembly is not completely dry.

[0028] Working principle: When assembling the piano top rod assembly 52, first place the linkage rod 51 in the middle of the slide 21 and pneumatically clamp it in place with the pneumatic clamp 500. Then, slide the slide 21 on the top of the glue dispensing platform 200 to the glue dispensing head for glue dispensing. Then, move it to the bottom of the screw slide 300, and the clamp 31 clamps the top rod assembly 52. When the upper and lower parts of the push rod assembly 52 and the linkage rod 51 are connected, the upper and lower parts of the push rod assembly 52 and the linkage rod 51 are connected, and the upper and lower parts of the push rod assembly 52 and the linkage rod 51 are connected. At the same time, as the positioning wedge 72 slides down along the guide rail 13, it can press the end of the piston 71 downward, compressing the telescopic airbag 700, thereby injecting the internal gas through the air guide tube 73 into the air nozzle 600. In this way, while the piano top rod assembly 52 and the connecting rod 51 are pressed and assembled at the glue point of the groove, air can be blown to the side, thereby making the glue in the glued area dry faster; Finally, the telescopic end of the top pressure cylinder 12 drives the screw slide 300 to move upward, the straightening plate 401 is reset by the reset spring 402, and the first wedge 42 and the second wedge 45 at both ends of the support rod 44 are also reset by the deformation initially generated by the resistance spring 43, and the positioning wedge 72 is reset to the initial state through the corresponding first wedge 42 and the telescopic airbag 700.

[0029] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes and modifications may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A piano top rod assembly assembly device, comprising an assembly frame (100), a glue dispensing platform (200), a screw slide (300), and a pneumatic clamp (500), characterized in that: Also includes: The guide rails (13) are fixedly mounted on both sides of the inner wall of the assembly frame (100), and the two groups of the guide rails (13) are respectively fixedly mounted with mounting plates (400) near the bottom, and the mounting plates (400) are fixedly mounted with end plates (40) near one end of the dispensing platform (200), and the side of the end plate (40) is movably connected with a straightening plate (401), and the straightening plate (401) is integrally formed with a stop block (403) at one end away from the dispensing platform (200), and the top of the mounting plate (400) is respectively penetrated with a guide groove (41) near both ends, and the middle of the guide groove (41) is movably connected with a stop rod (44), and the two ends of the stop rod (44) are respectively fixedly mounted with a first wedge platform (42) and a second wedge platform (45); An air nozzle (600) is fixedly mounted on the top of the pneumatic clamp (500); The telescopic airbag (700) is fixedly mounted at the bottom of the guide rail (13) on the same side. A piston (71) is fixedly mounted near the top of the inner cavity of the telescopic airbag (700). A positioning wedge (72) is fixedly mounted on the top of the piston (71). An air guide tube (73) is fixedly mounted between the bottom of the telescopic airbag (700) and the air nozzle (600).

2. The piano top rod assembly assembly device according to claim 1, characterized in that: A connecting plate (11) is fixedly installed on the top of the two groups of guide rails (13), and a top-pressing cylinder (12) is fixedly installed in the middle of the connecting plate (11). The protrusions at both ends of the screw slide (300) slide inside the corresponding guide rails (13). The telescopic end of the top-pressing cylinder (12) is fixedly connected to the top of the screw slide (300), and a clamping claw (31) is installed at the bottom of the slider inside the screw slide (300).

3. The piano top rod assembly assembly device according to claim 2, characterized in that: A slide plate (21) is slidably mounted on the electric slide at the top of the dispensing platform (200), and cylinders are fixedly mounted on both sides of the top of the slide plate (21). The pneumatic clamp (500) is fixedly mounted on the corresponding telescopic ends of the cylinders, and the pneumatic clamp (500) slides on both sides of the top of the slide plate (21). The mounting plate (400) is fixedly mounted on the top of the dispensing platform (200) at one end away from the guide rail (13).

4. The piano top rod assembly assembly device according to claim 3, characterized in that: The first wedge platform (42) and the second wedge platform (45) slide inside the two sets of guide grooves (41) respectively.

5. The piano top rod assembly assembly device according to claim 4, characterized in that: The push rod (44) is movable and passes through the two groups of guide grooves (41), and a resisting spring (43) is fixedly installed between the first wedge platform (42) and the second wedge platform (45) and the inner wall of the guide groove (41).

6. The piano top rod assembly assembly device according to claim 5, characterized in that: A return spring (402) is fixedly installed at the connection between the straightening plate (401) and the end plate (40), and a first inclined surface (451) and a second inclined surface (452) are respectively provided at the top and bottom of one end of the second wedge (45) close to the stop block (403), and the side surface of the first inclined surface (451) contacts the end of the stop block (403) above.

7. The piano top rod assembly assembly device according to claim 6, characterized in that: The side surface of the first inclined surface (451) corresponds to the upper stop block (403), and the side surface of the second inclined surface (452) corresponds to the upper stop block (403).

8. The piano top rod assembly assembly device according to claim 7, characterized in that: The two groups of positioning wedge platforms (72) slide in the corresponding guide rails (13) respectively, and the bottom of the positioning wedge platform (72) fits with the top of the first wedge platform (42).

9. The piano top rod assembly assembly device according to claim 7, characterized in that: A linkage rod (51) is clamped between the two groups of pneumatic clamps (500), a push rod assembly (52) is clamped on the clamping jaws (31), the bottom end of the push rod assembly (52) is inserted into the middle groove of the linkage rod (51), and the two groups of air nozzles (600) respectively correspond to the grooves at the connection between the linkage rod (51) and the push rod assembly (52).

10. An assembly method using the piano top rod assembly assembly device according to any one of claims 1 to 9, characterized in that: S1. Place the linkage rod (51) in the middle of the slide (21) and pneumatically clamp and position it through the pneumatic clamp (500), and slide the slide (21) on the top of the dispensing platform (200) to the dispensing head for dispensing; S2, the slide plate (21) drives the linkage rod (51) in the middle of the pneumatic clamp (500) to move to the bottom of the screw slide (300). At this time, the clamping claw (31) clamps the push rod assembly (52) and presses it down through the push cylinder (12); S3, the top pressure cylinder (12) drives the screw slide (300) and the upper push rod assembly (52) of the clamping jaw (31) to approach the top groove glue point of the linkage rod (51), and the straightening plate (401) cooperates synchronously to respectively support the high and low points where the push rod assembly (52) and the linkage rod (51) are connected. The push rod assembly (52) and the linkage rod (51) are synchronously straightened at the upper and lower protruding positions where the push rod assembly (52) and the linkage rod (51) are connected, so that the clamping jaw (31) presses the linkage rod (51) to the middle groove glue point of the push rod assembly (52) for bonding and fixing; S4, the telescopic end of the top pressure cylinder (12) drives the screw slide (300) to move upward, the straightening plate (401) is reset by the reset spring (402), and the positioning wedge (72) is reset to the initial state through the corresponding first wedge (42) and the telescopic airbag (700).

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