A wiper assembly support tube riveting apparatus

Abstract

The application discloses a kind of automobile wiper assembly support pipe riveting equipment, including outer frame, riveting mechanism body, quick connection quick installation structure and upper rack, the both sides of outer frame top are provided with quick connection quick installation structure, the both sides of the center of outer frame top are provided with riveting mechanism body, the outside of outer frame top is provided with upper rack, the right side of the outside of outer frame is provided with hydraulic station, riveting mechanism body includes left riveting mechanism body and right riveting mechanism, left riveting mechanism body is set on the left side of the top of outer frame.The left and right supports and support tube are assembled in the application, then the assembled parts are placed in the riveting position, then, left and right riveting is carried out first, then the middle automatic pressure nest is formed, and finally the parts are taken out, the processing efficiency of the riveting equipment is high, and the process is less.Left nest, middle nest and right nest are processed simultaneously, which saves processing time, reduces labor intensity and increases processing efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of riveting equipment, in particular to a riveting equipment for automobile wiper assembly support pipe. BACKGROUND

[0002] The wiper assembly system of the automobile is used for cleaning the windshield of the automobile to provide a clear and bright driving view for the driver. The working principle of the wiper assembly is that the motor drives the crank to rotate, and the crank drives the left connecting rod and the right connecting rod to move, and the left rocker arm and the right rocker arm drive the left swing shaft and the right swing shaft to make a certain angle of reciprocating rotary motion. The former is processed by pipe packaging, and the riveting mode sequence is: 1, replace the left and right riveting dies, 2, assemble the left and right supports and the support pipe, 3, place the assembled parts into the riveting position, 4, rivet the left and right pockets, 5, take out the parts, 6, replace the middle pocket die, 7, place the parts with the two sides of the pocket processed into the riveting position, 8, rivet the middle pocket (motor installation pocket), 9, take out the parts, which is the process of completing the pipe packaging. This mode has more operation actions and complicated processing procedures, which leads to high labor intensity of the operator and low efficiency. SUMMARY

[0003] The present application relates to the technical field of riveting equipment, in particular to a riveting equipment for automobile wiper assembly support pipe.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] A riveting equipment for automobile wiper assembly support pipe, comprising an outer frame, a riveting mechanism body, a quick-connection quick-assembly structure and an upper rack, the two sides of the top of the outer frame are provided with the quick-connection quick-assembly structure, the center of the top of the outer frame is provided with the riveting mechanism body, the outside of the top of the outer frame is provided with the upper rack, the right side of the outside of the outer frame is provided with a hydraulic station, the riveting mechanism body comprises a left riveting mechanism body and a right riveting mechanism, the left riveting mechanism body is arranged on the left side of the top of the outer frame, the right riveting mechanism is arranged on the right side of the top of the outer frame, a left positioning mechanism is arranged on the position close to the left riveting mechanism body of the top of the outer frame, a right positioning mechanism is arranged on the position close to the right riveting mechanism of the top of the outer frame, a middle fixed support pipe mechanism is arranged on the center position of the top of the outer frame, a middle pocket mechanism is arranged on the position close to the middle fixed support pipe mechanism of the top of the outer frame, and a support pipe component is arranged between the left positioning mechanism, the left riveting mechanism body, the right riveting mechanism, the right positioning mechanism and the middle fixed support pipe mechanism.

[0006] Preferably, the inside of the left positioning mechanism comprises a left support output shaft positioning support block, which is bolted to the top of the outer frame, the top of the left support output shaft positioning support block is fixed with a left positioning cylinder mounting plate, the top of the left positioning cylinder mounting plate is fixed with a left positioning cylinder body, the outside of the left positioning cylinder mounting plate is fixed with a support rocker arm limiting block, the output end of the left positioning cylinder body is connected with a cylinder connecting shaft, the back of the support rocker arm limiting block is fixed with a left support output shaft limiting block, a fixed shaft sliding block is connected to the cylinder connecting shaft, a support body is arranged on the fixed shaft sliding block, a pressing plate is arranged on the support body, and the structure of the right positioning mechanism is the same as that of the left positioning mechanism.

[0007] Preferably, the inside of the intermediate fixed support pipe mechanism comprises a support rod, the top of the support rod is fixed with a support pipe fixing block, the top of the support pipe fixing block is fixed with a pressing positioning cylinder mounting plate, the top of the pressing riveting mechanism body is fixed with a pressing positioning cylinder body near the front, the output end of the pressing positioning cylinder body is connected with a first floating joint, the bottom of the first floating joint is connected with a connecting block body, the bottom of the connecting block body is connected with a connecting rod on both sides, the bottom of the connecting rod is connected with an optim power glue pressure head, linear bearings are fixed on both sides of the top of the pressing positioning cylinder mounting plate, guide shafts are fixed on both sides of the top of the connecting block body, and the guide shafts pass through the linear bearings and extend out.

[0008] Preferably, the inside of the left pressing riveting mechanism body comprises a hydraulic cylinder body, a left pressing riveting mechanism front pushing cylinder and a linear guide rail, the linear guide rail is installed to the outer frame, a I-shaped block is slidably arranged on the linear guide rail, the left pressing riveting mechanism front pushing cylinder is fixed to the top of the outer frame through a support, the output end of the left pressing riveting mechanism front pushing cylinder is connected with a second floating joint, the second floating joint and the I-shaped block are connected with each other, a hydraulic cylinder mounting plate is fixed to the top of one side of the I-shaped block, a hydraulic cylinder body is arranged on one side of the hydraulic cylinder mounting plate, a hydraulic cylinder connecting head is connected to the output end of the hydraulic cylinder body, a pressure sensor is connected to one side of the hydraulic cylinder connecting head, a guide shaft is arranged on one side of the pressure sensor, an intermediate connecting block is arranged on one side of the guide shaft, a riveting head mechanism is arranged in the I-shaped block and one side of the I-shaped block, and a limiting block body is fixed to one side of the top of the linear guide rail.

[0009] Preferably, the inside of the riveting head mechanism is sequentially provided with an inner hexagonal cylindrical head shoulder screw, a spring, a riveting head body, a riveting head bottom plate, an intermediate guide plate and a semicircular groove plate, and the intermediate guide plate is fixed to one side of the riveting head bottom plate.

[0010] Preferably, the rivet head bottom plate and the intermediate guide plate are fixed with an internal hexagonal cylindrical head shoulder screw, the external part of the internal hexagonal cylindrical head shoulder screw is coiled with a spring, one end of the internal hexagonal cylindrical head shoulder screw is connected with a rivet body, the external part of the internal hexagonal cylindrical head shoulder screw is slidably provided with a semicircular groove plate, the rivet body extends into the semicircular groove plate, one end of the spring extends into the semicircular groove plate, and the other end of the spring is arranged into the intermediate guide plate.

[0011] Compared with the prior art, the automobile wiper assembly support pipe riveting equipment has the advantages of reasonable structure, and the following advantages are provided.

[0012] (1) The left positioning mechanism, the left riveting mechanism body, the intermediate riveting mechanism, the right riveting mechanism, the right positioning mechanism and the intermediate fixed support pipe mechanism make the device have high processing efficiency, so first, the left and right supports and the support pipe are assembled, then the assembled parts are placed in the riveting position, then the left and right riveting is performed, then the intermediate automatic riveting is performed, and finally the parts are taken out, so that the riveting equipment has high processing efficiency and few processes. The left riveting, the intermediate riveting and the right riveting are simultaneously processed, so that the processing time is saved, the labor intensity of workers is reduced, and the processing efficiency is increased.

[0013] (2) Different products of the present application only switch the riveting mechanism part, and the rest is shared, so that the equipment cost is reduced.

[0014] (3) The present application has an error prevention function, when the wrong parts are taken for processing, the support pipe part cannot be placed in the riveting position, and the hard limit error prevention is realized. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a front view of the internal structure of the present application;

[0016] Figure 2 It is a schematic view of the structure of the present application when it is separated in three dimensions;

[0017] Figure 3 It is a schematic view of the structure of the present application;

[0018] Figure 4 It is a schematic view of the structure of the left riveting mechanism body of the present application.

[0019] Figure 5 It is a schematic view of the structure of the left riveting mechanism body of the present application from the top;

[0020] Figure 6 It is a schematic view of the structure of the intermediate fixed support pipe mechanism of the present application;

[0021] Figure 7 It is a schematic view of the structure of the left riveting mechanism body of the present application from the top;

[0022] Figure 8The rivet head mechanism structure schematic view of the present application.

[0023] In the figure: 1, outer frame; 2, rivet mechanism body; 3, quick connection and quick installation structure; 4, upper stand; 5, hydraulic station; 6, left positioning mechanism; 7, left rivet mechanism body; 8, middle pressing nest mechanism; 9, right rivet mechanism; 10, right positioning mechanism; 11, support pipe component; 12, middle fixed support pipe mechanism; 13, left support output shaft positioning support block; 14, left positioning cylinder mounting plate; 15, left positioning cylinder body; 16, support rocker arm limiting block; 17, cylinder connecting shaft; 18, support body; 19, left support output shaft limiting block; 20, pressing plate; 21, fixed shaft sliding block; 22, support rod; 23, support pipe fixing block; 24, excellent glue pressing head; 25, connecting rod; 26, connecting block body; 27, first floating joint; 28, lower pressing positioning cylinder mounting plate; 29, linear bearing; 30, guide shaft; 31, lower pressing positioning cylinder body; 32, hydraulic cylinder body; 33, hydraulic cylinder mounting plate; 34, left rivet mechanism front pushing cylinder; 35, hydraulic cylinder connecting head; 36, pressure sensor; 37, conducting shaft; 38, second floating joint; 39, middle connecting block; 40, I-shaped block; 41, linear guide rail; 42, limiting block body; 43, rivet mechanism; 45, inner hexagonal cylindrical head shaft shoulder screw; 46, spring; 47, rivet body; 48, rivet bottom plate; 49, middle guide plate; 50, semicircular groove plate. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the protection scope of the present application.

[0025] Please refer to Figures 1-8The application provides a riveting device for a support pipe of a car wiper assembly, which comprises an outer frame 1, a riveting mechanism body 2, a quick-connection quick-assembly structure 3 and an upper rack 4. The quick-connection quick-assembly structure 3 is arranged at the two sides of the top of the outer frame 1. The riveting mechanism body 2 is arranged at the center of the top of the outer frame 1. The upper rack 4 is arranged outside the top of the outer frame 1. The hydraulic station 5 is arranged at the right side of the outer frame 1. The left riveting mechanism body 7 and the right riveting mechanism 9 are arranged in the riveting mechanism body 2. The left riveting mechanism body 7 is arranged at the left side of the top of the outer frame 1. The right riveting mechanism 9 is arranged at the right side of the top of the outer frame 1. The left positioning mechanism 6 is arranged at the position close to the left riveting mechanism body 7 of the top of the outer frame 1. The right positioning mechanism 10 is arranged at the position close to the right riveting mechanism 9 of the top of the outer frame 1. The middle fixed support pipe mechanism 12 is arranged at the center position of the top of the outer frame 1. The middle pressing nest mechanism 8 is arranged at the position close to the middle fixed support pipe mechanism 12 of the top of the outer frame 1. The support pipe component 11 is arranged between the left positioning mechanism 6, the left riveting mechanism body 7, the right riveting mechanism 9, the right positioning mechanism 10 and the middle fixed support pipe mechanism 12.

[0026] The left positioning mechanism 6 comprises a left support output shaft positioning support block 13. The left support output shaft positioning support block 13 is arranged at the top of the outer frame 1 through bolts. The left positioning cylinder mounting plate 14 is fixed to the top of the left support output shaft positioning support block 13. The left positioning cylinder body 15 is fixed to the top of the left positioning cylinder mounting plate 14. The support rocker arm limiting block 16 is fixed to the outside of the left positioning cylinder mounting plate 14. The left support output shaft limiting block 19 is fixed to the back of the support rocker arm limiting block 16. The fixed shaft sliding block 21 is connected to the cylinder connecting shaft 17. The support body 18 is arranged on the fixed shaft sliding block 21. The pressing plate 20 is arranged on the support body 18. The structure of the right positioning mechanism 10 is the same as that of the left positioning mechanism 6.

[0027] Then the cylinders of the left positioning mechanism 6 and the right positioning mechanism 10 act simultaneously. Then the cylinders make the cylinder connecting shaft 17 move, and the cylinder connecting shaft 17 makes the fixed shaft sliding block 21 move to fix the support pipe component 11.

[0028] The inside of the intermediate fixed support pipe mechanism 12 comprises a support rod 22, the top of the support rod 22 is fixed with a support pipe fixing block 23, the top of the support pipe fixing block 23 is fixed with a downward positioning cylinder mounting plate 28, the top of the riveting mechanism body 2 near the front is fixed with a downward positioning cylinder body 31, the output end of the downward positioning cylinder body 31 is connected with a first floating joint 27, the bottom of the first floating joint 27 is connected with a connecting block 26, the bottom of the connecting block 26 is connected with connecting rods 25 on both sides, the bottom of the connecting rods 25 is connected with a strong glue pressure head 24, the top of the downward positioning cylinder mounting plate 28 is fixed with linear bearings 29 on both sides, the top of the connecting block 26 is fixed with guide shafts 30 on both sides, the guide shafts 30 pass through the linear bearings 29 and extend out;

[0029] The cylinder connecting shaft 17 moves the fixed shaft sliding block 21 to fix the support pipe component 11, and then the downward positioning cylinder body 31 is started, the downward positioning cylinder body 31 moves the first floating joint 27, the first floating joint 27 moves the connecting block 26, the connecting block 26 moves the connecting rods 25, and the connecting rods 25 press the strong glue pressure head 24 to the top of the support pipe component 11;

[0030] The inside of the left riveting mechanism body 7 comprises a hydraulic cylinder body 32, a left riveting mechanism front pushing cylinder 34 and a linear guide rail 41, the linear guide rail 41 is installed to the outer frame 1, a I-shaped block 40 is slidably arranged on the linear guide rail 41, the left riveting mechanism front pushing cylinder 34 is fixed to the top of the outer frame 1 through a support, the output end of the left riveting mechanism front pushing cylinder 34 is connected with a second floating joint 38, the second floating joint 38 is connected with the I-shaped block 40, a hydraulic cylinder mounting plate 33 is fixed to the top of one side of the I-shaped block 40, the hydraulic cylinder mounting plate 33 is provided with the hydraulic cylinder body 32 on one side, the output end of the hydraulic cylinder body 32 is connected with a hydraulic cylinder connecting head 35, the hydraulic cylinder connecting head 35 is connected with a pressure sensor 36 on one side, the pressure sensor 36 is connected with a transmission shaft 37 on one side, the transmission shaft 37 is provided with an intermediate connecting block 39 on one side, the intermediate connecting block 39 and the I-shaped block 40 are provided with a riveting head mechanism 43 on one side inside, a limiting block 42 is fixed to one side of the top of the linear guide rail 41, the intermediate pressing mechanism 8 and the right riveting mechanism 9 have the same structure as the left riveting mechanism body 7;

[0031] The left riveting mechanism front pushing cylinder 34 is started, the left riveting mechanism front pushing cylinder 34 drives the I-shaped block 40 to move, the I-shaped block 40 is moved to a suitable position, then the hydraulic cylinder body 32 is started, the hydraulic cylinder body 32 moves the hydraulic cylinder connecting head 35, the hydraulic cylinder connecting head 35 drives the pressure sensor 36 to move the transmission shaft 37, and then the intermediate connecting block 39 is moved, the intermediate connecting block 39 moves the riveting head mechanism 43;

[0032] The inside of the riveting head mechanism 43 is sequentially provided with an internal hexagonal cylindrical head shoulder screw 45, a spring 46, a riveting head body 47, a riveting head bottom plate 48, an intermediate guide plate 49 and a semicircular groove plate 50. The intermediate guide plate 49 is fixed to one side of the riveting head bottom plate 48, and the internal hexagonal cylindrical head shoulder screw 45 is fixed in the riveting head bottom plate 48 and the intermediate guide plate 49. The spring 46 is wound outside the internal hexagonal cylindrical head shoulder screw 45. The internal hexagonal cylindrical head shoulder screw 45 is connected with the riveting head body 47 at one end. The semicircular groove plate 50 is slidably arranged outside the internal hexagonal cylindrical head shoulder screw 45. The riveting head body 47 extends into the semicircular groove plate 50. One end of the spring 46 extends into the semicircular groove plate 50, and the other end of the spring 46 is arranged into the intermediate guide plate 49.

[0033] The semicircular groove plate 50 first contacts the support pipe component 11, and then moves to make the riveting head body 47 extend out. With the movement of the riveting head mechanism 43, the riveting head body 47 rivets the support pipe component 11. Similarly, the intermediate nest pressing mechanism 8 and the right and left riveting mechanisms 7, 9 move in the same way.

[0034] In use, the support pipe component 11 is placed in the position of the part, and then the left and right positioning mechanisms 6, 10 are simultaneously actuated. The cylinders drive the cylinder connecting shaft 17 to move, and the cylinder connecting shaft 17 drives the fixed shaft sliding block 21 to move to fix the support pipe component 11. Then the lower positioning cylinder body 31 is started, and the lower positioning cylinder body 31 drives the first floating joint 27 to move, and the first floating joint 27 drives the connecting block body 26 to move, and the connecting block body 26 drives the connecting rod 25 to move, and the connecting rod 25 drives the ultragel pressing head 24 to press on the top of the support pipe component 11. Then the left riveting mechanism front pushing cylinder 34 is started, and the left riveting mechanism front pushing cylinder 34 drives the transmission shaft 37 to move the I-shaped block 40 to the appropriate position. Then the hydraulic cylinder body 32 is started, and the hydraulic cylinder body 32 drives the hydraulic cylinder connecting head 35 to move, and the hydraulic cylinder connecting head 35 drives the pressure sensor 36 to move the transmission shaft 37, and then the intermediate connecting block 39 is moved, and the riveting head mechanism 43 is moved. Since the support pipe component 11 is fixed, the semicircular groove plate 50 first contacts the support pipe component 11, and then moves to make the riveting head body 47 extend out. With the movement of the riveting head mechanism 43, the riveting head body 47 rivets the support pipe component 11. Similarly, the intermediate nest pressing mechanism 8 and the right and left riveting mechanisms 7, 9 move in the same way. After processing, the part is taken out. Different products of the present application only switch the riveting mechanism part, and the rest is shared, which reduces the cost of equipment. At the same time, it also has an error prevention function. When the wrong part is taken for processing, the support pipe component 11 cannot be placed in the riveting position, and the hard limit error prevention is achieved.

[0035] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A riveting device for a car wiper assembly support tube, characterized by: The invention comprises an outer frame (1), a riveting mechanism body (2), a quick-connect quick-install structure (3) and an upper stand (4), wherein the quick-connect quick-install structure (3) is provided on both sides of the top of the outer frame (1), the riveting mechanism body (2) is provided on both sides of the center of the top of the outer frame (1), the top of the outer frame (1) is provided with an upper stand (4), the outside of the top of the outer frame (1) is provided with a hydraulic station (5), the right side of the outside of the outer frame (1) is provided with a left riveting mechanism body (7) and a right riveting mechanism (9), the left riveting mechanism body (7) is provided on the left side of the top of the outer frame (1), and the right riveting mechanism (9) is provided on the top of the outer frame (1). On the right side, a left positioning mechanism (6) is provided at a position near the left riveting mechanism body (7) on the top of the outer frame (1), a right positioning mechanism (10) is provided at a position near the right riveting mechanism (9) on the top of the outer frame (1), an intermediate fixed support tube mechanism (12) is provided at the center position of the top of the outer frame (1), an intermediate pressing nest mechanism (8) is provided at a position near the intermediate fixed support tube mechanism (12) on the top of the outer frame (1), and a support tube component (11) is provided between the left positioning mechanism (6), the left riveting mechanism body (7), the right riveting mechanism (9), the right positioning mechanism (10) and the intermediate fixed support tube mechanism (12); The interior of the left riveting mechanism body (7) includes a hydraulic cylinder body (32), a left riveting mechanism forward cylinder (34) and a linear guide rail (41), the linear guide rail (41) is mounted on the outer frame (1), an I-shaped block (40) is slidably provided on the linear guide rail (41), the left riveting mechanism forward cylinder (34) is fixed to the top of the outer frame (1) through a bracket, the output end of the left riveting mechanism forward cylinder (34) is connected to a second floating joint (38), the second floating joint (38) is connected to the I-shaped block (40), a hydraulic cylinder mounting plate (33) is fixed to the top of one side of the I-shaped block (40), the hydraulic cylinder mounting plate (33) is fixed to the top of the one side of the I-shaped block (40), and the hydraulic cylinder mounting plate (33) is fixed to the top of the one side of the I-shaped block (40). ) is provided with a hydraulic cylinder body (32) on one side, the output end of the hydraulic cylinder body (32) is connected to a hydraulic cylinder connector (35), one side of the hydraulic cylinder connector (35) is connected to a pressure sensor (36), one side of the pressure sensor (36) has its own conduction shaft (37), one side of the conduction shaft (37) is provided with an intermediate connecting block (39), one side of the intermediate connecting block (39) and the inside of the I-shaped block (40) is provided with a rivet head mechanism (43), one side of the top of the linear guide rail (41) is fixed with a limit block (42), and the intermediate pressure nest mechanism (8) and the right pressure riveting mechanism (9) have the same structure as the left pressure riveting mechanism body (7).

2. The riveting equipment for automobile wiper assembly support tube according to claim 1, characterized in that: The left positioning mechanism (6) includes a left support output shaft positioning support block (13) inside, the left support output shaft positioning support block (13) is mounted on the top of the outer frame (1) by bolts, a left positioning cylinder mounting plate (14) is fixed on the top of the left support output shaft positioning support block (13), a left positioning cylinder body (15) is fixed on the top of the left positioning cylinder mounting plate (14), a support rocker arm limit block (16) is fixed on the outside of the left positioning cylinder mounting plate (14), the output end of the left positioning cylinder body (15) is connected to the cylinder connecting shaft (17), the back of the support rocker arm limit block (16) is fixed to the left support output shaft limit block (19), the cylinder connecting shaft (17) is connected to a fixed shaft slider (21), a support body (18) is provided on the fixed shaft slider (21), and a pressure plate (20) is provided on the support body (18). The structure of the right positioning mechanism (10) is the same as that of the left positioning mechanism (6).

3. The riveting equipment for automobile wiper assembly support tube according to claim 1, characterized in that: The interior of the intermediate fixed support tube mechanism (12) includes a support rod (22), a support tube fixing block (23) is fixed on the top of the support rod (22), a downward pressure positioning cylinder mounting plate (28) is fixed on the top of the support tube fixing block (23), a downward pressure positioning cylinder body (31) is fixed near the front of the top of the riveting mechanism body (2), the output end of the downward pressure positioning cylinder body (31) is connected to a first floating joint (27), the bottom of the first floating joint (27) is connected to a connecting block (26), the two sides of the bottom of the connecting block (26) are connected to connecting rods (25), the bottom of the connecting rod (25) is connected to a high-pressure rubber head (24), linear bearings (29) are fixed on both sides of the top of the downward pressure positioning cylinder mounting plate (28), and guide shafts (30) are fixed on both sides of the top of the connecting block (26), and the guide shaft (30) passes through the linear bearing (29) and extends out.

4. The riveting equipment for automobile wiper assembly support tube according to claim 1, characterized in that: The interior of the rivet head mechanism (43) is provided with a hexagonal cylindrical head shoulder screw (45), a spring (46), a rivet head body (47), a rivet head base plate (48), an intermediate guide plate (49) and a semicircular groove plate (50) in sequence, and the intermediate guide plate (49) is fixed to one side of the rivet head base plate (48).

5. The riveting equipment for automobile wiper assembly support tube according to claim 4, characterized in that: A hexagon socket head shoulder screw (45) is fixed in the rivet head base plate (48) and the intermediate guide plate (49), a spring (46) is coiled on the outside of the hexagon socket head shoulder screw (45), one end of the hexagon socket head shoulder screw (45) is connected to the rivet head body (47), a semicircular slot plate (50) is slidably provided on the outside of the hexagon socket head shoulder screw (45), the rivet head body (47) extends into the semicircular slot plate (50), one end of the spring (46) extends into the semicircular slot plate (50), and the other end of the spring (46) is set in the intermediate guide plate (49).

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