Universal vehicle interior testing fixture

By designing a general-purpose vehicle interior inspection tool, the synergy of multiple positioning and support components is used to solve the problem that the shell is prone to local misalignment during positioning and maintenance, and the accuracy of maintenance and overall use effect are improved.

CN222774385UActive Publication Date: 2025-04-18YUKE PLASTICS XIAMEN CO LTD
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Patent Information

Application Number
CN202421251904.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-03
Publication Date
2025-04-18
Estimated Expiration
2034-06-03

AI Technical Summary

Technical Problem

The existing shell is prone to partial misalignment during positioning and maintenance, resulting in a decrease in maintenance accuracy and reducing the overall use effect.

Method used

A general-purpose vehicle interior inspection tool is designed, including a detection table, a crimp assembly, a support positioning assembly, an edge support assembly, a reference positioning module and other components. Through the synergy of these components, the housing can be stably positioned and supported, ensuring the accuracy of maintenance.

Benefits of technology

Through this inspection tool, local misalignment of the housing during positioning and maintenance can be effectively avoided, and the accuracy of maintenance and overall use effect can be improved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the field of positioning detection tools, in particular to a universal vehicle interior detection tool. The technical problems that a shell is directly pressed down to be positioned, then overhaul measurement is carried out, according to the curvature of the shell, local dislocation is prone to occurring during direct pressing and detection, the overhaul accuracy of the shell is lowered, and the overall using effect is reduced are solved. According to the technical scheme, the universal vehicle interior testing fixture comprises a detection table, a pressing buckle assembly, a supporting and positioning assembly, an edge supporting assembly, a reference positioning module, a first pre-positioning assembly, a second pre-positioning assembly, a third pre-positioning assembly and a pressing buckle locking assembly. The pressing buckle assembly can be used for supporting the shell to keep overall balance and stability, the pressing buckle locking assembly is located at the edges of the two ends of the detection table and is flush with the supporting positioning assembly, and the two ends of the shell can be positioned.
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Description

Technical Field

[0001] The utility model relates to the field of positioning inspection tools, in particular to a universal vehicle interior inspection tool. Background Art

[0002] The sunroof generally refers to a body part installed on the top of the car, the main material of which is glass. It can be opened and closed by a motor drive to increase ventilation and lighting in the car. The front pillar generally refers to the front pillar in the car body structure, which is commonly known as the A-pillar. It is located between the engine hood and the front windshield and plays a role in supporting the roof and protecting the occupants. The shell refers to a certain combined shell structure related to the car sunroof and the front pillar (A-pillar). It is a reinforcement or protection structure of the connection part between the sunroof and the front pillar to improve the strength and rigidity of the entire roof. The existing shell, during use, is directly pressed down for positioning, and then inspected and measured. According to the curvature of the shell, it is directly pressed down, and it is easy to be partially dislocated during inspection, which reduces the inspection accuracy and reduces the overall use effect. Therefore, we propose a universal vehicle interior inspection fixture to solve the above problems. Utility Model Content

[0003] In order to overcome the problem of the shell being directly pressed down for positioning and then subjected to inspection and measurement, due to the curvature of the shell, direct pressing may easily cause local misalignment during inspection, resulting in reduced inspection accuracy and lower overall use effect.

[0004] The technical scheme of the utility model is as follows: a universal vehicle interior inspection tool, comprising a testing platform, a buckle assembly, a support and positioning assembly, an edge support assembly, a reference positioning module, a first pre-positioning assembly, a second pre-positioning assembly, a third pre-positioning assembly and a buckle locking assembly; a plurality of buckle assemblies for pressing and positioning a shell to maintain overall stability are horizontally arranged near the edge of one side of the testing platform, a support and positioning assembly for supporting the shell to maintain overall balance and stability is linearly arranged at the edge of the buckle assembly away from the edge of the testing platform, an edge support assembly for linearly aligning with the buckle assembly and the support and positioning assembly to maintain the edge stability of the shell is arranged at the edge of one side of the testing platform away from the buckle assembly, buckle locking assemblies for positioning operations at both ends of the shell are arranged at the edges of both ends of the testing platform flush with the support and positioning assembly, a second pre-positioning assembly and a third pre-positioning assembly for cooperating with the positioning of the shell are arranged on one side of the buckle locking assembly, a first pre-positioning assembly for detection and positioning is arranged in the middle of the testing platform flush with the buckle assembly, and reference positioning modules for determining base points for measurement and calibration are arranged on all sides of the testing platform close to the buckle locking assembly.

[0005] Preferably, a buckle assembly is linearly arranged on the edge of the testing platform away from the edge, which can be used to support the shell to maintain overall balance and stability. The edge support assembly is linearly aligned with the buckle assembly and the support positioning assembly to maintain the edge stability of the shell. The buckle locking assembly is located at the edges of both ends of the testing platform and is flush with the support positioning assembly, so that the two ends of the shell can be positioned. The second pre-positioning assembly and the third pre-positioning assembly can cooperate to position the shell. The first pre-positioning assembly is located in the middle of the testing platform and is flush with the buckle assembly, so that detection and positioning can be performed. The reference positioning modules are distributed around the testing platform and close to the position of the buckle locking assembly to determine the base point for measurement and calibration, thereby improving the overall positioning and maintenance performance.

[0006] Preferably, a plurality of shock-absorbing grooves are crisscrossed on the testing table, shock-absorbing brackets are provided at the corners around the lower end of the testing table, and handles are provided on the supporting components near the edges of the testing table, through which the whole can be carried.

[0007] Preferably, the buckle assembly includes a first T-shaped support frame, a first positioning bolt, a guide plate, a buckle, a handle, a folding sleeve, a first movable pin, a connecting sleeve, a second movable pin and a buckle claw. Both ends of the first T-shaped support frame are provided with a first positioning bolt for installation, the top of the first T-shaped support frame is provided with a guide plate, the outer sleeve of the guide plate is provided with a buckle, one end of the buckle is provided with a handle, and a connecting pin is provided between the buckle and the guide plate. Grab the handle and make the buckle turn and position through the connecting pin.

[0008] Preferably, a folding sleeve is provided on the guide piece, a connecting sleeve is provided on the folding sleeve, the folding sleeve is movably adjusted with the guide piece through a first movable pin, the connecting sleeve is movably adjusted with the folding sleeve through a second movable pin, a claw is provided at the outer end of the connecting sleeve, the connecting sleeve is movably adjusted with the folding sleeve through the second movable pin, so that the claw positions the shell, thereby improving the overall positioning stability performance.

[0009] Preferably, the support positioning assembly includes a T-frame, second positioning bolts are provided on both sides of the lower side of the T-frame, a positioning hole is opened on the top of the T-frame, the edge support assembly includes a middle support platform, an arc-shaped support platform, a step platform, a third positioning bolt and a fourth positioning bolt, the middle support platform is horizontally provided with three groups, arc-shaped support platforms are distributed on both sides of the three groups of middle support platforms, a step platform is provided on the middle support platform, a third positioning bolt is provided below the step platform, arc grooves are provided on the inner and outer sides of the arc-shaped support platform, a fourth positioning bolt is provided below the inner side of the arc-shaped support platform, so that its side corresponds to the step platform on the middle support platform, and the extending direction of the two ends corresponds to the arc-shaped support platform, and then the swing frame is driven by the tension bolts to position the two ends of the shell with its buckle head.

[0010] Preferably, the reference positioning module includes a protective cover, a reference plate, a connecting belt and a fifth positioning bolt. A protective cover is matched on one side of the reference plate, a connecting belt is provided on one end of the protective cover, and the fifth positioning bolt drives the protective cover to move through the connecting belt. A reference hole is opened in the center of the reference plate, and the reference calibration operation can be performed using the reference hole.

[0011] Preferably, the first pre-positioning component, the second pre-positioning component and the third pre-positioning component are all arranged with the same structure, and the first pre-positioning component, the second pre-positioning component and the third pre-positioning component all include a balance plate, a sixth positioning bolt, a spring rope, a sleeve, a positioning point and a tension bolt, both ends of the balance plate are provided with a sixth positioning bolt, the middle part of the balance plate is provided with a sleeve, the center of the sleeve is provided with a positioning point, the top of the positioning point is provided with a tension bolt, the outer end of the positioning point is provided with a spring extending to the balance plate, the inside of the spring rope is provided with a spring damper, the buckle locking component includes a second T-shaped support frame, a swing frame, an adjusting bolt and a buckle head, the top of the second T-shaped support frame is provided with a movable groove, the inside of the movable groove is provided with a swing frame, the top of the swing frame is provided with a buckle head, the rear end of the swing frame is provided with an adjusting bolt, and the swing frame is provided with a positioning through hole corresponding to the positioning point, the positioning point is pulled out of the sleeve in turn, cooperated with the swing frame, passed through the positioning through hole, adjusted and positioned by the adjusting bolt, and installed and positioned on the shell.

[0012] Beneficial effects of the utility model:

[0013] 1. According to the previous shell, it is directly pressed down for positioning, and then maintenance and measurement are carried out. According to the curvature of the shell, it is directly pressed down, and local dislocation is easy to occur during detection, which causes the accuracy of maintenance to decrease, reducing the overall use effect. The difference is that the shell can be pressed and positioned to maintain overall stability through the buckle assembly. The buckle assembly is linearly arranged on the edge of the detection table away from the edge, which can be used to support the shell to maintain overall balance and stability. The edge support assembly and the buckle assembly are linearly aligned with the support positioning assembly to keep the edge of the shell stable. The buckle locking assembly is located at the edges of both ends of the detection table and is flush with the support positioning assembly, so that the two ends of the shell can be positioned. The second pre-positioning assembly and the third pre-positioning assembly can cooperate to position the shell. The first pre-positioning assembly is located in the middle of the detection table and is flush with the buckle assembly, so that detection and positioning can be carried out. The reference positioning modules are distributed around the detection table close to the position of the buckle locking assembly, so the base point can be determined for measurement and calibration, thereby improving the overall positioning and maintenance performance.

[0014] 2. When placing, drop the shell directly onto the supporting positioning assembly, plug it into the corresponding positioning holes, observe the position of the material, make its side correspond to the step platform on the middle support platform, and the extension direction of both ends correspond to the arc-shaped support platform, and then drive the swing frame through the tightening bolts to position the buckle head at both ends of the shell, the folding sleeve is movably adjusted through the first movable pin and the guide piece, and the connecting sleeve is movably adjusted through the second movable pin and the folding sleeve, so that the buckle claw positions the shell to improve the overall positioning stability performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the testing platform of the utility model;

[0017] Figure 3 It is a schematic diagram of the buckle assembly of the utility model;

[0018] Figure 4 This is a schematic diagram of the support and positioning assembly of the utility model;

[0019] Figure 5 It is a schematic diagram of the edge support assembly of the utility model;

[0020] Figure 6 This is a schematic diagram of the arc-shaped support platform of the utility model;

[0021] Figure 7 This is a schematic diagram of a reference positioning module of the utility model;

[0022] Figure 8 This is a schematic diagram of the first pre-positioning component of the utility model.

[0023] Explanation of the reference numerals: 1. testing platform; 2. buckle assembly; 3. support and positioning assembly; 4. edge support assembly; 5. reference positioning module; 6. first pre-positioning assembly; 7. second pre-positioning assembly; 8. third pre-positioning assembly; 9. buckle locking assembly; 101. shock-absorbing bracket; 102. shock-absorbing groove; 103. handle; 201. first T-shaped support frame; 202. first positioning bolt; 203. guide plate; 204. buckle; 205. grip; 206. folding sleeve; 207. first movable pin; 208. connecting sleeve; 209. second movable pin; 210. buckle claw; 301. positioning hole; 302. first Two positioning bolts; 401, middle support platform; 402, arc support platform; 403, step platform; 404, third positioning bolt; 405, arc groove; 406, fourth positioning bolt; 501, protective cover; 502, reference plate; 503, reference hole; 504, connecting belt; 505, fifth positioning bolt; 601, balance plate; 602, sixth positioning bolt; 603, spring rope; 604, plug sleeve; 605, positioning point; 606, tension bolt; 901, second T-shaped support frame; 902, movable groove; 903, swing frame; 904, adjusting bolt; 905, buckle head; 906, positioning through hole. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] See also Figure 1-2 The utility model provides an embodiment: a universal vehicle interior inspection tool, including a test platform 1, a buckle assembly 2, a support and positioning assembly 3, an edge support assembly 4, a reference positioning module 5, a first pre-positioning assembly 6, a second pre-positioning assembly 7, a third pre-positioning assembly 8 and a buckle locking assembly 9; a plurality of buckle assemblies 2 for pressing and positioning a housing to maintain overall stability are arranged horizontally near the edge of one side of the test platform 1, a support and positioning assembly 3 for supporting the housing to maintain overall balance and stability is arranged linearly along the buckle assembly 2 away from the edge of the test platform 1, and a side of the test platform 1 away from the buckle assembly 2 is provided. An edge supporting component 4 is provided at the edge of the shell for linearly aligning with the buckle component 2 and the supporting positioning component 3 to keep the edge of the shell stable; buckle locking components 9 are provided at the edges of both ends of the testing platform 1 and are flush with the supporting positioning component 3 for positioning operations at both ends of the shell; a second pre-positioning component 7 and a third pre-positioning component 8 for cooperating in positioning the shell are provided on one side of the buckle locking component 9; a first pre-positioning component 6 for detection and positioning is provided in the middle of the testing platform 1 and is flush with the buckle component 2; and reference positioning modules 5 for determining base points for measurement and calibration are provided on all sides of the testing platform 1 near the buckle locking components 9.

[0026] See also Figure 3-4In this embodiment, a plurality of shock-absorbing grooves 102 are crisscrossed on the testing platform 1, shock-absorbing brackets 101 are provided at the corners around the lower end of the testing platform 1, and handles 103 are provided on the supporting components 4 close to the edge of the testing platform 1, and the whole can be carried by the handles 103. The pressing assembly 2 includes a first T-shaped supporting frame 201, a first positioning bolt 202, a guide piece 203, a buckle 204, a grip 205, a folding sleeve 206, a first movable pin 207, a connecting sleeve 208, a second movable pin 209 and a buckle claw 210. Both ends of the first T-shaped supporting frame 201 are provided with first positioning bolts 202 for installation, a guide piece 203 is provided on the top of the first T-shaped supporting frame 201, a buckle 204 is provided on the outer sleeve of the guide piece 203, a grip 205 is provided at one end of the buckle 204, a connecting pin is provided between the buckle 204 and the guide piece 203, and the grip 205 is grasped so that the buckle 204 is specifically positioned through the connecting pin.

[0027] See also Figure 4-6 In this embodiment, a folding sleeve 206 is sleeved on the guide piece 203, and a connecting sleeve 208 is provided on the folding sleeve 206. The folding sleeve 206 is movably adjusted with the guide piece 203 through a first movable pin 207, and the connecting sleeve 208 is movably adjusted with the folding sleeve 206 through a second movable pin 209. A buckle 210 is provided at the outer end of the connecting sleeve 208, and the connecting sleeve 208 is movably adjusted with the folding sleeve 206 through the second movable pin 209, so that the buckle 210 positions the shell, thereby improving the overall positioning stability performance. The support positioning assembly 3 includes a T-frame, and second positioning bolts 302 are provided on both sides of the lower side of the T-frame. A positioning hole 301 is opened on the top of the T-frame, and the edge support assembly 4 includes a middle support platform 401, an arc-shaped A support platform 402, a stepped platform 403, a third positioning bolt 404 and a fourth positioning bolt 406, the middle support platform 401 is horizontally provided with three groups, and arc-shaped support platforms 402 are distributed on both sides of the three groups of middle support platforms 401, a stepped platform 403 is provided on the middle support platform 401, and a third positioning bolt 404 is provided below the stepped platform 403. Arc grooves 405 are provided on the inner and outer sides of the arc-shaped support platform 402, and a fourth positioning bolt 406 is provided below the inner side of the arc-shaped support platform 402, so that its side edges correspond to the stepped platform 403 on the middle support platform 401, and the extending directions of the two ends correspond to the arc-shaped support platform 402, and then the swing frame 903 is driven by the tightening bolts 606 to position its buckle heads 905 at the two ends of the shell.

[0028] See also Figure 1-8In this embodiment, the reference positioning module 5 includes a protective cover 501, a reference plate 502, a connecting belt 504 and a fifth positioning bolt 505. The protective cover 501 is matched on one side of the reference plate 502, and a connecting belt 504 is provided at one end of the protective cover 501. The fifth positioning bolt 505 drives the protective cover 501 to move through the connecting belt 504. A reference hole 503 is opened at the center of the reference plate 502. The reference hole 503 can be used to perform a reference calibration operation. The first pre-positioning component 6, the second pre-positioning component 7 and the third pre-positioning component 8 are all arranged with the same structure. The first pre-positioning component 6, the second pre-positioning component 7 and the third pre-positioning component 8 all include a balance plate 601, a sixth positioning bolt 602, a spring rope 603, a sleeve 604, a positioning point 605 and a tension bolt 606. Sixth positioning bolts 602 are provided at both ends of the balance plate 601, and the middle of the balance plate 601 A socket 604 is provided, a positioning point 605 is provided at the center of the socket 604, a tension bolt 606 is provided at the top of the positioning point 605, and a spring rope 603 is provided at the outer end thereof to extend to the balance plate 601. A spring damper is provided inside the spring rope 603. The buckle locking assembly 9 includes a second T-shaped support frame 901, a swing frame 903, an adjusting bolt 904 and a buckle head 905. A movable groove 902 is provided at the top of the second T-shaped support frame 901, a swing frame 903 is provided inside the movable groove 902, a buckle head 905 is provided at the top of the swing frame 903, an adjusting bolt 904 is provided at the rear end of the swing frame 903, and a positioning through hole 906 corresponding to the positioning point 605 is provided on the swing frame 903. The positioning point 605 is sequentially pulled out of the socket 604, matched with the swing frame 903, and passed through the positioning through hole 906, and adjusted and positioned by the adjusting bolt 904, and installed and positioned on the shell.

[0029] When working, the whole can be carried and operated by the handle 103 to a suitable position, and the shell can be directly placed on the support positioning component 3, and the positioning holes 301 are plugged into each other to observe the position of the material, so that its side corresponds to the step platform 403 on the middle support platform 401, and the extension direction of the two ends corresponds to the arc support platform 402, and then the swing frame 903 is driven by the loose bolt 606 to position the buckle head 905 at both ends of the shell, and the folding sleeve 206 is adjusted by the first movable pin 207 and the guide piece 203. The connecting sleeve 208 is movably adjusted with the folding sleeve 206 through the second movable pin 209, and the handle 205 is grasped so that the buckle 204 is turned and positioned through the connecting pin, so that the claw 210 positions the shell. The swing frame 903 is provided with a positioning through hole 906 corresponding to the positioning point 605. The positioning point 605 is pulled out of the plug sleeve 604 in turn, and the swing frame 903 cooperates with it, and the positioning is adjusted by the adjusting bolt 904 through the positioning through hole 906, and it is installed and positioned on the shell. The reference hole 503 can be used for reference calibration operation.

[0030] Through the above steps, the buckle component 2 is linearly arranged on the detection platform 1 away from the edge of the buckle component 2, which can be used to support the shell to maintain overall balance and stability. The edge support component 4 is linearly aligned with the buckle component 2 and the support positioning component 3, so that the edge of the shell can be kept stable. The buckle locking component 9 is located at the edges of both ends of the detection platform 1 and is flush with the support positioning component 3, so the two ends of the shell can be positioned. The second pre-positioning component 7 and the third pre-positioning component 8 can cooperate to position the shell. The first pre-positioning component 6 is located in the middle of the detection platform 1 and is flush with the buckle component 2, so detection and positioning can be performed. Through the reference positioning module 5, which is distributed around the detection platform 1 close to the buckle locking component 9, the base point can be determined for measurement and calibration, thereby improving the overall positioning and maintenance performance.

[0031] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A universal vehicle interior inspection tool, comprising a testing platform (1); characterized in that: The detection platform (1) further comprises a buckle assembly (2), a support and positioning assembly (3), an edge support assembly (4), a reference positioning module (5), a first pre-positioning assembly (6), a second pre-positioning assembly (7), a third pre-positioning assembly (8) and a buckle locking assembly (9); a plurality of buckle assemblies (2) for pressing and positioning the housing to maintain overall stability are arranged transversely on one side of the detection platform (1) near the edge; a support and positioning assembly (3) for supporting the housing to maintain overall balance and stability is arranged linearly on the edge of the detection platform (1) away from the buckle assembly (2); and a buckle assembly (2) and a support assembly (4) are arranged on the edge of the detection platform (1) away from the buckle assembly (2). The positioning component (3) is linearly aligned with the edge support component (4) for maintaining the edge stability of the shell; buckle locking components (9) are provided at the edges of both ends of the testing platform (1) and are flush with the support positioning component (3) for positioning operations at both ends of the shell; a second pre-positioning component (7) and a third pre-positioning component (8) for cooperating in positioning the shell are provided on one side of the buckle locking component (9); a first pre-positioning component (6) for testing and positioning is provided in the middle of the testing platform (1) and is flush with the buckle locking component (2); and reference positioning modules (5) for determining base points for measurement and calibration are provided on all four sides of the testing platform (1) near the buckle locking component (9).

2. A universal vehicle interior inspection tool according to claim 1, characterized in that: A plurality of groups of shock absorbing grooves (102) are arranged in a crisscross pattern on the testing platform (1), shock absorbing brackets (101) are arranged at the corners around the lower end of the testing platform (1), and handles (103) are arranged near the edge support components (4) on the testing platform (1).

3. A universal vehicle interior inspection tool according to claim 1, characterized in that: The buckle assembly (2) comprises a first T-shaped support frame (201), a first positioning bolt (202), a guide piece (203), a buckle (204), a handle (205), a folding sleeve (206), a first movable pin (207), a connecting sleeve (208), a second movable pin (209) and a buckle claw (210). Both ends of the first T-shaped support frame (201) are provided with first positioning bolts (202) for installation. The top of the first T-shaped support frame (201) is provided with a guide piece (203). The outer sleeve of the guide piece (203) is provided with a buckle (204). One end of the buckle (204) is provided with a handle (205). A connecting pin is provided between the buckle (204) and the guide piece (203).

4. A universal vehicle interior inspection tool according to claim 3, characterized in that: A folding sleeve (206) is sleeved on the guide piece (203), a connecting sleeve (208) is provided on the folding sleeve (206), the folding sleeve (206) is movably adjusted with the guide piece (203) through a first movable pin (207), the connecting sleeve (208) is movably adjusted with the folding sleeve (206) through a second movable pin (209), and a buckle claw (210) is provided at the outer end of the connecting sleeve (208).

5. The universal vehicle interior inspection tool according to claim 1, characterized in that: The support positioning assembly (3) includes a T-shaped frame, and second positioning bolts (302) are provided on both sides of the lower side of the T-shaped frame. A positioning hole (301) is provided on the top of the T-shaped frame. The edge support assembly (4) includes a middle support platform (401), an arc-shaped support platform (402), a step platform (403), a third positioning bolt (404) and a fourth positioning bolt (406). The middle support platform (401) is provided with three groups in a transverse manner. The three groups of middle support platforms (401) are provided with arc-shaped support platforms (402) on both sides. The middle support platform (401) is provided with a step platform (403). The step platform (403) is provided with a third positioning bolt (404) below. The inner and outer sides of the arc-shaped support platform (402) are provided with arc grooves (405). The inner and outer sides of the arc-shaped support platform (402) are provided with a fourth positioning bolt (406).

6. A universal vehicle interior inspection tool according to claim 1, characterized in that: The reference positioning module (5) comprises a protective cover (501), a reference plate (502), a connecting belt (504) and a fifth positioning bolt (505); one side of the reference plate (502) is matched with the protective cover (501); one end of the protective cover (501) is provided with a connecting belt (504); the fifth positioning bolt (505) drives the protective cover (501) to move via the connecting belt (504); and a reference hole (503) is provided at the center of the reference plate (502).

7. The universal vehicle interior inspection tool according to claim 1, characterized in that: The first pre-positioning assembly (6), the second pre-positioning assembly (7) and the third pre-positioning assembly (8) are all of the same structural arrangement. The first pre-positioning assembly (6), the second pre-positioning assembly (7) and the third pre-positioning assembly (8) all include a balance plate (601), a sixth positioning bolt (602), a spring rope (603), a plug sleeve (604), a positioning point (605) and a tension bolt (606). The balance plate (601) is provided with the sixth positioning bolt (602) at both ends, the balance plate (601) is provided with a plug sleeve (604) in the middle, the plug sleeve (604) is provided with a positioning point (605) at the center, and the top of the positioning point (605) is provided with a tension bolt (606). The outer end of the positioning point (605) is provided with a spring extending to the balance plate (601), the spring rope (603) is provided with a spring damper, the buckle locking assembly (9) includes a second T-shaped support frame (901), a swing frame (903), an adjusting bolt (904) and a buckle head (905), the top of the second T-shaped support frame (901) is provided with a movable groove (902), the inside of the movable groove (902) is provided with a swing frame (903), the top of the swing frame (903) is provided with a buckle head (905), the rear end of the swing frame (903) is provided with an adjusting bolt (904), and the swing frame (903) is provided with a positioning through hole (906) corresponding to the positioning point (605).