A tooling for limiting the gap between the tailgate and the top cover

Abstract

This invention belongs to the field of automotive technology, specifically a tailgate and roof gap limiting fixture, including a symmetrically designed left and right gap limiting mechanism, with a central X-direction reverse hooking mechanism between the left and right gap limiting mechanisms. Both the left and right gap limiting mechanisms are placed on the vehicle body and attached to the roof, and each has a tailgate gap windmill plug, which is positioned between the roof flange and the tailgate to control the tailgate's X-direction gap. The central X-direction reverse hooking mechanism is fixed to the vehicle body and has an operable clamping block, which is used to fit against the tailgate outer panel to achieve X-direction locking of the tailgate. This invention, through the tailgate and roof gap limiting fixture, ensures that the overlap gap between the tailgate and roof is qualified, minimizes the influence of human subjectivity, ensures the stability of assembly dimensions, and improves the aesthetics of the overall vehicle assembly.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, specifically to a tooling for limiting the gap between the tailgate and the roof. Background Technology

[0002] The surface difference between the joints of automotive exterior body panels is the primary factor determining the overall appearance quality of a vehicle. Among the exterior body panels, the tailgate is a relatively important exterior component, and its precision directly affects DTS (Design for Quality) indicators such as the matching accuracy with the side panels and taillights.

[0003] Factors such as component quality and accumulated manufacturing tolerances can lead to lower vehicle body precision, affecting the assembly accuracy of the tailgate. This necessitates post-assembly adjustments to the tailgate's gap and surface difference. The gap between the tailgate and the roof is primarily adjusted by changing the front-to-back position of the tailgate hinges. This directly impacts the surface difference between the tailgate and the left and right sides of the vehicle body, which is the height difference between the tailgate and the left and right sides of the body. Manual adjustment of this process would result in the tailgate and roof's surface difference and gap not meeting process requirements, and the need for operators to simultaneously inspect and adjust would disrupt the production cycle.

[0004] Under current technological conditions, the assembly of the tailgate of pickup trucks and SUVs generally relies on the experience of workers to make adjustments in the welding workshop. After the final assembly of the exterior parts is completed, further adjustments are made based on the exterior assembly. This leads to the following disadvantages: 1. Assembly consistency cannot be guaranteed, and assembly quality is greatly affected by employee skills.

[0005] 2. The second adjustment of the final assembly resulted in a waste of manpower and resources.

[0006] 3. Adjustments during final assembly can easily damage the paint and affect the vehicle's corrosion resistance. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A tailgate and top cover gap limiting fixture includes a symmetrically designed left gap limiting mechanism and a right gap limiting mechanism, and a central X-direction reverse hooking mechanism is provided between the left gap limiting mechanism and the right gap limiting mechanism. Both the left-side gap limiting mechanism and the right-side gap limiting mechanism are used to be placed on the vehicle body and attached to the top cover. They have a tailgate gap windmill plug, which is used to be set between the top cover flange and the tailgate to control the tailgate X-direction gap. The central X-direction reverse hooking mechanism is used to fix it to the vehicle body and has an operable clamping block, which is used to fit against the outer panel of the tailgate to achieve X-direction locking of the tailgate.

[0008] As a preferred embodiment of the tailgate and top cover gap limiting fixture described in this invention, the left gap limiting mechanism includes a first adapter block, a first strong magnet fixed on the lower surface of the first adapter block for adsorbing onto the top cover, a first top cover profile block fixed on the side of the first adapter block for fitting with the top cover flange, and a first handle fixed on the upper surface of the first adapter block.

[0009] As a preferred embodiment of the tailgate and top cover gap limiting fixture of the present invention, a first adjusting shim is provided between the first adapter block and the first top cover molding block, and the first adjusting shim is used to adjust the Y-axis dimension of the first top cover molding block.

[0010] As a preferred embodiment of the tailgate and top cover gap limiting fixture described in this invention, the tailgate gap windmill block includes a first tailgate gap windmill block A and a first tailgate gap windmill block B. The first tailgate gap windmill block A and the first tailgate gap windmill block B are both fixed on the side of the first adapter block, and the first tailgate gap windmill block A and the first tailgate gap windmill block B correspond to the upper tolerance limit and the lower tolerance limit, respectively.

[0011] As a preferred embodiment of the tailgate and top cover gap limiting fixture described in this invention, the first tailgate gap windmill plug A and the first tailgate gap windmill plug B are both composed of multiple windmill-shaped plugs, which are used to adjust and control the thickness of the gap by rotation.

[0012] As a preferred embodiment of the tailgate and top cover gap limiting fixture described in this invention, the central X-direction reverse hooking mechanism includes a transition block and a connecting block. Both ends of the transition block are fixed with clamping blocks. A linkage mechanism slides on the transition block, and an operating handle is fixed on the linkage mechanism. Both ends of the connecting block are fixed with limiting blocks. One side of the connecting block is rotatably connected to a frame via a rotating shaft, and one end of the linkage mechanism passes through the frame. A spring is fitted onto the linkage mechanism, and the spring is located between the transition block and the frame. The limiting block is C-shaped and is used to engage with the waist-shaped hole on the rear crossbeam of the top cover.

[0013] As a preferred embodiment of the tailgate and top cover gap limiting fixture described in this invention, the right-side gap limiting mechanism includes a second adapter block, a second strong magnet fixed to the lower surface of the second adapter block for adsorbing onto the top cover, a second top cover profile block fixed to the side of the second adapter block for fitting with the top cover flange, and a second handle fixed to the upper surface of the second adapter block.

[0014] As a preferred embodiment of the tailgate and top cover gap limiting fixture described in this invention, a second adjusting shim is provided between the second adapter block and the second top cover molding block, and the second adjusting shim is used to adjust the Y-axis dimension of the second top cover molding block.

[0015] As a preferred embodiment of the tailgate and top cover gap limiting tooling described in this invention, the tailgate gap windmill block further includes a second tailgate gap windmill block A and a second tailgate gap windmill block B. The second tailgate gap windmill block A and the second tailgate gap windmill block B are both fixed on the side of the second adapter block, and the second tailgate gap windmill block A and the second tailgate gap windmill block B correspond to the upper tolerance limit and the lower tolerance limit, respectively.

[0016] As a preferred embodiment of the tailgate and top cover gap limiting fixture described in this invention, the second tailgate gap windmill block A and the second tailgate gap windmill block B are both composed of multiple windmill-shaped blocks, which are used to adjust and control the thickness of the gap by rotation.

[0017] Compared with existing technologies: 1. By using a tailgate and roof gap limiting fixture, the overlap gap between the tailgate and roof is ensured to be qualified, minimizing the subjective influence of humans, ensuring the stability of assembly dimensions, and improving the aesthetics of the whole vehicle assembly. 2. After installation, the internal gap of the tailgate does not need to be manually adjusted, reducing the workload of welding personnel and improving assembly efficiency. At the same time, no secondary adjustment is required during final assembly, ensuring the quality of the paint surface at the tailgate installation location and guaranteeing corrosion resistance. 3. It greatly reduces the assembly skills required of operators, reduces the labor intensity of employees, and improves production efficiency; 4. This invention has a simple design, low manufacturing cost, low price, and is easy to promote and apply in the future. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the present invention; Figure 2 This is a bottom view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 This is a schematic diagram of the left-side gap limiting mechanism of the present invention; Figure 5 This is a schematic diagram of the right-side gap limiting mechanism of the present invention; Figure 6 This is a front view of the left-side gap limiting mechanism of the present invention; Figure 7 This is a front view of the right-side gap limiting mechanism of the present invention; Figure 8This is a rear view of the left-side gap limiting mechanism of the present invention; Figure 9 This is a rear view of the right-side gap limiting mechanism of the present invention; Figure 10 This is a left view of the left-side gap limiting mechanism of the present invention; Figure 11 This is a left view of the right-side gap limiting mechanism of the present invention; Figure 12 This is a right view of the left-side gap limiting mechanism of the present invention; Figure 13 This is a right view of the right-side gap limiting mechanism of the present invention; Figure 14 This is a schematic diagram of the X-direction reverse hooking mechanism in the middle of the present invention; Figure 15 This is a front view of the X-direction reverse hooking mechanism in the middle of the present invention; Figure 16 This is a rear view of the X-direction reverse hooking mechanism in the middle of the present invention; Figure 17 This is a left view of the X-direction reverse hooking mechanism in the middle of the present invention; Figure 18 This is a right view of the X-direction reverse hooking mechanism in the middle of the present invention; Figure 19 This is a schematic diagram of the 2C-type hook pin limiting mechanism in the X-direction reverse hooking mechanism of the present invention; Figure 20 This is a schematic diagram of the vehicle body assembly of the present invention; Figure 21 This is an enlarged schematic diagram of a portion 1 of the vehicle body assembly of the present invention; Figure 22 This is an enlarged schematic diagram of a portion 2 of the vehicle body assembly of the present invention; Figure 23 This is a magnified schematic diagram of a portion of the vehicle body assembly of the present invention.

[0019] In the diagram: Left side gap limiting mechanism 1, first handle 11, first adapter block 12, first top cover molding block 13, first tailgate gap windmill plug A14, first tailgate gap windmill plug B15, first strong magnet 16, middle X-direction reverse hooking mechanism 2, operating handle 21, linkage mechanism 22, adapter block 23, spring 24, pressing block 25, frame 26, rotating shaft 27, connecting block 28, limiting block 29, right side gap limiting mechanism 3, second handle 31, second adapter block 32, second top cover molding block 33, second tailgate gap windmill plug A34, second tailgate gap windmill plug B35, second strong magnet 36, tailgate 4, top cover rear crossbeam waist-shaped hole 5, top cover 6. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0021] This invention provides a tooling for limiting the gap between the tailgate and the top cover. Please refer to [link / reference]. Figures 1-23 It includes a symmetrically designed left gap limiting mechanism 1 and a right gap limiting mechanism 3, and a central X-direction reverse hooking mechanism 2 is provided between the left gap limiting mechanism 1 and the right gap limiting mechanism 3. The left-side gap limiting mechanism 1 is placed on the vehicle body and attached to the top cover 6. It has a tailgate gap windmill plug, which is set between the top cover 6 flange and the tailgate 4 to control the tailgate 4X-direction gap.

[0022] The left-side gap limiting mechanism 1 includes a first handle 11, a first adapter block 12, a first top cover molding block 13, and a first strong magnet 16; The first adapter block 12 primarily connects the first tailgate gap windmill plug A14 and the first tailgate gap windmill plug B15, the first handle 11, the first top cover molding block 13, and the first strong magnet 16, ensuring the accurate positioning of the tailgate top cover gap limiting fixture. The first strong magnet 16 is fixed to the lower surface of the first adapter block 12 and is used to adhere to the top cover 6. A strong magnet insertion hole is provided on the lower surface of the first adapter block 12, and the first strong magnet 16 is glued and fixed to the strong magnet insertion hole on the first adapter block 12. The first strong magnet 16 mainly uses the strong magnetic attraction to fix the entire limiting fixture to the upper surface of the top cover, preventing it from slipping off the vehicle body during use. The first top cover molding block 13 is fixed to the side of the first adapter block 12. The first top cover molding block 13 is used to fit with the flange of the top cover 6. The side of the first adapter block 12 is also provided with two locking screw holes and one internal hex bolt hole. At the same time, the first top cover molding block 13 is also provided with two locking screw holes and one internal hex bolt hole. The first top cover molding block 13 can be fixed to the side of the first adapter block 12 by two locking screws and internal hex bolts. The first top cover molding block 13 mainly plays the role of molding and limiting. By fitting the first top cover molding block 13 with the flange of the top cover, the position of the tailgate top cover gap limiting tool is fixed, thereby ensuring the position of the first tailgate gap windmill plug A. 14 / The positional accuracy of the first tailgate gap windmill plug block B15; A first handle 11 is fixed on the upper surface of the first adapter block 12, and a screw hole is provided on the upper surface of the first adapter block 12 for tightening and fixing the first handle 11 for easy operation and handling; A first adjusting shim is placed between the first adapter block 12 and the first top cover molding block 13. The first adjusting shim is used to adjust the Y-axis dimension of the first top cover molding block 13. It can be matched according to the actual object on site. By increasing or decreasing the number of first adjusting shims, the Y-axis dimension of the first top cover molding block 13 can be adjusted to ensure that the inner surface of the first top cover molding block 13 fits with the top cover flange, thereby ensuring the position of the tailgate top cover gap limiting fixture is fixed; The tailgate gap windmill The plug includes a first tailgate gap windmill plug A14 and a first tailgate gap windmill plug B15. Both the first tailgate gap windmill plug A14 and the first tailgate gap windmill plug B15 are fixed to the side of the first adapter block 12, and the first tailgate gap windmill plug A14 and the first tailgate gap windmill plug B15 correspond to the upper tolerance limit and the lower tolerance limit, respectively. Both the first tailgate gap windmill plug A14 and the first tailgate gap windmill plug B15 are composed of multiple windmill-shaped plugs, which are used to adjust and control the thickness of the gap by rotating. A locking screw hole is provided on the other side of the first adapter block 12, and the first tailgate gap windmill plug A14 and the first tailgate gap windmill plug B15 can be fixed by locking screw.The first tailgate gap windmill plug A14 and the first tailgate gap windmill plug B15 are composed of 5 windmill-shaped plugs; among them, the first tailgate gap windmill plug A14 corresponds to the upper tolerance limit, and the first tailgate gap windmill plug B15 corresponds to the lower tolerance limit; the thickness difference of each plug is 0.2mm, which facilitates the selection of appropriate size by rotating the tailgate gap windmill plug according to the actual vehicle assembly, ensuring that the plug is between the top cover flange and the tailgate inner panel flange (the inner surface fits with the top cover flange, and the outer surface fits with the tailgate inner panel flange), and ensuring that the gap between the tailgate 4 and the top cover 6 meets the design requirements.

[0023] During use, the first strong magnet 16 adsorbs the limiting fixture onto the roof of the vehicle body, so that the inner surface of the first roof molding block 13 fits with the side flange of the roof. At this time, the first tailgate gap windmill plug A14 / first tailgate gap windmill plug B15 is located between the roof flange and the tailgate. The tailgate gap windmill plug controls the tailgate X-direction gap, thereby ensuring the consistency of the X-direction gap during the assembly of the entire tailgate.

[0024] The central X-direction reverse hooking mechanism 2 is used to fix it to the vehicle body and has an operable clamping block 25. The clamping block 25 is used to fit against the outer panel of the tailgate 4 to achieve X-direction locking of the tailgate 4.

[0025] The central X-direction reverse hooking mechanism 2 includes an operating handle 21, a linkage mechanism 22, a transition block 23, a spring 24, a pressing block 25, a frame 26, a rotating shaft 27, a connecting block 28, and a limiting block 29. Both ends of the adapter block 23 are fixed with clamping blocks 25. The clamping blocks 25 mainly serve to limit the X-direction clamping of the mechanism, making the clamping blocks 25 fit against the tailgate outer panel, thereby achieving the purpose of limiting the mechanism to clamp and fix in the X-direction reverse direction. The clamping blocks 25 are fixed to both ends of the adapter block 23 by locking screws. A linkage mechanism 22 slides on the adapter block 23. An operating handle 21 is fixed on the linkage mechanism 22. The operating handle 21 is fixed to the linkage mechanism 22 by fastening nuts. By raising / lowering the operating handle 21, the linkage mechanism 22 can be moved back and forth along the bushing hole reserved in the adapter block 23, thereby realizing the clamping and releasing of the spring 24. Both ends of the connecting block 28 are fixed with limit blocks 29. One side of the connecting block 28 is rotatably connected to a frame 26 through a rotating shaft 27, and one end of the linkage mechanism 22 passes through the frame 26. The frame 26 mainly serves to connect the linkage mechanism 22 and the rotating shaft 27. The function of the mechanism is to rotate the frame 26 along the rotating axis 27 as the operating handle 21 is raised / lowered, thereby pushing the clamping block 25 forward along the linkage mechanism 22, compressing the spring 24, and making the X-direction clamping block 25 fit against the outer panel of the tailgate until the spring 24 is compressed to its limit, thus achieving X-direction locking of the tailgate; the linkage mechanism 22 is fitted with the spring 24, and the spring 24 is located between the adapter block 23 and the frame 26; the limiting block 29 is C-shaped and is used to snap onto the waist-shaped hole 5 of the rear crossbeam of the top cover, so that the limiting block 29 fits against the surface where the hole is located, fixing the middle X-direction reverse hooking mechanism 2 to the vehicle body. The limiting block 29 mainly plays the role of positioning and fixing the limiting mechanism, as detailed in the appendix. Figure 19 The limiting block 29 is fixed to both ends of the connecting block 28 by locking screws.

[0026] The right-side gap limiting mechanism 3 is used to be placed on the vehicle body and attached to the top cover 6. It has a tailgate gap windmill plug block. The tailgate gap windmill plug block is used to be set between the top cover 6 flange and the tailgate 4 to control the tailgate 4X-direction gap. The right-side gap limiting mechanism 3 includes a second handle 31, a second adapter block 32, a second top cover molding block 33, and a second strong magnet 36; The second adapter block 32 primarily connects the second tailgate gap windmill plug A34 and the second tailgate gap windmill plug B35, the second handle 31, the second top cover molding block 33, and the second strong magnet 36, ensuring the accurate positioning of the tailgate top cover gap limiting fixture. The second strong magnet 36 is fixed to the lower surface of the second adapter block 32 and is used to adhere to the top cover 6. A strong magnet insertion hole is provided on the lower surface of the second adapter block 32, and the second strong magnet 36 is glued and fixed to the strong magnet insertion hole on the second adapter block 32. The second strong magnet 36 mainly uses the strong magnetic attraction to fix the entire limiting fixture to the upper surface of the top cover, preventing it from slipping off the vehicle body during use. The second top cover is fixed to the side of the second adapter block 32, which is used to fit with the flange of the top cover 6. The side of the second adapter block 32 is also provided with two locking screw holes and one internal hex bolt hole. The second top cover is fixed with two locking screw holes and one internal hex bolt hole. The second top cover is fixed to the side of the second adapter block 32 by two locking screws and one internal hex bolt. The second top cover is mainly used for shaping and limiting. By fitting the second top cover is fitted with the flange of the top cover, the position of the tailgate top cover gap limiting fixture is fixed, thereby ensuring the position of the second tailgate gap windmill plug A. 34 / The positional accuracy of the second tailgate gap windmill plug block B35; a second handle 31 is fixed on the upper surface of the second adapter block 32, and a screw hole is provided on the upper surface of the second adapter block 32 for tightening and fixing the second handle 31 for easy operation and handling; a second adjusting shim is placed between the second adapter block 32 and the second top cover molding block 33. The second adjusting shim is used to adjust the Y-axis dimension of the second top cover molding block 33. It can be matched according to the actual site. By increasing or decreasing the number of second adjusting shims, the Y-axis dimension of the second top cover molding block 33 can be adjusted to ensure that the inner surface of the second top cover molding block 33 fits with the top cover flange, thereby ensuring the position of the tailgate top cover gap limiting fixture is fixed; the tailgate gap windmill The plug also includes a second tailgate gap windmill plug A34 and a second tailgate gap windmill plug B35. The second tailgate gap windmill plug A34 and the second tailgate gap windmill plug B35 are both fixed to the side of the second adapter block 32, and the second tailgate gap windmill plug A34 and the second tailgate gap windmill plug B35 correspond to the upper tolerance limit and the lower tolerance limit, respectively. The second tailgate gap windmill plug A34 and the second tailgate gap windmill plug B35 are both composed of multiple windmill-shaped plugs, which are used to adjust and control the thickness of the gap by rotating. A locking screw hole is provided on the other side of the second adapter block 32, and the second tailgate gap windmill plug A34 and the second tailgate gap windmill plug B35 can be fixed by locking screw.The second tailgate gap windmill plug A34 and the second tailgate gap windmill plug B35 are composed of 5 windmill-shaped plugs; among them, the second tailgate gap windmill plug A34 corresponds to the upper tolerance limit, and the second tailgate gap windmill plug B35 corresponds to the lower tolerance limit; the thickness difference of each plug is 0.2mm, which facilitates the selection of appropriate size by rotating the tailgate gap windmill plug according to the actual vehicle assembly, ensuring that the plug is between the top cover flange and the tailgate inner panel flange (the inner surface fits with the top cover flange, and the outer surface fits with the tailgate inner panel flange), and ensuring that the gap between the tailgate 4 and the top cover 6 meets the design requirements.

[0027] During use, the limiting fixture is attracted to the roof of the vehicle by the second strong magnet 36, so that the inner surface of the second roof molding block 33 fits with the side flange surface of the roof. At this time, the second tailgate gap windmill plug A34 / second tailgate gap windmill plug B35 is located between the roof flange and the tailgate. The tailgate gap windmill plug controls the tailgate X-direction gap, thereby ensuring the consistency of the X-direction gap during the assembly of the entire tailgate.

[0028] In practical use, the operating steps for those skilled in the art are as follows: The left-side gap limiting mechanism 1 and the right-side gap limiting mechanism 3 are placed on the vehicle body and attracted to the roof by the magnetic force of strong magnets (including the first strong magnet 16 and the second strong magnet 36). This ensures that the inner surface of the roof contour block (including the first roof contour block 13 and the second roof contour block 33) fits with the flanged surface of the roof side, thus guaranteeing the fixed position of the tailgate roof gap limiting mechanism. Next, the limiting block 29 of the central X-direction reverse hooking mechanism 2 is engaged with the waist-shaped hole in the inner plate of the roof rear crossbeam, so that the waist-shaped hole 5 of the roof rear crossbeam fits with the surface where the hole is located, thus fixing the central X-direction reverse hooking mechanism 2 to the vehicle body. At this time, the central X-direction reverse hooking mechanism 2 is in the drooping open state.

[0029] When manually installing the tailgate onto the vehicle body, ensure the inner flange of the tailgate panel aligns with the outer surface of the tailgate gap windmill plug. Then, lift the operating handle 21 of the central reverse hooking mechanism 2, pushing the frame 26 to rotate along the rotating shaft 27. This causes the clamping block 25 to move forward along the linkage mechanism 22, compressing the spring 24 and bringing the X-direction clamping block 25 into contact with the outer tailgate panel until the spring 24 is compressed to its limit, thus achieving X-direction locking of the tailgate. At this point, tighten the tailgate hinge mounting bolts to complete the tailgate assembly. Because this tailgate top cover gap limiting fixture is designed according to a digital model, it perfectly fits the tailgate frame and top cover surface, ensuring that the inner gap between the tailgate and the top cover meets design requirements. The X-direction inner gap of the tailgate meets design requirements, eliminating the need for secondary adjustments, thus greatly saving manpower and improving assembly efficiency.

[0030] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A tooling for limiting the gap between the tailgate and the top cover, characterized in that, It includes a symmetrically designed left gap limiting mechanism (1) and a right gap limiting mechanism (3), and a central X-direction reverse hooking mechanism (2) is provided between the left gap limiting mechanism (1) and the right gap limiting mechanism (3). The left gap limiting mechanism (1) and the right gap limiting mechanism (3) are both placed on the vehicle body and attached to the top cover (6). They have a tailgate gap windmill plug, which is set between the top cover (6) flange and the tailgate (4) to control the X-direction gap of the tailgate (4). The central X-direction reverse hooking mechanism (2) is used to fix it to the vehicle body and has an operable clamping block (25) for fitting with the outer panel of the tailgate (4) to achieve X-direction locking of the tailgate (4).

2. The tailgate and top cover gap limiting fixture according to claim 1, characterized in that, The left gap limiting mechanism (1) includes a first adapter block (12), a first strong magnet (16) is fixed on the lower surface of the first adapter block (12), the first strong magnet (16) is used to be attracted to the top cover (6), a first top cover molding block (13) is fixed on the side of the first adapter block (12), the first top cover molding block (13) is used to be fitted with the flange of the top cover (6); a first handle (11) is fixed on the upper surface of the first adapter block (12).

3. The tailgate and top cover gap limiting fixture according to claim 2, characterized in that, A first adjusting shim is placed between the first adapter block (12) and the first top cover molding block (13), and the first adjusting shim is used to adjust the Y-axis dimension of the first top cover molding block (13).

4. The tailgate and top cover gap limiting fixture according to claim 2, characterized in that, The tailgate gap windmill plug includes a first tailgate gap windmill plug A (14) and a first tailgate gap windmill plug B (15). The first tailgate gap windmill plug A (14) and the first tailgate gap windmill plug B (15) are both fixed on the side of the first adapter block (12), and the first tailgate gap windmill plug A (14) and the first tailgate gap windmill plug B (15) correspond to the upper tolerance limit and the lower tolerance limit, respectively.

5. The tailgate and top cover gap limiting fixture according to claim 4, characterized in that, The first tailgate gap windmill plug A (14) and the first tailgate gap windmill plug B (15) are both composed of multiple windmill-shaped plugs, which are used to adjust and control the thickness of the gap by rotating.

6. The tailgate and top cover gap limiting fixture according to claim 1, characterized in that, The central X-direction reverse hooking mechanism (2) includes a transition block (23) and a connecting block (28). Both ends of the transition block (23) are fixed with pressing blocks (25). A linkage mechanism (22) slides on the transition block (23). An operating handle (21) is fixed on the linkage mechanism (22). Both ends of the connecting block (28) are fixed with limit blocks (29). One side of the connecting block (28) is rotatably connected to a frame (26) via a rotating shaft (27). One end of the linkage mechanism (22) passes through the frame (26). A spring (24) is sleeved on the linkage mechanism (22). The spring (24) is located between the transition block (23) and the frame (26). The limit block (29) is C-shaped and is used to snap onto the waist-shaped hole (5) of the rear crossbeam of the top cover.

7. The tailgate and top cover gap limiting fixture according to claim 1, characterized in that, The right-side gap limiting mechanism (3) includes a second adapter block (32), a second strong magnet (36) is fixed on the lower surface of the second adapter block (32), the second strong magnet (36) is used to be attracted to the top cover (6), a second top cover molding block (33) is fixed on the side of the second adapter block (32), the second top cover molding block (33) is used to be fitted with the flange of the top cover (6); a second handle (31) is fixed on the upper surface of the second adapter block (32).

8. The tailgate and top cover gap limiting fixture according to claim 7, characterized in that, A second adjusting shim is placed between the second adapter block (32) and the second top cover molding block (33), and the second adjusting shim is used to adjust the Y-axis dimension of the second top cover molding block (33).

9. The tailgate and top cover gap limiting fixture according to claim 7, characterized in that, The tailgate gap windmill plug also includes a second tailgate gap windmill plug A (34) and a second tailgate gap windmill plug B (35). The second tailgate gap windmill plug A (34) and the second tailgate gap windmill plug B (35) are both fixed on the side of the second adapter block (32), and the second tailgate gap windmill plug A (34) and the second tailgate gap windmill plug B (35) correspond to the upper tolerance limit and the lower tolerance limit, respectively.

10. A tailgate and top cover gap limiting fixture according to claim 9, characterized in that, The second tailgate gap windmill plug A (34) and the second tailgate gap windmill plug B (35) are both composed of multiple windmill-shaped plugs, which are used to adjust and control the thickness of the gap by rotating.

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