阅读说明：本技术 一种汽车后背门装配对齐度检验辅具 (Utensil is assisted in assembly alignment degree inspection of car back door ) 是由 储伟 胡军 李铁 丁文娟 于 2021-07-28 设计创作，主要内容包括：本发明提供一种汽车后背门装配对齐度检验辅具,该检验辅具包括辅具本体、定位机构以及检验基准机构；辅具本体包括操作把手和连接板；操作把手固定设置于连接板的一侧面的中部；检验基准机构设置于连接板的顶部,检验基准机构用于检验后背门在汽车骨架上的装配时位置；定位机构设置于连接板上,并向连接板的另一侧面延伸；定位机构能够将检验辅具定位在汽车骨架上,并限制检验辅具在汽车骨架上移动；本发明提供的汽车后背门装配对齐度检验辅具,可适用于汽车后背门与侧围后端Z向存在关联度车型,可在焊装调整线有效检验后背门Z向位置,从而保证整车后背门、侧围、固定尾灯、固定尾灯以及后保的装配效果,提升整车后端系统装配质量。(The invention provides an auxiliary tool for testing the assembly alignment degree of a back door of an automobile, which comprises an auxiliary tool body, a positioning mechanism and a testing benchmark mechanism, wherein the auxiliary tool body is provided with a positioning mechanism; the auxiliary tool body comprises an operating handle and a connecting plate; the operating handle is fixedly arranged in the middle of one side surface of the connecting plate; the inspection benchmark mechanism is arranged at the top of the connecting plate and used for inspecting the assembly position of the back door on the automobile framework; the positioning mechanism is arranged on the connecting plate and extends to the other side surface of the connecting plate; the positioning mechanism can position the inspection auxiliary tool on the automobile framework and limit the inspection auxiliary tool to move on the automobile framework; the auxiliary tool for testing the assembly alignment degree of the back door of the automobile, provided by the invention, is suitable for automobile types with the association degree of the back door of the automobile and the Z direction of the back end of the side wall, and can effectively test the Z direction position of the back door on a welding adjusting line, so that the assembly effect of the back door, the side wall, the fixed tail lamp and the rear protector of the whole automobile is ensured, and the assembly quality of a system at the back end of the whole automobile is improved.)

1. An auxiliary tool for testing the assembly alignment degree of a back door of an automobile is characterized by comprising an auxiliary tool body, a positioning mechanism and a testing benchmark mechanism; the auxiliary tool body comprises an operating handle (1) and a connecting plate (2); the operating handle (1) is fixedly arranged in the middle of one side face of the connecting plate (2); the inspection benchmark mechanism is arranged at the top of the connecting plate (2) and is used for inspecting the assembly position of the back door (16) on the automobile framework (17); the positioning mechanism is arranged on the connecting plate (2) and extends to the other side surface of the connecting plate (2); the positioning mechanism can position the inspection aid on the automobile framework (17) and limit the inspection aid to move on the automobile framework (17).

2. The vehicle back door assembly alignment inspection aid according to claim 1, wherein the inspection reference mechanism includes an inspection reference block (4), the inspection reference block (4) being fixedly provided on a top portion of the first connection block (6); one end of the first connecting block (6) is fixedly connected to the side surface of the connecting plate (2); the top of the first connecting block (6) extends to the top of the connecting plate (2) and is bent to form a connecting surface; the first connecting block (6) is fixedly connected to the connecting surface.

3. The automobile back door assembly alignment degree inspection auxiliary tool according to claim 2, wherein the inspection reference block (4) can measure the position of Z-direction alignment degree of a movable tail lamp socket of the back door (16) and a fixed tail lamp sharp corner of a side wall of the automobile frame (17), so that an assembly worker can judge whether the position of the back door (16) during the assembly of the automobile frame (17) is in a design definition required position or not according to the position of the inspection reference block (4).

4. The automobile back door assembly alignment degree inspection aid according to claim 3, wherein an assembly worker fastens bolts of the back door (16) after adjusting and confirming that the Z direction of the back door (16) is within a design definition range, then opens the back door (16), and takes out the inspection aid from the automobile frame (17) along the axial direction of the main positioning pin (7) and the auxiliary positioning pin (5) through the operating handle (1).

5. The automobile back door assembly alignment verification auxiliary according to claim 1, wherein the positioning mechanism includes a main positioning pin (7) and an auxiliary positioning pin (5); the main positioning pin (7) is arranged on the second pin seat (8); the second pin seat (8) is connected to the side face of the connecting plate (2) through a second connecting block (11) and is positioned at the top of one side face of the connecting plate (2); an included angle is formed between the main positioning pin (7) and the side face of the connecting plate (2); the auxiliary positioning pin (5) is arranged on the first pin seat (3); one end of the first pin seat (3) is fixedly connected to the side face of the connecting plate (2) and is positioned at the top of the other side of the side face of the connecting plate (2); the other end of the first pin seat (3) extends outwards towards the side face of the connecting plate (2) and forms a connecting part, and the auxiliary positioning pin (5) is arranged on one side of the connecting part; and an included angle is formed between the auxiliary positioning pin (5) and the side surface of the connecting plate (2).

6. The automobile back door assembly alignment degree inspection auxiliary tool as claimed in claim 5, wherein the positioning mechanism further comprises an outer positioning block (15), the outer positioning block (15) is of an L-shaped structure; the outer positioning block (15) is arranged at the bottom of the connecting plate (2) and is positioned at one side where the first pin boss (3) is connected; the positioning surface of the outer positioning block (15) deviates from the mounting surfaces of the main positioning pin (7) and the auxiliary positioning pin (5).

7. The vehicle back door assembly alignment verification auxiliary according to claim 6, wherein the positioning mechanism further comprises an inner positioning block (9), the inner positioning block (9) being disposed on the gauge block (10); the regulating block (10) is fixedly connected to the connecting plate (2) and is positioned on one side of the main positioning pin (7); the positioning surface of the inner positioning block (9) is opposite to the positioning surface of the outer positioning block (15).

8. The vehicle back door assembly alignment verification auxiliary according to claim 7, wherein the positioning mechanism further includes a side stopper (13), the side stopper (13) being provided on the fourth connecting block (14); one end of the fourth connecting block (14) is fixedly connected to the bottom of the connecting plate (2); one end of the side limiting block (13) is fixedly connected to the other end of the fourth connecting block (14) through a bolt and is positioned at the lower end of the inner positioning block (9); the other end of the side limiting block (13) extends to one side deviating from the inner positioning block (9) and forms a limiting surface.

9. The vehicle back door assembly alignment test auxiliary tool of claim 7, wherein the vehicle frame (17) is provided with a main and auxiliary tail lamp fixing positioning hole, and the main positioning pin (7) and the auxiliary positioning pin (5) are respectively inserted into the main and auxiliary tail lamp fixing positioning holes corresponding to the vehicle frame (17); the outer positioning block (15) is attached to a support protection positioning surface of the automobile framework (17), and the inner positioning block (9) is attached to a sealing surface of the back door (16).

10. The vehicle back door assembly alignment inspection aid of claim 7, wherein MC nylon materials are respectively arranged on the positioning surfaces of the inner positioning block (9) and the outer positioning block (15); and an MC nylon material is arranged on the limiting surface of the side limiting block (13).

Technical Field

The invention belongs to the technical field of auxiliary tools for testing the assembly alignment degree of an automobile back door, and particularly relates to an auxiliary tool for testing the assembly alignment degree of the automobile back door.

Background

With increasingly strengthened global automobile market competition, the individual requirements of automobile consumers on automobiles are continuously increased, the automobile is more and more attractive in appearance and stricter in quality requirements, and meanwhile, the requirement on the assembly consistency of the automobile body is higher and higher; therefore, how to complete the assembly in the shortest time under the premise of ensuring the assembly consistency becomes a problem to be mainly solved by each host factory. At present, the mounting mode of the automobile back door of the domestic automobile manufacturer comprises manual adjustment and auxiliary tool positioning, and the two mounting modes respectively have the following defects:

1. manual adjustment: after the automobile back door is assembled, an assembling worker adjusts the gap surface difference between the back door and the side wall; the method has high requirements on the skill of an assembly worker, and uncertain factors are increased, so that the final back door assembly quality is unstable;

2. auxiliary tool positioning: designing profiling blocks at the left spoiler and the right spoiler of the back door of the automobile to be positioned on the back door, and limiting the integral posture of the back door and the framework through the reference block so as to finish the assembly of the back door; the assembly mode can only ensure the overall assembly quality of the upper area, and is difficult to effectively control the upper and lower positions of the back door in welding, so that the assembly quality of the back door and the peripheral area is poor.

Based on the technical problems existing in the installation process of the automobile back door, no relevant solution is provided; there is therefore a pressing need to find effective solutions to the above problems.

Disclosure of Invention

The invention aims to provide an auxiliary tool for testing the assembly alignment degree of a back door of an automobile aiming at overcoming the defects in the prior art and aims to solve the problem of poor assembly quality of the back door of the existing automobile.

The invention provides an auxiliary tool for testing the assembly alignment degree of a back door of an automobile, which comprises an auxiliary tool body, a positioning mechanism and a testing benchmark mechanism, wherein the auxiliary tool body is provided with a positioning mechanism; the auxiliary tool body comprises an operating handle and a connecting plate; the operating handle is fixedly arranged in the middle of one side surface of the connecting plate; the inspection benchmark mechanism is arranged at the top of the connecting plate and used for inspecting the assembly position of the back door on the automobile framework; the positioning mechanism is arranged on the connecting plate and extends to the other side surface of the connecting plate; the positioning mechanism can position the inspection auxiliary tool on the automobile framework and limit the inspection auxiliary tool to move on the automobile framework.

Furthermore, the check reference mechanism comprises a check reference block which is fixedly arranged at the top of the first connecting block; one end of the first connecting block is fixedly connected to the side surface of the connecting plate; the top of the first connecting block extends to the top of the connecting plate and is bent to form a connecting surface; the first connecting block is fixedly connected to the connecting surface.

Furthermore, the position of Z-direction alignment degree of a rear back door movable tail lamp light opening and a tail lamp sharp corner fixed on the side wall of the automobile framework can be measured by the inspection reference block, so that an assembly worker can judge whether the position of the rear back door is in a design definition required position or not during the assembly of the automobile framework according to the position of the inspection reference block.

Further, after the assembly staff confirms that the Z direction of the back door is in the design definition interval after adjustment, the bolts of the back door are fastened, then the back door is opened, and the inspection auxiliary tool is taken out of the automobile framework along the axial direction of the main positioning pin and the auxiliary positioning pin through the operation handle.

Further, the positioning mechanism comprises a main positioning pin and an auxiliary positioning pin; the main positioning pin is arranged on the second pin seat; the second pin seat is connected to the side face of the connecting plate through a second connecting block and is positioned at the top of one side of the side face of the connecting plate; an included angle is formed between the main positioning pin and the side surface of the connecting plate; the auxiliary positioning pin is arranged on the first pin seat; one end of the first pin seat is fixedly connected to the side face of the connecting plate and is positioned at the top of the other side of the side face of the connecting plate; the other end of the first pin seat extends outwards from the side face of the connecting plate and forms a connecting part, and the auxiliary positioning pin is arranged on one side of the connecting part; an included angle is formed between the auxiliary positioning pin and the side face of the connecting plate.

Furthermore, the positioning mechanism also comprises an outer positioning block which is of an L-shaped structure; the outer positioning block is arranged at the bottom of the connecting plate and is positioned at one side where the first pin boss is connected; the positioning surface of the outer positioning block deviates from the mounting surfaces of the main positioning pin and the auxiliary positioning pin.

Furthermore, the positioning mechanism also comprises an inner positioning block which is arranged on the regulating block; the regulating block is fixedly connected to the connecting plate and is positioned on one side of the main positioning pin; the positioning surface of the inner positioning block is opposite to the positioning surface of the outer positioning block.

Furthermore, the positioning mechanism also comprises a side limiting block, and the side limiting block is arranged on the fourth connecting block; one end of the fourth connecting block is fixedly connected to the bottom of the connecting plate; one end of the side limiting block is fixedly connected to the other end of the fourth connecting block through a bolt and is positioned at the lower end of the inner positioning block; the other end of the side limiting block extends towards one side departing from the inner positioning block and forms a limiting surface.

Furthermore, a main positioning hole and an auxiliary positioning hole for fixing the tail lamp are arranged on the automobile framework, and the main positioning pin and the auxiliary positioning pin are respectively inserted into the main positioning hole and the auxiliary positioning hole of the fixing tail lamp corresponding to the automobile framework; the outer positioning block is attached to the positioning surface of the protective bracket of the automobile framework, and the inner positioning block is attached to the sealing surface of the back door.

Furthermore, MC nylon materials are respectively arranged on the positioning surfaces of the inner positioning block and the outer positioning block; the limiting surface of the side limiting block is provided with MC nylon material.

The auxiliary tool for testing the assembly alignment degree of the back door of the automobile, provided by the invention, is suitable for automobile types with the association degree of the back door of the automobile and the Z direction of the back end of the side wall, and can effectively test the Z direction position of the back door on a welding adjusting line, so that the assembly effect of the back door, the side wall, the fixed tail lamp and the rear protector of the whole automobile is ensured, and the assembly quality of a system at the back end of the whole automobile is improved.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The invention will be further explained with reference to the drawings, in which:

FIG. 1 is a schematic view of an assembly alignment inspection aid for a back door of an automobile according to the present invention;

FIG. 2 is an exploded view of an automotive back door assembly alignment inspection aid of the present invention;

fig. 3 is a schematic view of the use state of the automobile back door assembly alignment degree inspection auxiliary of the present invention.

In the figure: 1. an operating handle; 2. a connecting plate; 3. a first pin boss; 4. checking a reference block; 5. an auxiliary positioning pin; 6. a first connection block; 7. a main positioning pin; 8. a second pin boss; 9. an inner positioning block; 10. a block is regulated; 11. a second connecting block; 12. a third connecting block; 13. a side limiting block; 14. a fourth connecting block; 15. an outer positioning block; 16. a back door; 17. an automobile frame.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1 to 3, the present invention provides an auxiliary tool for checking an assembly alignment degree of a back door of an automobile, the auxiliary tool comprising an auxiliary tool body, a positioning mechanism and a checking reference mechanism; the auxiliary tool body comprises an operating handle 1 and a connecting plate 2, and is used for connecting a positioning mechanism of the inspection auxiliary tool with an inspection reference mechanism into a whole, so that the convenience in use in the assembly process of the back door is realized, the positioning mechanism is designed according to the model and the structure of a specific vehicle type, materials, structures and the like are optimized as far as possible besides the operation convenience and the positioning precision are ensured, the labor intensity of workers in the use process is reduced, and the requirements on human engineering are met; specifically, the operating handle 1 is fixedly arranged in the middle of one side surface of the connecting plate 2; the inspection benchmark mechanism is arranged at the top of the connecting plate 2 and is used for inspecting the assembly position of the back door 16 on the automobile framework 17; the positioning mechanism is arranged on the connecting plate 2 and extends to the other side surface of the connecting plate 2; the positioning mechanism can position the inspection aid on the automobile framework 17 and limit the inspection aid to move on the automobile framework 17; the auxiliary tool for the assembly alignment degree of the automobile back door provided by the invention can solve the problems of poor assembly consistency and poor position precision of the alignment degree of the back door and the side wall caused by the lack of the auxiliary tool for the assembly inspection at the Z-position of the back door in the existing assembly process of the automobile back door, and the assembly quality of the automobile back door is improved.

Preferably, in combination with the above solution, as shown in fig. 1 to 3, the checking reference mechanism includes a checking reference block 4, and the checking reference block 4 is fixedly arranged on the top of the first connecting block 6; specifically, one end of the first connecting block 6 is fixedly connected to the side surface of the connecting plate 2; the top of the first connecting block 6 extends to the top of the connecting plate 2 and is bent to form a connecting surface; the first connecting block 6 is fixedly connected to the connecting surface; further, the position of the alignment degree of the Z direction (the vertical direction can be referred to) of the rear back door 16 movable tail lamp socket and the automobile framework 17 side fixed tail lamp sharp corner can be measured by the inspection reference block 4, so that an assembling worker can judge whether the position of the rear back door 16 is in a design definition required position when the automobile framework 17 is assembled according to the position of the inspection reference block 4; further, after the assembly staff adjust and confirm that the Z direction of the back door 16 is in the design definition interval, the bolts of the back door 16 are fastened, then the back door 16 is opened, the inspection auxiliary tool is taken out of the automobile framework 17 along the axial direction of the main positioning pin 7 and the auxiliary positioning pin 5 through the operating handle 1, and therefore the assembly of the back door 16 is completed, and the next assembly is carried out; specifically, the structures of the inspection reference block, the connecting block and the like are mainly designed by simulating a model to perform a profiling structure on a theoretical gap, the inspection reference block 4 is fixed on the connecting plate 2 of the inspection auxiliary tool through the connecting block, and the position of the inspection block can be adjusted by increasing or reducing gaskets; according to the scheme provided by the invention, the positioning mechanism of the auxiliary inspection tool can be adjusted according to the actual requirement of the welding adjustment line, so that the simulated alignment degree inspection block is positioned at the theoretical design position, a theoretical assembly standard is issued for an assembly worker to adjust and assemble according to a real object, and the stability of the alignment degree with the side wall in the assembly process of the back door and the improvement of the assembly quality of the back door area of the whole vehicle are improved.

Preferably, in combination with the above scheme, as shown in fig. 1 to 3, in the present embodiment, the positioning mechanism includes a main positioning pin 7 and an auxiliary positioning pin 5; the main positioning pin 7 is arranged on the second pin seat 8; the second pin seat 8 is connected to the side surface of the connecting plate 2 through a second connecting block 11 and is positioned at the top of one side of the connecting plate 2; specifically, the second connecting block 11 is fixedly connected to the third connecting block 12, and the third connecting block 12 is fixed on the connecting plate 2 through a bolt; furthermore, an included angle is formed between the main positioning pin 7 and the side surface of the connecting plate 2, so that corresponding positioning can be realized; further, the auxiliary positioning pin 5 is arranged on the first pin seat 3; one end of the first pin seat 3 is fixedly connected to the side surface of the connecting plate 2 and is positioned at the top of the other side of the side surface of the connecting plate 2; the other end of the first pin seat 3 extends outwards towards the side surface of the connecting plate 2 and forms a connecting part, and an auxiliary positioning pin 5 is arranged on one side of the connecting part; an included angle is formed between the auxiliary positioning pin 5 and the side surface of the connecting plate 2; further, the positioning angles between the auxiliary positioning pin 5 and the main positioning pin 7 and the connecting plate 2 are consistent with each other; in the scheme, the main positioning pin 7 and the auxiliary positioning pin 5 are designed, so that the auxiliary tool can be effectively positioned and inspected, and the positioning accuracy and the stability of the auxiliary tool on the vehicle body are realized.

Preferably, in combination with the above scheme, as shown in fig. 1 to 3, in this embodiment, the positioning mechanism further includes an outer positioning block 15, and the outer positioning block 15 is an L-shaped structure; the outer positioning block 15 is arranged at the bottom of the connecting plate 2 and is positioned at one side where the first pin boss 3 is connected; the positioning surface of the outer positioning block 15 deviates from the mounting surfaces of the main positioning pin 7 and the auxiliary positioning pin 5; in the above scheme, the outer positioning block 15 can realize the positioning accuracy and stability of the auxiliary tool on the vehicle body.

Preferably, in combination with the above scheme, as shown in fig. 1 to 3, in this embodiment, the positioning mechanism further includes an inner positioning block 9, and the inner positioning block 9 is disposed on the regulating block 10; the regulating block 10 is fixedly connected to the connecting plate 2 and is positioned on one side of the main positioning pin 7; the positioning surface of the inner positioning block 9 is opposite to the positioning surface of the outer positioning block 15; in the above scheme, the positioning accuracy and stability of the auxiliary tool on the vehicle body can be realized by the inner positioning block 9.

Preferably, with reference to the above scheme, as shown in fig. 1 to 3, in this embodiment, the positioning mechanism further includes a side limiting block 13, and the side limiting block 13 is disposed on the fourth connecting block 14; one end of the fourth connecting block 14 is fixedly connected to the bottom of the connecting plate 2; one end of the side limiting block 13 is fixedly connected to the other end of the fourth connecting block 14 through a bolt and is positioned at the lower end of the inner positioning block 9; the other end of the side limiting block 13 extends to the side departing from the inner positioning block 9 and forms a limiting surface.

Preferably, in combination with the above scheme, as shown in fig. 1 to 3, the automobile frame 17 is provided with main and auxiliary positioning holes for fixing the tail lamp, wherein the main positioning pin 7 and the auxiliary positioning pin 5 are respectively inserted into the main and auxiliary positioning holes for fixing the tail lamp corresponding to the automobile frame 17; the outer positioning block 15 is attached to the support protection positioning surface of the automobile framework 17, and the inner positioning block 9 is attached to the sealing surface of the back door 16, so that integral positioning is achieved, and positioning stability is improved.

Preferably, in combination with the above solutions, as shown in fig. 1 to 3, the positioning surfaces of the inner positioning block 9 and the outer positioning block 15 are respectively provided with MC nylon materials; the MC nylon material is arranged on the limiting surface of the side limiting block 13, so that the defects of collision and the like of the body-in-white caused by the auxiliary tool can not exist in the assembling process.

As shown in fig. 1 to 3, in the auxiliary tool for testing alignment degree of automobile back door assembly provided by the present invention, before assembling the back door, an assembling worker holds the auxiliary tool operating handle 1 for testing alignment degree to place a positioning mechanism on an automobile frame 17, wherein a main positioning pin 7 and an auxiliary positioning pin 5 are respectively placed in main and auxiliary positioning holes of a fixed tail lamp corresponding to the automobile frame 17, an outer positioning block 15 and an inner positioning block 9 are respectively attached to a positioning surface of an automobile frame support and a sealing surface of the back door, and under the action of the positioning structure, the auxiliary tool for testing is accurately and stably positioned on the automobile frame 17; when the automobile back door is assembled, an assembling worker positions the back door on an automobile body through the assembling auxiliary tool, before fastening bolts of the back door are tightened, the Z-direction alignment degree of a movable tail lamp light opening of the back door 16 and a sharp corner of a fixed tail lamp of the side wall of the automobile framework 17 can be measured through the inspection reference block 4, the relative positions of the back door and the fixed tail lamp can be measured through the inspection reference block 4, the assembling worker can judge whether the position of the back door is in a design definition required position when the automobile framework 17 is assembled according to the position of the back door and the inspection reference block 4, after the assembling worker confirms that the Z direction of the back door is in a design definition interval through adjustment, the back door bolts are fastened, the back door positioning pins 16 are opened again, the inspecting auxiliary tool is taken out of the automobile framework 17 along the axial direction of the main positioning pin 7 and the auxiliary positioning pin 5 through the operating handle 1, and then the assembling work of the next automobile is carried out.

The auxiliary tool for testing the assembly alignment degree of the back door of the automobile, provided by the invention, is suitable for automobile types with the association degree of the back door of the automobile and the Z direction of the back end of the side wall, and can effectively test the Z direction position of the back door on a welding adjusting line, so that the assembly effect of the back door, the side wall, the fixed tail lamp and the rear protector of the whole automobile is ensured, and the assembly quality of a system at the back end of the whole automobile is improved.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art can make numerous possible variations and modifications to the described embodiments, or modify equivalent embodiments, without departing from the scope of the invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technology of the present invention are within the protection scope of the present invention, unless the content of the technical solution of the present invention is departed from.