Vehicle body assembly system

Abstract

The utility model relates to a vehicle body overall assembly system which comprises an overall assembly station, a first platform, a second platform and a positioning assembly, the overall assembly station is used for containing a vehicle body overall assembly structure, the first platform and the second platform are oppositely arranged on the two sides of the overall assembly station and divide a space into a first space and a second space in the third direction, and the overall assembly station is located in the first space; the positioning assembly comprises side grippers installed in the first space and rear grippers installed in the second space, the side grippers and the rear grippers are both used for fixing the vehicle body overall assembly structure, the side grippers and the rear grippers are arranged in the first space and the second space correspondingly, and therefore the arrangement density of the side grippers and the rear grippers is reduced, and the overall assembly efficiency is improved. The operation space of the side grippers and the rear grippers is increased, the installation and replacement difficulty of the side grippers and the rear grippers is reduced, the size occupied by the side grippers and the rear grippers during installation can be reduced, and the overall size of the vehicle body assembly system is reduced.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a vehicle body assembly system. Background Art

[0002] The body assembly structure includes the vehicle's lower mounting plate, left side panel, right side panel, tail end panel, roof front crossbeam and roof rear crossbeam. The body assembly system is used to precisely position the body assembly structure and to weld and fix the various parts to form an integral structure.

[0003] The vehicle body assembly system includes side grippers and rear grippers for positioning. In the prior art, multiple side grippers and rear grippers are installed in the same space, for example, on the ground. This results in a dense arrangement of the side grippers and rear grippers, which is not conducive to the movement and replacement of the grippers and also increases the overall size of the system. Utility Model Content

[0004] The present application provides a vehicle body assembly system that can reduce the arrangement density of side grips and rear grips while reducing the overall size of the vehicle body assembly system.

[0005] The present application provides a vehicle body assembly system, comprising: an assembly station for placing a vehicle body assembly structure; a first platform and a second platform, wherein the first platform and the second platform are relatively arranged on both sides of the assembly station along a first direction, and the first platform and the second platform are arranged at a higher height than the assembly station along a third direction, and the first platform and the second platform divide the space into a first space and a second space in the third direction, and the assembly station is located in the first space; a positioning component, wherein the positioning component comprises a side gripper and a rear gripper, the side gripper being installed in the first space, and the side gripper being used to fix a lower mounting plate and a side panel of the vehicle body assembly structure, and the rear gripper being installed on the second platform and being located in the second space, and the rear gripper being used to fix a rear cross beam of a top cover of the vehicle body assembly structure.

[0006] In the present application, the lower mounting plate and the side panel are set in the first space, which can facilitate the fixation of the side grippers to the lower half of the vehicle body assembly structure, so as to simplify the side gripper structure and facilitate the simplification of the operation of the side grippers fixing the lower mounting plate and the side panel; the rear grippers for fixing the rear cross beam of the top cover are installed on the second platform and located in the second space, which can facilitate the fixation of the rear grippers to the upper half of the vehicle body assembly structure, so as to simplify the structure of the rear grippers and facilitate the simplification of the operation of the rear grippers fixing the rear cross beam of the top cover; the side grippers and the rear grippers are respectively set in the first space and the second space, so that the side grippers and the rear grippers are arranged up and down, thereby reducing the arrangement of the side grippers and the rear grippers. The dense layout increases the operating space of the side grippers and the rear grippers, facilitates the movement of the side grippers and the rear grippers, reduces the risk of interference during the replacement, positioning or release of the side grippers and the rear grippers, thereby helping to extend the service life of the side grippers and the rear grippers, and also facilitates improving the movement stability of the side grippers and the rear grippers, and reduces the difficulty of installing and replacing the side grippers and the rear grippers, shortening the installation and replacement cycle. In addition, the side grippers and the rear grippers are respectively arranged in the first space and the second space, in the plane enclosed by the first direction and the second direction, which can reduce the size occupied by the side grippers and the rear grippers when installed, thereby helping to reduce the overall size of the vehicle body assembly system.

[0007] In one possible design, the positioning assembly further includes a moving member connected to the side gripper, and the moving member is used to drive the side gripper to move toward or away from the overall assembly station along the first direction and / or the second direction.

[0008] In one possible design, a first placement rack is placed in the first space, and a plurality of side grippers are placed on the first placement rack; the vehicle body assembly system also includes a first robot, which is installed in the first space and is used to install the side grippers on the first placement rack onto the moving parts.

[0009] In a possible design, at least a first type of side gripper and a second type of side gripper are placed on the first placement rack.

[0010] In a possible design, the first space is further provided with a first trolley, on which a third type of side gripper is placed.

[0011] In a possible design, a second placement rack is placed in the first space, a welding clamp is placed on the second placement rack, and the first robot is also used to grab the welding clamp to weld and fix the side panels; along the second direction, the first robot is relatively arranged on both sides of the general assembly station.

[0012] In one possible design, the vehicle body assembly system also includes a third rack, which is installed on the second platform and located in the second space, and a plurality of rear grippers are placed on the third rack; the vehicle body assembly system also includes a second robot, which is installed on the second platform and located in the second space, and the second robot is used to grab the rear grippers on the third rack so that the rear grippers fix the rear crossbeam of the top cover; at least the first model of rear grippers and the second model of rear grippers are placed on the third rack.

[0013] In a possible design, the vehicle body assembly system further includes a second trolley, which is installed on the second platform and located in the second space, and a third model of rear gripper is placed on the second trolley.

[0014] In one possible design, the vehicle body assembly system also includes a third robot and a fourth robot. The third robot is installed on the first platform and located in the second space. The third robot is used to weld and fix the front crossbeam of the roof of the vehicle body assembly structure. The fourth robot is installed on the second platform and located in the second space. The fourth robot is used to weld and fix the rear crossbeam of the roof. The number of third robots is at least two, and the third robots are distributed along the second direction; and / or the number of fourth robots is at least two, and the fourth robots are distributed along the second direction.

[0015] In one possible design, in the third direction, the setting height of the first platform is equal to or higher than the vehicle body assembly structure on the assembly station, and the minimum vertical distance H1 between the first platform and the vehicle body assembly structure in the third direction satisfies: 0

[0016] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a vehicle body assembly system provided in this application in one embodiment;

[0018] Figure 2 for Figure 1 A top view of

[0019] Figure 3 for Figure 1 A front view of a portion of the structure;

[0020] Figure 4 for Figure 3 Schematic diagram of the layout of the first platform, second platform, general assembly station and body general assembly structure. ​

[0021] Reference numerals:

[0022] 1-General assembly station;

[0023] 2-First platform;

[0024] 3- Second platform;

[0025] 4-First space;

[0026] 41-first placement rack;

[0027] 42-First Robot;

[0028] 43-first car;

[0029] 44-second placement rack;

[0030] 45-Fifth robot;

[0031] 5- Second space;

[0032] - The third shelf;

[0033] 51- Second robot;

[0034] 52-second car;

[0035] 53-Third robot;

[0036] 54-the fourth robot;

[0037] 6- support column;

[0038] 7- Overall assembly structure of the vehicle body.

[0039] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0040] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0041] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0042] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0043] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0044] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also be indirectly connected to the other element "on" or "under" through an intermediate element.

[0045] The embodiment of the present application provides a vehicle body assembly system for positioning the vehicle body assembly structure 7 and for welding and fixing the lower mounting plate, the left and right side panels, the front end panel, the rear end panel, the front cross beam of the roof, and the rear cross beam of the roof. Specifically, Figure 1 As shown, the length direction of the vehicle body assembly structure 7 is recorded as the first direction X, that is, the first direction X is the front-rear direction of the vehicle, the width direction of the vehicle body assembly structure 7 is recorded as the second direction Y, that is, the second direction Y is the left-right direction of the vehicle, and the height direction of the vehicle body assembly structure 7 is recorded as the third direction Z, that is, the third direction Z is the height direction of the vehicle.

[0046] like Figure 1 As shown, the vehicle body assembly system includes an assembly station 1, a first platform 2, a second platform 3 and a positioning component. The assembly station 1 is used to place the vehicle body assembly structure 7. Along the first direction X, the first platform 2 and the second platform 3 are relatively arranged on both sides of the assembly station 1. Figure 3 and Figure 4As shown, along the third direction Z, the setting height of the first platform 2 and the second platform 3 is higher than the general assembly station 1, and the first platform 2 and the second platform 3 divide the space into a first space 4 and a second space 5 in the third direction Z, and the general assembly station 1 is located in the first space 4; the positioning component includes a side gripper and a rear gripper, the side gripper is installed in the first space 4, the side gripper is used to fix the lower mounting plate and the side panel of the vehicle body general assembly structure 7, the rear gripper is installed on the second platform 3 and is located in the second space 5, and the rear gripper is used to fix the rear cross beam of the top cover of the vehicle body general assembly structure 7.

[0047] In the embodiment of the present application, the part for fixing the lower mounting plate and the side panel is arranged in the first space 4, which can facilitate the fixation of the side grippers to the lower half of the vehicle body assembly structure 7, so as to simplify the side gripper structure and facilitate the simplification of the operation of the side grippers fixing the lower mounting plate and the side panel; the rear gripper for fixing the rear cross beam of the top cover is installed on the second platform 3 and located in the second space 5, which can facilitate the fixation of the rear gripper to the upper half of the vehicle body assembly structure 7, so as to simplify the structure of the rear gripper and facilitate the simplification of the operation of the rear gripper fixing the rear cross beam of the top cover; the side grippers and the rear grippers are respectively arranged in the first space 4 and the second space 5, so that the side grippers and the rear grippers are arranged up and down, thereby reducing the side grippers and the rear grippers. The hands are densely arranged, which increases the operating space of the side grippers and the rear grippers, facilitates the movement of the side grippers and the rear grippers, and reduces the risk of interference between the side grippers and the rear grippers during replacement, positioning or release of the positioning, thereby helping to extend the service life of the side grippers and the rear grippers, and also facilitates improving the movement stability of the side grippers and the rear grippers, and reduces the difficulty of installation and replacement of the side grippers and the rear grippers, shortening the installation and replacement cycle. In addition, the side grippers and the rear grippers are respectively arranged in the first space 4 and the second space 5, in the plane enclosed by the first direction X and the second direction Y, which can reduce the size occupied by the side grippers and the rear grippers when installed, thereby helping to reduce the overall size of the vehicle body assembly system.

[0048] The positioning assembly further includes a moving part, which is connected to the side gripper. The moving part is used to drive the side gripper to move toward or away from the general assembly station 1 along the first direction X and / or the second direction Y.

[0049] In this embodiment, during the movement of the vehicle body assembly structure 7 to the assembly station 1, and during the movement of the vehicle body assembly structure 7 from the assembly station 1 to the next station, the moving member can drive the side grippers away, thereby increasing the movement space of the vehicle body assembly structure 7 and reducing the risk of damage to the vehicle body assembly structure 7 and the side grippers due to interference with the side grippers during the movement of the vehicle body assembly structure 7, thereby improving the yield of the vehicle body assembly structure 7 and also facilitating the service life of the side grippers. Controlling the movement of the side grippers by the moving member can facilitate the movement of the side grippers, thereby simplifying the structure of the side grippers and reducing the difficulty of the movement of the side grippers.

[0050] like Figure 2 As shown, a first placement rack 41 is placed in the first space 4, and a plurality of side grippers are placed on the first placement rack 41; the vehicle body assembly system also includes a first robot 42, which is installed in the first space 4 and is used to install the side grippers on the first placement rack 41 onto the moving parts.

[0051] In this embodiment, the side grippers are transported and installed by the first robot 42, which is beneficial to the automated transportation and installation of the side grippers, reduces the labor cost of the vehicle body assembly system, and is beneficial to shortening the transportation and installation period of the side grippers, thereby shortening the welding and fixing period of the vehicle body assembly structure 7.

[0052] Among them, at least a first model of side grippers and a second model of side grippers are placed on the first placement rack 41, that is, at least two models of side grippers can be placed on the first placement rack 41, and each model of side grippers can correspond to a model and size of the body assembly structure 7. When the model of the body assembly structure 7 on the assembly station 1 changes, the first robot 42 can replace the model of the side grippers on the moving part so that the model of the side grippers corresponds to the model of the body assembly structure 7, thereby facilitating the fixation of the side grippers to the body assembly structure 7, and also improving the stability of the fixation of the side grippers to the body assembly structure 7, thereby improving the applicability of the body assembly system, so that one body assembly system can weld and fix multiple models of body assembly structures 7.

[0053] In addition, if Figure 2 As shown, the first space 4 is further provided with a first trolley 43, on which a third type of side gripper is placed. When the type of side gripper on the first placement rack 41 does not correspond to the type of vehicle body assembly structure 7 at the assembly station 1, a third type of side gripper corresponding to the type of vehicle body assembly structure 7 can be placed on the first trolley 43, thereby further expanding the applicability of the vehicle body assembly system.

[0054] like Figure 2As shown, a second placement rack 44 is also placed in the first space 4, and a welding clamp is placed on the second placement rack 44. The first robot 42 is also used to grab the welding clamp to weld and fix the side panels; along the second direction Y, the first robot 42 is relatively arranged on both sides of the general assembly station 1.

[0055] In this embodiment, after the first robot 42 secures the side grippers to the movable member, the side grippers can be moved by the movable member and engage with the vehicle body assembly structure 7, thereby securing the vehicle body assembly structure 7 in a limited position on the assembly station 1. Thereafter, the first robot 42 grabs the welding tongs on the second placement rack 44 to weld and secure the vehicle body assembly structure 7. The first robot 42 has both the functions of transporting the side grippers and welding, which reduces the number of robots required, thereby lowering the density of robot deployment and the space required for machine installation, thereby facilitating a reduction in the overall size of the vehicle body assembly system. Along the second direction Y, the first robots 42 are positioned relative to each other on either side of the assembly station 1. That is, the first robots 42 weld and secure the vehicle body assembly structure 7 from both sides, thereby reducing the travel distance of the first robot 42 in the second direction Y, thereby lowering the requirements for the size, performance, and other parameters of the first robot 42, and thus reducing the cost of the first robot 42.

[0056] In any of the above embodiments, Figure 2 As shown, the moving part, the side gripper and the first placement rack 41 are all arranged on both sides of the assembly station 1 in the second direction Y, so as to facilitate positioning of the vehicle body assembly structure 7 from both sides, thereby improving the positioning accuracy of the vehicle body assembly structure 7.

[0057] In any of the above embodiments, Figure 2 As shown, the vehicle body assembly system also includes a third placement rack, which is installed on the second platform 3 and located in the second space 5, and a plurality of rear grippers are placed on the third placement rack; the vehicle body assembly system also includes a second robot 51, which is installed on the second platform 3 and located in the second space 5, and the second robot 51 is used to grab the rear grippers on the third placement rack so that the rear grippers fix the rear crossbeam of the top cover; at least the first model of rear grippers and the second model of rear grippers are placed on the third placement rack.

[0058] In this embodiment, the rear gripper is transported and installed by the second robot 51, which facilitates automated transport and installation of the rear gripper, reduces labor costs for the vehicle body assembly system, and shortens the transport and installation cycle of the rear gripper, thereby shortening the welding and fixing cycle of the vehicle body assembly structure 7. Placing the third placement rack within the second space 5 facilitates the second robot 51 to grasp the rear gripper on the third placement rack. At least a first model of rear gripper and a second model of rear gripper are placed on the second placement rack 44, that is, at least two models of rear grippers can be placed on the second placement rack 44, and each model of rear gripper can correspond to a model and size of the body assembly structure 7. When the model of the body assembly structure 7 on the assembly station 1 changes, the second robot 51 can replace the model of the rear gripper on the moving part so that the model of the rear gripper corresponds to the model of the body assembly structure 7, thereby facilitating the fixation of the rear gripper to the body assembly structure 7, and also improving the stability of the fixation of the rear gripper to the body assembly structure 7, thereby improving the applicability of the body assembly system, so that one body assembly system can weld and fix multiple models of body assembly structures 7.

[0059] In addition, the vehicle body assembly system includes a second trolley 52 mounted on the second platform 3 and located in the second space 5. A third model of rear grippers is placed on the second trolley 52. If the model of rear grippers on the second placement rack 44 does not correspond to the model of the vehicle body assembly structure 7 at the assembly station 1, a third model of rear grippers corresponding to the model of the vehicle body assembly structure 7 can be placed on the second trolley 52, thereby further expanding the applicability of the vehicle body assembly system.

[0060] In any of the above embodiments, Figure 2 As shown, the vehicle body assembly system also includes a third robot 53 and a fourth robot 54. The third robot 53 is installed on the first platform 2 and located in the second space 5. The third robot 53 is used to weld and fix the front cross beam of the roof of the vehicle body assembly structure 7. The fourth robot 54 is installed on the second platform 3 and located in the second space 5. The fourth robot 54 is used to weld and fix the rear cross beam of the roof. The number of third robots 53 is at least two, and the third robots 53 are distributed along the second direction Y; and / or the number of fourth robots 54 is at least two, and the fourth robots 54 are distributed along the second direction Y.

[0061] In this embodiment, the third robot 53 and the fourth robot 54 for welding the upper portion of the vehicle body assembly structure 7 are respectively arranged on both sides of the assembly station 1 in the first direction X. At the same time, the third robot 53, the fourth robot 54 and the first robot 42 are distributed in the third direction Z, which reduces the movement distance of the third robot 53 and the fourth robot 54 in the first direction X and the third direction Z, thereby reducing the requirements for the size, performance and other parameters of the third robot 53 and the fourth robot 54, thereby reducing the cost of the third robot 53 and the fourth robot 54. In addition, the third robot 53 and the fourth robot 54 are distributed in the first direction X, and the third robot 53, the fourth robot 54 and the first robot 42 are distributed in the third direction Z, thereby reducing the distribution density of the robots within the plane defined by the first direction X and the second direction Y, which is conducive to reducing the overall structure of the vehicle body assembly system, increasing the operating space of the robots, reducing the risk of damage caused by interference between adjacent robots, and shortening the waiting time of adjacent robots when one robot moves, thereby facilitating the shortening of the working cycle of the vehicle body assembly system. The third robot 53 is distributed along the second direction Y, which reduces the moving distance of the third robot 53 in the second direction Y, thereby reducing the requirements for the size, performance and other parameters of the third robot 53, thereby reducing the cost of the third robot 53; the fourth robot 54 is distributed along the second direction Y, which reduces the moving distance of the fourth robot 54 in the second direction Y, thereby reducing the requirements for the size, performance and other parameters of the fourth robot 54, thereby reducing the cost of the fourth robot 54.

[0062] In any of the above embodiments, Figure 2 As shown, the vehicle body assembly system further includes a fifth robot 45 . The fifth robot 45 and the first robot 42 are distributed on both sides of the assembly station 1 in the first direction X. The fifth robot 45 is used for welding and fixing the tail end plate of the vehicle body assembly structure 7 .

[0063] In this embodiment, the fifth robot 45 and the first robot 42 are distributed in the first direction X, which reduces the moving distance of the fifth robot 45 and the first robot 42 in the first direction X, thereby reducing the requirements for the size, performance and other parameters of the fifth robot 45 and the first robot 42, thereby reducing the cost of the fifth robot 45 and the first robot 42.

[0064] In any of the above embodiments, Figure 3 and Figure 4As shown, the first platform 2 and the second platform 3 are both supported by the support columns 6, so that the first platform 2 and the second platform 3 divide the space into a first space 4 and a second space 5. Specifically, in the third direction Z, the height of the lower surface of the first platform 2 is greater than 2.m and less than or equal to 3.1m from the ground, that is, the setting height of the first platform 2 is equal to or higher than the vehicle body assembly structure 7 on the assembly station 1, and the minimum vertical distance H1 between the first platform 2 and the vehicle body assembly structure 7 in the third direction Z satisfies: 0

[0065] ​In this embodiment, if the heights of the first platform 2 and the second platform 3 are lower than the height of the vehicle body assembly structure 7 on the assembly station 1, there is a risk of interference between the vehicle body assembly structure 7 and the first platform 2 and the second platform 3 during the movement of the vehicle body assembly structure 7 to the assembly station 1 and during the movement of the vehicle body assembly structure 7 on the assembly station 1 to the next station; if H1>0.5m, H2>0.5m, the direct distance between the first platform 2, the second platform 3 and the vehicle body assembly structure 7 is large, and the moving distance in the third direction Z of the third robot 53 and the fourth robot 54 on the first platform 2 and the second platform 3 during welding is large, which increases the processing difficulty of the third robot 53 and the fourth robot 54, and also increases the requirements for the size, performance and other parameters of the third robot 53 and the fourth robot 54, thereby making the cost of the third robot 53 and the fourth robot 54 higher. Therefore, 0

[0066] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.​

Claims

1. A vehicle body assembly system, characterized in that: The vehicle body assembly system includes: A general assembly station (1), wherein the general assembly station (1) is used to place a vehicle body general assembly structure (7); A first platform (2) and a second platform (3), along a first direction (X), the first platform (2) and the second platform (3) are relatively arranged on both sides of the general assembly station (1); along a third direction (Z), the first platform (2) and the second platform (3) are arranged at a height higher than the general assembly station (1); the first platform (2) and the second platform (3) divide the space in the third direction (Z) into a first space (4) and a second space (5); the general assembly station (1) is located in the first space (4); A positioning assembly, the positioning assembly comprising side grips and a rear grip, the side grips being mounted in the first space (4) and used to fix the lower mounting plate and side panels of the vehicle body assembly structure (7), the rear grips being mounted on the second platform (3) and located in the second space (5), and the rear grips being used to fix the rear cross beam of the top cover of the vehicle body assembly structure (7).

2. The vehicle body assembly system according to claim 1, characterized in that: The positioning assembly further comprises a moving part, which is connected to the side gripper and is used to drive the side gripper to move toward or away from the overall assembly station (1) along the first direction (X) and / or the second direction (Y).

3. The vehicle body assembly system according to claim 2, characterized in that: A first placement rack (41) is placed in the first space (4), and a plurality of side grippers are placed on the first placement rack (41); The vehicle body assembly system further comprises a first robot (42), which is installed in the first space (4), and is used to install the side gripper on the first placement rack (41) onto the moving part.

4. The vehicle body assembly system according to claim 3, characterized in that: At least the first type of side gripper and the second type of side gripper are placed on the first placement rack (41).

5. The vehicle body assembly system according to claim 4, characterized in that: The first space (4) is further provided with a first trolley (43), on which the side gripper of the third model is placed.

6. The vehicle body assembly system according to claim 3, characterized in that: A second placement rack (44) is also placed in the first space (4), a welding clamp is placed on the second placement rack (44), and the first robot (42) is also used to grab the welding clamp to weld and fix the side panel; Along the second direction (Y), the first robot (42) is relatively arranged on both sides of the general assembly station (1).

7. The vehicle body assembly system according to any one of claims 1 to 6, characterized in that: The vehicle body assembly system further comprises a third placement rack, the third placement rack being mounted on the second platform (3) and located in the second space (5), and a plurality of the rear grippers being placed on the third placement rack; The vehicle body assembly system further includes a second robot (51), the second robot (51) being mounted on the second platform (3) and located in the second space (5), the second robot (51) being used to grab the rear gripper on the third placement rack so that the rear gripper fixes the rear crossbeam of the roof; At least the first model of the rear gripper and the second model of the rear gripper are placed on the third placement rack.

8. The vehicle body assembly system according to claim 7, characterized in that: The vehicle body assembly system further comprises a second trolley (52), which is mounted on the second platform (3) and located in the second space (5), and the rear gripper of the third model is placed on the second trolley (52).

9. The vehicle body assembly system according to any one of claims 1 to 6, characterized in that: The vehicle body assembly system further comprises a third robot (53) and a fourth robot (54), wherein the third robot (53) is mounted on the first platform (2) and located in the second space (5), and the third robot (53) is used to weld and fix the front cross beam of the top cover of the vehicle body assembly structure (7), and the fourth robot (54) is mounted on the second platform (3) and located in the second space (5), and the fourth robot (54) is used to weld and fix the rear cross beam of the top cover; The number of the third robots (53) is at least two, and the third robots (53) are distributed along the second direction (Y); and / or, The number of the fourth robots (54) is at least two, and the fourth robots (54) are distributed along the second direction (Y).

10. The vehicle body assembly system according to any one of claims 1 to 6, characterized in that: In the third direction (Z), the height of the first platform (2) is equal to or higher than the vehicle body assembly structure (7) on the assembly station (1), and the minimum vertical distance H1 between the first platform (2) and the vehicle body assembly structure (7) in the third direction (Z) satisfies: 0<H1≤0.5m; In the third direction (Z), the second platform (3) is arranged at a height equal to or higher than the vehicle body assembly structure (7) on the assembly station (1), and a minimum vertical distance H2 between the second platform (3) and the vehicle body assembly structure (7) in the third direction (Z) satisfies: 0<H2≤0.5m.

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