A new energy vehicle body-in-white coating jig, method and vehicle body assembly method

Abstract

The present application belongs to the technical field of new energy vehicles, and particularly relates to a body-in-white coating jig and method of a new energy vehicle and a vehicle body assembly method, a support frame and a fixing frame fixedly installed on the support frame; the support frame is used for being installed on a coating conveying line, the fixing frame extends along a first horizontal direction, and the fixing frame is divided into three installation sections arranged in sequence along the first horizontal direction; wherein one side of the first installation section is used for detachably and fixedly connecting a left side wall assembly, a left front door assembly and a left rear door assembly, the other side is used for detachably and fixedly connecting a right side wall assembly, a right front door assembly and a right rear door assembly of the body-in-white, two sides of the second installation section are respectively used for detachably and fixedly connecting a left front fender assembly and a right front fender assembly, two sides of the third installation section are respectively used for detachably and fixedly connecting a front cover assembly and a rear cover assembly, and one end surface of the support frame is used for detachably and fixedly connecting a front compartment assembly.

Description

Technical Field

[0001] This invention belongs to the field of new energy vehicle technology, specifically relating to a white body painting fixture, method, and vehicle body assembly method for new energy vehicles. Background Technology

[0002] With the development of new energy vehicles, CTC (Cell-to-Chassis) battery integration technology has become one of the industry trends. This technology integrates the battery pack directly into the chassis structure, eliminating the traditional battery pack cover and fundamentally changing the body-in-white structure.

[0003] Because the battery cells and high-voltage components in the battery chassis assembly (also known as the integrated battery chassis assembly) of CTC model new energy vehicles are strictly prohibited from being subjected to high-temperature baking (usually 160℃-180℃) and strong chemical corrosion environment in the painting workshop, the battery chassis assembly of CTC model new energy vehicles cannot be painted on the same line as the body-in-white.

[0004] The existing CTC (Completely Turbine Carrier) model of new energy vehicles typically involves welding and assembling various sub-assemblies (usually including the left side panel assembly, right side panel assembly, left front fender assembly, right front fender assembly, left front door assembly, left rear door assembly, right front door assembly, right rear door assembly, hood assembly, rear hood assembly, and front compartment assembly) together to form a complete body-in-white. This complete body-in-white is then transported to the painting workshop for painting. Finally, the battery chassis assembly is assembled with the painted body-in-white to form the vehicle body.

[0005] However, this also means that the production cycle of the painting process of the body-in-white of existing CTC models of new energy vehicles will be constrained by the overall welding efficiency of the body-in-white, making it difficult to keep up with the production cycle of the battery chassis assembly process. This affects the production efficiency of the assembly process of the battery chassis assembly and the body-in-white, thereby extending the production cycle of the whole vehicle and causing production capacity loss. Summary of the Invention

[0006] To address the shortcomings of the existing technology, this invention provides a white body painting fixture, method, and vehicle assembly method for new energy vehicles. This solves the technical problem that the production cycle of the white body painting process for existing CTC (Continuous Transmission Controlled) new energy vehicles is constrained by the overall welding efficiency of the white body, making it difficult to keep up with the production cycle of the battery chassis assembly process. This affects the production efficiency of the battery chassis assembly and white body assembly processes, thereby extending the overall vehicle production cycle and causing production capacity losses.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: A white body painting fixture for a new energy vehicle includes: a support frame and a fixing frame fixedly mounted on the support frame; The support frame is used for installation on the coating conveyor line, and the fixing frame extends along a first horizontal direction. The fixing frame is divided into three installation sections arranged sequentially along the first horizontal direction. The first installation section of the three installation sections is fixedly installed with a set of first connecting components on both sides of the second horizontal direction; one of the first connecting components is used to detachably and fixedly connect the left side panel assembly of the body-in-white of the new energy vehicle, as well as the left front door assembly and the left rear door assembly installed on the left side panel assembly; the other first connecting component is used to detachably and fixedly connect the right side panel assembly of the body-in-white, as well as the right front door assembly and the right rear door assembly installed on the right side panel assembly, wherein the second horizontal direction and the first horizontal direction are perpendicular to each other; The second mounting section of the three mounting sections is fixedly mounted with a set of second connecting components on both sides in the second horizontal direction; the two second connecting components are respectively used to detachably and fixedly connect the left front fender assembly and the right front fender assembly of the body-in-white; The third mounting section of the three mounting sections is fixedly mounted with a third connecting component and a fourth connecting component on both sides of the second horizontal direction; the third connecting component is used to detachably and fixedly connect the front cover assembly of the body-in-white, and the fourth connecting component is used to detachably and fixedly connect the rear cover assembly of the body-in-white. The support frame has a fifth connecting component fixedly installed on one end face in the first horizontal direction; the fifth connecting component is used for detachably and fixedly connecting the front compartment assembly of the body-in-white.

[0008] By detachably and fixedly connecting the left side panel assembly, right side panel assembly, left front fender assembly, right front fender assembly, left front door assembly, left rear door assembly, right front door assembly, right rear door assembly, front hood assembly, rear hood assembly, and front compartment assembly of the body-in-white to the body-in-white painting fixture of the new energy vehicle installed on the painting conveyor line, the welded left side panel assembly, right side panel assembly, left front fender assembly, right front fender assembly, left front door assembly, and left rear door assembly can be painted. The door assembly, the right front door assembly, the right rear door assembly, the hood assembly, the rear hood assembly, and the front compartment assembly are painted in parallel. The overall welding process of the body-in-white is merged into the subsequent assembly process of the body-in-white and the battery chassis assembly, forming the subsequent vehicle body (including the body-in-white and the battery chassis assembly) assembly process. This breaks the traditional strong sequential mode of "welding, painting, and final assembly". The production cycle is more flexible, allowing the production cycle of the body-in-white painting process and the battery chassis assembly process to be synchronized, which can effectively shorten the production cycle of the whole vehicle and reduce production capacity loss.

[0009] By painting the left side panel assembly, the right side panel assembly, the left front fender assembly, the right front fender assembly, the left front door assembly, the left rear door assembly, the right front door assembly, the right rear door assembly, the hood assembly, the rear hood assembly, and the front compartment assembly in parallel, compared to the existing painting process for the body-in-white of CTC models, the complete body-in-white is transported to the painting workshop for painting. This process can completely expose or open the closed cavity structures formed after the overall welding (such as the inner side panel and sill cavity), which were previously difficult to handle. This eliminates blind spots for corrosion protection, reduces the risk of rust on the body-in-white, and improves the corrosion resistance of the body-in-white.

[0010] Furthermore, the white body painting fixture for the new energy vehicle also includes two first support components fixedly installed on the support frame; Two first support components are respectively disposed on both sides of the first mounting section in the second direction; the two support components are respectively used to position and support the bottom end of the left sill beam of the left side panel assembly and the bottom end of the right sill beam of the right side panel assembly, and to make the left side panel assembly and the right side panel assembly, which are positioned and supported on the two first support components, face the first mounting section from the inside. The two first connecting components are respectively used for a detachable fixed connection to the inside of the left side panel assembly and a detachable fixed connection to the inside of the right side panel assembly.

[0011] Furthermore, the first connection component includes a first connector, a second connector, and a third connector; The first connector, the second connector, and the third connector are arranged sequentially along the first horizontal direction; The first connector is used for a detachable and fixed connection with the inside of the left A-pillar of the left side of the left side assembly or the inside of the right A-pillar of the right side assembly; the second connector is used for a detachable and fixed connection with the inside of the left B-pillar of the left side assembly or the inside of the right B-pillar of the right side assembly; the third connector is used for a detachable and fixed connection with the inside of the left D-pillar of the left side assembly or the inside of the right D-pillar of the right side assembly.

[0012] Furthermore, the second connection component includes a fourth connector and a fifth connector; The fourth connector is used for a detachable and fixed connection with the inner side of the upper part of the rear end of the left front fender assembly or the inner side of the upper part of the rear end of the right front fender assembly. The fifth connector is used for a detachable and fixed connection to the inner side of the lower rear end of the left front fender assembly or the inner side of the lower rear end of the right front fender assembly.

[0013] Furthermore, the white body painting fixture for the new energy vehicle also includes a second support component and a third support component fixedly installed on the support frame; The second support assembly and the third support assembly are respectively disposed on both sides of the third mounting section in the second direction; the second support assembly is used to position and support the front end face of the front cover assembly, and to make the inner side of the front cover assembly positioned and supported on the second support assembly face the third connecting assembly on the third mounting section; The third support component is used to position and support the bottom end face of the rear cover assembly, and to position the inner side of the rear cover assembly, which is positioned and supported on the third support component, toward the fourth connecting component on the third mounting section.

[0014] Furthermore, the third connecting component includes two sixth connecting members arranged sequentially along the first horizontal direction; the fourth connecting component includes two seventh connecting members arranged sequentially along the first horizontal direction. The two sixth connectors are respectively used for detachable fixed connection to the inner side of the left rear end of the front cover assembly and detachable fixed connection to the inner side of the right rear end of the front cover assembly. The two seventh connectors are respectively used for a detachable fixed connection to the inner side of the left side of the top of the rear cover assembly and a detachable fixed connection to the inner side of the right side of the top of the rear cover assembly.

[0015] Furthermore, the fifth connecting component includes an eighth connector and a ninth connector; The eighth connector and the ninth connector are respectively used for detachable fixed connection with the left front longitudinal beam of the front compartment assembly and detachable fixed connection with the right front longitudinal beam of the front compartment assembly, or respectively used for detachable fixed connection with the left upper side beam of the front compartment assembly and detachable fixed connection with the right upper side beam of the front compartment assembly, so as to fix the left side or right side of the front compartment assembly to the support frame with the left side facing down or the right side facing down.

[0016] Furthermore, the white body painting fixture for the new energy vehicle also includes a fourth support component fixedly installed on the support frame; The fourth support assembly is used to support the left side of the front bulkhead of the front compartment assembly fixed to the support frame with its left side facing downward, or to support the right side of the front bulkhead of the front compartment assembly fixed to the support frame with its right side facing downward.

[0017] Based on the white body painting fixture for new energy vehicles provided by this invention, this invention also provides a white body painting method for new energy vehicles, the white body painting method comprising: The welding and assembly processes for the left side panel assembly, right side panel assembly, left front fender assembly, right front fender assembly, left front door assembly, left rear door assembly, right front door assembly, right rear door assembly, hood assembly, rear cover assembly, and front compartment assembly of the body-in-white of the new energy vehicle are performed concurrently. The left front door assembly and the left rear door assembly, which have been welded and assembled, are installed onto the left side panel assembly, which has been welded and assembled, to form a left connecting body. The right front door assembly and the right rear door assembly, which have been welded and assembled, are installed onto the right side panel assembly, which has been welded and assembled, to form a right connecting body. The left connector, the right connector, and the welded and assembled left front fender assembly, right front fender assembly, front cover assembly, rear cover assembly, and front compartment assembly are all detachably and fixedly installed onto the white body painting fixture of the new energy vehicle provided by the present invention, which is installed on the painting conveyor line. Start the painting conveyor line to complete the painting process of the body-in-white.

[0018] Based on the body-in-white painting method for new energy vehicles provided by this invention, this invention also provides a vehicle body assembly method for new energy vehicles. The vehicle body assembly method includes: performing a painting process for the body-in-white of a new energy vehicle using the body-in-white painting method provided by this invention to obtain a painted left connector, a right connector, a left front fender assembly, a right front fender assembly, a front hood assembly, a rear hood assembly, and a front compartment assembly; and performing a parallel assembly process for the battery chassis assembly of the new energy vehicle to obtain a fully assembled battery chassis assembly. The painted left connector, right connector, left front fender assembly, right front fender assembly, front cover assembly, rear cover assembly, front compartment assembly, and battery floor assembly, along with the assembled battery chassis assembly, are assembled in a specific order to obtain the vehicle body of the new energy vehicle.

[0019] The white body painting fixture, method, and vehicle body assembly method for new energy vehicles provided by this invention have at least the following technical effects or advantages: 1. By detachably and fixedly connecting the left side panel assembly, the right side panel assembly, the left front fender assembly, the right front fender assembly, the left front door assembly, the left rear door assembly, the right front door assembly, the right rear door assembly, the front hood assembly, the rear hood assembly, and the front compartment assembly of the body-in-white to the body-in-white painting fixture of the new energy vehicle installed on the painting conveyor line, the welded left side panel assembly, the right side panel assembly, the left front fender assembly, the right front fender assembly, the left front door assembly, and the left rear door assembly can be painted. The rear door assembly, the right front door assembly, the right rear door assembly, the front hood assembly, the rear hood assembly, and the front compartment assembly are painted in parallel. The overall welding process of the body-in-white is merged into the subsequent assembly process of the body-in-white and the battery chassis assembly, forming the subsequent vehicle body (including the body-in-white and the battery chassis assembly) assembly process. This breaks the traditional strong sequential mode of "welding, painting, and final assembly". The production cycle is more flexible, allowing the production cycle of the body-in-white painting process and the battery chassis assembly process to be synchronized, which can effectively shorten the production cycle of the whole vehicle and reduce production capacity loss.

[0020] 2. By painting the left side panel assembly, the right side panel assembly, the left front fender assembly, the right front fender assembly, the left front door assembly, the left rear door assembly, the right front door assembly, the right rear door assembly, the hood assembly, the rear hood assembly, and the front compartment assembly in parallel, compared to the existing painting process for the body-in-white of new energy vehicles in CTC models, the complete body-in-white is transported to the painting workshop for painting. This process can completely expose or open the closed cavity structures formed after the overall welding (such as the inner side panel and sill cavity), which were previously difficult to handle. This eliminates blind spots for corrosion prevention, reduces the risk of rust on the body-in-white, and improves the corrosion resistance of the body-in-white.

[0021] 3. By detachably and fixedly connecting the left connecting body, the right connecting body, the left front fender assembly, the right front fender assembly, the front cover assembly, the rear cover assembly, and the front compartment assembly to the white body painting fixture of the new energy vehicle provided by the present invention, compared with the white body welded as a whole, the left connecting body, the right connecting body, the left front fender assembly, the right front fender assembly, the front cover assembly, the rear cover assembly, and the front compartment assembly can be arranged more compactly on the painting conveyor line, which can save a lot of space (at least partially saving the space occupied by the cockpit in the white body welded as a whole), thereby reducing the design size of equipment such as pretreatment tanks, electric pools, and painting ovens in the painting workshop, reducing the floor area of ​​the painting workshop, and reducing energy consumption and chemical consumption.

[0022] 4. Since the left connector, the right connector, the left front fender assembly, the right front fender assembly, the front cover assembly, the rear cover assembly, and the front compartment assembly are in a disassembled state, compared to the welded whole body-in-white, during the painting process, the pretreatment liquid and electrophoretic liquid can fully rinse the inner and outer surfaces of the left connector, the right connector, the left front fender assembly, the right front fender assembly, the front cover assembly, the rear cover assembly, and the front compartment assembly, resulting in smoother drainage and venting, and significantly improving the painting quality. Attached Figure Description

[0023] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural schematic diagram of the white body painting fixture for new energy vehicles in the embodiment; Figure 2 This is a schematic diagram of the installation structure of the body-in-white painting fixture for the body-in-white and the new energy vehicle in the embodiment; Figure 3 This is a three-dimensional structural diagram of the first mounting section in the embodiment; Figure 4 This is a schematic diagram of the installation structure of the right side enclosure assembly and the first mounting section in the embodiment; Figure 5 This is a structural schematic diagram of the right side enclosure assembly in the embodiment; Figure 6 This is a three-dimensional structural diagram of the second mounting section in the embodiment; Figure 7 This is a schematic diagram of the mounting structure of the right front fender assembly and the second mounting section in the embodiment; Figure 8 This is a schematic diagram of the right front fender assembly in the embodiment; Figure 9 This is a three-dimensional structural diagram of the third installation section in the embodiment; Figure 10 This is a schematic diagram of the installation structure of the front cover assembly and the third mounting section in the embodiment; Figure 11 This is a structural schematic diagram of the rear cover assembly in the embodiment; Figure 12 yes Figure 1 A magnified view of a portion of region A in the middle; Figure 13 This is a schematic diagram of the mounting structure on the front compartment assembly and the body-in-white painting fixture in the embodiment; Figure 14 This is a three-dimensional structural diagram of the front compartment assembly in the embodiment; Figure 15 This is a partial structural diagram of the front cabin assembly in the embodiment. Figure 1 ; Figure 16 This is a partial structural diagram of the front cabin assembly in the embodiment. Figure 2 ; Figure 17 This is a partial structural diagram of the front cabin assembly in the embodiment. Figure 3 ; Figure 18 It is a cross-sectional comparison diagram of the coating drying oven perpendicular to the conveying direction; Among them, 1-support frame, 2-fixed frame, 3-first connecting assembly, 4-left side panel assembly, 5-right side panel assembly, 6-right front door assembly, 7-right rear door assembly, 8-second connecting assembly, 9-left front fender assembly, 10-right front fender assembly, 11-third connecting assembly, 12-fourth connecting assembly, 13-front hood assembly, 14-rear hood assembly, 15-fifth connecting assembly, 16-front compartment assembly, 17-first support assembly, 18-second support assembly, 19-third support assembly, 20-fourth support assembly, 21-first painting oven, 22-second painting oven; 3.1 - First connector, 3.2 - Second connector, 3.3 - Third connector; 5.1 - Right door sill beam; 5.2 - Right A-pillar; 5.3 - Right B-pillar; 5.4 - Right D-pillar; 5.2.1 - Right A-pillar positioning hole; 5.3.1 - Right B-pillar positioning hole; 5.4 - Right D-pillar positioning hole; 8.1 - Fourth connector, 8.2 - Fifth connector; 10.1 - First rear positioning hole; 10.2 - First lower positioning hole; 11.1 - Sixth connector; 12.1 - Seventh connector; 14.1 - Upper left positioning hole; 14.2 - Upper right positioning hole; 15.1 - Eighth connector, 15.2 - Ninth connector; 16.1 - Left front longitudinal beam, 16.2 - Right front longitudinal beam, 16.3 - Left upper side beam, 16.4 - Right upper side beam, 16.5 - Front panel; 16.1.1 - First positioning hole; 16.2.1 - Second positioning hole; 16.5.1 - Right side of the front bulkhead. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] Example 1: like Figure 1 and Figure 2 As shown, Embodiment 1 provides a white body painting fixture for a new energy vehicle, including: a support frame 1 and a fixing frame 2 fixedly installed on the support frame 1; The support frame 1 is used to be installed on the coating conveyor line, and the fixing frame 2 extends along the first horizontal direction. The fixing frame 2 is divided into three installation sections arranged sequentially along the first horizontal direction. The first installation section of the three installation sections is fixedly installed with a set of first connecting components 3 on both sides of the second horizontal direction; one of the first connecting components 3 is used to detachably and fixedly connect the left side panel assembly 4 of the body-in-white of the new energy vehicle, as well as the left front door assembly and the left rear door assembly installed on the left side panel assembly 4; the other first connecting component 3 is used to detachably and fixedly connect the right side panel assembly 5 of the body-in-white, as well as the right front door assembly 6 and the right rear door assembly 7 installed on the right side panel assembly 5, and the second horizontal direction and the first horizontal direction are perpendicular to each other; The second mounting section of the three mounting sections is fixedly mounted with a set of second connecting components 8 on both sides in the second horizontal direction; the two second connecting components 8 are used to detachably and fixedly connect the left front fender assembly 9 and the right front fender assembly 10 of the body-in-white. The third mounting section of the three mounting sections is fixedly mounted with a third connecting component 11 and a fourth connecting component 12 on both sides of the second horizontal direction, respectively; the third connecting component 11 is used to detachably and fixedly connect the front cover assembly 13 of the body-in-white, and the fourth connecting component 12 is used to detachably and fixedly connect the rear cover assembly 14 of the body-in-white. A fifth connecting component 15 is fixedly mounted on one end face of the support frame 1 in the first horizontal direction; the fifth connecting component 15 is used for detachable fixed connection to the front compartment assembly 16 of the body-in-white.

[0027] By detachably and securely connecting the left side panel assembly 4, right side panel assembly 5, left front fender assembly 9, right front fender assembly 10, left front door assembly, left rear door assembly, right front door assembly 6, right rear door assembly 7, hood assembly 13, rear cover assembly 14, and front compartment assembly 16 of the body-in-white to the painting fixture for the body-in-white of new energy vehicles installed on the painting conveyor line, the welded left side panel assembly 4, right side panel assembly 5, left front fender assembly 9, right front fender assembly 10, left front door assembly, left rear door assembly, and right front door assembly 16 can be painted. The door assembly 6, right rear door assembly 7, front hood assembly 13, rear hood assembly 14, and front compartment assembly 16 are painted in parallel; the overall welding process of the body-in-white is merged into the subsequent assembly process of the body-in-white and battery chassis assembly, forming the subsequent vehicle body (including body-in-white and battery chassis assembly) assembly process; this breaks the traditional strong sequential mode of "welding, painting, and final assembly"; the production cycle is more flexible, enabling the production cycle of the body-in-white painting process and the battery chassis assembly process to be synchronized, which can effectively shorten the production cycle of the whole vehicle and reduce production capacity loss.

[0028] By painting the left side panel assembly 4, right side panel assembly 5, left front fender assembly 9, right front fender assembly 10, left front door assembly, left rear door assembly, right front door assembly 6, right rear door assembly 7, front hood assembly 13, rear hood assembly 14, and front compartment assembly 16 in parallel, compared to the existing CTC model's body-in-white painting process, the complete body-in-white is transported to the painting workshop for painting. This process can completely expose or open the previously difficult-to-handle closed cavity structures formed after overall welding (such as the inner side panel and sill cavity), eliminating blind spots for corrosion prevention, reducing the risk of rust on the body-in-white, and improving the corrosion resistance of the body-in-white.

[0029] It should be noted that all descriptions of the directions "front", "rear", "left", "right", "top", and "bottom" in this invention correspond one-to-one with the front, rear, left, right, top, and bottom directions of the vehicle.

[0030] Preferably, in this embodiment 1, as Figures 1 to 4 As shown, the white body painting fixture for new energy vehicles also includes two first support components 17 fixedly installed on the support frame 1; Two first support components 17 are respectively disposed on both sides of the first mounting section in the second direction; the two support components are respectively used to position and support the bottom end of the left sill beam of the left side enclosure assembly 4 and the bottom end of the right sill beam 5.1 of the right side enclosure assembly 5, and make the left side enclosure assembly 4 and the right side enclosure assembly 5, which are positioned and supported on the two first support components 17, face the first mounting section from the inside. The two first connecting components 3 are respectively used for a detachable fixed connection with the inside of the left side assembly 4 and a detachable fixed connection with the inside of the right side assembly 5.

[0031] Specifically, in this embodiment 1, as follows Figure 1 , Figure 3 and Figure 4 As shown, the first support assembly 17 includes a plurality of first support blocks arranged sequentially along the first direction. Each first support block has a first limiting block formed on the side of its upper surface away from the fixing frame 2. The upper surface of the first support block is used to support the bottom end of the left sill beam of the left side enclosure assembly 4 or the bottom end of the right sill beam 5.1 of the right side enclosure assembly 5. The first limiting block is used to fit against the outer side of the left sill beam or the outer side of the right sill beam 5.1.

[0032] Specifically, in this embodiment 1, as follows: Figure 3 and Figure 4 As shown, the first connecting component 3 includes a first connector 3.1, a second connector 3.2, and a third connector 3.3; The first connector 3.1, the second connector 3.2, and the third connector 3.3 are arranged sequentially along the first horizontal direction; The first connector 3.1 is used for a detachable fixed connection with the inside of the left A-pillar of the left side assembly 4 or the inside of the right A-pillar 5.2 of the right side assembly 5; the second connector 3.2 is used for a detachable fixed connection with the inside of the left B-pillar of the left side assembly 4 or the inside of the right B-pillar 5.3 of the right side assembly 5; the third connector 3.3 is used for a detachable fixed connection with the inside of the left D-pillar of the left side assembly 4 or the inside of the right D-pillar 5.4 of the right side assembly 5.

[0033] Specifically, in this embodiment 1, as follows Figures 3 to 5 As shown, one of the first connecting parts 3.1 is detachably and fixedly connected to the right A-pillar positioning hole 5.2.1 on the inner side of the right A-pillar 5.2 of the right side enclosure assembly 5 via a positioning pin, and the other first connecting part 3.1 is detachably and fixedly connected to the left A-pillar positioning hole on the inner side of the left A-pillar of the left side enclosure assembly 4 via a positioning pin. One of the second connectors 3.2 is detachably and fixedly connected to the right B-pillar positioning hole 5.3.1 on the inner side of the right B-pillar 5.3 of the right side assembly 5 via a positioning pin, and the other second connector 3.2 is detachably and fixedly connected to the left B-pillar positioning hole on the inner side of the left B-pillar of the left side assembly 4 via a positioning pin. One of the third connectors 3.3 is detachably and fixedly connected to the right D-pillar positioning hole 5.4.1 on the inner side of the right D-pillar 5.4 of the right side enclosure assembly 5 via a positioning pin, and the other second connector 3.2 is detachably and fixedly connected to the left D-pillar positioning hole on the inner side of the left D-pillar of the left side enclosure assembly 4 via a positioning pin.

[0034] It should be noted that since the left side assembly 4 and the right side assembly 5 are basically symmetrical structures, the specific structures of the left A-pillar, left B-pillar, left D-pillar, left A-pillar positioning hole, left B-pillar positioning hole and left D-pillar positioning hole can all refer to the symmetrical structure on the right side assembly 5. Therefore, the present invention does not provide a specific structural drawing of the left side assembly 4.

[0035] Preferably, in this embodiment 1, as Figure 1 , Figure 6 and Figure 7 As shown, the second connecting component 8 includes a fourth connector 8.1 and a fifth connector 8.2; The fourth connector 8.1 is used for a detachable fixed connection with the upper inner side of the rear end of the left front fender assembly 9 or the upper inner side of the rear end of the right front fender assembly 10. The fifth connector 8.2 is used for a detachable fixed connection to the inner side of the lower rear end of the left front fender assembly 9 or the inner side of the lower rear end of the right front fender assembly 10.

[0036] Specifically, in this embodiment 1, as follows Figures 6 to 8 As shown, one of the fourth connectors 8.1 is detachably fixedly connected to the first rear positioning hole 10.1 on the upper inner side of the rear end of the right front fender assembly 10 via a positioning pin, and the other fourth connector 8.1 is detachably fixedly connected to the second rear positioning hole on the upper inner side of the rear end of the left front fender assembly 9 via a positioning pin. One of the fifth connectors 8.2 is detachably fixedly connected to the first lower positioning hole 10.2 on the lower inner side of the rear end of the right front fender assembly 10 via a positioning pin, and the other fifth connector 8.2 is detachably fixedly connected to the second lower positioning hole on the lower inner side of the rear end of the left front fender assembly 9 via a positioning pin.

[0037] It should be noted that since the left front fender assembly 9 and the right front fender assembly 10 are basically symmetrical structures, the specific structures of the second rear positioning hole and the second lower positioning hole can be referenced from the symmetrical structure on the right front fender assembly 10. Therefore, the present invention does not provide a specific structural drawing of the left front fender assembly 9.

[0038] Preferred, such as Figure 1 , Figure 9 and Figure 10 As shown, the white body painting fixture for new energy vehicles also includes a second support component 18 and a third support component 19 that are fixedly installed on the support frame 1; The second support assembly 18 and the third support assembly 19 are respectively disposed on both sides of the third mounting section in the second direction; the second support assembly 18 is used to position and support the front end face of the front cover assembly 13, and to position the inner side of the front cover assembly 13, which is positioned and supported on the second support assembly 18, towards the third connecting assembly 11 on the third mounting section. The third support assembly 19 is used to position and support the bottom end face of the rear cover assembly 14, and to position the inner side of the rear cover assembly 14, which is positioned and supported on the third support assembly 19, toward the fourth connecting assembly 12 on the third mounting section.

[0039] Specifically, in this embodiment 1, as follows Figure 1 , Figure 9 and Figure 10 As shown, the second support assembly 18 includes a plurality of second support blocks arranged sequentially along the first direction. A second limiting block is formed on the side of the upper surface of each second support block away from the fixing frame 2. The upper surface of the second support block is used to support the front end face of the front cover assembly 13, and the second limiting block is used to fit against the outer side of the front end of the front cover assembly 13. The third support assembly 19 includes a plurality of third support blocks arranged sequentially along the first direction. Each third support block has a third limiting block formed on the side of its upper surface away from the fixing frame 2. The upper surface of the third support block is used to support the bottom surface of the rear cover assembly 14, and the third limiting block is used to fit against the outer side of the bottom of the rear cover assembly 14.

[0040] Preferred, such as Figure 1 , Figure 9 and Figure 10 As shown, the third connecting component 11 includes two sixth connecting members 11.1 arranged sequentially along the first horizontal direction; the fourth connecting component 12 includes two seventh connecting members 12.1 arranged sequentially along the first horizontal direction. The two sixth connectors 11.1 are respectively used for a detachable fixed connection to the inner side of the left rear end of the front cover assembly 13 and a detachable fixed connection to the inner side of the right rear end of the front cover assembly 13. The two seventh connectors 12.1 are respectively used for a detachable fixed connection to the inner side of the left side of the top of the rear cover assembly 14 and a detachable fixed connection to the inner side of the right side of the top of the rear cover assembly 14.

[0041] Specifically, in this embodiment 1, as follows Figures 9 to 11 As shown, one of the seventh connectors 12.1 is detachably fixedly connected to the upper left positioning hole 14.1 on the inner side of the left side of the top of the rear cover assembly 14 via a positioning pin, and the other seventh connector 12.1 is detachably fixedly connected to the upper right positioning hole 14.2 on the inner side of the right side of the top of the rear cover assembly 14 via a positioning pin.

[0042] The two sixth connectors 11.1 are detachably and fixedly connected to the inner side of the left rear end of the front cover assembly 13 and the inner side of the right rear end of the front cover assembly 13, respectively. The two sixth connectors 11.1 can be detachably and fixedly connected to the inherent positioning holes on the inner side of the left rear end of the front cover assembly 13 and the inherent positioning holes on the inner side of the right rear end of the front cover assembly 13, respectively, by means of positioning pins.

[0043] Preferably, in this embodiment 1, as Figure 1 , Figure 12 and Figure 13 As shown, the fifth connecting component 15 includes an eighth connector 15.1 and a ninth connector 15.2; The eighth connector 15.1 and the ninth connector 15.2 are respectively used for detachable fixed connection with the left front longitudinal beam 16.1 of the front compartment assembly 16 and the right front longitudinal beam 16.2 of the front compartment assembly 16, or respectively for detachable fixed connection with the left upper side beam 16.3 of the front compartment assembly 16 and the right upper side beam 16.4 of the front compartment assembly 16, so as to fix the left side or right side of the front compartment assembly 16 to the support frame 1 with the left side facing down or the right side facing down.

[0044] Specifically, in this embodiment 1, as follows Figure 1 , Figure 12 and Figure 13 As shown, the eighth connector 15.1 is detachably fixed to the left front longitudinal beam 16.1 of the front compartment assembly 16, and the ninth connector 15.2 is detachably fixed to the right front longitudinal beam 16.2 of the front compartment assembly 16, so as to fix the right side of the front compartment assembly 16 to the support frame 1.

[0045] Preferably, in this embodiment 1, as Figure 1 , Figure 12 , Figure 13 , Figure 14 and Figure 16 As shown, the white body painting fixture for new energy vehicles also includes a fourth support component 20 that is fixedly installed on the support frame 1; The fourth support assembly 20 is used to support the left side of the front bulkhead 16.5 of the front cabin assembly 16, which is fixed downward on the left side to the support frame 1, or to support the right side 16.5.1 of the front bulkhead 16, which is fixed downward on the right side to the support frame 1.

[0046] Specifically, in this embodiment 1, as follows Figure 1 , Figure 12 , Figure 13 , Figure 14 and Figure 16As shown, the fourth support assembly 20 is used to support the right side 16.5.1 of the front bulkhead of the front cabin assembly 16, which is fixed downwards on the support frame 1.

[0047] Specifically, in this embodiment 1, as follows Figure 12 and Figure 13 As shown, the fourth support component 20 includes a fourth support block, and a fourth limiting block is formed on the upper surface of the fourth support block. The upper surface of the fourth support block is used to support the right side 16.5.1 of the front bulkhead, and the fourth limiting block is used to fit against the rear side of the right end of the front bulkhead 16.5.

[0048] Specifically, in this embodiment 1, as follows Figures 12 to 17 As shown; the eighth connector 15.1 is detachably and fixedly connected to the first positioning hole 16.1.1 on the left front longitudinal beam 16.1 via a positioning pin, and the ninth connector 15.2 is detachably and fixedly connected to the second positioning hole 16.2.1 on the right front longitudinal beam 16.2 via a positioning pin.

[0049] Example 2: Based on the white body painting fixture for new energy vehicles provided in Example 1, Example 2 provides a white body painting method for new energy vehicles, the white body painting method including: The welding and assembly processes for the left side panel assembly 4, right side panel assembly 5, left front fender assembly 9, right front fender assembly 10, left front door assembly, left rear door assembly, right front door assembly 6, right rear door assembly 7, hood assembly 13, rear cover assembly 14, and front compartment assembly 16 of the body-in-white of the new energy vehicle are performed concurrently. The welded and assembled left front door assembly and left rear door assembly are installed onto the welded and assembled left side panel assembly 4 to form a left connecting body. The welded and assembled right front door assembly 6 and right rear door assembly 7 are installed onto the welded and assembled right side panel assembly 5 to form a right connecting body. The left connector, the right connector, and the welded and assembled left front fender assembly 9, right front fender assembly 10, front cover assembly 13, rear cover assembly 14 and front compartment assembly 16 are all detachably and fixedly installed onto the white body painting fixture of the new energy vehicle provided in Example 1, which is installed on the painting conveyor line. Start the painting conveyor line to complete the painting process of the body-in-white.

[0050] By detachably and fixedly connecting the left connector, right connector, left front fender assembly 9, right front fender assembly 10, front cover assembly 13, rear cover assembly 14, and front compartment assembly 16 to the white body painting fixture of the new energy vehicle provided by this invention, compared with the white body welded as a whole, the left connector, right connector, left front fender assembly 9, right front fender assembly 10, front cover assembly 13, rear cover assembly 14, and front compartment assembly 16 can be arranged more compactly on the painting conveyor line, which can save a lot of space (at least partially saving the space occupied by the cockpit in the white body welded as a whole), thereby reducing the design size of equipment such as pretreatment tank, electric pool, and painting oven in the painting workshop, reducing the floor area of ​​the painting workshop, and reducing energy consumption and chemical consumption.

[0051] For example, in this embodiment 2, the cross-section of the first coating oven 21 in a coating workshop using existing coating processes, perpendicular to the conveying direction, is compared with the cross-section of the second coating oven 22 in a coating workshop using the white body coating method for new energy vehicles provided in this embodiment 2, perpendicular to the conveying direction. Figure 18 As shown.

[0052] The painting workshop using the white body painting method for new energy vehicles provided in this embodiment 2 can reduce energy consumption by approximately 50% and floor space by 40% compared to painting workshops using existing painting processes.

[0053] Example 3: Based on the white body painting method for new energy vehicles provided in Example 2, Example 3 provides a vehicle body assembly method for new energy vehicles. The vehicle body assembly method includes: performing a white body painting process for the new energy vehicle using the white body painting method for new energy vehicles provided in Example 2 to obtain painted left connecting body, right connecting body, left front fender assembly 9, right front fender assembly 10, front cover assembly 13, rear cover assembly 14, and front compartment assembly 16; and performing a battery chassis assembly process for the new energy vehicle in parallel to obtain an assembled battery chassis assembly. The painted left connector, right connector, left front fender assembly 9, right front fender assembly 10, front cover assembly 13, rear cover assembly 14, front compartment assembly 16, and battery floor assembly, along with the assembled battery chassis assembly, are assembled in a specific order to obtain the body of the new energy vehicle.

[0054] The white body painting fixture, method, and vehicle body assembly method for new energy vehicles provided by this invention have at least the following technical effects or advantages: 1. By detachably and securely connecting the left side panel assembly 4, right side panel assembly 5, left front fender assembly 9, right front fender assembly 10, left front door assembly, left rear door assembly, right front door assembly 6, right rear door assembly 7, front hood assembly 13, rear hood assembly 14, and front compartment assembly 16 of the body-in-white to the body-in-white painting fixture of the new energy vehicle installed on the painting conveyor line, the welded left side panel assembly 4, right side panel assembly 5, left front fender assembly 9, right front fender assembly 10, left front door assembly, left rear door assembly, and right front door assembly 16 can be painted. The door assembly 6, right rear door assembly 7, front hood assembly 13, rear hood assembly 14, and front compartment assembly 16 are painted in parallel; the overall welding process of the body-in-white is merged into the subsequent assembly process of the body-in-white and battery chassis assembly, forming the subsequent vehicle body (including body-in-white and battery chassis assembly) assembly process; this breaks the traditional strong sequential mode of "welding, painting, and final assembly"; the production cycle is more flexible, enabling the production cycle of the body-in-white painting process and the battery chassis assembly process to be synchronized, which can effectively shorten the production cycle of the whole vehicle and reduce production capacity loss.

[0055] 2. By painting the left side panel assembly 4, right side panel assembly 5, left front fender assembly 9, right front fender assembly 10, left front door assembly, left rear door assembly, right front door assembly 6, right rear door assembly 7, front hood assembly 13, rear hood assembly 14, and front compartment assembly 16 in parallel, compared to the existing CTC model's body-in-white painting process, the complete body-in-white is transported to the painting workshop for painting. This process can completely expose or open the previously difficult-to-handle closed cavity structures formed after overall welding (such as the inner side panel and sill cavity), eliminating blind spots for corrosion prevention, reducing the risk of rust on the body-in-white, and improving the corrosion resistance of the body-in-white.

[0056] 3. By detachably and fixedly connecting the left connecting body, right connecting body, left front fender assembly 9, right front fender assembly 10, front cover assembly 13, rear cover assembly 14, and front compartment assembly 16 to the white body painting fixture of the new energy vehicle provided by the present invention, compared with the white body welded as a whole, the left connecting body, right connecting body, left front fender assembly 9, right front fender assembly 10, front cover assembly 13, rear cover assembly 14, and front compartment assembly 16 can be arranged more compactly on the painting conveyor line, which can save a lot of space (at least partially saving the space occupied by the cockpit in the white body welded as a whole), thereby reducing the design size of equipment such as pretreatment pool, electric pool, and painting oven in the painting workshop, reducing the floor area of ​​the painting workshop, and reducing energy consumption and chemical consumption.

[0057] 4. Since the left connector, right connector, left front fender assembly 9, right front fender assembly 10, front cover assembly 13, rear cover assembly 14, and front compartment assembly 16 are in a disassembled state, compared to the welded whole body-in-white, during the painting process, the pretreatment fluid and electrophoretic fluid can fully flush the inner and outer surfaces of the left connector, right connector, left front fender assembly 9, right front fender assembly 10, front cover assembly 13, rear cover assembly 14, and front compartment assembly 16, resulting in smoother drainage and venting, and significantly improving the painting quality.

[0058] The above are merely specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. All technical solutions formed by equivalent transformation or equivalent substitution fall within the scope of protection of the present invention.

Claims

1. A white body painting fixture for new energy vehicles, characterized in that, include: Support frame and fixed frame fixedly mounted on the support frame; The support frame is used for installation on the coating conveyor line, and the fixing frame extends along a first horizontal direction. The fixing frame is divided into three installation sections arranged sequentially along the first horizontal direction. The first installation section of the three installation sections is fixedly installed with a set of first connecting components on both sides of the second horizontal direction; one of the first connecting components is used to detachably and fixedly connect the left side panel assembly of the body-in-white of the new energy vehicle, as well as the left front door assembly and the left rear door assembly installed on the left side panel assembly; the other first connecting component is used to detachably and fixedly connect the right side panel assembly of the body-in-white, as well as the right front door assembly and the right rear door assembly installed on the right side panel assembly, wherein the second horizontal direction and the first horizontal direction are perpendicular to each other; The second mounting section of the three mounting sections is fixedly mounted with a set of second connecting components on both sides in the second horizontal direction; the two second connecting components are respectively used to detachably and fixedly connect the left front fender assembly and the right front fender assembly of the body-in-white; The third mounting section of the three mounting sections is fixedly mounted with a third connecting component and a fourth connecting component on both sides of the second horizontal direction; the third connecting component is used to detachably and fixedly connect the front cover assembly of the body-in-white, and the fourth connecting component is used to detachably and fixedly connect the rear cover assembly of the body-in-white. The support frame has a fifth connecting component fixedly installed on one end face in the first horizontal direction; the fifth connecting component is used for detachably and fixedly connecting the front compartment assembly of the body-in-white.

2. The white body painting fixture for new energy vehicles according to claim 1, characterized in that: It also includes two first support components that are fixedly installed on the support frame; Two first support components are respectively disposed on both sides of the first mounting section in the second direction; the two support components are respectively used to position and support the bottom end of the left sill beam of the left side panel assembly and the bottom end of the right sill beam of the right side panel assembly, and to make the left side panel assembly and the right side panel assembly, which are positioned and supported on the two first support components, face the first mounting section from the inside. The two first connecting components are respectively used for a detachable fixed connection to the inside of the left side panel assembly and a detachable fixed connection to the inside of the right side panel assembly.

3. The white body painting fixture for new energy vehicles according to claim 2, characterized in that: The first connecting component includes a first connector, a second connector, and a third connector; The first connector, the second connector, and the third connector are arranged sequentially along the first horizontal direction; The first connector is used for a detachable and fixed connection with the inside of the left A-pillar of the left side of the left side assembly or the inside of the right A-pillar of the right side assembly; the second connector is used for a detachable and fixed connection with the inside of the left B-pillar of the left side assembly or the inside of the right B-pillar of the right side assembly; the third connector is used for a detachable and fixed connection with the inside of the left D-pillar of the left side assembly or the inside of the right D-pillar of the right side assembly.

4. The white body painting fixture for new energy vehicles according to claim 1, characterized in that: The second connection component includes a fourth connector and a fifth connector; The fourth connector is used for a detachable and fixed connection with the inner side of the upper part of the rear end of the left front fender assembly or the inner side of the upper part of the rear end of the right front fender assembly. The fifth connector is used for a detachable and fixed connection to the inner side of the lower rear end of the left front fender assembly or the inner side of the lower rear end of the right front fender assembly.

5. The white body painting fixture for new energy vehicles according to claim 1, characterized in that: It also includes a second support assembly and a third support assembly that are fixedly installed on the support frame; The second support assembly and the third support assembly are respectively disposed on both sides of the third mounting section in the second direction; the second support assembly is used to position and support the front end face of the front cover assembly, and to make the inner side of the front cover assembly positioned and supported on the second support assembly face the third connecting assembly on the third mounting section; The third support component is used to position and support the bottom end face of the rear cover assembly, and to position the inner side of the rear cover assembly, which is positioned and supported on the third support component, toward the fourth connecting component on the third mounting section.

6. The white body painting fixture for new energy vehicles according to claim 5, characterized in that: The third connecting component includes two sixth connecting members arranged sequentially along the first horizontal direction; the fourth connecting component includes two seventh connecting members arranged sequentially along the first horizontal direction. The two sixth connectors are respectively used for detachable fixed connection to the inner side of the left rear end of the front cover assembly and detachable fixed connection to the inner side of the right rear end of the front cover assembly. The two seventh connectors are respectively used for a detachable fixed connection to the inner side of the left side of the top of the rear cover assembly and a detachable fixed connection to the inner side of the right side of the top of the rear cover assembly.

7. The white body painting fixture for new energy vehicles according to claim 1, characterized in that: The fifth connection component includes an eighth connector and a ninth connector; The eighth connector and the ninth connector are respectively used for detachable fixed connection with the left front longitudinal beam of the front compartment assembly and detachable fixed connection with the right front longitudinal beam of the front compartment assembly, or respectively used for detachable fixed connection with the left upper side beam of the front compartment assembly and detachable fixed connection with the right upper side beam of the front compartment assembly, so as to fix the left side or right side of the front compartment assembly to the support frame with the left side facing down or the right side facing down.

8. The white body painting fixture for new energy vehicles according to claim 7, characterized in that: It also includes a fourth support assembly that is fixedly installed on the support frame; The fourth support assembly is used to support the left side of the front bulkhead of the front compartment assembly fixed to the support frame with its left side facing downward, or to support the right side of the front bulkhead of the front compartment assembly fixed to the support frame with its right side facing downward.

9. A method for painting the body-in-white of a new energy vehicle, characterized in that, The white body painting method includes: The welding and assembly processes for the left side panel assembly, right side panel assembly, left front fender assembly, right front fender assembly, left front door assembly, left rear door assembly, right front door assembly, right rear door assembly, hood assembly, rear cover assembly, and front compartment assembly of the body-in-white of the new energy vehicle are performed concurrently. The left front door assembly and the left rear door assembly, which have been welded and assembled, are installed onto the left side panel assembly, which has been welded and assembled, to form a left connecting body. The right front door assembly and the right rear door assembly, which have been welded and assembled, are installed onto the right side panel assembly, which has been welded and assembled, to form a right connecting body. The left connector, the right connector, and the welded and assembled left front fender assembly, right front fender assembly, front cover assembly, rear cover assembly, and front compartment assembly are all detachably and fixedly installed onto the white body painting fixture of the new energy vehicle as described in any one of claims 1-8, which is installed on the painting conveyor line. Start the painting conveyor line to complete the painting process of the body-in-white.

10. A method for assembling the body of a new energy vehicle, characterized in that, The vehicle assembly method includes: performing a painting process for the body-in-white of a new energy vehicle using the body-in-white painting method for new energy vehicles as described in claim 9, to obtain a painted left connector, right connector, left front fender assembly, right front fender assembly, front hood assembly, rear hood assembly, and front compartment assembly; and performing a parallel assembly process for the battery chassis assembly of the new energy vehicle to obtain a fully assembled battery chassis assembly. The painted left connector, right connector, left front fender assembly, right front fender assembly, front cover assembly, rear cover assembly, front compartment assembly, and battery floor assembly, along with the assembled battery chassis assembly, are assembled in a specific order to obtain the vehicle body of the new energy vehicle.

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