Movable positioning pin auxiliary frame and vehicle body assembling device

Abstract

The utility model discloses a movable type positioning pin auxiliary frame and vehicle body assembling device which comprises a vehicle body longitudinal beam assembly (4), an auxiliary frame assembly (1) is installed on the vehicle body longitudinal beam assembly (4), a movable positioning pin (2) is arranged on the auxiliary frame assembly (1), the end portion of the movable positioning pin (2) is connected to the vehicle body longitudinal beam assembly (4) in an inserted mode, and the movable positioning pin (2) is arranged on the vehicle body longitudinal beam assembly (4). The auxiliary frame assembly (1) is divided into an auxiliary frame upper plate (101) and an auxiliary frame lower plate (102), the cross section of the auxiliary frame upper plate (101) and the cross section of the auxiliary frame lower plate (102) are in an L shape, and the auxiliary frame upper plate (101) and the auxiliary frame lower plate (102) are combined together to form a rectangle. According to the mechanism, the positioning precision of the combination of the auxiliary frame assembly (1) and the automobile body can be effectively guaranteed through the movable positioning pin (2), meanwhile, the abnormal friction noise of the movable positioning pin (2) and an automobile body metal plate in the later period is avoided, and the movable positioning pin (2) can be detached in the combination process and is convenient to use repeatedly.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle technology. Specifically, this utility model relates to a movable positioning pin subframe and body assembly device. Background Technology

[0002] There are generally four ways to install and position a car subframe to the body: ① Precise positioning of the subframe and tooling, followed by precise positioning of the tooling to the body, then tightening the mounting bolts. After installation, the tooling is removed. ② Welding locating pins onto the subframe, with locating holes designed on the body. During installation, the locating pins are aligned with the locating holes, and then the mounting bolts are tightened. ③ Designing one small hole and one strip hole at the subframe mounting point, with the rest being larger holes. During installation, the holes are aligned, and the bolts are self-positioned and tightened. ④ Designing one small hole and one strip hole at the subframe mounting point, with the rest being larger holes. Welding locating studs to the body. During installation, the studs are aligned with the mounting holes, and the nuts are tightened.

[0003] A specification published on June 7, 2024, with application number 202410212381.3, discloses an adjustable positioning method for the assembly of a load-bearing vehicle body structure and a subframe. This invention adds an adjustable positioning pin mechanism to the front area of ​​the subframe and places the subframe within two sets of positioning fixtures with fixed relative positions: a subframe positioning fixture and a body positioning fixture. The adjustable positioning pin is pre-adjusted and tightened relative to the subframe welding positioning datum and the body main positioning datum, achieving iterative positioning of the positioning pin relative position. The pre-adjusted subframe with adjustable positioning pins is placed in a flexible production line, and assembly positioning is achieved by matching the adjustable positioning pins with the body longitudinal beams. The iteratively positioned adjustable positioning pins, located in the front area of ​​the subframe, reduce the height relative to conventional positioning pins and shorten the longitudinal distance to the body main positioning datum, reducing assembly positioning accuracy issues caused by positioning pin and workpiece position tolerances. It also avoids the impact of springback deformation of the welding positioning pins and body welded components on positioning accuracy, while reducing the space occupation risk of the positioning pins on the body clamps.

[0004] In the existing technology, regarding the four methods mentioned above, method ① involves a long design and development cycle for tooling, which is expensive. Furthermore, during vehicle after-sales maintenance, the lack of tooling necessitates disassembly and reassembly, leading to positioning deviations. Regarding method ②, to ensure accurate installation positioning, the diameter of the locating pin is typically 0.1-0.2mm smaller than the diameter of the body locating hole. Under torsional conditions, asynchronous deformation of the body sheet metal and subframe can cause friction noise between the locating pin and the body sheet metal. Regarding method ③, the bolt self-positioning requires hole-to-hole alignment during assembly, which is inconvenient for workers and usually requires multiple adjustments to achieve alignment. Regarding method ④, the body-welded studs require high precision in position and perpendicularity, which is difficult to guarantee with the body itself. Moreover, the risk of deformation from impacts during the transport of the body-in-white is very high. Utility Model Content

[0005] The present invention aims to provide a simple structure that ensures installation accuracy and does not produce abnormal noise, a movable positioning pin subframe and body assembly device.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a movable positioning pin subframe and body assembly device, comprising a subframe assembly and a body longitudinal beam assembly, wherein the subframe assembly is mounted on the body longitudinal beam assembly, and the subframe assembly is provided with a movable positioning pin that penetrates the subframe assembly, the end of which is inserted into the body longitudinal beam assembly; the subframe assembly is divided into a subframe upper plate and a subframe lower plate, the cross-section of the subframe upper plate and the subframe lower plate is L-shaped, and the subframe upper plate and the subframe lower plate are combined to form a rectangle, and the movable positioning pin penetrates the subframe upper plate and the subframe lower plate.

[0007] The top of the subframe upper plate is provided with a subframe welding nut, and the surface of the movable positioning pin is provided with threads. The movable positioning pin is threadedly connected to the subframe welding nut.

[0008] The end of the movable positioning pin extends from the lower plate of the subframe toward the upper plate of the subframe.

[0009] The subframe assembly is provided with subframe mounting bolts that pass through the subframe assembly and the body longitudinal beam assembly.

[0010] The subframe assembly is provided with a subframe rear mounting point sleeve that runs through the subframe assembly, and the subframe rear mounting point sleeve is fitted onto the outside of the subframe mounting bolt.

[0011] The vehicle body longitudinal beam assembly is provided with a subframe mounting nut seat that mates with the subframe mounting bolts.

[0012] The vehicle body longitudinal beam assembly is provided with a subframe mounting seat, and the subframe mounting seat is provided with a subframe mounting partition, which is convex in shape.

[0013] The technical advantages of this invention are as follows: This mechanism can effectively ensure the positioning accuracy of the subframe assembly and the body through the movable positioning pin, while also solving the problem of friction noise between the movable positioning pin and the body sheet metal in the later stage. In addition, the movable positioning pin can be removed during the assembly process, which is convenient for multiple uses. Attached Figure Description

[0014] This manual includes the following figures, which illustrate the following:

[0015] Figure 1 This is a structural schematic diagram of a movable positioning pin subframe and body assembly device according to the present invention;

[0016] Figure 2 for Figure 1 An exploded view of the structure of a movable positioning pin subframe and body assembly device.

[0017] The markings in the diagram are as follows: 1. Subframe assembly; 101. Subframe upper plate; 102. Subframe lower plate; 103. Subframe rear mounting point sleeve; 104. Subframe welding nut; 2. Movable locating pin; 3. Subframe mounting bolt; 4. Body longitudinal beam assembly; 401. Subframe mounting nut seat; 402. Subframe mounting seat partition; 403. Subframe mounting seat. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the utility model concept and technical solution, and to facilitate its implementation.

[0019] Please see Figure 1-2 A movable positioning pin subframe and body assembly device includes a subframe assembly 1 and a body longitudinal beam assembly 4. The subframe assembly 1 is mounted on the body longitudinal beam assembly 4. The subframe assembly 1 is provided with a movable positioning pin 2 that passes through the subframe assembly 1. The end of the movable positioning pin 2 is inserted into the body longitudinal beam assembly 4. The subframe assembly 1 is divided into a subframe upper plate 101 and a subframe lower plate 102. The cross-sections of the subframe upper plate 101 and the subframe lower plate 102 are L-shaped. The subframe upper plate 101 and the subframe lower plate 102 are combined to form a rectangle. The movable positioning pin 2 passes through the subframe upper plate 101 and the subframe lower plate 102.

[0020] This mechanism effectively ensures the positioning accuracy of the subframe assembly 1 and the body when assembled using the movable positioning pin 2. It also solves the problem of friction noise between the movable positioning pin 2 and the body sheet metal later on. Furthermore, the movable positioning pin 2 can be removed during assembly for convenient reuse. The L-shaped upper subframe plate 101 and lower subframe plate 102 are combined to form a rectangular subframe assembly 1. The movable positioning pin 2 fixes the upper subframe plate 101 and lower subframe plate 102. The short end of the upper subframe plate 101 fits against the long end of the lower subframe plate 102, and the long end of the lower subframe plate 102 bends downwards. The short end of the upper subframe plate 101 fits against the downward-facing recess of the long end of the lower subframe plate 102, allowing the upper and lower subframe plates 101 to rotate relative to each other when they are fitted together. Simultaneously, the movable positioning pin 2 prevents the upper and lower subframe plates 101 from shifting or misaligning.

[0021] The top of the subframe upper plate 101 is provided with a subframe welding nut 104, and the surface of the movable positioning pin 2 is provided with threads. The movable positioning pin 2 is threadedly connected to the subframe welding nut 104. This facilitates the installation of the movable positioning pin 2. After assembly, the movable positioning pin 2 can also be removed for easy reuse.

[0022] The end of the movable positioning pin 2 is positioned from the lower subframe plate 102 toward the upper subframe plate 101; it positions the subframe assembly 1 from bottom to top from the bottom of the body longitudinal beam assembly 4, facilitating operation.

[0023] The subframe assembly 1 is provided with a subframe mounting bolt 3 that passes through the subframe assembly 1 and the body longitudinal beam assembly 4; the subframe assembly 1 is fixed to the body longitudinal beam assembly 4 by the subframe mounting bolt 3.

[0024] The subframe assembly 1 is provided with a subframe rear mounting point sleeve 103 that runs through the subframe assembly 1. The subframe rear mounting point sleeve 103 is fitted onto the outside of the subframe mounting bolt 3; the subframe rear mounting point sleeve 103 is used to protect the subframe mounting bolt 3.

[0025] The body longitudinal beam assembly 4 is provided with a subframe mounting nut seat 401 that mates with the subframe mounting bolt 3; the subframe assembly 1 is fixed to the body longitudinal beam assembly 4 by the subframe mounting nut seat 401 and the subframe mounting bolt 3.

[0026] The body longitudinal beam assembly 4 is provided with a subframe mounting seat 403, and the subframe mounting seat 403 is provided with a subframe mounting partition 402. The subframe mounting partition 402 is convex in shape. The subframe mounting partition 402 is located outside the subframe mounting nut seat 401. The subframe mounting partition 402 can protect the subframe mounting nut seat 401. The subframe mounting bolt 3 is installed on the subframe mounting seat 403.

[0027] The technical effects of this utility model are as follows: This mechanism can effectively ensure the positioning accuracy of the subframe assembly 1 and the body through the movable positioning pin 2, while also solving the problem of friction noise between the movable positioning pin 2 and the body sheet metal in the later stage. Moreover, the movable positioning pin 2 can be removed during the assembly process, which is convenient for multiple uses.

[0028] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A mobile locating pin sub-frame and body assembly device, characterized in that: The application relates to a vehicle frame assembly, which comprises a sub-frame assembly (1) and a vehicle body longitudinal beam assembly (4), wherein the sub-frame assembly (1) is mounted on the vehicle body longitudinal beam assembly (4), the sub-frame assembly (1) is provided with a movable positioning pin (2) penetrating the sub-frame assembly (1), and the end of the movable positioning pin (2) is inserted into the vehicle body longitudinal beam assembly (4); the sub-frame assembly (1) is divided into a sub-frame upper plate (101) and a sub-frame lower plate (102), the cross section of the sub-frame upper plate (101) and the sub-frame lower plate (102) is L-shaped, the sub-frame upper plate (101) and the sub-frame lower plate (102) are combined into a rectangle, and the movable positioning pin (2) penetrates the sub-frame upper plate (101) and the sub-frame lower plate (102).

2. The mobile locating pin sub-frame and body assembling device according to claim 1, characterized in that: The top of the sub-frame upper plate (101) is provided with a sub-frame welding nut (104), the surface of the movable positioning pin (2) is provided with a thread, and the movable positioning pin (2) is in threaded connection with the sub-frame welding nut (104).

3. The mobile locating pin sub-frame and body assembling device according to claim 1 or 2, characterized in that: The end of the movable positioning pin (2) is directed from the sub-frame lower plate (102) to the sub-frame upper plate (101).

4. The mobile locating pin subframe and body assembly device of claim 1, wherein: The sub-frame assembly (1) is provided with a sub-frame mounting bolt (3) penetrating the sub-frame assembly (1) and the vehicle body longitudinal beam assembly (4).

5. The mobile locating pin subframe and body assembly device of claim 4, wherein: The sub-frame assembly (1) is provided with a sub-frame rear mounting point sleeve (103) penetrating the sub-frame assembly (1), and the sub-frame rear mounting point sleeve (103) is sleeved outside the sub-frame mounting bolt (3).

6. A mobile locating pin sub-frame and body assembly device according to claim 4, characterized in that: The vehicle body longitudinal beam assembly (4) is provided with a sub-frame mounting nut seat (401) matched with the sub-frame mounting bolt (3).

7. The mobile locating pin sub-frame and body assembling device according to claim 1 or 4, characterized in that: The vehicle body longitudinal beam assembly (4) is provided with a sub-frame mounting seat (403), the sub-frame mounting seat (403) is provided with a sub-frame mounting partition plate (402), and the sub-frame mounting partition plate (402) is in the shape of a Chinese character 'Ku'.

Images