Motor mounting bracket and wire harness bracket assembly welding jig

Abstract

This utility model discloses a welding fixture for assembling a motor mounting bracket and a wire harness bracket. The fixture includes a base plate, a positioning plate, a wire harness bracket positioning block, a positioning pin, an anti-misalignment pin, a first magnet, a copper sleeve, and a second magnet. The positioning plate and the wire harness bracket positioning block are fixed to the base plate by bolts and slots. The positioning pin and the anti-misalignment pin are respectively set on the positioning plate and the base plate to achieve precise positioning and error prevention. The first magnet and the second magnet are respectively embedded in the wire harness bracket positioning block and the copper sleeve, automatically attracting and fixing the workpiece through magnetic force. The wire harness bracket positioning block is made of brass material, effectively preventing welding spatter and adhesion. This utility model has the advantages of simple operation, accurate positioning, reliable error prevention, and resistance to welding interference, effectively ensuring welding quality, improving production efficiency, and reducing labor intensity.

Description

Technical Field

[0001] This utility model relates to the field of clamping structures, and in particular to a clamping fixture for assembling and welding a motor mounting bracket and a wire harness bracket. Background Technology

[0002] With the rapid development of the automotive industry, especially new energy electric vehicles, the integration and complexity of automotive rear axle assemblies are increasing. Among these, the motor mounting bracket and wiring harness bracket, as key components on the rear drive axle, play a decisive role in the reliable fixation of the motor and the rational layout and safety protection of the vehicle's wiring harness. To ensure the precision and reliability of the vehicle assembly, these brackets typically need to be integrated with the rear axle housing assembly as a whole through assembly and welding. Therefore, the dimensional accuracy of their position after welding is crucial.

[0003] In existing production technologies, traditional general-purpose fixtures or special tooling are commonly used when assembling and welding motor mounting brackets and wire harness brackets. These existing fixtures typically have the following drawbacks: First, traditional fixtures have a relatively simple positioning method and often lack effective error prevention mechanisms. In actual production, operators may easily install motor mounting brackets with similar structures into the fixture in the wrong direction, leading to batch scrap of welded products. This not only wastes materials but also seriously affects production efficiency and product qualification rate.

[0004] Secondly, existing fixtures often rely on mechanical clamping mechanisms to hold workpieces in place, which is relatively cumbersome to operate and time-consuming to clamp and disassemble, making it unsuitable for the high-efficiency, fast-paced production requirements of modern production lines. Furthermore, mechanical clamping may leave indentations on the workpiece surface, affecting the product's appearance quality.

[0005] Furthermore, welding spatter is inevitably generated during welding operations. If the positioning elements of the fixture are made of ordinary steel, the high-temperature spatter easily adheres to the positioning surface. This adhesion not only contaminates subsequent workpieces but also causes a rapid decline in positioning accuracy, requiring frequent shutdowns for cleaning and maintenance, shortening the fixture's lifespan, and increasing maintenance costs.

[0006] Finally, some existing welding fixtures fail to achieve rapid and accurate collaborative positioning when welding two independent components, the motor mounting bracket and the wiring harness bracket. This makes it difficult to simultaneously guarantee the relative positional accuracy between the two components and their final dimensions when connected to the bridge housing, thus affecting the overall quality stability of the product. Utility Model Content

[0007] The purpose of this utility model is to overcome the defects of the existing technology and provide a motor mounting bracket and wire harness bracket assembly and welding fixture.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A motor mounting bracket and wire harness bracket assembly and welding fixture includes a base plate, a positioning plate, a wire harness bracket positioning block, a positioning pin, an anti-misalignment pin, a first magnet, a copper sleeve, and a second magnet. The positioning plate and the wire harness bracket positioning block are fixed to the base plate by bolts and positioned by slots.

[0009] Furthermore, the second magnet is connected to the copper sleeve by an interference fit, the copper sleeve is connected to the positioning plate by an interference fit, and the positioning pin is connected to the positioning plate by an interference fit.

[0010] Furthermore, the wire harness bracket positioning block is made of brass material, and the wire harness bracket positioning block is provided with a positioning groove. The first magnet is connected to the wire harness bracket positioning block by interference fit.

[0011] Furthermore, the anti-misalignment pin is connected to the base plate via an interference fit.

[0012] Furthermore, the second magnet is used to hold the motor mounting bracket, so that the end face of the motor mounting bracket is in close contact with the end face of the positioning plate.

[0013] Furthermore, the first magnet is used to hold the wire harness bracket, so that the end face of the wire harness bracket is tightly attached to the positioning groove of the wire harness bracket positioning block.

[0014] Furthermore, the anti-misinstallation pin is used to block the edge of the motor mounting bracket when it is installed backwards, thus preventing incorrect installation.

[0015] Furthermore, the method for welding the motor mounting bracket and the wire harness bracket using the assembly and welding fixture includes the following steps: The assembly and welding fixture is fixed to the welding platform; The motor mounting bracket is snapped onto the positioning pin of the positioning plate and fixed by the second magnet; The wire harness bracket is installed in the positioning groove of the wire harness bracket positioning block and fixed by the first magnet, so that one end face of it is in contact with the motor mounting bracket. Weld the contact points between the motor mounting bracket and the wiring harness bracket.

[0016] Furthermore, the process parameters used in the welding steps are: current 150A to 240A, voltage 22V to 28V, and shielding gas flow rate 20L / min to 25L / min.

[0017] Furthermore, after welding is completed, the welded workpiece can be removed as a whole by gently pulling outwards from the edge of the motor mounting bracket.

[0018] The beneficial effects of this utility model are as follows: This application utilizes magnets to automatically attract and fix the workpiece, replacing the traditional mechanical clamping mechanism, making operation extremely simple and quick, significantly reducing clamping and disassembly time, greatly improving production efficiency and reducing the labor intensity of workers. The unique anti-misalignment pin design effectively prevents incorrect installation of the motor mounting bracket through physical interference, avoiding batch welding scrap due to incorrect orientation from the source, ensuring product quality consistency and reducing material waste. Addressing the welding spatter problem, the wire harness bracket positioning block is innovatively made of brass material, whose excellent anti-spatter properties effectively prevent the adhesion of molten metal particles, maintaining the cleanliness and accuracy of the positioning surface for a long time, reducing the frequency of downtime for cleaning and maintenance, thereby extending the service life of the fixture and reducing maintenance costs. In terms of positioning accuracy, the synergistic effect of the positioning plate, positioning pin, slotted positioning block, and magnet ensures that the relative position of the motor mounting bracket and the wire harness bracket is accurate during the welding process, with tight end-face contact, reliably ensuring that the dimensions of the welded assembly meet the drawing requirements, resulting in high product consistency and stability. Furthermore, the overall structure employs a robust connection method combining bolts and slots, offering both excellent rigidity and ease of installation, effectively resisting welding stress and deformation. This invention ultimately achieves the goal of completing high-quality assembly and welding in a single setup, demonstrating significant advantages in error prevention, efficiency, precision, durability, and overall economic benefits, making it particularly suitable for modern mass production lines. Attached Figure Description

[0019] Figure 1 This is a cross-sectional schematic diagram of the fixture in this application.

[0020] Figure 2 This is a top view of the fixture in this application.

[0021] Figure 3 This is a schematic diagram of the structure after the motor mounting bracket and wire harness bracket of this application are assembled. Detailed Implementation

[0022] Reference Figure 1 , Figure 2 The motor mounting bracket and wire harness bracket assembly and welding fixture provided by this utility model consists of a base plate 1, a positioning plate 2, a wire harness bracket positioning block 3, a positioning pin 4, an anti-misalignment pin 5, a first magnet 6, a copper sleeve 7, and a second magnet 8.

[0023] The positioning plate 2 is fixed to the base plate 1 by bolts and slot positioning, and the positioning pin 4 is pressed vertically into the preset hole of the positioning plate 2 by interference fit.

[0024] The copper sleeve 7 is pressed into a specific hole in the positioning plate 2 by interference fit, and the second magnet 8 is embedded in the copper sleeve 7. The copper sleeve 7 plays a role in heat insulation to prevent the second magnet 8 from demagnetizing due to the high temperature of welding.

[0025] The wire harness bracket positioning block 3 is made of brass and machined, with a positioning groove on it that matches the shape of the wire harness bracket 10. Brass is used because of its good thermal conductivity and resistance to welding spatter adhesion, thus maintaining the cleanliness and precision of the positioning groove. The first magnet 6 is embedded into the wire harness bracket positioning block 3 via an interference fit. The entire wire harness bracket positioning block 3 is also securely installed at the designated position on the base plate 1 using bolts and locking slots.

[0026] The anti-misalignment pin 5 is pressed vertically into the calculated position on the base plate 1 through an interference fit. Its height and position do not interfere with the correctly installed motor mounting bracket 9, but it will collide with the incorrectly placed motor mounting bracket 9, thereby achieving physical anti-misalignment.

[0027] The specific usage method of this fixture includes the following steps: Step 1: Fixture Installation. Place the fully assembled welding fixture stably on the welding work platform. Use standard clamping bolts to reliably fix the base plate 1 to the welding platform, ensuring that the fixture will not move or vibrate during the welding process.

[0028] Step 2: Install the motor mounting bracket 9. The operator aligns the mounting holes of the motor mounting bracket 9 with the positioning pins 4 on the positioning plate 2, and then lowers it. When the motor mounting bracket 9 approaches the positioning plate 2, the second magnet 8 embedded in the copper sleeve 7 generates magnetic force, automatically attracting it and ensuring that the end face of the motor mounting bracket 9 fits tightly against the end face of the positioning plate 2, completing the positioning and fixing. At this time, if the operator mistakenly places the motor mounting bracket 9 in the wrong direction, its edge will be blocked by the anti-misalignment pin 5, preventing it from falling onto the end face of the positioning plate 2, thus preventing the positioning pins 4 from being installed, and the system will issue an error warning.

[0029] Step 3: Install the wire harness bracket 10. The operator places the wire harness bracket 10 into the positioning groove of the wire harness bracket positioning block 3. The first magnet 6 embedded in the positioning block will automatically attract the wire harness bracket 10, so that one end face is tightly attached to the reference surface of the positioning groove. Under the action of magnetic force, the other end of the wire harness bracket 10 will simultaneously be tightly attached to the upper end face of the already installed motor mounting bracket 9, forming a correct overlapping relationship, preparing for welding.

[0030] Step 4: Welding. After both workpieces are installed and tightly fitted, the operator or welding robot can perform welding according to the preset welding process. Recommended welding parameters are: current 150-240A, voltage 22-28V, shielding gas flow rate 20-25L / min. The welding point is located in the contact area between the motor mounting bracket 9 and the wiring harness bracket 10. This fixture ensures that the dimensions of the welded assembly are completely consistent with the requirements of the product design drawings.

[0031] Step 5: Remove the workpiece. After welding, the operator only needs to hold one edge of the motor mounting bracket 9 and gently pull it backward to overcome the magnetic attraction, thus smoothly removing the welded motor mounting bracket 9 and wire harness bracket 10 from the fixture. The structural diagram of the workpiece is shown below. Figure 3 As shown.

[0032] This fixture achieves high-speed, zero-error clamping of workpieces through the organic combination of mechanical positioning (positioning pins, positioning slots), magnetic assisted fixing (first and second magnets), and physical error prevention (error prevention pins). By selecting special materials (brass positioning blocks, copper sleeves), it effectively addresses the challenges of the welding environment, ultimately ensuring the stability and high precision of product welding quality and greatly improving production efficiency.

[0033] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. A jig for assembling and welding a motor mounting bracket and a wire harness bracket, comprising a base plate, a positioning plate, a wire harness bracket positioning block, a positioning pin, an anti-misalignment pin, a first magnet, a copper sleeve, and a second magnet, characterized in that, The positioning plate and the wire harness bracket positioning block are fixed to the base plate by bolts and slots. The second magnet is connected to the copper sleeve by an interference fit, the copper sleeve is connected to the positioning plate by an interference fit, and the positioning pin is connected to the positioning plate by an interference fit. The wire harness bracket positioning block is made of brass material and has a positioning groove. The first magnet is connected to the wire harness bracket positioning block by interference fit. The anti-misalignment pin is connected to the base plate by an interference fit.

2. The motor mounting bracket and wire harness bracket assembly and welding fixture according to claim 1, characterized in that, The second magnet is used to hold the motor mounting bracket, so that the end face of the motor mounting bracket is in close contact with the end face of the positioning plate.

3. The motor mounting bracket and wire harness bracket assembly and welding fixture according to claim 1, characterized in that, The first magnet is used to hold the wire harness bracket, so that the end face of the wire harness bracket is tightly attached to the positioning groove of the wire harness bracket positioning block.

4. The motor mounting bracket and wire harness bracket assembly and welding fixture according to claim 1, characterized in that, The anti-misinstallation pin is used to block the edge of the motor mounting bracket when it is installed backwards, thus preventing incorrect installation.

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