A subframe assembly welding fixture

Abstract

This utility model discloses a welding fixture for a subframe assembly, including an operating table with a placement platform containing the fixture body inside. A threaded rod and a first guide rod are connected to the bottom of the placement platform. The lower end of the threaded rod meshes with a second helical gear on a rotating rod via a first helical gear. The rotating rod is connected to a crank handle. Pressing mechanisms are provided on both sides of the operating table, including a mounting plate, an L-shaped plate, a limiting bolt, and a pressure plate. The mounting plate is fixed by a fixing plate and a support plate, and is equipped with an electric telescopic rod and a second guide rod. By rotating the crank handle, the threaded rod drives the placement platform to rise and fall via gear transmission, adapting to different height requirements. In the pressing mechanism, the electric telescopic rod moves the L-shaped plate, and rotating the limiting bolt causes the pressure plate to press the workpiece. This structure achieves height adjustment and stable pressing, adapting to various subframes, improving operational convenience and welding accuracy, and reducing costs.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a welding fixture for a subframe assembly. Background Technology

[0002] In the welding production of automotive subframe assemblies, traditional welding fixtures have many limitations. First, most fixtures are fixed structures, and their height and clamping position cannot be adjusted. They can only be adapted to a single model of subframe. When producing products of different specifications, the entire set of fixtures needs to be replaced, which not only increases the cost of equipment purchase but also occupies a lot of storage space. Moreover, the changeover process is time-consuming, which seriously affects production efficiency.

[0003] Secondly, the height adjustment of traditional fixtures mostly relies on manual lifting or the placement of shims, which is labor-intensive and difficult to guarantee accuracy. Fixing the workpiece requires manual handling and alignment of the clamping components, which is not only labor-intensive but also prone to workpiece displacement during welding due to uneven clamping force, causing quality problems such as weld misalignment and deformation, affecting product consistency. In addition, some fixtures have weak support structures and transmission components are prone to wear. After long-term high-frequency use, they are prone to malfunctions such as shaking and jamming, resulting in high maintenance frequency, which further increases production costs and makes it difficult to meet the needs of modern production lines for efficient, stable and flexible production. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of these documents, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] Therefore, the purpose of this utility model is to provide a welding fixture for the subframe assembly, which can solve the problems of existing model compatibility limitations and cumbersome and laborious operation.

[0006] To solve the above technical problems, this utility model provides a subframe assembly welding fixture, which adopts the following technical solution: it includes an operating table, the inside of which is provided with a groove, and a placement platform is slidably connected inside the groove. The upper end of the placement platform is fixedly connected to the fixture body by a fixing bolt. A threaded rod is threadedly connected to the center of the bottom of the placement platform, and a first helical gear is fixedly connected to the lower end of the threaded rod. A fixing block is fixedly connected to the lower end of the operating table near the left side, and a rotating rod is rotatably connected to the inner wall of the fixing block. Pressing mechanisms are provided on both sides of the operating table.

[0007] The pressing mechanism includes a mounting plate, an L-shaped plate, a limit bolt, and a pressure plate.

[0008] Optionally, a first guide rod is fixedly connected to the lower end of the placement platform. The outer surface of the first guide rod is slidably connected to the operating platform. There are two first guide rods, which are symmetrically distributed on both sides of the threaded rod.

[0009] The above technical solution involves setting symmetrical first guide rods on both sides of the threaded rod to limit the lifting trajectory of the placement platform and prevent it from shifting or shaking due to the rotation of the threaded rod.

[0010] Optionally, the lower end of the operating table is fixedly connected with four support legs, which are evenly distributed at the four corners of the lower end of the operating table.

[0011] The above technical solution provides a stable load-bearing foundation for the entire fixture by supporting the operating platform with four evenly distributed outriggers, thus preventing the operating platform from tilting or shaking during welding operations or component movement.

[0012] Optionally, a second helical gear is fixedly connected to the right side of the rotating rod, and the outer surface of the second helical gear meshes with the first helical gear.

[0013] The above technical solution converts the horizontal rotational motion of the rotating rod into the vertical rotational motion of the threaded rod through the meshing of the second helical gear and the first helical gear, thereby realizing power transmission. This is the key transmission structure for adjusting the lifting of the placement platform.

[0014] Optionally, a hanging ring is rotatably connected to the outer surface of the rotating rod, the upper end of the hanging ring is fixedly connected to the lower surface of the operating table, there are two hanging rings and they are horizontally distributed, and a crank handle is fixedly connected to the left side of the rotating rod.

[0015] Through the above technical solution, the hanging ring provides auxiliary support for the rotating rod, preventing it from bending or shifting due to uneven force at both ends, and ensuring smooth rotation.

[0016] Optionally, a fixing plate is fixedly connected to both the left and right sides of the operating table, and a support plate is fixedly connected to the upper end of the fixing plate. The upper end of the support plate is fixedly connected to the mounting plate.

[0017] The above technical solution connects and fixes the mounting plate to the operating table using a fixing plate and a support plate, providing a stable mounting carrier for the pressing mechanism.

[0018] Optionally, an electric telescopic rod is fixedly connected to the front end of the mounting plate, the front end of the electric telescopic rod is fixedly connected to the L-shaped plate, and a second guide rod is fixedly connected to the rear end of the L-shaped plate. The outer surface of the second guide rod is slidably connected to the mounting plate, and there are two second guide rods symmetrically distributed on both sides of the electric telescopic rod.

[0019] The above technical solution provides the electric telescopic rod with the power to move the L-shaped plate horizontally, enabling rapid adjustment of the pressing position.

[0020] Optionally, the inner wall of the L-shaped plate is threadedly connected to the limiting bolt, and the lower end of the limiting bolt is rotatably connected to the pressure plate.

[0021] Through the above technical solution, the threaded connection between the limiting bolt and the L-shaped plate, combined with the rotational connection between the bolt and the pressure plate, converts the rotational movement of the bolt into the vertical lifting movement of the pressure plate, thereby achieving precise clamping or loosening of the workpiece.

[0022] In summary, this utility model has at least one of the following beneficial effects:

[0023] 1. With its height-adjustable placement platform design, combined with a crank-driven threaded rod and helical gear transmission structure, the height of the fixture body can be flexibly adjusted, easily adapting to subframe assemblies of different specifications and thicknesses. This eliminates the need to customize fixtures for each model, significantly reducing equipment investment costs.

[0024] 2. The first guide rods on both sides of the placement platform and the second guide rod at the rear end of the L-shaped plate respectively limit the offset during lifting and horizontal movement. Together with the pressure plate, they rigidly press the workpiece, effectively avoiding workpiece displacement caused by vibration or force during welding, reducing welding deformation, misalignment and other problems, and improving weld quality and product consistency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the pressure plate telescopic structure of this utility model;

[0029] Figure 4 This is a schematic diagram of the fixture body of this utility model.

[0030] Explanation of reference numerals in the attached drawings: 1. Operating platform; 2. Support leg; 3. Fixing plate; 4. Support plate; 5. Mounting plate; 6. Groove; 7. Fixture body; 8. Threaded rod; 9. First guide rod; 10. First helical gear; 11. Second helical gear; 12. Handle; 13. Second guide rod; 14. Rotating rod; 15. Hanging ring; 16. Fixing block; 17. Fixing bolt; 18. Placement platform; 19. Limiting bolt; 20. L-shaped plate; 21. Pressure plate; 22. Electric telescopic rod. Detailed Implementation

[0031] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0032] Reference Figure 1-4 This utility model provides a subframe assembly welding fixture, which includes an operating table 1. The operating table 1 has a groove 6 inside, and a placement platform 18 is slidably connected inside the groove 6. The upper end of the placement platform 18 is fixedly connected to the fixture body 7 by a fixing bolt 17. A threaded rod 8 is threadedly connected to the center of the bottom of the placement platform 18. A first helical gear 10 is fixedly connected to the lower end of the threaded rod 8. A fixing block 16 is fixedly connected to the lower end of the operating table 1 near the left side. A rotating rod 14 is rotatably connected to the inner wall of the fixing block 16. Pressing mechanisms are provided on both sides of the operating table 1.

[0033] A first guide rod 9 is fixedly connected to the lower end of the placement platform 18. The outer surface of the first guide rod 9 is slidably connected to the operating platform 1. There are two first guide rods 9, which are symmetrically distributed on both sides of the threaded rod 8. A support leg 2 is fixedly connected to the lower end of the operating platform 1. There are four support legs 2, which are evenly distributed at the four corners of the lower end of the operating platform 1. A second helical gear 11 is fixedly connected to the right side of the rotating rod 14. The outer surface of the second helical gear 11 is meshed with the first helical gear 10. A hanging ring 15 is rotatably connected to the outer surface of the rotating rod 14. The upper end of the hanging ring 15 is fixedly connected to the lower surface of the operating platform 1. There are two hanging rings 15, which are horizontally distributed. A crank handle 12 is fixedly connected to the left side of the rotating rod 14.

[0034] The pressing mechanism includes a mounting plate 5, an L-shaped plate 20, a limiting bolt 19, and a pressure plate 21. A fixing plate 3 is fixedly connected to both the left and right sides of the operating table 1. A support plate 4 is fixedly connected to the upper end of the fixing plate 3. The upper end of the support plate 4 is fixedly connected to the mounting plate 5. An electric telescopic rod 22 is fixedly connected to the front end of the mounting plate 5. The front end of the electric telescopic rod 22 is fixedly connected to the L-shaped plate 20. A second guide rod 13 is fixedly connected to the rear end of the L-shaped plate 20. The outer surface of the second guide rod 13 is slidably connected to the mounting plate 5. There are two second guide rods 13, symmetrically distributed on both sides of the electric telescopic rod 22. The inner wall of the L-shaped plate 20 is threadedly connected to the limiting bolt 19. The lower end of the limiting bolt 19 is rotatably connected to the pressure plate 21.

[0035] Working principle: The fixture uses the operating table 1 as its support base, and is stably supported by four support legs 2 at the bottom. The groove 6 inside the operating table 1 provides sliding space for the placement platform 18. The fixture body 7 is fixed to the upper end of the placement platform 18 by fixing bolts 17 to adapt to the shape of the subframe assembly and achieve initial positioning. When adjusting the height, the crank handle 12 on the left side is turned to drive the rotating rod 14 to rotate. The second helical gear 11 on the right side of the rotating rod 14 meshes with the first helical gear 10 at the bottom of the placement platform 18, converting the horizontal rotational motion into vertical power. The first helical gear 10 drives the threaded rod 8 to rotate. Since the threaded rod 8 is threaded to the center of the bottom of the placement platform 18, and the two sides of the placement platform 18 are slidably limited by the first guide rod 9 and the operating table 1, the rotation of the threaded rod 8 will drive the placement platform 18 to rise and fall vertically along the groove 6 until the appropriate welding height is adjusted.

[0036] During the pressing and fixing process, the mounting plate 5 is fixed on both sides of the operating table 1 via the fixing plate 3 and the support plate 4, serving as the support frame for the pressing mechanism. When the electric telescopic rod 22 at the front end of the mounting plate 5 extends or retracts, it drives the L-shaped plate 20 to move horizontally, so that the pressure plate 21 is aligned with the position to be pressed on the sub-frame. By rotating the limiting bolt 19 on the L-shaped plate 20, since the limiting bolt 19 is threadedly connected to the inner wall of the L-shaped plate 20, and the lower end of the limiting bolt 19 is rotatably connected to the pressure plate 21, the rotation of the limiting bolt 19 will drive the pressure plate 21 to descend vertically until it is tightly pressed on the surface of the sub-frame, achieving a firm fixation during welding and preventing the workpiece from shifting.

[0037] After fixing, welding is carried out. After welding is completed, the operation is reversed to release the pressure plate 21 and lower the placement table 18 to remove the workpiece. Through the combination of height adjustment and bidirectional pressing and fixing, different specifications of subframes can be adapted by changing the fixture, and the stability of the workpiece during the welding process is ensured, thereby improving welding accuracy and efficiency.

[0038] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A subframe assembly welding jig comprising an operation table (1), characterized in that: The operating table (1) has a groove (6) inside, and a placement platform (18) is slidably connected inside the groove (6). The upper end of the placement platform (18) is fixedly connected to the fixture body (7) by a fixing bolt (17). A threaded rod (8) is threadedly connected to the center of the bottom of the placement platform (18). A first helical gear (10) is fixedly connected to the lower end of the threaded rod (8). A fixing block (16) is fixedly connected to the lower end of the operating table (1) near the left side. A rotating rod (14) is rotatably connected to the inner wall of the fixing block (16). Pressing mechanisms are provided on both sides of the operating table (1). The pressing mechanism includes a mounting plate (5), an L-shaped plate (20), a limiting bolt (19), and a pressure plate (21).

2. The subframe assembly welding fixture of claim 1, wherein: The lower end of the placement platform (18) is fixedly connected to a first guide rod (9). The outer surface of the first guide rod (9) is slidably connected to the operating table (1). There are two first guide rods (9) and they are symmetrically distributed on both sides of the threaded rod (8).

3. The subframe assembly welding fixture of claim 1, wherein: The lower end of the operating table (1) is fixedly connected to a support leg (2), and the support leg (2) is four in number and evenly distributed at the four corners of the lower end of the operating table (1).

4. The subframe assembly welding fixture of claim 1, wherein: The right side of the rotating rod (14) is fixedly connected to a second helical gear (11), and the outer surface of the second helical gear (11) meshes with the first helical gear (10).

5. The subframe assembly welding fixture of claim 1, wherein: The outer surface of the rotating rod (14) is rotatably connected to a hanging ring (15). The upper end of the hanging ring (15) is fixedly connected to the lower surface of the operating table (1). There are two hanging rings (15) and they are horizontally distributed. A crank handle (12) is fixedly connected to the left side of the rotating rod (14).

6. The subframe assembly welding fixture of claim 1, wherein: The left and right sides of the operating table (1) are fixedly connected to a fixing plate (3), and the upper end of the fixing plate (3) is fixedly connected to a support plate (4). The upper end of the support plate (4) is fixedly connected to the mounting plate (5).

7. The subframe assembly welding fixture of claim 1, wherein: The front end of the mounting plate (5) is fixedly connected to an electric telescopic rod (22), the front end of the electric telescopic rod (22) is fixedly connected to an L-shaped plate (20), the rear end of the L-shaped plate (20) is fixedly connected to a second guide rod (13), the outer surface of the second guide rod (13) is slidably connected to the mounting plate (5), and there are two second guide rods (13) symmetrically distributed on both sides of the electric telescopic rod (22).

8. The subframe assembly welding fixture of claim 1, wherein: The inner wall of the L-shaped plate (20) is threadedly connected to the limiting bolt (19), and the lower end of the limiting bolt (19) is rotatably connected to the pressure plate (21).

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