A welding fixture for car seat adjusters

Abstract

This utility model discloses a welding fixture for an automotive seat adjuster. The main body of the welding fixture has matching snap-fit ​​holes corresponding to the protrusions on the core components of the adjuster. Two core components of the adjuster are respectively arranged on the left and right sides of the welding fixture main body, with each protrusion snapping into its corresponding snap-fit ​​hole. The main body of the welding fixture has a positioning hole corresponding to the center hole of the core components of the adjuster. The size of the positioning hole is consistent with the outer diameter of a concentric shaft. The concentric shaft passes through the center holes of the two core components of the adjuster and the positioning hole of the welding fixture main body, thereby fixing the two core components of the adjuster. The main body of the welding fixture has locking holes corresponding to the bracket holes on the adjuster bracket. Each locking hole is equipped with a bolt. The bolt passes through the bracket holes of the two adjuster brackets and the locking hole of the welding fixture main body, and is locked with a nut, thereby limiting and fixing the two adjuster brackets. This utility model achieves precision welding of the core components of the adjuster and the adjuster bracket in the adjuster and its mirror image.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat technology, and in particular to a welding fixture for an automotive seat adjuster. Background Technology

[0002] As a key component of car seats, the seat adjuster's main function is to adjust the seat back angle to meet the comfort needs of different passengers. The performance and precision of the adjuster play a crucial role in the overall design and user experience of car seats. Especially in the early stages of car seat development, extremely high requirements are placed on the welding precision of the core components of the adjuster (including the adjuster itself and its mirror component). The accuracy of the welding angle directly affects the subsequent assembly quality of the seat and its final performance. Deviations in the welding angle can lead to seat misalignment after assembly, such as the seat back being higher on the left than the right, or vice versa, or the left or right side shifting forward after adjustment, severely impacting passenger comfort and safety.

[0003] Currently, traditional welding methods for automotive seat adjusters (where the core component is welded to the adjuster bracket) have many drawbacks. Traditional welding relies on workers using rulers to measure dimensions based on 3D data, marking the measurements, and then manually welding. This method is prone to significant deviations. Firstly, the measurement process itself is susceptible to human and environmental factors. Workers using rulers may encounter inaccuracies due to tool inaccuracies, improper techniques, or reading errors. Secondly, the position of the core adjuster component may fluctuate during welding, causing deviations between the weld point and the marked position. This is especially problematic when welding two mirror-image components; significant deviations in opposite directions can be amplified during seat assembly, resulting in noticeable seat tilt and failing to meet the stringent angle accuracy requirements of automotive seats. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model aims to provide a low-cost, high-precision, and easy-to-use welding fixture for automotive seat adjusters, so as to achieve precise welding of the core component of the adjuster and the adjuster bracket in the adjuster and its mirror component.

[0005] To achieve the above objectives, this utility model proposes a welding fixture for automotive seat adjusters, comprising a concentric shaft and a mirror-arranged adjuster and a mirror-image adjuster component. Both the adjuster and the mirror-image adjuster component include a core adjuster component to be welded together and an adjuster bracket. The core adjuster component has a central hole, and around the central hole are multiple protrusions arranged in a ring, with varying intervals between adjacent protrusions. The adjuster bracket is fitted over the core adjuster component and has at least two bracket holes. The fixture also includes a welding fixture body. The welding fixture body has matching snap-fit ​​holes corresponding to the protrusions on the core adjuster component. The two core adjuster components are respectively arranged on the left and right sides of the welding fixture body. Each protrusion on the welding fixture is inserted into the corresponding locking hole from the corresponding side. The welding fixture body is also provided with a positioning hole corresponding to the center hole of the core component of the angle adjuster. The size of the positioning hole is the same as the outer diameter of the concentric shaft. The concentric shaft passes through the center hole of the core component of the angle adjuster, the positioning hole of the welding fixture body, and the center hole of the other core component of the angle adjuster in sequence, thereby realizing the limiting and fixing of the two core components of the angle adjuster. The welding fixture body is provided with locking holes corresponding to the bracket holes on the angle adjuster bracket. Each locking hole is equipped with a bolt. The bolt passes through the bracket hole of the angle adjuster bracket, the locking hole of the welding fixture body, and the corresponding bracket hole of the other angle adjuster bracket in sequence, and is locked with a nut, thereby realizing the limiting and fixing of the two angle adjuster brackets.

[0006] In the above solution: the angle adjuster bracket has two bracket holes spaced apart. The upper part of the angle adjuster bracket is fitted onto the core component of the angle adjuster, and the lower part has locking holes corresponding to the two bracket holes, which are distributed at an oblique interval. The two bracket holes are the original mounting holes on the angle adjuster bracket, through which the angle adjuster bracket is used to fix with other components.

[0007] In the above solution: the concentric shaft is provided with an anti-rotation inclined surface, the central hole is a hole that matches the cross-section of the concentric shaft, and the positioning hole is a circular hole structure that allows the concentric shaft to pass through. The concentric shaft is a synchronizer rod inherent in car seats, used to connect two adjusters, and the central hole is also a built-in hole on the core component of a universal adjuster. This structure achieves positioning by utilizing existing components, and is simple in structure and ingenious in design.

[0008] In the above scheme: the core component of the angle adjuster is provided with six protrusions arranged in a ring. Based on the protrusions on the core component of the angle adjuster, the main body of the welding fixture is provided with six corresponding snap-fit ​​holes. The six snap-fit ​​holes are arranged in an irregular array. When the protrusions and snap-fit ​​holes are connected, any misalignment of any hole will prevent proper assembly.

[0009] In the above scheme: the main body of the welding fixture is a vertically arranged rectangular plate structure, which is simple in structure and easy to process.

[0010] In the above scheme: the main body of the welding fixture is made of 45 steel, which is a medium carbon steel with high strength and hardness, as well as a certain degree of toughness.

[0011] The beneficial effects of this utility model are:

[0012] By utilizing the unique matching of the protrusions and locking holes, along with the positioning effect of the concentric shaft, the fluctuation of the angle adjuster core component is effectively limited. This ensures the precise relative position of the two angle adjuster core components before welding, avoiding angular deviations caused by measurement errors and manual operation in traditional welding methods, thus laying the foundation for subsequent precise welding. The angle adjuster bracket is fitted onto the angle adjuster core component. The welding fixture body has locking holes corresponding to the bracket holes of the angle adjuster bracket. Bolts are passed sequentially through the bracket holes, locking holes, and the corresponding bracket holes of the other angle adjuster bracket, and then locked with nuts. This connection method effectively limits and fixes the two angle adjuster brackets, ensuring the relative positional accuracy between the angle adjuster brackets and the angle adjuster core component. This further ensures the structural stability of the entire angle adjuster assembly during welding, effectively preventing welding angle deviations caused by angle adjuster bracket displacement during welding, and ensuring the precise relative positional height of the two angle adjuster brackets. In summary, this fixture ensures the relative positional accuracy of the angle adjuster core component and the angle adjuster bracket during welding, reducing the risk of dimensional deviations after welding. Meanwhile, the symmetry of the adjuster and its mirror component is ensured, which can effectively improve the smoothness, stability and service life of car seat angle adjustment. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the core component of the angle adjuster and the angle adjuster bracket.

[0014] Figure 2 This is a schematic diagram of the concentric shaft structure.

[0015] Figure 3 yes Figure 2 A schematic diagram of the end face.

[0016] Figure 4 This is a structural schematic diagram of the main body of the welding fixture.

[0017] Figure 5 This is a rear view of the main body of the welding fixture. Detailed Implementation

[0018] like Figure 1 As shown in Figure 5, a welding fixture for an automotive seat adjuster mainly consists of a concentric shaft 1, a welding fixture body 6, and a mirror-arranged adjuster and a mirror image of the adjuster.

[0019] Both the angle adjuster and its mirror image include an angle adjuster core component 2 to be welded together and an angle adjuster bracket 3. The angle adjuster core component 2 has a central hole 4, and around the central hole 4 are multiple protrusions arranged in a ring. The spacing between adjacent protrusions is different, and the protrusions are all located on the side of the two angle adjuster core components 2 that are close to each other. The angle adjuster bracket 3 is fitted onto the angle adjuster core component 2 and has at least two bracket holes 5.

[0020] The welding fixture body 6 has matching snap-fit ​​holes 7 on each protrusion corresponding to the core component 2 of the angle adjuster. The two core components 2 of the angle adjuster are respectively arranged on the left and right sides of the welding fixture body 6, and each protrusion on them is snapped into the snap-fit ​​holes 7 from the corresponding side. The welding fixture body 6 also has a positioning hole 8 corresponding to the center hole 4 of the core component 2 of the angle adjuster. The size of the positioning hole 8 is the same as the outer diameter of the concentric shaft 1. The concentric shaft 1 passes through the center hole 4 of the core component 2 of the angle adjuster, the positioning hole 8 of the welding fixture body 6, and the center hole 4 of the other core component 2 of the angle adjuster in sequence, thereby realizing the limiting and fixing of the two core components 2 of the angle adjuster.

[0021] Each bracket hole 5 on the welding fixture body 6 corresponding to the angle adjuster bracket 3 is provided with a locking hole 9. Each locking hole 9 is equipped with a bolt 10. The bolt 10 passes through the bracket hole 5 of the angle adjuster bracket 3, the locking hole 9 of the welding fixture body 6 and the corresponding bracket hole 5 of the other angle adjuster bracket 3 in sequence, and is locked with a nut, thereby realizing the limiting and fixing of the two angle adjuster brackets 3.

[0022] Ideally, the angle adjuster bracket 3 has two bracket holes 5 spaced apart. The upper part of the angle adjuster bracket 3 is fitted onto the angle adjuster core component 2, and the lower part has locking holes 9 corresponding to the two bracket holes 5, with the two locking holes 9 distributed at an angle. The two bracket holes 5 are the original mounting holes on the angle adjuster bracket 3, through which the angle adjuster bracket 3 is used to fix with other components.

[0023] Ideally, the concentric shaft 1 has an anti-rotation ramp, the center hole 4 is a hole that matches the cross-section of the concentric shaft 1, and the positioning hole 8 is a circular hole structure that allows the concentric shaft 1 to pass through. The concentric shaft 1 is a synchronizer rod that is already present on the car seat and is used to connect the two adjusters. The center hole 4 is also a hole that is built into the core component of the universal adjuster. This structure achieves the positioning function by utilizing existing components, and the structure is simple and ingeniously designed.

[0024] Ideally, the core component 2 of the angle adjuster has six protrusions arranged in a ring. Based on the protrusions on the core component 2 of the angle adjuster, the main body 6 of the welding fixture has six corresponding snap-fit ​​holes 7. The six snap-fit ​​holes 7 are arranged in an irregular array. When the protrusions and snap-fit ​​holes 7 are mated, any misalignment of any hole will prevent proper assembly.

[0025] Ideally, the main body of the welding fixture 6 should be a vertically arranged rectangular plate structure, which is simple in structure and easy to process.

[0026] Ideally, the main body of the welding fixture 6 should be made of 45 steel, which is a medium carbon steel with high strength and hardness, as well as a certain degree of toughness.

Claims

1. A welding fixture for an automotive seat adjuster, comprising a concentric shaft (1) and a mirror-arranged adjuster and a mirror-image adjuster component, wherein the adjuster and the mirror-image adjuster component each include an adjuster core component (2) to be welded together and an adjuster bracket (3), wherein the adjuster core component (2) is provided with a central hole (4), and a plurality of protrusions arranged in a ring around the central hole (4) are provided, with different spacing between adjacent protrusions, and the adjuster bracket (3) is fitted onto the adjuster core component (2), wherein at least two bracket holes (5) are provided thereon, characterized in that: It also includes a welding fixture body (6), on which each protrusion on the core component (2) of the angle adjuster is provided with a matching snap-fit ​​hole (7). The two core components (2) of the angle adjuster are respectively arranged on the left and right sides of the welding fixture body (6), and each protrusion on them is snapped into the snap-fit ​​hole (7) one by one from the corresponding side. The welding fixture body (6) is also provided with a positioning hole (8) corresponding to the center hole (4) of the core component (2) of the angle adjuster. The size of the positioning hole (8) is consistent with the outer diameter of the concentric shaft (1). The concentric shaft (1) passes through the center hole (4) of the core component (2) of the angle adjuster and the welding fixture in sequence. The positioning hole (8) of the main body (6) and the center hole (4) of the other angle adjuster core component (2) are used to limit and fix the two angle adjuster core components (2); the welding fixture main body (6) is provided with locking holes (9) for each bracket hole (5) on the angle adjuster bracket (3), and each locking hole (9) is equipped with a bolt (10). The bolt (10) passes through the bracket hole (5) of the angle adjuster bracket (3), the locking hole (9) of the welding fixture main body (6) and the corresponding bracket hole (5) of the other angle adjuster bracket (3) in sequence, and is locked by a nut, thereby realizing the limit and fixation of the two angle adjuster brackets (3).

2. The welding fixture for the automotive seat adjuster according to claim 1, characterized in that: The angle adjuster bracket (3) is provided with two bracket holes (5) spaced apart. The upper part of the angle adjuster bracket (3) is sleeved on the core component (2) of the angle adjuster, and the lower part is provided with locking holes (9) corresponding to the two bracket holes (5). The two locking holes (9) are distributed obliquely at intervals.

3. The welding fixture for the automotive seat adjuster according to claim 1, characterized in that: The concentric shaft (1) is provided with an anti-rotation inclined surface, the central hole (4) is a hole that matches the cross section of the concentric shaft (1), and the positioning hole (8) is a circular hole structure that allows the concentric shaft (1) to pass through.

4. The welding fixture for the automotive seat adjuster according to claim 1, characterized in that: The core component (2) of the angle adjuster is provided with six protrusions arranged in a ring.

5. The welding fixture for the automotive seat adjuster according to claim 1, characterized in that: The main body of the welding fixture (6) is a vertically arranged rectangular plate structure.

6. The welding fixture for an automotive seat adjuster according to claim 5, characterized in that: The main body (6) of the welding fixture is made of 45 steel.

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