Seat linkage rod welding clamp

Abstract

The utility model discloses a seat linkage rod welding clamp which is characterized in that the seat linkage rod welding clamp comprises a clamp base and a clamp bottom plate, the clamp bottom plate is arranged on the top face of the clamp base, the top face of the clamp bottom plate is a plane, and a plurality of clamping stations are arranged on the clamp bottom plate side by side. Each clamping station comprises two supporting positioning blocks, two connecting ring positioning blocks and an end positioning block which are arranged at intervals along a straight line, a pressing device is arranged above the two supporting positioning blocks, the two connecting ring positioning blocks are located on the outer sides of the two supporting positioning blocks, the end positioning block is located on the outer side of one connecting ring positioning block, and the pressing device is located on the outer side of the other connecting ring positioning block. An end pressing block moving in the axial direction of the end positioning block is arranged on the outer side of the other connecting ring positioning block, and connecting ring clamping devices are arranged in the opposite directions of the two connecting ring positioning blocks. The clamp has the beneficial effects that the clamp is simple in structure, workpiece clamping is convenient, the positioning precision is high, automatic welding of a robot is conveniently achieved, workpiece taking is convenient, and the welding quality and the welding machining efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of welding fixtures, specifically to a welding fixture for a seat linkage rod. Background Technology

[0002] As a core load-bearing component of the seat adjustment mechanism, the welding quality of the linkage rod directly affects the motion accuracy and safety performance of the seat assembly. According to industry statistics, 80% of passenger car seat durability failures originate from welding defects in the linkage rod. Current welding processes mostly employ manual positioning with universal fixtures, resulting in positioning errors typically reaching ±0.5mm, which is insufficient to meet the ≤0.2mm geometric tolerance requirements of high-end models. A 2022 quality report from a certain OEM revealed that 67% of its seat assembly welding defects stemmed from linkage rod assembly deviations.

[0003] Existing welding fixtures are complex to clamp and position, have low positioning accuracy, and occupy a large space for clamping mechanisms, which is not conducive to the automation of robotic welding. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this utility model provides a welding fixture for a seat linkage rod, which has a simple structure, is easy to clamp, has high positioning accuracy, and is conducive to improving welding efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A welding fixture for a seat linkage rod, characterized in that it includes a fixture base and a fixture bottom plate, the fixture bottom plate being disposed on the top surface of the fixture base, the top surface of the fixture bottom plate being a plane, and the fixture bottom plate having a plurality of clamping stations arranged in parallel, each clamping station including two support positioning blocks, two connecting ring positioning blocks, and one end positioning block arranged at intervals along a straight line, a clamping device being disposed above the two support positioning blocks, the two connecting ring positioning blocks being located outside the two support positioning blocks, the end positioning block being located outside one of the connecting ring positioning blocks, and an end clamping block being disposed outside the other connecting ring positioning block, which moves in the axial direction of the end positioning block, and connecting ring clamping devices being disposed in opposite directions of the two connecting ring positioning blocks.

[0007] Furthermore, the clamping device includes a support base disposed on the base plate of the clamp, a clamping cylinder mounting base disposed on the upper middle part of the support base, a chain plate seat hinged to the upper part of the support base, a vertically telescopic clamping cylinder mounted on the clamping cylinder mounting base, a T-shaped pressure arm hinged to the front section of the piston rod of the clamping cylinder, the T-shaped pressure arm being hinged to the upper end of the chain plate seat and forming a lever clamping structure, and two pressure blocks disposed on the T-shaped pressure arm facing the two support positioning blocks.

[0008] Furthermore, the connecting ring clamping device includes a cylinder mounting base disposed on the fixture base plate, a horizontally arranged lever pressing cylinder disposed on the cylinder mounting base, and a connecting ring clamping block connected to the pressing arm of the lever pressing cylinder.

[0009] Furthermore, the connecting ring clamping block has a C-shaped pressing part.

[0010] Furthermore, each clamping station of the fixture base plate is equipped with two ejector cylinders. The ejector cylinders are located between the support positioning block and the connecting ring positioning block. The piston rod of the ejector cylinder is connected to a push rod directly below the seat linkage rod.

[0011] Furthermore, a second cylinder mounting seat is provided on the base plate of the fixture, and a guide rod cylinder is arranged laterally on the second cylinder mounting seat. The end clamping block is connected to the front end of the guide rod cylinder.

[0012] The advantages of this utility model include: simple fixture structure, convenient workpiece clamping, high positioning accuracy, convenient realization of automatic robot welding, convenient part removal, and improved welding quality and welding processing efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0015] One such Figure 1The seat linkage welding fixture shown includes a fixture base 1 and a fixture base plate 2. The fixture base plate 1 is located on the top surface of the fixture base 1, and the top surface of the fixture base plate 2 is flat. The fixture base plate 2 has two clamping stations arranged side-by-side. Each clamping station includes two support positioning blocks 3, two connecting ring positioning blocks 4, and one end positioning block 5 arranged at intervals along a straight line. A clamping device is provided above the two support positioning blocks 3 for clamping the linkage. The two support positioning blocks 3 have U-shaped positioning grooves arranged along a straight line. The two connecting ring positioning blocks 4 are located outside the two support positioning blocks 3, with their upper ends forming a Y-shape, and their opposite end faces being flat. An end positioning block 5 is located outside one of the connecting ring positioning blocks 4. An end clamping block 6, which moves axially toward the end positioning block 5, is located outside the other connecting ring positioning block 4. A second cylinder mounting seat 18 is provided on the fixture base plate 2, and a laterally arranged guide rod cylinder 19 is provided on the second cylinder mounting seat 18. The end clamping block 6 is connected to the front end of the guide rod cylinder 19. Connecting ring clamping devices are provided in opposite directions on both connecting ring positioning blocks 4. During clamping, the connecting ring is fitted onto the seat linkage rod, so that one end of the seat linkage rod abuts against the end positioning block 5, and the end clamping block 6 presses against the other end of the seat linkage rod. The connecting ring clamping devices press the connecting ring onto the connecting ring positioning block 4, and welding can then begin.

[0016] The clamping device includes a support base 7 mounted on the fixture base plate 2. A clamping cylinder mounting base 8 is located in the middle of the support base 7. A chain plate seat 9 is hinged to the upper part of the support base 7. A vertically telescopic clamping cylinder 10 is mounted on the clamping cylinder mounting base 8. A T-shaped pressure arm 11 is hinged to the front section of the piston rod of the clamping cylinder 10. The T-shaped pressure arm 11 is hinged to the upper end of the chain plate seat 9 to form a lever clamping structure. Two pressure blocks 12 are provided on the T-shaped pressure arm 11, which are directly opposite the two support positioning blocks 3. The two parts are clamped by a cylinder, saving the installation space of the clamping device.

[0017] The connecting ring clamping device includes a cylinder mounting base 13 mounted on the fixture base plate 2. A horizontally arranged lever clamping cylinder 14 is mounted on the cylinder mounting base 13, and a connecting ring clamping block 15 is connected to the pressure arm of the lever clamping cylinder 14. The connecting ring clamping block 15 has a C-shaped clamping part, which allows the connecting ring to be stably clamped on the connecting ring positioning block 4, preventing the connecting ring from being misaligned with the seat linkage rod.

[0018] Since the seat linkage rod is prone to thermal expansion and deformation after welding, making it inconvenient to remove from the fixture, the fixture base plate 2 in this embodiment is equipped with two ejector cylinders 16 at each clamping station. The ejector cylinder 16 is located between the support positioning block 3 and the connecting ring positioning block 4. The piston rod of the ejector cylinder 16 is connected to the push rod 17 facing the bottom of the seat linkage rod. After welding is completed, the clamping device and the connecting ring clamping device are opened, thereby actuating the ejector cylinder 16 and ejecting the welded seat linkage rod.

[0019] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A seat link rod welding fixture characterized by: The fixture includes a fixture base (1) and a fixture base plate (2). The fixture base plate (2) is located on the top surface of the fixture base (1). The top surface of the fixture base plate (2) is a plane. The fixture base plate (2) has multiple clamping stations arranged in parallel. Each clamping station includes two support positioning blocks (3), two connecting ring positioning blocks (4), and one end positioning block (5) arranged at intervals along a straight line. A clamping device is provided above the two support positioning blocks (3). The two connecting ring positioning blocks (4) are located outside the two support positioning blocks (3). The end positioning block (5) is located outside one of the connecting ring positioning blocks (4). An end clamping block (6) that moves in the axial direction of the end positioning block (5) is provided outside the other connecting ring positioning block (4). A connecting ring clamping device is provided in the opposite direction of the two connecting ring positioning blocks (4).

2. A seat link welding fixture as defined in claim 1 wherein: The clamping device includes a support base (7) set on the clamp base plate (2), a clamping cylinder mounting base (8) is set on the upper middle part of the support base (7), a chain plate seat (9) is hinged on the upper part of the support base (7), a vertically telescopic clamping cylinder (10) is installed on the clamping cylinder mounting base (8), a T-shaped pressure arm (11) is hinged to the front section of the piston rod of the clamping cylinder (10), the T-shaped pressure arm (11) is hinged to the upper end of the chain plate seat (9) and forms a lever clamping structure, and two pressure blocks (12) are set on the T-shaped pressure arm (11) facing the two support positioning blocks (3).

3. A seat link welding fixture as defined in claim 1 wherein: The connecting ring clamping device includes a cylinder mounting seat (13) disposed on the fixture base plate (2), and a lever pressing cylinder (14) arranged laterally is disposed on the cylinder mounting seat (13), and a connecting ring clamping block (15) is connected to the pressing arm of the lever pressing cylinder (14).

4. A seat link welding fixture as defined in claim 3 wherein: The connecting ring clamping block (15) has a C-shaped pressing part.

5. A seat link welding fixture as defined in claim 1 wherein: Each clamping station of the fixture base plate (2) is equipped with two ejector cylinders (16). The ejector cylinders (16) are located between the support positioning block (3) and the connecting ring positioning block (4). The piston rod of the ejector cylinder (16) is connected to a push rod (17) directly below the seat linkage rod.

6. A seat link welding fixture as defined in claim 1 wherein: The fixture base plate (2) is provided with a second cylinder mounting seat (18), and a guide rod cylinder (19) arranged laterally is provided on the second cylinder mounting seat (18). The end clamping block (6) is connected to the front end of the guide rod cylinder (19).

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