Four-way leg support welding tool
The positioning structure and clamping components of the four-way leg support welding fixture enable rapid and accurate positioning and multi-angle clamping of the welding fixture, solving the problems of complex installation and limited functionality of traditional welding fixtures, and improving welding efficiency and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-03-06
AI Technical Summary
Traditional welding fixtures are complex to install and position, time-consuming, prone to deviation, and have limited functionality, making it difficult to meet the complex structural welding requirements of the leg support core assembly.
The four-way leg support welding fixture includes a positioning structure, a first clamping assembly, and a second clamping assembly. It utilizes a quick-switching bracket and a positioning bracket to achieve rapid and accurate positioning. The cylinder drives the clamping seat for multi-angle clamping and fixation. It is equipped with a photoelectric control switch to adjust the clamping force and position.
It improved the installation efficiency and accuracy of welding fixtures, ensured welding quality, adapted to the complex structural requirements of the leg support core mechanism assembly, and enhanced welding efficiency and precision.
Smart Images

Figure CN223971140U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of seat manufacturing technology, and in particular to a four-way leg rest welding fixture. Background Technology
[0002] In existing seating applications, the leg rest is a crucial component for enhancing seat comfort, and its manufacturing precision and quality directly impact the user experience. The core mechanism assembly of the leg rest is a key component, and its welding quality determines the structural strength and stability of the leg rest. Currently, traditional welding fixtures have numerous drawbacks in the welding process of the core mechanism assembly of the leg rest.
[0003] When traditional welding fixtures are installed on the platform to be installed, they often require complex adjustments and multiple positioning operations, which consumes a lot of time and effort, resulting in low installation efficiency and easy installation deviations, affecting the accuracy of subsequent welding operations.
[0004] In addition, the existing welding fixtures are relatively simple in function and lack effective clamping and fixing means for components of different heights and positions, which makes it inconvenient to meet the welding requirements of the complex structure of the leg support core mechanism assembly.
[0005] To address the aforementioned issues, this utility model document proposes a four-way leg support welding fixture. Utility Model Content
[0006] The purpose of this utility model is to solve the shortcomings of existing technologies, such as the complexity of traditional welding fixtures in installation and positioning, long installation time and easy deviation, and their single function, which makes it difficult to meet the complex structural welding requirements of the core mechanism assembly of the leg support. Therefore, a four-way leg support welding fixture is proposed.
[0007] To achieve the above objectives, the present invention adopts the following technical solution:
[0008] The four-way leg support welding fixture includes:
[0009] The mounting plate has four support legs fixedly installed at its bottom to support and place the mounting plate.
[0010] It also includes a positioning structure, which includes a quick-change bracket and a positioning bracket disposed at the bottom of the mounting plate. The positioning structure is used to ensure accurate connection and positioning between the mounting plate and the platform to be installed.
[0011] It also includes a first clamping assembly for securing a component at one end of the leg support core mechanism assembly;
[0012] It also includes a second clamping assembly for securing a component at the other end of the leg support core assembly.
[0013] In one possible design, the bottom of the quick-change bracket is provided with a limiting groove, and the bottom of the positioning bracket is provided with a positioning hole. The positioning hole cooperates with the limiting groove to ensure that the mounting plate can be quickly installed and positioned with the platform to be installed.
[0014] In one possible design, the first clamping assembly includes a first cylinder, a second cylinder, a third cylinder, and a fourth cylinder fixedly mounted on the top of the mounting plate. One end of the piston rod of the first cylinder is fixedly connected to a first movable seat, which is slidably connected to the top of the mounting plate. A first clamping seat is fixedly mounted on the top of the first movable seat, and a fixed seat is fixedly mounted on the top of the mounting plate. The first clamping seat cooperates with the fixed seat to clamp and fix the component to be assembled into the leg support core mechanism assembly. One end of the piston rod of the second cylinder is fixedly mounted with a second clamping seat, one end of the piston rod of the third cylinder is fixedly mounted with a third clamping seat, and one end of the piston rod of the fourth cylinder is fixedly mounted with a fourth clamping seat. The second clamping seat cooperates with the fourth cylinder and the fourth clamping seat to clamp and fix another component to be assembled.
[0015] In one possible design, the second clamping assembly includes a low fixing mechanism and a high fixing mechanism. The low fixing mechanism consists of multiple sets of first clamping mechanisms and corresponding multiple first abutment brackets. Each of the multiple first abutment brackets is fixedly connected to the top of the mounting plate. Each first clamping mechanism consists of a fifth cylinder, a support frame, and a pressing rod. The fifth cylinder is fixedly connected to the top of the mounting plate via a bracket. One end of the output shaft of the fifth cylinder is rotatably connected to one end of the pressing rod. The support frame is fixedly connected to the top of the fifth cylinder and rotatably connected to the outer wall of the pressing rod via a connector. The pressing rod engages with the top of the corresponding first abutment bracket. The high fixing mechanism includes a second abutment bracket and two second clamping mechanisms. The second abutment bracket is fixedly installed on the top of the mounting plate. The two second clamping mechanisms are located on both sides of the second abutment bracket and cooperate with it. The high fixing mechanism also includes two sets of third abutment brackets and third clamping mechanisms, and two sets of fourth abutment brackets and fourth clamping mechanisms. The two third abutment brackets and two fourth abutment brackets are fixedly connected to the top of the mounting plate. The two third abutment brackets are located between the two fourth abutment brackets. The two third clamping mechanisms cooperate with the corresponding third abutment brackets, and the two fourth clamping mechanisms cooperate with the corresponding fourth abutment brackets. The second clamping mechanism, the third clamping mechanism, and the fourth clamping mechanism have the same structure as the first clamping mechanism.
[0016] In one possible design, four fixed frames are fixedly installed on the bottom of the mounting plate. The multiple fixed frames are arranged in pairs and are located near the sides of the mounting plate. The multiple fixed frames are used to facilitate the installation of additional components and to facilitate the handling and movement of the mounting plate.
[0017] In one possible design, a photoelectric control switch is fixedly mounted on the top of the mounting plate, and the photoelectric control switch is used to control the equipment.
[0018] In this application, when installing the four-way leg support welding fixture onto the platform to be installed, the four support legs at the bottom of the mounting plate can first be used to stably place the mounting plate in a suitable position. At this time, the operator can align the positioning holes with the corresponding limit protrusions on the mounting platform, and then rotate the welding fixture until the limit slide engages with the corresponding limit block on the mounting platform. This design enables rapid installation and precise positioning of the mounting plate and the platform to be installed, greatly improving installation efficiency while ensuring installation accuracy, providing a stable foundation for subsequent welding operations.
[0019] Subsequently, the operator can use the first and second clamping assemblies to sequentially clamp and fix the various components of the leg support core mechanism assembly in suitable positions. When the first clamping assembly is in use, the first cylinder is activated, its piston rod extends, pushing the first movable seat to move. The first movable seat moves the top first clamping seat closer to the fixed seat until the first clamping seat and the fixed seat cooperate, firmly clamping the component to be assembled into the leg support core mechanism assembly. Simultaneously, the second, third, and fourth cylinders are also activated as needed. The second cylinder moves the second clamping seat; the fourth cylinder moves the fourth clamping seat. The second and fourth clamping seats cooperate to clamp and fix another component to be assembled.
[0020] The second clamping assembly includes a low fixing mechanism and a high fixing mechanism. The low fixing mechanism consists of multiple sets of first clamping mechanisms and corresponding multiple first abutment brackets. When the fifth cylinder is activated, its output shaft can push one end of the pressing rod to start moving. At this time, the other end of the pressing rod moves downward and can cooperate with the top of the corresponding first abutment bracket to press and fix the corresponding component to be assembled into the leg support core mechanism assembly. The multiple sets of first clamping mechanisms work simultaneously to ensure stable clamping of multiple components. The high fixing mechanism works in a similar way to the low fixing mechanism. The two second clamping mechanisms can cooperate with the top of the second abutment bracket through their corresponding pressing rods to fix the corresponding components. At the same time, the two sets of third clamping mechanisms and the two sets of fourth clamping mechanisms can also move synchronously to fix the corresponding components. Furthermore, the movement directions of the two sets of third clamping mechanisms and the two sets of fourth clamping mechanisms are perpendicular to each other, which can ensure good clamping of the components in both the horizontal and vertical planes.
[0021] After placing and fixing all the components of the leg support core mechanism assembly, the operator can control the movement of each cylinder through the photoelectric control switch, adjust the clamping force and position, and ensure that the leg support core mechanism assembly is in the optimal welding position. Then, the various components on the welding fixture can be welded to complete the welding assembly of the leg support core mechanism assembly.
[0022] Beneficial effects: In this utility model, the four-way leg support welding fixture is equipped with a positioning structure, including a quick-switching bracket and a positioning bracket. The quick-switching bracket has a limiting groove at its bottom, and the positioning bracket has a positioning hole at its bottom. When installing onto the platform to be installed, the operator only needs to align the positioning hole with the corresponding limiting protrusion on the installation platform, and then rotate the fixture to make the limiting groove engage with the corresponding limiting block on the installation platform, thereby realizing the quick installation and precise positioning of the mounting plate and the platform to be installed. This design greatly improves the installation efficiency while ensuring the accuracy of the installation, providing a stable foundation for subsequent welding operations.
[0023] In this invention, the four-way leg support welding fixture has a first clamping assembly and a second clamping assembly that can flexibly clamp and fix multiple components that make up the core mechanism assembly of the leg support. The second clamping assembly includes a low fixing mechanism and a high fixing mechanism. Multiple clamping mechanisms can ensure stable clamping of the corresponding components, effectively preventing component displacement during welding and improving welding quality. At the same time, the low fixing mechanism and the high fixing mechanism of the second clamping assembly can clamp and fix components at different heights and positions, which can adapt to the welding requirements of the complex structure of the core mechanism assembly of the leg support.
[0024] In this invention, the four-way leg support welding fixture has a photoelectric control switch fixedly installed on the top of the mounting plate. The operator can control the action of each cylinder and adjust the clamping force and position through the photoelectric control switch to ensure that the core mechanism assembly of the leg support is in the optimal welding position. This design makes the operation more convenient and faster, and improves the efficiency and accuracy of the welding operation.
[0025] In this utility model, the four-way leg support welding fixture is equipped with a positioning structure. The limiting groove of the quick-switching bracket cooperates with the positioning hole of the positioning bracket to quickly and accurately position the mounting plate, thereby improving the installation efficiency and accuracy of the welding fixture. The first and second clamping components can flexibly clamp the core mechanism assembly of the leg support. The low and high fixing mechanisms of the second clamping component can stably clamp components of different heights and positions, effectively preventing component displacement during welding and improving welding quality. It can adapt to the welding needs of the complex structure of the core mechanism assembly of the leg support. The overall design significantly optimizes the performance of the welding fixture. Attached Figure Description
[0026] Figure 1This is a three-dimensional structural schematic diagram of the four-way leg support welding fixture proposed in this utility model;
[0027] Figure 2 This is a schematic diagram of the bottom structure of the mounting plate of the four-way leg support welding fixture proposed in this utility model;
[0028] Figure 3 This is a schematic diagram of the core mechanism assembly of the four-way leg support welding fixture proposed in this utility model.
[0029] Figure 4 This is a schematic diagram of the first clamping component of the four-way leg support welding fixture proposed in this utility model.
[0030] Figure 5 This is a schematic diagram of the second clamping component of the four-way leg support welding fixture proposed in this utility model;
[0031] Figure 6 This is a schematic diagram of the second clamping mechanism of the four-way leg support welding fixture proposed in this utility model;
[0032] Figure 7 This is a schematic diagram of the third and fourth clamping mechanisms of the four-way leg support welding fixture proposed in this utility model.
[0033] In the diagram: 1. Mounting plate; 2. Photoelectric control switch; 3. Support leg; 4. Quick switching bracket; 5. Limiting slide groove; 6. Positioning bracket; 7. Positioning hole; 8. Leg support core mechanism assembly; 9. First cylinder; 10. First moving seat; 11. First clamping seat; 12. Fixed seat; 13. Second cylinder; 14. Second clamping seat; 15. Third cylinder; 16. Third clamping seat; 17. Fourth cylinder; 18. Fourth clamping seat; 19. First clamping mechanism; 20. Fifth cylinder; 21. Support frame; 22. Pressing rod; 23. First abutment bracket; 24. Second abutment bracket; 25. Second clamping mechanism; 26. Third abutment bracket; 27. Third clamping mechanism; 28. Fourth abutment bracket; 29. Fourth clamping mechanism. Detailed Implementation
[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0035] Example 1: Refer to Figure 1-7 A welding fixture, comprising:
[0036] Mounting plate 1, with four support legs 3 fixedly installed at the bottom for supporting and placing the mounting plate 1.
[0037] In this embodiment, a positioning structure is also included. The positioning structure includes a quick-switching bracket 4 and a positioning bracket 6 disposed at the bottom of the mounting plate 1. The positioning structure is used to ensure accurate connection and positioning between the mounting plate 1 and the platform to be installed.
[0038] Furthermore, in this embodiment, the bottom of the quick-switching bracket 4 is provided with a limiting groove 5, and the bottom of the positioning bracket 6 is provided with a positioning hole 7. The positioning hole 7 cooperates with the limiting groove 5 to ensure that the mounting plate 1 can be quickly installed and positioned with the platform to be installed. Specifically, during installation, the positioning hole 7 of the positioning bracket 6 is aligned with the corresponding limiting protrusion on the platform to be installed, and then the limiting groove 5 cooperates with the limiting block and other structures on the platform to be installed to achieve quick and accurate installation and positioning.
[0039] In this embodiment, a first clamping assembly is also included, which is used to fix the component at one end of the leg support core mechanism assembly 8.
[0040] The first clamping assembly includes a first cylinder 9, a second cylinder 13, a third cylinder 15, and a fourth cylinder 17, all fixedly mounted on the top of the mounting plate 1. A first movable seat 10 is fixedly connected to one end of the piston rod of the first cylinder 9. The first movable seat 10 is slidably connected to the top of the mounting plate 1. A first clamping seat 11 is fixedly mounted on the top of the first movable seat 10. A fixed seat 12 is fixedly mounted on the top of the mounting plate 1. The first clamping seat 11 cooperates with the fixed seat 12 to clamp and fix the component to be assembled into the leg support core mechanism assembly 8. A second clamping seat 14 is fixedly mounted to one end of the piston rod of the second cylinder 13. A third clamping seat 16 is fixedly mounted to one end of the piston rod of the third cylinder 15. A fourth clamping seat 18 is fixedly mounted to one end of the piston rod of the fourth cylinder 17. The second clamping seat 14 cooperates with the fourth cylinder 17 and the fourth clamping seat 18 to clamp and fix another component to be assembled.
[0041] In this embodiment, the first moving seat 10 is moved by the first cylinder 9, which in turn moves the first clamping seat 11, cooperating with the fixed seat 12 to clamp and fix the component. Simultaneously, the second cylinder 13, the third cylinder 15, and the fourth cylinder 17 respectively drive the second clamping seat 14, the third clamping seat 16, and the fourth clamping seat 18 to move, thereby clamping and fixing another component. This arrangement ensures stable and accurate clamping of the components assembling the leg support core mechanism assembly 8, facilitating subsequent welding operations.
[0042] In this embodiment, a second clamping assembly is also included, which is used to fix the component at the other end of the leg support core mechanism assembly 8.
[0043] The second clamping assembly includes a low fixing mechanism and a high fixing mechanism. The low fixing mechanism consists of multiple sets of first clamping mechanisms 19 and corresponding multiple first abutment brackets 23, all of which are fixedly connected to the top of the mounting plate 1. The first clamping mechanism 19 consists of a fifth cylinder 20, a support frame 21, and a pressing rod 22. The fifth cylinder 20 is fixedly connected to the top of the mounting plate 1 via a bracket. One end of the output shaft of the fifth cylinder 20 is rotatably connected to one end of the pressing rod 22. The support frame 21 is fixedly connected to the top of the fifth cylinder 20 and is rotatably connected to the outer wall of the pressing rod 22 via a connector. The pressing rod 22 cooperates with the top of the corresponding first abutment bracket 23.
[0044] The high-fixing mechanism includes a second abutment bracket 24 and two second clamping mechanisms 25. The second abutment bracket 24 is fixedly installed on the top of the mounting plate 1, and the two second clamping mechanisms 25 are located on both sides of the second abutment bracket 24, and both cooperate with the second abutment bracket 24. The high-fixing mechanism also includes two sets of third abutment brackets 26 and third clamping mechanisms 27, and two sets of fourth abutment brackets 28 and fourth clamping mechanisms 29. The two third abutment brackets 26 and the two fourth abutment brackets 28 are all fixedly connected to the top of the mounting plate 1. The two third abutment brackets 26 are located between the two fourth abutment brackets 28. The two third clamping mechanisms 27 cooperate with the corresponding third abutment bracket 26, and the two fourth clamping mechanisms 29 cooperate with the corresponding fourth abutment bracket 28.
[0045] Furthermore, the second clamping mechanism 25, the third clamping mechanism 27 and the fourth clamping mechanism 29 have the same structure as the first clamping mechanism 19, and the length and shape of the multiple pressing rods 22 can be changed accordingly according to actual needs.
[0046] In this embodiment, the low fixing mechanism and the high fixing mechanism are used to clamp and fix different parts of the leg support core mechanism assembly 8. The corresponding pressing rod 22 is driven by a cylinder to rotate using a lever principle, which cooperates with the corresponding abutment bracket to achieve clamping and fixing of the components. This arrangement ensures comprehensive and stable clamping of the components of the leg support core mechanism assembly 8, improving the accuracy and efficiency of welding.
[0047] This application can be used in the field of seat manufacturing technology, or in other fields applicable to this application.
[0048] Example 2: Reference Figure 1 , 2 An improvement based on Example 1: a four-way leg support welding fixture, which is applied to the field of seat manufacturing technology;
[0049] In this embodiment, four fixed frames are fixedly installed on the bottom of the mounting plate 1. These fixed frames are arranged in pairs and located near the sides of the mounting plate 1. The multiple fixed frames facilitate the installation of additional components and also allow for easy handling and movement of the mounting plate 1. By setting up the fixed frames, additional components or equipment can be easily installed to meet different welding requirements. Simultaneously, the fixed frames also serve as handles for handling and moving the mounting plate 1, facilitating operation by the operator.
[0050] In this embodiment, a photoelectric control switch 2 is fixedly installed on the top of the mounting plate 1. The photoelectric control switch 2 is used to control the equipment. By setting the photoelectric control switch 2, automated control of the equipment can be easily achieved. Operators can use the photoelectric control switch 2 to start, stop, or adjust the operating status of the equipment, improving the ease of operation and automation of the equipment.
[0051] However, as is well known to those skilled in the art, the working principle and wiring method of the photoelectric control switch 2 and the multiple cylinders are commonplace and are all conventional means or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.
[0052] The working principle and usage process of this technical solution are as follows: When installing the four-way leg support welding fixture onto the platform to be installed, the four support legs 3 at the bottom of the mounting plate 1 can be used to stably place the mounting plate 1 in a suitable position. At this time, the operator can align the positioning hole 7 with the corresponding limiting protrusion on the mounting platform, and then rotate the welding fixture until the limiting groove 5 engages with the corresponding limiting block on the mounting platform. This design enables the rapid installation and precise positioning of the mounting plate 1 and the platform to be installed, greatly improving installation efficiency while ensuring installation accuracy, providing a stable foundation for subsequent welding operations.
[0053] Subsequently, the operator can use the first and second clamping components to sequentially clamp and fix the various components of the leg support core mechanism assembly 8 in suitable positions. When the first clamping component is in use, the first cylinder 9 is activated, its piston rod extends, pushing the first movable seat 10 to move. The first movable seat 10 drives the top first clamping seat 11 towards the fixed seat 12 until the first clamping seat 11 and the fixed seat 12 cooperate to firmly clamp the component to be assembled into the leg support core mechanism assembly 8. Simultaneously, the second cylinder 13, the third cylinder 15, and the fourth cylinder 17 are also activated as needed. The second cylinder 13 can drive the second clamping seat 14 to move; the fourth cylinder 17 can drive the fourth clamping seat 18 to move. The second clamping seat 14 and the fourth clamping seat 18 cooperate to clamp and fix another component to be assembled.
[0054] The second clamping assembly includes a low fixing mechanism and a high fixing mechanism. The low fixing mechanism consists of multiple sets of first clamping mechanisms 19 and corresponding multiple first abutment brackets 23. When the fifth cylinder 20 is activated, its output shaft can push one end of the pressing rod 22 to start moving. At this time, the other end of the pressing rod 22 moves downward and can cooperate with the top of the corresponding first abutment bracket 23 to press and fix the corresponding parts of the leg support core mechanism assembly 8. The multiple sets of first clamping mechanisms 19 work simultaneously to ensure stable clamping of multiple parts. The high fixing mechanism works in a similar way to the low fixing mechanism. The two second clamping mechanisms 25 can cooperate with the top of the second abutment bracket 24 through their corresponding pressing rods 22 to fix the corresponding parts. At the same time, the two sets of third clamping mechanisms 27 and the two sets of fourth clamping mechanisms 29 can also move synchronously to fix the corresponding parts. Furthermore, the movement directions of the two sets of third clamping mechanisms 27 and the two sets of fourth clamping mechanisms 29 are perpendicular to each other, which can ensure good clamping of the parts in both the horizontal and vertical planes.
[0055] After the placement and fixing of each component of the leg support core mechanism assembly 8 are completed, the operator can control the action of each cylinder through the photoelectric control switch 2, adjust the clamping force and position, and ensure that the leg support core mechanism assembly 8 is in the optimal welding position. Then, the components on the welding fixture can be welded to complete the welding assembly of the leg support core mechanism assembly 8.
[0056] The accompanying drawings in the application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.
[0057] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A four-way leg rest welding fixture, characterized in that, The utility model relates to a kind of leg support core mechanism assembly and its installation device, including: Mounting plate (1), the bottom of mounting plate (1) is fixedly installed four support legs (3), for completing the support placement of mounting plate (1); It further includes positioning structure, the positioning structure includes the quick switching support (4) and positioning support (6) being arranged at the bottom of mounting plate (1), and the positioning structure is used to ensure the accurate connection and limit of mounting plate (1) with the platform to be installed; It further includes first clamping assembly, and the first clamping assembly is used to fix the component of one end of leg support core mechanism assembly (8); It further includes second clamping assembly, and the second clamping assembly is used to fix the component of other end of leg support core mechanism assembly (8).
2. The four-way leg rest welding fixture of claim 1, wherein, The bottom of the quick switching support (4) is provided with a limiting sliding slot (5), the bottom of the positioning support (6) is provided with a positioning hole (7), the positioning hole (7) is matched with limiting sliding slot (5), for ensuring that mounting plate (1) can be quickly installed and positioned with the platform to be installed.
3. The four-way leg rest welding fixture of claim 1, wherein, The first clamping assembly includes first cylinder (9), second cylinder (13), third cylinder (15) and fourth cylinder (17) fixedly installed on the top of mounting plate (1), the piston rod one end of first cylinder (9) is fixedly connected with first moving seat (10), the top of first moving seat (10) is slidably connected with the top of mounting plate (1), the top of first moving seat (10) is fixedly installed with first clamping seat (11), the top of mounting plate (1) is fixedly installed with fixed seat (12), first clamping seat (11) is matched with fixed seat (12), to complete the clamping fixation of the component to be assembled as leg support core mechanism assembly (8);The piston rod one end of second cylinder (13) is fixedly installed with second clamping seat (14), the piston rod one end of third cylinder (15) is fixedly installed with third clamping seat (16), the piston rod one end of fourth cylinder (17) is fixedly installed with fourth clamping seat (18), second clamping seat (14) is matched with fourth cylinder (17), fourth clamping seat (18), for clamping fixation to another component to be assembled.
4. The four-way leg rest welding fixture of claim 3, wherein, The second clamping assembly comprises low fixing mechanism and high fixing mechanism, the low fixing mechanism is composed of multiple first clamping mechanisms (19) and corresponding multiple first abutting supports (23), multiple first abutting supports (23) are fixedly connected with the top of the mounting plate (1), the first clamping mechanism (19) is composed of the fifth cylinder (20), the support frame (21) and the pressing rod (22), the fifth cylinder (20) is fixedly connected with the top of the mounting plate (1) through the support, one end of the output shaft of the fifth cylinder (20) is rotatably connected with one end of the pressing rod (22), the support frame (21) is fixedly connected with the top of the fifth cylinder (20), the support frame (21) is rotatably connected with the outer wall of the pressing rod (22) through the connecting piece, and the pressing rod (22) is matched with the top of the corresponding first abutting support (23); the high fixing mechanism comprises a second abutting support (24) and two second clamping mechanisms (25), the second abutting support (24) is fixedly installed on the top of the mounting plate (1), two second clamping mechanisms (25) are located on the two sides of the second abutting support (24), and they are matched with the second abutting support (24), the high fixing mechanism further comprises two third abutting supports (26), third clamping mechanisms (27) and two fourth abutting supports (28), fourth clamping mechanisms (29), two third abutting supports (26) and two fourth abutting supports (28) are fixedly connected with the top of the mounting plate (1), two third abutting supports (26) are located between two fourth abutting supports (28), two third clamping mechanisms (27) are matched with the corresponding third abutting support (26), and two fourth clamping mechanisms (29) are matched with the corresponding fourth abutting support (28); the second clamping mechanism (25), the third clamping mechanism (27) and the fourth clamping mechanism (29) are same as the structure of the first clamping mechanism (19).
5. The four-way leg rest welding fixture of claim 1, wherein, The bottom of the mounting plate (1) is fixedly installed with four fixed frames, multiple fixed frames are two groups and are located at positions close to the two sides of the mounting plate (1) respectively, and multiple fixed frames are used for conveniently installing additional components and can also facilitate the carrying and moving of the mounting plate (1).
6. The four-way leg rest welding fixture of claim 1, wherein, The top of the mounting plate (1) is fixedly installed with a photoelectric control switch (2), and the photoelectric control switch (2) is used for completing the control of the equipment.