A welding fixture for leg support frame

Abstract

This utility model belongs to the field of seat manufacturing technology, and in particular, it is a welding fixture for leg support frames. Addressing the problems of cumbersome operation, low efficiency in component placement, high cost and frequent errors in manual adjustments, which affect welding quality and progress, existing traditional welding fixtures are proposed as follows: a first welding fixture and a second welding fixture are provided. The first welding fixture is responsible for the assembly welding of the leg support frame sub-assemblies; the second welding fixture is used to complete the assembly welding of the leg support frame assembly, the extension transmission bracket assembly, and the leg support cover plate spot welding assembly. In this utility model, the welding fixture includes the first and second welding fixtures, which are respectively used for the assembly welding of different assemblies. Simultaneously, through the rational design of the fixing components, pressing and abutting mechanisms, various welding requirements can be met. The coordinated work of each component ensures accurate welding position, avoids errors caused by manual adjustment, and improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of seat manufacturing technology, and in particular to a welding fixture for a leg support frame. Background Technology

[0002] In the automotive seat manufacturing industry, the welding quality of the leg support frame sub-assembly and the leg support frame assembly plays a crucial role in the comfort and safety of the seat. However, traditional welding fixtures have revealed many technical defects in the actual application of leg support frame manufacturing, making it difficult to meet the high precision and high efficiency requirements of leg support frame manufacturing.

[0003] During the welding process of the leg support frame, multiple components need to be precisely assembled to ensure that the welded assembly meets the design requirements. However, the operation of traditional welding fixtures is complicated and the efficiency of placing components is low. To ensure the precise placement of multiple components, operators need to spend a lot of time and energy adjusting the position and fixing method of the components, which not only increases labor costs but also reduces production efficiency. Moreover, due to the cumbersome operation process, human error is prone to occur, which will further affect the welding quality and production progress.

[0004] To address the aforementioned problems, this utility model document proposes a welding fixture for a leg support frame. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing welding fixtures, such as cumbersome operation, low efficiency in component placement, high cost of manual adjustment, and numerous errors, which affect welding quality and progress. Therefore, this invention proposes a welding fixture for leg support frames.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A welding fixture for a leg support frame, comprising:

[0008] The first welding fixture includes a first mounting plate, two sets of first fixing components, a fourth pressing mechanism, two first abutting mechanisms, and a set of second fixing components. The first welding fixture is used to place and fix multiple parts to be assembled into a leg support frame sub-assembly, so as to complete the assembly welding of the leg support frame sub-assembly.

[0009] It also includes a second welding fixture, which includes a second mounting plate, a third fixing component, two sets of fourth fixing components, and multiple sets of pressing mechanisms. The second welding fixture is used to place and fix multiple parts to complete the combined welding of the leg support frame assembly, the extension transmission bracket assembly, and the leg support cover plate spot welding assembly.

[0010] In one possible design, two sets of the first fixing components are arranged opposite to each other. The first fixing component includes a first sliding seat slidably mounted on the top of a first mounting plate. A first cylinder is fixedly mounted on the top of the first mounting plate, located near the edge of the first mounting plate. One end of the piston rod of the first cylinder is fixedly connected to one side of the first sliding seat. A third pressing mechanism is fixedly mounted on the top of the first sliding seat. A first pressing mechanism and a second pressing mechanism are fixedly mounted on the top of the first sliding seat via a bracket. The fourth pressing mechanism, the two first abutting mechanisms, and a set of the second fixing components are all located between the two first sliding seats. The fourth pressing mechanism is fixedly mounted on the top of the first mounting plate via a bracket. The two first abutting mechanisms are both fixedly mounted on the top of the first mounting plate via a bracket. The piston rods of the two first abutting mechanisms are in opposite directions and each cooperates with the adjacent first sliding seat. The second fixing component includes a second sliding seat slidably mounted on the top of the first mounting plate. A second cylinder is fixedly embedded in the top of the first mounting plate. One end of the piston rod of the second cylinder is fixedly connected to one side of the second sliding seat. A fifth pressing mechanism is fixedly mounted on the top of the second sliding seat.

[0011] In one possible design, the third fixing assembly includes two third sliding seats slidably disposed on the top of the second mounting plate. A third cylinder is disposed on the side of each of the two third sliding seats that is far apart from each other. Both third cylinders are fixedly connected to the top of the second mounting plate. One end of the piston rod of each of the two third cylinders is fixedly connected to one side of an adjacent third sliding seat. A sixth pressing mechanism and an eighth pressing mechanism are fixedly mounted on the top of one of the third sliding seats, and a seventh pressing mechanism is fixedly mounted on the top of the other third sliding seat. A second abutting mechanism is fixedly mounted on the top of the second mounting plate via a bracket. The second abutting mechanism cooperates with the sixth, seventh, and eighth pressing mechanisms to clamp and fix the corresponding components. The fourth fixing assembly includes a fourth sliding seat slidably disposed on the top of the second mounting plate. A fourth cylinder is fixedly mounted on the top of the second mounting plate. One end of the piston rod of the fourth cylinder is fixedly connected to one side of an adjacent fourth sliding seat. The fourth fixing assembly also includes two ninth pressing mechanisms, both of which are fixedly mounted on the top of the second mounting plate via brackets. Both ninth pressing mechanisms are located on the fourth sliding seat. On the side of the moving seat away from the fourth cylinder, both of the ninth pressing mechanisms cooperate with the fourth sliding seat to press and fix the corresponding parts; a tenth pressing mechanism is fixedly installed on the top of the second mounting plate by a bracket, and the tenth pressing mechanism cooperates with the fourth fixing component; the multiple sets of pressing mechanisms include three eleventh pressing mechanisms, two twelfth pressing mechanisms, four thirteenth pressing mechanisms, and one fourteenth pressing mechanism, wherein the three eleventh pressing mechanisms are fixedly installed on the top of the second mounting plate by a bracket, and are used to press and fix the corresponding parts; the four thirteen ... The thirteen pressing mechanisms are arranged in pairs, with each pair of thirteenth pressing mechanisms cooperating with the adjacent twelfth pressing mechanism. The two twelfth pressing mechanisms and the multiple thirteenth pressing mechanisms are fixedly connected to the top of the second mounting plate. The fourteenth pressing mechanism is located between the two pairs of thirteenth pressing mechanisms and is fixedly installed on the top of the second mounting plate by a bracket. The fourteenth pressing mechanism cooperates with the two pairs of thirteenth pressing mechanisms. The two twelfth pressing mechanisms, the two pairs of thirteenth pressing mechanisms, and the fourteenth pressing mechanism are all used to press and fix the corresponding components.

[0012] In one possible design, the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, eleventh, twelfth, thirteenth, and fourteenth pressing mechanisms all have the same structure. Each consists of a drive cylinder, a mounting base, a rotating bracket, a rotating head, and a pressing plate. The mounting base is fixedly installed on the top of the drive cylinder. One end of the piston rod of the drive cylinder passes through the mounting base and is fixedly connected to the rotating head. The rotating bracket is rotatably installed on the top of the mounting base. One end of the pressing plate is rotatably connected to the rotating head, and the outer wall of the pressing plate is rotatably connected to the rotating bracket. The drive cylinder can drive the pressing plate to perform lever movement with the rotating bracket as a fulcrum, thereby raising and lowering one end of the pressing plate.

[0013] In one possible design, the first abutting mechanism and the second abutting mechanism have the same structure, both consisting of a cylinder and an abutting plate. One end of the piston rod of the cylinder is fixedly connected to one side of the abutting plate to push the abutting plate to press and fix the parts.

[0014] In one possible design, four support legs are fixedly installed on the bottom of both the first and second mounting plates to secure them to the platform to be installed. Photoelectric switches are fixedly installed on one side of both the first and second mounting plates to control the operation of multiple components.

[0015] In this application, when the first welding fixture is in use, the operator can place the various parts required for the leg support frame sub-assembly at the corresponding positions on the first mounting plate. The two sets of first fixing components, one fourth pressing mechanism, two first abutting mechanisms and one set of second fixing components work together to clamp and fix the parts.

[0016] Once all components are secured, the welding of the leg support frame sub-assembly can begin. After welding is completed, the piston rods of each cylinder retract, releasing the clamps on the components. The operator can then remove the welded assembly from the first welding fixture.

[0017] When using the second welding fixture, the operator can place multiple components that make up the leg support frame assembly, the extension transmission bracket assembly, and the leg support cover plate spot welding assembly on the second mounting plate; the third fixing component, two sets of fourth fixing components, and multiple sets of pressing mechanisms on the second mounting plate begin to work together.

[0018] Once all components are secured, the leg support frame assembly, extension transmission bracket assembly, and leg support cover plate spot welding assembly can be assembled and welded. After welding, the operator can remove the welded assembly from the second welding fixture.

[0019] In this welding fixture, when multiple pressing mechanisms are in operation, their corresponding drive cylinders will push one end of the corresponding pressing plate to lift and lower; the other end of the pressing plate moves synchronously with the rotating bracket as the fulcrum, thereby completing the pressing and releasing of the corresponding parts; at the same time, when the two abutting mechanisms are in operation, they will also drive the corresponding abutting plates to extend through the cylinders, thereby fixing the parts with the adjacent brackets or pressing mechanisms, ensuring the precise and stable placement of multiple parts.

[0020] Beneficial effects: In this utility model, the welding fixture for the leg support frame includes a first welding fixture and a second welding fixture. The first welding fixture is used for the combined welding of the leg support frame sub-assemblies, and the second welding fixture is used for the combined welding of the leg support frame assembly, the extension transmission bracket assembly, and the leg support cover plate spot welding assembly. By rationally designing the fixing components, pressing mechanisms, and abutment mechanisms on different fixtures, the needs of various welding assemblies can be met, reducing the number of fixtures designed and manufactured, lowering costs, and improving the versatility and applicability of the fixtures.

[0021] In this invention, the welding fixture for a leg support frame comprises two welding fixtures. The components on the first and second welding fixtures work together to precisely position and clamp the parts. For example, the first fixing component, the fourth pressing mechanism, the first abutting mechanism, and the second fixing component in the first welding fixture cooperate to fix the parts from multiple directions, ensuring that the parts do not shift or shake during welding. The third fixing component, the fourth fixing component, and multiple pressing mechanisms in the second welding fixture can also precisely position and press different parts, ensuring the accuracy of the welding position, improving welding quality, and enhancing welding strength.

[0022] In this utility model, the welding fixture for the leg support frame is described. Most of the components in the fixture are driven by cylinders, realizing automated operation. The operator only needs to place the parts in the corresponding positions and start the fixture. Each cylinder will work according to the preset program to complete the positioning, clamping and pressing of the parts. This not only reduces the labor intensity of the operator, but also avoids the errors caused by manual adjustment by the operator, greatly improves production efficiency, and can meet the needs of large-scale production.

[0023] In this utility model, the welding fixture for the leg support frame has four support legs fixedly installed at the bottom of both the first mounting plate and the second mounting plate, which facilitates fixing to the platform to be installed and ensures the stability of the fixture; at the same time, photoelectric switches are fixedly installed on one side of both the first mounting plate and the second mounting plate to control multiple components to work, realizing automated control and making operation more convenient and faster.

[0024] In this utility model, the welding fixture includes first and second welding fixtures, which are used for the combined welding of different assemblies respectively. At the same time, by rationally designing the fixing components, pressing and abutting mechanisms, it can meet a variety of welding needs, reduce the number of fixtures designed and manufactured, reduce costs, and improve versatility and applicability. The coordinated work of each component can ensure accurate welding position, and most of them are driven by cylinders, which makes operation simple, reduces labor intensity, avoids errors caused by manual adjustment, improves production efficiency, and can meet the needs of large-scale production. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of a welding fixture for a leg support frame proposed in this utility model.

[0026] Figure 2 This is a schematic diagram of the first welding fixture structure for a welding fixture for a leg support frame proposed in this utility model;

[0027] Figure 3 This is a schematic diagram of the second welding fixture structure for a welding fixture for a leg support frame proposed in this utility model;

[0028] Figure 4 This is a schematic diagram of the pressing mechanism of a welding fixture for a leg support frame proposed in this utility model.

[0029] In the diagram: 1. Leg support frame sub-assembly; 2. First welding fixture; 3. Leg support frame assembly; 4. Extension transmission bracket assembly; 5. Leg support cover plate spot welding assembly; 6. Second welding fixture; 7. First mounting plate; 8. First sliding seat; 9. First cylinder; 10. First pressing mechanism; 11. Second pressing mechanism; 12. Third pressing mechanism; 13. Fourth pressing mechanism; 14. First abutment mechanism; 15. Second sliding seat; 16. Second cylinder; 17. Fifth pressing mechanism; 18. Second mounting plate; 19. 20. Third sliding seat; 21. Third cylinder; 22. Sixth pressing mechanism; 23. Seventh pressing mechanism; 24. Eighth pressing mechanism; 25. Second abutment mechanism; 26. Fourth sliding seat; 27. Fourth cylinder; 28. Ninth pressing mechanism; 29. ​​Tenth pressing mechanism; 30. Eleventh pressing mechanism; 31. Twelfth pressing mechanism; 32. Thirteenth pressing mechanism; 33. Fourteenth pressing mechanism; 34. Drive cylinder; 35. Mounting seat; 36. Rotating head; 37. Rotating bracket; 38. Pressing plate. Detailed Implementation

[0030] 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.

[0031] Example 1: Refer to Figure 1-4 A welding fixture for a leg support frame includes: a first welding fixture 2 and a second welding fixture 6.

[0032] In this embodiment, the first welding fixture 2 is responsible for placing and fixing multiple parts to be assembled into the leg support frame sub-assembly 1, so as to complete the combined welding of the leg support frame sub-assembly 1; the second welding fixture 6 is used to place and fix multiple parts to complete the combined welding of the leg support frame assembly 3, the extension transmission bracket assembly 4, and the leg support cover plate spot welding assembly 5.

[0033] In this embodiment, the first welding fixture 2 includes a first mounting plate 7, two sets of first fixing components, a fourth pressing mechanism 13, two first abutting mechanisms 14, and a set of second fixing components. The first mounting plate 7 serves as the basic support component for the entire first welding fixture 2.

[0034] Furthermore, in this embodiment, two sets of first fixing components are disposed opposite to each other on the top of the first mounting plate 7. Each set of first fixing components includes a first sliding seat 8 slidably mounted on the top of the first mounting plate 7. A first cylinder 9 is fixedly mounted on the top of the first mounting plate 7, and the first cylinder 9 is located near the edge of the first mounting plate 7. One end of the piston rod of the first cylinder 9 is fixedly connected to one side of the first sliding seat 8. When the piston rod of the first cylinder 9 extends or retracts, it can drive the first sliding seat 8 to slide on the top of the first mounting plate 7. A third pressing mechanism 12 is fixedly mounted on the top of the first sliding seat 8. At the same time, a first pressing mechanism 10 and a second pressing mechanism 11 are also fixedly mounted on the top of the first sliding seat 8 through a bracket. The first pressing mechanism 10, the second pressing mechanism 11 and the third pressing mechanism 12 work together to press and fix the parts placed on the first sliding seat 8.

[0035] Furthermore, in this embodiment, the fourth pressing mechanism 13, the two first abutting mechanisms 14, and a set of second fixing components are all located between the two first sliding seats 8. The fourth pressing mechanism 13 is fixedly installed on the top of the first mounting plate 7 via a bracket, and is used to press and fix components at specific positions. The two first abutting mechanisms 14 are both fixedly installed on the top of the first mounting plate 7 via brackets, and the piston rods of the two first abutting mechanisms 14 are in opposite directions, and they both cooperate with adjacent first sliding seats 8. During the sliding process of the first sliding seat 8, the piston rods of the first abutting mechanisms 14 can extend or retract, and cooperate with the brackets provided on the top of the adjacent first sliding seats 8 to abut and fix the components at the corresponding positions.

[0036] Furthermore, in this embodiment, the second fixing component includes a second sliding seat 15 slidably disposed on the top of the first mounting plate 7. A second cylinder 16 is fixedly embedded in the top of the first mounting plate 7, and one end of the piston rod of the second cylinder 16 is fixedly connected to one side of the second sliding seat 15. By extending and retracting the piston rod of the second cylinder 16, the second sliding seat 15 can be driven to slide on the top of the first mounting plate 7. A fifth pressing mechanism 17 is fixedly installed on the top of the second sliding seat 15, and the fifth pressing mechanism 17 is used to press and fix the components placed in the corresponding positions.

[0037] In this embodiment, the second welding fixture 6 includes a second mounting plate 18, a third fixing component, two sets of fourth fixing components, and multiple sets of pressing mechanisms, wherein the second mounting plate 18 is the basic support component of the entire second welding fixture 6.

[0038] Furthermore, in this embodiment, the third fixing component includes two third sliding seats 19 slidably disposed on the top of the second mounting plate 18. A third cylinder 20 is provided on each side of the two third sliding seats 19 that are far apart from each other. Both third cylinders 20 are fixedly connected to the top of the second mounting plate 18, and one end of the piston rod of each third cylinder 20 is fixedly connected to one side of the adjacent third sliding seat 19. By extending or retracting the piston rod of the third cylinder 20, the two third sliding seats 19 can be moved closer or further apart from each other on the top of the second mounting plate 18. A sixth pressing mechanism 21 and an eighth pressing mechanism 23 are fixedly installed on the top of one third sliding seat 19, and a seventh pressing mechanism 22 is fixedly installed on the top of the other third sliding seat 19. The top of the second mounting plate 18 is fixedly mounted with a second abutting mechanism 24 by a bracket. The second abutting mechanism 24 cooperates with the sixth pressing mechanism 21, the seventh pressing mechanism 22 and the eighth pressing mechanism 23. When the parts are placed in the corresponding positions, the piston rod of the second abutting mechanism 24 extends and works together with each pressing mechanism to complete the clamping and fixing of the corresponding parts.

[0039] Furthermore, in this embodiment, the fourth fixing component includes a fourth sliding seat 25 slidably mounted on the top of the second mounting plate 18. A fourth cylinder 26 is fixedly mounted on the top of the second mounting plate 18, and one end of the piston rod of the fourth cylinder 26 is fixedly connected to one side of the adjacent fourth sliding seat 25. Through the extension and retraction of the piston rod of the fourth cylinder 26, the fourth sliding seat 25 can be driven to slide on the top of the second mounting plate 18. The fourth fixing component also includes two ninth pressing mechanisms 27. Both ninth pressing mechanisms 27 are fixedly mounted on the top of the second mounting plate 18 via brackets. Both ninth pressing mechanisms 27 are located on the side of the fourth sliding seat 25 away from the fourth cylinder 26 and cooperate with the fourth sliding seat 25. When the fourth sliding seat 25 slides to a suitable position, the ninth pressing mechanism 27 can press and fix the parts placed on the fourth sliding seat 25. A tenth pressing mechanism 28 is also fixedly mounted on the top of the second mounting plate 18 via brackets. The tenth pressing mechanism 28 cooperates with the fourth fixing component to further enhance the fixing effect on the parts.

[0040] Furthermore, in this embodiment, the multiple pressing mechanisms include three eleventh pressing mechanisms 29, two twelfth pressing mechanisms 30, four thirteenth pressing mechanisms 31, and one fourteenth pressing mechanism 32. The three eleventh pressing mechanisms 29 are all fixedly installed on the top of the second mounting plate 18 via brackets, used to press and fix the corresponding components. The four thirteenth pressing mechanisms 31 are arranged in pairs, with each pair of thirteenth pressing mechanisms 31 cooperating with an adjacent twelfth pressing mechanism 30. The two twelfth pressing mechanisms 30 and the multiple thirteenth pressing mechanisms 31 are all fixedly connected to the top of the second mounting plate 18. The fourteenth pressing mechanism 32 is located between the two pairs of thirteenth pressing mechanisms 31, fixedly installed on the top of the second mounting plate 18 via brackets, and cooperates with the two pairs of thirteenth pressing mechanisms 31. The two twelfth pressing mechanisms 30, the two pairs of thirteenth pressing mechanisms 31, and the fourteenth pressing mechanism 32 work together to press and fix the corresponding components, ensuring the stability of the components' position during the welding process.

[0041] In this embodiment, the first pressing mechanism 10, the second pressing mechanism 11, the third pressing mechanism 12, the fourth pressing mechanism 13, the fifth pressing mechanism 17, the sixth pressing mechanism 21, the seventh pressing mechanism 22, the eighth pressing mechanism 23, the ninth pressing mechanism 27, the tenth pressing mechanism 28, the eleventh pressing mechanism 29, the twelfth pressing mechanism 30, the thirteenth pressing mechanism 31, and the fourteenth pressing mechanism 32 all have the same structure. Each pressing mechanism consists of a drive cylinder 33, a mounting base 34, a rotating bracket 36, a rotating head 35, and a pressing plate 37. The mounting base 34 is fixedly installed on the top of the drive cylinder 33, and one end of the piston rod of the drive cylinder 33 passes through the mounting base 34 and is fixedly connected to the rotating head 35. The rotating bracket 36 is rotatably installed on the top of the mounting base 34, one end of the pressing plate 37 is rotatably connected to the rotating head 35, and the outer wall of the pressing plate 37 is rotatably connected to the rotating bracket 36. When the piston rod of the drive cylinder 33 extends or retracts, it drives the pressing plate 37 to perform lever motion with the rotating bracket 36 as the fulcrum, thereby raising and lowering one end of the pressing plate 37. When it is necessary to fix a part, the piston rod of the drive cylinder 33 extends, and one end of the pressing plate 37 falls to press and fix the part; when it is necessary to remove a part, the piston rod of the drive cylinder 33 retracts, and one end of the pressing plate 37 rises to stop fixing the part.

[0042] In this embodiment, the first abutting mechanism 14 and the second abutting mechanism 24 have the same structure, both consisting of a cylinder and an abutting plate. One end of the piston rod of the cylinder is fixedly connected to one side of the abutting plate. When the piston rod of the cylinder extends, it can push the abutting plate forward to complete the pressing and fixing of the parts; when the piston rod of the cylinder retracts, the abutting plate moves backward to stop fixing the parts.

[0043] This application can be used in the field of seat manufacturing technology, or in other fields applicable to this application.

[0044] Example 2: Reference Figure 1 , 2 3. An improvement based on Example 1: a welding fixture for a leg support frame, which is applied to the field of seat manufacturing technology;

[0045] In this embodiment, four support legs are fixedly installed on the bottom of both the first mounting plate 7 and the second mounting plate 18. By using the support legs to fix the tooling to the platform to be installed, good stability can be ensured during operation.

[0046] In this embodiment, photoelectric switches are fixedly installed on one side of both the first mounting plate 7 and the second mounting plate 18. The corresponding photoelectric switches are electrically connected to multiple components in the tooling to control the multiple components to work and realize the automated operation of the tooling.

[0047] However, as is well known to those skilled in the art, the working principles and wiring methods of multiple photoelectric switches, multiple cylinders and drive cylinder 33 are commonplace and are all conventional means or common knowledge, so they will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0048] The working principle and usage process of this technical solution are as follows: When the first welding fixture 2 is in use, the operator can place the various parts required for the leg support frame sub-assembly 1 into the corresponding positions of the first mounting plate 7. The two sets of first fixing components, one fourth pressing mechanism 13, two first abutting mechanisms 14 and one set of second fixing components work together to clamp and fix the parts.

[0049] Specifically, the piston rod of the first cylinder 9 extends, which can push the first sliding seat 8 to move along the guide rail toward the center of the mounting plate; the first pressing mechanism 10, the second pressing mechanism 11 and the third pressing mechanism 12 on the top of each sliding seat are activated simultaneously, and their driving cylinder 33 pushes the pressing plate 37 to form a lever motion, thereby positioning and pressing the corresponding parts; the piston rods of the two first abutting mechanisms 14 are pushed out, which can make their abutting plates cooperate with the brackets on the top of the sliding seats to complete the abutment of the parts at the corresponding positions; the fourth pressing mechanism 13 located on the central axis of the mounting plate works in cooperation with the first fixing component, while the second cylinder 16 drives the second sliding seat 15 to move laterally, and the fifth pressing mechanism 17 on its top fixes the central node of the skeleton vertically; the pressing plate 37 of the fourth pressing mechanism 13 forms a covering pressing from above, and together with the fifth pressing mechanism 17, it constitutes a three-dimensional spatial positioning;

[0050] Once all components are secured, the welding of the leg support frame sub-assembly 1 can be performed. After welding is completed, the piston rods of each cylinder retract, releasing the clamps on the components. The operator can then remove the welded assembly from the first welding fixture 2.

[0051] When using the second welding fixture 6, the operator can place multiple components constituting the leg support frame assembly 3, the extension transmission bracket assembly 4, and the leg support cover plate spot welding assembly 5 on the second mounting plate 18; the third fixing component, two sets of fourth fixing components, and multiple sets of pressing mechanisms on the second mounting plate 18 begin to work together.

[0052] Specifically, the two third cylinders 20 drive the corresponding third sliding seats 19 to move closer to each other, which can drive the sixth pressing mechanism 21, the seventh pressing mechanism 22 and the eighth pressing mechanism 23 to form a clamping on both sides of the frame assembly. With the push-out of the abutment plate of the second abutment mechanism 24, the axial positioning of the bracket assembly can be further realized. At the same time, the two fourth cylinders 26 drive the corresponding fourth sliding seats 25 to move, and the ninth pressing mechanism 27 on its top and the adjacent tenth pressing mechanism 28 form a pressing and fixing of the corresponding parts. Then, with the cooperation of multiple eleventh pressing mechanisms 29, two sets of thirteenth pressing mechanisms 31 and two thirteenth pressing mechanisms, the parts located at the edge of the second mounting plate 18 can be pressed and fixed by lever movement.

[0053] Once all components are secured, the leg support frame assembly 3, the extension transmission bracket assembly 4, and the leg support cover plate spot welding assembly 5 can be assembled and welded. After welding, the operator can remove the welded assembly from the second welding fixture 6.

[0054] In this welding fixture, when multiple pressing mechanisms are in operation, their corresponding drive cylinders 33 will push one end of the corresponding pressing plate 37 to lift and lower; the other end of the pressing plate 37 moves synchronously with the rotating bracket 36 as the fulcrum, thereby completing the pressing and releasing of the corresponding parts; at the same time, when the two abutting mechanisms are in operation, they will also drive the corresponding abutting plates to extend through the cylinders, thereby fixing the parts with the adjacent brackets or pressing mechanisms, ensuring the precise and stable placement of multiple parts.

[0055] The accompanying drawings in this 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.

[0056] 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 welding fixture for a leg rest framework, characterized by, include: The first welding fixture (2) includes a first mounting plate (7), two sets of first fixing components, a fourth pressing mechanism (13), two first abutting mechanisms (14) and a set of second fixing components. The first welding fixture (2) is used to place and fix multiple parts to be assembled into a leg support frame sub-assembly (1) in order to complete the assembly welding of the leg support frame sub-assembly (1). It also includes a second welding fixture (6), which includes a second mounting plate (18), a third fixing component, two sets of fourth fixing components and multiple pressing mechanisms. The second welding fixture (6) is used to place and fix multiple parts to complete the combined welding of the leg support frame assembly (3), the extension transmission bracket assembly (4), and the leg support cover plate spot welding assembly (5).

2. A welding fixture for leg rest frames as defined in claim 1, characterized in that Two sets of the first fixing components are arranged opposite to each other. The first fixing component includes a first sliding seat (8) slidably mounted on the top of the first mounting plate (7). A first cylinder (9) is fixedly mounted on the top of the first mounting plate (7). The first cylinder (9) is located near the edge of the first mounting plate (7). One end of the piston rod of the first cylinder (9) is fixedly connected to one side of the first sliding seat (8). A third pressing mechanism (12) is fixedly mounted on the top of the first sliding seat (8). A first pressing mechanism (10) and a second pressing mechanism (11) are fixedly mounted on the top of the first sliding seat (8) through a bracket. The fourth pressing mechanism (13), the two first abutting mechanisms (14) and a set of the second fixing components are all positioned... Between the two first sliding seats (8), the fourth pressing mechanism (13) is fixedly installed on the top of the first mounting plate (7) by a bracket, and the two first abutting mechanisms (14) are fixedly installed on the top of the first mounting plate (7) by a bracket. The piston rods of the two first abutting mechanisms (14) are in opposite directions and they cooperate with the adjacent first sliding seats (8). The second fixing assembly includes a second sliding seat (15) slidably disposed on the top of the first mounting plate (7). A second cylinder (16) is fixedly embedded on the top of the first mounting plate (7). One end of the piston rod of the second cylinder (16) is fixedly connected to one side of the second sliding seat (15). A fifth pressing mechanism (17) is fixedly installed on the top of the second sliding seat (15).

3. A welding fixture for leg rest frames as defined in claim 2, wherein, The third fixing component includes two third sliding seats (19) slidably disposed on the top of the second mounting plate (18). A third cylinder (20) is provided on the side of each of the two third sliding seats (19) that is far from each other. Both third cylinders (20) are fixedly connected to the top of the second mounting plate (18). One end of the piston rod of each of the two third cylinders (20) is fixedly connected to one side of the adjacent third sliding seat (19). A sixth pressing mechanism (21) and an eighth pressing mechanism (23) are fixedly installed on the top of one of the third sliding seats (19), and a seventh pressing mechanism (22) is fixedly installed on the top of the other third sliding seat (19). A second abutting mechanism (24) is fixedly installed on the top of the second mounting plate (18) via a bracket. The second abutting mechanism (24) cooperates with the sixth pressing mechanism (21), the seventh pressing mechanism (22), and the eighth pressing mechanism (23) to complete the corresponding zero... The clamping and fixing of components; the fourth fixing assembly includes a fourth sliding seat (25) slidably mounted on the top of the second mounting plate (18), a fourth cylinder (26) fixedly mounted on the top of the second mounting plate (18), one end of the piston rod of the fourth cylinder (26) being fixedly connected to one side of the adjacent fourth sliding seat (25), the fourth fixing assembly also includes two ninth pressing mechanisms (27), both of the ninth pressing mechanisms (27) being fixedly mounted on the top of the second mounting plate (18) by brackets, both of the ninth pressing mechanisms (27) being located on the side of the fourth sliding seat (25) away from the fourth cylinder (26), both of the ninth pressing mechanisms (27) cooperating with the fourth sliding seat (25) to complete the pressing and fixing of the corresponding components; the top of the second mounting plate (18) is fixedly mounted with a tenth pressing mechanism (28) by brackets, the tenth pressing mechanism (28) cooperating with the fourth fixing assembly;The multiple sets of pressing mechanisms include three eleventh pressing mechanisms (29), two twelfth pressing mechanisms (30), four thirteenth pressing mechanisms (31), and one fourteenth pressing mechanism (32). The three eleventh pressing mechanisms (29) are fixedly mounted on the top of the second mounting plate (18) via brackets, and are used to press and fix the corresponding components. The four thirteenth pressing mechanisms (31) are arranged in pairs, with each pair of thirteenth pressing mechanisms (31) cooperating with an adjacent twelfth pressing mechanism (30). The two twelfth pressing mechanisms (30) and... Multiple thirteenth pressing mechanisms (31) are fixedly connected to the top of the second mounting plate (18). The fourteenth pressing mechanism (32) is located between the two sets of thirteenth pressing mechanisms (31). The fourteenth pressing mechanism (32) is fixedly installed on the top of the second mounting plate (18) by a bracket. The fourteenth pressing mechanism (32) cooperates with the two sets of thirteenth pressing mechanisms (31). The two twelfth pressing mechanisms (30), the two sets of thirteenth pressing mechanisms (31), and the fourteenth pressing mechanism (32) are all used to complete the pressing and fixing of the corresponding parts.

4. A welding fixture for leg rest frames as claimed in any one of claims 2-3, characterized in that The first pressing mechanism (10), the second pressing mechanism (11), the third pressing mechanism (12), the fourth pressing mechanism (13), the fifth pressing mechanism (17), the sixth pressing mechanism (21), the seventh pressing mechanism (22), the eighth pressing mechanism (23), the ninth pressing mechanism (27), the tenth pressing mechanism (28), the eleventh pressing mechanism (29), the twelfth pressing mechanism (30), the thirteenth pressing mechanism (31), and the fourteenth pressing mechanism (32) all have the same structure. They all consist of a drive cylinder (33), a mounting base (34), a rotating bracket (36), a rotating head (35), and a pressing plate ( 37) The mounting base (34) is fixedly mounted on the top of the drive cylinder (33). One end of the piston rod of the drive cylinder (33) passes through the mounting base (34) and is fixedly connected to the rotating head (35). The rotating bracket (36) is rotatably mounted on the top of the mounting base (34). One end of the pressing plate (37) is rotatably connected to the rotating head (35). The outer wall of the pressing plate (37) is rotatably connected to the rotating bracket (36). The drive cylinder (33) can drive the pressing plate (37) to perform lever movement with the rotating bracket (36) as the fulcrum, so as to realize the lifting and lowering of one end of the pressing plate (37).

5. A welding fixture for leg rest frames as claimed in any one of claims 2-3, characterized in that The first abutting mechanism (14) and the second abutting mechanism (24) have the same structure. They are both composed of a cylinder and an abutting plate. One end of the piston rod of the cylinder is fixedly connected to one side of the abutting plate to push the abutting plate to press and fix the parts.

6. A welding fixture for leg rest frames as defined in claim 1, wherein, The bottom of the first mounting plate (7) and the second mounting plate (18) are each fixedly equipped with four support legs to fix them to the platform to be installed. A photoelectric switch is fixedly installed on one side of the first mounting plate (7) and the second mounting plate (18) to control multiple components to work.

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