Chair frame welding fixing tool
By using a modularly designed chair frame welding fixture, multi-dimensional rapid fixing is achieved through components such as bidirectional lead screws and L-shaped clamps, solving the problems of cumbersome clamping and limited welding space in existing technologies, and improving production efficiency and welding quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI FUMAO HOME FURNISHING CO LTD
- Filing Date
- 2025-07-09
- Publication Date
- 2026-08-04
AI Technical Summary
The existing chair frame welding fixtures are cumbersome to clamp, have low production efficiency, and limited welding space, which affects welding quality.
The chair frame welding and fixing fixture adopts a modular design, including a mounting platform, anti-slip placement plate, limit block, connecting frame and adjustable fasteners. It achieves multi-dimensional rapid fixing through components such as two-way screws, suction cups and L-shaped clamps, and is suitable for chair frames of different sizes and shapes.
It simplifies the clamping process, improves production efficiency, ensures unrestricted welding space, and enhances welding accuracy and quality.
Smart Images
Figure CN224587319U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of welding processing technology, and in particular to a welding and fixing fixture for a chair frame. Background Technology
[0002] In the chair manufacturing process, the welding quality of the chair frame is crucial. Traditional chair frame welding methods rely heavily on manual positioning and support, which is not only labor-intensive but also makes it difficult to guarantee welding precision due to human factors. This results in significant dimensional deviations in the chair frame and inconsistent product quality.
[0003] However, existing technologies, such as Chinese Publication No. CN212398662U, describe a chair frame welding and fixing fixture, belonging to the field of welding processing machinery technology. This fixture includes a base plate with symmetrically mounted limiting blocks on its upper surface. Each limiting block contains a workpiece that is fitted into it. The workpiece is mounted on a support frame and secured by a fastening mechanism. The fastening mechanism includes a fastening mechanism I for pressing the front legs of the chair frame, a fastening mechanism II for pressing and fixing the chair frame seat cushion and the front legs from above, and a fastening mechanism III for pressing and fixing the chair frame rear legs and the chair frame seat cushion from above. By adding fastening mechanisms in different positions and cooperating with limiting blocks, the workpiece can be quickly and accurately assembled into a chair frame, thereby improving the welding accuracy and assembly efficiency of the chair frame.
[0004] However, in actual use, it has been found that the device has multiple fastening mechanisms, each of which is independently controlled. When fixing the device, each of these fastening mechanisms must be operated one by one, which is not only cumbersome but also time-consuming. If mass production is required, the production efficiency of this device is low and it is difficult to meet the requirements. Moreover, the frame structure design of this device does not provide enough space for welding operations. Some of the fastening mechanisms also need to be installed on the front support crossbar. When welding the chair, it is necessary to hand-hold the welding gun to weld the joints. The structural design of this device may hinder the movement of the welding gun, thereby affecting the welding quality. Utility Model Content
[0005] The purpose of this invention is to solve the problems in the existing technology, such as cumbersome clamping process, low production efficiency, and limited welding space of the device, which affects welding quality.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a chair frame welding and fixing fixture, comprising: a mounting platform; two placement plates, each with an anti-slip surface on its upper end; limiting blocks, fixedly connected to the left and right ends of the placement plates and engaged in movable slots opened on the left and right sides of the mounting platform; a connecting frame, disposed on one side of one of the placement plates, with a set of mounting blocks fixedly connected to its upper ends on both sides, and a first fixing member disposed between the set of mounting blocks; and two mounting arms, disposed on the upper end of the other placement plate, with a connecting rod connecting the two arms in the middle, and a second fixing member disposed on the connecting rod.
[0007] The technical advantages of adopting the above-mentioned further solution are: the device can be quickly positioned by using the mounting platform, two placement plates with anti-slip surfaces and limit blocks; the first fixing part on the connecting frame and the second fixing part on the mounting arm can fix the chair frame; the connecting rod can adjust the mounting arm, which can stably fix the frame, facilitate welding, and improve accuracy and efficiency.
[0008] In a preferred embodiment, the first fixing member includes: a bidirectional lead screw, rotatably disposed between a set of mounting blocks; a first handwheel, fixedly connected to one end of the bidirectional lead screw; and two clamping arms, each with an opening on its side, and the opening sides of the two clamping arms are arranged opposite to each other.
[0009] The technical effect of adopting the above-mentioned further solution is that the first fixing member is linked to the first handwheel through the bidirectional screw. Rotating the handwheel can make the two clamping arms move in opposite directions along the screw. The workpiece is clamped or released by the relatively set opening side. The structure is simple and easy to operate. The clamping force and range can be flexibly adjusted to achieve stable fixation of the chair frame component.
[0010] In a preferred embodiment, the first fixing member further includes: a stop post, which is disposed through the top of the clamping arm, and the other end of which is disposed through the top of the clamping arm and extends downward; a suction cup, which is fixedly connected to the bottom end of the stop post; and a first threaded rod, which is disposed on the front side of the clamping arm, with a second handwheel fixedly connected to one end of the rod, and a top block fixedly connected to the other end of the rod through the surface of the clamping arm.
[0011] The technical effect of adopting the above-mentioned further solution is that: rotating the second handwheel causes the abutment block to press against the object, and the suction cup at the bottom of the abutment column can be adsorbed and fixed. Combined with the two-way screw and clamping arm, the chair frame can be firmly clamped from multiple directions, including the top, bottom and sides, thereby enhancing the stability and applicability of the fixation.
[0012] In a preferred embodiment, the first fixing block further includes a locking block, which is fixedly connected to the bottom of the clamping arm and cooperates with the guide groove opened at the upper end of the connecting frame.
[0013] The technical effect of adopting the above-mentioned further solution is that the first fixing component is equipped with a locking block, which cooperates with the guide groove of the connecting frame to guide the clamping arm to move along the groove, ensuring that the clamping arm slides smoothly and accurately, avoiding deviation and shaking, enhancing the structural stability during clamping, making the bidirectional screw drive the clamping arm to move more smoothly, and improving the reliability and positioning accuracy of fixing the chair frame.
[0014] In a preferred embodiment, the second fixing member includes: two movable blocks slidably connected to the connecting rod; and an L-shaped clamping block disposed above the placement plate, with a connecting post connected to its upper end, the other end of which is fixedly connected to the movable blocks.
[0015] The technical effect of adopting the above-mentioned further solution is that the second fixing member can be adjusted in position through two movable blocks on the connecting rod. The movable blocks are connected to the connecting column of the L-shaped clamping block, which can flexibly adjust the height and lateral position of the L-shaped clamping block above the placement plate, adapt to chair frames of different sizes, realize multi-angle, adjustable clamping and fixing, and improve the flexibility and versatility of tooling use.
[0016] In a preferred embodiment, the second fixing block further includes: a second threaded rod, which is laterally disposed within the mounting arm, with one end passing through the mounting arm and extending forward; a connecting block, which is rotatably connected to one end of the second threaded rod, and the connecting block is fixedly connected to one side of the L-shaped clamping block; and a third handwheel, which is fixedly connected to the other end of the second threaded rod.
[0017] The technical effect of adopting the above-mentioned further solution is that: rotating the handwheel can drive the threaded rod to drive the connecting block, so that the L-shaped clamping block can move laterally and accurately adjust the clamping position; in conjunction with the height adjustment of the movable block on the connecting rod, the L-shaped clamping block can be finely adjusted in both horizontal and vertical directions, thereby enhancing the positioning accuracy and clamping flexibility of the chair frame.
[0018] In a preferred embodiment, the second fixing block further includes an elastic pad disposed on the transverse surface of the L-shaped clamping block, which can generate a certain elastic deformation between the chair leg and the L-shaped clamping block.
[0019] The technical effect of adopting the above-mentioned further solution is that: by adding an elastic pad to the horizontal surface of the L-shaped clamping block, the pressure can be buffered by elastic deformation when clamping the chair leg, avoiding damage or deformation of the chair leg surface caused by rigid clamping. At the same time, the elastic tension is used to enhance the clamping stability, adapt to the fixing of chair legs of different materials, and improve the protection and compatibility of the tooling.
[0020] In a preferred embodiment, the upper end of the mounting platform has multiple sets of through holes, and the upper end of the limiting block has a limiting groove with the same diameter as the through holes. A pin is movably disposed in the limiting groove to restrict the movement of the limiting block on the mounting platform.
[0021] The technical effect of adopting the above-mentioned further solution is that: the upper end of the mounting platform is provided with multiple sets of through holes, the upper end of the limiting block is opened with a limiting groove, and the pin shaft in the groove can be inserted into the through hole. By inserting and removing the pin shaft, the limiting block can be restricted or allowed to slide in the moving groove, so as to realize the quick locking and adjustment of the position of the placement plate, adapt to the fixing requirements of chair frames of different sizes, and enhance the flexibility and positioning accuracy of the tooling.
[0022] Compared with the prior art, the advantages and positive effects of this utility model are as follows:
[0023] 1. This utility model significantly optimizes the welding process of chair frames through modular and convenient design. Two placement plates can slide flexibly along the mounting platform's moving slots, requiring only the insertion of pins for quick positioning, adapting to chair frames of different sizes. The first fixing component's bidirectional screw, in conjunction with double clamping arms, achieves synchronous, opposite clamping by rotating the first handwheel. Combined with suction cup adsorption and abutment block clamping, it quickly and dimensionally fixes the components. The second fixing component's L-shaped clamping block, driven by a third handwheel, allows for flexible lateral adjustment, with elastic gaskets adaptively conforming to the component surface. The entire clamping process is simple to operate, significantly reducing clamping time and substantially improving production efficiency.
[0024] 2. This utility model provides ample space for welding operations through a reasonable layout. The placement plate slides and adjusts on the mounting platform, allowing for efficient space planning based on the frame dimensions. The bottom locking block of the clamping arm in the first fixing component cooperates with the guide groove to ensure the stability of the clamping arm without excessively encroaching on the welding area. The movable block and L-shaped clamping block of the second fixing component can be flexibly adjusted to avoid critical welding areas. This design allows welding operations to be unrestricted by space, enabling welders to perform welding operations more smoothly, ensuring precise welding positions and stable welding processes, thereby effectively improving welding quality and avoiding welding defects caused by space constraints. Attached Figure Description
[0025] Figure 1 A three-dimensional structural diagram of a chair frame welding and fixing fixture provided by this utility model;
[0026] Figure 2 An enlarged structural diagram of the clamping arm of a chair frame welding and fixing fixture provided by this utility model;
[0027] Figure 3 An enlarged structural diagram of the mounting arm of a chair frame welding and fixing fixture provided by this utility model;
[0028] Figure 4 This is an enlarged structural diagram of the mounting platform of a chair frame welding and fixing fixture provided by this utility model.
[0029] Legend:
[0030] 1. Mounting platform; 2. Limiting block; 3. Placement plate; 4. Connecting frame; 5. Mounting block; 6. Two-way lead screw; 7. First handwheel; 8. Clamping arm; 9. Support column; 10. Suction cup; 11. Second handwheel; 12. First threaded rod; 13. Supporting block; 14. Locking block; 15. Guide groove; 16. Mounting arm; 17. Connecting rod; 18. Movable block; 19. Connecting column; 20. L-shaped clamping block; 21. Second threaded rod; 22. Third handwheel; 23. Connecting block; 24. Elastic washer; 25. Through hole; 26. Limiting groove; 27. Pin; 28. Moving groove. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] Please see Figure 1-4 This utility model provides a technical solution: a chair frame welding and fixing fixture, characterized in that it includes: a mounting platform 1, with symmetrical movable grooves 28 on the left and right sides of the mounting platform 1, and two placement plates 3 are fitted into the movable grooves 28 by limiting blocks 2 at their left and right ends, so as to achieve sliding along the direction of the movable grooves 28. In order to limit the relative distance between the two limiting blocks 2, the mounting platform 1 and the limiting blocks 2 are respectively provided with through holes 25 and limiting grooves 26 of the same diameter. A pin 27 is movably arranged in the limiting groove 26 to limit the relative displacement of the limiting blocks 2 on the mounting platform 1.
[0033] One of the placement plates 3 is vertically fixed to the side of the connecting frame 4. The top two sides of the connecting frame 4 are parallel to the mounting blocks 5. A set of mounting blocks 5 are horizontally rotatably connected to a bidirectional screw rod 6 to form the first fixed component mounting base.
[0034] Two mounting arms 16 are vertically fixed to the upper surface of another mounting plate 3 by bolts, and a connecting rod 17 is horizontally fixed in the middle of the two mounting arms 16 to form the second fixing component mounting structure.
[0035] By sliding the placement plate 3 on the mounting platform 1, the distance between the two sets of fixing components can be flexibly adjusted to meet the fixing requirements of chair frames of different sizes, effectively improving the versatility of the tooling.
[0036] The upper surface of the placement board 3 features an anti-slip design, providing a stable base for the chair frame.
[0037] like Figure 1-4 As shown, the first fixing component includes a bidirectional lead screw 6 driving structure and a clamping arm 8 clamping structure;
[0038] One end of the bidirectional lead screw 6 passes through the mounting block 5 and is fixedly connected to the first handwheel 7. Rotating the first handwheel 7 can drive the bidirectional lead screw 6 to rotate between the mounting blocks 5.
[0039] The two clamping arms 8 have openings on their sides and engage with the reverse threaded sections on both sides of the bidirectional lead screw 6 through threaded holes. When the bidirectional lead screw 6 rotates, the two clamping arms 8 move towards or away from each other along the axis of the lead screw.
[0040] The top of the clamping arm 8 is provided with a through hole 25, through which the abutment post 9 passes. The bottom end is fixedly connected to the suction cup 10. By pressing the abutment post 9, the suction cup 10 can be made to fit tightly against the surface of the chair frame component.
[0041] The clamping arm 8 has a threaded hole on the front. The first threaded rod 12 passes through the hole, one end of which is fixed to the second handwheel 11, and the other end is connected to the abutment block 13. Rotating the second handwheel 11 can push the abutment block 13 to press against the front of the chair frame component.
[0042] The locking block 14 at the bottom of the clamping arm 8 is embedded in the guide groove 15 at the top of the connecting frame 4, providing guidance and limiting for the movement of the clamping arm 8, realizing multi-directional stable clamping of the chair frame components, ensuring accurate component positioning during welding, and effectively preventing displacement.
[0043] like Figure 1-4 As shown, the second fixing component adopts an adjustable clamping structure, and two movable blocks 18 are sleeved on the connecting rod 17 through the through holes 25, and can slide along the connecting rod 17.
[0044] The L-shaped clamping block 20 is vertically fixed to the bottom of the movable block 18 via the connecting post 19;
[0045] A second threaded rod 21 is horizontally arranged inside the mounting arm 16. One end of the rod passes through the mounting arm 16 and is fixedly connected to the third handwheel 22. The other end is rotatably connected to the connecting block 23 through a bearing. The connecting block 23 is fixed to the side of the L-shaped clamping block 20.
[0046] Rotating the third handwheel 22 can drive the second threaded rod 21 to rotate, thereby pushing the connecting block 23 and the L-shaped clamping block 20 to move laterally along the mounting arm 16;
[0047] The L-shaped clamping block 20 has an elastic pad 24 attached to its horizontal side. When clamping the chair frame component, it can fit tightly against the surface of the component through elastic deformation, providing a stable clamping force while avoiding damage to the surface of the component.
[0048] The combination of movable block 18 and L-shaped clamping block 20 can be flexibly adjusted according to the shape and position of the chair frame components, so as to reliably fix components such as chair legs of different shapes and meet diverse welding and fixing needs.
[0049] Working principle: This equipment is a chair frame welding and fixing fixture. When using it, first adjust the overall layout according to the size of the chair frame. Slide the two placement plates 3 along the moving grooves 28 on the left and right sides of the mounting platform 1. After adjusting to a suitable distance, insert the pin 27 into the through hole 25 at the upper end of the mounting platform 1 and the limiting groove 26 on the limiting block 2 to fix the position of the placement plates 3.
[0050] Next, fix the chair frame components. For the first fixing part, place the chair frame component to be fixed on the placement plate 3 with the connecting frame 4, turn the first handwheel 7, and the double-acting screw 6 will rotate accordingly. Because the two clamping arms 8 are engaged with the reverse threaded sections on both sides of the double-acting screw 6, the clamping arms 8 will move towards each other to initially clamp the component; then press the abutment 9 to make the suction cup 10 at the bottom fit against the surface of the component, enhancing the fixing effect; if the component is still loose, turn the second handwheel 11, and the first threaded rod 12 will push the abutment block 13 to further tighten the component. At the same time, the locking block 14 at the bottom of the clamping arm 8 slides in the guide groove 15 of the connecting frame 4 to ensure the stability and accuracy of the movement of the clamping arm 8.
[0051] The second fixing part is used to fix other components. The component is placed on the corresponding placement plate 3. The movable block 18 on the sliding connecting rod 17 is adjusted according to the position of the component to adjust the position of the L-shaped clamping block. The third handwheel 22 is rotated, and the second threaded rod 21 rotates to drive the connecting block 23 and the L-shaped clamping block to move laterally, so that the L-shaped clamping block is close to the component. After the elastic pad 24 on the horizontal surface of the L-shaped clamping block contacts the component, it produces elastic deformation and fits tightly, so as to achieve reliable fixing.
[0052] Once all components of the chair frame are secured, check that each fixing point is firmly in place. After confirming everything is in order, welding can begin. During welding, the multi-directional fixing structure of the fixture effectively prevents component displacement, ensuring welding accuracy and quality. After welding, reverse the above steps, loosen all fixing parts, and remove the welded chair frame to complete the entire operation.
[0053] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.
Claims
1. A chair frame welding fixture, comprising: Mounting platform (1), characterized in that, There are two placement boards (3), and the upper end of each board is provided with an anti-slip surface. The limiting block (2) is fixedly connected to the left and right ends of the placement plate (3) and is engaged in the moving slots (28) opened on the left and right sides of the mounting platform (1); A connecting frame (4) is set on one side of one of the placement plates (3), and a set of mounting blocks (5) are fixedly connected to both sides of its upper end. A first fixing member is provided between the set of mounting blocks (5). There are two mounting arms (16), which are installed on the upper end of another placement plate (3). A connecting rod (17) is connected between the two arms, and a second fixing member is provided on it.
2. The welding fixture for a chair frame according to claim 1, wherein The first fastener includes: A bidirectional lead screw (6) is rotatably mounted between a set of mounting blocks (5); The first handwheel (7) is fixedly connected to one end of the double-acting lead screw (6); There are two clamping arms (8), each with an opening on its side, and the opening sides of the two arms are arranged opposite each other.
3. The welding fixture for a chair frame according to claim 2, wherein The first fastener also includes: The abutment (9) is disposed at the top of the clamping arm (8), and its other end is disposed at the top of the clamping arm (8) and extends downward; The suction cup (10) is fixedly connected to the bottom end of the abutment (9); The first threaded rod (12) is located on the front of the clamping arm (8), with a second handwheel (11) fixedly connected to one end, and a stop block (13) fixedly connected to the other end through the surface of the clamping arm (8).
4. The welding fixture for a chair frame according to claim 2, wherein The first fastener also includes: The locking block (14) is fixedly connected to the bottom of the clamping arm (8) and cooperates with the guide groove (15) opened at the upper end of the connecting frame (4).
5. The chair frame welding fixture of claim 1, wherein, The second fastener includes: Two movable blocks (18) are provided and are slidably connected to the connecting rod (17); L-shaped clamp (20) is positioned above the placement plate (3), with a connecting post (19) connected to its upper end. The other end of the connecting post (19) is fixedly connected to the movable block (18).
6. The chair frame welding fixture of claim 5, wherein, The second fastener also includes: The second threaded rod (21) is arranged laterally inside the mounting arm (16), with one end passing through the mounting arm (16) and extending forward; The connecting block (23) is rotatably connected to one end of the second threaded rod (21), and the connecting block (23) is fixedly connected to one side of the L-shaped clamp (20); The third handwheel (22) is fixedly connected to the other end of the second threaded rod (21).
7. The chair frame welding fixture of claim 5, wherein, The second fastener also includes: The elastic pad (24) is set on the horizontal surface of the L-shaped clamp (20) and can produce a certain elastic deformation between the chair leg and the L-shaped clamp (20).
8. The chair frame welding fixture of claim 1, wherein: The upper end of the mounting platform (1) has multiple through holes (25), and the upper end of the limiting block (2) has a limiting groove (26) with the same diameter as the through holes (25). A pin (27) is movably arranged in the limiting groove (26) to restrict the movement of the limiting block (2) on the mounting platform (1).