A lifting platform bottom frame welding tool

Abstract

The application discloses a lifting platform bottom frame welding tool, which comprises a multi-station adjustable welding unit, a plurality of positioning tools are arranged on the multi-station adjustable welding unit, the positioning tool comprises a frame body, a positioning connecting block is arranged at each of four corners of the lower end of the frame body, and two first positioning units are symmetrically arranged at the rear half of the frame body; two fixing units are symmetrically arranged at the front half of the frame body, each fixing unit is arranged on a fixing plate, each fixing plate is detachably connected with the frame body, and a jacking unit connected with the frame body is arranged between each fixing unit. The application has the beneficial effects of improving efficiency, reducing the unqualified rate, being high in stability, being wide in applicability, being simple to operate, being low in manufacturing cost and being not easy to be damaged.

Description

Technical Field

[0001] This invention relates to a welding fixture, and more particularly, to a welding fixture for the bottom frame of a lifting platform. Background Technology

[0002] The chassis is a frame structure spanning the front and rear axles of a car, commonly known as a beam, and is the base of the vehicle. It generally consists of two longitudinal beams and several transverse beams, supported on the wheels via the suspension system, front axle, and rear axle. During chassis manufacturing, the various components need to be welded together. Currently, most welding is done manually. However, manual welding has several drawbacks. First, the varying skill levels of each operator lead to inconsistent weld quality, resulting in many defective products, impacting efficiency and increasing costs. Second, it is slow and physically demanding, especially for large-scale chassis welding, requiring more operators working in shifts. Third, the lack of stable positioning during welding affects weld quality and makes the chassis prone to deformation. To address this issue, specialized positioning welding frames are used. While this method ensures a certain level of stability, its manufacturing cost is high, and it is not applicable to welding different chassis models, resulting in limited practicality.

[0003] Therefore, those skilled in the art are dedicated to providing a welding fixture for the bottom frame of a lifting platform that can effectively solve the above-mentioned technical problems. Summary of the Invention

[0004] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a welding fixture for the bottom frame of a lifting platform that can effectively solve the above-mentioned technical problem.

[0005] To achieve the above objectives, the present invention provides a welding fixture for the bottom frame of a lifting platform, including a multi-position adjustable welding unit. The multi-position adjustable welding unit is provided with a plurality of positioning fixtures. The positioning fixture includes a frame, and positioning connecting blocks are provided at the four corners of the lower end of the frame. Two first positioning units are symmetrically arranged in the rear half of the frame.

[0006] The front half of the frame is symmetrically provided with two fixing units, each fixing unit is respectively set on a fixing plate, each fixing plate is detachably connected to the frame, and a jacking unit connected to the frame is provided between each fixing unit.

[0007] Preferably, the multi-station adjustable welding unit includes a base, on which two guide rails are provided, and on each guide rail a plurality of slide blocks are slidably provided, and each frame body is slidably connected to the guide rails through each of the slide blocks;

[0008] The base has a third column at each of its four corners. The upper end of each third column is connected to the lower end of the four corners of the top plate. A vertical displacement mechanism is provided above the base. The two ends of the vertical displacement mechanism are slidably connected to each of the third columns. Several welding mechanisms are movably provided on the vertical displacement mechanism. Each welding mechanism is provided with a welding head positioning frame.

[0009] Preferably, the vertical displacement mechanism includes two displacement cylinders mounted on the top plate. The output end of each displacement cylinder can movably pass through the top plate and connect to the upper end of each crossbar. Both ends of each crossbar are slidably sleeved on each guide rod. A limit block is detachably mounted on the upper end of each guide rod. The lower end of each guide rod is connected to the base. Two guide members are provided below each crossbar. The upper ends of both sides of each guide member are connected to the lower end of each crossbar through connecting columns. Both ends of each welding mechanism are slidably connected to each guide member and driven by a power unit.

[0010] Preferably, an adjustment hole is provided along the length direction of the guide member;

[0011] The welding mechanism includes an adjusting seat, with the guide members extending slidably from both ends of the adjusting seat through adjusting holes and movably sleeved on the guide posts. Each guide post is respectively disposed on each guide member, and one of the guide posts is provided with a threaded section and is threadedly connected to the guide member through the threaded section. The power unit includes a mounting box, which is disposed on the guide member. A displacement motor is disposed inside the mounting box, and the output end of the displacement motor is connected to the guide post with the threaded section.

[0012] Preferably, the upper end of the adjusting seat is provided with a bidirectional adjusting cylinder, and the output end of the bidirectional adjusting cylinder is provided with a fixing block. Each fixing block extends downward through an opening in the adjusting seat and is connected to the welding head positioning frame.

[0013] Preferably, the first positioning unit includes a first positioning plate, on which a front locking mechanism and a side locking mechanism are provided. The front locking mechanism includes a first column detachably disposed on the first positioning plate, and a first locking element is provided at the upper end of the first column.

[0014] The side locking mechanism includes a second column that is detachably mounted on the first positioning plate. The second column is higher than the first column, and a second locking element is provided at the upper end of the second column.

[0015] Preferably, the first locking member includes a locking seat detachably connected to the first column. The locking seat includes a positioning part and a guide part. A locking rod is movably inserted into the guide part. One end of the locking rod is hinged to one end of the first connecting member. The other end of the first connecting member is hinged to the second connecting member. The second connecting member is rotatably connected to the positioning part. A handle is provided at the upper end of the second connecting member. The second locking member has the same structure as the first locking member.

[0016] Preferably, each of the first positioning plates is provided with first positioning posts symmetrically arranged.

[0017] The first positioning post is provided with a plurality of first mounting holes, and the first positioning post is adjustablely provided with a positioning plate and a first lateral limiting platform.

[0018] Preferably, the fixing unit includes a second lateral limiting platform that cooperates with the first lateral limiting platform. The fixing plate is provided with a clamping mechanism, which includes a positioning rod connected to the fixing plate. The upper end of the positioning rod has a slot, and a positioning block is sleeved on the positioning rod. The positioning block has a protrusion. The fixing plate is provided with a rotating component, which has a clamping part. The outer middle part of the rotating component has a slot that cooperates with the protrusion. The upper part of the rotating component is rotatably provided with a clamping rod that cooperates with the slot. The fixing plate is provided with a positioning conical column.

[0019] Preferably, the jacking unit includes two second positioning columns connected to the frame, each second positioning column having a second mounting hole, and an adjustable mounting plate on each second positioning column. The upper ends of each mounting plate are connected via a connecting plate, and a jacking cylinder connected to the frame is hinged to the lower part of the connecting plate. The output end of the jacking cylinder is hinged to the jacking frame, and the jacking frame is hinged to the connecting plate via two upright plates. Two support plates for supporting the jacking frame are provided on the connecting plate.

[0020] The beneficial effects of this invention are as follows: On the one hand, by replacing manual operation, this invention not only improves efficiency but also reduces the defect rate; on the other hand, it reduces the labor intensity of operators and is more stable; furthermore, it can be adjusted to suit different models of frames, making it widely applicable; it also has the advantages of simple operation, low manufacturing cost, and resistance to damage. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the multi-station adjustable welding unit of the present invention.

[0022] Figure 2 yes Figure 1A magnified schematic diagram of the structure at point A in the middle.

[0023] Figure 3 yes Figure 1 A magnified schematic diagram of the structure at point B in the middle.

[0024] Figure 4 This is a schematic diagram of the positioning fixture in this invention.

[0025] Figure 5 This is a schematic diagram of the structure of the first positioning unit in this invention.

[0026] Figure 6 yes Figure 5 A magnified schematic diagram of the structure at point C.

[0027] Figure 7 This is a three-dimensional structural diagram of the positioning tooling.

[0028] Figure 8 This is a structural diagram of a fixed unit.

[0029] Figure 9 This is a structural diagram of components such as the jacking unit.

[0030] Figure 10 This is a structural diagram showing the bottom frame and positioning fixture used together.

[0031] Figure 11 yes Figure 10 A schematic diagram of the three-dimensional structure viewed from below. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0033] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] like Figures 1 to 11 As shown, a welding fixture for the bottom frame of a lifting platform includes a multi-position adjustable welding unit 1. The multi-position adjustable welding unit 1 is provided with a plurality of positioning fixtures 2. The positioning fixture 2 includes a frame 3. Positioning connecting blocks 5 are provided at the four corners of the lower end of the frame 3. Two first positioning units 6 are symmetrically arranged in the rear half of the frame 3.

[0036] The front half of the frame 3 is symmetrically provided with two fixing units 7. Each fixing unit 7 is respectively set on a fixing plate 8. Each fixing plate 8 is detachably connected to the frame 3. A jacking unit 9 connected to the frame 3 is provided between each fixing unit 7.

[0037] The multi-station adjustable welding unit 1 includes a base 10, on which two guide rails 12 are provided. Each guide rail 12 is slidably provided with a plurality of slide blocks 11. Each frame 3 can be slidably connected to the guide rails 12 through each slide block 11.

[0038] The base 10 has a third column 13 at each of its four corners. The upper end of each third column 13 is connected to the lower end of the four corners of the top plate 15. The base 10 has a vertical displacement mechanism 16 above it. The two ends of the vertical displacement mechanism 16 are slidably connected to each of the third columns 13. The vertical displacement mechanism 16 has several welding mechanisms 17 that are movably mounted on it. Each welding mechanism 17 has a welding head positioning frame 18.

[0039] The vertical displacement mechanism 16 includes two displacement cylinders 19 mounted on the top plate 15. The output end of each displacement cylinder 19 can movably pass through the top plate 15 and connect to the upper end of each crossbar 20. The two ends of each crossbar 20 are slidably sleeved on each guide rod 21. The upper end of each guide rod 21 is detachably provided with a limit block 22. The lower end of each guide rod 21 is connected to the base 10. Two guide members 23 are provided below each crossbar 20. The upper ends of both sides of each guide member 23 are connected to the lower end of each crossbar 20 through connecting columns 26. The two ends of each welding mechanism 17 are slidably connected to each guide member 23 and driven by a power unit.

[0040] An adjustment hole 27 is provided along the length direction of the guide member 23;

[0041] The welding mechanism 17 includes an adjusting seat 28, with both ends of the adjusting seat 28 extending slidably from the guide member 23 through adjusting holes 27 and movably sleeved on the guide post 29. Each guide post 29 is respectively disposed on each guide member 23, and one of the guide posts 29 is provided with a threaded section and is threadedly connected to the guide member 23 through the threaded section. The power unit includes a mounting housing 30, which is disposed on the guide member 23. A displacement motor is disposed inside the mounting housing 30, and the output end of the displacement motor is connected to the guide post 29 with the threaded section.

[0042] The upper end of the adjusting seat 28 is provided with a bidirectional adjusting cylinder 31, and the output end of the bidirectional adjusting cylinder 31 is provided with a fixing block 33. Each fixing block extends downward through an opening in the adjusting seat 28 and is connected to the welding head positioning frame 18.

[0043] The first positioning unit 6 includes a first positioning plate 32, on which a front locking mechanism 36 and a side locking mechanism 37 are provided. The front locking mechanism 36 includes a first column 50 detachably disposed on the first positioning plate 32, and a first locking member 38 is provided at the upper end of the first column 50.

[0044] The side locking mechanism 37 includes a second column 51 detachably mounted on the first positioning plate 32. The second column 51 is higher than the first column 50, and a second locking member 39 is provided at the upper end of the second column 51.

[0045] The first locking member 38 includes a locking seat 55 detachably connected to the first column 50. The locking seat 55 includes a positioning part 56 and a guide part 57. A locking rod 58 is movably inserted into the guide part 57. One end of the locking rod 58 is hinged to one end of the first connecting member 59. The other end of the first connecting member 59 is hinged to the second connecting member 60. The second connecting member 60 is rotatably connected to the positioning part 56. A handle 61 is provided at the upper end of the second connecting member 60. The second locking member 39 has the same structure as the first locking member 38.

[0046] Each of the first positioning plates 32 is symmetrically provided with a first positioning post 62; the first positioning post 62 is provided with a plurality of first mounting holes 63, and the first positioning post 62 is adjustablely provided with a positioning plate 66 and a first transverse limiting platform 67. The fixing unit 7 includes a second transverse limiting platform that cooperates with the first transverse limiting platform 67. The fixing plate 8 is provided with a clamping mechanism 69, the clamping mechanism 69 includes a positioning rod 70 connected to the fixing plate 8, the upper end of the positioning rod 70 is provided with a slot 71, the positioning rod 70 is fitted with a positioning block 72, the positioning block 72 is provided with a protrusion 73, the fixing plate 8 is provided with a rotating part 75, the rotating part 75 is provided with a clamping part 76, the outer middle part of the rotating part 75 is provided with a slot that cooperates with the protrusion 73, the upper part of the rotating part 75 is rotatably provided with a clamping rod that cooperates with the slot 71, and the fixing plate 8 is provided with a positioning conical post 77.

[0047] The jacking unit 9 includes two second positioning columns 78 connected to the frame 3. Each second positioning column 78 is provided with a second mounting hole 79. An adjustable mounting plate 80 is provided on the second positioning column 78. The upper end of each mounting plate 80 is connected by a connecting plate 81. A jacking cylinder 82 connected to the frame 3 is hinged to the lower part of the connecting plate 81. The output end of the jacking cylinder 82 is hinged to the jacking frame 83. The jacking frame 83 is hinged to the connecting plate 81 through two upright plates 86. Two support plates for supporting the jacking frame 83 are provided on the connecting plate 81.

[0048] The bottom frame 100 is positioned by the positioning fixture 2, and several bottom frames are set on the slide 11. The welding mechanism 17 is moved up and down by the displacement cylinder 19, moved left and right by the power unit, and moved forward and backward by the bidirectional adjustment cylinder 31. The welding equipment is installed on the welding head positioning frame 18, so that the positioning fixture 2 ensures the stability of the welding equipment while allowing for multi-directional adjustment of the welding equipment in all directions. The size and number of adjustable welding units 1 can be set according to actual needs. The bottom frame can be lifted by pushing the support frame 83 upward by the jacking cylinder 82, which facilitates the removal of the workpiece.

[0049] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A welding fixture for the bottom frame of a lifting platform, characterized in that: It includes a multi-station adjustable welding unit (1), which is provided with several positioning fixtures (2). The positioning fixtures (2) include a frame (3), and positioning connecting blocks (5) are provided at the four corners of the lower end of the frame (3). Two first positioning units (6) are symmetrically arranged in the rear half of the frame (3). The front half of the frame (3) is symmetrically provided with two fixing units (7), each fixing unit (7) is respectively set on each fixing plate (8), each fixing plate (8) is detachably connected to the frame (3), and a jacking unit (9) connected to the frame (3) is provided between each fixing unit (7). The first positioning unit (6) includes a first positioning plate (32), and the first positioning plate (32) is provided with a front locking mechanism (36) and a side locking mechanism (37). The front locking mechanism (36) includes a first column (50) detachably disposed on the first positioning plate (32), and a first locking member (38) is disposed at the upper end of the first column (50). The side locking mechanism (37) includes a second column (51) detachably mounted on the first positioning plate (32), the second column (51) being higher than the first column (50), and a second locking member (39) being mounted on the upper end of the second column (51). Each of the first positioning plates (32) is provided with a first positioning post (62) symmetrically arranged. The first positioning post (62) is provided with a plurality of first mounting holes (63), and the first positioning post (62) is adjustablely provided with a positioning plate (66) and a first transverse limiting platform (67). The fixing unit (7) includes a second transverse limiting platform that works in conjunction with the first transverse limiting platform (67). The fixing plate (8) is provided with a clamping mechanism (69). The clamping mechanism (69) includes a positioning rod (70) connected to the fixing plate (8). The upper end of the positioning rod (70) is provided with a slot (71). A positioning block (72) is sleeved on the positioning rod (70). A protrusion (73) is provided on the positioning block (72). The fixing plate (8) is provided with a rotating part (75). The rotating part (75) is provided with a clamping part (76). A slot that works in conjunction with the protrusion (73) is provided in the middle of the outer side of the rotating part (75). A clamping rod that works in conjunction with the slot (71) is rotatably provided on the upper part of the rotating part (75). A positioning conical column (77) is provided on the fixing plate (8). The jacking unit (9) includes two second positioning columns (78) connected to the frame (3). Each second positioning column (78) is provided with a second mounting hole (79). The second positioning column (78) is adjustablely provided with a mounting plate (80). The upper end of each mounting plate (80) is connected through a connecting plate (81). The lower part of the connecting plate (81) is hinged to a jacking cylinder (82) connected to the frame (3). The output end of the jacking cylinder (82) is hinged to the jacking frame (83). The jacking frame (83) is hinged to the connecting plate (81) through two upright plates (86). The connecting plate (81) is provided with two support plates for supporting the jacking frame (83).

2. The welding fixture for the bottom frame of the lifting platform as described in claim 1, characterized in that: The multi-station adjustable welding unit (1) includes a base (10), on which two guide rails (12) are provided. Each guide rail (12) is slidably provided with a number of slide blocks (11). Each frame (3) can be slidably connected to the guide rails (12) through each slide block (11). The base (10) has a third column (13) at each of its four corners. The upper end of each third column (13) is connected to the lower end of the four corners of the top plate (15). The base (10) has a vertical displacement mechanism (16) above it. The two ends of the vertical displacement mechanism (16) are slidably connected to each of the third columns (13). The vertical displacement mechanism (16) has several welding mechanisms (17) movably mounted on it. Each welding mechanism (17) has a welding head positioning frame (18).

3. The welding fixture for the bottom frame of the lifting platform as described in claim 2, characterized in that: The vertical displacement mechanism (16) includes two displacement cylinders (19) mounted on the top plate (15). The output end of each displacement cylinder (19) can movably pass through the top plate (15) and is connected to the upper end of each crossbar (20). The two ends of each crossbar (20) are slidably sleeved on each guide rod (21). The upper end of each guide rod (21) is detachably provided with a limit block (22). The lower end of each guide rod (21) is connected to the base (10). Two guide members (23) are provided below each crossbar (20). The upper ends of both sides of each guide member (23) are connected to the lower end of each crossbar (20) through connecting columns (26). The two ends of each welding mechanism (17) are slidably connected to each guide member (23) and driven by a power unit.

4. The welding fixture for the bottom frame of the lifting platform as described in claim 3, characterized in that: An adjustment hole (27) is provided along the length direction of the guide (23); The welding mechanism (17) includes an adjustment seat (28), both ends of which extend slidably from the guide member (23) through adjustment holes (27) and are movably sleeved on the guide post (29). Each guide post (29) is respectively set on each guide member (23). One of the guide posts (29) is provided with a threaded section and is threadedly connected to the guide member (23) through the threaded section. The power unit includes a mounting box (30), which is set on the guide member (23). A displacement motor is provided inside the mounting box (30), and the output end of the displacement motor is connected to the guide post (29) with the threaded section.

5. The welding fixture for the bottom frame of the lifting platform as described in claim 4, characterized in that: The upper end of the adjusting seat (28) is provided with a bidirectional adjusting cylinder (31), and the output end of the bidirectional adjusting cylinder (31) is provided with a fixing block (33). Each fixing block extends downward through an opening on the adjusting seat (28) and is connected to the welding head positioning frame (18).

6. The welding fixture for the bottom frame of the lifting platform as described in claim 5, characterized in that: The first locking member (38) includes a locking seat (55) detachably connected to the first column (50). The locking seat (55) includes a positioning part (56) and a guide part (57). A locking rod (58) is movably inserted on the guide part (57). One end of the locking rod (58) is hinged to one end of the first connecting member (59). The other end of the first connecting member (59) is hinged to the second connecting member (60). The second connecting member (60) is rotatably connected to the positioning part (56). A handle (61) is provided at the upper end of the second connecting member (60). The second locking member (39) has the same structure as the first locking member (38).

Images