Clamping and fixing device for welding of automobile seat framework

Abstract

The invention belongs to the technical field of automobile seat manufacturing, particularly relates to a clamping and fixing device for automobile seat framework welding, and aims to solve the problems that after a framework is fixed by a clamping and fixing device, the clamping and fixing device cannot move, and the position and direction of the framework are inconvenient to adjust. A bearing column is fixedly inserted into the center of the upper surface of the working base plate, a rotating disc is rotationally connected to the position, close to the top end, of the circumferential outer wall of the bearing column, supporting columns are evenly fixedly inserted into the positions, close to the circumferential edge, of the lower surface of the rotating disc, and a rectangular plate is welded to the bottom ends of the supporting columns. Clamping blocks are welded to the positions, close to the two sides, of the lower surface of the rectangular plate, and the same wheel shaft is clamped to the bottom ends of the two clamping blocks. Through the arrangement of the rotary disc, the direction of clamping the seat framework can be adjusted, and then the welding angle is changed, so that the uniformity and the welding quality of a welding seam are ensured, posture adjustment of a welder is reduced, the complexity of manual operation is reduced, and the welding process is more efficient.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seat manufacturing, and in particular to a welding, clamping and fixing device for an automobile seat frame. Background Art

[0002] Car seats are not only one of the components in the vehicle that most directly contacts the passengers, but also play a key role in driving safety, comfort and functionality. A well-designed and fully functional seat can significantly enhance the driving experience, provide passengers with high-quality comfort and support, and also help reduce fatigue caused by long-term rides. Therefore, the design and manufacture of car seats are directly related to the overall performance of the vehicle and the safety of the passengers, and have become an indispensable core part of modern cars.

[0003] When the seat frame is being welded or other operations are being performed, the frame workpiece needs to be accurately clamped and fixed. The existing clamping and fixing devices cannot be moved after fixing the frame, which makes it inconvenient to adjust the position and direction of the frame, easily hinders welding, increases the difficulty of welding, and may also affect the strength after welding. In addition, the frame clamping device has poor adaptability and cannot meet the improved clamping requirements of the workpiece, which easily causes inaccurate positioning. Therefore, a welding clamping and fixing device for a car seat frame is proposed. Summary of the invention

[0004] The present invention provides a welding clamping and fixing device for an automobile seat frame in order to solve the problem that the clamping and fixing device cannot move after fixing the frame, and it is inconvenient to adjust the position and direction of the frame.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a welding clamping and fixing device for a car seat frame, comprising a working base plate, a bearing column is inserted and fixed at the center of the upper surface of the working base plate, and a turntable is rotatably connected to the circumferential outer wall of the bearing column near the top, and a supporting column is evenly inserted and fixed to the lower surface of the turntable near the circumferential edge, and a rectangular plate is welded to the bottom end of the supporting column, blocks are welded to the lower surface of the rectangular plate near both sides, and the bottom ends of the two blocks are clamped with the same wheel axle, and a roller is rotatably connected to the circumferential outer wall of the wheel axle near the middle, a translation mechanism is installed near both sides of the upper surface of the turntable, and the translation mechanism includes a loading column, a lifting mechanism is installed on the inner wall of the loading column, and the lifting mechanism includes a loading shaft, and a changing mechanism is installed at one end of the loading shaft near the middle of the turntable, and the changing mechanism includes a changing knot.

[0006] A further configuration of the present invention is that an annular wheel groove is opened on the upper surface of the working base plate near the bottom end of the roller, and the annular wheel groove is adapted to the roller, a spring gasket is fixed by bolts at one end of the upper surface of the turntable near the circumferential edge, and a contraction spring is welded on the upper surface of the spring gasket at a position deviating from the center of the circle, and a limiting disk is welded on the top of the contraction spring, a limiting rod is fixed by bolts at the center of the circle of the lower surface of the limiting disk, and the limiting rod passes through the turntable, limiting holes are evenly opened on the upper surface of the working base plate near the periphery of the annular wheel groove, and the limiting holes and the limiting rod are adapted to each other, and a scale groove is opened on the upper surface of the working base plate near the periphery of the limiting hole, and the scale groove and the limiting hole match.

[0007] A further arrangement of the present invention is that the translation mechanism includes a bearing plate, bearing plates are installed on the upper surface of the turntable near both sides, and a translation groove is opened near the middle of the upper surface of the bearing plate, and a pair of pulleys are placed at the bottom of the translation groove near the inner walls of both ends, the adjacent ends of the two pairs of pulleys are rotatably connected to the bearing shafts, and the circumferential inner walls of the two bearing shafts are rotatably connected to support blocks near the middle, the top ends of the two support blocks are fixed with the same pad by bolts, and the upper surface of the pad is welded with a loading column.

[0008] A further configuration of the present invention is that a limit plate is fixed by bolts at the bottom of the translation groove near the pulleys at both ends, and a pair of process holes are opened at the adjacent ends of the two limit plates, and the two bearing shafts pass through the process holes, and the upper surface of the bearing plate is opened with a slide groove near the two ends, and the lower surface of the pad is welded with a support slider near the middle of the two ends, and the support slider and the slide groove are adapted to each other.

[0009] A further arrangement of the present invention is that baffles are welded on adjacent ends of the two limit plates near both sides, a screw rod is screwed on the middle part of one side of the baffle away from the turntable, and a push plate is rotatably connected to the circumferential outer wall of the screw rod near the side of the support block, a positioning rod is inserted in the middle part of one side of the other baffle, and a pad is welded on the end of the positioning rod near the support block, and a support spring is welded on the side of the pad near the positioning rod that deviates from the center of the circle.

[0010] A further arrangement of the present invention is that the lifting mechanism includes a loading shaft, a loading groove is opened at the top of the loading column, and a hanging plate is clamped at the top of the loading column near one side, the inner wall of the loading groove is rotatably connected to a winding shaft near the top of both sides, and the circumferential outer wall of the winding shaft is connected to a chain belt, the other end of the chain belt and the hanging plate, the inner walls of both sides of the top of the loading groove are connected to guide rods at one end away from the hanging plate, and the circumferential outer wall of the guide rod is rotatably connected to a sleeve, the inner walls of both sides of the loading groove are opened near the middle, and the inner walls of the movable holes are slidably connected to the loading shaft, the circumferential inner wall of the loading shaft is rotatably connected to a toothed plate near the middle, and the toothed plate and the chain belt are meshed.

[0011] A further configuration of the present invention is that a counterweight ring is sleeved and fixed at one end of the circumferential outer wall of the loading shaft away from the turntable, a ratchet is sleeved and fixed at one end of the circumferential outer wall of the winding shaft close to the counterweight ring, and a fixing column is inserted into the outer wall of the loading column on one side close to the ratchet, and a pawl is rotatably connected to the circumferential outer wall of the fixing column, and the pawl and the ratchet match.

[0012] A further arrangement of the present invention is that the changing mechanism includes a changing knot, an end of the circumferential outer wall of the loading shaft away from the counterweight ring is rotatably connected with a changing knot, and a changing hole 1 is opened on the side of the changing knot away from the loading shaft, a plug hole is opened on the side of the changing knot close to the loading shaft, and the plug hole is adapted to the loading shaft, a loading rod is fixed to the bottom of the hole of the changing hole 1, and a movable shaft is inserted into the end of the outer wall of both ends of the loading rod away from the loading shaft, and the circumferential outer wall of the movable shaft is rotatably connected with connecting plates near both ends, the two connecting plates are welded with the same connecting disk on the side away from the loading shaft, and a reset spring is welded on the middle part of the side of the connecting disk away from the connecting plate, and the end of the reset spring away from the connecting plate is connected to a changing column, a reset groove is opened in the middle part of the side of the changing column close to the connecting plate, and the reset groove is adapted to the reset spring, and sliding rods are evenly welded on the side of the changing column close to the connecting plate near the circumferential edge, and the sliding rods pass through the connecting plate.

[0013] A further configuration of the present invention is that a second direction-changing hole is formed at the top of the direction-changing knot near the movable shaft, and an arc groove is formed at the side of the top of the direction-changing knot away from the insertion hole, and the arc groove matches the direction-changing column.

[0014] A further arrangement of the present invention is that a bottom plate is fixed by bolts on the side of the direction-changing column away from the direction-changing knot, and side plates are welded to the sides of the bottom plate away from the direction-changing column, one end of one of the side plates is screwed with a second screw rod, and a push plate is sleeved on the side of the second screw rod close to the other side plate, and a clamping block is fixed on the side of the push plate away from the second screw rod, and another clamping block with the same structure and opposite opening is fixed on the side of the other side plate close to the push plate.

[0015] In summary, the beneficial effects of this solution are:

[0016] 1. By setting the turntable, the direction of clamping the seat frame can be adjusted, and then the welding angle can be changed to ensure the uniformity and quality of the weld, reduce the welder's posture adjustment, reduce the complexity of manual operation, and make the welding process more efficient.

[0017] 2. By setting the chain belt, the height of the loading axis can be changed to adapt the height of the seat frame to the height of the operator, allowing the operator to maintain the best working posture, reduce fatigue and discomfort, and increase the flexibility of the clamping device.

[0018] 3. By setting a screw rod 1, the push plate pushes the support block, and the position of the pulley can be fine-tuned, thereby changing the relative distance of the clamping, which can adapt to seat frames of different sizes and shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the front end structure of a welding clamping and fixing device for an automobile seat frame proposed by the present invention;

[0020] Figure 2 This is a schematic diagram of the working base structure of a welding clamping and fixing device for an automobile seat frame proposed by the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of a bearing plate of a welding clamping and fixing device for an automobile seat frame proposed by the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of a loading column of a welding clamping and fixing device for a car seat frame proposed by the present invention;

[0023] Figure 5 A schematic diagram of the cross-sectional structure of a loading column of a welding clamping and fixing device for a car seat frame proposed by the present invention;

[0024] Figure 6 A welding clamping and fixing device for a car seat frame proposed by the present invention Figure 5 A schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 7 The present invention is a schematic diagram of the cross-sectional structure of a redirecting knot of a welding clamping and fixing device for an automobile seat frame proposed by the present invention.

[0026] In the figure: 1, working base plate; 101, annular wheel groove; 102, limiting hole; 103, scale groove; 2, limiting rod; 3, bearing plate; 301, translation groove; 302, slide groove; 4, loading column; 401, movable hole; 402, installation groove; 5, change-direction knot; 501, change-direction hole 1; 502, plug hole; 503, change-direction hole 2; 504, arc groove; 6, winding shaft; 7, turntable; 8, pad; 9, roller; 10, support column; 11, wheel axle; 12, block; 13, spring gasket; 14, contraction spring; 15, limit plate; 16, support slider; 17, pulley; 18, pad; 19 , positioning rod; 20, supporting spring; 21, supporting block; 22, pushing plate; 23, screw one; 24, baffle; 25, limiting plate; 2501, process hole; 26, clamping block; 27, chain belt; 28, hanging plate; 29, loading shaft; 30, counterweight ring; 31, toothed plate; 32, ratchet; 33, fixing column; 34, pawl; 35, guide rod; 36, sleeve; 37, movable shaft; 38, connecting plate; 39, connecting plate; 40, changing column; 4001, reset groove; 41, bottom plate; 42, side plate; 43, pushing plate; 44, screw two; 45, reset spring; 46, sliding rod; 47, loading rod. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] In this embodiment, refer to Figure 1-7 A welding clamping and fixing device for a car seat frame comprises a working base plate 1, a bearing column is plugged and fixed at the center of the upper surface of the working base plate 1, and a turntable 7 is rotatably connected to the outer wall of the bearing column near the top, and a support column 10 is evenly plugged and fixed near the circumferential edge of the lower surface of the turntable 7, and a rectangular plate is welded to the bottom end of the support column 10, and a clamping block 12 is welded to the lower surface of the rectangular plate near both sides, and the bottom ends of the two clamping blocks 12 are clamped with the same wheel shaft 11, and a roller is rotatably connected to the outer wall of the wheel shaft 11 near the middle. Wheel 9, a translation mechanism is installed on the upper surface of the turntable 7 near both sides, and the translation mechanism includes a loading column 4, a lifting mechanism is installed on the inner wall of the loading column 4, and the lifting mechanism includes a loading shaft 29, and a changing mechanism is installed at one end of the loading shaft 29 near the middle of the turntable 7, and the changing mechanism includes a changing knot 5; rotating the turntable 7 can adjust the direction of clamping the seat frame and adjust the welding angle to ensure the uniformity and welding quality of the weld, reduce the posture adjustment of the welder, reduce the complexity of manual operation, and make the welding process more efficient.

[0029] refer to Figure 2, an annular wheel groove 101 is opened on the upper surface of the working base plate 1 near the bottom end of the roller 9, and the annular wheel groove 101 is adapted to the roller 9, a spring gasket 13 is fixed by bolts at one end of the upper surface of the turntable 7 near the circumferential edge, and a contraction spring 14 is welded on the upper surface of the spring gasket 13 at a position deviating from the center of the circle, and a limiting disk 15 is welded on the top of the contraction spring 14, a limiting rod 2 is fixed by bolts at the center of the lower surface of the limiting disk 15, and the limiting rod 2 passes through the turntable 7, and limiting holes 102 are evenly opened on the outer periphery of the annular wheel groove 101 on the upper surface of the working base plate 1, and the limiting holes 102 are adapted to the limiting rod 2, and a scale groove 103 is opened on the upper surface of the working base plate 1 near the outer periphery of the limiting hole 102, and the scale groove 103 matches the limiting hole 102; by comparing the scale groove 103 and changing the connection position of the limiting hole 102 and the limiting rod 2, the rotation angle can be accurately controlled to ensure the quality of welding.

[0030] refer to Figure 1 , Figure 3 The translation mechanism includes a bearing plate 3, bearing plates 3 are installed on the upper surface of the turntable 7 near both sides, and a translation groove 301 is opened near the middle of the upper surface of the bearing plate 3, and a pair of pulleys 17 are placed at the bottom of the translation groove 301 near the inner walls of both ends, and the adjacent ends of the two pairs of pulleys 17 are rotatably connected with bearing shafts, and the circumferential inner walls of the two bearing shafts are rotatably connected with support blocks 21 near the middle, and the tops of the two support blocks 21 are fixed with the same pad 8 by bolts, and the upper surface of the pad 8 is welded with a loading column 4, and the bottom of the translation groove 301 is fixed with a limit plate 25 by bolts near the pulleys 17 at both ends, and a pair of process holes 2501 are opened at the adjacent ends of the two limit plates 25, and the two bearing shafts pass through the process holes 2501; the process holes 2501 can limit the range of motion of the pulley 17 to ensure that it is maintained within a safe range and prevents it from escaping from the bearing. Carrier plate 3; there are slide grooves 302 on the upper surface of the carrier plate 3 near both ends, and support sliders 16 are welded on the lower surface of the pad plate 8 near the middle of both ends, and the support slider 16 and the slide groove 302 are adapted to each other, and baffles 24 are welded on the adjacent ends of the two limit plates 25 near both sides, a screw rod 23 is screwed on the middle of one side of the baffle 24 away from the turntable 7, and a push plate 22 is rotatably connected to the side of the circumferential outer wall of the screw rod 23 near the support block 21, and a positioning rod 19 is inserted in the middle of one side of the other baffle 24, and a pad 18 is welded on the end of the positioning rod 19 near the support block 21, and a support spring 20 is welded on the side of the pad 18 near the positioning rod 19 that deviates from the center of the circle; rotating the screw rod 23 to make the push plate 22 push the support block 21, can fine-tune the position of the pulley 17, and then change the clamping distance, can adapt to seat frames of different sizes and shapes.

[0031] refer to Figure 1 , Figure 4 , Figure 5 , Figure 6The lifting mechanism includes a loading shaft 29, a mounting groove 402 is opened at the top of the loading column 4, and a hanging plate 28 is clamped at the top of the loading column 4 near one side, the inner wall of the mounting groove 402 is rotatably connected to the winding shaft 6 near the top of both sides, and the circumferential outer wall of the winding shaft 6 is connected to the chain belt 27, the other end of the chain belt 27 and the hanging plate 28, the inner walls of both sides of the top of the mounting groove 402 are connected to the ends away from the hanging plate 28, and the circumferential outer wall of the guide rod 35 is rotatably connected to the sleeve 36; the chain belt 27 bypasses the sleeve 36 to ensure the verticality of the chain belt 27 and the loading shaft 29, avoid angles, and do extra work; the inner walls of both sides of the mounting groove 402 are opened near the middle, and the inner wall of the movable hole 401 is slidably connected to the loading shaft 2 9. The circumferential inner wall of the loading shaft 29 is rotatably connected to a toothed disc 31 near the middle, and the toothed disc 31 is meshed with the chain belt 27. The circumferential outer wall of the loading shaft 29 is sleeved and fixed at one end away from the turntable 7. The circumferential outer wall of the winding shaft 6 is sleeved and fixed at one end near the counterweight ring 30. A fixing column 33 is inserted into the outer wall of the loading column 4 on one side near the ratchet 32. The circumferential outer wall of the fixing column 33 is rotatably connected to a pawl 34, and the pawl 34 and the ratchet 32 ​​match. The height of the loading shaft 29 can be changed by winding the chain belt 27, so that the height of the seat frame is adapted to the height of the operator, allowing the operator to maintain an optimal working posture, reducing fatigue and discomfort, and increasing the flexibility of the clamping device.

[0032] refer to Figure 4 , Figure 7The direction-changing mechanism includes a direction-changing knot 5, an end of the circumferential outer wall of the loading shaft 29 away from the counterweight ring 30 is rotatably connected with the direction-changing knot 5, and a direction-changing hole 501 is opened on the side of the direction-changing knot 5 away from the loading shaft 29, and a plug hole 502 is opened on the side of the direction-changing knot 5 close to the loading shaft 29, and the plug hole 502 is adapted to the loading shaft 29, a loading rod 47 is fixed to the bottom of the direction-changing hole 501, and a movable shaft 37 is inserted into the end of the outer wall of both ends of the loading rod 47 away from the loading shaft 29, and the circumferential outer wall of the movable shaft 37 is rotatably connected with a connecting plate 38 near both ends, the two connecting plates 38 are welded with the same connecting disk 39 on the side away from the loading shaft 29, and a reset spring 45 is welded on the middle part of the side of the connecting disk 39 away from the connecting plate 38, and the reset spring 45 is away from One end of the connecting plate 38 is connected to a direction-changing column 40, a reset groove 4001 is opened in the middle of one side of the direction-changing column 40 close to the connecting plate 38, and the reset groove 4001 is adapted to the reset spring 45, a sliding rod 46 is evenly welded on one side of the direction-changing column 40 close to the connecting plate 38 near the circumferential edge, and the sliding rod 46 passes through the connecting plate 38, a second direction-changing hole 503 is opened at the top of the direction-changing knot 5 close to the movable shaft 37, and an arc groove 504 is opened at the top of the direction-changing knot 5 away from the plug hole 502, and the arc groove 504 is matched with the direction-changing column 40; by setting the first direction-changing hole 501 and the second direction-changing hole 503, the direction of the direction-changing column 40 can be changed, and more and more complex seat frames can be adapted, thereby improving the scope of application of the equipment and increasing the clamping and fixing methods.

[0033] refer to Figure 7 A bottom plate 41 is fixed to the side of the direction-changing column 40 away from the direction-changing knot 5 by bolts, and side plates 42 are welded to the sides of the bottom plate 41 away from the direction-changing column 40, one end of one side plate 42 is screwed with a screw rod 44, and a push plate 43 is sleeved on the side of the screw rod 44 close to the other side plate 42, and a clamping block 26 is fixed to the side of the push plate 43 away from the screw rod 44, and another clamping block 26 with the same structure and opposite openings is fixed to the side of the other side plate 42 close to the push plate 43; by setting two clamping blocks 26 with opposite openings, the clamping area between the clamping block 26 and the seat frame is increased, the friction force is improved, the clamping is made more stable, sliding is avoided, and the welding safety is improved.

[0034] When the present invention is in use: first, according to the shape of the seat frame, a clamping method is selected. One is horizontal clamping, which keeps the turning column 40 in a horizontal state, and the other is vertical clamping, which pulls out the turning column 40, rotates the turning column 40 along the arc groove 504 to the turning hole 2 503, sends the turning column 40 away, and under the action of the reset spring 45, the turning column 40 falls to the bottom and is fixed, and then according to the size of the seat frame, the screw 1 23 is rotated to adjust the distance between the two loading columns 4 to ensure that the clamping block 26 can clamp the seat frame; then according to the height of the operator, the winding shaft 6 is rotated, the chain belt 27 is wound or released, and the height of the loading shaft 29 is adjusted to adapt the height of the seat frame to the operator; when welding, the limit plate 15 can be lifted and the turntable 7 can be rotated to change the welding angle of the seat frame accordingly, thereby improving the welding accuracy.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A welding clamping and fixing device for a car seat frame, comprising a working base plate (1), characterized in that: A bearing column is inserted and fixed at the center of the upper surface of the working base plate (1), and a turntable (7) is rotatably connected to the circumferential outer wall of the bearing column near the top. A support column (10) is evenly inserted and fixed to the lower surface of the turntable (7) near the circumferential edge, and a rectangular plate is welded to the bottom end of the support column (10). Blocks (12) are welded to the lower surface of the rectangular plate near both sides, and the bottom ends of the two blocks (12) are clamped to the same wheel axle (11). A roller (9) is rotatably connected to the circumferential outer wall of the wheel axle (11) near the middle. A translation mechanism is installed on the upper surface of the turntable (7) near both sides, and the translation mechanism includes a loading column (4). A lifting mechanism is installed on the inner wall of the loading column (4), and the lifting mechanism includes a loading shaft (29). A direction-changing mechanism is installed at one end of the loading shaft (29) near the middle of the turntable (7), and the direction-changing mechanism includes a direction-changing knot (5).

2. The welding clamping and fixing device for a car seat frame according to claim 1 is characterized in that: An annular wheel groove (101) is formed on the upper surface of the working base plate (1) near the bottom end of the roller (9), and the annular wheel groove (101) is adapted to the roller (9). A spring washer (13) is fixed to one end of the upper surface of the rotating disk (7) near the circumferential edge by bolts, and a contraction spring (14) is welded to the upper surface of the spring washer (13) at a position deviating from the center of the circle, and a limiting plate (15) is welded to the top end of the contraction spring (14), and the limiting plate (15) is A limit rod (2) is fixed at the center of the lower surface by bolts, and the limit rod (2) passes through the turntable (7); the upper surface of the working base plate (1) is evenly provided with limit holes (102) near the periphery of the annular wheel groove (101), and the limit holes (102) and the limit rod (2) are adapted to each other; the upper surface of the working base plate (1) is provided with scale grooves (103) near the periphery of the limit holes (102), and the scale grooves (103) and the limit holes (102) are matched to each other.

3. The welding clamping and fixing device for a car seat frame according to claim 1 is characterized in that: The translation mechanism comprises a bearing plate (3), the bearing plates (3) are installed on the upper surface of the turntable (7) near both sides, and a translation groove (301) is opened near the middle of the upper surface of the bearing plate (3), and a pair of pulleys (17) are placed at the bottom of the translation groove (301) near the inner walls of both ends, the adjacent ends of the two pairs of pulleys (17) are rotatably connected to the bearing shaft, and the circumferential inner walls of the two bearing shafts are rotatably connected to the support blocks (21) near the middle, the top ends of the two support blocks (21) are fixed with the same pad (8) by bolts, and the upper surface of the pad (8) is welded with a loading column (4).

4. The welding clamping and fixing device for an automobile seat frame according to claim 3 is characterized in that: The bottom of the translation groove (301) is fixed with a limit plate (25) by bolts near the pulleys (17) at both ends, and a pair of process holes (2501) are opened at the adjacent ends of the two limit plates (25), and the two bearing shafts pass through the process holes (2501). The upper surface of the bearing plate (3) is opened with a slide groove (302) near both ends, and the lower surface of the pad (8) is welded with a support slider (16) near the middle of both ends, and the support slider (16) and the slide groove (302) are adapted to each other.

5. The welding clamping and fixing device for a car seat frame according to claim 4 is characterized in that: A baffle (24) is welded to adjacent ends of the two limit plates (25) near both sides, a screw rod (23) is screwed to the middle of one side of the baffle plate (24) away from the rotating disk (7), and a push plate (22) is rotatably connected to the circumferential outer wall of the screw rod (23) near the support block (21), a positioning rod (19) is inserted into the middle of one side of the other baffle plate (24), and a pad (18) is welded to one end of the positioning rod (19) near the support block (21), and a support spring (20) is welded to the side of the pad (18) near the positioning rod (19) deviating from the center of the circle.

6. The welding clamping and fixing device for a car seat frame according to claim 1 is characterized in that: The lifting mechanism comprises a loading shaft (29), a loading slot (402) is formed at the top of the loading column (4), and a hanging plate (28) is clamped at one side of the top of the loading column (4), a winding shaft (6) is rotatably connected to the inner wall of the loading slot (402) near the top of both sides, and a chain belt (27) is connected to the circumferential outer wall of the winding shaft (6), the other end of the chain belt (27) and the hanging plate (28), the inner walls of the top of both sides of the loading slot (402) are connected to the winding shaft (6), and the chain belt (27) is connected to the hanging plate (28). A guide rod (35) is inserted into one end of the wall away from the hanging plate (28), and the circumferential outer wall of the guide rod (35) is rotatably connected to a sleeve (36), and movable holes (401) are opened near the middle of the inner walls on both sides of the installation groove (402), and the inner wall of the movable hole (401) is slidably connected to a loading shaft (29), and the circumferential inner wall of the loading shaft (29) is rotatably connected to a toothed disc (31) near the middle, and the toothed disc (31) and the chain belt (27) are meshed.

7. The welding clamping and fixing device for a car seat frame according to claim 6 is characterized in that: A counterweight ring (30) is sleeved and fixed at one end of the circumferential outer wall of the loading shaft (29) away from the rotating disk (7), a ratchet (32) is sleeved and fixed at one end of the circumferential outer wall of the winding shaft (6) close to the counterweight ring (30), and a fixing column (33) is inserted into the outer wall of one side of the loading column (4) close to the ratchet (32), and a ratchet pawl (34) is rotatably connected to the circumferential outer wall of the fixing column (33), and the ratchet pawl (34) and the ratchet (32) match.

8. The welding clamping and fixing device for a car seat frame according to claim 7 is characterized in that: The direction-changing mechanism comprises a direction-changing knot (5), an end of the circumferential outer wall of the loading shaft (29) away from the counterweight ring (30) is rotatably connected with the direction-changing knot (5), and a direction-changing hole (501) is provided on the side of the direction-changing knot (5) away from the loading shaft (29), and a plug hole (502) is provided on the side of the direction-changing knot (5) close to the loading shaft (29), and the plug hole (502) is adapted to the loading shaft (29), a loading rod (47) is fixed at the bottom of the direction-changing hole (501), and a movable shaft (37) is inserted at the ends of the outer walls of both ends of the loading rod (47) away from the loading shaft (29), and a connecting plate is rotatably connected to the circumferential outer wall of the movable shaft (37) near both ends. (38), the same connecting disk (39) is welded on one side of the two connecting plates (38) away from the loading shaft (29), and a reset spring (45) is welded on the middle part of the side of the connecting disk (39) away from the connecting plate (38), and the end of the reset spring (45) away from the connecting plate (38) is connected to a change column (40), a reset groove (4001) is opened in the middle part of the side of the change column (40) close to the connecting plate (38), and the reset groove (4001) and the reset spring (45) are adapted to each other, and a sliding rod (46) is evenly welded on the side of the change column (40) close to the connecting plate (38) near the circumferential edge, and the sliding rod (46) passes through the connecting plate (38).

9. The welding clamping and fixing device for a car seat frame according to claim 8, characterized in that: A second direction-changing hole (503) is formed at the top of the direction-changing knot (5) near the movable shaft (37), and an arc-shaped groove (504) is formed at the side of the top of the direction-changing knot (5) away from the insertion hole (502), and the arc-shaped groove (504) matches the direction-changing column (40).

10. The welding clamping and fixing device for a car seat frame according to claim 9, characterized in that: The side of the direction-changing column (40) away from the direction-changing knot (5) is fixed with a bottom plate (41) by bolts, and the side of the bottom plate (41) away from the direction-changing column (40) is welded with side plates (42) near both ends, one end of one of the side plates (42) is screwed with a second screw rod (44), and the side of the second screw rod (44) close to the other side plate (42) is sleeved with a push plate (43), and the side of the push plate (43) away from the second screw rod (44) is fixed with a clamping block (26), and the side of the other side plate (42) close to the push plate (43) is fixed with another clamping block (26) with the same structure and opposite opening.

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