Electric automobile seat spring joint spot welding device

Abstract

This invention discloses a spot welding device for splicing electric vehicle seat suspension springs, belonging to the field of electric vehicle seat technology. It mainly includes a platform, a welding assembly, and auxiliary components. The auxiliary components include a mounting plate, a connecting block mounted on the bottom of the mounting plate, a rotating shaft rotatably mounted on the mounting plate, a large gear connected to the rotating shaft, at least two sets of sliding grooves on the large gear, sliding rods slidably arranged inside the sliding grooves, a connecting handle mounted on the sliding rod, one end of the connecting handle connected to an arc-shaped plate, a rotating rod rotatably mounted on the mounting plate, an upper gear mounted at the top of the rotating rod, the upper gear meshing with the large gear, a driving part is provided on the platform, and a moving part is provided on the connecting block. This electric vehicle seat suspension spring splicing spot welding device, through the setting of the auxiliary components, can demold the welded suspension spring as a whole from the punch column, preventing the bent part of the suspension spring from getting stuck on the punch column, achieving the effect of assisting in the demolding of the welded suspension spring.

Description

Technical Field

[0001] This invention relates to the field of electric vehicles, specifically to the field of electric vehicle seat technology, and more specifically to an electric vehicle seat suspension spring splicing and spot welding device. Background Technology

[0002] Electric vehicle seat suspension springs (often called serpentine springs in the industry) are the core steel wire spring components in the seat cushion / backrest responsible for elastic support, load bearing, and vibration damping. They are shaped like continuous S-shaped waves. During the manufacturing process of the suspension springs, splicing and spot welding are required to meet the width of the entire vehicle seat. The equipment for welding suspension springs belongs to the electric vehicle related field. The patent with announcement number CN213053220U specifically discloses a special machine for spot welding seat springs. The machine uses a four-axis linkage servo worktable to send the workpiece to the predetermined spot welding position, and the spot welding machine completes the weld on the plane according to the preset path. After the welding is completed, the workpiece is sent away from the welding area by the servo worktable. Although the above process can achieve welding of the workpiece, during the welding process, because the serpentine spring is wavy, it is necessary to use a punch to hold the bent part of the serpentine spring into the punch during positioning. Then, multiple sets of serpentine springs are spliced ​​together by connecting rods and spot welded to form a grid-like suspension spring as a whole. However, because the bent part of the serpentine spring has a certain degree of toughness, it will elastically hold the punch column. As a result, after multiple serpentine springs are welded into a whole suspension spring, each serpentine spring restrains the others and cannot be released one by one, making it difficult to remove. If too much force is applied, the suspension spring may be bent. Therefore, it is necessary to provide an electric vehicle seat suspension spring splicing and spot welding device to solve the above problems. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an electric vehicle seat suspension spring splicing spot welding device to achieve the effect of assisting in the demolding of the suspension spring after welding.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is: an electric vehicle seat suspension spring splicing and spot welding device, comprising: platform; A welding assembly, which is mounted on the platform; An auxiliary component, which is set up on the platform, includes: The installation plate is set on the platform, with a connecting block installed at the bottom of the installation plate and a rotating shaft mounted on the installation plate. A large gear, which is connected to a rotating shaft, has at least two sets of sliding grooves on it; At least two sets of slide rods are slidably disposed inside corresponding slide grooves, and connecting handles are installed on the slide rods; At least two sets of curved plates, each curved plate being connected to one end of a corresponding connecting handle; A rotating rod is rotatably mounted on a mounting plate, and an upper gear is mounted at the top of the rotating rod, which meshes with a large gear. A drive unit, which is mounted on the platform, is adapted to drive the rotating rod to rotate. A movable part is provided on the connecting block, and the movable part is adapted to drive the installation disk to move.

[0005] Furthermore, the drive unit includes a mounting bracket installed at the bottom of the platform, on which a lead screw is rotatably mounted, and a motor is mounted on the mounting bracket, with the output end of the motor connected to the lead screw.

[0006] Furthermore, a slider is threaded onto the lead screw, and a movable groove is provided on the mounting bracket, with part of the slider slidingly disposed inside the movable groove.

[0007] Furthermore, the mounting bracket is equipped with two sets of support plates, on which slides are mounted. A moving block is slidably mounted on the slide, and a locking block is mounted on the moving block. A second spring is provided between the locking block and the slide, and an upper push rod is mounted on the slider.

[0008] Furthermore, a rack is installed on the top of the moving block, and a lower gear is installed at the bottom of the rotating rod, with the rack meshing with the lower gear.

[0009] Furthermore, the movable part includes a through groove formed on the platform, a connecting block slidably disposed inside the through groove, the bottom of the connecting block slidably disposed on the mounting bracket, and a first spring is provided between the connecting block and the mounting bracket.

[0010] Furthermore, a fixing block is installed on one side of the connecting block, and a lower push rod is installed on one side of the slider, with the lower push rod located below the upper push rod.

[0011] Furthermore, the movable block has a groove, the locking block is slidably disposed inside the groove, a third spring is provided between the locking block and the groove, a limit block is installed on the slide block, the limit block has a first inclined surface, and the locking block has a second inclined surface.

[0012] Furthermore, a base is installed on the platform, and a support plate is hinged to the base. One end of the support plate has a hook portion, and the end of the hook portion has a transition slope for being pressed down by contact. A return spring is connected between the other end of the support plate and the base.

[0013] Furthermore, the welding assembly includes at least two sets of punches mounted on the top of the platform, at least two sets of positioning molds mounted on the platform, the positioning molds having slots, a bracket mounted on the top of the platform, a robot arm mounted on the bracket, the robot arm having a spot welding gun, wherein at least one punch has a notch adapted to the mounting plate, and at least two sets of clamps mounted on the platform.

[0014] By adopting the above technical solution, the present invention has the following beneficial effects: The electric vehicle seat suspension spring splicing spot welding device provided in this application can, through the setting of auxiliary components, demold the welded suspension spring as a whole from the punch column, avoid the bent part of the suspension spring getting stuck on the punch column, and achieve the effect of assisting the demolding of the suspension spring after welding.

[0015] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0016] Figure 1 This is an overall schematic diagram of an electric vehicle seat suspension spring splicing and spot welding device according to this application; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 2 Enlarged view of point B in the middle; Figure 4 for Figure 1 A cross-sectional view of the entire structure; Figure 5 for Figure 4 Enlarged view of point C in the middle; Figure 6 for Figure 4 Enlarged view of point D in the middle; Figure 7 for Figure 6 Enlarged view of point E in the middle; Figure 8 for Figure 6 Enlarged view of point F in the middle; Figure 9 for Figure 6 A cross-sectional view of the central section as a whole; Figure 10 for Figure 9 Enlarged view of point G in the middle; Figure 11 for Figure 6 Another perspective view of the central part as a whole; Figure 12 for Figure 11 Enlarged view of point H in the middle; The following are the labeling elements in the figure: 1. Platform; 2. Welding components; 21. Bracket; 22. Robotic arm; 23. Fixture; 24. Punch pillar; 25. Positioning mold; 26. Slot; 3. Auxiliary components; 31. Base; 32. Support plate; 33. Hook; 331. Transition slope; 341. Moving part; 34. Through groove; 35. Mounting plate; 36. Arc plate; 361. Connecting handle; 362. Slide rod; 37. Slide groove; 38. Large gear; 39. Upper gear; 4. Rotating rod; 41. Lower gear; 42. Rack; 43. Drive unit; 431. Mounting bracket; 44. Slider; 45. Fixing block; 46. Lead screw; 47. Connecting block; 48. First spring; 49. Support plate; 5. Slide; 51. Limiting block; 52. First inclined surface; 53. Moving block; 54. Locking block; 55. Second inclined surface; 56. Upper push rod; 57. Second spring; 58. Third spring; 59. Groove; 6. Lower push rod. Detailed Implementation

[0017] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0018] Example 1: As Figure 1 As shown, in the prior art, the electric vehicle seat suspension spring can be welded together from multiple parallel serpentine springs and multiple parallel connecting rods, wherein the parallel direction of the serpentine springs and the parallel direction of the connecting rods are perpendicular to each other, such as... Figures 1-2 As shown, this application provides a spot welding device for splicing electric vehicle seat suspension springs. This spot welding device belongs to the field of electric vehicle related equipment and includes a platform 1. The platform 1 is equipped with a welding component 2, which is suitable for welding the suspension springs. Specifically: The welding assembly 2 includes multiple sets of punches 24 fixedly installed on the top of the platform 1, so that during welding, the bent part of the serpentine spring to be welded is clamped on the punches 24 for positioning. Multiple positioning molds 25 are fixedly installed on platform 1. Each positioning mold 25 has a slot 26. Multiple clamps 23 are fixedly installed on platform 1. The slot 26 is arranged parallel to the bending part of the serpentine spring, so that the connecting rod to be welded can be placed into the slot 26 from top to bottom, so that it can be spliced ​​with multiple serpentine springs to form a mesh-like suspension spring whole, and clamped and positioned by the clamps 23 during spot welding. A bracket 21 is fixedly installed on the top of the platform 1, and a robot arm 22 is installed on the bracket 21. The robot arm 22 has a spot welding gun suitable for spot welding. Driven by the robotic arm 22, the spot welding gun moves to the joint of the connecting rod and multiple sets of serpentine springs to perform welding, thereby forming a suspension spring.

[0019] In this embodiment, the robotic arm 22 is a multi-axis robotic arm, which is existing technology and will not be described in detail in this embodiment.

[0020] Example 2: Although the above process can splice and weld the suspension springs, during welding, because the bent part of the serpentine spring has a certain toughness, the bent part of the serpentine spring will elastically hug the punch post 24. As a result, after multiple sets of serpentine springs are welded into a suspension spring as a whole, each serpentine spring restrains the others and cannot be released one by one, so it is difficult to remove. If too much force is applied, the suspension spring may be bent. To solve this problem, such as Figures 2-5 As shown, an auxiliary component 3 is provided on platform 1. This auxiliary component 3 is used to assist the demolding operation of the welded suspension spring to prevent jamming with the punch post 24 due to welding deformation. Specifically: The auxiliary component 3 includes a mounting plate 35 mounted on the platform 1, and a notch adapted to the mounting plate 35 is provided at the bottom of a portion of the punch post 24 therein; In this embodiment, the number of mounting discs 35 can be set as needed, and the corresponding number of punches 24 with notches can be set accordingly.

[0021] It should be noted that, in the initial state, the mounting plate 35 is located inside the corresponding notch, and the outer diameter of the mounting plate 35 can be slightly smaller than the outer diameter of the punch 24. In the initial state, the serpentine spring is positioned by the punch 24. like Figure 4 , Figure 6 and Figure 9 As shown, a rotating rod 4 is rotatably mounted on the mounting plate 35. An upper gear 39 is fixedly mounted on the top of the rotating rod 4, and a rotating shaft (not shown in the figure) is rotatably mounted on the top of the mounting plate 35. A large gear 38 is fixedly mounted on the rotating shaft. The upper gear 39 and the large gear 38 are meshed together, so that when the rotating rod 4 rotates, it can drive the upper gear 39 to rotate and drive the large gear 38 to rotate. Continue to refer to Figure 9 Multiple sets of connecting handles 361 are radially slidably arranged on the mounting plate 35. The connecting handles 361 are located below the large gear 38 and away from the large gear 38. An arc-shaped plate 36 is provided at the outer end of the connecting handle 361, and a sliding rod 362 is provided at the other end. At the same time, multiple sets of arc-shaped sliding grooves 37 are opened on the large gear 38. One end of the sliding groove 37 is close to the center of the large gear 38, and the other end is away from the center of the large gear 38. Thus, when the large gear 38 rotates, it will drive the slide bar 362 to move from the end of the slide groove 37 near the center to the end of the slide groove 37 away from the center, and drive the connecting handle 361 to move radially away from the center, thereby driving the arc plate 36 to move outward. It should be noted that in the initial state, the slide bar 362 is located at the end of the slide groove 37 near the center. At this time, the arc plate 36 is flush with the outer ring of the mounting plate 35. Thus, when the serpentine spring to be welded is placed on the platform 1 and positioned by the punch column 24, the bent part of the serpentine spring can correspond to the outer ring of the arc plate 36. Welding is then carried out. After welding is completed, the large gear 38 can be driven to rotate and the arc plate 36 can be moved, thereby opening the bent part of the serpentine spring to a certain degree of curvature. To drive the large gear 38 to rotate, continue to refer to... Figure 9 At the bottom of the platform 1, there is a drive unit 43 corresponding to multiple sets of mounting plates 35. The drive unit 43 includes a mounting bracket 431 fixedly installed at the bottom of the platform 1, and a lead screw 46 is rotatably mounted on the mounting bracket 431. Meanwhile, a motor (not shown in the figure) is fixedly installed on the mounting bracket 431. The output end of the motor is connected to the lead screw 46, so that the lead screw 46 is driven to rotate on the mounting bracket 431 under the drive of the motor. Furthermore, a slider 44 is threadedly mounted on the lead screw 46, and a moving groove adapted to the slider 44 is provided on the mounting bracket 431; It should be noted that, in the initial state, slider 44 is at the leftmost end of mounting bracket 431 ( Figure 9 As shown), when the lead screw 46 rotates, it drives the slider 44 to move from the left end to the right end of the mounting bracket 431, and its movement direction is restricted by the moving groove. For ease of explanation, the position of slider 44 when it is at the left end of the mounting bracket 431 is defined as the initial position, and the position of slider 44 when it is moved to the right end of the mounting bracket 431 is defined as the end position. Continue to refer to Figures 6-8 Two sets of support plates 49 are fixedly installed on the mounting bracket 431. A slide block 5 is fixedly installed on the support plate 49. A moving block 53 is slidably arranged on the slide block 5. A locking block 54 is installed on the moving block 53. A second spring 57 is provided between the moving block 53 and the slide block 5. An upper push rod 56 adapted to the locking block 54 is fixedly installed on the slider 44. Thus, when the slider 44 moves, it will drive the upper push rod 56 to move until the upper push rod 56 contacts the locking block 54 and drives the locking block 54 to move. At this time, the second spring 57 is stretched. A rack 42 is fixedly installed on the top of the moving block 53, and a lower gear 41 is fixedly installed at the bottom of the rotating rod 4. The rack 42 can mesh with the lower gear 41. It should be noted that when the slider 44 is in the initial position, the upper push rod 56 is away from the block 54, and the right end of the rack 42 is not engaged with the lower gear 41; Therefore, when the serpentine spring is welded, the large gear 38 needs to be driven to rotate, and the arc plate 36 needs to be driven to open the bent part of the serpentine spring. The motor drives the lead screw 46 to rotate, which drives the slider 44 to move. This drives the rack 42 to move through the upper push rod 56 and the locking block 54, while the second spring 57 is stretched. During the movement, the rack 42 will mesh with the lower gear 41, and as the rack 42 continues to move, it will drive the lower gear 41 to rotate. At this time, the lower gear 41 will drive the rotating rod 4 to rotate, and drive the upper gear 39 to rotate, thereby driving the large gear 38 to rotate. At this time, the slide rod 362 moves from the end of the slide groove 37 near the center to the end away from the center, thereby driving the connecting handle 361 and the arc plate 36 to extend out of the mounting plate 35, thereby opening up the bent part of the serpentine spring. like Figures 5-12 As shown, a movable part 341 is provided on the corresponding mounting plate 35. The movable part 341 is adapted to drive the mounting plate 35 to move, thereby driving the serpentine spring to move after the arc plate 36 expands the serpentine spring. The moving part 341 includes a through slot 34 formed on the platform 1. It should be noted that the rotating rod 4 passes through the through slot 34, so that the rotation of the rotating rod 4 will not be affected. A connecting block 47 is slidably disposed inside the through groove 34. The bottom of the connecting block 47 is slidably disposed on the mounting bracket 431, and a first spring 48 is disposed between the connecting block 47 and the mounting bracket 431. Continue to refer to Figures 6-9 A fixing block 45 is fixedly installed on one side of the connecting block 47, and a lower push rod 6 is fixedly installed on one side of the slider 44. Figure 12 As shown), the lower push rod 6 is located below the upper push rod 56, and when the slider 44 is in the initial position, the lower push rod 6 is away from the fixed block 45; As the slider 44 moves from the initial position to the end position, it will first drive the locking block 54 to move via the upper push rod 56, thereby driving the rack 42 to move and driving the lower gear 41 to rotate, thereby driving the arc plate 36 to extend out of the mounting plate 35 and open up the bent part of the serpentine spring. When the rack 42 moves to the left end of the rack 42 and meshes with the lower gear 41, the arc plate 36 moves to the maximum distance. At this time, the slider 44 drives the lower push rod 6 to abut against the fixed block 45. The slider 44 continues to move, which in turn drives the connecting block 47 to slide inside the through groove 34, and drives the mounting plate 35 to move, which in turn drives the spread serpentine spring to move. At this time, the connecting block 47 compresses the first spring 48. Continue to refer to Figure 7 , Figure 10A groove 59 adapted to the locking block 54 is provided on the moving block 53. The locking block 54 is slidably disposed inside the groove 59, and a third spring 58 is provided between the locking block 54 and the groove 59. Meanwhile, a limiting block 51 is fixedly installed on the slide block 5. The limiting block 51 is provided with a first inclined surface 52, and a second inclined surface 55 adapted to the first inclined surface 52 is provided on the locking block 54. It should be noted that when the slider 44 is in the initial position, the second inclined surface 55 is away from the first inclined surface 52, and the first inclined surface 52 is located in the latter half of the stroke of the slider 44 from the initial position to the end position. Thus, when the slider 44 drives the fixed block 45 to move via the lower push rod 6, it drives the serpentine spring in the open state to move, and when it moves to the second half of the stroke (at this time, the bent part of the serpentine spring is away from the punch 24). The locking block 54 will contact the limiting block 51. At this time, the second inclined surface 55 will contact the first inclined surface 52. Under the pressure of the first inclined surface 52, the locking block 54 will shrink into the groove 59. When the locking block 54 is completely shrunken into the groove 59, the upper push rod 56 loses its resistance to the locking block 54. At this time, under the action of the restoring force of the second spring 57, the moving block 53 resets and drives the rack 42 to reset. At this time, the rack 42 drives the lower gear 41 to reverse, and drives the large gear 38 to reverse through the rotating rod 4 and the upper gear 39. At this time, the arc plate 36 shrinks, which causes the part of the serpentine spring that was stretched to shrink back due to its own elasticity. At this time, the worker can take the suspension spring and pull the suspension spring radially outward along the outer diameter of the punch column 24.

[0022] Example 2: To facilitate automatic demolding of the welded serpentine spring, the following structure is also included based on Example 1: (e.g.) Figures 2-3 As shown, at least one base 31 is fixedly installed on the platform 1. A support plate 32 is hinged to the base 31. One end of the support plate 32 has a hook portion 33. The end of the hook portion 33 has a transition slope 331 suitable for contacting the bent portion of the serpentine spring to compress the hook portion 33. A return spring is connected between the other end of the support plate 32 and the base 31.

[0023] In the initial state, the hook portion 33 is in a raised state. The transition slope 331 corresponds to the bent portion of the serpentine spring. Thus, when the serpentine spring in the extended state moves, before the second slope 55 and the first slope 52 come into contact, the extended serpentine spring will first come into contact with the transition slope 331 of the hook portion 33. At this time, the bent portion of the serpentine spring will squeeze the transition slope 331, causing the hook portion 33 to press down and stretch the return spring. When the part of the serpentine spring that comes into contact with the hook portion 33 passes the hook portion 33, the hook portion 33 returns to its original position under the action of the return force of the return spring, so as to lift the serpentine spring. At the same time, the second inclined surface 55 contacts the first inclined surface 52, and as it continues to move, the block 54 is squeezed into the groove 59, the arc plate 36 contracts, and the part of the serpentine spring that was stretched out contracts and recovers due to its own elasticity. At this time, the starting screw 46 drives the slider 44 back to the initial position, and the connecting block 47 resets under the action of the restoring force of the first spring 48. Under the action of the hook part 33, the serpentine spring separates from the arc plate 36, and the suspension spring after being separated from the arc plate 36 is lifted by the support plate 32. When the mounting plate 35 and the punch 24 abut, the slider 44 continues to reset. At this time, the upper push rod 56 will contact the second inclined surface 55 and press the second inclined surface 55 again to drive the clamping block 54 into the groove 59 until the upper push rod 56 moves to one side of the clamping block 54, ready for the next demolding.

[0024] It should be noted that the end of the upper push rod 56 has a pressing slope (not shown in the figure) that is adapted to the second inclined surface 55, so that the upper push rod 56 can move more smoothly when it comes into contact with the second inclined surface 55.

[0025] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A spot welding device for splicing electric vehicle seat suspension springs, characterized in that: include: Platform (1); Welding assembly (2), which is disposed on the platform (1); Auxiliary component (3), which is disposed on the platform (1), includes: Mounting plate (35), which is mounted on the platform (1), has a connecting block (47) mounted on the bottom of the mounting plate (35), and a rotating shaft is rotatably mounted on the mounting plate (35); A large gear (38) is connected to a rotating shaft, and at least two sets of sliding grooves (37) are provided on the large gear (38). At least two sets of slide rods (362) are slidably disposed inside the corresponding slide groove (37), and a connecting handle (361) is installed on the slide rod (362). At least two sets of arc-shaped plates (36) are connected to one end of the corresponding connecting handle (361); Rotary rod (4), which is rotatably mounted on the mounting plate (35), with an upper gear (39) mounted on the top of the rotary rod (4), and the upper gear (39) meshing with the large gear (38); A drive unit (43) is disposed on the platform (1) and the drive unit (43) is adapted to drive the rotating rod (4) to rotate; A movable part (341) is disposed on the connecting block (47) and is adapted to drive the mounting plate (35) to move.

2. The electric vehicle seat suspension spring splicing and spot welding device according to claim 1, characterized in that: The drive unit (43) includes a mounting bracket (431) installed at the bottom of the platform (1), on which a lead screw (46) is rotatably mounted, and on which a motor is mounted, with the output end of the motor connected to the lead screw (46).

3. The electric vehicle seat suspension spring splicing and spot welding device according to claim 2, characterized in that: A slider (44) is threaded onto the lead screw (46), and a movable groove is provided on the mounting bracket (431). Part of the slider (44) is slidably disposed inside the movable groove.

4. The electric vehicle seat suspension spring splicing and spot welding device according to claim 3, characterized in that: Two sets of support plates (49) are installed on the mounting bracket (431). A slide block (5) is installed on the support plate (49). A moving block (53) is slidably arranged on the slide block (5). A locking block (54) is installed on the moving block (53). A second spring (57) is provided between the locking block (54) and the slide block (5). An upper push rod (56) is installed on the slider (44).

5. The electric vehicle seat suspension spring splicing spot welding device according to claim 4, characterized in that: A rack (42) is mounted on the top of the moving block (53), and a lower gear (41) is mounted on the bottom of the rotating rod (4). The rack (42) meshes with the lower gear (41).

6. The electric vehicle seat suspension spring splicing spot welding device according to claim 5, characterized in that: The moving part (341) includes a through groove (34) opened on the platform (1), the connecting block (47) is slidably disposed inside the through groove (34), the bottom of the connecting block (47) is slidably disposed on the mounting bracket (431), and a first spring (48) is provided between the connecting block (47) and the mounting bracket (431).

7. The electric vehicle seat suspension spring splicing spot welding device according to claim 6, characterized in that: A fixing block (45) is installed on one side of the connecting block (47), and a lower push rod (6) is installed on one side of the slider (44). The lower push rod (6) is located below the upper push rod (56).

8. The electric vehicle seat suspension spring splicing spot welding device according to claim 7, characterized in that: The movable block (53) has a groove (59) and the locking block (54) is slidably disposed inside the groove (59). A third spring (58) is provided between the locking block (54) and the groove (59). A limit block (51) is installed on the slide (5). A first inclined surface (52) is provided on the limit block (51) and a second inclined surface (55) is provided on the locking block (54).

9. The electric vehicle seat suspension spring splicing spot welding device according to claim 8, characterized in that: A base (31) is mounted on the platform (1), and a support plate (32) is hinged on the base (31). One end of the support plate (32) has a hook (33), and the end of the hook (33) has a transition slope (331) for being pressed down by contact. A return spring is connected between the other end of the support plate (32) and the base (31).

10. The electric vehicle seat suspension spring splicing spot welding device according to claim 9, characterized in that: The welding assembly (2) includes at least two sets of punches (24) mounted on the top of the platform (1), and at least two sets of positioning molds (25) are also mounted on the platform (1). The positioning molds (25) have slots (26) on them. A bracket (21) is mounted on the top of the platform (1), and a robot (22) is mounted on the bracket (21). The robot (22) has a spot welding gun. At least one of the punches (24) has a notch that matches the mounting plate (35). At least two sets of clamps (23) are mounted on the platform (1).

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