Electric automobile air pressure rod welding device

Abstract

The invention provides an electric automobile air pressure rod welding device which comprises a base, a rotating ring seat arranged on the base, a plurality of placing tables arranged on the rotating ring seat in the circumferential direction, a three-jaw chuck arranged on each placing table and used for clamping an air pressure rod connecting rod piece, and a supporting column arranged in the center of the base. A top seat is arranged at the top of the supporting column, a sliding groove is formed in the top seat, a movable seat is arranged in the sliding groove in a sliding mode, the clamping mechanism is arranged on the movable seat, the clamping mechanism comprises two clamping plates, two sliding rails and a clamping air cylinder, one clamping plate is fixedly connected with the movable seat, the other clamping plate is arranged on the two sliding rails in a sliding mode, and the clamping air cylinder is fixedly connected with the movable seat. By means of the rotary welding device, the problem that in the prior art, stable jacking and positioning of a workpiece and stable implementation of rotary welding are difficult to achieve at the same time, and consequently the consistency of welding seams and the production takt are difficult to guarantee at the same time is solved. The rotary welding device solves the problem that in the prior art, stable jacking and positioning of the workpiece and stable implementation of rotary welding are difficult to achieve at the same time.

Description

Technical Field

[0001] This invention relates to the field of pneumatic rod welding, and more particularly to a pneumatic rod welding apparatus for electric vehicles. Background Technology

[0002] As a commonly used support / opening component in electric vehicles and related equipment, the end structure of a pneumatic strut typically requires a reliable connection between the connecting rod and the lifting ring to facilitate assembly with the hinge points of the vehicle or mechanism. This type of connection usually employs welding to form a fixed connection. To meet stress and lifespan requirements, the weld seam generally needs to have good continuity and uniformity. In actual production, a circumferential welding process is often used, where the workpiece moves circumferentially relative to the welding torch during the welding process to form a ring-shaped weld seam.

[0003] Under existing production equipment or tooling conditions, the welding process of connecting rods and lifting rings must not only ensure that the two are aligned before welding and that there is no relative displacement during welding, but also achieve stable rotary welding motion during welding, and minimize clamping and repositioning time to meet the production line cycle requirements. However, in the welding process of connecting rods and lifting rings, it is difficult to simultaneously ensure the stable clamping and positioning of the workpiece and the smooth realization of rotary welding, resulting in the inability to guarantee weld consistency and production cycle at the same time.

[0004] Therefore, it is necessary to provide a new electric vehicle pneumatic rod welding device to solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a welding device for electric vehicle pneumatic rods, which solves the problem that existing technologies struggle to simultaneously ensure both stable workpiece clamping and positioning and smooth rotary welding, leading to difficulties in guaranteeing weld consistency and production cycle time.

[0006] The electric vehicle pneumatic rod welding device provided by the present invention includes a base; A rotating ring seat is provided on the base, and several placement platforms are provided on the rotating ring seat along the circumferential direction. Each placement platform is provided with a three-jaw chuck for clamping the pneumatic rod connecting rod. A support column is located at the center of the base. A top seat is provided on the top of the support column. A sliding groove is provided on the top seat, and a movable seat is slidably disposed in the sliding groove. The clamping mechanism is provided on the movable seat. The clamping mechanism includes two clamping plates, two slide rails and a clamping cylinder. One clamping plate is fixedly connected to the movable seat, and the other clamping plate is slidably arranged on the two slide rails. The output end of the clamping cylinder is connected to the other clamping plate and is used to clamp the lifting ring to be welded to the connecting rod. A welding assembly located on one side of the rotating ring seat is used for welding the lifting ring and the connecting rod. An embedded frame is installed above the welding assembly. A clamping cylinder is installed on the embedded frame. The output end of the clamping cylinder is equipped with a tail needle, which is used to clamp and position the lifting ring at the welding station.

[0007] In a preferred embodiment, the placement platform is arranged in a circular array on the rotating ring seat to realize clamping and indexing of multiple workstations.

[0008] In a preferred embodiment, the two clamping plates in the clamping mechanism are arranged opposite to each other, and the clamping cylinder drives the other clamping plate to move along the slide rail to achieve clamping or loosening of the lifting ring.

[0009] In a preferred embodiment, the slide rails are disposed on the top of the movable seat and arranged parallel to each other, and another clamping plate simultaneously slides with the two slide rails to improve clamping stability.

[0010] In a preferred embodiment, the tail pin is used to axially tighten and position the lifting ring component so that the lifting ring component and the connecting rod component remain coaxial or aligned at the welding station.

[0011] In a preferred embodiment, a lead screw is provided in the slide groove, the lead screw passes through the movable seat and is threadedly connected to it, and a first motor is provided on one side of the top seat. The first motor drives the lead screw to rotate so as to move the movable seat along the slide groove.

[0012] In a preferred embodiment, the rotating ring seat is provided with a first toothed ring, the base is provided with a second motor, the output end of the second motor is provided with a first gear, the first gear meshes with the first toothed ring to drive the rotating ring seat to rotate and realize indexing and shifting.

[0013] In a preferred embodiment, a second toothed ring is provided on the outer side of the support column, a third motor is provided on the base, and a second gear is provided at the output end of the third motor. The second gear meshes with the second toothed ring to drive the support column to rotate and align the top seat to the corresponding work position.

[0014] In a preferred embodiment, the system further includes a rotating mechanism for driving the three-jaw chuck to rotate, the rotating mechanism comprising: A connecting shaft is connected to a three-jaw chuck and passes through a rotating ring seat; A first friction disc is disposed on the connecting shaft; A bracket is provided on one side of the base, and a liftable lifting seat is provided on the bracket. A lifting column is provided on the lifting seat, and a second friction disc is provided on the lifting column. A fourth motor and a drive shaft are provided below the bracket, and the drive shaft is connected to the output end of the fourth motor; The lifting seat moves upward so that the second friction disc comes into contact with the first friction disc, and the connecting shaft rotates through friction transmission, thereby driving the three-jaw chuck and the workpiece it holds to rotate and weld.

[0015] In a preferred embodiment, the bracket is provided with a guide rail, and the lifting seat slides in cooperation with the guide rail; The bracket is equipped with an electric telescopic rod, and the output end of the electric telescopic rod is connected to the lifting seat to drive the lifting seat to rise and fall. The drive shaft is equipped with a drive key, and the bottom of the lifting column is equipped with a keyway that cooperates with the drive key, so as to transmit the power of the fourth motor to the lifting column and drive the second friction disc to rotate.

[0016] The beneficial effects of this invention are: 1. By setting up a three-jaw chuck and its rotation drive structure, the present invention enables continuous and controllable rotational welding of the workpiece at the welding station, thereby forming a continuous circumferential weld between the connecting rod and the lifting ring. The weld is uniform in shape and has a stable penetration depth, which is beneficial to improving the consistency of welding quality.

[0017] 2. The clamping cylinder and tail pin are designed to axially clamp the lifting ring after the workstation reaches the welding position. This can suppress the workpiece from floating, moving, and becoming eccentric during rotary welding, thus stabilizing the position during welding and reducing the probability of welding defects.

[0018] 3. The rotating ring seat is equipped with multiple placement platforms and a three-jaw chuck, which enables multi-station cyclic processing. While welding is being carried out at one station, connecting rods can be pre-clamped at other stations, which reduces waiting time structurally and is suitable for continuous production.

[0019] 4. When the rotating ring seat rotates, the support column drives the top seat to rotate synchronously (or in coordination with the program) according to the matching angle, so that the upper clamping mechanism and the lower target station maintain a corresponding relationship, avoiding the problem of misalignment between the fixture and the workpiece station, which is conducive to improving the stability of automated operation and clamping efficiency.

[0020] 5. After the rotary welding begins at the previous station, the two clamping plates of the clamping mechanism can be promptly withdrawn and moved back by the moving seat to avoid it. At the same time, the support column can be reset in advance to the next pre-clamping station to clamp and position the next lifting ring part, realizing the parallel operation of "welding at the previous station and pre-clamping at the next station", further reducing the cycle time of a single piece and improving production efficiency. Attached Figure Description

[0021] Figure 1 The main structure of the electric vehicle pneumatic rod welding device provided by the present invention is shown in a three-dimensional view. Figure 1 ; Figure 2 for Figure 1 A magnified structural diagram of A is shown below; Figure 3 A front view of the main structure of the electric vehicle pneumatic rod welding device provided by the present invention; Figure 4 for Figure 3 A schematic diagram of the enlarged structure of B shown; Figure 5 A top view of the main structure of the electric vehicle pneumatic rod welding device provided by the present invention; Figure 6 The main structure of the electric vehicle pneumatic rod welding device provided by the present invention is shown in a three-dimensional view. Figure 2 .

[0022] The following components are labeled in the diagram: 1. Base; 2. Rotating ring seat; 3. Placement platform; 4. Three-jaw chuck; 5. Support column; 6. Top seat; 7. Slide groove; 8. Moving seat; 9. Clamping plate; 10. Slide rail; 11. Clamping cylinder; 12. Tightening cylinder; 13. Tail pin; 14. Electric telescopic rod; 15. Welding assembly; 16. Lead screw; 17. First motor; 18. First gear ring; 19. Second motor; 20. First gear; 21. Second gear ring; 22. Third motor; 23. Second gear; 24. Connecting shaft; 25. First friction disc; 26. Bracket; 27. Lifting seat; 28. Lifting column; 29. ​​Second friction disc; 30. Fourth motor; 31. Drive shaft; 32. Drive key; 33. Guide rail. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 ,in Figure 1 The main structure of the electric vehicle pneumatic rod welding device provided by the present invention is shown in a three-dimensional view. Figure 1 ; Figure 2 for Figure 1 A magnified structural diagram of A is shown below; Figure 3 A front view of the main structure of the electric vehicle pneumatic rod welding device provided by the present invention; Figure 4 for Figure 3 A schematic diagram of the enlarged structure of B shown; Figure 5 A top view of the main structure of the electric vehicle pneumatic rod welding device provided by the present invention; Figure 6 The main structure of the electric vehicle pneumatic rod welding device provided by the present invention is shown in a three-dimensional view. Figure 2 .

[0025] In the specific implementation process, such as Figures 1-6As shown, this device includes a base 1, on which a rotating ring seat 2 is mounted. The rotating ring seat 2 can rotate relative to the base 1 around its central axis. Several placement platforms 3 are evenly distributed along the circumference of the rotating ring seat 2, and a set of three-jaw chucks 4 is installed on each placement platform 3. Before processing, the operator places the connecting rod to be welded in the center of the three-jaw chuck 4 and clamps it in place. Since the placement platform 3 has a ring-shaped multi-station structure, the operator can pre-assemble and clamp multiple sets of connecting rods in non-welding stations, thereby improving cycle efficiency.

[0026] A support column 5 is set at the center of the base 1, and a top seat 6 is installed on the upper part of the support column 5. The top seat 6 can rotate around the central axis with the support column 5. A sliding groove 7 is opened on the surface of the top seat 6, and a movable seat 8 is slidably arranged in the sliding groove 7. A clamping mechanism is set on the movable seat 8 for clamping the lifting ring and realizing alignment and assembly positioning with the connecting rod below. The clamping mechanism includes two clamping plates 9, slide rails 10 and clamping cylinder 11. One clamping plate 9 is fixed on the movable seat 8, and the other clamping plate 9 slides linearly on the two parallel slide rails 10. The clamping cylinder 11 is installed on the movable seat 8 and connected to the movable clamping plate 9. When the clamping cylinder 11 extends or retracts, it drives the two clamping plates 9 to clamp or release the lifting ring, thereby realizing the rapid clamping and positioning of the lifting ring.

[0027] To enable the clamping mechanism to switch between clamping and welding avoidance, a lead screw 16 is installed in the slide groove 7, which passes through the movable seat 8 and is threadedly connected to it. A first motor 17 is installed on the side of the top seat 6, which drives the lead screw 16 to rotate, thereby causing the movable seat 8 to move forward or backward in a straight line along the slide groove 7. When it is necessary to align the lifting ring with the connecting rod below, the moving seat 8 moves forward under the drive of the lead screw 16. At this time, the operator can place the lifting ring directly above the connecting rod clamped by the corresponding three-jaw chuck 4, and then fix it by the clamping mechanism. When entering the welding stage, the movable seat 8 retracts to a clearance position to avoid obstructing the welding path of the welding assembly 15 and reduce the impact of welding spatter on the clamping mechanism.

[0028] A first toothed ring 18 is provided on the outer periphery of the rotating ring seat 2, and a second motor 19 is installed on the side of the base 1. A first gear 20 is installed at the output end of the second motor 19. The first gear 20 meshes with the first toothed ring 18 and is used to drive the rotating ring seat 2 to rotate in increments at a preset angle, so that each placement table 3 enters the assembly / welding station in sequence.

[0029] A second toothed ring 21 is provided on the outside of the support column 5, and a third motor 22 is installed on the base 1. A second gear 23 is installed at the output end of the third motor 22. The second gear 23 meshes with the second toothed ring 21 and is used to drive the support column 5 to rotate the top seat 6 around the central axis.

[0030] To ensure that the clamping mechanism and the lower three-jaw chuck 4 maintain a corresponding relationship, when the corresponding connecting rod and lifting ring are clamped, the second motor 19 drives the rotating ring seat 2 to rotate in sections, and the third motor 22 synchronously or according to the program drives the top seat 6 to perform the matching angle rotation, so that the moving seat 8 and the clamping mechanism can rotate together with the target station, ensuring that the lifting ring always corresponds to the current connecting rod station to be welded.

[0031] A welding assembly 15 is installed on one side of the rotating ring seat 2. The welding assembly 15 is used to weld the lifting ring and the connecting rod. A clamping cylinder 12 is installed at the pre-embedded frame above the welding assembly 15. A tail needle 13 is installed at the output end of the clamping cylinder 12, with the tail needle 13 facing downward and aligned with the center of the welding station. After entering the welding station, the clamping cylinder 12 presses down, and the tail needle 13 applies an axial clamping force to the lifting ring, so that the lifting ring and the connecting rod remain in close contact and stably positioned during the welding process, avoiding floating, shifting, or eccentricity during rotary welding.

[0032] Since this device is used for welding connecting rods and lifting rings, the welding station needs to form a continuous circumferential weld. Therefore, the workpiece must be driven to rotate during welding. This device uses friction drive to achieve the rotational drive of the three-jaw chuck 4. Each three-jaw chuck 4 has a connecting shaft 24 below it, which is connected to the three-jaw chuck 4 in a transmission manner. The lower end of the connecting shaft 24 is fixed to the first friction disc 25. A bracket 26 is set on one side of the base 1. A lifting seat 27 is set on the bracket 26, and a lifting column 28 is set on the lifting seat 27. The second friction disc 29 is installed on the top of the lifting column 28. A fourth motor 30 and a transmission shaft 31 are set below the bracket 26. A transmission key 32 is set on the transmission shaft 31, and a keyway is set at the bottom of the lifting column 28 to cooperate with the transmission key 32, so as to transmit the power of the fourth motor 30 to the lifting column 28 and drive the second friction disc 29 to rotate. The lifting seat 27 moves up and down under the guidance of the guide rail 33. The electric telescopic rod 14 is used to drive the lifting seat 27 to move up and down. When the electric telescopic rod 14 drives the lifting seat 27 to move upward, so that the second friction disc 29 and the first friction disc 25 are pressed into contact, the connecting shaft 24 is driven to rotate through friction transmission, thereby driving the three-jaw chuck 4 and the connecting rod clamped by it to rotate around the axis, so as to realize the rotation of the workpiece required for rotary welding.

[0033] The workflow of this invention is as follows: Pre-clamping of connecting rods: At non-welding stations, workers place the connecting rods to be welded in the center of the three-jaw chuck 4 on the placement table 3 and clamp them in place. Pre-clamping can be completed in advance at multiple stations to shorten the cycle time of a single piece.

[0034] Support column to pre-clamping station, lifting ring clamping and positioning: The third motor 22 drives the support column 5 to rotate the top seat 6 to above the target pre-clamping station; the first motor 17 drives the lead screw 16 to move the moving seat 8 along the slide groove 7 to the side close to the three-jaw chuck 4. Then, the lifting ring is placed between the two clamping plates 9, and the clamping cylinder 11 is activated to bring the two clamping plates 9 closer together to clamp the lifting ring, so that the lifting ring is directly above the corresponding connecting rod and aligned with the position to be welded.

[0035] Indexing and linkage alignment: After clamping and alignment are completed, the second motor 19 drives the rotating ring seat 2 to rotate at a preset angle through the meshing of the first gear 20 and the first gear ring 18; at the same time, the third motor 22 drives the support column 5 to drive the top seat 6 to perform synchronous or front-back rotation matching the angle, so that the moving seat 8 and the clamping mechanism always correspond to the position of the target three-jaw chuck 4, thereby ensuring that the lifting ring part always maintains an alignment relationship with the connecting rod of the position.

[0036] Entering the welding station and tightening the positioning: When the target station is rotated to the welding component 15, the tightening cylinder 12 set on the pre-embedded frame above the welding component 15 is activated, and the tail needle 13 presses down and makes tight contact with the lifting ring component, axially tightening and positioning the lifting ring component, so that the lifting ring component and the connecting rod component remain in close contact and stable during the welding process.

[0037] The essential steps for rotary welding are as follows: Since the connecting rod and the lifting ring need to form a continuous circumferential weld, the workpiece must be driven to rotate during welding; the electric telescopic rod 14 drives the lifting seat 27 to move upward, so that the second friction disc 29 and the first friction disc 25 are pressed into contact, and then the fourth motor 30 is started to drive the connecting shaft 24 to rotate, thereby driving the three-jaw chuck 4 and the workpiece to rotate; the welding assembly 15 completes continuous circumferential welding during the workpiece rotation.

[0038] As soon as welding begins, the clamping mechanism immediately retracts and resets to the next pre-assembled clamping station for parallel operation: When welding begins at the previous station, the clamping cylinder 11 drives the two clamping plates 9 to move away from each other, and at the same time the moving seat 8 moves backward along the slide groove 7 away from the welding area to avoid affecting the welding. During this period, the support column 5 can be reset to the next pre-clamping station in advance, so as to place and clamp the next lifting ring part in advance, thereby realizing the parallel cycle of "the previous station is welding and the next station is pre-clamping" and improving production efficiency.

[0039] Post-weld reset and cycle: After welding is completed, the clamping cylinder 12 retracts to release the clamping; the electric telescopic rod 14 descends to separate the two friction discs and stop rotating; the worker removes the welded workpiece at the corresponding work station; the rotating ring seat 2 is indexed again and the top seat 6 is rotated in linkage, and the above steps are repeated to achieve continuous cyclic welding.

[0040] The circuits and controls involved in this invention are all existing technologies and will not be described in detail here.

[0041] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A welding device for electric vehicle pneumatic struts, characterized in that, include Base (1); A rotating ring seat (2) is provided on the base (1). Several placement platforms (3) are provided on the rotating ring seat (2) along the circumferential direction. Each placement platform (3) is provided with a three-jaw chuck (4) for clamping the gas pressure rod connecting rod. A support column (5) is set at the center of the base (1), and a top seat (6) is set on the top of the support column (5). A sliding groove (7) is provided on the top seat (6), and a movable seat (8) is slidably arranged in the sliding groove (7). The clamping mechanism is provided on the movable seat (8). The clamping mechanism includes two clamping plates (9), two slide rails (10) and a clamping cylinder (11). One clamping plate (9) is fixedly connected to the movable seat (8), and the other clamping plate (9) is slidably disposed on the two slide rails (10). The output end of the clamping cylinder (11) is connected to the other clamping plate (9) for clamping the lifting ring to be welded to the connecting rod. The welding assembly (15) located on one side of the rotating ring seat (2) is used to weld the lifting ring and the connecting rod. An embedded frame is set above the welding assembly (15), and a clamping cylinder (12) is set on the embedded frame. The output end of the clamping cylinder (12) is provided with a tail needle (13), which is used to clamp and position the lifting ring at the welding station.

2. The electric vehicle pneumatic rod welding device according to claim 1, characterized in that, The placement platform (3) is arranged in a ring array on the rotating ring seat (2) to realize the clamping and indexing of multiple workstations.

3. The electric vehicle pneumatic rod welding device according to claim 1, characterized in that, The two clamping plates (9) in the clamping mechanism are arranged opposite to each other, and the clamping cylinder (11) drives the other clamping plate (9) to move along the slide rail (10) to achieve clamping or loosening of the lifting ring.

4. The electric vehicle pneumatic rod welding device according to claim 1, characterized in that, The slide rails (10) are located on the top of the movable seat (8) and arranged parallel to each other. The other clamping plate (9) slides with the two slide rails (10) to improve clamping stability.

5. The electric vehicle pneumatic rod welding device according to claim 1, characterized in that, The tail pin (13) is used to axially tighten and position the lifting ring so that the lifting ring and the connecting rod remain coaxial or aligned at the welding station.

6. The electric vehicle pneumatic rod welding device according to claim 1, characterized in that, The slide groove (7) is provided with a lead screw (16), which passes through the movable seat (8) and is threadedly connected to it. A first motor (17) is provided on one side of the top seat (6), which drives the lead screw (16) to rotate so as to move the movable seat (8) along the slide groove (7).

7. The electric vehicle pneumatic rod welding device according to claim 1, characterized in that, The rotating ring seat (2) is provided with a first toothed ring (18), and the base (1) is provided with a second motor (19). The output end of the second motor (19) is provided with a first gear (20). The first gear (20) meshes with the first toothed ring (18) to drive the rotating ring seat (2) to rotate and realize indexing and shifting.

8. The electric vehicle pneumatic rod welding device according to claim 1, characterized in that, The support column (5) is provided with a second toothed ring (21) on the outside, and a third motor (22) is provided on the base (1). The output end of the third motor (22) is provided with a second gear (23). The second gear (23) meshes with the second toothed ring (21) to drive the support column (5) to rotate and align the top seat (6) to the corresponding work position.

9. The electric vehicle pneumatic rod welding device according to claim 1, characterized in that, It also includes a rotating mechanism for rotating the three-jaw chuck (4), the rotating mechanism comprising: Connecting shaft (24), the connecting shaft (24) is connected to the three-jaw chuck (4) and passes through the rotating ring seat (2); The first friction disc (25) is disposed on the connecting shaft (24); A bracket (26) is provided on one side of the base (1). A liftable lifting seat (27) is provided on the bracket (26). A lifting column (28) is provided on the lifting seat (27). A second friction disc (29) is provided on the lifting column (28). The bracket (26) is provided with a fourth motor (30) and a drive shaft (31) below it, and the drive shaft (31) is connected to the output end of the fourth motor (30); The lifting seat (27) moves upward so that the second friction disc (29) contacts the first friction disc (25), and the connecting shaft (24) rotates through friction transmission, thereby driving the three-jaw chuck (4) and the workpiece it holds to rotate and weld.

10. The electric vehicle pneumatic rod welding device according to claim 9, characterized in that, The bracket (26) is provided with a guide rail (33), and the lifting seat (27) slides with the guide rail (33); The bracket (26) is provided with an electric telescopic rod (14), and the output end of the electric telescopic rod (14) is connected to the lifting seat (27) to drive the lifting seat (27) to rise and fall; The drive shaft (31) is provided with a drive key (32), and the bottom of the lifting column (28) is provided with a keyway that cooperates with the drive key (32) so as to transmit the power of the fourth motor (30) to the lifting column (28) and drive the second friction disc (29) to rotate.

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