A shell welding system based on direct current charging pile production

Abstract

The application discloses a shell welding system based on direct-current charging pile production and relates to the technical field of charging pile production. The shell welding system comprises a workbench, a plurality of pushing blocks are slidably connected to the top surface of the workbench, the bottom surface of each pushing block is fixedly connected with a driving rack, the long side of the workbench is rotatably provided with a transmission shaft, and a first gear is fixedly sleeved on the transmission shaft. The shell welding system further comprises a centering mechanism and a side pushing mechanism. The centering mechanism and the side pushing mechanism are matched to center the stand column during the movement of the stand column and the cross beam, then the cross beam is centered through the movement of the stand column, the cross beam and the stand column are quickly aligned, the required time for repeated positioning and clamping in the production process is reduced, the production efficiency is improved, the cross beam is fixed through the cooperation of the side pushing mechanism and the abutting cylinder, the stand column is fixed through the cooperation of the cross beam and the pushing cylinder, the stand column and the cross beam cannot move during welding, and the stability during welding is ensured.

Description

Technical Field

[0001] This invention relates to the field of charging pile manufacturing technology, specifically to a shell welding system for DC charging pile manufacturing. Background Technology

[0002] With the rapid development of the new energy industry, charging piles, as one of its core supporting industries, are also developing rapidly. Compared to AC charging piles, DC charging piles offer advantages such as faster charging speeds, higher charging efficiency, and better battery protection, and are replacing AC charging piles as the preferred equipment for building charging stations. As of the end of 2024, the number of new energy vehicles in China was approximately 31.4 million, while there were only about 1.64 million DC charging piles, indicating a huge equipment gap.

[0003] When manufacturing DC charging piles, a rectangular frame is first welded, then two rectangular frames are connected, and finally the side panels are installed on the frame to complete the production of the charging pile shell. At this stage, the accuracy of the welding angles of the frame is crucial. Existing methods for welding frames involve moving the adjacent ends of one profile to form a right angle at their contact points, followed by positioning and fixing with right-angle clamps to ensure the accuracy of the angle between the two profiles during subsequent welding. However, when welding four profiles into a rectangular frame, frequent disassembly, assembly, and movement of the clamps are required to determine the accuracy of the angle between the two profiles during subsequent welding. This results in a significant amount of time being spent on positioning and fixing the profiles, impacting the welding efficiency of the frame. Summary of the Invention

[0004] The purpose of this invention is to provide a casing welding system based on DC charging pile production, so as to overcome the shortcomings of the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a shell welding system based on DC charging pile production, comprising a workbench, the workbench being cross-shaped, and further comprising:

[0006] The top surface of the workbench is slidably connected to multiple push blocks, the bottom surface of the push blocks is fixedly connected to a drive rack, the long side of the workbench is rotatably mounted with a transmission shaft, and a first gear is fixedly sleeved on the transmission shaft;

[0007] The centering mechanism includes a centering bracket fixedly connected to one corner of the workbench. A fixed shaft is fixedly connected to the inner side of the centering bracket. A rotating frame is rotatably mounted on the fixed shaft. A centering frame is slidably connected to the rotating frame. A guide groove is provided on the outer side of the fixed shaft. A sliding column with one end located in the guide groove is fixedly connected inside the rotating frame.

[0008] The side-pushing mechanism includes a rotating gear, a contact frame, and a sliding frame. Two centrally symmetrical contact frames are located outside the rotating gear. When the two contact frames move relative to each other, the rotating gear drives the sliding frame to work and causes its internal push rack to extend.

[0009] Preferably, the centering mechanism further includes a first rotating shaft, which is rotatably mounted on the outer side of the worktable and perpendicular to the axis of the transmission shaft. A synchronous pulley is fixedly sleeved on the first rotating shaft, and another synchronous pulley is rotatably mounted on the fixed shaft. The two synchronous pulleys are connected by a synchronous belt drive, and the synchronous pulley on the fixed shaft is fixedly connected to the rotating frame to rotate coaxially.

[0010] Preferably, the centering mechanism further includes a reversing gear set, which includes a first helical gear fixedly sleeved on the transmission shaft and a second helical gear fixedly sleeved on the first rotating shaft. The first helical gear and the second helical gear mesh with each other and have the same number of teeth.

[0011] Preferably, during the rotation of the centering frame, the guide groove causes the centering frame to slide axially along the fixed shaft, and the centering frame is close to the synchronization wheel when it is in the default drooping state.

[0012] Preferably, during the process of rotating the centering frame from the default drooping state to the horizontal state, it slides away from the synchronous pulley; during the process of rotating the centering frame from the vertical state to the horizontal state, it slides towards the synchronous pulley; and during the process of rotating the centering frame from the horizontal state to the vertical state, there is no displacement in the axial direction of the fixed shaft.

[0013] Preferably, a first rack is fixedly connected to the inner side of the abutment frame, the first rack meshes with a rotating gear, and the abutment frame drives the rotating gear to rotate after being pushed by contacting the column.

[0014] Preferably, the inner side of the abutting frame has a telescopic rod with one end abutting against the inside of another symmetrical abutting frame, and the outer side of the sliding frame is slidably connected to a pusher, the inner side of the pusher being fixedly connected to one end of the pusher rack.

[0015] Preferably, a second rack that meshes with a rotating gear is slidably connected inside the sliding frame. One end of the second rack is connected to a second gear. The second rack drives the second gear to move linearly. A fixed rack is fixedly connected inside the sliding frame. The fixed rack meshes with the second gear. The pushing rack meshes with the second gear and slides inside the sliding frame.

[0016] Preferably, a plurality of pushing cylinders and abutting cylinders are fixedly connected to the side of the worktable. The pushing cylinders are located on the long side of the worktable, and the abutting cylinders are located on the short side of the worktable. The telescopic ends of the pushing cylinders and abutting cylinders are fixedly connected to the side of adjacent pushing blocks.

[0017] Preferably, the top surface of the workbench is provided with a straight sliding groove that limits the moving direction of the push block.

[0018] The beneficial effects of this invention are as follows:

[0019] 1. This invention, through the cooperation of the centering mechanism and the side-pushing mechanism, centers the column while pushing the column and the beam to move, and then centers the beam by moving the column, thereby quickly aligning the beam and the column, reducing the time required for repeated positioning and clamping during the production process and improving production efficiency.

[0020] 2. The side-pushing mechanism of this invention works in conjunction with the pushing cylinder and the abutting cylinder to move the column and crossbeam. After pushing the column and crossbeam, the side-pushing mechanism and the abutting cylinder fix the crossbeam in place. The limit of the crossbeam and the pressure of the pushing cylinder fix the position of the column, thereby ensuring that there is no displacement between the column and the crossbeam during the welding process, and ensuring the accuracy of the weld and welding angle.

[0021] 3. The present invention, through the cooperation between the fixed shaft and the guide slide, enables the centering frame to be away from the crossbeam by default, and to move closer to the crossbeam when rotated to the horizontal state. This avoids the centering frame remaining close to the crossbeam after centering, which would interfere with the welding process. At the same time, moving closer to the crossbeam during the rotation to the horizontal state ensures that there is sufficient contact surface between the centering frame and the column, thus ensuring the centering effect of the centering frame. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention after welding is completed;

[0023] Figure 2 This is a schematic diagram of the workbench and centering mechanism of the present invention;

[0024] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 For the present invention Figure 2 Enlarged view at point B in the middle;

[0026] Figure 5 This is a schematic diagram of the centering mechanism structure of the present invention;

[0027] Figure 6 For the present invention Figure 5Enlarged view at point C;

[0028] Figure 7 This is a schematic cross-sectional view of the structure after the central frame has been moved according to the present invention;

[0029] Figure 8 This is a schematic diagram of the fixed shaft, guide sleeve, and guide groove structure of the present invention;

[0030] Figure 9 This is a schematic diagram of the side-pushing mechanism of the present invention;

[0031] Figure 10 This is a schematic diagram of the internal structure of the sliding frame of the present invention.

[0032] In the diagram: 1. Workbench; 11. Straight slide groove; 12. Push block; 13. Drive rack; 14. Transmission shaft; 15. First gear; 2. Push cylinder; 3. Abutment cylinder; 4. Centering mechanism; 41. Centering bracket; 42. First rotating shaft; 43. Fixed shaft; 44. Synchronous belt; 45. Synchronous pulley; 46. Rotating frame; 47. Centering frame; 471. Sliding column; 48. Guide slide groove; 49. Reversing gear set; 491. First helical gear; 492. Second helical gear; 5. Side push mechanism; 51. Rotating gear; 52. Abutment frame; 521. First rack; 522. Telescopic rod; 53. Sliding frame; 531. Push frame; 532. Fixed rack; 533. Second rack; 534. Second gear; 54. Push rack. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] like Figures 1 to 10 As shown, an embodiment of the present invention provides a shell welding system for the production of DC charging piles, including a workbench 1, which is cross-shaped, and further comprising:

[0035] Multiple push blocks 12 are slidably connected to the top surface of the worktable 1, and a drive rack 13 is fixedly connected to the bottom surface of the push blocks 12. A transmission shaft 14 is rotatably mounted on the long side of the worktable 1, and a first gear 15 is fixedly sleeved on the transmission shaft 14.

[0036] The centering mechanism 4 includes a centering bracket 41 fixedly connected to one corner of the workbench 1. A fixed shaft 43 is fixedly connected to the inner side of the centering bracket 41. A rotating frame 46 is rotatably mounted on the fixed shaft 43. A centering frame 47 is slidably connected to the rotating frame 46. A guide groove 48 is provided on the outer side of the fixed shaft 43. A sliding column 471 with one end located in the guide groove 48 is fixedly connected inside the rotating frame 46.

[0037] The side-pushing mechanism 5 includes a rotating gear 51, abutting frame 52, and sliding frame 53. The two abutting frames 52, which are centrally symmetrical, are located outside the rotating gear 51. When the two abutting frames 52 move relative to each other, the rotating gear 51 drives the sliding frame 53 to work and causes the push rack 54 inside it to extend.

[0038] In this invention, by setting up a centering mechanism 4 and a side-pushing mechanism 5, after the crossbeam and column are placed on the worktable 1, the abutment cylinder 3 and the push cylinder 2 are activated in sequence, thereby pushing the crossbeam and column towards the center of the worktable 1. During the movement of the column, as the centering frame 47 rotates, the column in contact with it is pushed from both ends by the symmetrical centering frame 47 to achieve centering. At this time, the column moves to a horizontal state under the push of the push cylinder 2. When the column contacts the abutment frame 52 of the side-pushing mechanism 5, the abutment frame 52 drives the push rack 54 to extend, thereby pushing the crossbeam to fit against the push block 12 connected to the abutment cylinder 3. At the same time, under the push of the columns on both sides, the center of the crossbeam is placed on the center line of the worktable 1, thereby quickly aligning the crossbeam and column, thereby reducing the time required for repeated positioning and clamping during the production process and improving production efficiency.

[0039] To facilitate user operation, DC charging piles are typically set at a height of around 2 meters (for easy installation and maintenance), while their width and thickness are adjusted according to the size and quantity of internal components (such as the difference between single-gun and dual-gun DC charging piles).

[0040] In an embodiment of the present invention, the centering mechanism 4 further includes a first rotating shaft 42, which is rotatably mounted on the outer side of the workbench 1 and perpendicular to the axis of the transmission shaft 14. A synchronous pulley 45 is fixedly sleeved on the first rotating shaft 42, and another synchronous pulley 45 is rotatably mounted on a fixed shaft 43. The two synchronous pulleys 45 are connected by a synchronous belt 44. The synchronous pulley 45 on the fixed shaft 43 is fixedly connected to the rotating frame 46 for coaxial rotation. The centering mechanism 4 also includes a reversing gear set 49, which includes a first helical gear 491 fixedly sleeved on the transmission shaft 14 and a gear fixedly sleeved on the first rotating shaft 42. The second helical gear 492, the first helical gear 491, and the second helical gear 492 mesh with each other and have the same number of teeth. During the rotation of the centering frame 47, the guide groove 48 causes the centering frame 47 to slide axially along the fixed shaft 43. When the centering frame 47 is in the default drooping state, it is close to the synchronous pulley 45. During the rotation of the centering frame 47 from the default drooping state to the horizontal state, it slides away from the synchronous pulley 45. During the rotation of the centering frame 47 from the vertical state to the horizontal state, it slides closer to the synchronous pulley 45. During the rotation of the centering frame 47 from the horizontal state to the vertical state, there is no displacement in the axial direction of the fixed shaft 43. The vertical state refers to the vertical state in which the centering frame 47 forms a 180° angle with the default drooping state, that is, the part of the centering frame 47 in contact with the column points upward.

[0041] In this embodiment, when the centering frame 47 is driven to rotate by the transmission shaft 14, as it rotates from the default drooping state to the horizontal state, its top surface will slightly tilt upwards after contacting one end of the column, thereby sliding to the other end and abutting against the side of another centering frame 47. At this time, with the cooperation of the two centering frames 47, the column completes the centering process as it is pushed towards the center of the worktable 1.

[0042] When the centering frame 47 is driven to rotate, when it rotates from the default drooping state to the horizontal state, due to the guiding effect of the guide groove 48, the centering frame 47 will slide axially during the rotation, so that one side of the centering frame 47 is closer to the position of the crossbeam, thereby ensuring that the centering frame 47 and the column have sufficient contact area during the column's forward movement, thus stably centering the column.

[0043] As the centering frame 47 continues to rotate, after it rotates 180° from the horizontal position (completing the centering of the column), the continued rotation of the centering frame 47 will cause it to move towards the default drooping position. At this time, under the guidance of the guide groove 48, the centering frame 47 moves towards the synchronous wheel 45, thereby moving away from the crossbeam and leaving enough space for welding.

[0044] In an embodiment of the present invention, a first rack 521 is fixedly connected to the inner side of the abutment frame 52. The first rack 521 meshes with the rotating gear 51. After the abutment frame 52 is pushed by contacting the column, it drives the rotating gear 51 to rotate. A telescopic rod 522 with one end abutting against the inside of another symmetrical abutment frame 52 is fixedly connected inside the abutment frame 52. A pusher 531 is slidably connected to the outer side of the sliding frame 53. The inner side of the pusher 531 is fixedly connected to one end of the push rack 54.

[0045] In this embodiment, the telescopic rod 522 has an elastic element inside, so that it is in the extended state by default. When the push cylinder 2 pushes the column to move into the workbench 1, the telescopic rod 522 is compressed as the two abutment frames 52 move towards each other. After welding is completed, as the frame is removed from the workbench 1, the two abutment frames 52 move away from each other under the pushing action of the telescopic rod 522, thereby driving the self-rotating gear 51 to rotate in the opposite direction. Thus, under the gear and rack transmission, the push rack 54 and the push frame 531 are retracted, realizing the automatic reset of the side push mechanism 5.

[0046] Meanwhile, when welding the gap between the column and the crossbeam, the crossbeam cannot move because both sides are held in place by the abutting cylinder 3 and the pusher 531. Therefore, during welding, the side pushing mechanism 5 can also fix the crossbeam. At the same time, because the pushing cylinder 2 applies pressure to the column, and one side of the column abuts against one end of the two crossbeams, the column cannot move relative to the crossbeam under the limit of the crossbeam and the pressure applied by the pushing cylinder 2. This ensures the stability of the column and the crossbeam during the welding process, and ensures the accuracy of the weld and the angle between the column and the crossbeam.

[0047] In an embodiment of the present invention, a second rack 533 that meshes with a rotating gear 51 is slidably connected inside the sliding frame 53. One end of the second rack 533 is connected to a second gear 534. The second rack 533 drives the second gear 534 to move linearly. A fixed rack 532 is fixedly connected inside the sliding frame 53. The fixed rack 532 meshes with the second gear 534, pushing the rack 54 to mesh with the second gear 534 and slide within the sliding frame 53.

[0048] Since the second gear 534 meshes with the fixed rack 532, when the second rack 533 pushes the second gear 534 to move, the second gear 534 will rotate, thereby causing one end of the pushing rack 54 to slide out of the sliding frame 53. Since this mechanism is a displacement amplification mechanism, when the column is pushed by the pushing cylinder 2 to move, and the self-rotating gear 51 is driven to rotate by the first rack 521 on the abutment frame 52, the gear and rack meshing transmission enables the pushing rack 54 to move at a faster speed than the column. This ensures that the crossbeam can be pushed to the side of the pushing block 12 connected to the abutment cylinder 3 before the two columns clamp the crossbeam. This avoids misalignment during welding because the side of the crossbeam and the end face of the column are not on the same plane. It also ensures that the internal dimensions of the frame meet the design requirements after welding.

[0049] In an embodiment of the present invention, a plurality of pushing cylinders 2 and abutting cylinders 3 are fixedly connected to the side of the workbench 1. The pushing cylinders 2 are located on the long side of the workbench 1, and the abutting cylinders 3 are located on the short side of the workbench 1. The telescopic ends of the pushing cylinders 2 and the abutting cylinders 3 are fixedly connected to the side of the adjacent pushing block 12.

[0050] In an embodiment of the present invention, the top surface of the workbench 1 is provided with a straight slide groove 11 that defines the moving direction of the push block 12.

[0051] Working principle:

[0052] First, when placing the beam and the column, place the beam between the pusher 531 and the adjacent push block 12, and then place the column on the long side of the workbench 1. During the placement process, it is necessary to avoid one end of the beam and column being suspended too much in the air and slipping off the workbench 1.

[0053] Then, the abutment cylinder 3 is activated to extend it fully. Since the length of the column is a fixed value, it is only necessary to make the distance between the two push blocks 12 connected to the abutment cylinder 3 equal to the length of the column after the abutment cylinder 3 is fully extended on both sides. This will prevent the crossbeam from being pushed too much, which would cause the side of the crossbeam to be unable to be coplanar with the end face of the column, resulting in the internal dimensions of the frame after welding being smaller than the design dimensions. When the crossbeam is placed close to the abutment cylinder 3, it will be pushed into the worktable 1 by the extension end of the abutment cylinder 3. At this time, the crossbeam will be in a straight state under the pushing action of the abutment cylinder 3.

[0054] After this, the push cylinder 2 is activated. At this time, under the push of the two push cylinders 2, the column placed on the worktable 1 is pushed inward. As the column comes into contact with the abutment frame 52 of the side push mechanism 5, under the synchronous limit of the push block 12 and the abutment frame 52, the column is in a straight state.

[0055] As the column is pushed into the workbench 1, when the center point of the crossbeam is not on the center line of the workbench 1, one end of the crossbeam will be closer to the column. Therefore, when the column is pushed, the side of the column will contact the crossbeam and push the crossbeam to move. After the column contacts the abutment frame 52, as the column continues to move, the abutment frame 52 also moves into the workbench 1. This movement of the abutment frame 52 will cause the first rack 521 to drive the rotating gear 51 to rotate. Driven by the rotating gear 51, the second rack 533 moves towards the crossbeam, thereby pushing the second gear 534 towards the crossbeam. Since the second gear 534 meshes with the fixed rack 532... Therefore, the second gear 534 will rotate during the linear movement, thereby driving the push rack 54 to extend out of the sliding frame 53. At this time, the push rack 54 drives the push frame 531 to move towards the crossbeam (when the crossbeam is placed close to the push frame 531, but does not contact it when the abutting cylinder 3 extends, the push of the push frame 531 will gradually push the crossbeam towards the push block 12 connected to the abutting cylinder 3). At this time, with the two columns approaching, the crossbeam will be pushed by the columns so that the midpoint of the crossbeam is on the center line of the worktable 1. When the push frame 531 moves to the end of the stroke, the crossbeam will abut against the side of the push block 12 connected to the abutting cylinder 3, thereby completing the relative positioning between the crossbeam and the column.

[0056] When changing the length of the crossbeam, simply adjust the distance between the side push mechanism 5 and the abutting cylinder 3 according to the length of the crossbeam.

[0057] When the push cylinder 2 moves the column through the connected push block 12, the drive rack 13 on the bottom surface of the push block 12 drives the first gear 15 to rotate, which in turn drives the transmission shaft 14. The transmission shaft 14 drives the first rotating shaft 42 through the reversing gear set 49, and then through the transmission of the synchronous belt 44, the synchronous pulley 45 on the fixed shaft 43 rotates, which finally drives the rotating frame 46 to rotate. The rotating frame 46 drives the centering frame 47 to rotate around the fixed shaft 43. At this time, the centering frames 47 on both sides will rotate synchronously relative to each other. During the rotation of the centering frame 47, when it contacts the two ends of the column, it will push the column to the other end through the inclined surface of its surface. Thus, under the pushing action of the centering frames 47 on both sides and the pushing action of the two push cylinders 2, the centering operation of the column is completed, ensuring that as the column continues to be pushed forward, it can push the crossbeam through contact to center the crossbeam. Once the crossbeam and column are aligned, the push cylinder 2 and the abutment cylinder 3 fix the crossbeam and column from the outside, ensuring that the crossbeam and column will not shift during the subsequent welding process and that there will be no misalignment or other problems during welding.

[0058] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A shell welding system based on DC charging pile production, comprising a workbench (1), the workbench (1) being cross-shaped, characterized in that, Also includes: Multiple push blocks (12) are slidably connected to the top surface of the worktable (1). A drive rack (13) is fixedly connected to the bottom surface of the push block (12). A transmission shaft (14) is rotatably mounted on the long side of the worktable (1). A first gear (15) is fixedly sleeved on the transmission shaft (14). The drive rack (13) meshes with the first gear (15). The centering mechanism (4) includes a centering bracket (41) fixedly connected to one corner of the workbench (1). A fixed shaft (43) is fixedly connected to the inner side of the centering bracket (41). A rotating frame (46) is rotatably mounted on the fixed shaft (43). A centering frame (47) is slidably connected to the rotating frame (46). A guide groove (48) is opened on the outer side of the fixed shaft (43). A sliding column (471) with one end located in the guide groove (48) is fixedly connected inside the rotating frame (46). The centering mechanism (4) further includes a first rotating shaft (42), which is rotatably mounted on the outer side of the workbench (1) and perpendicular to the axis of the transmission shaft (14). A synchronous pulley (45) is fixedly sleeved on the first rotating shaft (42), and another synchronous pulley (45) is rotatably mounted on the fixed shaft (43). The two synchronous pulleys (45) are connected by a synchronous belt (44). The synchronous pulley (45) on the fixed shaft (43) is fixedly connected to the rotating frame (46) to rotate coaxially. The centering mechanism (4) further includes a reversing gear set (49), which includes a first helical gear (491) fixedly sleeved on the transmission shaft (14) and a second helical gear (492) fixedly sleeved on the first rotating shaft (42). The first helical gear (491) and the second helical gear (492) mesh with each other and have the same number of teeth. During the rotation of the centering frame (47), the guide groove (48) causes the centering frame (47) to slide axially on the fixed shaft (43), and the centering frame (47) is close to the synchronous wheel (45) when it is in the default drooping state. During the process of rotating from the default drooping state to the horizontal state, the centering frame (47) slides away from the synchronous wheel (45). During the process of rotating from the vertical state to the horizontal state, the centering frame (47) slides towards the synchronous wheel (45). During the process of rotating from the horizontal state to the vertical state, the centering frame (47) has no displacement in the axial direction of the fixed shaft (43). The side-pushing mechanism (5) includes a rotating gear (51), a contact frame (52) and a sliding frame (53), with two centrally symmetrical contact frames (52) located outside the rotating gear (51); The inner side of the abutment frame (52) is fixedly connected to a first rack (521), which meshes with a rotating gear (51). After the abutment frame (52) is pushed in contact with the column, it drives the rotating gear (51) to rotate. The inside of the abutment frame (52) is fixedly connected to a telescopic rod (522), and the other end of the telescopic rod (522) abuts against one end of the first rack (521) inside another abutment frame (52). The outer side of the sliding frame (53) is slidably connected to a push frame (531), and the inner side of the push frame (531) is fixedly connected to one end of the push rack (54). The sliding frame (53) is internally slidably connected to a second rack (533) that meshes with a self-rotating gear (51). One end of the second rack (533) is connected to a second gear (534). The second rack (533) drives the second gear (534) to move linearly. The sliding frame (53) is internally fixedly connected to a fixed rack (532). The fixed rack (532) meshes with the second gear (534). The pushing rack (54) meshes with the second gear (534) and slides within the sliding frame (53). When the two abutting frames (52) move relative to each other, the rotating gear (51) drives the sliding frame (53) to work and causes the push rack (54) inside it to extend.

2. The shell welding system based on DC charging pile production according to claim 1, characterized in that: Multiple push cylinders (2) and abutment cylinders (3) are fixedly connected to the side of the workbench (1). The push cylinders (2) are located on the long side of the workbench (1), and the abutment cylinders (3) are located on the short side of the workbench (1). The telescopic ends of the push cylinders (2) and abutment cylinders (3) are fixedly connected to the side of the adjacent push block (12).

3. The shell welding system based on DC charging pile production according to claim 2, characterized in that: The top surface of the workbench (1) is provided with a straight slide groove (11) that limits the moving direction of the push block (12).

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