Drawing device
By designing a puller with a rotating drive device and a return spring, the problems of high labor intensity, low production efficiency and enlargement of damaged surfaces in the prior art are solved, and a more efficient and safer pulling process is achieved.
Patent Information
- Application Number
- CN202422037405.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-21
AI Technical Summary
After the pulling is completed, the existing puller requires the operator to rotate the spindle back and forth, resulting in high labor intensity, low production efficiency, and may expand the damaged surface and increase the subsequent workload.
A puller including a second housing, a spindle and a rotating shaft is designed. By providing a rotating drive device and a return spring, the automatic rotation of the spindle and the separation of the welding joints are realized, thereby reducing manual operation.
Reduces labor intensity, improves production efficiency, avoids secondary damage, and simplifies the operation process.
Smart Images
Figure CN223028168U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile sheet metal equipment, and particularly relates to a puller. Background Art
[0002] Automobile sheet metal refers to a technology and process for repairing, renovating and processing automobile bodies and related components. During the process of automobile sheet metal repair, a puller is often required. This tool is mainly used to repair damaged parts of the vehicle body, such as dented areas. Through the puller, the dented area can be gradually restored to its original shape.
[0003] However, during the current use of the puller, it is usually necessary to first clamp the wire clip of the electric welding machine on the conducting head behind the main shaft of the puller. Then, the welding head in front of the main shaft is touched to the dented area. Under the action of the current of the electric welding machine, the welding head will be welded to the dented area. Subsequently, the operator pulls the main shaft to reset the dented area to complete the pulling. After the pulling is completed, in order to separate the conducting head, the operator has to rotate the main shaft back and forth.
[0004] This results in high labor intensity. Rotating the main shaft back and forth takes a relatively long time, leading to low production efficiency. At the same time, when rotating the main shaft, the operator often cannot firmly press the puller bracket against the vehicle body or component to be repaired, resulting in tensile loss of the main shaft to the repair area, expanding the damaged surface and increasing the subsequent workload. Summary of the Utility Model
[0005] Therefore, the utility model provides a puller, which mainly solves the problems of high labor intensity, low production efficiency, expanding the damaged surface and increasing the subsequent workload caused by the need for the operator to rotate the main shaft back and forth after the pulling of the existing puller is completed.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A puller, comprising a second housing, a main shaft and a rotating shaft; the second housing has a box-shaped structure with an open left end; a first housing is provided on the left side of the second housing, and a conductive column is provided on the right side; the first housing is provided with a through main shaft hole in the horizontal direction and a through grip hole in the vertical direction; the grip hole intersects with the main shaft hole, dividing the main shaft hole into a first main shaft hole and a second main shaft hole; a first grip is provided at the bottom of the first housing; the front and rear sides of the rotating shaft are respectively hinged to the front and rear walls of the grip hole above the main shaft hole; the rotating shaft is provided with a second grip; the bottom end of the second grip extends outside the grip hole and can swing left and right in the grip hole; a partition plate is provided in the second housing; the partition plate divides the second housing into a cable chamber and a sliding chamber; a rotation driving device is slidably provided in the sliding chamber; the rotation driving device is connected to one end of the main shaft to drive the main shaft to rotate; the other end of the main shaft can movably pass through the second main shaft hole, the grip hole and the first main shaft hole and extend outside the first housing; the second grip is provided with a movable connecting piece; the main shaft passes through the movable connecting piece; a sleeve and a threaded connection adjusting nut are sequentially sleeved on the main shaft on the right side of the movable connecting piece; the left side of the sleeve fits with the movable connecting piece, and the right side fits with the adjusting nut; a first shaft shoulder is provided in the extending area of the main shaft; a return spring is sleeved on the main shaft between the first shaft shoulder and the first housing; a welding head is provided on the left side of the main shaft for welding the main shaft to the area to be repaired; the main shaft is also provided with an electric slip ring; the electric slip ring is electrically connected to the conductive column through a welding wire.
[0008] Preferably, a first support rod is provided on the upper left side of the first housing; a first support is provided on the side of the first support rod away from the first housing; a second support rod is provided on the lower left side of the first housing; a second support is provided on the side of the second support rod away from the first housing.
[0009] Preferably, rubber pads are provided on the side of the first support away from the first support rod and on the side of the second support away from the second support rod.
[0010] Optionally, the movable connecting piece is a square frame or a ring.
[0011] Preferably, the width and length of the rotation driving device are both adapted to the width and length of the sliding chamber.
[0012] Preferably, a first bearing is sleeved on the main shaft located in the first main shaft hole; a second bearing is sleeved on the main shaft located in the second main shaft hole; the second bearing is located between the sleeve and the adjusting nut; the first bearing is in interference fit with the main shaft and in clearance fit with the first main shaft hole; the second bearing is in clearance fit with both the main shaft and the first main shaft hole.
[0013] Preferably, a limit cover is provided on the left side of the first housing for blocking the first main shaft hole; the main shaft can movably pass through the limit cover.
[0014] Preferably, a second shaft shoulder is provided on the main shaft on the side of the rotation driving device; a nut is sequentially threadedly connected to the main shaft on the left side of the second shaft shoulder, a compression spring is sleeved, and a flat bearing is sleeved; the electric slip ring is located between the flat bearing and the second shaft shoulder.
[0015] Preferably, a limit tube is provided at the bottom left of the partition plate; one end of the welding wire is connected to the electric slip ring, and the other end passes through the limit tube and is connected to the conductive column.
[0016] Optionally, a second switch and a spring pressing piece are respectively provided on the right side of the first housing; the lower part of the spring pressing piece is located on the right side of the second switch; the second switch is electrically connected to the rotation driving device for controlling the opening and closing of the rotation driving device; a push rod is provided on the side surface of the rotation driving device facing the spring pressing piece; the push rod can push the spring pressing piece to squeeze the second switch to turn on and off the rotation driving device.
[0017] The utility model has at least the following beneficial effects:
[0018] It is provided with a first housing and a second housing; a rotation driving device is slidably arranged in the second housing; a main shaft is rotatably arranged in the first housing, the left end of which extends out of the first housing, and a welding head is provided thereon, and the right end is connected to the rotation driving device; an electric slip ring is provided on the main shaft, a conductive column is provided on the second housing, and the electric slip ring is electrically connected to the conductive column through a welding wire; a first grip is provided at the bottom of the first housing, and a second grip that can swing left and right is hinged therein, and a first support and a second support are respectively provided on the upper and lower left sides thereof; the second grip is provided with a movable connecting piece, and the main shaft passes through the movable connecting piece; a sleeve is sequentially sleeved on the main shaft on the right side of the movable connecting piece, and an adjusting nut is threadedly connected; a return spring is provided in the extending area of the main shaft. In this application, the welding current is conducted to the welding head through the conductive column, the electric slip ring and the main shaft for welding and fixing, the sunken area is pulled by pulling back the second grip, and then the welding head is separated by driving the main shaft to rotate through the rotation driving device.
[0019] A puller of the utility model has the advantages of reducing labor intensity, improving labor efficiency, and avoiding secondary damage. Description of the Drawings
[0020] To more clearly illustrate the prior art and the present utility model, the following will briefly introduce the drawings required for describing the prior art and the embodiments of the present utility model. Obviously, the drawings in the following description are only exemplary. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.
[0021] The structures, ratios, sizes, etc. depicted in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present utility model. Any modification of the structure, change in the ratio relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model.
[0022] Figure 1 It is a front cross-sectional view of a puller of the present utility model;
[0023] Figure 2 It is an attached Figure 1 partial enlarged view of part A of the puller of the present utility model;
[0024] Figure 3 It is a schematic structural diagram of the first housing of a puller of the present utility model;
[0025] Figure 4 It is an attached Figure 3 right view of the puller of the present utility model;
[0026] Figure 5 It is a schematic structural diagram of the second housing of a puller of the present utility model;
[0027] Figure 6 It is an attached Figure 5 left view of the puller of the present utility model;
[0028] Figure 7 It is an attached Figure 5 right view of the puller of the present utility model;
[0029] Figure 8 It is a schematic structural diagram of the main shaft of a puller of the present utility model;
[0030] Figure 9 It is an attached Figure 8 left view of the puller of the present utility model;
[0031] Figure 10 It is an attached Figure 8 right view of the puller of the present utility model;
[0032] Figure 11 Schematic diagram of the assembled state of a puller of the present utility model;
[0033] Figure 12 Right - hand view of a puller of the present utility model;
[0034] Explanation of reference numerals:
[0035] 1. First housing; 101. Grip rod hole; 102. Main shaft hole; 1021. First main shaft hole; 1022. Second main shaft hole; 103. First bracket; 104. Second bracket; 2. Second housing; 201. Partition plate; 2011. Cable hole; 202. Sliding chamber; 203. First connecting part; 204. Second connecting part; 205. Cable chamber; 3. First support rod; 4. Second support rod; 5. First support; 6. Second support; 7. Rubber pad; 8. First grip rod; 9. Rotating shaft; 10. Limiting tube; 11. Conductive column; 1101. Clamping groove; 12. Handle; 13. Power supply connector; 14. First switch; 15. Rotating drive device; 16. Main shaft; 1601. First shaft shoulder; 1602. Second shaft shoulder; 17. Welding head; 18. First bearing; 19. Second bearing; 20. Adjusting nut; 21. Electric slip ring; 22. Plain bearing; 23. Nut; 24. Sleeve; 25. Compression spring; 26. Return spring; 27. Second grip rod; 28. Movable connecting piece; 29. Limiting cover; 30. Push rod; 31. Second switch; 32. Spring clip; 33. Welding wire. Detailed implementation manners
[0036] The following further details the present application through specific embodiments in conjunction with the attached drawings.
[0037] In the description of the present application: Unless otherwise specified, "a plurality of" means two or more. Terms such as "first", "second", "third", etc. in the present application are intended to distinguish the objects being referred to, without any special meaning in terms of technical connotation (for example, it should not be understood as emphasizing the importance level or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).
[0038] Terms such as "upper", "lower", "left", "right", "middle", etc. cited in the present application are usually for facilitating intuitive understanding with reference to the attached drawings, rather than an absolute limitation on the positional relationship in the actual product. Without departing from the technical concept disclosed in the present application, changes in these relative positional relationships should also be regarded as within the scope of the present application's description.
[0039] A puller of the present utility model, as Figures 1 to 12As shown, a second housing 2, a main shaft 16, and a rotating shaft 9 are provided. The second housing 2 has a box-shaped structure with an open left end. A first housing 1 is provided on the left side of the second housing 2, and a conductive post 11 is provided on the right side. Specifically, second connection portions 204 and first connection portions 203 are respectively provided on the front and rear side walls on the left side of the second housing 2. The second connection portions 204 are fixedly connected to the front side wall of the first housing 1, and the first connection portions 203 are fixedly connected to the rear side wall of the first housing 1. Alternatively, the first housing 1 and the second housing 2 can be integrally formed. The first housing 1 is provided with a through main shaft hole 102 in the horizontal direction and a through grip hole 101 in the vertical direction. The grip hole 101 intersects with the main shaft hole 102, and the grip hole 101 divides the main shaft hole 102 into a first main shaft hole 1021 and a second main shaft hole 1022. A first grip 8 is provided at the bottom of the first housing 1. The front and rear sides of the rotating shaft 9 are respectively hinged to the front and rear walls of the grip hole 101 above the main shaft hole 102. A second grip 27 is fixedly provided on the rotating shaft 9. The bottom end of the second grip 27 extends outside the grip hole 101, and the second grip 27 can swing left and right in the grip hole 101. A partition plate 201 is provided in the second housing 2, and the partition plate 201 divides the second housing 2 into a cable chamber 205 and a sliding chamber 202. A rotation driving device 15 is slidably provided in the sliding chamber 202. The rotation driving device 15 is connected to one end of the main shaft 16 to drive the main shaft 16 to rotate. Specifically, the rotation driving device 15 can use a motor or a combination of a motor and a transmission. When using a motor, the output shaft of the motor is connected to the main shaft 16 to drive the main shaft 16 to rotate. When using a combination of a motor and a transmission, the output shaft of the transmission is connected to the main shaft 16 to drive the main shaft 16 to rotate. This is well-known prior art to those skilled in the art and will not be elaborated here. At the same time, to facilitate its sliding in the sliding chamber 202, a housing adapted to the outer shape of the sliding chamber 202 can be installed outside the motor or the combination of the motor and the transmission, so as to facilitate the rotation driving device 15 to slide in the sliding chamber 202. This is also a technology easily achieved by those skilled in the art and will not be elaborated here. The other end of the main shaft 16 can movably pass through the second main shaft hole 1022, the grip hole 101, and the first main shaft hole 1021 and extend outside the first housing 1. An active connection member 28 is provided on the second grip 27. The main shaft 16 passes through the active connection member 28. A sleeve 24 and an adjusting nut 20 connected by threads are sequentially sleeved on the main shaft 16 on the right side of the active connection member 28, so that the left side of the sleeve 24 fits with the active connection member 28 and the right side fits with the adjusting nut 20. In this way, the function of the adjusting nut 20 is to limit the sleeve 24 and prevent the sleeve 24 from moving to the right side of the main shaft 16. At the same time, it can push the sleeve 24 to move to the left side of the main shaft 16 to adjust the length of the main shaft 16 extending outside the first housing 1 to adapt to the repair of concave surfaces with different depths.The extended area of the main shaft 16 is provided with a first shaft shoulder 1601. A return spring 26 is sleeved on the main shaft 16 between the first shaft shoulder 1601 and the first housing 1. Both ends of the return spring 26 are limited between the first shaft shoulder 1601 and the first housing 1. Under the tension of the return spring 26, the main shaft 16 moves to the left. A welding head 17 is provided on the left side of the main shaft 16, which is used to weld the main shaft 16 to the area to be repaired. To conduct the welding current of the electric welding machine to the welding head 17, the main shaft 16 is also provided with a slip ring 21. The slip ring 21 includes an inner ring and an outer ring, and there are balls arranged between the inner ring and the outer ring. In addition, the prior art well-known to those skilled in the art will not be elaborated here. The inner ring of the slip ring 21 is sleeved on the outer wall of the main shaft 16, and the outer ring of the slip ring 21 is electrically connected to the conductive column 11 through a welding wire 33. During use, the wire clip of the electric welding machine is clamped on the conductive column 11, and the welding current of the electric welding machine is conducted to the main shaft 16 through the slip ring 21. The main shaft 16 is made of metal material and is then conducted to the welding head 17 by the main shaft 16. To prevent the slip ring 21 from heating and sparking during use, the welding wire 33 is made of copper wire.
[0040] Preferably, for the convenience of use and operation, and also for the convenience of having support during pulling, a first support rod 3 is provided on the upper left side of the first housing 1. Specifically, an upwardly inclined first support 103 can be provided on the upper left side of the first housing 1, and the first support rod 3 is provided on the first support 103. A first support seat 5 is provided on the side of the first support rod 3 away from the first housing 1. A second support rod 4 is provided on the lower left side of the first housing 1. Specifically, a downwardly inclined second support 104 can be provided on the lower left side of the first housing 1, and the second support rod 4 is provided on the second support 104. A second support seat 6 is provided on the side of the second support rod 4 away from the first housing 1.
[0041] Preferably, to prevent the first support seat 5 and the second support seat 6 from scratching the surface of the item to be repaired, rubber pads 7 are provided on the side surface of the first support seat 5 away from the first support rod 3 and on the side surface of the second support seat 6 away from the second support rod 4.
[0042] Optionally, the movable connecting member 28 in this embodiment is a square frame, and a circular ring, an oval ring, etc. can also be used.
[0043] Preferably, to make the puller of the present application move smoothly left and right and avoid incorrect pulling in the wrong direction, the width and length of the rotation driving device 15 are adapted to the width and length of the sliding chamber 202, so that the rotation driving device 15 can slide smoothly back and forth left and right in the length direction of the sliding chamber 202.
[0044] Preferably, to enable the main shaft 16 to rotate smoothly and reduce the frictional resistance during rotation of the main shaft 16, a first bearing 18 is sleeved on the main shaft 16 located in the first main shaft hole 1021, and a second bearing 19 is sleeved on the main shaft 16 located in the second main shaft hole 1022. The second bearing 19 is located between the sleeve 24 and the adjusting nut 20. The first bearing 18 is in interference fit with the main shaft 16 and clearance fit with the first main shaft hole 1021; the second bearing 19 is in clearance fit with both the main shaft 16 and the first main shaft hole 1021. This structure can not only ensure the stability of the main shaft 16 during rotation but also enable the main shaft 16 to obtain flexibility during left and right movement.
[0045] Preferably, to limit the leftward movement of the main shaft 16, a limit cover 29 is provided on the left side of the first housing 1 for blocking the first main shaft hole 1021. The main shaft 16 can pass through the limit cover 29 movably. The limit cover 29 limits the leftward movement of the first bearing 18, and since the main shaft 16 is in interference fit with the first bearing 18, it also limits the leftward movement of the main shaft 16.
[0046] Preferably, a welding wire 33 is connected to the outer ring of the electric slip ring 21. To improve the stability of the electric slip ring 21 and not affect the rotation of the main shaft 16, a second shaft shoulder 1602 is provided on the main shaft 16 facing the rotational drive device 15. On the main shaft 16 to the left of the second shaft shoulder 1602, a nut 23 is sequentially threadedly connected, a compression spring 25 is sleeved, and a plain bearing 22 is sleeved. The plain bearing 22 is in clearance fit with the main shaft 16. The electric slip ring 21 is located between the plain bearing 22 and the second shaft shoulder 1602. By rotating the nut 23, the compression spring 25 presses the plain bearing 22 against the inner ring of the electric slip ring 21, and the inner ring of the electric slip ring 21 is limited between the plain bearing 22 and the second shaft shoulder 1602.
[0047] Preferably, when the main shaft 16 rotates, the outer ring of the electric slip ring 21 usually also rotates to a certain extent under the drive of the inner ring, thereby pulling the welding wire 33. To prevent the outer ring of the electric slip ring 21 from rotating and maintain stability, a limit tube 10 is provided at the bottom left of the partition plate 20). One end of the welding wire 33 is connected to the electric slip ring 21, and the other end passes through the limit tube 10 and is connected to the conductive column 11. The limit tube 10 limits the welding wire 33, thus maximally preventing the outer ring of the electric slip ring 21 from rotating and avoiding safety accidents caused by the winding of the welding wire 33.
[0048] Optionally, after the drawing operation is completed, when the need arises to start the rotation drive device 15 to drive the main shaft 16 to rotate, in order to improve the automatic operation performance, a second switch 31 and a spring pressing piece 32 are respectively provided on the right side of the first housing 1. The lower part of the spring pressing piece 32 is located on the right side of the second switch 31. The second switch 31 is electrically connected to the rotation drive device 15 and is used to control the opening and closing of the rotation drive device 15. A push rod 30 is provided on the side of the rotation drive device 15 facing the spring pressing piece 32. In this way, when the drawing operation is completed and the main shaft moves leftward and resets under the tension of the return spring 26, the rotation drive device 15 causes the push rod 30 to push the spring pressing piece 32, so that the spring pressing piece 32 presses the second switch 31, thereby opening and closing the rotation drive device 15. In actual application, a power supply connector 13 and a first switch 14 are respectively provided on the right side of the second housing 2. The power supply connector 13 is electrically connected to the rotation drive device 15 and is used to supply power to the rotation drive device 15. The first switch 14 is electrically connected to the rotation drive device 15 and is also used to control the opening and closing of the rotation drive device 15. The first switch 14 is a manual switch and is actively operated by the operator. The first switch 14 and the second switch 31 simultaneously control the opening and closing of the rotation drive device 15. This "dual-control" wiring method of the first switch 14 and the second switch 31, as well as the wiring method of the power supply connector 13, are all well-known prior arts to those skilled in the art and will not be elaborated here.
[0049] Preferably, in order to facilitate the storage of the connecting wires between the power supply connector 13, the rotation drive device 15, the first switch 14 and the second switch 31 and to prevent these wires from affecting the rotation of the main shaft 16, a cable hole 2011 is opened in the partition plate 201, and the power supply connector 13 is located on the outer wall of the second housing 2 where the cable chamber 205 is located. In this way, these wires pass through the cable hole 2011 and are connected to the power supply connector 13 via the cable chamber 205.
[0050] Preferably, in order to facilitate the fixing of the wire clamp of the electric welding machine, a clamping groove 1101 is opened on the outer wall of the conductive column 11.
[0051] Preferably, in order to facilitate the operator's holding and use, a handle 12 is provided on the right side of the conductive column 11.
[0052] The working principle of this application is as follows:
[0053] Turn on the power supply; clamp the wire clamp of the electric welding machine onto the conductive column; the operator holds the first grip and the second grip; slightly pull back the second grip to move it towards the first grip. The second grip pushes the sleeve, the sleeve pushes the second bearing, and the second bearing pushes the adjusting nut. Since the adjusting nut is threadedly connected to the main shaft, the main shaft moves to the right; make the first support and the second support contact the outer surface around the area to be repaired; release the second grip. Under the tension of the return spring, the main shaft moves to the left, and the welding head contacts the area to be repaired. Under the action of the welding current of the electric welding machine, the welding head and the area to be repaired are welded together; pull back the second grip to move it towards the first grip. The second grip pushes the sleeve, the sleeve pushes the second bearing, and the second bearing pushes the adjusting nut. Since the adjusting nut is threadedly connected to the main shaft, the main shaft moves to the right. Under the support of the first support and the second support, the depression is pulled and reset; after the depression is reset, release the second grip. Under the tension of the return spring, the main shaft moves to the left, driving the rotation drive device to move to the left, so that the push rod presses the spring piece, presses the second switch, and the second switch emits a level signal. The rotation drive device starts to drive the main shaft to rotate, separating the welding head from the area to be repaired, and the repair is completed; then pull back again and release, allowing the push rod to press the spring piece and press the second switch again, so that the second switch emits a level signal again, turning off the rotation drive device, or press the first switch to turn off the rotation drive device.
[0054] In the above text, the present application has been described in a relatively specific and detailed manner through general descriptions and specific embodiments. It should be understood that based on the technical concept of the present application, several conventional adjustments or further innovations can be made to these specific embodiments; but as long as they do not depart from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of the present application.
Claims
1. A puller, characterized in that: The invention comprises a second shell (2), a main shaft (16) and a rotating shaft (9); the second shell (2) is a box-shaped structure with an opening at the left end; a first shell (1) is provided on the left side of the second shell (2), and a conductive column (11) is provided on the right side; the first shell (1) is provided with a main shaft hole (102) through-through in the horizontal direction, and a gripping rod hole (101) through-through in the vertical direction; the gripping rod hole (101) intersects with the main shaft hole (102), dividing the main shaft hole (102) into a first main shaft hole (1021) and a second main shaft hole (1022); a first gripping rod (1021) is provided at the bottom of the first shell (1) 8); the front and rear sides of the rotating shaft (9) are respectively hinged to the front and rear walls of the gripping hole (101) above the main shaft hole (102); the rotating shaft (9) is provided with a second gripping rod (27); the bottom end of the second gripping rod (27) extends outside the gripping hole (101) and can swing left and right in the gripping hole (101); a partition plate (201) is provided in the second housing (2); the partition plate (201) divides the second housing (2) into a cable chamber (205) and a sliding chamber (202); the sliding chamber (202) is slidably provided with a rotation driving device (15); The rotation driving device (15) is connected to one end of the main shaft (16) to drive the main shaft (16) to rotate; the other end of the main shaft (16) can movably pass through the second main shaft hole (1022), the gripping rod hole (101) and the first main shaft hole (1021), and extend out of the first shell (1); the second gripping rod (27) is provided with a movable connecting piece (28); the main shaft (16) passes through the movable connecting piece (28); the main shaft (16) on the right side of the movable connecting piece (28) is sequentially sleeved with a sleeve (24) and a threaded adjustment nut (20); the sleeve The left side of the tube (24) is engaged with the movable connecting piece (28), and the right side is engaged with the adjusting nut (20); a first shaft shoulder (1601) is provided in the protruding area of the main shaft (16); a return spring (26) is provided on the main shaft (16) between the first shaft shoulder (1601) and the first shell (1); a welding head (17) is provided on the left side of the main shaft (16) for welding the main shaft (16) to the area to be repaired; the main shaft (16) is also provided with an electric slip ring (21); the electric slip ring (21) is electrically connected to the conductive column (11) through a welding wire (33).
2. A puller according to claim 1, characterized in that: A first support rod (3) is provided at the upper left side of the first shell (1); a first support seat (5) is provided at the side of the first support rod (3) away from the first shell (1); a second support rod (4) is provided at the lower left side of the first shell (1); and a second support seat (6) is provided at the side of the second support rod (4) away from the first shell (1).
3. A puller according to claim 2, characterized in that: A rubber pad (7) is provided on the side of the first support (5) away from the first support rod (3) and on the side of the second support (6) away from the second support rod (4).
4. A puller according to claim 2, characterized in that: The movable connecting member (28) is a square frame or a circular ring.
5. A puller according to claim 2, characterized in that: The width and length of the rotary drive device (15) are adapted to the width and length of the sliding chamber (202).
6. A puller according to claim 5, characterized in that: The spindle (16) located in the first spindle hole (1021) is sleeved with a first bearing (18); the spindle (16) located in the second spindle hole (1022) is sleeved with a second bearing (19); the second bearing (19) is located between the sleeve (24) and the adjusting nut (20); the first bearing (18) is interference fit with the spindle (16) and has a clearance fit with the first spindle hole (1021); the second bearing (19) is clearance fit with the spindle (16) and the first spindle hole (1021).
7. A puller according to claim 6, characterized in that: A limit cover (29) is provided on the left side of the first shell (1) for blocking the first spindle hole (1021); the spindle (16) can movably pass through the limit cover (29).
8. A puller according to claim 2, characterized in that: The main shaft (16) on the side facing the rotation drive device (15) is provided with a second shoulder (1602); the main shaft (16) on the left side of the second shoulder (1602) is threadedly connected with a nut (23), sleeved with a compression spring (25), and sleeved with a plane bearing (22) in sequence; the electric slip ring (21) is located between the plane bearing (22) and the second shoulder (1602).
9. A puller according to claim 8, characterized in that: A limit tube (10) is provided at the bottom of the left side of the partition plate (201); one end of the welding wire (33) is connected to the electric slip ring (21), and the other end passes through the limit tube (10) and is connected to the conductive column (11).
10. A puller according to claim 2, characterized in that: A second switch (31) and a spring pressing piece (32) are respectively provided on the right side of the first housing (1); the lower part of the spring pressing piece (32) is located on the right side of the second switch (31); the second switch (31) is electrically connected to the rotation drive device (15) and is used to control the opening and closing of the rotation drive device (15); the rotation drive device (15) is provided with a push rod (30) on the side facing the spring pressing piece (32); the push rod (30) can push the spring pressing piece (32) so that the spring pressing piece (32) presses the second switch (31) so that the rotation drive device (15) is opened and closed.