Pneumatic puller with pressure regulating function

Abstract

The utility model relates to a pneumatic puller with a pressure regulating function, which is provided with a gun body, an air cylinder, a handle, a pressure regulating valve and an electromagnetic valve, the gun body is movably provided with a conductive column; the left end of the main shaft penetrates through the left side wall of the air cylinder and extends out of the air cylinder, and the right end extends out of the right side wall of the air cylinder and is connected with the left end of the conductive column. An air outlet pipe of the pressure regulating valve is communicated with the air cavity through a second connecting pipe, and the air cavity is communicated with the electromagnetic valve through a first connecting pipe; a gas inlet pipe of the pressure regulating valve is connected with a gas pipe for communicating high-pressure gas; meanwhile, a pressure regulating device is arranged and used for driving a pressure regulating shaft of the pressure regulating valve to rotate, and high-pressure gas with different pressures is supplied to the air cylinder. The device has the advantages of being easy to operate, convenient to adjust pressure, high in using affinity, capable of improving operation efficiency and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile sheet metal equipment, and particularly relates to a pneumatic puller with a pressure regulating function. 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] During the use of the current puller, usually, the wire clip of the electric welding machine needs to be clamped on the conducting head behind the main shaft of the puller first. 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] For different dent depths, corresponding pulling forces need to be matched. Excessive force will cause the dented point to be over-pulled and protrude, resulting in secondary damage. Therefore, the pulling operation requires skilled workers with rich experience, and manual pulling is inefficient, time-consuming and laborious.

[0005] In order to solve the above problems, the Chinese utility model patent with the publication number of "CN 211940726 U" discloses "a pneumatic puller". This puller limits the expansion and contraction of the copper rod through an adjusting nut, then pulls the trigger to drive the air plug to make the air pipe provide high-pressure air for the air chamber, so that the piston moves backward to drive the copper rod to contract. When the trigger is released, the air plug resets to cut off the channel between the air pipe and the air chamber, and the spring resets to make the piston move forward to drive the copper rod to extend. By operating repeatedly in this way, the sheet metal dent is repaired.

[0006] The disadvantage of the above pneumatic puller is that the pressure of the high-pressure air cannot be quickly adjusted, which makes it difficult to control the pulling force to adapt to different dent depths. Therefore, it can only pull and repair dented points with similar concavities, and it brings inconvenience in use for repairing dented points with relatively large changes in concavity.

[0007] And the pressure regulating valves of the prior art, such as Figure 1As shown in the figure, it includes a housing 1', which is divided into a first chamber 101' and a second chamber 102' by a partition wall 2'. The partition wall 2' is provided with an air flow hole 201' for communicating the first chamber 101' and the second chamber 102'. A valve cylinder 3' is arranged in the first chamber 101'. A valve core 4' is slidably arranged in the valve cylinder 3'. A pressure spring 6' is arranged between the bottom of the valve core 4' and the bottom wall of the valve cylinder 3'. A sealing ring 5' is arranged between the side wall of the valve core 4' and the side wall of the valve cylinder 3'. The sealing ring 5' forms a sealed pressing chamber 501' at the bottom of the valve cylinder 3'. The second chamber 102' is divided into an exhaust chamber 1021' and an adjustment chamber 1022' by an elastic rubber partition 8'. A sealing gasket 7' is sleeved on the valve core 4'. The housing 1' is threadedly connected with a pressure regulating shaft 9'. The bottom end of the pressure regulating shaft 9' extends into the adjustment chamber 1022' and contacts the top surface of the rubber partition 8'. The top of the valve core 4' is located directly below the adjustment shaft 9' and contacts the bottom surface of the rubber partition 8'. The valve core 4' is provided with a balance pipe 401' for communicating the exhaust chamber 1021' and the pressing chamber 501'. The balance pipe 401' balances the air pressure in the pressing chamber 501' and the air pressure in the exhaust chamber 1021', so as not to affect the pressing of the pressure spring 6' on the valve core 4'. The housing 1' is also respectively provided with an air inlet pipe 10' communicating with the first chamber 101' and an air outlet pipe 11' communicating with the exhaust chamber 1021'. When in use, high-pressure gas is introduced through the air inlet pipe 10' and discharged through the air outlet pipe 11'. The valve core 4' moves upward under the action of the pressure spring 6' to block the air flow hole 201' with the sealing gasket 7'. By rotating the adjustment shaft 9' to press down the rubber partition 8', the rubber partition 8' presses down the valve core 4' to open the air flow hole 201'. By rotating the adjustment shaft 9', the pressing distance is adjusted, so as to adjust the air output of the air flow hole 201' to achieve pressure adjustment; on some pressure regulating valves, the housing 1' is also provided with a pressure relief pipe 12' communicating with the exhaust chamber 1021'. The high-pressure gas in the exhaust chamber 1021' is quickly discharged through the pressure relief pipe 12', so that the pressure regulating valve is quickly closed.

[0008] Therefore, how to apply the pressure regulating valve of the prior art to a pneumatic puller, so that the operator can conveniently adjust the pressure of the high-pressure gas, and further enable the pneumatic puller to adapt to different concave point depths, is an urgent problem to be solved at present. Utility Model Content

[0009] Therefore, the present utility model provides a pneumatic puller with a pressure regulating function, mainly to apply the pressure regulating valve of the prior art to the pneumatic puller, so as to solve the technical problems that the pneumatic puller of the prior art cannot conveniently and quickly adjust the pressure of the high-pressure gas and cannot adapt to different concave point depths.

[0010] In order to achieve the above object, the present utility model provides the following technical solutions:

[0011] A pneumatic puller with a pressure regulating function comprises a gun body, a pressure regulating valve and a solenoid valve; a cylinder is arranged on the left side of the gun body; a handle is arranged at the bottom of the gun body and the cylinder assembly; a through pulling hole is opened in the horizontal direction of the gun body; a conductive column is movably arranged in the pulling hole; a main shaft is fixedly arranged on the piston of the cylinder; the left end of the main shaft can be movably extended out of the left side wall of the cylinder, and a welding head is arranged on the main shaft; the right end of the main shaft can be movably extended out of the right side wall of the cylinder, and can movably pass through the pulling hole to be connected with the left end of the conductive column; the right end of the conductive column extends out of the gun body, and its extended area A wire clamp for connecting an electric welding machine; the cylinder is provided with an air inlet and a pressure relief port; the air inlet and the pressure relief port are both connected to the air cavity of the cylinder; the main shaft sleeve is provided with a reset spring; the reset spring is located between the piston of the cylinder and the right side wall of the cylinder; the air outlet pipe of the pressure regulating valve is connected to the air inlet through a second connecting pipe; the air inlet pipe of the pressure regulating valve is connected with an air pipe for inputting high-pressure gas; the pressure relief port is connected to the solenoid valve through a first connecting pipe; and also includes a pressure regulating device for driving the pressure regulating shaft of the pressure regulating valve to rotate and giving the cylinder high-pressure gas of different pressures.

[0012] Preferably, the left side walls of the cylinder on both sides of the main shaft are provided with support rods, and the side of the support rod away from the cylinder is provided with a support seat.

[0013] Optionally, the pressure regulating device includes a wrench, a toggle plate and an elastic pressure plate; the upper portion of the wrench is hinged to the handle; one end of the toggle plate is fixedly connected to the pressure regulating shaft of the pressure regulating valve, and the other end is a free end; one end of the pressure plate is fixedly connected to the handle, and the other end is a free end; the left side surface of the toggle plate can contact the right side surface of the wrench; the left side surface of the pressure plate can contact the right side surface of the toggle plate.

[0014] Preferably, a pushing block is provided on the left side of the toggle plate; and the side surface of the pushing block away from the toggle plate can contact the right side surface of the wrench.

[0015] Preferably, the wrench is fixedly provided with a switch; the switch is electrically connected to the solenoid valve and is used to control the opening and closing of the solenoid valve; the switch button of the switch is located on the right side of the pressure plate and can contact the right side of the pressure plate; the switch is a timing switch.

[0016] Preferably, the handle comprises a bottom handle body arranged at the gun body and the cylinder assembly and a handle cover arranged at the front side of the handle body; the handle body is provided with a handle body groove on the side facing the handle cover; the handle cover is provided with a handle cover groove on the side facing the handle body; the handle body groove and the handle cover groove constitute a handle chamber; the pressure regulating shaft of the pressure regulating valve can movably pass through the handle cover and extend into the handle chamber; the toggle plate is located in the handle chamber; the pressure plate and the switch are both arranged in the handle body groove; the right side of the wrench can movably be embedded between the handle body and the handle cover, and the left side extends out of the handle.

[0017] Preferably, the outer wall of the piston is sleeved with a first sealing ring for sealing between the outer wall of the piston and the inner wall of the cylinder; the left side wall of the cylinder is nested with a second sealing ring for sealing between the outer wall of the main shaft and the left side wall of the cylinder.

[0018] Preferably, a first bearing is provided between the conductive column and the gun body; a second bearing is provided between the main shaft and the gun body; the first bearing has an interference fit with the wall of the drawing hole and a clearance fit with the outer wall of the conductive column; the second bearing has an interference fit with the wall of the drawing hole and a clearance fit with the outer wall of the main shaft.

[0019] Preferably, the main shaft sleeve between the left side wall of the cylinder and the piston is provided with a third bearing; the third bearing has an interference fit with the inner wall of the cylinder and a clearance fit with the outer wall of the main shaft.

[0020] Preferably, the main shaft sleeve between the return spring and the right side wall of the cylinder is provided with a fourth bearing; the fourth bearing has an interference fit with the inner wall of the cylinder and a clearance fit with the outer wall of the main shaft.

[0021] The utility model has at least the following beneficial effects:

[0022] The invention discloses a gun body, a cylinder and a handle in a pistol-shaped structure, and a pressure regulating valve and a solenoid valve; the gun body is movably provided with a conductive column, and the piston is provided with a main shaft; the left end of the main shaft passes through the left wall of the cylinder and extends out thereof, and a welding head is provided on the main shaft, and the right end extends out of the right wall of the cylinder and is connected with the left end of the conductive column; the air outlet pipe of the pressure regulating valve is connected with the air cavity through the second connecting pipe, and the air cavity is connected with the solenoid valve through the first connecting pipe; the air inlet pipe of the pressure regulating valve is connected with an air pipe for connecting high-pressure gas; and a pressure regulating device is provided at the same time, which is used to drive the pressure regulating shaft of the pressure regulating valve to rotate and give the cylinder high-pressure gas of different pressures.

[0023] It can be seen that the pneumatic puller with pressure regulating function of the utility model has at least the following advantages:

[0024] 1. A pistol-shaped structure composed of a gun body, a cylinder, and a handle, which is easy for the user to operate with one hand and improves the comfort of the operator during work.

[0025] 2. The handle is hinged with a wrench, and a pressure regulating shaft is fixedly provided with a toggle plate. At the same time, an elastic pressing plate is set. By pulling the wrench to push the toggle plate, the pressure can be adjusted. And the pressing plate gives a reaction force to the toggle plate, so that the greater the pressure to be obtained, the greater the pushing force on the wrench, which greatly improves the affinity of the operator; at the same time, a switch and a switch button are set. When pulling the wrench to open the pressure regulating valve, the pressing plate presses the switch button. When releasing the wrench to close the pressure regulating valve, the pressing plate releases the switch button, thereby controlling the solenoid valve. This linkage method not only improves the automation degree of the puller of this application, but also has a simple structure, is easy to produce and process, reduces costs, and also improves the convenience of operation and the working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the prior art and the present invention, the drawings required for describing the prior art and the embodiments of the present invention will be briefly introduced below. Obviously, the drawings in the following description are only exemplary. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to the provided drawings.

[0027] The structures, ratios, sizes, etc. shown 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 limiting conditions for the implementation of the present invention. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention.

[0028] Figure 1 It is a front sectional view of a pressure regulating valve in the prior art;

[0029] Figure 2 It is a schematic structural diagram of a pneumatic puller with a pressure regulating function according to the present invention;

[0030] Figure 3 It is a front sectional view of a pneumatic puller with a pressure regulating function according to the present invention;

[0031] Figure 4 It is an enlarged partial view of part A of a pneumatic puller with a pressure regulating function according to the present invention Figure 3 ;

[0032] Figure 5 It is a schematic structural diagram of a pressure regulating device of a pneumatic puller with a pressure regulating function according to the present invention;

[0033] Figure 6 An attached Figure 5 partial enlarged view of part B of the pneumatic puller with a pressure regulating function of the present utility model;

[0034] Explanation of reference numerals:

[0035] 1. Gun body; 101. Pulling hole; 2. Cylinder; 3. Handle; 301. Handle body; 302. Handle cover; 4. Main shaft; 5. Welding head; 6. Conductive column; 7. Wrench; 8. Pressure regulating valve; 9. Solenoid valve; 10. Air outlet pipe; 11. Pressure relief pipe; 12. Air inlet pipe; 13. Pressure relief port; 14. Air inlet; 15. First connecting pipe; 16. Second connecting pipe; 17. Grip; 18. Air pipe; 19. Support rod; 20. Support seat; 21. Piston; 22. Spring sleeve; 23. Air chamber; 24. Return spring; 25. First sealing ring; 26. Locking nut; 27. Second sealing ring; 28. First bearing; 29. Second bearing; 30. Third bearing; 31. Pressure regulating shaft; 32. Switch; 3201. Switch button; 33. Toggle plate; 34. Pressure plate; 35. Pushing block; 36. Fourth bearing; 37. Third connecting pipe. Detailed implementation manners

[0036] The following further details the present application through specific embodiments in conjunction with the accompanying 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, and do not have special significance in terms of technical connotations (for example, they 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 the convenience of intuitively understanding with reference to the accompanying drawings, and are not absolute limitations on the positional relationships in the actual product. Without departing from the technical concept disclosed in the present application, changes in these relative positional relationships shall also be regarded as falling within the scope of the present application's description.

[0039] A pneumatic puller with a pressure regulating function of the present utility model, such as Figures 2 to 6As shown in the figure, a gun body 1, a pressure regulating valve 8 and a solenoid valve 9 are provided. A cylinder 2 is provided on the left side of the gun body 1, and a handle 3 is provided at the bottom of the combined body of the gun body 1 and the cylinder 2. The gun body 1, the cylinder 2 and the handle 3 are combined into a pistol-shaped structure, which is convenient for the operator to operate with one hand and improves the convenience and comfort of use. The gun body 1 is provided with a through drawing hole 101 in the horizontal direction, and a conductive column 6 is movably arranged in the drawing hole 101. The piston 21 of the cylinder 2 is fixedly provided with a main shaft 4. Specifically, locking nuts 26 can be threadedly connected to the main shaft 4 on both the left and right sides of the piston 21, and the piston 21 and the main shaft 4 are fixedly connected together through the locking nuts 26. The main shaft 4 is generally made of a metal conductive material, and preferably made of metal copper. The left end of the main shaft 4 can extend out of the left side wall of the cylinder 2 movably, and a welding head 5 is provided thereon. The right end of the main shaft 4 can extend out of the right side wall of the cylinder 2 movably and can movably pass through the drawing hole 101 to be connected to the left end of the conductive column 6. The right end of the conductive column 6 extends out of the gun body 1, and the extended area is used to connect the wire loop of the welding machine. In this way, the welding current of the welding machine is conducted to the main shaft 4 through the conductive column 6 and then conducted to the welding head 5 through the main shaft 4. The cylinder 2 is provided with an air inlet 14 and a pressure relief port 13, and both the air inlet 14 and the pressure relief port 13 are communicated with the air chamber 23 of the cylinder 2. A return spring 24 is sleeved outside the main shaft 4, and the return spring 24 is located between the piston 21 of the cylinder 2 and the right side wall of the cylinder 2. The air outlet pipe 10 of the pressure regulating valve 8 is communicated with the air inlet 14 through the second connecting pipe 16, and the air inlet pipe 12 of the pressure regulating valve 8 is connected to the air pipe 18 for inputting high-pressure gas. The pressure relief port 13 is communicated with the solenoid valve 9 through the first connecting pipe 15. It also includes a pressure regulating device for driving the pressure regulating shaft 31 of the pressure regulating valve 8 to rotate. In this way, high-pressure gas with different pressures can be input into the cylinder 2.

[0040] Preferably, for the convenience of use and operation and also for the convenience of having support during drawing, support rods 19 are provided on both left side walls of the cylinder 2 on both sides of the main shaft 4. A support seat 20 is provided on the side surface of the support rod 19 away from the cylinder 2. To prevent the support rods 19 and the support seats 20 from affecting the contact between the welding head 5 and the concave point to be repaired, the distance between the left end surface of the welding head 5 and the left side wall of the cylinder 2 is greater than the distance between the left end surface of the support seat 20 and the left side wall of the cylinder 2.

[0041] Optionally, for the pressure regulating valve 8 of the present application, it is selected that the reverse rotation of the pressure regulating shaft 31 increases the pressure, and the forward rotation decreases the pressure. An optimal implementation manner of the pressure regulating device in the embodiments of the present application is as follows: The pressure regulating device includes a wrench 7, a toggle plate 33, and an elastic pressing plate 34. The upper part of the wrench 7 is hinged to the handle 3. One end of the toggle plate 33 is fixedly connected to the pressure regulating shaft 31 of the pressure regulating valve 8, and the other end is a free end. One end of the pressing plate 34 is fixedly connected to the handle 3, and the other end is a free end. The left side surface of the toggle plate 33 can contact the right side surface of the wrench 7. The left side surface of the pressing plate 34 can contact the right side surface of the toggle plate 33. Press the lower part of the wrench 7 to the right, and the wrench 7 rotates to the right to push the toggle plate 33 to move rightward, causing the pressure regulating shaft 31 to rotate reversely. The pressure regulating shaft 31 presses against the valve core to achieve the adjustment of gradually increasing pressure. At the same time, the toggle plate 33 pushes the pressing plate 34, and the elastic pressing plate 34 is pressed and bends to the right. Release the wrench 7, and the pressing plate 34 rebounds under the action of the elastic force, pushing the toggle plate 33 to move leftward, causing the pressure regulating shaft 31 to rotate forward to achieve the adjustment of gradually decreasing pressure until it is closed.

[0042] Preferably, to achieve the flexibility of the wrench 7 to push the toggle plate 33, a pushing block 35 is provided on the left side surface of the toggle plate 33, and the side surface of the pushing block 35 away from the toggle plate 33 can contact the right side surface of the wrench 7.

[0043] Preferably, to achieve the automatic control of the solenoid valve 9, further improve the convenience of operating the extractor of the present application, and promote the improvement of the acting efficiency, a switch 32 is fixedly provided on the wrench 7. The switch 32 is electrically connected to the solenoid valve 9 and is used to control the opening and closing of the solenoid valve 9. The switch button 3201 of the switch 32 is located on the right side of the pressing plate 34 and can contact the right side surface of the pressing plate 34. The switch 32 is a timing switch. In this way, during the process of pushing the wrench 7 to open the pressure regulating valve 8 for extraction, the switch button 3201 is pressed. After the extraction is completed, during the process of releasing the wrench 7 to close the pressure regulating valve 8, the switch button 3201 is released, and the switch 32 is triggered by a signal to open the solenoid valve 9. The high-pressure gas in the air chamber 23 of the cylinder 2 is released, and the return spring 24 pushes the piston 21 to move leftward to reset the main shaft 4.

[0044] Preferably, in order to further improve the comfort of operation, the handle 3 of the puller of the present application includes a handle body 301 at the bottom of the gun body 1 and the cylinder 2 combination and a handle cover 302 arranged on the front side of the handle body 301. The handle body 301 is provided with a handle body groove (not marked in the drawings) on the side of the handle cover 302, and the handle cover 302 is provided with a handle cover groove (not marked in the drawings) on the side of the handle body 301, and the handle body groove and the handle cover groove constitute a handle chamber (not marked in the drawings). The pressure regulating shaft 31 of the pressure regulating valve 8 can movably pass through the handle cover 302 and extend into the handle chamber, the toggle plate 33 is located in the handle chamber, and the pressure plate 34 and the switch 32 are both arranged in the handle body groove. The right side of the wrench 7 is movably embedded between the handle body 301 and the handle cover 302, and its front and rear sides are respectively hinged on the handle body 301 and the handle cover 302, and its left side extends out of the handle 3.

[0045] Preferably, in order to keep the air cavity 23 sealed, a first sealing ring 25 is sleeved on the outer wall of the piston 21 for sealing between the outer wall of the piston 21 and the inner wall of the cylinder 2; a second sealing ring 27 is nested on the left side wall of the cylinder 2 for sealing between the outer wall of the main shaft 4 and the left side wall of the cylinder 2.

[0046] Preferably, in order to ensure the smooth rotation and left and right movement of the main shaft 4, a first bearing 28 is provided between the conductive column 6 and the gun body 1, and a second bearing 29 is provided between the main shaft 4 and the gun body 1. The first bearing 28 has an interference fit with the hole wall of the drawing hole 101, and has a clearance fit with the outer wall of the conductive column 6; the second bearing 29 has an interference fit with the hole wall of the drawing hole 101, and has a clearance fit with the outer wall of the main shaft 4.

[0047] Preferably, in order to further ensure the smooth rotation and left and right movement of the main shaft 4, a third bearing 30 is provided on the main shaft 4 between the left wall of the cylinder 2 and the piston 21. The third bearing 30 has an interference fit with the inner wall of the cylinder 2 and a clearance fit with the outer wall of the main shaft 4.

[0048] Preferably, in order to further make the main shaft 4 rotate and move left and right smoothly, the main shaft 4 between the return spring 24 and the right side wall of the cylinder 2 is sleeved with a fourth bearing 36. The fourth bearing 36 has an interference fit with the inner wall of the cylinder 2 and a clearance fit with the outer wall of the main shaft 4.

[0049] Preferably, in order to prevent the return spring 24 from interfering with the rotation of the fourth bearing 36 , a spring sleeve 22 is movably provided on the main shaft 4 between the return spring 24 and the fourth bearing 36 .

[0050] Preferably, in order to facilitate the rotation of the conductive column 6 , a handle 17 is provided at one end of the conductive column 6 away from the gun body 1 .

[0051] Optionally, for the pressure regulating valve 8 provided with the pressure relief pipe 11 , the pressure relief pipe 11 of the pressure regulating valve 8 is connected to the solenoid valve 9 through the third connecting pipe 37 .

[0052] Here’s how this application works:

[0053] Turn on the power supply, clamp the conductive clamp of the electric welder on the conductive column, so that the air pipe is connected to the high-pressure gas; hold the handle; make the welding head contact with the surface of the area to be repaired, and under the action of the welding current of the electric welder, the welding head and the area to be repaired are welded together; turn the wrench to the right, and the wrench pushes the pushing block to move the toggle plate to the right, driving the pressure regulating shaft to rotate in the opposite direction, and the pressure regulating valve is opened. The high-pressure gas is injected into the air cavity through the second connecting pipe to push the piston to the right, and the main shaft drives the welding head to pull the area to be repaired. The greater the plate force, the greater the high-pressure gas pressure output by the pressure regulating valve. The operator can press the wrench with corresponding force according to actual needs. At the same time, the toggle plate pushes the pressure plate to move right. During the right movement of the pressure plate, press the switch button; completed After pulling, release the wrench, the pressure plate rebounds to the left and resets under the action of elastic force, and the push-pull plate moves left and resets, driving the pressure regulating shaft to rotate forward, so that the pressure regulating valve is closed, and the toggle plate pushes the pushing block to move the wrench left and reset. At the same time, the pressure plate releases the switch button, and the switch button pops up to trigger a start signal to the solenoid valve, which opens the exhaust chamber of the pressure regulating valve and the high-pressure air in the air cavity of the cylinder is released; after the preset time of the switch is reached, the switch sends a shutdown signal to the solenoid valve, and the solenoid valve is closed; because the high-pressure air in the air cavity is released, the piston moves left and resets under the action of the reset spring, driving the main shaft and the welding head to move left and reset, completing a pulling process; subsequently, the handle is rotated to separate the welding head from the area to be repaired; and this cycle repeats.

[0054] The above is a relatively specific and detailed description of the present application through general description 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; however, as long as they do not deviate from the technical concept of the present application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the scope of protection of the claims of the present application.

Claims

1. A pneumatic puller with a voltage regulating function, characterized in that, The invention comprises a gun body (1), a pressure regulating valve (8) and a solenoid valve (9); a cylinder (2) is arranged on the left side of the gun body (1); a handle (3) is arranged at the bottom of the assembly of the gun body (1) and the cylinder (2); a through drawing hole (101) is opened in the horizontal direction of the gun body (1); a conductive column (6) is movably arranged in the drawing hole (101); a main shaft (4) is fixedly arranged on the piston (21) of the cylinder (2); the left end of the main shaft (4) can be movably extended out of the left side wall of the cylinder (2), and a welding head (5) is arranged on the main shaft; the right end of the main shaft (4) can be movably extended out of the right side wall of the cylinder (2), and can movably pass through the drawing hole (101) to be connected with the left end of the conductive column (6); the right end of the conductive column (6) is extended out of the gun body (1), and its extended area is used to connect the wire ring of the electric welding machine; the main shaft (4) is provided with a welding head (5); the welding head (5 ... The cylinder (2) is provided with an air inlet (14) and a pressure relief port (13); the air inlet (14) and the pressure relief port (13) are both connected to the air cavity (23) of the cylinder (2); the outer sleeve of the main shaft (4) is provided with a return spring (24); the return spring (24) is located between the piston (21) of the cylinder (2) and the right side wall of the cylinder (2); the air outlet pipe (10) of the pressure regulating valve (8) is connected to the air inlet (14) through a second connecting pipe (16); the air inlet pipe (12) of the pressure regulating valve (8) is connected to an air pipe (18) for inputting high-pressure gas; the pressure relief port (13) is connected to the solenoid valve (9) through a first connecting pipe (15); and a pressure regulating device is also included, which is used to drive the pressure regulating shaft (31) of the pressure regulating valve (8) to rotate and provide the cylinder (2) with high-pressure gas of different pressures.

2. The pneumatic puller with a pressure regulating function according to claim 1, characterized in that The left side walls of the cylinder (2) on both sides of the main shaft (4) are provided with support rods (19), and the side of the support rod (19) away from the cylinder (2) is provided with a support seat (20).

3. The pneumatic puller with a voltage regulating function according to claim 2, wherein The pressure regulating device comprises a wrench (7), a toggle plate (33) and an elastic pressure plate (34); the upper part of the wrench (7) is hinged to the handle (3); one end of the toggle plate (33) is fixedly connected to the pressure regulating shaft (31) of the pressure regulating valve (8), and the other end is a free end; one end of the pressure plate (34) is fixedly connected to the handle (3), and the other end is a free end; the left side surface of the toggle plate (33) can contact the right side surface of the wrench (7); the left side surface of the pressure plate (34) can contact the right side surface of the toggle plate (33).

4. A pneumatic puller with a voltage regulating function according to claim 3, characterized in that, A push block (35) is provided on the left side of the toggle plate (33); the side surface of the push block (35) away from the toggle plate (33) can contact the right side surface of the wrench (7).

5. A pneumatic puller with a voltage regulating function according to claim 3 or 4, characterized in that The wrench (7) is fixedly provided with a switch (32); the switch (32) is electrically connected to the solenoid valve (9) and is used to control the opening and closing of the solenoid valve (9); the switch button (3201) of the switch (32) is located on the right side of the pressing plate (34) and can contact the right side of the pressing plate (34); the switch (32) is a timing switch.

6. The pneumatic puller with a voltage regulating function according to claim 5, characterized in that, The handle (3) comprises a bottom handle body (301) arranged on the combination of the gun body (1) and the cylinder (2) and a handle cover (302) arranged on the front side of the handle body (301); the handle body (301) is provided with a handle body groove on the side facing the handle cover (302); the handle cover (302) is provided with a handle cover groove on the side facing the handle body (301); the handle body groove and the handle cover groove form a handle chamber; the pressure regulating shaft (31) of the pressure regulating valve (8) can movably pass through the handle cover (302) and extend into the handle chamber; the toggle plate (33) is located in the handle chamber; the pressure plate (34) and the switch (32) are both arranged in the handle body groove; the right side of the wrench (7) can movably be embedded between the handle body (301) and the handle cover (302), and the left side extends out of the handle (3).

7. The pneumatic puller with a voltage regulating function according to claim 6, wherein, The outer wall of the piston (21) is sleeved with a first sealing ring (25) for sealing between the outer wall of the piston (21) and the inner wall of the cylinder (2); the left side wall of the cylinder (2) is embedded with a second sealing ring (27) for sealing between the outer wall of the main shaft (4) and the left side wall of the cylinder (2).

8. The pneumatic puller with a voltage regulating function according to claim 6, characterized in that, A first bearing (28) is provided between the conductive column (6) and the gun body (1); a second bearing (29) is provided between the main shaft (4) and the gun body (1); the first bearing (28) has an interference fit with the hole wall of the drawing hole (101) and has a clearance fit with the outer wall of the conductive column (6); the second bearing (29) has an interference fit with the hole wall of the drawing hole (101) and has a clearance fit with the outer wall of the main shaft (4).

9. The pneumatic puller with a voltage regulating function according to claim 8, characterized in that, The main shaft (4) between the left side wall of the cylinder (2) and the piston (21) is provided with a third bearing (30); the third bearing (30) is interference fit with the inner wall of the cylinder (2) and clearance fit with the outer wall of the main shaft (4).

10. The pneumatic puller with a voltage regulating function according to claim 9, characterized in that, A fourth bearing (36) is provided on the main shaft (4) between the return spring (24) and the right side wall of the cylinder (2); the fourth bearing (36) is interference fit with the inner wall of the cylinder (2) and clearance fit with the outer wall of the main shaft (4).

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