Puller convenient to adjust

Abstract

The utility model discloses a puller convenient to adjust. The puller comprises a pressurizing component and a pulling component, the clamping component comprises a threaded pipe arranged below the pressurizing component, one end of the threaded pipe is communicated with the pressurizing component, a positioning disc is arranged on the threaded pipe, a plurality of clamping jaws are distributed on the positioning disc, and each clamping jaw is rotationally connected with the positioning disc; the ejection component is arranged in the threaded pipe in a sliding mode, and the pressurizing component is used for driving the ejection component to eject downwards; the adjusting component comprises a fixing ring arranged on the pressurizing component, a lead screw is arranged on the fixing ring, one end of the lead screw is connected with an adjusting component, the adjusting component is arranged around the clamping jaws in a surrounding mode and applies pushing force to the clamping jaws, and a telescopic rod is further arranged between the fixing ring and the adjusting component and used for guiding the adjusting component to move; according to the utility model, the adjusting component is matched with the clamping component, and the rotating angle of each clamping jaw is controlled by changing the force application position of the adjusting component on each clamping jaw, so that each clamping jaw can be opened or clamped uniformly, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of maintenance tools, in particular to a puller which is easy to adjust. Background Art

[0002] Pullers are commonly used as auxiliary tools in the machinery repair industry, and are often used to disassemble mechanical parts such as gears, bearings, and pulleys. In the existing puller structure, each clamping jaw is usually fixed one by one with bolts. When disassembling gears of different specifications, the staff needs to adjust the clamping angle of each clamping jaw on the puller multiple times according to the diameter of the gear, and it is difficult to adjust the clamping angle of the clamping jaw again after it is fixed by bolts, which reduces the work efficiency. Therefore, the present application specifically proposes a puller that is convenient for uniformly adjusting the clamping angle of each clamping jaw. Utility Model Content

[0003] The main purpose of the utility model is to provide a puller which is convenient for uniformly adjusting the clamping angles of each clamping jaw.

[0004] To achieve the above object, the utility model provides a puller that is easy to adjust, comprising:

[0005] The pressurizing component includes a hydraulic component, a rocker is rotatably provided above the hydraulic component, and the rocker is used to pressurize the hydraulic component;

[0006] The clamping component comprises a threaded tube vertically arranged below the hydraulic component, one end of the threaded tube is connected to the hydraulic component, a positioning disk is threadedly arranged on the threaded tube, a plurality of clamping claws are circumferentially distributed on the positioning disk, and each of the clamping claws is rotatably connected to the positioning disk. Rotating the positioning disk can enable the positioning disk to drive each of the clamping claws to move vertically on the threaded tube;

[0007] An ejection component is slidably disposed in the threaded tube, and one end of the ejection component extends out of the threaded tube, and the hydraulic component is used to drive the ejection component to push downward;

[0008] The adjusting component includes a fixed ring arranged on the hydraulic component, a lead screw is arranged on the fixed ring for vertical rotation, one end of the lead screw passes through the fixed ring and is connected to the adjusting component, and the adjusting component is arranged around each of the clamping jaws and applies a thrust to each of the clamping jaws to move toward the center of the threaded tube, and the adjusting component is driven to move back and forth vertically by rotating the lead screw, so that the adjusting component applies a thrust at different positions of each of the clamping jaws to control the rotation angle of each of the clamping jaws, and a telescopic rod is also provided between the fixed ring and the adjusting component for guiding the vertical reciprocating movement of the adjusting component.

[0009] Furthermore, the adjusting member includes a ring slidably sleeved on the outside of each of the clamping jaws, the ring is connected to the end of the lead screw away from the rocker, and the ring is provided with a push plate corresponding to each of the clamping jaws, the push plate abuts against the corresponding clamping jaw and pushes the corresponding position of the clamping jaw to move toward the center direction of the threaded tube, a first elastic unit is provided between the push plate and the ring, and each of the first elastic units provides a thrust toward the center direction of the threaded tube for the corresponding push plate, and a plurality of guide blocks are provided on a side of the ring close to the clamping jaw, and each of the guide blocks is respectively arranged on both sides of the corresponding clamping jaw, and when the first elastic unit pushes the corresponding push plate out of the ring, each of the guide blocks is used to constrain the moving direction of the corresponding push plate.

[0010] Furthermore, the hydraulic component includes an oil tank arranged below the rocker arm, the oil tank is used to store hydraulic oil, and one end of the rocker arm is rotatably arranged on the oil tank, a boosting chamber is provided at the center of the oil tank, a piston is slidably arranged in the boosting chamber, and the piston is dynamically sealed with the boosting chamber, one end of the piston is rotatably connected to the rocker arm, an oil inlet pipe is provided at the bottom end of the boosting chamber, the oil inlet of the oil inlet pipe is connected to the oil tank, the oil outlet of the oil inlet pipe is connected to the boosting chamber, and a first one-way valve is provided on the oil outlet of the oil inlet pipe, the first one-way valve is used to introduce hydraulic oil into the boosting chamber and prevent the hydraulic oil in the boosting chamber from flowing back to the oil tank, and the inlet An oil outlet pipe is provided on one side of the oil pipe, and the oil inlet of the oil outlet pipe is communicated with the boosting chamber, the oil outlet of the oil outlet pipe is communicated with the inner cavity of the threaded pipe, and a second one-way valve is provided on the oil outlet of the oil outlet pipe, the second one-way valve is used to introduce hydraulic oil into the threaded pipe and prevent the hydraulic oil in the threaded pipe from flowing back into the boosting chamber. When it is necessary to push the ejection component, the piston is driven to move upward by the rocker arm, and the hydraulic oil in the oil tank flows into the boosting chamber through the first one-way valve. At this time, the rocker arm drives the piston to move downward, and the hydraulic oil in the boosting chamber flows into the cavity of the threaded pipe through the second one-way valve and pushes the ejection component downward.

[0011] Further, the ejection component includes a first ejector rod vertically slidably arranged in the inner cavity of the threaded tube, and the first ejector rod is dynamically sealed with the threaded tube, a second ejector rod is threadedly inserted in the first ejector rod, and the end of the second ejector rod away from the rocker extends out of the first ejector rod, and an adjustment component is also provided at the extended end of the second ejector rod. When the first ejector rod moves downward to a maximum value but does not abut on the positioning member, the second ejector rod is screwed out of the first ejector rod by the adjustment component to increase the downward movement distance of the ejection component.

[0012] Furthermore, two first grooves arranged opposite to each other are formed on the extended end of the second push rod, and a second groove is formed on a side of the bottom end of each of the first grooves close to the outer wall of the second push rod;

[0013] The adjusting member includes a rotating rod rotatably arranged in each of the first grooves, a torsion spring is provided at the rotating joint of the rotating rod, and the torsion spring is used to drive the corresponding rotating rod to rotate away from the center of the second top rod, one side of the bottom end of each rotating rod abuts against a sliding plate, and each sliding plate is vertically slidably arranged in the second groove, the sliding plate is used to constrain the rotation of the rotating rod, and a second elastic unit is also provided between the sliding plate and the corresponding second groove, a sliding ring is provided around the protruding end of the second top rod, and the sliding ring is connected to each sliding plate, when the rotating rod needs to be used, each sliding plate is retracted into the corresponding second groove through the sliding ring, and each rotating rod loses the constraint of the corresponding sliding plate and rotates away from the center of the second top rod through the torsion of the torsion spring.

[0014] Furthermore, the oil tank is also provided with an oil return component, which includes an oil return pipe arranged on one side of the oil tank, the oil inlet of the oil return pipe is connected to the inner cavity of the threaded pipe, the oil outlet of the oil return pipe is connected to the oil tank, and a check rod is also provided near the oil inlet of the oil return pipe, one end of the check rod is threadedly connected to the oil return pipe, and the other end extends out of the oil return pipe, and a dynamic seal is cooperated between the extended end of the check rod and the oil return pipe. When it is necessary to reset the first push rod, the check rod is rotated to move the check rod away from the oil inlet of the oil return pipe. At this time, the oil return pipe is opened, which facilitates the return of hydraulic oil into the oil tank.

[0015] The beneficial effects of the utility model are embodied in:

[0016] The utility model cooperates with the adjusting component and the clamping component to uniformly control the rotation angle of each clamping jaw by changing the force application position of the adjusting component on each clamping jaw, so that each clamping jaw can be opened or clamped uniformly. The setting of the adjusting component is convenient for re-adjusting each clamping jaw, thereby increasing work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional view of the front side of the puller that is easy to adjust according to the utility model;

[0018] Figure 2 It is a cross-sectional view of the puller that is easy to adjust according to the utility model;

[0019] Figure 3 yes Figure 2 Magnified view at A in the middle;

[0020] Figure 4It is a side sectional view of the adjustable puller of the utility model;

[0021] Figure 5 yes Figure 4 Magnified view at B in the middle;

[0022] Figure 6 yes Figure 4 Enlarged view at center C;

[0023] Figure 7 It is a structural view of the regulating component.

[0024] Description of reference numerals:

[0025] 1. Pressurizing component; 11. Hydraulic component; 111. Oil tank; 112. Pressurizing chamber; 113. Piston; 114. Oil inlet pipe; 115. First one-way valve; 116. Oil outlet pipe; 117. Second one-way valve; 12. Rocker; 2. Clamping component; 21. Threaded pipe; 22. Positioning plate; 23. Clamping claw; 3. Ejecting component; 31. First ejector rod; 32. Second ejector rod; 321. First groove; 322. Second groove; 33. Adjusting component; 331. Rotating rod; 332. Sliding plate; 333. Second elastic unit; 334. Sliding ring; 4. Adjusting component; 41. Fixed ring; 42. Lead screw; 43. Adjusting component; 431. Holding ring; 432. Push plate; 433. First elastic unit; 434. Guide block; 44. Telescopic rod; 5. Oil return component; 51. Oil return pipe; 52. Check rod. Specific implementation plan

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other.

[0027] See also Figure 1-Figure 7 .

[0028] The utility model discloses a puller which is easy to adjust, comprising:

[0029] The pressurizing component 1 comprises a hydraulic component 11, a rocker 12 is rotatably provided above the hydraulic component 11, and the rocker 12 is used to pressurize the hydraulic component 11;

[0030] The clamping component 2 includes a threaded tube 21 vertically arranged below the hydraulic component 11, one end of the threaded tube 21 is connected to the hydraulic component 11, a positioning plate 22 is threadedly arranged on the threaded tube 21, a plurality of clamping jaws 23 are circumferentially distributed on the positioning plate 22, and each clamping jaw 23 is rotatably connected to the positioning plate 22. Rotating the positioning plate 22 can make the positioning plate 22 drive each clamping jaw 23 to move vertically on the threaded tube 21;

[0031] The ejection component 3 is slidably disposed in the threaded tube 21, and one end of the ejection component 3 extends out of the threaded tube 21. The hydraulic component 11 is used to drive the ejection component 3 to push downward;

[0032] The adjusting component 4 includes a fixed ring 41 arranged on the hydraulic component 11, and a lead screw 42 is vertically rotatably arranged on the fixed ring 41. One end of the lead screw 42 passes through the fixed ring 41 and is connected to an adjusting component 43. The adjusting component 43 is arranged around each clamping jaw 23 and applies a thrust to each clamping jaw 23 to move toward the center of the threaded tube 21. The adjusting component 43 is driven to move back and forth vertically by rotating the lead screw 42, so that the adjusting component 43 applies a thrust at different positions of each clamping jaw 23 to control the rotation angle of each clamping jaw 23. A telescopic rod 44 is also provided between the fixed ring 41 and the adjusting component 43 for guiding the vertical reciprocating movement of the adjusting component 43.

[0033] In specific implementation, when it is necessary to disassemble the part to be disassembled set on the positioning member, the staff will align the ejection member 3 with the axis of the part to be disassembled, rotate the screw 42 to drive the adjusting member 43 to move upward and pass through the rotating joint between each clamping jaw 23 and the positioning plate 22. At this time, the adjusting member 43 applies pressure to the end of each clamping jaw 23 close to the rocker 12 toward the center of the threaded tube 21. At this time, each clamping jaw 23 opens. When the clamping member 2 is adjusted to a suitable position, the screw 42 is reversed to move the adjusting member 43 downward and adjust each clamping jaw 23. The end of the claw 23 away from the rocker 12 applies pressure to the center of the threaded tube 21. At this time, the claws 23 are retracted and clamp the part to be disassembled. The staff drives the hydraulic component 11 to work through the rocker 12, so that the hydraulic component 11 drives the ejection component 3 to move downward until the ejection component 3 abuts against the axis passing through the part to be disassembled and abuts against the fixed surface of the positioning component. At this time, the rocker 12 is continued to be shaken, and the clamping component 2 is subjected to the reaction force of the ejection component 3 continuing to move downward, driving the part to be disassembled to rise until the part to be disassembled is removed from the positioning component.

[0034] In the present invention, the adjusting component 4 cooperates with the clamping component 2 to uniformly control the rotation angle of each clamping jaw 23 by changing the force application position of the adjusting component 43 on each clamping jaw 23, so that each clamping jaw 23 can be uniformly opened or clamped. The setting of the adjusting component 4 is convenient for re-adjusting each clamping jaw 23, thereby increasing work efficiency.

[0035] In one embodiment, the adjusting member 43 includes a ring 431 slidably mounted on the outside of each clamping jaw 23, the ring 431 is connected to the end of the lead screw 42 away from the rocker 12, and the ring 431 is provided with a push plate 432 corresponding to each clamping jaw 23, the push plate 432 abuts against the corresponding clamping jaw 23 and pushes the corresponding position of the clamping jaw 23 to move toward the center direction of the threaded tube 21, and a first elastic unit 433 is provided between the push plate 432 and the ring 431, and each first elastic unit 433 provides a thrust toward the center direction of the threaded tube 21 for the corresponding push plate 432, and a plurality of guide blocks 434 are provided on a side of the ring 431 close to the clamping jaw 23, and each guide block 434 is respectively arranged on both sides of the corresponding clamping jaw 23, and when the first elastic unit 433 pushes the corresponding push plate 432 out of the ring 431, each guide block 434 is used to constrain the moving direction of the corresponding push plate 432.

[0036] With this design, when preparing to position the part to be disassembled, the screw 42 is rotated to drive the holding ring 431 to move upward, and each push plate 432 always abuts against the end of the corresponding clamping jaw 23 close to the rocker 12 through the thrust of the corresponding first elastic unit 433, and applies a thrust toward the center of the threaded tube 21. At this time, the other end of the clamping jaw 23 is away from the center of the threaded tube 21, and each clamping jaw 23 is open, which is convenient for the staff to position the part to be disassembled. At this time, each clamping jaw 23 is located around the part to be disassembled. When it is necessary to clamp the part to be disassembled, the screw 42 is rotated to drive the holding ring 431 to move downward, and each push plate 432 moves downward with the holding ring 431 and applies a thrust toward the center of the threaded tube 21 to the end of the corresponding clamping jaw 23 away from the rocker 12 through the corresponding first elastic unit 433 until each clamping jaw 23 clamps the outer wall of the part to be disassembled.

[0037] Preferably, the first elastic unit 433 may use a spring in the prior art.

[0038] In one embodiment, the hydraulic component 11 includes an oil tank 111 arranged below the rocker 12, the oil tank 111 is used to store hydraulic oil, and one end of the rocker 12 is rotatably arranged on the oil tank 111, a boosting chamber 112 is provided at the center of the oil tank 111, a piston 113 is slidably arranged in the boosting chamber 112, and the piston 113 is dynamically sealed with the boosting chamber 112, one end of the piston 113 is rotatably connected to the rocker 12, an oil inlet pipe 114 is provided at the bottom end of the boosting chamber 112, an oil inlet of the oil inlet pipe 114 is connected to the oil tank 111, an oil outlet of the oil inlet pipe 114 is connected to the boosting chamber 112, and a first one-way valve 115 is provided on the oil outlet of the oil inlet pipe 114, the first one-way valve 115 is used to introduce hydraulic oil into the boosting chamber 112 and prevent the hydraulic oil in the boosting chamber 112 from returning Flows into the oil tank 111, an oil outlet pipe 116 is provided on one side of the oil inlet pipe 114, and the oil inlet of the oil outlet pipe 116 is communicated with the boosting chamber 112, the oil outlet of the oil outlet pipe 116 is communicated with the inner cavity of the threaded tube 21, and a second one-way valve 117 is provided on the oil outlet of the oil outlet pipe 116, the second one-way valve 117 is used to introduce the hydraulic oil into the threaded tube 21 and prevent the hydraulic oil in the threaded tube 21 from flowing back into the boosting chamber 112. When it is necessary to push the ejection component 3, the piston 113 is driven to move upward by the rocker arm 12, and the hydraulic oil in the oil tank 111 flows into the boosting chamber 112 through the first one-way valve 115. At this time, the rocker arm 12 drives the piston 113 to move downward, and the hydraulic oil in the boosting chamber 112 flows into the cavity of the threaded tube 21 through the second one-way valve 117 and pushes the ejection component 3 downward.

[0039] With this design, when it is necessary to disassemble the part to be disassembled, the piston 113 is driven to move upward by shaking the rocker 12. At this time, the hydraulic oil in the oil tank 111 enters the oil inlet pipe 114 and flows into the boosting chamber 112 through the first one-way valve 115, and the internal pressure of the boosting chamber 112 increases. When the piston 113 moves downward, the hydraulic oil in the boosting chamber 112 is pressurized and flows into the oil outlet pipe 116 and flows into the inner cavity of the threaded tube 21 through the second one-way valve 117. As the piston 113 continues to reciprocate up and down, the hydraulic oil in the inner cavity of the threaded tube 21 pushes the ejection component 3 downward until the ejection component 3 passes through the axis of the part to be disassembled and abuts against the fixed surface of the part to be disassembled. At this time, continue to shake the rocker 12 to make the piston 113 work, and the hydraulic oil in the inner cavity of the threaded tube 21 continues to increase, causing the threaded tube 21 and the ejection component 3 to move relative to each other, thereby moving the clamping component 2 upward to pull out the part to be disassembled.

[0040] In one embodiment, the ejection component 3 includes a first ejector rod 31 vertically slidably arranged in the inner cavity of the threaded tube 21, and the first ejector rod 31 is dynamically sealed with the threaded tube 21. A second ejector rod 32 is threadedly inserted in the first ejector rod 31, and the end of the second ejector rod 32 away from the rocker arm 12 extends out of the first ejector rod 31. An adjusting component 33 is also provided at the extended end of the second ejector rod 32. When the first ejector rod 31 moves downward to the maximum value but does not abut on the positioning member, the second ejector rod 32 is screwed out of the first ejector rod 31 by the adjusting component 33 to increase the downward moving distance of the ejection component 3.

[0041] With this design, since there are many types and specifications of parts to be disassembled, the distance depth between the bearing position and the shaft section of each part to be disassembled is different. When the bearing position depth is deeper, it is difficult for the first push rod 31 to abut against the surface of the positioning part. The second push rod 32 is rotated out of the first push rod 31 by adjusting the component 33 so that the second push rod 32 compensates for the distance between the first push rod 31 and the positioning part until the abutment head of the second push rod 32 abuts against the surface of the positioning part.

[0042] In one embodiment, the second top rod 32 has two first grooves 321 disposed opposite to each other on its protruding end, and a second groove 322 is disposed on one side of the bottom end of each first groove 321 close to the outer wall of the second top rod 32;

[0043] The cam 332 is used to move the cam 331 upwards and downwards to move the cam 332 out of the way so that the cam 331 can move freely.

[0044] When the second push rod 32 is rotated to the desired length, the sliding ring 334 is pressed downwardly again to retract the sliding plate 332 into the corresponding second groove 322, and then the rotating rod 331 is pressed downwardly to make the rotating rod 331 enter the corresponding first groove 321. At this time, the torsion springs are compressed, and the sliding ring 334 is released. The second elastic unit 333 loses its constraint and drives the corresponding sliding plate 332 to move upward and constrain the rotating rod 331 to rotate, thereby preventing the rotating rod 331 from extending out of the second push rod 32 and interfering with the gap between the second push rod 32 and the bearing hole of the part to be disassembled.

[0045] In one embodiment, an oil return component 5 is further provided on the oil tank 111, and the oil return component 5 includes an oil return pipe 51 arranged on one side of the oil tank 111, the oil inlet of the oil return pipe 51 is connected to the inner cavity of the threaded pipe 21, and the oil outlet of the oil return pipe 51 is connected to the oil tank 111, and a check rod 52 is also provided near the oil inlet of the oil return pipe 51, one end of the check rod 52 is threadedly connected to the oil return pipe 51, and the other end extends out of the oil return pipe 51, and a dynamic seal is cooperated between the extended end of the check rod 52 and the oil return pipe 51. When it is necessary to reset the first push rod 31, the check rod 52 is rotated to move the check rod 52 away from the oil inlet of the oil return pipe 51. At this time, the oil return pipe 51 is opened, which facilitates the hydraulic oil to flow back into the oil tank 111.

[0046] With this design, when the to-be-disassembled component is disassembled, the check rod 52 is rotated to move the check rod 52 away from the oil inlet of the return oil pipe 51. At this time, the return oil pipe 51 is opened, and the staff applies force to move the ejection component 3 upward. The hydraulic oil in the threaded tube 21 is squeezed by the ejection component 3 and flows into the return oil pipe 51 and into the oil tank 111 until the ejection component 3 is completely reset. When the ejection component 3 is reset, the check rod 52 is reversed so that the check rod 52 is screwed together with the return oil pipe 51 again to stop the return oil pipe 51 from delivering oil.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. In addition, "multiple", "multiple groups", and "several" refer to more than two.

Claims

1. A puller that is easy to adjust, characterized in that: include: A pressurizing component (1) comprises a hydraulic component (11), a rocker (12) being rotatably provided above the hydraulic component (11), and the rocker (12) being used to pressurize the hydraulic component (11); The clamping component (2) comprises a threaded tube (21) vertically arranged below the hydraulic component (11), one end of the threaded tube (21) being connected to the hydraulic component (11), a positioning disk (22) being threadedly arranged on the threaded tube (21), a plurality of clamping jaws (23) being circumferentially distributed on the positioning disk (22), and each of the clamping jaws (23) being rotatably connected to the positioning disk (22), and rotating the positioning disk (22) can cause the positioning disk (22) to drive each of the clamping jaws (23) to move vertically on the threaded tube (21); An ejection component (3) is slidably disposed in the threaded tube (21), and one end of the ejection component (3) extends out of the threaded tube (21), and the hydraulic component (11) is used to drive the ejection component (3) to move downward; The adjusting component (4) comprises a fixing ring (41) arranged on the hydraulic component (11), a lead screw (42) being arranged on the fixing ring (41) for vertical rotation, one end of the lead screw (42) passing through the fixing ring (41) and connected to an adjusting component (43), and the adjusting component (43) is arranged around each of the clamping jaws (23) and applies a thrust to each of the clamping jaws (23) to move toward the center of the threaded tube (21), and the adjusting component (43) is driven to move vertically back and forth by rotating the lead screw (42), so that the adjusting component (43) applies a thrust at different positions of each of the clamping jaws (23) to control the rotation angle of each of the clamping jaws (23), and a telescopic rod (44) is also provided between the fixing ring (41) and the adjusting component (43) for guiding the adjusting component (43) to move vertically back and forth.

2. The adjustable puller according to claim 1, characterized in that: The regulating member (43) comprises a ring (431) slidably mounted on the outside of each of the clamping jaws (23); the ring (431) is connected to an end of the lead screw (42) away from the rocker (12); a push plate (432) is provided at a position of the ring (431) corresponding to each of the clamping jaws (23); the push plate (432) abuts against the corresponding clamping jaw (23) and pushes the corresponding position of the clamping jaw (23) to move toward the center direction of the threaded tube (21); a first elastic unit (432) is provided between the push plate (432) and the ring (431) 433), each of the first elastic units (433) provides a thrust toward the center direction of the threaded tube (21) for the corresponding push plate (432), a plurality of guide blocks (434) are provided on a side of the holding ring (431) close to the clamping jaw (23), and each of the guide blocks (434) is respectively arranged on both sides of the corresponding clamping jaw (23), when the first elastic unit (433) pushes the corresponding push plate (432) out of the holding ring (431), each of the guide blocks (434) is used to constrain the moving direction of the corresponding push plate (432).

3. The adjustable puller according to claim 1, characterized in that: The hydraulic component (11) comprises an oil tank (111) arranged below the rocking arm (12), the oil tank (111) being used to store hydraulic oil, and one end of the rocking arm (12) being rotatably arranged on the oil tank (111), a pressurizing chamber (112) being arranged at the center of the oil tank (111), a piston (113) being slidably arranged in the pressurizing chamber (112), and the piston (113) being dynamically sealed with the pressurizing chamber (112), and one end of the piston (113) being rotatably sealed with the rocking arm (12), 12) is rotatably connected, an oil inlet pipe (114) is provided at the bottom end of the boosting chamber (112), an oil inlet of the oil inlet pipe (114) is connected to the oil tank (111), an oil outlet of the oil inlet pipe (114) is connected to the boosting chamber (112), and a first one-way valve (115) is provided on the oil outlet of the oil inlet pipe (114), the first one-way valve (115) is used to introduce hydraulic oil into the boosting chamber (112) and prevent the hydraulic oil in the boosting chamber (112) from flowing back to the oil tank (111 ), an oil outlet pipe (116) is provided on one side of the oil inlet pipe (114), and the oil inlet of the oil outlet pipe (116) is communicated with the pressurizing chamber (112), the oil outlet of the oil outlet pipe (116) is communicated with the inner cavity of the threaded pipe (21), and a second one-way valve (117) is provided on the oil outlet of the oil outlet pipe (116), and the second one-way valve (117) is used to introduce hydraulic oil into the threaded pipe (21) and prevent the hydraulic oil in the threaded pipe (21) from flowing back into the pressurizing chamber (112). ), when it is necessary to push the ejection component (3), the piston (113) is driven to move upward by the rocker arm (12), and the hydraulic oil in the oil tank (111) flows into the boosting chamber (112) through the first one-way valve (115). At this time, the rocker arm (12) drives the piston (113) to move downward, and the hydraulic oil in the boosting chamber (112) flows into the cavity of the threaded tube (21) through the second one-way valve (117) and pushes the ejection component (3) downward.

4. The easily adjustable puller according to claim 3, characterized in that: The ejection component (3) comprises a first ejector rod (31) vertically slidably arranged in the inner cavity of the threaded tube (21), and the first ejector rod (31) is dynamically sealed with the threaded tube (21). A second ejector rod (32) is threadedly inserted in the first ejector rod (31), and the end of the second ejector rod (32) away from the rocker (12) extends out of the first ejector rod (31). An adjustment component (33) is also provided at the extended end of the second ejector rod (32). When the first ejector rod (31) moves downward to a maximum value but does not abut against the positioning member, the second ejector rod (32) is screwed out of the first ejector rod (31) by the adjustment component (33) to increase the downward movement distance of the ejection component (3).

5. The easily adjustable puller according to claim 4, characterized in that: The extended end of the second push rod (32) is provided with two first grooves (321) arranged opposite to each other, and a second groove (322) is provided on a side of the bottom end of each first groove (321) close to the outer wall of the second push rod (32); The adjusting member (33) comprises a rotating rod (331) rotatably arranged in each of the first grooves (321); a torsion spring is arranged at a rotating joint of the rotating rod (331); the torsion spring is used to drive the corresponding rotating rod (331) to rotate away from the center of the second top rod (32); one side of the bottom end of each rotating rod (331) is abutted against a sliding plate (332); and each sliding plate (332) is vertically slidably arranged in the second groove (322); the sliding plate (332) is used to constrain the rotation of the rotating rod (331); the sliding plate (332) and the A second elastic unit (333) is also provided between the corresponding second grooves (322); a sliding ring (334) is provided around the protruding end of the second push rod (32), and the sliding ring (334) is connected to each sliding plate (332); when the rotating rod (331) needs to be used, each sliding plate (332) is retracted into the corresponding second groove (322) through the sliding ring (334), and each rotating rod (331) loses the constraint of the corresponding sliding plate (332) and rotates away from the center of the second push rod (32) through the torsion of the torsion spring.

6. The easily adjustable puller according to claim 4, characterized in that: The oil tank (111) is also provided with an oil return component (5), the oil return component (5) comprising an oil return pipe (51) arranged on one side of the oil tank (111), the oil inlet of the oil return pipe (51) being in communication with the inner cavity of the threaded pipe (21), the oil outlet of the oil return pipe (51) being in communication with the oil tank (111), and a check rod (52) being provided near the oil inlet of the oil return pipe (51), one end of the check rod (52) being in communication with the inner cavity of the threaded pipe (21). The oil return pipe (51) is threadedly connected, and the other end extends out of the oil return pipe (51), and a dynamic seal is formed between the extended end of the check rod (52) and the oil return pipe (51). When it is necessary to reset the first push rod (31), the check rod (52) is rotated to move the check rod (52) away from the oil inlet of the oil return pipe (51). At this time, the oil return pipe (51) is opened, so that the hydraulic oil can flow back into the oil tank (111) conveniently.

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