A small wheel puller

Abstract

The utility model relates to the field of mechanical equipment maintenance especially relates to a small -size wheel puller, including base, the middle of base is provided with the screw hole that goes through up and down, the main rod is screwed in the screw hole, the both sides of screw hole are equipped with the guide hole that also goes through up and down, the pull -out screw rod is provided in each guide hole, the pull -out screw rod bottom is equipped with first hook part, still be equipped with two adjusting holes on base, two adjusting holes are equipped with the rotating rod that length direction is perpendicular to pull -out screw rod, rotating rod one end swing joint with base, the other end passes through base side wall and then extends to base outside, be equipped with mobile seat on rotating rod, mobile seat includes rotary joint part and screw rod connecting part, rotary joint part is covered outside rotating rod, with rotating rod screw connection, screw rod connecting part is covered outside pull -out screw rod, with pull -out screw rod screw connection.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment maintenance, and in particular to a small puller. Background Technology

[0002] In the field of mechanical repair and assembly, it is often necessary to remove various wheel-shaped components, such as pulleys, gears, couplings, or bearings, from shafts or bearing housings. Traditional wheel pullers have many shortcomings, such as limited applicability, difficulty in using them universally for wheel-shaped components of different sizes and shapes; complex operation, requiring more manpower and time to complete the disassembly work; and some wheel pullers cannot be used properly in confined spaces or special working conditions.

[0003] Utility model patent CN219747856U discloses a two-jaw puller with adjustable puller length and spacing for disassembling bearings. It includes a crossbeam, two puller screws, and a top-pressing screw. A threaded hole is provided in the middle of the crossbeam, and the top-pressing screw is screwed into the threaded hole. Two strip-shaped holes are provided on the crossbeam, located on opposite sides of the threaded hole. Each strip-shaped hole contains a puller screw, which can move within the strip-shaped hole and is fixed by adjusting and locking nuts. A hook is provided at the lower end of each puller screw. However, this puller lacks lateral resistance to the bearing being disassembled, and the position adjustment of the two puller screws is not precise enough. Furthermore, when the bearing is connected to a bearing housing and the puller screw needs to rotate to connect to the bearing's inner bore end face, the top-pressing screw lacks a support point, thus preventing the bearing from being removed from the bearing housing. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a small puller that has a lateral clamping force on the parts to be disassembled and moves accurately.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A small puller includes a base with a through-hole in the center. A main rod is screwed into the through-hole. Guide holes with similar through-holes are provided on both sides of the threaded hole. A puller screw is provided in each guide hole. The puller screw has a first hook at its bottom. The base also has two adjustment holes. Each adjustment hole has a rotating rod whose length direction is perpendicular to the puller screw. One end of the rotating rod is movably connected to the base, and the other end extends outward from the base after passing through the side wall of the base. A movable seat is provided on the rotating rod. The movable seat includes a rotating connecting part and a screw connecting part. The rotating connecting part is sleeved on the outside of the rotating rod and threadedly connected to the rotating rod. The screw connecting part is sleeved on the outside of the puller screw and threadedly connected to the puller screw.

[0007] The aforementioned small puller has a bearing at the lower end of the main rod, a rotating seat on the outside of the bearing, a pull claw seat detachably connected to the outside of the rotating seat, a rotating shaft at the lower part of the pull claw seat, two scissor pull claws rotatably connected to the center of the rotating shaft, and a second hook at the lower part of the two scissor pull claws, the second hook being located on the side near the puller screw.

[0008] In the aforementioned small puller, the upper part of the scissor claw is an adjustment part, and an adjustment bolt is threadedly connected to the adjustment part of one of the scissor claws. One end of the adjustment bolt is in contact with the adjustment part of the other scissor claw.

[0009] In the aforementioned small puller, the bottom end face of the first hook is a horizontal plane.

[0010] The beneficial effects of adopting the above technical solution are as follows:

[0011] This invention features an adjustment hole on the base, within which a rotating rod perpendicular to the puller screw is installed. The rotating rod and puller screw are connected via a rotating connecting part and a screw connecting part of the movable base, respectively. Rotating the rotating rod causes the puller screw to move horizontally, changing the distance between the two puller screws to accommodate components with different outer diameters. The movable base provides lateral resistance to the puller screws, reducing the shaking of the components during disassembly. Additionally, a bearing and a rotating base are located at the lower end of the main rod. When the main rod rotates, the rotating base presses against the central shaft, reducing friction between the main rod and the central shaft during rotation. A claw seat is connected to the outer side of the rotating base, with two scissor claws. These claws allow for the disassembly of components whose outer diameter is tightly fitted to other parts. Adjusting bolts on the scissor claws allow for adjustment of the opening degree of the two claws, accommodating components with different inner diameters. Attached Figure Description

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model (not drawn to scale);

[0014] Figure 2 This is a schematic diagram of the structure of the pull screw, rotating rod and moving seat in this utility model (not drawn to scale);

[0015] Figure 3 This is a sectional view of the pull claw seat portion of this utility model (not drawn to scale).

[0016] In the diagram: 1. Base; 11. Guide hole; 12. Adjustment hole; 2. Main rod; 3. Pulling screw; 31. First hook; 4. Rotating rod; 41. Handheld part; 5. Moving seat; 51. Rotating connection part; 52. Screw connection part; 6. Bearing; 7. Rotating seat; 8. Pull claw seat; 81. Adapter part; 82. Pull claw connection part; 83. Rotating shaft; 9. Scissor pull claw; 91. Second hook; 92. Adjustment part; 93. Adjustment bolt. Detailed Implementation

[0017] like Figure 1-3 As shown, in one embodiment of this utility model, a small puller includes a base 1. A threaded hole extending vertically is provided in the center of the base 1, and a main rod 2 is screwed into the threaded hole. Guide holes 11 extending vertically are provided on both sides of the threaded hole. A puller screw 3 is provided in each guide hole 11. A first hook 31 is provided at the bottom of the puller screw 3, which is used to connect to the outer circumferential sidewall of the component to be disassembled. The base 1 also has two adjustment holes 12 located on the sidewall of the base. Each adjustment hole 12 contains a rotating rod 4 whose length direction is perpendicular to the puller screw. One end of the rotating rod 4 is movably connected to the base 1, and the other end passes through the sidewall of the base 1 and extends downwards. The base 1 extends outward and is provided with a handheld part 41. The rotating rod 4 is provided with a movable seat 5. The movable seat 5 includes a rotating connecting part 51 and a screw connecting part 52. The rotating connecting part 51 is sleeved on the outside of the rotating rod 4 and threadedly connected to the rotating rod 4. The screw connecting part 52 is sleeved on the outside of the puller screw 3 and threadedly connected to the puller screw 3. The rotating rod 4 drives the puller screw 3 to move horizontally, precisely controlling the movement position of the puller screw 3. When the puller screw 3 contacts the disassembly part, the rotating rod 4 continues to rotate, and the movable seat 5 can form a lateral resistance force on the puller screw 3. The two puller screws 3 respectively clamp the left and right sides of the part to be disassembled, which can reduce the shaking of the part to be disassembled during the disassembly process.

[0018] In addition, the puller screw 3 is threadedly connected to the screw connection part 52, which can adjust the length of the part of the puller screw 3 below the base 1, adjust the direction of the first hook part 31 of the puller screw 3, and fix the puller screw 3.

[0019] like Figure 2 As shown, the lower end of the main rod 2 is provided with a bearing 6, and a rotating seat 7 is provided on the outside of the bearing 6. The rotating seat 7 is detachably connected to a claw seat 8. When the inner circle of the part to be disassembled is tightly connected to other parts and the pull screw 3 is needed to disassemble it, the claw seat 8 can be removed.

[0020] More specifically, the claw seat 8 includes an adapter part 81 and a claw connecting part 82. The adapter part 81 is connected to the rotating seat 7. The rotating seat 7 is symmetrically provided with insertion holes, and the claw seat 8 is symmetrically provided with through holes. By inserting a rod through the through hole and then inserting it into the insertion hole, the rotating seat 7 and the claw seat 8 can be detachably connected.

[0021] In another embodiment of the present invention, the claw seat 8 includes an adapter part 81 and a claw connecting part 82. The adapter part 81 is connected to the rotating seat 7. The rotating seat 7 is provided with an external thread, and the claw seat 8 is provided with an internal thread that mates with it. The detachable connection between the rotating seat 7 and the claw seat 8 can also be achieved through the thread.

[0022] like Figure 1 , 3 As shown, a rotating shaft 83 is provided on the claw connecting part 82 at the lower part of the claw seat 8. Two scissor claws 9 are rotatably connected to the center of the rotating shaft 83. The lower part of the two scissor claws 9 is provided with a second hook part 91. The second hook part 91 is located on the side close to the pull screw 3 and is used to connect to the inner end face of the component to be disassembled.

[0023] like Figure 3 As shown, the upper part of the scissor claw 9 is an adjustment part 92. An adjustment bolt 93 is threadedly connected to the adjustment part 92 of one of the scissor claws 9. One end of the adjustment bolt 93 is in contact with the adjustment part 92 of the other scissor claw 9. By rotating the adjustment bolt 93, the length of the adjustment bolt 93 located in the middle part of the two scissor claws 9 can be adjusted, thereby changing the opening degree of the two scissor claws 9 so that it can adapt to the disassembled parts with different inner diameters.

[0024] like Figure 2 As shown, the bottom end face of the first hook 31 is a horizontal plane. When the component is disassembled using the scissor claw 9, the pull screw 3 can be used to press against the fasteners on the outside of the component being disassembled, such as bearing seats.

[0025] In one embodiment, the top end of the main rod 2 is provided with a through hole, and the rotating rod is located in the through hole to form a rotating handle. By rotating the rotating rod, the main rod 2 can be driven to rotate, so that it rises or falls relative to the base 1.

[0026] In another embodiment, the top of the main rod 2 is provided with a square edge to facilitate wrench clamping, so that the wrench can replace the rotating rod to drive the main rod 2 to rotate, causing it to rise or fall relative to the base 1.

[0027] When the inner circle of the component to be disassembled is tightly connected to other components, such as the connection between a bearing and a shaft, the pull claw seat 8 needs to be removed. Rotate the main rod 2 so that the rotating seat 7 under the main rod 2 presses against the central shaft. Adjust the length of the two pull screws 3 so that the upper end face of their first hook 31 is below the component to be disassembled. Rotate the handle 41 of the rotating rod 4 to drive the moving seat 5 to move horizontally, which in turn drives the pull screws 3 to move horizontally, bringing them closer to the component to be disassembled. Continue to rotate the rotating rod 4 until the pull screws 3 press against the outer circle side wall of the component to be disassembled. The two pull screws 3 clamp the left and right sides of the component to be disassembled respectively. Then continue to rotate the main rod 2. The base 1 drives the pull screws 3 and the clamped component to be disassembled to rise, thereby removing the bearing from the shaft.

[0028] When the outer circle of the component to be disassembled is tightly connected to other components, such as the connection between a bearing and a bearing housing, it is necessary to assemble the pull claw seat 8, rotate the main rod 2 to drive the two scissor pull claws 9 to descend, so that they are located in the middle of the inner hole of the component to be disassembled. Then rotate the adjusting bolt 93 to lengthen the part of the adjusting bolt 93 located in the middle of the two scissor pull claws 9, thereby increasing the opening and closing degree of the two scissor pull claws 9, so that the second hook part 91 is pressed tightly against the end face of the inner hole of the component to be disassembled. Rotate the rotating rod 4 to adjust the position of the two pull screws 3, so that the lower end face of the first hook part 31 of the pull screw 3 presses against the fastener located outside the component to be disassembled. Then rotate the main rod 2 to drive the scissor pull claws 9 and the component to be disassembled held by the main rod 2 to rise, thereby removing the bearing from the bearing housing.

[0029] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this invention.

Claims

1. A small puller, comprising a base (1), wherein a threaded hole penetrating through the middle of the base (1) is provided, a main rod (2) is screwed into the threaded hole, and guide holes (11) penetrating through the middle are provided on both sides of the threaded hole, each guide hole (11) is provided with a puller screw (3), and the bottom of the puller screw (3) is provided with a first hook (31), characterized in that: The base (1) is also provided with two adjustment holes (12). Each of the two adjustment holes (12) is provided with a rotating rod (4) whose length direction is perpendicular to the puller screw (3). One end of the rotating rod (4) is movably connected to the base (1), and the other end passes through the side wall of the base (1) and extends outward from the base (1). The rotating rod (4) is provided with a movable seat (5). The movable seat (5) includes a rotating connecting part (51) and a screw connecting part (52). The rotating connecting part (51) is sleeved on the outside of the rotating rod (4) and threadedly connected to the rotating rod (4). The screw connecting part (52) is sleeved on the outside of the puller screw (3) and threadedly connected to the puller screw (3).

2. The miniature puller according to claim 1, characterized in that: The main rod (2) is provided with a bearing (6) at its lower end. A rotating seat (7) is provided on the outside of the bearing (6). A claw seat (8) is detachably connected to the outside of the rotating seat (7). A rotating shaft (83) is provided at the lower part of the claw seat (8). Two scissor claws (9) are rotatably connected to the center of the rotating shaft (83). A second hook (91) is provided at the lower part of the two scissor claws (9). The second hook (91) is located on the side close to the pull screw (3).

3. The miniature puller according to claim 2, characterized in that: The upper part of the scissor claw (9) is an adjustment part (92), and an adjustment bolt (93) is threadedly connected to the adjustment part (92) of one of the scissor claws (9). One end of the adjustment bolt (93) is in contact with the adjustment part (92) of the other scissor claw (9).

4. The miniature puller according to claim 1 or 3, characterized in that: The bottom end face of the first hook (31) is a horizontal plane.

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