A new two-jaw puller

Abstract

The utility model discloses a novel two -jaw puller belongs to bearing maintenance field, the utility model discloses two -jaw puller including connecting table, screw rod, puller, screw rod with connecting table thread cooperation, puller includes two and is located connecting table both sides, every puller top end bolt fixedly has hinged link, hinged link top end with connecting table passes through rotating shaft rotation connection, puller is extended with the connecting portion upwards at the connecting hinged link, the both sides of connecting table are provided with the through -slot of can accommodate connecting portion, the through -slot still is provided with the sliding block of can with horizontal direction positioning sliding, still fixed with angle board on the sliding block, the angle board is provided with the sliding slot of with puller swing direction consistent on, the connecting portion projects and is connected with sliding slot sliding through the boss column, has the advantages such as high adjustment efficiency, low error.

Description

Technical Field

[0001] This utility model belongs to the technical field of bearing repair equipment, specifically, it relates to a novel two-jaw puller. Background Technology

[0002] The puller is a commonly used hydraulic disassembly tool in the field of mechanical repair. It is mainly used for the non-destructive disassembly of components such as bearings and gears, and can be divided into two main types: manual and hydraulic.

[0003] The existing puller structure mainly consists of a handle, a screw rod, and pull claws. The main models are two-claw and three-claw, with key dimensions including pull claw length, pull claw spacing, and screw rod length, to accommodate bearings of different diameters and axial installation depths. In use, the screw rod tip is positioned in the shaft end center hole, and the pull claw position is adjusted so that the pull claws hook onto the bearing's outer ring. Rotating the handle causes the pull claws to move the bearing axially outward for removal.

[0004] For example, Chinese utility model patent CN207465129U discloses a small bearing puller, which includes a threaded beam, a lead screw, a nut one, a nut two, a pull claw one, and a pull claw two. The lead screw is arranged perpendicularly to the threaded beam and is threadedly connected to the threaded beam. The upper end of the lead screw is provided with a nut, and the lower end of the lead screw has a conical structure. Nut one and nut two are respectively provided on the threaded beams on both sides of the lead screw. Pull claw one and pull claw two are respectively fixed on nut one and nut two. Pull claw one and pull claw two are both L-shaped.

[0005] The aforementioned puller structure uses two vertical, opposing pull claws to abut against the bottom of the bearing, and then the bearing is disengaged by rotating the lead screw. Although the distance between the two pull claws can be adjusted by the threaded crossbeam, this adjustment method is limited to the horizontal distance and cannot achieve changes in axial depth, thus limiting the range of applicable bearing models.

[0006] To address these issues, we propose a novel two-claw puller. Utility Model Content

[0007] In view of the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a new type of two-claw puller.

[0008] To solve the above problems, the technical solution adopted by this utility model is as follows: A novel two-jaw puller includes a connecting platform, a spiral rod, and pull claws. The spiral rod is threadedly engaged with the connecting platform. The pull claws include two claws located on both sides of the connecting platform. A hinge rod is bolted to the top of each pull claw. The top of the hinge rod is rotatably connected to the connecting platform via a rotating shaft. The pull claw has a connecting portion extending upward at the connection of the hinge rod. Through grooves that can accommodate the connecting portions are provided on both sides of the connecting platform. The through grooves are also provided with sliders that can be positioned and slid in a horizontal direction. An angle plate is fixed on the slider. A sliding groove is provided on the angle plate that is consistent with the swing direction of the pull claw. The connecting portion has a protruding post that is slidably connected to the sliding groove through the protruding post.

[0009] Furthermore, an adjusting screw and a limiting rod are provided in the through groove. The two ends of the adjusting screw are rotatably connected to the inner wall of the through groove and a rotating platform is fixed at one end. The two ends of the limiting rod are fixedly connected to the inner wall of the through groove. One end of the slider is threadedly engaged with the adjusting screw, and the other end is slidably connected with the limiting rod.

[0010] Furthermore, the groove is an arc groove.

[0011] Furthermore, the through groove is vertically continuous, and the connecting part can pass through the through groove.

[0012] Furthermore, the pull claw and the hinge rod are fixed together by a hexagonal bolt and a nut, and a washer is also placed at the interval between the pull claw and the hinge rod.

[0013] Furthermore, the pull claw is an arc-shaped plate of uniform thickness, and its width gradually narrows from top to bottom, with a truncated corner protruding from the bottom end of the pull claw.

[0014] Furthermore, the two pull claws are symmetrical about the vertical axis of the helical rod, and a handle is fixed to the top of the helical rod.

[0015] Furthermore, the bottom end of the helical rod is formed with a pointed tip.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention utilizes a laterally displaced slider within the connecting platform to drive the hinge rod to swing, thereby changing the spacing and depth of the claws at the bottom of the hinge rod. Since the swing trajectory of the hinge rod is arc-shaped, an angle plate matching the trajectory is installed within the through groove. During the lateral movement of the slider, the connecting part at the top of the claw can slide within the groove via a protrusion. Because the groove itself aligns with the swing trajectory of the claw, the lateral movement of the slider is ultimately transformed into an arc-shaped adjustment movement of the claw. The entire claw adjustment process relies on threaded adjustment, resulting in a linear adjustment process with smaller adjustment errors and higher adjustment efficiency. Attached Figure Description

[0017] Figure 1 This is a front view of the two-claw puller in this utility model; Figure 2 This is a right view of the two-claw puller in this utility model; Figure 3 This is a cross-sectional view of the internal structure of one of the claws of the two-claw puller under the maximum adjustment range of the present invention; Figure 4 This utility model is different from Figure 3 A schematic diagram showing the comparison of adjustment ranges.

[0018] In the diagram: 1. Connecting platform; 2. Helical rod; 3. Pull claw; 4. Hinge rod; 5. Rotating shaft; 6. Bushing; 7. Connecting part; 8. Through groove; 9. Slider; 10. Angle plate; 11. Slide groove; 12. Protruding post; 13. Adjusting screw; 14. Limiting rod; 15. Rotating table; 16. Hex bolt; 17. Nut; 18. Washer; 19. Handle. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments.

[0020] Example 1 like Figure 1 and Figure 2 As shown, in this embodiment, a novel two-claw puller includes a connecting platform 1, a spiral rod 2, and pull claws 3. The spiral rod 2 is threadedly engaged with the connecting platform 1. There are two pull claws 3 located on both sides of the connecting platform 1. A hinge rod 4 is bolted to the top of each pull claw 3. The top of the hinge rod 4 is rotatably connected to the connecting platform 1 via a rotating shaft 5. The two pull claws 3 are symmetrical about the vertical axis of the spiral rod 2. A handle 19 is also fixed to the top of the spiral rod 2. The bottom of the spiral rod 2 has a pointed tip.

[0021] With the above structure, the two claws 3 are hinged to both sides of the connecting platform 1. The height and the distance between the claws are changed by the hinge. This connection method is common in puller structures. The conventional connection method is to manually swing the hinge rod 4 and the claws 3 and then fix the two ends of the hinge rod 4 directly with bolts to fix the angle of the claws 3. However, the angle changes during the connection process between the hinge rod 4 and the claws 3, which indirectly realizes the adjustment of the axial depth.

[0022] Obviously, the traditional depth adjustment method is achieved by repeatedly disassembling and assembling the bolts at the connection point, which results in high repetition and the adjustment angle of the pull claw 3 is greatly affected by human intervention, with significant angular errors between the two pull claws 3. This is not conducive to subsequent bearing disassembly. Therefore, if... Figure 3 and Figure 4As shown, in this invention, the pull claw 3 extends upward at the connecting hinge rod 4, with a connecting portion 7. The connecting platform 1 has through slots 8 on both sides to accommodate the connecting portion 7. The through slots 8 also have sliders 9 that can slide horizontally. An angle plate 10 is fixed to the slider 9, and the angle plate 10 has a sliding groove 11 aligned with the swing direction of the pull claw 3. The connecting portion 7 has a protruding post 12, which slides slidably with the sliding groove 11. The sliding groove 11 is an arc-shaped groove. The through slot 8 is vertically continuous, allowing the connecting portion 7 to pass through it. The pull claw 3 is an arc-shaped plate of uniform thickness, with its width gradually narrowing from top to bottom. A corner platform protrudes from the bottom end of the pull claw 3.

[0023] Unlike traditional two-point positioning, the hinge rod 4 and the pull claw 3 in this utility model are still fixed by hexagonal bolts 16 and nuts 17. A shim 18 is also placed between the pull claw 3 and the hinge rod 4 to compensate for the thickness requirement. However, the hinge rod 4 and the connecting rod are rotatably connected by a rotating shaft 5, and a bushing 6 is then fitted to limit the rotation of the rotating shaft 5.

[0024] The pull claw 3 itself is an arc-shaped plate of uniform thickness, and its width gradually narrows from top to bottom. The bottom end of the pull claw 3 has a protruding corner platform. The reason for directly bolting the pull claw 3 to the hinge rod 4 is to take into account the angle of the corner platform formed by the bottom end of the pull claw 3. In actual operation, the tilt angle of the corner platform should not be too high or too low in order to maintain stable contact with the bottom surface of the bearing. Then, the hinge rod 4 is oscillating relative to the connecting platform 1 through the rotating shaft 5 (i.e., to achieve depth change).

[0025] Since the swing trajectory of the hinge rod 4 is an arc-shaped trajectory, this utility model sets a slider 9 that can be laterally positioned and slid in the through groove 8, together with an angle plate 10. During the lateral movement of the slider 9, the connecting part 7 at the top of the pull claw 3 can slide in the slide groove 11 through the protrusion 12. Since the slide groove 11 itself is consistent with the swing trajectory of the pull claw 3, the lateral movement of the slider 9 can be transformed into the arc-shaped adjustment movement of the pull claw 3.

[0026] The actual structure for the displacement of slider 9 can be varied. In this embodiment, an adjusting screw 13 and a limiting rod 14 are provided in the through groove 8. The two ends of the adjusting screw 13 are rotatably connected to the inner wall of the through groove 8 and a rotating table 15 is fixed at one end. The two ends of the limiting rod 14 are fixedly connected to the inner wall of the through groove 8. One end of the slider 9 is threadedly engaged with the adjusting screw 13, and the other end is slidably connected with the limiting rod 14.

[0027] Under the axial limitation of the limiting rod 14, the slider 9 is subjected to the action of the adjusting screw 13 that is threadedly engaged with it, which can convert the rotation of the adjusting screw 13 into a horizontal displacement. The threaded adjustment method can ensure the linear change of the subsequent adjustment process of the pull claw 3. Compared with the manual disassembly and fixing method, the error is lower and the adjustment method is more convenient.

[0028] When disassembling the bearing, the external bearing is fixed by means of a tiger stand, and then the distance and axial depth between the two pull claws 3 are adjusted by rotating the rotary table 15 to match the bearing model, so that the two pull claws 3 abut against the bottom of the bearing respectively, and at the same time the bottom tip of the screw rod 2 abuts against the axis of the bearing rotor. The screw rod 2 is continuously tightened, and the connecting table 1 will drive the bearing to fall off under the reaction of the thread, thus realizing disassembly.

[0029] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A novel two-jaw puller, comprising a connecting platform, a helical rod, and pull claws, wherein the helical rod is threadedly engaged with the connecting platform, and the pull claws comprise two claws located on both sides of the connecting platform, characterized in that: Each of the pull claws has a hinge rod bolted to its top. The top of the hinge rod is rotatably connected to the connecting platform via a pivot. The pull claw extends upward at the connection point of the hinge rod. The connecting platform has through slots on both sides that can accommodate the connecting parts. The through slots are also provided with sliders that can be positioned and slid in a horizontal direction. An angle plate is fixed on the slider. The angle plate has a groove that is consistent with the swing direction of the pull claw. The connecting part has a protruding post that is slidably connected to the groove through the protruding post.

2. The novel two-claw puller according to claim 1, characterized in that, An adjusting screw and a limiting rod are provided in the through groove. The two ends of the adjusting screw are rotatably connected to the inner wall of the through groove and a rotating platform is fixed at one end. The two ends of the limiting rod are fixedly connected to the inner wall of the through groove. One end of the slider is threadedly engaged with the adjusting screw, and the other end is slidably connected to the limiting rod.

3. A novel two-claw puller according to claim 2, characterized in that, The groove is an arc groove.

4. A novel two-claw puller according to claim 2, characterized in that, The through groove is open from top to bottom, and the connecting part can pass through the through groove.

5. A novel two-claw puller according to claim 1, characterized in that, The pull claw and the hinge rod are fixed together by hexagonal bolts and nuts, and a washer is also placed at the interval between the pull claw and the hinge rod.

6. A novel two-claw puller according to claim 1, characterized in that, The pull claw is an arc-shaped plate with a uniform thickness, and its width gradually narrows from top to bottom. The bottom end of the pull claw has an inner protrusion of a corner platform.

7. A novel two-claw puller according to claim 1, characterized in that, The two pull claws are symmetrical about the vertical axis of the spiral rod, and a handle is fixed to the top of the spiral rod.

8. A novel two-claw puller according to claim 7, characterized in that, The bottom end of the helical rod has a pointed tip.

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