Puller for disassembling belt pulley

Abstract

The puller comprises a supporting ring, at least three puller screws are arranged in the circumferential direction of the supporting ring, the front ends of the puller screws are arranged towards the center of the supporting ring, at least two pulling claws with the adjustable length are hinged to the upper end face of the supporting ring, and the puller screws are arranged on the supporting ring. The upper ends of all the pull claws are jointly hinged to a nut, and the center of the nut is in threaded connection with a threaded rod. The puller solves the problems that in the prior art, the grabbing range between claws is small, the claws are prone to disengagement, and the stroke of a screw is limited.

Description

Technical Field

[0001] This utility model relates to the field of disassembly tools, specifically to a puller for disassembling pulleys. Background Technology

[0002] A puller is a tool used to disassemble and install mechanical parts such as bearings, gears, and pulleys. The main types include two-jaw pullers, three-jaw pullers, and hydraulic pullers. Existing pullers have the following shortcomings in use:

[0003] 1. The adjustable range of the gripping size between the puller's claws is relatively small. For products with various specifications and detachment, pullers of different specifications need to be configured.

[0004] 2. For pulleys used with irregularly shaped belts such as V-belts and curved belts, due to the special structure of these belts, the pulleys of existing pullers are not easy to grip, and accidents of pulley slippage frequently occur.

[0005] 3. Some pulleys or gears are quite thick, and the length of the pull claws limits the stroke of the screw, making it impossible to meet the disassembly requirements;

[0006] 4. Some pulleys are installed too close to the machine body, making it impossible for the pulleys to engage. Utility Model Content

[0007] To address the aforementioned problems, this utility model discloses a puller for disassembling pulleys, which solves the problems of small gripping range between claws, easy claw release, and limited screw stroke in the prior art.

[0008] A puller for disassembling a pulley includes a support ring with at least three tightening screws circumferentially arranged on the support ring. The front ends of the tightening screws are positioned toward the center of the support ring. At least two adjustable-length pull claws are hinged to the upper end of the support ring. A nut is hinged to the upper end of all the pull claws, and a screw is threaded to the center of the nut.

[0009] Preferably, the pull claw includes an upper hinged threaded sleeve, a double-ended stud, and a lower hinged threaded sleeve connected in sequence.

[0010] Preferably, the upper hinged threaded sleeve is hinged to the side wall of the nut, and the lower hinged threaded sleeve is hinged to the upper end face of the support ring.

[0011] Preferably, both the upper and lower hinged threaded sleeves are provided with threaded holes, and the threads of the two threaded holes are in opposite directions.

[0012] Preferably, a scale is provided between the upper hinged threaded sleeve and the lower hinged threaded sleeve, and the scale is arranged parallel to the double-ended stud.

[0013] Preferably, the double-ended stud has an operating part at the middle position, and the threaded portions on both sides of the operating part have opposite directions of rotation.

[0014] Preferably, the tightening screw is threaded to the support ring along the radial direction of the support ring.

[0015] Preferably, the support ring includes an upper ring body and a lower ring body, and a connecting rod is provided between the two ring bodies. The tightening screw is threadedly connected to the connecting rod and passes through the connecting rod.

[0016] Beneficial effects

[0017] 1. This utility model sets up a support ring and a tightening screw on the support ring. The tightening screw clamps the pulley from the side inward. The clamping range is the length range of the tightening screw, which effectively expands the clamping stroke.

[0018] 2. This utility model uses a method of clamping from the side of the pulley in a concentric manner to replace the original method of hooking at the end face, which solves the problem of the pulley being too close to the machine body and not being able to be hooked, making it convenient for clamping and operation.

[0019] 3. The pull claw is designed with a double-ended stud and a hinged threaded sleeve, and its length is adjustable, which solves the technical problem of limited screw length due to excessive stroke of thick pulleys. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This utility model has a three-dimensional overall structure. Figure 1 ;

[0022] Figure 2 This utility model has a three-dimensional overall structure. Figure 2 ;

[0023] Figure 3 This is a front view of the overall structure of this utility model;

[0024] Figure 4 yes Figure 3 View A in the middle;

[0025] In the diagram, 1 is the screw, 2 is the nut, 3 is the upper hinged threaded sleeve, 4 is the double-ended stud, 5 is the upper ring body, 6 is the connecting rod, 7 is the tightening screw, 8 is the lower ring body, 9 is the pulley, and 10 is the lower hinged threaded sleeve. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] like Figure 1-4 As shown, this utility model discloses a puller for disassembling pulleys. The puller includes a lower support ring, a screw 1 passing through the upper and lower parts, and three adjustable claws that connect the support ring and the outer nut 2 of the screw 1.

[0028] The support ring includes an upper ring body 5 and a lower ring body 8 arranged coaxially. A connecting rod 6 is provided between the two ring bodies. There are three connecting rods 6, which are evenly distributed around the circumference of the ring body. The side of the connecting rod 6 is machined with a through threaded hole. The tightening screw 7 is connected to the threaded hole and passes through the connecting rod 6. After the three tightening screws 7 pass through the threaded hole, the front end of the tightening screw 7 faces the center of the support ring and is inserted into the groove of the pulley 9 to clamp the pulley together.

[0029] The pull claw comprises an upper hinged threaded sleeve 3, a double-ended stud 4, and a lower hinged threaded sleeve 10 connected in sequence. The lower hinged threaded sleeve 10 is hinged to the upper end face of the upper ring body 5, and the upper hinged threaded sleeve 3 is hinged to the side wall of the nut 2. Both the lower end of the upper hinged threaded sleeve 3 and the upper end of the lower hinged threaded sleeve 10 are provided with threaded holes, with the threads of the two holes rotating in opposite directions. An operating part is located in the middle of the double-ended stud 4, and the threaded portions on both sides of the operating part also rotate in opposite directions. Tightening the double-ended stud 4 allows the two hinged threaded sleeves to move closer or further apart, thus adjusting the overall distance. To further ensure that the lengths of the three pull claws are consistent after the double-ended stud 4 moves, a retractable scale is provided between the upper hinged threaded sleeve 3 and the lower hinged threaded sleeve 10. This scale is parallel to the axis of the double-ended stud 4; that is, when the upper hinged threaded sleeve 3 and the lower hinged threaded sleeve 10 move closer or further apart, the scale retracts or extends, displaying the distance between the two hinged threaded sleeves in real time.

[0030] Nut 2 consists of two coaxially fitted rings. The inner ring has a threaded hole, and the outer ring has three hinge seats on its side, each hinged to the corresponding upper hinged sleeve 3. The two rings are connected as a whole by a rib plate. Screw 1 passes through both ends of nut 2, and an operating handle is provided at the upper end of screw 1 for easy hand operation with low force. A clamping part is provided at the upper end of the operating handle for easy wrench gripping.

[0031] The upper hinge sleeve 3 and the upper hinge seat, and the lower hinge sleeve 10 and the lower hinge seat are both hinged by pins.

[0032] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A puller for disassembling a pulley, characterized in that, Includes a support ring, on which at least three tightening screws (7) are arranged circumferentially, with the front end of the tightening screws facing the center of the support ring. At least two adjustable pull claws are hinged to the upper end of the support ring, and a nut (2) is hinged to the upper end of all the pull claws. A screw (1) is threaded to the center of the nut.

2. The puller for disassembling a pulley according to claim 1, characterized in that, The pull claw includes an upper hinged threaded sleeve (3), a double-ended stud (4), and a lower hinged threaded sleeve (10) connected in sequence.

3. The puller for disassembling a pulley according to claim 2, characterized in that, The upper hinged sleeve (3) is hinged to the side wall of the nut (2), and the lower hinged sleeve (10) is hinged to the upper end face of the support ring.

4. The puller for disassembling a pulley according to claim 2, characterized in that, Both the upper hinged screw sleeve (3) and the lower hinged screw sleeve (10) are provided with threaded holes, and the threads of the two threaded holes are opposite in direction.

5. The puller for disassembling a pulley according to claim 2, characterized in that, A scale is provided between the upper hinged screw sleeve (3) and the lower hinged screw sleeve (10), and the scale is set parallel to the double-ended stud.

6. The puller for disassembling a pulley according to claim 2, characterized in that, The double-ended stud (4) has an operating part in the middle position, and the threaded parts on both sides of the operating part have opposite directions of rotation.

7. The puller for disassembling a pulley according to claim 1, characterized in that, The tightening screw (7) is threaded to the support ring along the radial direction of the support ring.

8. The puller for disassembling a pulley according to claim 1, characterized in that, The support ring includes an upper ring body (5) and a lower ring body (8), and a connecting rod (6) is provided between the two ring bodies. The tightening screw is threadedly connected to the connecting rod and passes through the connecting rod.

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