Chain type disc pulling device

Abstract

The utility model discloses a chain type disc pulling device, which belongs to the technical field of equipment maintenance appliances and particularly comprises a sleeve head, a jacking component and a chain type claw, the sleeve head comprises a threaded sleeve, a threaded hole is formed in the middle of the threaded sleeve, and a plurality of connecting parts are distributed outside the threaded sleeve; the jacking assembly vertically penetrates through the sleeve head through the threaded hole, and a threaded assembly structure is formed between the jacking assembly and the sleeve head. An operation part is arranged at the top end of the jacking assembly; a plurality of chain type hook claws are arranged, each chain type hook claw is composed of a chain, a metal hook claw and a quick release pin, and each chain type hook claw is connected with the sleeve head through the corresponding quick release pin. The drawing device is simple in structure and convenient to use, the chain is adopted as a drawing mechanism, compared with a rigid mechanical arm clamping jaw of a traditional drawing device, opening and closing are more flexible and free, the drawing device is not limited to a fixed opening and closing moving track, the holding action of a bearing can be completed in a narrow space, drawing and dismounting of the bearing can be completed, and the drawing device can adapt to different working environments.

Description

Technical Field

[0001] The utility model belongs to the technical field of equipment maintenance tools, and in particular relates to a chain-type disc puller. Background Art

[0002] A puller is a tool that assists mechanics in removing bearings. It is an essential tool for mechanics in production workshops of enterprises. Currently, there are two main types of pullers on the market. One type requires external support and is supported by an internal gripper mechanism that holds the target. The bearing is removed by screwing a screw or lifting with a hydraulic cylinder. The other type has an external gripper mechanism with a retractable and movable push rod in the middle. The bearing is removed by rotating the push rod to lift the gripper mechanism. However, these two types of pullers have a common feature, that is, the gripper mechanism of the puller is composed of rigid mechanical arms that are articulated together. The opening and closing actions between multiple jaws have fixed moving trajectories. The extension action cannot be completed in a narrow space, and it is not suitable for use in a small space.

[0003] For this reason, we design a chain puller that is simple in structure, easy to operate, easy to carry and can be used in narrow spaces. Utility Model Content

[0004] The purpose of the utility model is to provide a chain puller to solve the above problems existing in the prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A chain type disc puller comprises a sleeve head, a lifting assembly and a chain type hook claw.

[0007] Furthermore, the sleeve includes a threaded sleeve, a threaded hole penetrating the upper and lower ends of the threaded sleeve is provided in the middle of the threaded sleeve, and a plurality of connecting parts are distributed at equal distances around the circumference of the threaded sleeve.

[0008] Furthermore, the jacking component vertically penetrates the sleeve through a threaded hole and forms a threaded assembly structure with the sleeve; and an operating portion is provided at the top end of the jacking component.

[0009] Furthermore, there are several groups of chain hooks, and the chain hooks are composed of chains, metal hooks and quick-release pins, and each group of chain hooks is connected to the sleeve through the quick-release pins.

[0010] Furthermore, the connecting portion is provided with a pin hole for plugging with a quick-release pin, and the connecting portion and the sleeve are fixed by welding.

[0011] Furthermore, auxiliary handles are welded to the outer side of the sleeve at equal distances around the circumference, and the auxiliary handles are designed to be horizontal.

[0012] Furthermore, a support head is inserted into the bottom of the sleeve, the part of the support head located outside the sleeve is conical in design, an avoidance hole is provided at the position of the threaded hole in the middle of the support head, and the support head is made of plastic as a whole.

[0013] Furthermore, the metal hook is fixed to one end of the chain, and the other end of the chain is detachably connected to the connecting portion on the outside of the sleeve through a quick-release pin.

[0014] Furthermore, the lifting assembly includes a main screw and a secondary screw, the main screw is threadedly assembled with the threaded hole, the bottom of the main screw is provided with a socket, and the top of the secondary screw is integrally formed with a column head adapted to the socket.

[0015] Furthermore, a detachable bottom supporting nut is threadedly assembled on the auxiliary screw.

[0016] Furthermore, the operating portion includes a screw nut welded to the top end of the main screw, a screw cap is welded to the top of the screw nut, and a through hole is transversely opened on the screw nut.

[0017] Beneficial effects:

[0018] The utility model has a simple structure and is easy to use. It uses a chain as a pulling mechanism. Compared with the rigid mechanical arm clamp of the traditional puller, the opening and closing is more flexible and free. It is not limited to a fixed opening and closing movement trajectory. It can complete the bearing grasping action in a narrow space and complete the pulling and disassembly of the bearing, and can adapt to different working environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a chain-type puller of the utility model;

[0020] Figure 2 This is a schematic cross-sectional view of a chain puller according to the present invention;

[0021] Figure 3 The utility model is a schematic diagram of the structure of a lifting component of a chain puller.

[0022] In the figure: 1. sleeve; 101. threaded sleeve; 102. threaded hole; 103. auxiliary handle; 104. connecting part; 105. support head; 2. lifting assembly; 201. main screw; 202. auxiliary screw; 203. socket; 204. bottom nut; 205. column head; 3. chain claw; 301. chain; 302. quick-release pin; 303. metal claw; 4. operating part; 401. screw nut; 402. screw cap; 403. through hole. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly introduced below in conjunction with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structures of the drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0024] Example

[0025] Due to the limitations of the structural design of the currently known disk pullers, the opening and closing of the handle mechanism of the disk puller during use are all based on a fixed moving trajectory, which has certain requirements for the space of the working environment and cannot be used in narrow spaces. Therefore, to solve this problem, we propose a chain disk puller with a simple structure, easy operation, easy to carry, and able to be used in narrow spaces. The specific solution is as follows:

[0026] like Figure 1-2 As shown, this embodiment provides a chain puller, including a sleeve 1, a lifting assembly 2 and a chain claw 3; wherein the sleeve 1 includes a threaded sleeve 101, a threaded hole 102 is provided in the middle of the threaded sleeve 101 and passes through the upper and lower ends of the threaded sleeve 101, and a plurality of connecting parts 104 are distributed equidistantly around the circumference of the outer portion of the threaded sleeve 101; the connecting parts 104 are fixed to the sleeve 1 by welding, and the lifting assembly 2 vertically passes through the sleeve 1 through the threaded hole 102 and forms a threaded assembly structure with the sleeve 1; at the same time, an operating part 4 is provided at the top of the lifting assembly 2, and the staff can rotate the lifting assembly 2 by using a tool (for example, a wrench) in cooperation with the operating part 4 to make the lifting assembly 2 move up and down in the sleeve 1.

[0027] During the use of the disc puller, in order to make the opening and closing action of the gripping mechanism get rid of the fixed moving trajectory, make its opening and closing action more flexible and free, and enable it to complete the gripping action of the bearing in a narrow environment, its chain hooks 3 have several groups, each group of chain hooks 3 is composed of a chain 301, a metal hook 303 and a quick-release pin 302, the metal hook 303 is fixed to one end of the chain 301, and each group of chain hooks 3 is connected to the connecting part 104 on the outside of the sleeve 1 through the quick-release pin 302.

[0028] In order to achieve a detachable assembly effect between the chain hook 3 and the thimble 1, a pin hole is provided on the connecting portion 104 thereof for plugging with the quick-release pin 302, and the other end of the chain 301 is detachably connected to the connecting portion 104 on the outside of the thimble 1 through the quick-release pin 302.

[0029] Since the device needs to be pre-adjusted before use, the adjustment method is to screw the jacking assembly 2 after the chain hook 3 grabs the bearing, so that the chain 301 in the chain hook 3 is tightened, which provides convenience for subsequent force application. In this process, it is necessary to manually hold and position the sleeve 1 to facilitate the initial tightening operation of the chain 301. In order to facilitate the operator to hold the sleeve 1 and apply force, auxiliary handles 103 are welded at equal distances around the circumference of the outer side of the sleeve 1. The auxiliary handles 103 are designed to be horizontal, and the number of auxiliary handles 103 is between 2 and 3.

[0030] A support head 105 is inserted into the bottom of the sleeve 1. The part of the support head 105 located outside the sleeve 1 is conical in design. An avoidance hole is provided in the middle of the support head 105 at the position corresponding to the threaded hole 102, and the support head 105 is made of plastic as a whole. The design of the support head 105 is mainly to provide convenience for the user to hold the sleeve 1 during operation, and at the same time provide a support for the upper part of the chain hook 3 for easy grip.

[0031] like Figure 3 As shown, the jacking assembly 2 includes a main screw 201 and a secondary screw 202. The main screw 201 is threadedly assembled with the threaded hole 102. The bottom of the main screw 201 is provided with a socket 203, and the top of the secondary screw 202 is integrally formed with a column head 205 that is adapted to the socket 203. The main screw 201 and the secondary screw 202 are designed to be detachable and plug-in, and the secondary screw 202 is an optional accessory. Different lengths and sizes can be selected according to actual usage conditions and needs, so as to achieve the purpose of extending the length of the jacking assembly 2 and expanding the scope of application of the jacking assembly 2.

[0032] A detachable bottom support nut 204 is threadedly assembled on the auxiliary screw 202. The design of the bottom support nut 204 is mainly to address the problem that the jacking component 2 cannot effectively exert force when removing the bearing on the hollow shaft. Moreover, the bottom support nut 204 can be freely adjusted on the auxiliary screw 202. When in use, its position can be freely adjusted according to the actual situation, making the entire device more convenient and practical during use.

[0033] In order to facilitate the user to operate the device, the operating part 4 includes a screw nut 401 welded to the top of the main screw 201, so that the staff can operate the device with a wrench. A screw cap 402 is welded on the top of the screw nut 401. The design of the screw nut is mainly used for pre-adjusting the position of the jacking component 2 in the early stage, so that the staff can manually screw the jacking component 2. A through hole 403 is horizontally opened on the screw nut 401. The design of the through hole 403 is to facilitate the staff to operate the device with a screwdriver under special circumstances.

[0034] During the use of the entire chain puller, it is necessary to first adjust the position of the jacking component 2 according to the usage scenario to minimize the time of the early tightening operation of the chain 301. When the jacking component 2 is adjusted to the corresponding position, the end of the jacking component 2 of the puller is pressed against the end of the rotating shaft of the maintenance workpiece, and the chain claws 3 are respectively unfolded to grasp the bearing, and then the jacking component 2 is screwed, and the chain claws 3 are tightened to make the chain 301 taut. Finally, the jacking component 2 is screwed by the tool to make the chain claws 3 generate greater pulling force to pull the bearing off the rotating shaft.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A chain puller, characterized in that: It comprises a sleeve (1), a lifting assembly (2) and a chain hook (3); The sleeve (1) comprises a threaded sleeve (101), a threaded hole (102) penetrating the upper and lower ends of the threaded sleeve (101) is provided in the middle of the threaded sleeve (101), and a plurality of connecting portions (104) are distributed on the outside of the threaded sleeve (101); The lifting component (2) vertically penetrates the sleeve (1) through the threaded hole (102) and forms a threaded assembly structure with the sleeve (1); an operating portion (4) is provided at the top end of the lifting component (2); There are several groups of chain hooks (3), and the chain hooks (3) are composed of a chain (301), a metal hook (303) and a quick-release pin (302), and each group of chain hooks (3) is connected to the sleeve (1) through the quick-release pin (302).

2. A chain puller according to claim 1, characterized in that: The connecting portion (104) is provided with a pin hole for plugging and cooperating with the quick-release pin (302), and the connecting portion (104) and the sleeve (1) are fixed by welding.

3. A chain puller according to claim 1, characterized in that: Auxiliary handles (103) are welded to the outer side of the sleeve (1) at equal distances around the circumference, and the auxiliary handles (103) are designed to be horizontal.

4. A chain puller according to claim 3, characterized in that: A support head (105) is inserted into the bottom of the sleeve (1), and the portion of the support head (105) located outside the sleeve (1) is of a conical design. A relief hole is provided in the middle of the support head (105) at a position corresponding to the threaded hole (102), and the support head (105) is entirely made of plastic.

5. A chain puller according to claim 1, characterized in that: The metal hook (303) is fixed to one end of the chain (301), and the other end of the chain (301) is detachably connected to the connecting portion (104) on the outside of the sleeve (1) via a quick-release pin (302).

6. A chain puller according to claim 1, characterized in that: The lifting assembly (2) comprises a main screw (201) and a secondary screw (202), wherein the main screw (201) is threadedly assembled with the threaded hole (102), a socket (203) is provided at the bottom of the main screw (201), and a column head (205) adapted to the socket (203) is integrally formed at the top of the secondary screw (202).

7. A chain puller according to claim 6, characterized in that: The auxiliary screw (202) is threadedly assembled with a detachable bottom supporting nut (204).

8. A chain puller according to claim 6, characterized in that: The operating portion (4) comprises a screw nut (401) welded to the top of the main screw (201), a screw cap (402) is welded to the top of the screw nut (401), and a through hole (403) is transversely opened on the screw nut (401).

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