Shaft key dismounting tool
By designing a dedicated key disassembly fixture, the problem of the lack of key disassembly tools in the existing technology has been solved, enabling efficient and safe disassembly of key shafts, reducing maintenance costs and improving user experience.
Patent Information
- Application Number
- CN202520498928.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-20
AI Technical Summary
The lack of dedicated tools for disassembling shaft keys in the current technology leads to operators using inappropriate disassembly methods, increasing the risk of shaft key damage and equipment failure.
A key removal tooling was designed, including a puller and a handle, which enables smooth and efficient removal of the key through threaded and secure connections.
It significantly improves the efficiency and safety of key disassembly, simplifies the maintenance process, reduces maintenance costs, and enhances the user experience.
Smart Images
Figure CN223947816U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of shaft key dismounting tool. BACKGROUND
[0002] The shaft key of motor is the key part connecting the rotating shaft of motor and coupling, pulley, gear and other transmission components, and plays a crucial role in mechanical equipment. However, in the actual use process, the damage problem of shaft key is common, which seriously affects the normal operation of equipment and brings additional maintenance cost and downtime. After in-depth investigation and analysis, we found that the main reason for frequent damage of shaft key is that the operator lacks a dedicated dismounting tool. In the absence of appropriate tools, operators often use inappropriate dismounting methods, such as using hammer, chisel and other tools to knock forcibly, or using mismatched pulling tools to dismount. This is very easy to cause deformation, fracture and other damage of shaft key, and may also cause damage to the rotating shaft of motor, further aggravating the risk of equipment failure.
[0003] The content of the background section is only the technology known to the inventor, and does not necessarily represent the prior art in the field. INVENTION CONTENTS
[0004] In view of one or more defects in the prior art, the utility model provides a kind of shaft key dismounting tool, comprising:
[0005] The puller comprises a first part, a second part and a third part arranged in sequence along a first direction, wherein the first part is provided with a threaded hole, the second part is defined with a containing space, and the third part is provided with an inlet, the threaded hole and the inlet are communicated with the containing space respectively, and the third part is configured to connect the shaft key; and
[0006] The handle is threaded in the threaded hole and is threadedly connected with the threaded hole.
[0007] According to one aspect of the utility model, the first part is annular structure, and the threaded hole is arranged in the middle part of the first part.
[0008] According to one aspect of the utility model, the second part is cylindrical structure; or,
[0009] The second part is a support structure comprising at least two support rods.
[0010] According to one aspect of the utility model, the third part is annular structure, and the third part has a through hole in the middle position, and the third part is configured to clamp the shaft key; or,
[0011] The third part is a fan-shaped structure, and an arc-shaped notch is arranged at the edge of the third part.
[0012] According to an aspect of the present application, the threaded hole and the inlet are aligned in the first direction.
[0013] According to an aspect of the present application, the first part, the second part and the third part are integrally configured; or,
[0014] One of the first part and the third part is integrally configured with the second part, and the other of the first part and the third part is detachably connected with the second part; or,
[0015] The first part is detachably connected with the second part, and the second part is detachably connected with the third part.
[0016] According to an aspect of the present application, the detachable connection is a screw connection.
[0017] According to an aspect of the present application, the handle comprises:
[0018] a holding portion; and
[0019] a threaded portion comprising a first end and a second end, and the first end of the threaded portion is connected with the holding portion.
[0020] According to an aspect of the present application, the handle further comprises a protective head connected at the second end of the threaded portion.
[0021] According to an aspect of the present application, the protective head is a rubber sleeve, a silica gel sleeve or a metal ball, wherein the metal ball is rotatably connected to an end face of the second end of the threaded portion.
[0022] Compared with the prior art, the utility model embodiment provides a shaft key dismounting tool, and the efficiency and safety of shaft key dismounting are remarkably improved through the unique puller and handle design. Specifically, in the dismounting process, the user only needs to pass the rotating shaft of the motor through the inlet of the third part of the puller, so that the shaft key is stably connected (such as clamped) with the third part, and then the rotating shaft of the motor is pushed through the rotation of the handle, so that the shaft key is stably and efficiently dismounted from the rotating shaft by the puller (third part). This design not only greatly simplifies the traditional cumbersome maintenance process, significantly shortens the maintenance time, but also remarkably improves the work efficiency. More importantly, the tool is easy and intuitive to operate, and the user can independently complete the maintenance task without relying on professional technical support, thereby effectively reducing the maintenance cost and remarkably improving the overall user experience of the equipment. BRIEF DESCRIPTION OF DRAWINGS
[0023] The accompanying drawings are included to provide a further understanding of the present application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and are used to explain the present application, and do not limit the present application. In the drawings:
[0024] Figure 1 A schematic diagram of a motor is shown;
[0025] Figure 2 A schematic diagram of a shaft key dismounting tool according to an embodiment of the present application is shown;
[0026] Figure 3 A sectional view of a shaft key dismounting tool according to an embodiment of the present application is shown;
[0027] Figure 4 A schematic diagram of a shaft key dismounting tool in use according to an embodiment of the present application is shown;
[0028] Figure 5 A schematic diagram of a shaft key dismounting tool according to another embodiment of the present application is shown;
[0029] Figure 6 A schematic diagram of a third part according to an embodiment of the present application is shown;
[0030] Figure 7 A schematic diagram of a third part according to yet another embodiment of the present application is shown.
[0031] In the drawings: 100, motor; 110, motor body; 120, rotating shaft; 130, shaft key; 200, shaft key dismounting tool; 210, puller; 211, first part; 212, second part; 2121, support rod; 213, third part; 214, threaded hole; 215, accommodating space; 216, inlet; 217, through hole; 218, arc-shaped gap; 220, handle; 221, gripping portion; 222, threaded portion. DETAILED DESCRIPTION
[0032] In the following, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.
[0033] In the description of the utility model, it is necessary to understand that the orientation or positional relation indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is the orientation or positional relation based on the orientation or positional relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.
[0034] In the description of the utility model, it should be explained that, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected: it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0035] In the utility model, unless otherwise specifically defined and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and inclined upward of the first feature to the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and inclined upward of the first feature to the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.
[0036] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. For the sake of simplicity, the description below of the specific examples will not be exhaustive of the application. Indeed, the application will be described with additional specificity and detail in order to meet statutory requirements. Moreover, the application will be presented in the context of specific examples which are intended to be illustrative rather than restrictive. It will be apparent to those skilled in the art that various modifications and variations can be made to the methods and materials described and illustrated herein without departing from the spirit and scope of the application. One skilled in the art will readily recognize that the application can be practiced with other methods and materials than those described and illustrated herein.
[0037] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are merely illustrative and are not intended to limit the present application. In addition, the present application provides various specific examples of processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.
[0038] Figure 1 A schematic diagram of an electric motor 100 is shown, as Figure 1 The electric motor 100 includes a motor body 110, a rotating shaft 120 and a shaft key 130. One end of the rotating shaft 120 is connected to the motor body 110, and the other end has a keyway on the side surface, which is in communication with the end surface of the other end. The shaft key 130 is arranged in the keyway and is in close fit (e.g. clearance fit or interference fit) with the keyway.
[0039] We found that there is a lack of tools specifically for disassembling the shaft key in the prior art, which leads to the fact that maintenance personnel often use inappropriate methods to disassemble the shaft key, such as using a hammer, chisel and other tools to knock forcibly, or using mismatched pulling tools to disassemble. This is very easy to cause deformation, breakage and other damage to the shaft key, and may also cause damage to the rotating shaft of the electric motor, further aggravating the risk of equipment failure.
[0040] Therefore, it has become the common appeal and urgent need of equipment manufacturers, maintenance service providers and end users to develop a tool that can smoothly and efficiently disassemble the shaft key to minimize the risk of damage to the shaft key during disassembly.
[0041] Figure 2 A schematic diagram of a shaft key disassembly tool 200 according to an embodiment of the present application is shown,
[0042] Figure 3 A cross-sectional view of the shaft key disassembly tool 200 according to an embodiment of the present application is shown, which will be described in detail below in conjunction with Figure 2 and Figure 3
[0043] As Figure 2 and Figure 3 As shown, the shaft key dismounting tool 200 comprises a puller 210 and a handle 220. The puller 210 comprises a first portion 211, a second portion 212 and a third portion 213 arranged in sequence along a first direction. A threaded hole 214 is arranged in the middle of the first portion 211 and penetrates the first portion 211 of the puller 210 in the first direction. The second portion 212 defines a receiving space 215. The receiving space 215 is in communication with the threaded hole 214, which allows a part of the handle 220 to enter the receiving space 215 through the threaded hole 214. Specifically, the handle 220 is arranged in the threaded hole 214 and is threadedly connected with the threaded hole 214. By rotating the handle 220, the handle 220 can be moved into or out of the receiving space 215 along the threaded hole 214.
[0044] An entrance 216 is arranged on the third portion 213 and is in communication with the receiving space 215 and serves as a functional opening of the receiving space 215, allowing the shaft carrying the shaft key to smoothly enter the receiving space 215. It should be noted that, after the shaft carrying the shaft key passes through the entrance 216 and enters the receiving space 215, the third portion 213 can be connected with the shaft key on the shaft.
[0045] Figure 4 A use state schematic diagram of the shaft key dismounting tool 200 according to an embodiment of the present application is shown in FIG. 2. Figure 4 As shown, when the shaft key dismounting tool 200 is used to dismount the shaft key 130 on the shaft 120 of the motor 100, the user only needs to pass the shaft 120 of the motor 100 through the entrance 216 of the third portion 213 of the puller 210, so that the shaft key 130 is stably connected (e.g., clamped) with the third portion 213, and then a pushing force is applied to the shaft 120 of the motor 100 by rotating the handle 220, so that the shaft key 130 can be smoothly and efficiently dismounted from the shaft 120 by the puller 210 (the third portion 213). It is easy for those skilled in the art to understand that, although the embodiment of the present application is described by taking the dismounting of the shaft key on the motor shaft as an example, this does not limit the application range of the shaft key dismounting tool 200 of the present application. The shaft key dismounting tool 200 can also be used for dismounting the shaft key of other equipment, such as the shaft key of a speed reducer, a generator, a hydraulic pump and the like.
[0046] According to an embodiment of the present application, as shown in Figure 2 and Figure 3 The first portion 211 can be annular. Specifically, the thickness of the first portion 211 is relatively small (compared with the second portion 212), the outer contour thereof can be various shapes, such as a cylindrical surface, a triangular prism surface or a quadrangular prism surface, etc.; and the threaded hole 214 is arranged at the middle position of the first portion 211.
[0047] According to one embodiment of the present application, as shown in Figure 2 and Figure 3 , the second part 212 can be a cylindrical structure, and the accommodation space 215 is formed inside the cylindrical structure. For the cylindrical structure of the second part 212, the inner contour and the outer contour can be various shapes, such as a cylindrical surface, a triangular prism surface, or a quadrangular prism surface, etc. It should be noted that the shapes of the inner contour and the outer contour of the second part 212 can be the same or different. For example, in the embodiment shown in Figure 2 and Figure 3 , the inner contour and the outer contour of the second part 212 are both cylindrical surfaces. Figure 5 shows a schematic diagram of the shaft key dismounting tool 200 according to another embodiment of the present application, as shown in Figure 5 , the second part 212 can also adopt a bracket structure. Specifically, this second part 212 can include at least two support rods 2121, which are connected between the first part 211 and the third part 213 at intervals, and the accommodation space 215 is formed in the support rods 2121.
[0048] Figure 6 shows a schematic diagram of the third part 213 according to one embodiment of the present application, as shown in Figure 3 and Figure 6 , the third part 213 can be an annular structure. Specifically, the third part 213 has a relatively small thickness (compared with the second part 212), and the outer contour can be various shapes, such as a cylindrical surface, a triangular prism surface, or a quadrangular prism surface, etc. For the annular structure of the third part 213, the central position has a through hole 217, which can be used as the aforementioned inlet 216. The through hole 217 can be understood as being composed of two holes, one of which has the same or similar shape as the shaft, for example: a circular shape; and the other of which has the same or similar shape as the shaft key, for example: a rectangular shape. This shape of the third part 213 can be clamped with the shaft key on the shaft, for example Figure 5 , after the user passes the shaft of the motor through the inlet 216 (the through hole 217) of the third part 213 of the puller 210, only needs to slightly rotate the puller 210, so as to realize the clamping of the third part 213 (the puller 210) and the shaft key, and then the puller 210 can pull the shaft key off the shaft. Those skilled in the art can easily understand that other shapes of the third part 213 can also achieve the above functions. For example Figure 7 shows a schematic diagram of the third part 213 according to another embodiment of the present application, as shown in Figure 7As shown, the third part 213 can be a fan-shaped structure. For the fan-shaped third part 213, an arc-shaped notch 218 is arranged at the edge position thereof, and preferably, the arc-shaped notch 218 is consistent with the outer contour of the rotating shaft, and the rotating shaft of the motor can enter the accommodating space 215 from the position of the arc-shaped notch 218.
[0049] According to an embodiment of the present application, as shown in Figure 3 and Figure 4 As shown, the threaded hole 214 on the first part 211 is aligned with the inlet 216 on the third part 213 in the first direction, so as to ensure that the handle 220 and the rotating shaft can be accurately aligned, thereby improving the use convenience of the shaft key dismounting tool 200 and improving the shaft key dismounting efficiency.
[0050] According to an embodiment of the present application, as shown in Figure 2 and Figure 3 As shown, the first part 211 and the second part 212 of the puller 210 adopt an integrated structure, and the third part 213 is a separate component independent of the first part 211 and the second part 212. The third part 213 and the second part 212 are detachably connected, for example, fixed by screw connection. Such design not only facilitates assembly and disassembly, but also improves the flexibility of use and the convenience of maintenance. In some embodiments, the second part 212 and the third part 213 of the puller 210 can also adopt an integrated structure, and the first part 211 is a separate component independent of the second part 212 and the third part 213, and the first part 211 and the second part 212 are detachably connected. In other embodiments, the first part 211, the second part 212 and the third part 213 of the puller 210 adopt an integrated structure, so that the puller 210 can be formed at one time, which is conducive to reducing the production cost of the puller 210. In other embodiments, the first part 211, the second part 212 and the third part 213 of the puller 210 are all separate components, wherein the first part 211 and the second part 212 are detachably connected, and the second part 212 and the third part 213 are detachably connected.
[0051] According to an embodiment of the present application, as shown in Figure 2 and Figure 3As shown, the handle 220 can include a holding part 221 and a threaded part 222. The threaded part 222 is an elongated rod member including a first end and a second end, and an outer thread is provided on the surface of the threaded part 222 to match the threaded hole 214. The holding part 221 is provided at one end of the threaded part 222 to provide a point of action for the user to hold and exert force, facilitating the user to rotate the handle 220. Preferably, a protective head can be provided at the second end of the threaded part 222 to protect the rotating shaft and avoid damage to the rotating shaft during the process of disassembling the shaft key. The protective head can be, for example, a rubber sleeve, a silica gel sleeve or a metal ball, wherein the metal ball is rotatably connected to the end face of the second end of the threaded part 222.
[0052] Compared with the prior art, the utility model embodiment provides a shaft key dismounting tool 200, which significantly improves the efficiency and safety of shaft key dismounting through the unique design of the puller 210 and the handle 220. Specifically, during the dismounting process, the user only needs to pass the rotating shaft of the motor through the inlet 216 of the third part 213 of the puller 210, so that the shaft key is stably connected (such as clamped) with the third part 213, and then a pushing force is applied to the rotating shaft of the motor by rotating the handle 220, so that the shaft key is smoothly and efficiently dismounted from the rotating shaft by the puller 210 (the third part 213). This design not only greatly simplifies the traditional cumbersome maintenance process and significantly shortens the maintenance time, but also significantly improves the work efficiency. More importantly, the tool is easy and intuitive to operate, and the user can independently complete the maintenance task without relying on professional technical support, thereby effectively reducing the maintenance cost and significantly improving the overall user experience of the equipment.
[0053] Finally, it should be noted that: the above only for the preferred embodiments of the utility model, and not for limiting the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A tooling for disassembling a shaft key, characterized in that, include: A puller includes a first part, a second part, and a third part arranged sequentially along a first direction. The first part has a threaded hole, the second part defines a receiving space, and the third part has an inlet. The threaded hole and the inlet are respectively connected to the receiving space. The third part is configured to connect a shaft key. The handle passes through the threaded hole and is threadedly connected to the threaded hole.
2. The key disassembly fixture according to claim 1, characterized in that, The first part is an annular structure, and the threaded hole is provided in the middle of the first part.
3. The key disassembly fixture according to claim 1, characterized in that, The second part is a cylindrical structure; or, The second part is a support structure, which includes at least two support rods.
4. The key disassembly fixture according to claim 1, characterized in that, The third part is a ring structure, with a through hole in the middle, and is configured to engage the shaft key; or... The third part is a fan-shaped structure, and the edge of the third part is provided with an arc-shaped notch. The third part is configured to be suitable for engaging the shaft key.
5. The key disassembly fixture according to any one of claims 1-4, characterized in that, The threaded hole and the inlet are aligned in the first direction.
6. The key disassembly fixture according to any one of claims 1-4, characterized in that, The first part, the second part, and the third part are of a single integrated structure; or, One of the first part and the third part is integrally formed with the second part, and the other of the first part and the third part is detachably connected to the second part; or... The first part is detachably connected to the second part, and the second part is detachably connected to the third part.
7. The key disassembly fixture according to claim 6, characterized in that, The detachable connection is a screw connection.
8. The key disassembly fixture according to claim 5, characterized in that, The handle includes: Controlling Department; and The threaded portion includes a first end and a second end, wherein the first end of the threaded portion is connected to the gripping portion.
9. The key disassembly fixture according to claim 8, characterized in that, The handle also includes a protective head, which is connected to the second end of the threaded portion.
10. The key disassembly fixture according to claim 9, characterized in that, The protective head is a rubber sleeve, a silicone sleeve, or a metal ball, wherein the metal ball is rotatably connected to the end face of the second end of the threaded portion.