A connection mechanism that tightly holds an electric motor shaft

Abstract

The utility model relates to a kind of and motor shaft's connection mechanism of holding tightly. The connection mechanism of this kind and motor shaft's holding tightly by the threaded connection between motor shaft and shaft coupling makes it in the process of using Effectively Realize the effect of convenient disassembly, ensure its convenience in the process of installation or disassembly;By inserting expansion sleeve between motor shaft and shaft coupling and locking it by locking member, it can effectively realize the close fit between motor shaft and shaft coupling, so as to provide greater torque and axial force;And this kind of way assembly difficulty is small, disassembly process will not damage the surface of motor shaft and shaft coupling;So that expansion sleeve can have greater shape degree, can increase its adaptability in the process of use, so as to realize without higher machining accuracy in the process of processing, reduce its processing cost.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a connection mechanism that clamps onto a motor shaft. Background Technology

[0002] The core purpose of connecting the motor shaft to the coupling is to achieve systematic optimization of power transmission. The coupling can effectively compensate for axial / radial installation deviations and reduce shaft vibration by more than 60%. At the same time, it provides overload protection, impact load buffering and electrical isolation functions. Its modular design makes maintenance easier and allows dynamic alignment adjustment within 0.05mm, significantly improving the reliability and life of the transmission system.

[0003] Currently, the connection between motor shafts and couplings is mainly achieved through key, pin, spline connection, interference fit, and internal and external expansion sleeves.

[0004] Existing connection methods have several problems. Keyed, pinned, and splined connections are difficult to machine, require high precision, and are costly, while also demanding high installation accuracy. In high-speed, overload, or frequent start-up applications, wear and deformation may occur. Interference fits can transmit large torques and axial forces, but strict control of the interference fit is required, assembly is difficult, disassembly can damage the shaft and coupling surfaces, and they cannot be repaired or reused. Internal and external expansion sleeves may loosen after long-term use, requiring regular inspection and tightening. Therefore, a connection mechanism that clamps to the motor shaft is proposed to solve these problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a connection mechanism that clamps onto the motor shaft. It has the advantages of simple parts processing, low dimensional accuracy requirements, low processing cost, simple assembly, and the ability to be repeatedly disassembled and repaired without the need for tooling fixtures. It is also less prone to loosening, thus solving the problem of inconvenient disassembly and assembly in existing technologies.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a connection mechanism for clamping a motor shaft, comprising a motor body, a motor shaft disposed on the motor body, a coupling detachably connected to the motor shaft, an expansion sleeve disposed inside the coupling for reinforcing its connection with the motor shaft, and a locking element disposed on the expansion sleeve for locking it to the coupling.

[0007] Furthermore, a threaded protrusion is provided at one end of the motor shaft that extends outside the motor body.

[0008] Furthermore, the coupling is provided with an output connection end and an input connection end that are interconnected. The motor shaft is connected to the input connection end. The inner diameter of the output connection end is larger than the inner diameter of the input connection end, and the connection point forms a stepped surface. Multiple mounting holes are provided on the stepped surface to facilitate the installation of the expansion sleeve.

[0009] Furthermore, the inner wall of the input connection end near the output connection end is a tapered surface with an inner diameter decreasing from left to right. A threaded groove is provided below the tapered surface, and the input connection end is threadedly connected to the motor shaft through the threaded groove.

[0010] Furthermore, the expansion sleeve includes an insertion end that is inserted between the motor shaft and the input connection end to form an interference fit. One end of the insertion end is provided with a limiting end that fits against the stepped surface. The limiting end is provided with connecting holes that are adapted to the number of mounting holes and are aligned with each other.

[0011] Furthermore, one end of the insertion end is provided with a tapered surface whose inner diameter increases from left to right.

[0012] Furthermore, both the limiting end and the insertion end are provided with adjustment grooves. The adjustment grooves extend along the axial direction of the limiting end and the insertion end, and their depth penetrates the thickness of the limiting end and the insertion end, so that the limiting end and the insertion end form a discontinuous annular structure.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] 1. The connection mechanism that clamps the motor shaft uses a threaded connection between the motor shaft and the coupling to effectively achieve easy disassembly during use, ensuring convenience during installation or disassembly.

[0015] 2. This type of connection mechanism that clamps the motor shaft can effectively achieve a tight fit between the motor shaft and the coupling by inserting an expansion sleeve between the motor shaft and the coupling and locking it with a locking device, thereby providing a large torque and axial force; and this method is easy to assemble, and the disassembly and assembly process will not damage the surface of the motor shaft and the coupling.

[0016] 3. By providing adjustment grooves at the limiting end and insertion end of the expansion sleeve, the expansion sleeve can have a greater degree of deformation, which increases its adaptability during use. This eliminates the need for high machining precision during processing and reduces its machining cost. Attached Figure Description

[0017] Figure 1 This is a front view of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the coupling structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the expansion sleeve structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the motor shaft structure of this utility model.

[0022] In the diagram: 1. Locking element; 2. Expansion sleeve; 21. Insertion end; 22. Limiting end; 23. Connecting hole; 3. Coupling; 31. Output connection end; 32. Input connection end; 33. Mounting hole; 4. Motor body; 41. Motor shaft. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 This embodiment describes a connection mechanism for clamping a motor shaft, comprising a motor body 4, on which a motor shaft 41 is mounted. The mechanism is characterized by a coupling 3 detachably connected to the motor shaft 41. The coupling 3 contains an expansion sleeve 2 for reinforcing its connection to the motor shaft 41, and the expansion sleeve 2 has a locking element 1 for locking it to the coupling 3. In practical use, the operator connects the coupling 3 to the motor shaft 41, then inserts the expansion sleeve 2 between the coupling 3 and the motor shaft 41 to create an interference fit, ensuring a tight connection between the coupling 3 and the motor shaft 41. Finally, the locking element 1 is inserted into the expansion sleeve 2 and the coupling 3 to lock them in place.

[0025] As a preferred technical solution in this embodiment, a threaded protrusion is provided at one end of the motor shaft 41 extending to the outside of the motor body 4. By providing a threaded protrusion on the motor shaft 41, it can achieve a detachable connection with the coupling 3, which has a more convenient detachable effect compared to the traditional connection method.

[0026] As a preferred technical solution in this embodiment: the coupling 3 is provided with an output connection end 31 and an input connection end 32 that are interconnected. The motor shaft 41 is connected to the input connection end 32. The inner diameter of the output connection end 31 is larger than the inner diameter of the input connection end 32, and the connection point forms a stepped surface. Multiple mounting holes 33 are provided on the stepped surface to facilitate the installation of the expansion sleeve 2. In actual use, the operator can connect the motor shaft 41 to the input connection end 32. By providing a stepped surface and mounting holes 33 on the stepped surface, the expansion sleeve 2 can be fixed, ensuring good stability of the expansion sleeve 2 during use. At the same time, the stepped surface can effectively limit the position of the expansion sleeve 2, further increasing the firmness of the expansion sleeve 2.

[0027] As a preferred technical solution in this embodiment: the inner wall of the input connection end 32 near the output connection end 31 is a tapered surface with an inner diameter decreasing from left to right. A threaded groove is provided below the tapered surface, and the input connection end 32 is threadedly connected to the motor shaft 41 through the threaded groove. By setting a portion of the inner wall of the output connection end 31 as a tapered surface, it facilitates the insertion of the expansion sleeve 2 during use and ensures a tighter fit between the expansion sleeve 2 and the input connection end 32, further improving the stability of the motor shaft 41 during operation.

[0028] As a preferred technical solution in this embodiment: the expansion sleeve 2 includes an insertion end 22 that is inserted between the motor shaft 41 and the input connection end 32 to form an interference fit. One end of the insertion end 22 is provided with a limiting end 21 that fits against the stepped surface. The limiting end 21 has connecting holes 23 that are adapted to and aligned with the number of mounting holes 33. In actual use, the operator can insert the insertion end 22 between the motor shaft 41 and the input connection end 32. Then, the operator can insert the locking member 1 into the connecting hole 23 provided on the limiting end 21, and insert its other end into the mounting hole 33. The operator can then rotate the locking member 1 to achieve the locking effect of the expansion sleeve 2. During this process, the locking member 1 can pull the limiting end 21 and the insertion end 22 inward until the limiting end 21 fits against the stepped surface in the coupling 3. At this time, the installation of the expansion sleeve 2 is completed.

[0029] As a preferred technical solution in this embodiment, one end of the insertion end 22 is provided with a tapered surface whose inner diameter increases from left to right. By providing a tapered surface on the insertion end 22, the fit between it and the coupling 3 can be guaranteed, and it can be easily inserted, thus ensuring its convenience during use.

[0030] In a preferred embodiment, both the limiting end 21 and the insertion end 22 are provided with adjustment grooves. These grooves extend axially along the limiting end 21 and the insertion end 22, penetrating their thickness to form a discontinuous annular structure. By providing adjustment grooves on the limiting end 21 and the insertion end 22, the device 2 can achieve greater flexibility, increasing its adaptability during use. This eliminates the need for high machining precision during processing, reducing manufacturing costs.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A connection mechanism for clamping with a motor shaft, comprising a motor body (4) and a motor shaft (41) disposed on the motor body (4), characterized in that: A coupling (3) is detachably connected to the motor shaft (41). An expansion sleeve (2) is provided inside the coupling (3) to reinforce its connection with the motor shaft (41). A locking element (1) is provided on the expansion sleeve (2) to lock it to the coupling (3).

2. The connection mechanism for clamping the motor shaft as described in claim 1, characterized in that: The motor shaft (41) has a threaded protrusion at one end extending to the outside of the motor body (4).

3. The connection mechanism for clamping the motor shaft as described in claim 1, characterized in that: The coupling (3) is provided with an output connection end (31) and an input connection end (32) that are interconnected. The motor shaft (41) is connected to the input connection end (32). The inner diameter of the output connection end (31) is larger than the inner diameter of the input connection end (32), and a stepped surface is formed at the connection. Multiple mounting holes (33) are provided on the stepped surface to facilitate the installation of the expansion sleeve (2).

4. The connection mechanism for clamping the motor shaft as described in claim 3, characterized in that: The inner wall of the input connection end (32) near the output connection end (31) is a tapered surface with an inner diameter decreasing from left to right. A threaded groove is provided below the tapered surface. The input connection end (32) is threadedly connected to the motor shaft (41) through the threaded groove.

5. The connection mechanism for clamping the motor shaft as described in claim 4, characterized in that: The expansion sleeve (2) includes an insertion end (22) that is inserted between the motor shaft (41) and the input connection end (32) to form an interference fit. One end of the insertion end (22) is provided with a limiting end (21) that fits against the stepped surface. The limiting end (21) is provided with connecting holes (23) that are adapted to and aligned with the number of mounting holes (33).

6. The connection mechanism for clamping the motor shaft as described in claim 5, characterized in that: One end of the insertion end (22) is provided with a tapered surface whose inner diameter increases from left to right.

7. The connection mechanism for clamping the motor shaft as described in claim 6, characterized in that: The limiting end (21) and the insertion end (22) are both provided with adjustment grooves. The adjustment grooves extend along the axial direction of the limiting end (21) and the insertion end (22), and their depth penetrates the thickness of the limiting end (21) and the insertion end (22), so that the limiting end (21) and the insertion end (22) form a discontinuous ring structure.

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