A silent claw pole synchronous motor

Abstract

This utility model relates to the field of synchronous motor technology and provides a silent claw-pole synchronous motor, including a housing and a cover. A rotor is installed inside the housing, and the rotor includes a gear shaft. A rotating shaft is sleeved inside the gear shaft, and an elastic element is sleeved on the rotating shaft. One end of the elastic element contacts the cover, and the other end contacts the gear shaft to provide elastic support for the rotor. A plane bearing is provided between one end of the rotor and the inner cavity of the housing, and the plane bearing is sleeved on the rotating shaft. In this utility model, by setting an elastic element and a plane bearing in the rotor structure, the smoothness and quietness of the claw-pole synchronous motor are effectively improved. The elastic element provides elastic support for the rotor, absorbs vibrations generated during operation, significantly reduces noise caused by mechanical vibration, and improves the stability of motor operation; the plane bearing reduces the frictional resistance between the rotor and the housing.

Description

Technical Field

[0001] This utility model relates to the field of synchronous motor technology, and in particular to a silent claw pole synchronous motor. Background Technology

[0002] Claw-pole permanent magnet synchronous motors (PMSMs) are widely used in various industrial and consumer electronics products due to their high efficiency, compact structure, and good speed regulation performance. These motors typically consist of key components such as a housing, stator, rotor, and shaft. The rotor contains embedded permanent magnets, which interact with the magnetic field generated by the stator to achieve rotation. While meeting basic functional requirements, traditional claw-pole PMSM designs also face a series of technical challenges, particularly in noise control. With increasing market demands for quiet motor operation, effectively reducing motor noise during operation has become an important research direction.

[0003] The purpose of this invention is to solve the problem of high noise in traditional claw pole synchronous motors. Utility Model Content

[0004] The purpose of this invention is to solve the problem of high noise in traditional claw-pole synchronous motors. The invention employs the following technical solution:

[0005] A silent claw-pole synchronous motor includes a housing and a cover. A rotor is installed inside the housing. The rotor includes a gear shaft, and a rotating shaft is sleeved inside the gear shaft. An elastic element is sleeved on the rotating shaft. One end of the elastic element contacts the cover, and the other end of the elastic element contacts the gear shaft to provide elastic support for the rotor. A planar bearing is provided between one end of the rotor and the inner cavity of the housing. The planar bearing is sleeved on the rotating shaft and is used to reduce the friction between the rotor and the housing when the rotor rotates.

[0006] As described above, in a silent claw-pole synchronous motor, the planar bearing is a thrust ball bearing. The planar bearing includes a shaft ring and a shaft seat. The shaft ring contacts one end of the rotor, and the shaft seat contacts the inner cavity of the housing, so as to achieve effective transmission and support of the rotor axial force.

[0007] As described above, in a silent claw-pole synchronous motor, the inner cavity of the housing is provided with a groove that matches the shape of the bearing seat, and the bearing seat is disposed in the groove to achieve limiting and stable assembly of the bearing seat within the groove.

[0008] In the silent claw-pole synchronous motor described above, the height of the groove is the same as the height of the shaft seat.

[0009] As described above, in a silent claw-pole synchronous motor, the gear shaft is fixedly connected to the rotating shaft, and the rotating shaft is rotatably connected to the housing and the cover.

[0010] As described above, in a silent claw-pole synchronous motor, the gear shaft is rotatably connected to the rotating shaft, and one end of the rotating shaft is fixedly connected to the housing.

[0011] In the silent claw-pole synchronous motor described above, the elastic element is a spring.

[0012] As described above, in a silent claw-pole synchronous motor, a magnetic body is provided on the outer sleeve of the gear shaft. The magnetic body is an injection-molded magnet or ferrite, and the magnetic body is formed by powder metallurgy.

[0013] Implementing the embodiments of this utility model has the following beneficial effects:

[0014] 1. In this utility model, by incorporating elastic elements and planar bearings into the rotor structure, the smoothness and quietness of the claw pole synchronous motor are effectively improved. The elastic elements provide elastic support to the rotor, absorbing vibrations generated during operation, significantly reducing noise caused by mechanical vibration, and improving the stability of motor operation; the planar bearings reduce the frictional resistance between the rotor and the housing, further reducing noise and improving the transmission efficiency and service life of the motor. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of a silent claw pole synchronous motor according to this utility model.

[0017] Figure 2 This is an exploded view of a silent claw-pole synchronous motor according to this utility model.

[0018] Figure 3 This is a schematic diagram of the rotor structure of a silent claw pole synchronous motor according to this utility model.

[0019] Figure 4 This is a cross-sectional view of the housing of a silent claw-pole synchronous motor according to this utility model.

[0020] Figure 5 yes Figure 4 A magnified schematic diagram of the mechanism at point A in the middle.

[0021] As shown in the figure:

[0022] 1. Housing; 11. Groove; 12. Surface bearing; 2. Cover; 3. Rotor; 31. Gear shaft; 32. Elastic element; 33. Rotating shaft; 4. Stator; 5. Gear assembly. 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] like Figures 1 to 5 As shown, this utility model proposes a silent claw-pole synchronous motor, including a housing 1 and a cover 2. A rotor 3 is installed inside the housing 1, and a stator 4 is fitted over the rotor 3. The rotor 3 includes a gear shaft 31, which is connected to a gear assembly 5. A rotating shaft 33 is fitted inside the gear shaft 31, and an elastic element 32 is fitted over the rotating shaft 33. One end of the elastic element 32 contacts the cover 2, and the other end contacts the gear shaft 31, providing elastic support for the rotor 3. A planar bearing 12 is provided between one end of the rotor 3 and the inner cavity of the housing 1, and the planar bearing 12 is fitted over the rotating shaft 33. The planar bearing 12 reduces the friction between the rotor 3 and the housing 1 during rotation. The elastic element 32 pushes the rotor 3 towards the planar bearing 12. The use of elastic element 32 to elastically support rotor 3 significantly reduces noise generated by mechanical vibration during motor operation, improving the stability and quietness of motor operation and providing a more comfortable user environment. The application of flat bearing 12 not only reduces the frictional resistance between rotor 3 and housing 1, achieving lower noise levels, but also improves the overall transmission efficiency and service life of the motor. The overall design effectively solves the problem of high noise in traditional claw pole synchronous motors.

[0025] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the gear shaft 31 is fixedly connected to the rotating shaft 33, and the rotating shaft 33 is rotatably connected to the housing 1 and the cover 2. The fixed connection between the gear shaft 31 and the rotating shaft 33 enhances the rigidity and synchronization of the transmission structure, avoids slippage or wear problems caused by friction transmission, improves the reliability of motor operation, and avoids the instability caused by friction between the gear shaft and the sidewall of the rotating shaft in traditional structures. The rotatable connection between the rotating shaft 33 and the housing 1 and the cover 2 transforms the friction area from a large-scale sidewall friction to a localized small-scale friction, effectively reducing friction noise and further improving the motor's quietness performance.

[0026] Optionally, in some embodiments, the gear shaft 31 is rotatably connected to the rotating shaft 33, and one end of the rotating shaft 33 is fixedly connected to the housing 1. Although the friction fit method in the conventional structure is retained, by introducing the elastic element 32 and the plane bearing 12 into the rotor 3 structure, the vibration and noise caused by friction can be effectively absorbed and mitigated.

[0027] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the planar bearing 12 is a thrust ball bearing. The planar bearing 12 includes a ring and a seat. The ring contacts one end of the rotor 3, and the seat contacts the inner cavity of the housing 1 to effectively transmit and support the axial force of the rotor 3. The inner cavity of the housing 1 has a groove 11 that matches the shape of the seat. The seat is disposed in the groove 11 to achieve limiting and stable assembly of the seat within the groove 11, improving assembly accuracy and structural reliability, and preventing displacement during operation. Using a thrust ball bearing as the planar bearing 12 can effectively withstand the axial load of the rotor 3, improving the operating stability of the motor under complex working conditions. Compared with sliding friction, the rolling friction characteristics of the thrust ball bearing significantly reduce frictional resistance and noise levels, further improving the quietness of the motor.

[0028] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the height of the groove 11 is consistent with the height of the bearing seat. This ensures that after assembly, the end face of the bearing seat remains flush with or tightly fitted to the corresponding surface of the inner cavity of the housing 1, preventing axial movement or loosening of the bearing seat during operation, and improving the overall stability of the bearing system. When the rotor 3 rotates, the axial force is transmitted through the rotor end face to the shaft ring of the thrust ball bearing, then through the rolling elements to the bearing seat, and finally evenly transmitted by the bearing seat to the housing 1, achieving effective transmission and support of the axial force.

[0029] Furthermore, as a preferred embodiment of the invention and not a limitation thereof, the elastic element 32 is a spring. In its compressed state, the spring applies a continuous elastic force to the rotor 3, pressing the rotor 3 towards the plane bearing 12, ensuring the rotor remains stable during rotation and reducing vibration and noise caused by axial clearance. When the motor generates minor vibrations or axial displacement during operation, the spring can absorb vibration energy through its own elastic deformation, playing a buffering and shock-absorbing role, and improving the smoothness of motor operation.

[0030] Furthermore, as a preferred embodiment of the invention and not a limitation thereof, the gear shaft 31 is fitted with a magnetic material, which is an injection-molded magnet or ferrite, and the magnetic material is formed by powder metallurgy. The rotating shaft 33 is integrally formed with the gear shaft 31 by insert injection molding.

[0031] Example 1:

[0032] This utility model proposes a silent claw-pole synchronous motor, including a housing 1 and a cover 2. A rotor 3 is installed inside the housing 1, and a stator 4 is fitted over the rotor 3. The rotor 3 includes a gear shaft 31, which is connected to a gear assembly 5. A rotating shaft 33 is fitted inside the gear shaft 31, and an elastic element 32 is fitted over the rotating shaft 33. One end of the elastic element 32 contacts the cover 2, and the other end contacts the gear shaft 31, providing elastic support for the rotor 3. A planar bearing 12 is provided between one end of the rotor 3 and the inner cavity of the housing 1, fitted over the rotating shaft 33. The planar bearing 12 reduces the friction between the rotor 3 and the housing 1 during rotation. The elastic element 32 pushes the rotor 3 towards the planar bearing 12. The use of elastic element 32 to elastically support rotor 3 significantly reduces noise generated by mechanical vibration during motor operation, improving the stability and quietness of motor operation and providing a more comfortable user environment. The application of flat bearing 12 not only reduces the frictional resistance between rotor 3 and housing 1, achieving lower noise levels, but also improves the overall transmission efficiency and service life of the motor. The overall design effectively solves the problem of high noise in traditional claw pole synchronous motors.

[0033] The gear shaft 31 is fixedly connected to the rotating shaft 33, which is rotatably connected to the housing 1 and the cover 2. The fixed connection between the gear shaft 31 and the rotating shaft 33 enhances the rigidity and synchronization of the transmission structure, avoids slippage or wear problems caused by friction transmission, improves the reliability of motor operation, and avoids the instability caused by friction between the gear shaft and the side wall of the rotating shaft in traditional structures. The rotatable connection between the rotating shaft 33 and the housing 1 and the cover 2 transforms the friction area from large-scale side wall friction to localized small-scale friction, effectively reducing friction noise and further improving the motor's quietness.

[0034] The thrust ball bearing 12 comprises a shaft ring and a bearing seat. The shaft ring contacts one end of the rotor 3, and the bearing seat contacts the inner cavity of the housing 1 to effectively transmit and support the axial force of the rotor 3. The inner cavity of the housing 1 has a groove 11 that matches the shape of the bearing seat. The bearing seat is positioned within the groove 11 to achieve limiting and stable assembly of the bearing seat within the groove 11, improving assembly accuracy and structural reliability, and preventing displacement during operation. Using a thrust ball bearing as the thrust ball bearing 12 effectively withstands the axial load of the rotor 3, improving the motor's operational stability under complex conditions. Compared to sliding friction, the rolling friction characteristics of the thrust ball bearing significantly reduce frictional resistance and noise levels, further improving the motor's quietness. The height of the groove 11 is the same as the height of the bearing seat. This ensures that after assembly, the end face of the bearing seat remains flush or tightly fitted with the corresponding surface of the inner cavity of the housing 1, preventing axial movement or loosening of the bearing seat during operation and improving the overall stability of the bearing system. When the rotor 3 rotates, the axial force is transmitted through the rotor end face to the shaft ring of the thrust ball bearing, then through the rolling elements to the bearing seat, and finally evenly transmitted by the bearing seat to the housing 1, achieving effective transmission and support of the axial force.

[0035] The elastic element 32 is a spring. When compressed, the spring applies a continuous elastic force to the rotor 3, pressing it towards the plane bearing 12 to ensure stability during rotation and reduce vibration and noise caused by axial clearance. When the motor experiences minor vibrations or axial displacement during operation, the spring absorbs vibration energy through its elastic deformation, acting as a buffer and shock absorber, thus improving the smoothness of motor operation.

[0036] The gear shaft 31 is fitted with a magnetic material, which is either injection-molded magnet or ferrite and is formed using powder metallurgy. The rotating shaft 33 is integrally formed with the gear shaft 31 using an insert injection molding process.

[0037] Example 2:

[0038] The difference between Embodiment 2 and Embodiment 1 is that the gear shaft 31 is rotatably connected to the rotating shaft 33, and one end of the rotating shaft 33 is fixedly connected to the housing 1. Although the friction fit method in the traditional structure is retained, by introducing the elastic element 32 and the plane bearing 12 into the rotor 3 structure, the vibration and noise caused by friction can be effectively absorbed and mitigated.

[0039] Specifically, the working principle of this invention is as follows:

[0040] When the motor is running, the current passes through the stator 4 windings to generate a rotating magnetic field, which interacts with the magnetic material in the rotor 3, driving the rotor 3 to rotate synchronously. The rotor 3 transmits power to the external gear assembly 5 via a gear shaft 31. Inside the gear shaft 31 is a rotating shaft 33, which is fixedly connected to the gear shaft 31 and forms a rotatable connection with the housing 1 and the cover 2. This structure avoids the instability caused by traditional sidewall friction, concentrating the friction area in a small local area, thereby significantly reducing operating noise.

[0041] An elastic element 32, preferably a spring structure, is fitted onto the rotating shaft 33. One end of the spring contacts the cover 2, and the other end acts on the gear shaft 31. Under compression, it applies a continuous elastic force to the rotor 3, pushing the rotor 3 toward the plane bearing 12. This elastic support structure can absorb the minor vibrations generated during motor operation, improving the smoothness and quietness of operation.

[0042] At one end of the rotor 3, a thrust ball bearing as a planar bearing 12 is provided, including a shaft ring and a shaft seat. The shaft ring contacts the rotor 3, and the shaft seat is embedded in a groove 11 in the inner cavity of the housing 1, with the height of the groove 11 matching the height of the shaft seat, thus achieving the limiting and stable assembly of the shaft seat. This bearing structure not only effectively transmits the axial force of the rotor 3 but also significantly reduces frictional resistance and noise through rolling friction. Meanwhile, the gear shaft 31 is sleeved with a magnetic material (injection-molded magnet or ferrite) formed by powder metallurgy, and is integrally formed with the rotating shaft 33 through insert injection molding, enhancing structural strength and magnetic properties, and improving the overall operating efficiency and stability of the motor.

[0043] In summary, this invention solves the problem of high noise in traditional claw-pole synchronous motors.

[0044] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information. In addition, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A silent claw pole synchronous motor comprising a casing (1), a cover (2), a rotor (3) installed in the casing (1), characterized in that, The rotor (3) includes a gear shaft (31), a rotating shaft (33) is sleeved inside the gear shaft (31), and an elastic element (32) is sleeved on the rotating shaft (33). One end of the elastic element (32) contacts the cover (2), and the other end of the elastic element (32) contacts the gear shaft (31) to achieve elastic support for the rotor (3). A plane bearing (12) is provided between one end of the rotor (3) and the inner cavity of the housing (1). The plane bearing (12) is sleeved outside the rotating shaft (33) and is used to reduce the friction between the rotor (3) and the housing (1) when the rotor (3) rotates.

2. A silent claw-pole synchronous motor according to claim 1, characterized in that, The planar bearing (12) is a thrust ball bearing. The planar bearing (12) includes a ring and a seat. The ring contacts one end of the rotor (3), and the seat contacts the inner cavity of the housing (1) to achieve effective transmission and support of the axial force of the rotor (3).

3. A silent claw-pole synchronous motor according to claim 2, characterized in that, The inner cavity of the housing (1) is provided with a groove (11) that matches the shape of the bearing seat. The bearing seat is disposed in the groove (11) to achieve the limiting and stable assembly of the bearing seat in the groove (11).

4. A silent claw-pole synchronous motor according to claim 3, characterized in that, The height of the groove (11) is the same as the height of the bearing seat.

5. A silent claw-pole synchronous motor according to claim 1, characterized in that, The gear shaft (31) is fixedly connected to the rotating shaft (33), and the rotating shaft (33) is rotatably connected to the housing (1) and the cover (2).

6. A silent claw-pole synchronous motor according to claim 1, characterized in that, The gear shaft (31) is rotatably connected to the rotating shaft (33), and one end of the rotating shaft (33) is fixedly connected to the housing (1).

7. A silent claw-pole synchronous motor according to claim 1, characterized in that, The elastic element (32) is a spring.

8. A silent claw-pole synchronous motor according to claim 1, characterized in that, The gear shaft (31) is fitted with a magnetic body, which is an injection-molded magnet or ferrite, and the magnetic body is formed by powder metallurgy.

Images