CN218387031U

CN218387031U - Electric machine

Info

Publication number: CN218387031U
Application number: CN202221779248.9U
Authority: CN
Inventors: 左小兵; 李鑫; 李继威; 田军
Original assignee: Shenzhen Silicon Power Co ltd
Current assignee: Shenzhen Silicon Power Co ltd
Priority date: 2022-07-11
Filing date: 2022-07-11
Publication date: 2023-01-24
Anticipated expiration: 2032-07-11

Abstract

The utility model relates to the field of motor manufacturing, in particular to a motor, which comprises a rotor, a stator, a shell, a rotating shaft, a support piece, a first bearing and a second bearing; the rotor, the stator, the rotating shaft, the supporting piece, the first bearing and the second bearing are coaxially arranged in a cavity defined by the shell; the rotor is sleeved on the rotating shaft, the stator is sleeved on the rotor, the rotating shaft penetrates through the supporting piece, and the supporting piece is positioned at one end of the cavity; the first bearing is arranged in a second mounting cavity formed in the other end, far away from the supporting piece, of the cavity, and one end, far away from the supporting piece, of the rotating shaft is inserted into the first bearing; the second bearing is sleeved on the rotating shaft and arranged in a first mounting cavity formed in the supporting piece, and the axle centers of the first mounting cavity and the second mounting cavity are located on the same axis. By adopting the mode of coaxially arranging the integrated shell and the parts, the processing precision of the shell and the assembly precision of the parts are improved, and the system noise generated by vibration is reduced, so that the system noise of the motor is effectively reduced.

Description

Electric machine

Technical Field

The utility model relates to a motor field of making, especially a motor.

Background

With the development of science and technology, the application of the motor in daily life is more and more extensive. Some motors can rotate at speeds exceeding 100000r/min, and these motors have many advantages due to their high rotational speed and small size.

Current motor casing generally includes that a plurality of spare parts make up and forms, and current shell structure adopts cantilever beam structure and rear end to cover the structure mostly, and the system assembly precision and the system stability of these two kinds of shell structure's motor are relatively poor to it is great to lead to the vibration of spare part during operation in the motor, thereby has produced obvious system noise. There is therefore a need for a motor that can effectively reduce noise.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a motor, solved the great problem of current motor noise ingeniously.

In order to achieve the purpose, the utility model adopts the following technical proposal:

the utility model discloses a motor, which comprises a rotor, a stator, a shell, a rotating shaft, a supporting piece, a first bearing and a second bearing;

the shell is enclosed with a cavity, and the rotor, the stator, the rotating shaft, the supporting piece, the first bearing and the second bearing are coaxially arranged in the cavity; the rotor is sleeved on the rotating shaft, the stator is sleeved on the rotor, the rotating shaft penetrates through the supporting piece, and the supporting piece is positioned at one end of the cavity;

a second mounting cavity is formed in the other end, away from the supporting piece, of the cavity, the first bearing is mounted in the second mounting cavity, and one end, away from the supporting piece, of the rotating shaft is inserted in the first bearing; the supporting piece is provided with a first installation cavity, the second bearing is sleeved on the rotating shaft and arranged in the first installation cavity, and the axle centers of the first installation cavity and the second installation cavity are located on the same axis.

Optionally, an elastic member is further disposed in the support member, the elastic member and the second bearing are both disposed in the first mounting cavity, and two ends of the elastic member are respectively in contact with an outer surface of the second bearing and an inner surface of the support member.

Optionally, the housing comprises an inner shell and an outer shell, the inner shell being located within and connected to the outer shell, the cavity being formed in the inner shell, and the air duct being formed between the outer shell and the inner shell.

Optionally, the motor further comprises a fan blade, a third mounting cavity is formed in one end, close to the support member, of the air duct, and the fan blade is arranged in the third mounting cavity; the fan blades are provided with mounting holes, and the rotating shafts are inserted into the mounting holes and are rotationally connected with the fan blades; the axle center of third installation cavity and second installation cavity is located the same axis.

Optionally, the opening directions of the first mounting cavity, the second mounting cavity and the third mounting cavity are the same.

Optionally, an arc-shaped air deflector extending along the axial direction is arranged in the air duct, and the inner shell and the outer shell are connected through the arc-shaped air deflector.

Optionally, a winding element is provided on the stator.

Optionally, the motor further includes a circuit control board disposed on the inner housing.

Optionally, an avoiding opening is formed in one end, close to the first bearing, of the inner shell, and the circuit control board is electrically connected with the winding element through the avoiding opening.

Optionally, the stator is of circular six-slot construction.

The utility model has the advantages that compared with the prior art, the utility model improves the processing precision of the shell and the assembly precision of the parts by adopting the mode of coaxial arrangement of the integrated shell and the parts, thereby obviously improving the stability of the motor system during working and the uniformity and stability of the magnetic field of the motor during working; thereby better reducing the system noise of the motor and prolonging the service life of the motor.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

fig. 1 is an exploded schematic view of a motor according to the present invention;

fig. 2 is a schematic structural view of a motor according to the present invention;

fig. 3 is a schematic cross-sectional structural view of a motor according to the present invention;

fig. 4 is a schematic structural diagram of a motor according to the present invention;

fig. 5 is a schematic structural diagram of a housing according to the present invention;

fig. 6 is a schematic structural view of a fan blade according to the present invention;

fig. 7 is a schematic structural diagram of a housing according to the present invention;

fig. 8 is a schematic structural diagram of a housing according to the present invention;

fig. 9 is a schematic structural diagram of a supporting member according to the present invention;

fig. 10 is a schematic structural diagram of a stator according to the present invention.

In the figure: 110. a rotor; 120. a stator; 121. a winding element; 130. a housing; 131. an inner shell; 132. a housing; 133. an air duct; 1331. a third mounting cavity; 134. avoiding the opening; 135. a cavity; 1351. a second mounting cavity; 140. a rotating shaft; 150. a support member; 151. an elastic member; 152. a first mounting cavity; 160. a first bearing; 170. a second bearing; 180. a fan blade; 181. mounting holes; 190. an arc-shaped air deflector; 200. and a circuit control board.

Detailed Description

The utility model provides a motor, which improves the processing precision of the shell and the assembly precision of the parts by adopting the mode of coaxially arranging the integrated shell and the parts, thereby obviously improving the stability of the motor system during working and the uniformity and stability of the magnetic field of the motor during working; the air gap of the motor is more uniform, so that an air gap magnetic field is more stable when the rotor rotates, and vibration caused by torque fluctuation generated by magnetic field fluctuation is effectively reduced; the airflow gaps between the fan blades and the air duct are more uniform, so that the pressure on the fan blades is more uniform, and the noise generated by mechanical vibration of the fan blades due to pressure difference is effectively reduced; thereby better reducing the system noise of the motor and prolonging the service life of the motor.

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

Fig. 1 is an exploded schematic view of a motor provided by the present invention, fig. 2 is a schematic view of a motor structure provided by the present invention, fig. 3 is a schematic view of a cross-sectional structure of a motor provided by the present invention, fig. 8 is a schematic view of a housing provided by the present invention, and fig. 9 is a schematic view of a support member provided by the present invention; as shown in fig. 1, 2, 3, 8 and 9, the motor includes a rotor 110, a stator 120, a housing 130, a rotational shaft 140, a support 150, a first bearing 160 and a second bearing 170;

the housing 130 encloses a cavity 135, and the rotor 110, the stator 120, the rotating shaft 140, the support 150, the first bearing 160 and the second bearing 170 are coaxially arranged in the cavity 135; the rotor 110 is sleeved on the rotating shaft 140, the stator 120 is sleeved on the rotor 110, the rotating shaft 140 penetrates through the supporting piece 150, and the supporting piece 150 is located at one end of the cavity 135;

the other end of the cavity 135, which is far away from the support 150, opens into a second mounting cavity 1351, the first bearing 160 is mounted in the second mounting cavity 1351, and the end of the rotating shaft 140, which is far away from the support 150, is inserted in the first bearing 160; the supporting member 150 is provided with a first mounting cavity 152, the second bearing 170 is sleeved on the rotating shaft 140, the second bearing 170 is arranged in the first mounting cavity 152, and the axle centers of the first mounting cavity 152 and the second mounting cavity 1351 are located on the same axis.

The rotor 110, the stator 120, the housing 130, the rotating shaft 140, the supporting member 150, the first bearing 160, and the second bearing 170 are coaxially arranged to improve the assembly accuracy, so that the magnetic field of the motor system is more stable, and the vibration caused by the torque fluctuation generated by the magnetic field fluctuation is effectively reduced, thereby improving the stability and the service life of the motor system, and significantly reducing the noise generated by the vibration of the components.

Further, as shown in fig. 1 and 3, an elastic member 151 is further disposed in the support member 150, the elastic member 151 and the second bearing 170 are both disposed in the first mounting cavity 152, and both ends of the elastic member 151 are respectively in contact with an outer surface of the second bearing 170 and an inner surface of the support member 150.

The elastic member 151 can not only eliminate the bearing play generated during the operation of the motor, but also control the axial pressure of the bearing during the operation of the motor, thereby better reducing the operating noise of the bearing, prolonging the service life of the motor and improving the stability of the motor system during the operation.

It should be noted that, in the case of ensuring the elastic performance of the elastic element 151, the material of the elastic element 151 may be a common metal elastic material, or may be other non-metal elastic materials, such as plastic or rubber; in the embodiment of the present application, the material of the elastic member 151 is not particularly limited.

It should be noted that, under the condition that the elastic performance of the elastic element 151 is ensured, the elastic element 151 may be a spring or an elastic sheet, and in the embodiment of the present application, the form of the elastic element 151 is not specifically limited.

Specifically, fig. 5 is a schematic structural diagram of a housing according to the present invention, and as can be seen from fig. 5 and 8, the housing 130 includes an inner shell 131 and an outer shell 132, the inner shell 131 is located inside the outer shell 132 and connected to the outer shell 132, a cavity 135 is formed in the inner shell 131, and an air duct 133 is formed between the outer shell 132 and the inner shell 131.

Further, fig. 4 is a schematic structural diagram of a motor provided by the present invention, and fig. 6 is a schematic structural diagram of a fan blade provided by the present invention; as shown in fig. 1, 4, 5 and 6, the motor further includes a fan blade 180, a third mounting cavity 1331 is opened at one end of the air duct 133 close to the supporting member 151, and the fan blade 180 is disposed in the third mounting cavity 1331; the fan blade 180 is provided with a mounting hole 181, the rotating shaft 140 is inserted into the mounting hole 181 and is rotatably connected with the fan blade 180, and the axes of the third mounting cavity 1331 and the second mounting cavity 1351 are located on the same axis. The mounting holes 181 facilitate the mounting and positioning of the rotating shaft and the fan blades 180, and simplify the assembly process of the motor, thereby reducing the mounting difficulty and improving the production efficiency.

The third mounting cavity 1331 can improve the assembly accuracy of the fan blade 180, so that the air flow gap between the fan blade 180 and the air duct 133 is more uniform during operation, the pressure applied to the fan blade 180 is more uniform, and the noise generated by the mechanical vibration of the fan blade 180 is effectively reduced.

It should be noted that, in actual production, the cavity 135 is provided with a fixing limit of the first bearing 160 and a fixing limit of the stator 120, and the air duct 133 is provided with an installation limit of the fan blade 180, and these three parts can be processed at the same production station. The processing mode simplifies the processing technology of the shell 130, improves the processing precision and the assembling precision, and facilitates subsequent assembly, thereby improving the overall system stability of the motor, reducing the system noise and improving the efficiency of the motor to a certain extent.

Specifically, the opening directions of the first mounting cavity, the second mounting cavity and the third mounting cavity are the same. The mode is beneficial to simplifying the processing technology and improving the processing precision and the assembling precision, thereby improving the stability of the motor system and the stability of the magnetic field and further reducing the noise of the motor system.

It should be noted that "coaxial" in the coaxial arrangement of the rotor 110, the stator 120, the housing 130, the rotating shaft 140, the support 150, the first bearing 160 and the second bearing 170 means that all the components are assembled along the same axial line; the phrase "the opening directions are the same" in the case where the opening directions of first mounting cavity 152, second mounting cavity 1351 and third mounting cavity 1331 are the same means that first mounting cavity 152, second mounting cavity 1351 and third mounting cavity 1331 are opened and machined uniformly only from one side of cavity 135 away from first mounting cavity 152.

Specifically, as can be seen from fig. 2 and 3, an arc-shaped air deflector 190 extending along the axial direction is disposed in the air duct 133, and the inner casing 131 and the outer casing 132 are connected by the arc-shaped air deflector 190. The arc-shaped air deflector 190 can control the flow direction of air sucked by the fan blade 180, so that the direction of air flow is stable, controllable and more concentrated, and the vibration of the fan blade 180 caused by air flow disturbance can be reduced, thereby improving the heat dissipation effect of the motor during working and improving the stability of the fan blade 180 during working.

Specifically, fig. 10 is a schematic structural diagram of a stator according to the present invention; as shown in fig. 10, a winding element 121 is provided on the stator 120.

The winding method adopted by the winding element 121 is not interrupted during winding, and the winding operation for two phases is completed at one time. The winding method has the advantages that the times of wire passing, wire cutting and wire connection and the number of required wiring terminals can be reduced, so that the production process is simplified, and the production efficiency is improved.

Further, referring to fig. 1, 2 and 3, the motor further includes a circuit control board 200, and the circuit control board 200 is disposed on the inner case 131.

Specifically, fig. 7 is a schematic structural diagram of a housing according to the present invention; as shown in fig. 2 and 7, an escape opening 134 is opened at one end of the inner housing 131 close to the first bearing 160, and the circuit control board 200 is electrically connected to the winding element 121 through the escape opening 134. The bypass opening 134 can simplify the internal structure of the motor and facilitate the installation of the circuit control board 200.

Specifically, as shown in fig. 10, the stator 120 has a circular six-slot structure, which can make the magnetic field generated by the stator 120 more uniform, and reduce the vibration caused by the torque fluctuation due to the magnetic field fluctuation, so that the motor system is more stable, and the noise generated during the operation of the motor is reduced.

It should be noted that, when the motor is assembled, the end of the inner casing 131 close to the fan blades 180 of the rotor 110 and the stator 120 is inserted into the cavity 135, and this assembly method facilitates positioning and mounting the rotor 110 and the stator 120, which reduces the mounting difficulty to some extent.

The above description is only for the preferred embodiment of the present invention, and the above specific embodiments are not intended to limit the present invention. Within the scope of the technical idea of the present invention, various modifications and alterations can be made, and any person skilled in the art can make modifications, amendments or equivalent replacements according to the above description, all belonging to the protection scope of the present invention.

Claims

1. An electric machine comprising a rotor, a stator, a housing, a rotatable shaft, a support, a first bearing and a second bearing;

the shell encloses a cavity, and the rotor, the stator, the rotating shaft, the supporting piece, the first bearing and the second bearing are coaxially arranged in the cavity;

the rotor is sleeved on the rotating shaft, the stator is sleeved on the rotor, the rotating shaft penetrates through the supporting piece, and the supporting piece is positioned at one end of the cavity;

a second mounting cavity is formed in the other end, far away from the supporting piece, of the cavity, the first bearing is mounted in the second mounting cavity, and one end, far away from the supporting piece, of the rotating shaft is inserted in the first bearing;

the supporting piece is provided with a first installation cavity, the second bearing is sleeved on the rotating shaft, the second bearing is arranged in the first installation cavity, and the axle centers of the first installation cavity and the second installation cavity are located on the same axis.

2. The motor of claim 1, wherein an elastic member is further disposed in the supporting member, the elastic member and the second bearing are both disposed in the first mounting cavity, and both ends of the elastic member are respectively in contact with an outer surface of the second bearing and an inner surface of the supporting member.

3. The electric machine of claim 2 wherein the housing comprises an inner shell and an outer shell, the inner shell being positioned within and coupled to the outer shell, the cavity being formed in the inner shell, the outer shell and the inner shell forming an air channel therebetween.

4. The motor of claim 3, further comprising a fan blade, wherein a third mounting cavity is formed in one end of the air duct close to the support member, and the fan blade is arranged in the third mounting cavity; the fan blades are provided with mounting holes, and the rotating shafts are inserted into the mounting holes and are rotatably connected with the fan blades; the third installation cavity and the second installation cavity are located on the same axis.

5. The electric machine of claim 4, wherein the first mounting cavity, the second mounting cavity and the third mounting cavity have the same opening direction.

6. The electric machine of claim 4, wherein an axially extending arcuate air deflector is disposed within the air duct, the inner and outer shells being connected by the arcuate air deflector.

7. An electric machine as claimed in claim 6, characterized in that the stator is provided with winding elements.

8. The electric machine of claim 7 further comprising a circuit control board disposed on the inner housing.

9. The electric machine of claim 8 wherein an escape opening is provided in an end of said inner housing adjacent said first bearing, said circuit control board being electrically connected to said winding element through said escape opening.

10. The electric machine of claim 9 wherein the stator is a circular six-slot configuration.