CN218771544U - Bearing frame, motor and unmanned aerial vehicle of motor - Google Patents

Abstract

The bearing seat comprises a bearing seat body and radiating fins, wherein the bearing seat body is annular, the outer peripheral surface of the bearing seat body is connected with a stator assembly of the motor, the inner peripheral surface of the bearing seat body is connected with a bearing sleeved outside a motor shaft of the motor, a cavity is formed on the bearing seat body, and the upper end and the lower end of the cavity are both open ends, so that airflow flowing into the motor can flow out of the motor after flowing through the bearing seat when a fan structure of the motor rotates; the heat dissipation fins are arranged on the bearing seat body and used for exchanging heat with air flowing through the bearing seat. The bearing seat can improve the heat dissipation effect of the motor, is beneficial to prolonging the service life of the stator assembly and improving the output torque and power density of the motor.

Description

Bearing frame, motor and unmanned aerial vehicle of motor

Technical Field

The utility model relates to the technical field of motors, specifically, relate to a bearing frame, motor and unmanned aerial vehicle of motor.

Background

The motor is used as a power source of common electrical appliances or various machines, and is an electromagnetic device for realizing electric energy conversion or transmission according to an electromagnetic induction law. The motor is at the conversion in-process of electric energy and mechanical energy, and its inside can produce a large amount of heats, if can not in time discharge these heats, the inside too high temperature of motor can cause the damage of the winding in the stator module of motor, and then influences the normal function and the reliability of motor to, high temperature also can make the magnet demagnetization in the rotor subassembly of motor, thereby makes the output torque of motor reduce, influences the power density of motor.

In the related art, in order to dissipate heat inside the motor, an air inlet and an air outlet are generally arranged on the motor, a fan structure is arranged inside the motor, and when the fan structure rotates, outside air enters the inside of the motor from the air inlet and flows out of the motor from the air outlet, so that heat inside the motor is taken away, and heat dissipation of the motor is achieved. However, the heat dissipation effect of the heat dissipation method is limited, only a small part of heat generated in the motor can flow out of the motor, and a good heat dissipation effect on the motor cannot be achieved, so that the power density of the motor is affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a bearing frame, motor and unmanned aerial vehicle of motor, this bearing frame can improve the radiating effect of motor, is favorable to prolonging stator module's life, improves the output torque and the power density of motor.

In order to achieve the above object, according to a first aspect of the present disclosure, the present disclosure provides a bearing seat of a motor, including a bearing seat body and a heat dissipation fin, wherein the bearing seat body is formed in an annular shape, an outer circumferential surface of the bearing seat body is connected to a stator assembly of the motor, an inner circumferential surface of the bearing seat body is connected to a bearing sleeved outside a motor shaft of the motor, a cavity is formed on the bearing seat body, and upper and lower ends of the cavity are both open ends, so that an airflow flowing into the motor can flow out of the motor after flowing through the bearing seat when a fan structure of the motor rotates;

the heat dissipation fins are arranged on the bearing seat body and used for exchanging heat with air flowing through the bearing seat.

Optionally, the heat dissipation fins include first heat dissipation fins, and the first heat dissipation fins are disposed in the cavities; and/or the presence of a gas in the gas,

the radiating fins comprise second radiating fins which are arranged on the outer peripheral surface of the bearing seat body and extend towards the direction far away from the bearing seat body.

Optionally, one end of the first heat dissipation fin is connected to a cavity wall of the cavity close to the outer circumferential surface of the bearing seat body, and a gap is formed between the other end of the first heat dissipation fin and the cavity wall of the cavity close to the inner circumferential surface of the bearing seat body.

Optionally, the bearing housing body includes a stator connection portion and an extension portion located below the stator connection portion, an outer circumferential surface of the stator connection portion is used for being connected with the stator assembly, and the second heat dissipation fin is disposed on the extension portion.

Optionally, the number of the first heat dissipation fins is multiple, and the multiple first heat dissipation fins are arranged at intervals along the circumferential direction of the bearing seat body; and/or the presence of a gas in the gas,

the second radiating fins are multiple and are arranged along the circumferential direction of the bearing seat body at intervals.

Optionally, turbulence generating structures are disposed on the heat dissipating fins, and the turbulence generating structures are configured to cause turbulence in the airflow passing through the heat dissipating fins.

Optionally, the turbulence generating structure comprises protrusions and/or grooves provided on the heat dissipating fins.

Optionally, the protrusions include a first protrusion and a second protrusion, the first protrusion and the second protrusion are arranged at intervals along the length direction of the heat dissipation fin, and the first protrusion and the second protrusion are respectively located on two opposite sides of the heat dissipation fin along the thickness direction of the heat dissipation fin.

According to a second aspect of the present disclosure, the present disclosure provides a motor, including a stator assembly, a rotor assembly, a fan structure, a motor shaft, a bearing, and the above bearing seat, wherein the bearing is sleeved on the motor shaft, an inner circumferential surface of a bearing seat body of the bearing seat is connected to the bearing, and an outer circumferential surface of the bearing seat body is connected to the stator assembly;

the motor is provided with a first air opening and a second air opening, the first air opening is positioned above the stator assembly, the second air opening is positioned below the stator assembly, the fan structure is used for enabling the interior of the motor to generate air flow flowing through the bearing seat, and the air flow flows in from one of the first air opening and the second air opening and flows out from the other air opening.

Optionally, the motor has at least one first tuyere group and at least one second tuyere group, each first tuyere group includes a plurality of first tuyeres arranged at intervals in the circumferential direction of the motor, and each second tuyere group includes a plurality of second tuyeres arranged at intervals in the circumferential direction of the motor;

the at least one first tuyere group and the at least one second tuyere group are arranged at intervals in the axial direction of the motor.

Optionally, the motor further comprises a motor base located below the stator assembly, and the lower end of the bearing base is mounted on the motor base;

the stator assembly comprises a stator core and a winding wound on the stator core;

the motor shaft penetrates through the upper rotor cover and is connected with the upper rotor cover, the annular magnetic yoke is located on the outer side of the stator assembly, the upper end of the annular magnetic yoke is connected with the upper rotor cover, an annular gap is formed between the lower end of the annular magnetic yoke and the motor base, and the magnet is mounted on the inner surface of the annular magnetic yoke;

the first air opening is formed in the rotor upper cover, the second air opening is formed in the motor base, and the fan structure is arranged on one side, facing the stator assembly, of the rotor upper cover.

According to a third aspect of the present disclosure, the present disclosure provides an unmanned aerial vehicle, including the above-mentioned motor.

Through the technical scheme, because the outer peripheral face of bearing frame body is connected with the stator module of motor, the heat that stator module produced in the course of the work can be transmitted for the bearing frame body, the bearing frame body is formed with the cavity that both ends are open end from top to bottom, the heat that stator module produced can carry out the heat exchange with the air in the cavity behind the heat transmission to the bearing frame body, thereby can reach the radiating effect of stator module to the motor, and still be provided with radiating fin on the bearing frame body, radiating fin also can take place the heat exchange with the air current of flowing through the bearing frame, radiating fin can increase the heat radiating area of bearing frame, be favorable to improving the holistic radiating effect of motor. The air current constantly flows in the motor and flows out the motor, can constantly take away stator module transmission and give the heat of bearing frame body, be favorable to the heat dissipation to the motor to can protect the stator module of motor (especially the winding in the stator module), prolong stator module's life, can effectively avoid the magnet in the rotor subassembly of motor to produce the demagnetization phenomenon because of the high temperature, be favorable to realizing the continuous output of motor high power.

When the bearing frame that this disclosure provided is installing in the motor after, because can be provided with a plurality of cavitys on the bearing frame body of bearing frame, still be provided with radiating fin on the bearing frame body to increased the runner space that the inside air current of inflow motor can flow through, makeed the airflow that can be used for heat convection to increase, be favorable to improving the radiating efficiency to the inside of motor. And because the flow channel space through which the air flow flows is increased, on one hand, the heat dissipation efficiency can be increased, the output torque and the power density of the motor are improved, on the other hand, the strong vibration and noise of the motor caused by the smaller flow channel space of the air flow can be weakened, and the noise pollution can be reduced.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic perspective view of an electric machine provided in an exemplary embodiment of the present disclosure;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

FIG. 3 is an enlarged schematic view of portion B of FIG. 1;

fig. 4 is a cross-sectional view of a motor provided in an exemplary embodiment of the present disclosure, wherein solid arrows indicate a flow direction of an air flow inside the motor;

FIG. 5 is an exploded view of an electric machine provided in an exemplary embodiment of the present disclosure;

fig. 6 is a perspective view of a bearing housing provided in a first exemplary embodiment of the present disclosure;

fig. 7 is a perspective view of a bearing housing provided in a second exemplary embodiment of the present disclosure;

fig. 8 is a perspective view of a bearing housing provided in a third exemplary embodiment of the present disclosure;

fig. 9 is a perspective view of a bearing housing provided in a fourth exemplary embodiment of the present disclosure;

fig. 10 is a schematic perspective view of a rotor upper cover of a motor according to an exemplary embodiment of the present disclosure.

Description of the reference numerals

1-a bearing seat body; 11-a stator connection; 12-an extension; 2-radiating fins; 21-first cooling fins; 22-second cooling fins; 3-a stator assembly; 31-a stator core; 32-winding; 4-motor shaft; 5-a bearing; 6-a cavity; 7-a fan structure; 8-a rotor assembly; 81-magnet; 82-a ring yoke; 83-rotor upper cover; 9-a motor base; 100-a turbulence generating structure; 101-a first protrusion; 102-a second protrusion; 200-a first tuyere group; 201-a first tuyere; 300-a second tuyere group; 301-a second tuyere; 400-annular gap.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise specified, terms of orientation such as "upper and lower" are used to refer to upper and lower in the drawing direction of the drawings, and particularly, as shown in fig. 1 to 10, "inner and outer" refer to inner and outer of the profile of each component itself, and terms such as "first" and "second" are used to distinguish one element from another element without order and importance.

As shown in fig. 4 to 9, according to a first aspect of the present disclosure, the present disclosure provides a bearing seat of a motor, including a bearing seat body 1 and heat dissipation fins 2, the bearing seat body 1 is formed into a ring shape, and the outer peripheral surface of the bearing seat body 1 is connected with a stator assembly 3 of the motor, the inner peripheral surface of the bearing seat body 1 is connected with a bearing 5 sleeved outside a motor shaft 4 of the motor, a cavity 6 is formed on the bearing seat body 1, both the upper and lower ends of the cavity 6 are open ends, so that an airflow flowing into the motor can flow out of the motor after flowing through the bearing seat when a fan structure 7 of the motor rotates, the heat dissipation fins 2 are disposed on the bearing seat body 1, and the heat dissipation fins 2 are used for exchanging heat with the airflow flowing through the bearing seat.

As shown in fig. 1 to 5 and 10, the motor is provided with a first air opening 201 and a second air opening 301 in the up-down direction, the motor is further provided with a fan structure 7 inside, the stator assembly 3 is located between the first air opening 201 and the second air opening 301, when the bearing seat is installed inside the motor, when the fan structure 7 rotates, the air flow flows in from one of the first air opening 201 and the second air opening 301 and flows out from the other, and because the cavity 6 is formed on the bearing seat body 1, the air flow flowing into the motor can flow through the bearing seat located inside the stator assembly 3, thereby bringing heat out of the motor. Because stator module 3 is the main source that the motor produced heat when operating condition, and stator module 3 connects at the outer peripheral face of bearing frame body 1, consequently, the heat that stator module 3 gived off can be transmitted the bearing frame, and the bearing frame can take place heat exchange with the inside air current of inflow motor, and then can transmit the heat that its absorptive stator module 3 gived off for the inside air current of inflow motor to can improve stator module 3's radiating efficiency, and then improve the holistic radiating efficiency of motor.

Through the technical scheme, because the outer peripheral face of bearing frame body 1 is connected with stator module 3 of motor, stator module 3 can transmit for bearing frame body 1 in the heat that the course of the work produced, bearing frame body 1 is formed with cavity 6 that both ends are open end from top to bottom, the heat transmission that stator module 3 produced can carry out the heat exchange with the air in the cavity 6 behind bearing frame body 1, thereby can reach the radiating effect of stator module 3 to the motor, and still be provided with radiating fin 2 on the bearing frame body 1, radiating fin 2 also can take place the heat exchange with the air current of flowing through the bearing frame, radiating fin 2 can increase the heat radiating area of bearing frame, be favorable to improving the holistic radiating effect of motor. The air current constantly flows in the motor and flows out the motor, can constantly take away stator module 3 and give the heat of bearing frame body 1, be favorable to the heat dissipation to the motor, thereby can protect the stator module 3 of motor (especially the winding 32 among the stator module 3), prolong stator module 3's life, magnet 81 in the rotor subassembly 8 that can effectively avoid the motor produces the demagnetization phenomenon because of the high temperature, be favorable to realizing the continuous output of motor high power.

When the bearing frame that this disclosure provided is installing in the motor after, because can be provided with a plurality of cavitys 6 on the bearing frame body 1 of bearing frame, still be provided with radiating fin 2 on the bearing frame body 1 to increased the runner space that the inside air current of inflow motor can flow through, makeed the airflow that can be used for heat convection to increase, be favorable to improving the radiating efficiency to the motor inside. And because the flow channel space through which the air flow flows is increased, on one hand, the heat dissipation efficiency can be increased, the output torque and the power density of the motor are improved, on the other hand, the strong vibration and noise of the motor caused by the smaller flow channel space of the air flow can be weakened, and the noise pollution can be reduced.

As an application scene, the bearing frame that this disclosure provided can be used for unmanned aerial vehicle's motor, in the unmanned aerial vehicle field, because unmanned aerial vehicle's volume and weight all receive the restriction, need adopt as far as possible small, light in weight but can export the motor of great output torque, and the bearing frame that this disclosure provided strengthens the radiating effect of motor through the improvement to the component part of motor itself to the output torque of motor has been improved, does benefit to unmanned aerial vehicle's flight.

The heat dissipation fins 2 may be disposed at any suitable position on the bearing seat body 1 as long as heat exchange can be performed with the airflow flowing into the motor, for example, in the first embodiment provided by the present disclosure, as shown in fig. 6, the heat dissipation fins 2 may include first heat dissipation fins 21, and the first heat dissipation fins 21 may be disposed in the cavity 6. Because first radiating fin 21 sets up in cavity 6 that both ends are open end about being, be favorable to making when the fan structure 7 of motor rotates to take place heat exchange between the air current that flows into in cavity 6 and first radiating fin 21, guarantee that first radiating fin 21 can be to the interior air current heat release of flowing of motor.

In a second embodiment provided by the present disclosure, as shown in fig. 7, the heat dissipation fins 2 may include second heat dissipation fins 22, and the second heat dissipation fins 22 may be disposed on the outer circumferential surface of the bearing housing body 1 and extend toward a direction away from the bearing housing body 1. Because the second heat dissipating fins 22 are arranged on the outer peripheral surface of the bearing housing body 1, the size, installation and the like of the second heat dissipating fins 22 are less limited, so that the heat dissipating area of the second heat dissipating fins 22 can be increased as much as possible, the second heat dissipating fins 22 are convenient to install, and when a flowing air flow is generated inside the motor, the second heat dissipating fins 22 can exchange heat with the air flow.

In a third embodiment provided by the present disclosure, as shown in fig. 5, 8 and 9, the first heat dissipation fins 21 may include first heat dissipation fins 21 and second heat dissipation fins 22, the first heat dissipation fins 21 may be disposed in the cavity 6, and the second heat dissipation fins 22 may be disposed on an outer circumferential surface of the bearing housing body 1 and extend toward a direction away from the bearing housing body 1. Because radiating fin 2 includes first radiating fin 21 and second radiating fin 22, stator module 3 transmits the heat that gives bearing frame body 1 can partly dispel the heat through the first radiating fin 21 that sets up in the cavity 6 of bearing frame body 1, another part can dispel the heat through the second radiating fin 22 that sets up at the outer peripheral face of bearing frame body 1, first radiating fin 21 and second radiating fin 22 set up on the bearing frame, but the area that stator module 3 heat transfer can be increased in the inside limited space of motor and the heat radiating area of bearing frame, be favorable to the heat dissipation to the motor.

Alternatively, as shown in fig. 6, 8 and 9, one end of the first heat dissipation fin 21 may be connected to the cavity wall of the cavity 6 near the outer circumferential surface of the bearing housing body 1, and the other end of the first heat dissipation fin 21 may have a gap with the cavity wall of the cavity 6 near the inner circumferential surface of the bearing housing body 1. Because stator module 3 is connected with the outer peripheral face of bearing frame body 1, the direction of transfer of stator module 3 transmission heat for bearing frame body 1 is from the outer peripheral face of bearing frame body 1 to the inner peripheral face of bearing frame body 1, and the one end of first radiating fin 21 is connected with the chamber wall of the outer peripheral face of bearing frame body 1, is favorable to stator module 3 to first radiating fin 21 transmission heat. And a gap is formed between one end of the first radiating fin 21, which is far away from the outer peripheral surface of the bearing seat body 1, and the cavity wall of the inner peripheral surface of the bearing seat body 1, so that the first radiating fin 21 can be conveniently installed on the bearing seat body 1.

In order to avoid interference between the second heat dissipation fins 22 of the bearing seat and the fan structure 7 located above the stator assembly 3 when the motor is installed, as shown in fig. 6, the bearing seat body 1 may include a stator connection portion 11 and an extension portion 12 located below the stator connection portion 11, as shown in fig. 5, 7, 8 and 9, the outer circumferential surface of the stator connection portion 11 is used for being connected with the stator assembly 3, and the second heat dissipation fins 22 may be disposed on the extension portion 12, that is, the second heat dissipation fins 22 are located below the stator assembly 3, so that the second heat dissipation fins 22 can both avoid the stator assembly 3, and the heat dissipation area of the bearing seat can be increased, which is beneficial for heat dissipation of the motor.

In order to enhance the heat dissipation effect of the bearing seat, as shown in fig. 5 to 9, the first heat dissipation fins 21 may be plural, the plural first heat dissipation fins 21 may be arranged at intervals along the circumferential direction of the bearing seat body 1, and/or the second heat dissipation fins 22 may be plural, the plural second heat dissipation fins 22 may be arranged at intervals along the circumferential direction of the bearing seat body 1, the plural first heat dissipation fins 21 and the plural second heat dissipation fins 22 arranged at intervals along the circumferential direction of the bearing seat body 1 can increase the heat dissipation area of the bearing seat on the one hand, on the other hand, the motor can be cooled from plural directions, heat generated by the stator assembly 3 can be more uniformly transferred to the bearing seat, and then the bearing seat cools from plural directions, thereby the heat dissipation of the motor can be accelerated, the damage of the stator assembly 3 caused by untimely heat dissipation of partial position of the stator assembly 3 can be effectively avoided, which is beneficial to normal operation of the motor and continuous output of high power of the motor.

In addition, in order to further improve the heat dissipation effect of the bearing seat, as shown in fig. 5 and 9, turbulence generating structures 100 may be disposed on the heat dissipation fins 2, and the turbulence generating structures 100 may be configured to generate turbulence in the airflow passing through the heat dissipation fins 2. When the air flow flows into the motor and flows out of the motor after flowing through the bearing seat, the heat exchange between the heat radiating fins 2 and the air flow flowing through the bearing seat can be carried out, in the process of convective heat exchange, the viscous laminar flow area close to the wall surfaces of the heat radiating fins 2 is the main thermal resistance of the convective heat exchange, when laminar flow flows, because the fluids among all layers are not mixed, the heat exchange mode is mainly conduction, and the turbulent flow is the intensive mixing among fluid particles of all layers, the heat exchange is greatly enhanced, in order to improve the effect of the convective heat exchange, the turbulent flow generating structure 100 arranged on the heat radiating fins 2 can enable the air flow flowing through the heat radiating fins 2 to generate the turbulent flow, thereby the original boundary layer can be damaged, the continuous exchange of the air flow can be enhanced, and the heat radiating effect of the bearing seat is favorably improved.

It should be noted that the turbulent flow generating structure 100 may be disposed on the first heat dissipating fin 21 and/or the second heat dissipating fin 22, which is not limited in the present disclosure.

In order to enable the air flow flowing through the heat dissipation fins 2 to maintain the heat exchange in the turbulent state, the turbulent flow generation structure 100 may include protrusions and/or grooves disposed on the heat dissipation fins 2, and the original boundary layer may be destroyed by the turbulent flow phenomenon of the protrusions and/or grooves, so as to achieve the heat exchange of the air flow in the turbulent state and enhance the effect of the convective heat exchange.

As shown in fig. 5 and 9, for the embodiment in which the heat dissipation fin 2 is provided with the protrusions, the protrusions may include a first protrusion 101 and a second protrusion 102, the first protrusion 101 and the second protrusion 102 may be arranged at intervals along the length direction of the heat dissipation fin 2, and the first protrusion 101 and the second protrusion 102 may be respectively located at two opposite sides of the heat dissipation fin 2 along the thickness direction thereof, that is, the first protrusion 101 and the second protrusion 102 are respectively arranged at two sides of the heat dissipation fin 2 along the thickness direction thereof, and the first protrusion 101 and the second protrusion 102 are located at different positions along the length direction of the heat dissipation fin 2, so that the first protrusion 101 and the second protrusion 102 can achieve turbulent flow at different positions on the wall surface of the heat dissipation fin 2, and damage the original boundary layers at different positions on the wall surface of the heat dissipation fin 2, which is beneficial to enable the air flow passing through the heat dissipation fin 2 to maintain a turbulent flow state for heat exchange.

It is understood that, in the above embodiment, the number of the first protrusions 101 and the second protrusions 102 may be one, or may be multiple, and the arrangement of the plurality of first protrusions 101 and the plurality of second protrusions 102 on the heat dissipation fin 2 is beneficial to enhance the turbulence intensity, and thus beneficial to enhance the convective heat transfer effect.

To the embodiment that the grooves are formed in the heat dissipation fins 2, the grooves can comprise first grooves and second grooves, the first grooves and the second grooves can be arranged at intervals along the length direction of the heat dissipation fins 2, and the first grooves and the second grooves can be respectively located on two opposite sides of the heat dissipation fins 2 along the thickness direction of the heat dissipation fins, so that the first grooves and the second grooves can achieve turbulence at different positions of the wall surfaces of the heat dissipation fins 2, original boundary layers at different positions of the wall surfaces of the heat dissipation fins 2 are damaged, and the heat exchange of turbulent flow states of air flows flowing through the heat dissipation fins 2 can be kept.

As shown in fig. 1 to 5, according to a second aspect of the present disclosure, the present disclosure provides a motor, including a stator assembly 3, a rotor assembly 8, a fan structure 7, a motor shaft 4, a bearing 5 and the bearing seat, where the bearing 5 is sleeved on the motor shaft 4, an inner circumferential surface of a bearing seat body 1 of the bearing seat is connected to the bearing 5, an outer circumferential surface of the bearing seat body 1 is connected to the stator assembly 3, the motor has a first air opening 201 and a second air opening 301, the first air opening 201 is located above the stator assembly 3, the second air opening 301 is located below the stator assembly 3, the fan structure 7 is configured to generate an air flow flowing through the bearing seat inside the motor, and the air flow flows in from one of the first air opening 201 and the second air opening 301 and flows out from the other.

Because the heat generated by the stator module 3 can be transferred to the bearing seat through heat conduction, the bearing seat and the airflow flowing through the bearing seat can realize heat transfer through heat convection, the stator module 3 is positioned between the first air opening 201 and the second air opening 301 of the motor, as shown in fig. 4, when the fan structure 7 of the motor rotates, the airflow between the rotor upper cover 83 and the stator module 3 flows out of the motor from the first air opening 201 due to the action of centrifugal force, the inside of the motor is in a negative pressure state, the outside air flows into the motor from the second air opening 301, and after flowing through the heat dissipation fins 2 of the bearing seat and the cavity 6 formed on the bearing seat, the motor flows out from the first air opening 201 under the action of centrifugal force, thereby forming a loop of the airflow (as shown by a solid arrow in fig. 4), the heat generated by the stator module 3 can be taken out of the motor, so as to realize heat dissipation of the motor, thereby being beneficial to protecting the stator module 3 of the motor and being beneficial to improving the output torque of the motor.

In order to enhance the heat dissipation effect of the motor, as shown in fig. 1 to 5, the motor may have at least one first tuyere group 200 and at least one second tuyere group 300, each first tuyere group 200 may include a plurality of first tuyeres 201 spaced apart in the circumferential direction of the motor, each second tuyere group 300 may include a plurality of second tuyeres 301 spaced apart in the circumferential direction of the motor, and the at least one first tuyere group 200 and the at least one second tuyere group 300 may be spaced apart in the axial direction of the motor. Here, the axial direction of the motor refers to the vertical direction of the drawing of the drawings, and may be specifically shown in fig. 1 to 10.

It is understood that the at least one first tuyere group 200 and the at least one second tuyere group 300 may be arranged at intervals in the axial direction of the motor to mean that: in the case where the motor includes one first tuyere group 200 and one second tuyere group 300, one first tuyere group 200 and one second tuyere group 300 may be spaced apart in the axial direction of the motor; for the case that the motor includes a plurality of first tuyere groups 200 and a plurality of second tuyere groups 300, the plurality of first tuyere groups 200 may be respectively disposed at intervals in the axial direction of the motor, the plurality of second tuyere groups 300 may be respectively disposed at intervals in the axial direction of the motor, and the plurality of first tuyere groups 200 and the plurality of second tuyere groups 300 may be disposed at intervals in the axial direction of the motor. Because the motor can be provided with the first air port group 200 and the second air port group 300 which are communicated with the outside air, when the fan structure 7 of the motor rotates, the air flow in the motor can flow into and flow out of the motor from the air ports, the heat exchange efficiency between the inside of the motor and the outside can be improved, and the power density of the motor can be improved.

Alternatively, as shown in fig. 1, 4 and 5, the motor may further include a motor base 9 located below the stator assembly 3, a lower end of the bearing base may be mounted on the motor base 9, the stator assembly 3 may include a stator core 31 and windings 32 wound on the stator core 31, the rotor assembly 8 may include a magnet 81, an annular yoke 82 and a rotor upper cover 83 located above the stator assembly 3, the motor shaft 4 may be inserted into the rotor upper cover 83 and connected with the rotor upper cover 83, the annular yoke 82 may be located outside the stator assembly 3, an upper end of the annular yoke 82 may be connected with the rotor upper cover 83, a lower end of the annular yoke 82 may have an annular gap 400 with the motor base 9, the magnet 81 may be mounted on an inner surface of the annular yoke 82, the first air opening 201 may be formed on the rotor upper cover 83, the second air opening 301 may be formed on the motor base 9, and the fan structure 7 may be disposed on a side of the rotor upper cover 83 facing the stator assembly 3.

Because first wind gap 201 sets up on rotor upper cover 83, second wind gap 301 forms on motor cabinet 9, stator module 3 and bearing frame are located between rotor upper cover 83 and the motor cabinet 9, as shown in fig. 10, fan structure 7 sets up on one side of rotor upper cover 83 towards stator module 3, when annular yoke 82 rotates, drive rotor upper cover 83 and rotate, and then drive fan structure 7 and rotate, the air between stator module 3 and the rotor upper cover 83 mainly flows out the motor from first wind gap 201, the inside negative pressure that consequently forms of motor, the cold air in the motor outside can get into inside the motor from second wind gap 301, flow through bearing frame body 1 and the radiating fin 2 that sets up on bearing frame body 1 again, then flow out the motor from first wind gap 201, thereby can take away the heat in the motor, be favorable to the normal operating of motor, be favorable to realizing the continuous output of motor high power. In addition, because the annular gap 400 is formed between the lower end of the annular magnetic yoke 82 and the motor base 9, air flow can flow into and out of the motor from the annular gap 400, and therefore the overall heat dissipation effect of the motor can be improved.

Optionally, in the above embodiment, the rotor upper cover 83 may include a top plate and a first annular side plate connected to the top plate, the first air opening 201 may be formed on the first annular side plate, and a plurality of first heat dissipation holes may be formed on the top plate, so as to facilitate heat exchange between the inside of the motor and the outside. The motor base 9 may include a bottom plate and a second annular side plate connected to the bottom plate, the second air opening 301 may be formed on the second annular side plate, and a plurality of second heat dissipation holes may be formed on the bottom plate, thereby facilitating heat dissipation inside the motor.

Alternatively, as shown in fig. 10, a plurality of ribs may be disposed on the inner side of the rotor upper cover 83, and the plurality of ribs may be disposed at intervals along the circumferential direction of the rotor upper cover 83, and the plurality of ribs jointly constitute the fan structure 7 of the motor. In another embodiment, a separate fan may be directly attached to the inside of the rotor cover 83.

According to a third aspect of the present disclosure, the present disclosure provides an unmanned aerial vehicle, including the above-mentioned motor.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (12)

1. A bearing housing for an electric motor, comprising:

the bearing seat body is annular, the outer peripheral surface of the bearing seat body is connected with a stator assembly of the motor, the inner peripheral surface of the bearing seat body is connected with a bearing sleeved outside a motor shaft of the motor, a cavity is formed on the bearing seat body, and the upper end and the lower end of the cavity are both open ends, so that airflow flowing into the motor can flow out of the motor after flowing through the bearing seat when a fan structure of the motor rotates;

and the radiating fins are arranged on the bearing seat body and are used for exchanging heat with the airflow flowing through the bearing seat.

2. The bearing housing of claim 1, wherein said heat fins comprise first heat fins disposed within said cavity; and/or the presence of a gas in the gas,

the radiating fins comprise second radiating fins which are arranged on the outer peripheral surface of the bearing seat body and extend towards the direction far away from the bearing seat body.

3. The bearing seat according to claim 2, wherein one end of the first heat dissipation fin is connected with the cavity wall of the cavity close to the outer circumferential surface of the bearing seat body, and a gap is formed between the other end of the first heat dissipation fin and the cavity wall of the cavity close to the inner circumferential surface of the bearing seat body.

4. A bearing housing according to claim 2, wherein the bearing housing body includes a stator connecting portion and an extension portion located below the stator connecting portion, an outer circumferential surface of the stator connecting portion being connected with the stator assembly, the second heat dissipating fin being provided on the extension portion.

5. The bearing housing of claim 2, wherein the first plurality of fins are spaced circumferentially of the housing body; and/or the presence of a gas in the gas,

the second radiating fins are multiple and are arranged along the circumferential direction of the bearing seat body at intervals.

6. A bearing housing according to any one of claims 1 to 5, wherein the heat sink fins are provided with turbulence generating formations configured to cause turbulence in the airflow passing over the heat sink fins.

7. A bearing housing according to claim 6, wherein the turbulence generating structure comprises protrusions and/or recesses provided on the heat sink fins.

8. The bearing housing according to claim 7, wherein the protrusions include a first protrusion and a second protrusion, the first protrusion and the second protrusion are spaced apart along a length direction of the heat dissipation fin, and the first protrusion and the second protrusion are respectively located at two opposite sides of the heat dissipation fin along a thickness direction thereof.

9. An electric motor, characterized by comprising a stator assembly, a rotor assembly, a fan structure, a motor shaft, a bearing and a bearing seat according to any one of claims 1 to 8, wherein the bearing seat is sleeved on the motor shaft, the inner circumferential surface of the bearing seat body of the bearing seat is connected with the bearing, and the outer circumferential surface of the bearing seat body is connected with the stator assembly;

the motor is provided with a first air opening and a second air opening, the first air opening is positioned above the stator assembly, the second air opening is positioned below the stator assembly, the fan structure is used for enabling the interior of the motor to generate air flow flowing through the bearing seat, and the air flow flows in from one of the first air opening and the second air opening and flows out from the other air opening.

10. The electric machine of claim 9, wherein the electric machine has at least one first tuyere group and at least one second tuyere group, each of the first tuyere groups comprising a plurality of the first tuyeres spaced apart in a circumferential direction of the electric machine, each of the second tuyere groups comprising a plurality of the second tuyeres spaced apart in the circumferential direction of the electric machine;

the at least one first tuyere group and the at least one second tuyere group are arranged at intervals in the axial direction of the motor.

11. The electric machine of claim 9 further comprising a motor mount located below said stator assembly, said bearing mount having a lower end mounted on said motor mount;

the stator assembly comprises a stator core and a winding wound on the stator core;

the motor shaft penetrates through the upper rotor cover and is connected with the upper rotor cover, the annular magnetic yoke is located on the outer side of the stator assembly, the upper end of the annular magnetic yoke is connected with the upper rotor cover, an annular gap is formed between the lower end of the annular magnetic yoke and the motor base, and the magnet is mounted on the inner surface of the annular magnetic yoke;

the first air opening is formed in the rotor upper cover, the second air opening is formed in the motor base, and the fan structure is arranged on one side, facing the stator assembly, of the rotor upper cover.

12. A drone, characterized in that it comprises an electric machine according to any one of claims 9-11.

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