CN216699733U

CN216699733U - Internal magnetic power fan of hub motor

Info

Publication number: CN216699733U
Application number: CN202220003079.3U
Authority: CN
Inventors: 罗波; 沈词书; 郑巍
Original assignee: Lima Vehicle Industry Group Co ltd
Current assignee: Lima Vehicle Industry Group Co ltd
Priority date: 2022-01-04
Filing date: 2022-01-04
Publication date: 2022-06-07
Anticipated expiration: 2032-01-04

Abstract

The utility model discloses an internal magnetic power fan of a hub motor, which belongs to the technical field of electric vehicle motors and solves the problem that a heat dissipation device is inconvenient to arrange in the existing electric vehicle hub motor, thereby providing the internal magnetic power fan of the hub motor.

Description

Internal magnetic power fan of hub motor

Technical Field

The utility model relates to a hub motor, in particular to a magnetomotive fan which is arranged in the hub motor and used for realizing the internal heat dissipation of the hub motor.

Background

The electric vehicle is taken as a portable vehicle, brings convenience for people's trip, can carry people and objects, and is a very important tool at home. The electric vehicle is provided with walking power by a motor, and the motor on the existing electric vehicle is usually arranged at the hub position of a rear wheel. The motor is marchd the in-process at the electric motor car, can be got electric and last for electric motor car output power, stator and rotor in the motor can last the emergence relative rotation in the course of the work, these physics and mechanical action and make the motor can produce a large amount of heats after working a period, if produced heat can not fully derive in the motor, and in motor cohesion, this can bring the influence for the machinery and the physical properties of motor, long-time work back, can bring tired damage for the motor, thereby can influence the working property and the life of motor.

Chinese patent document (publication number: CN 207621075U) discloses a motor fan heat dissipation hub structure and a cooling fan formed by the same, the motor fan heat dissipation hub structure comprises a fan hub, a motor accommodating cavity is formed inside the fan hub, a plurality of ventilation slots are formed along the edge of the fan hub, the fan hub is provided with ventilation holes, and the ventilation slots are communicated with the motor accommodating cavity through the ventilation holes; cooling fan includes motor fan heat dissipation wheel hub structure, fan body and motor body, and open motor casing bottom has a plurality of motor air intake, and open motor casing top has a plurality of motor air outlet, and motor casing inside has the clearance passageway of intercommunication motor air intake, motor air outlet, and each ventilation hole of motor fan heat dissipation wheel hub is linked together with the motor air outlet respectively. The heat generated by the motor body of the utility model forms an air flow circulating system through the motor air inlet, the motor air outlet, the vent hole and the ventilation groove, so that the heat in the motor body is discharged into the outside air under the air flow.

The heat dissipation hub structure of the fan can provide a heat dissipation effect for the motor when rotating, but the fan needs a large space during working, and the axial size of the fan is relatively large, so that the heat dissipation hub structure of the fan is inconvenient to arrange in the hub motor of the electric vehicle.

SUMMERY OF THE UTILITY MODEL

The technical problems to be solved by the utility model are as follows: the utility model provides a magnetic power fan in wheel hub motor can set up in the wheel hub motor, and compact structure nature is good, and the drive of being convenient for provides the radiating effect for the wheel hub motor through rotating.

In order to solve the technical problem, the technical scheme of the utility model is as follows: the utility model provides a magnetic power fan in-wheel motor, including the annular body of circle, integrated into one piece has a plurality of blades that stretch out to the outside on the outer peripheral face of body, these blades equipartition in the circumference of body, the body cup joints and fixes on the bearing, a serial communication port, the outer peripheral face of body is the table surface, integrated into one piece has annular hookup body of circle on the back of body, the hookup body is located the radial outside of bearing, the hookup body sets up with the body is coaxial, be equipped with a plurality of power magnets on the hookup body, these power magnets are along the circumference interval equipartition of hookup body, in the footpath of hookup body, polarity between two adjacent power magnets is opposite.

The spherical table surface is the outer peripheral surface of the spherical table obtained by cutting off a small spherical crown on the outer side of a large spherical crown; it can also be expressed as: after the sphere is cut by the two parallel planes, the peripheral surface of the table between the two planes is formed.

The magnetic power fan is driven by magnetic force, usually, a driving magnet is arranged on the inner end face of an end cover of a hub motor, the driving magnet extends into the axial position of the power magnet, and when the driving magnet rotates along with the end cover, the driving magnet can drive the fan to rotate circumferentially through the magnetic force. The number of the driving magnets can be set to be larger than that of the power magnets, so that the fan can rotate in an accelerating mode, the electric vehicle can drive the fan to rotate effectively in the hub motor when running at a low speed, air flow in the hub motor can be stirred, and heat in the motor is prevented from accumulating.

Furthermore, a notch for embedding the power magnet is arranged on the connecting body, and the wall body of the notch protrudes towards the radial outer side of the connecting body.

Furthermore, the power magnet is arc-shaped, the radians of the power magnet and the radian of the connecting body are the same, and the power magnet is arranged in the circumferential direction of the connecting body.

Furthermore, the power magnet is attached and fixed on the inner wall surface of the gap wall body.

Furthermore, a ferrule is integrally formed at the inner opening of the body, the ferrule extends out towards the back of the body, the ferrule and the connecting body are coaxially arranged, the ferrule is sleeved on the bearing, and a gap is reserved between the ferrule and the power magnet in the radial direction of the body.

Furthermore, a plurality of reinforcing pieces are integrally formed on the back surface of the body, the reinforcing pieces are arranged in the radial direction of the body, and two ends of each reinforcing piece are respectively connected with the back surface of the body and the connecting body.

Further, in the axial direction of the body, both ends of the blade intersect at both side edges of the outer peripheral surface of the body.

Compared with the prior art, the utility model has the following beneficial effects: the fan is arranged in the hub motor, the fan rotates in the motor, air flow inside the motor can be stirred, heat is prevented from accumulating inside the motor, heat inside each position of the motor is balanced, hot air inside the motor can be in full contact with the motor end cover, heat transfer efficiency of the motor end cover can be effectively improved, and the service life of the motor can be effectively guaranteed. The power magnet is arranged on the fan, the rotation of the fan can be realized through magnetic force, and the assembly is convenient. The connecting body is positioned on the radial outer side of the bearing, and a space can be formed on the back of the fan by combining the shape of the peripheral surface of the body, so that the driving magnet can extend into the space, magnetic driving can be realized between the driving magnet and the power magnet in the radial direction, the heat dissipation device in the hub motor has a good structure compactness, does not occupy too much space inside the hub motor, and can be well adapted to the axial size of the hub motor. The polarity arrangement requirement of the power magnet can be well adapted to the magnetic drive of the fan, and the rotation of the fan is conveniently driven.

Drawings

Fig. 1 is a rear perspective view of a magnetomotive fan in the present hub motor.

Fig. 2 is a view showing the structure of fig. 1 with the power magnet and the bearing removed.

Fig. 3 is a front view of the magneto-dynamic fan in the present hub motor.

Fig. 4 is a sectional view taken along a-a in fig. 3.

In the figure, 1, a body; 2. a blade; 3. a powered magnet; 4. a coupling body; 5. a bearing; 6. a reinforcing sheet; 7. a ferrule; 8. and (4) a notch.

Detailed Description

With the help of the drawings of the specification, the magnetomotive fan is arranged in a hub motor of an electric vehicle, and is driven by magnetic force to rotate so as to stir the air flow in the hub motor, so that the heat in the motor is not accumulated, and the heat in the motor can be well led out to the outside by a motor end cover. The structure of the hub motor comprises a circular hub, two end covers are respectively arranged at two axial ends of the hub, a driving frame is arranged on the inner end face of one end cover, a plurality of driving magnets are arranged on the driving frame, and the driving magnets extend towards the direction of the magnetic power fan. When the driving frame rotates along with the end cover, the magnetic force generated by the driving magnet is used for driving the fan by magnetic force, so that the fan rotates in the circumferential direction in the hub motor.

The structure of the magnetic power fan comprises a circular body 1, wherein the body 1 is of a thin-wall structure, and the thickness of the body is about three millimeters. A plurality of blades 2 extending towards the outside are integrally formed on the outer peripheral surface of the body 1, the blades 2 are radially and uniformly distributed on the circumferential direction of the body 1, and the body 1 and the blades 2 are usually integrally formed by plastics. The vanes 2 are arc-shaped, both ends of the vanes 2 intersect at both side edges of the outer peripheral surface of the body 1 in the axial direction of the body 1, and the vanes 2 are arranged over the entire width of the outer peripheral surface of the body 1.

The body 1 is sleeved and fixed on the bearing 5, the bearing 5 is sleeved and fixed on the motor shaft, and the body 1 can freely rotate on the bearing 5.

The peripheral surface of body 1 is the table surface, and body 1 itself is thin wall structure, and the big head end of body 1 is towards the end cover of motor, and the little head end is towards the stator of in-wheel motor. The back of the body 1 is integrally provided with a circular ring-shaped connecting body 4, the connecting body 4 is positioned at the radial outer side of the bearing 5, and the connecting body 4 is coaxially arranged with the body 1. The connecting body 4 is provided with a plurality of power magnets 3, the figure shows that the power magnets 3 are four, and the four power magnets 3 are uniformly distributed at intervals along the circumferential direction of the connecting body 4. In the radial direction of the coupling body 4, the polarities of the two adjacent power magnets 3 are opposite, that is, the inner end of one power magnet 3 in the two power magnets 3 is the S pole, and the inner end of the other power magnet 3 is the N pole.

The power magnet 3 is directly fixed on the connecting body 4, and a gap 8 for embedding the power magnet 3 is arranged on the connecting body 4. The notch 8 is provided with a wall body, the wall body of the notch 8 protrudes out towards the radial outer side of the connecting body 4, and the wall body of the notch 8 wraps the power magnet 3, so that the position stability of the power magnet 3 is ensured, and the requirement on the position when the power magnet 3 rotates can be well met. The power magnet 3 is a sheet-shaped body and is integrally arc-shaped, the radians of the power magnet 3 and the radian of the connecting body 4 are the same, and the power magnet 3 is arranged on the circumferential direction of the connecting body 4, so that the position stability of the power magnet 3 on the connecting body 4 is ensured. Correspondingly, the inner wall of the gap 8 is also in arc connection, and the power magnet 3 is attached and fixed on the inner wall surface of the wall body of the gap 8 in a matching way.

A ferrule 7 is integrally formed at the inner opening of the body 1, the ferrule 7 extends toward the back of the body 1, the ferrule 7 is coaxially arranged with the coupling body 4, the axial dimension of the ferrule 7 is smaller than that of the body 1, and the ferrule 7 is stably matched with the bearing 5. The ferrule 7 is sleeved on the outer ring of the bearing 5, a space is arranged between the ferrule 7 and the power magnet 3 in the radial direction of the body 1, and the space is used for the extension of the driving magnet arranged on the inner end face of the end cover, so that a magnetic driving force is formed between the driving magnet and the power magnet 3 in the radial direction of the body 1, and the rotation driving of the end cover to the fan is realized.

To reduce the weight of the fan, the corresponding structure on the fan is relatively thin. The back of the body 1 is integrally formed with a plurality of reinforcing pieces 6, the reinforcing pieces 6 are arranged in the radial direction of the body 1, and two ends of each reinforcing piece 6 are respectively connected with the back of the body 1 and the connecting body 4, so that the strength of the connecting body 4 can be ensured.

Claims

1. The utility model provides a magnetic power fan in-wheel motor, including the annular body of circle, integrated into one piece has a plurality of blades that stretch out to the outside on the outer peripheral face of body, these blades equipartition in the circumference of body, the body cup joints and fixes on the bearing, a serial communication port, the outer peripheral face of body is the table surface, integrated into one piece has annular hookup body of circle on the back of body, the hookup body is located the radial outside of bearing, the hookup body sets up with the body is coaxial, be equipped with a plurality of power magnets on the hookup body, these power magnets are along the circumference interval equipartition of hookup body, in the footpath of hookup body, polarity between two adjacent power magnets is opposite.

2. The internal magneto-dynamic fan of the in-wheel motor according to claim 1, wherein a notch is provided on the coupling body for the dynamic magnet to be inserted therein, and a wall body of the notch protrudes radially outward of the coupling body.

3. The internal magnetic power fan of the hub motor as claimed in claim 2, wherein the power magnet is arc-shaped, the radians of the power magnet and the coupling body are the same, and the power magnet is arranged in the circumferential direction of the coupling body.

4. The internal magnetic power fan of the hub motor as claimed in claim 3, wherein the power magnet is attached and fixed to the inner wall surface of the wall body of the gap.

5. The internal magnetic power fan of the hub motor according to any one of claims 1 to 4, wherein a ferrule is integrally formed at the inner opening of the body, the ferrule extends toward the back surface of the body, the ferrule and the coupling body are coaxially arranged, the ferrule is sleeved on the bearing, and a space is formed between the ferrule and the power magnet in the radial direction of the body.

6. The internal magnetic power fan of the hub motor according to any one of claims 1 to 4, wherein a plurality of reinforcing pieces are integrally formed on the back surface of the body, the reinforcing pieces are arranged in the radial direction of the body, and two ends of each reinforcing piece are respectively connected with the back surface of the body and the connecting body.

7. The internal magnet power fan in an in-wheel motor according to any one of claims 1 to 4, wherein both ends of the blade intersect at both side edges of the outer peripheral surface of the body in the axial direction of the body.