CN216699731U

CN216699731U - Internal magnetic power driving device of hub motor

Info

Publication number: CN216699731U
Application number: CN202220002860.9U
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 a magnetic power driving device in a hub motor, belongs to the technical field of electric vehicle motors, and solves the problems that a motor with a heat dissipation function on the existing electric vehicle is relatively complex in structure and relatively large in axial size. The magnetic power driving device is characterized in that the magnetic power driving device comprises a driving frame fixed on the inner end face of the end cover, the motor shaft penetrates through the driving frame, a plurality of driving magnets are arranged on the driving frame, the driving magnets are uniformly distributed on the driving frame along the circumferential direction of the motor shaft, a power part for receiving the driving force of the driving magnets is arranged on a driven part, the power part and the driving magnets are overlapped in the axial direction of the circumference, and the polarities of the two adjacent driving magnets in the radial direction of the circumference are opposite.

Description

Internal magnetic power driving device of hub motor

Technical Field

The present invention relates to a hub motor, and more particularly to a driving device for magnetically driving a driven member applied to a 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 receive the electricity and last for electric motor car output power, and 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 accumulation, 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 106160340A) discloses a cooling structure of a permanent magnet motor, in particular to a totally-enclosed forced ventilation cooling structure of the permanent magnet motor. The utility model solves the problems of poor cooling performance and limited application range of the existing permanent magnet motor. A totally-enclosed forced ventilation cooling structure of a permanent magnet motor comprises a base, a front end cover, a rear end cover, a front bearing, a rear bearing, a stator structure and a rotor structure; the radial air inlet hole, the third ventilation gap, the axial ventilation hole, the first ventilation gap and the radial air outlet hole form a main cooling air path structure; the axial forward air outlet, the second ventilation gap and the axial forward air outlet form a front auxiliary cooling air path structure; the axial rear air inlet hole, the fourth air outlet gap and the axial rear air outlet hole jointly form a rear auxiliary cooling air path structure; the front end surface of the rotor core is fixed with a front fan blade; and a rear fan blade is fixed on the rear end surface of the rotor core.

In order to adapt to the heat dissipation of the motor, the structure of the permanent magnet motor of the electric vehicle is relatively complex and inconvenient to arrange, and the size of the hub motor in the axial direction is relatively large.

SUMMERY OF THE UTILITY MODEL

The technical problems to be solved by the utility model are as follows: the magnetic power driving device in the hub motor is convenient to arrange in the hub motor, and the size of the hub motor in the axial direction is relatively small.

In order to solve the technical problem, the technical scheme of the utility model is as follows: the magnetic power driving device is characterized in that the magnetic power driving device comprises a driving frame fixed on the inner end face of the end cover, the motor shaft penetrates through the driving frame, a plurality of driving magnets are arranged on the driving frame, the driving magnets are uniformly distributed on the driving frame along the circumferential direction of the motor shaft, a power part for receiving the driving force of the driving magnets is arranged on a driven part, the power part and the driving magnets are overlapped in the axial direction of the circumference, and the polarities of the two adjacent driving magnets in the radial direction of the circumference are opposite.

The driven member is usually a fan rotatably sleeved on the motor shaft for dissipating heat inside the hub motor. The driven piece is provided with a power magnet, and the driven piece can be driven to rotate circumferentially when the driving frame rotates through the magnetic action between the driving magnet and the power magnet. In the related wheel hub motor, the motor shaft is connected on the bottom fork of the electric vehicle, and when the electric vehicle works, the motor shaft can not rotate, and the end cover rotates along with the wheel hub, so that the driving frame is driven to work.

Furthermore, a cylindrical connecting ring is arranged on the driving frame, a motor shaft penetrates through the connecting ring, and the driving magnet is arranged on the connecting ring.

Furthermore, a cylindrical shield is integrally formed at the outer edge of the driving frame, the shield and the coupling ring are coaxially arranged, and the shield and the coupling ring are positioned at the same side of the driving frame.

Furthermore, a plurality of through holes are arranged at the intersection position of the blocking cover and the driving frame, and the through holes are uniformly distributed along the outer edge of the driving frame.

Furthermore, a connecting port is arranged on the driving frame, the connecting port is positioned on the radial inner side of the connecting ring, a protruding connecting head is arranged on the inner end face of the end cover, and the connecting head is connected in the connecting port in an inserting mode.

Furthermore, a plurality of protruding convex bodies are integrally formed at the outer edge of the outer end of the coupling head, clamping bodies with the same number as the convex bodies are integrally formed at the inner edge of the coupling port, the clamping ring is sleeved on the coupling head, clamping jaws with the same number as the clamping bodies are integrally formed at the inner edge of the clamping ring, the clamping jaws are in a strip shape and are arranged along the circumferential direction of the inner edge of the clamping ring, the coupling ends of the clamping jaws are connected to the clamping ring, the outer ends of the clamping jaws are in a cantilever shape, the convex bodies are pressed on the coupling ends of the clamping jaws, and the outer ends of the clamping jaws are elastically pressed on the clamping bodies on the driving frame.

Further, in the axial direction of the clamping ring, the outer ends of the clamping jaws are curved.

Compared with the prior art, the utility model has the following beneficial effects: the driving device is arranged in the hub motor, so that a fan can be arranged in the motor, the fan can rotate in the motor, the air flow inside the motor can be stirred, the heat is prevented from accumulating inside the motor, the heat inside the motor is balanced, the heat transfer efficiency of the motor shell can be effectively improved, and the working stability of the motor is ensured. The driving frame is provided with a plurality of driving magnets, the fan can be provided with a relatively small number of power magnets, and a magnetic driving force is formed between the driving magnets and the power magnets, so that the driving movement of the fan can be effectively realized. Through the difference of two kinds of magnet quantity, and can realize the rotation with higher speed of fan in the wheel hub motor, the electric motor car is at the during operation, can make the fan can produce effective stirring to the inside air of wheel hub motor, and the work efficiency of fan is high. The driven piece and the driving magnet are overlapped in the axial direction, and the magnetic acting force between the driving magnet and the power magnet is located in the radial direction, so that the structure inside the hub motor is good in compactness, and the arrangement of the heat dissipation device cannot cause the axial size of the hub motor to be overlarge.

Drawings

Fig. 1 is a perspective view of the magnetic power drive device.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a perspective view of the driving frame.

In the figure, 1, end cap; 2. a flow deflector; 3. a driving frame; 4. a drive magnet; 5. a coupling head; 6. a convex body; 7. a coupling ring; 8. embedding a port; 9. a shield; 10. a collar; 11. a claw; 12. a card body; 13. a tab; 14. through holes; 15. a coupling port.

Detailed Description

The magnetic power driving device is arranged in a hub motor and is generally used for driving a fan arranged in the hub motor to rotate so as to achieve the purpose of dissipating heat in the hub motor by combining with the attached drawings of the specification.

The structure of the hub motor comprises a ring-shaped hub, end covers 1 are respectively arranged on two opposite sides of the hub, a motor shaft penetrates through the two end covers 1, and the two end covers 1 are respectively rotatably arranged on the motor shaft through bearings. When the motor works, the hub drives the end cover 1 to rotate circumferentially on the motor shaft. The end cover 1 is in a cover shape, a plurality of flow deflectors 2 are integrally formed on the inner end face of the end cover 1, the flow deflectors 2 are arc-shaped, and the flow deflectors 2 are uniformly distributed in the circumferential direction of the end cover 1. The magnetic power driving device comprises a driving frame 3 fixed on the inner end surface of an end cover 1, wherein the driving frame 3 is disc-shaped, and a motor shaft penetrates through the driving frame 3. In order to reduce weight and facilitate wind passing, the driving frame 3 is fully distributed with hollow structures.

The driving frame 3 is provided with a plurality of driving magnets 4, the driving magnets 4 are uniformly distributed on the driving frame 3 along the circumferential direction of the motor shaft, the driven piece is provided with a power part for receiving the driving force of the driving magnets 4, the power part is uniformly distributed with a plurality of power magnets, and the number of the power magnets is less than that of the driving magnets 4. In the axial direction of the circumference, the power magnet on the power portion and the drive magnet 4 have an overlap, and normally, the drive magnet 4 and the power magnet completely overlap in the axial direction of the circumference. It is necessary for the arrangement of the drive magnets 4 that the polarities of the adjacent two drive magnets 4 are opposite in the radial direction of the circumference. Accordingly, the polarity arrangement of the power magnets on the power part of the driven member also has this requirement.

In order to facilitate the arrangement of the driving magnet 4, a cylindrical coupling ring 7 is integrally formed on the driving frame 3, and a motor shaft penetrates through the coupling ring 7. The wall body of the connecting ring 7 is provided with embedding openings 8 the number of which is consistent with that of the driving magnets 4, the driving magnets 4 are arc-shaped sheets, and one driving magnet 4 is embedded in one embedding opening 8. The coupling ring 7 also causes the drive magnet 4 to project outwardly of the drive frame 3 to facilitate a driving engagement between the power section on the driven member and the drive magnet 4.

A cylindrical shield 9 is integrally formed at the outer edge of the driving frame 3, the shield 9 and the coupling ring 7 are coaxially arranged, and the shield 9 and the coupling ring 7 are positioned at the same side of the driving frame 3. The driven member can be accommodated in the space between the shield 9 and the coupling ring 7, which ensures the operational stability of the driven member. Due to the arrangement of the blocking cover 9, wind generated by the fan can be guided, and the wind power in the working process of the fan is convenient to guarantee. A plurality of through holes 14 are arranged at the intersection position of the shield cover 9 and the driving frame 3, the through holes 14 are waist-shaped, and the through holes 14 are uniformly distributed along the outer edge of the driving frame 3. The through holes 14 are also suitable for the condition that the driven part is a fan, and the weight of the driving frame 3 can be effectively reduced by arranging the through holes 14.

In order to facilitate the connection and fixation between the driving frame 3 and the end cover 1, a connecting port 15 is arranged on the driving frame 3, and the connecting port 15 is positioned at the radial inner side of the connecting ring 7; the inner end face of the end cover 1 is provided with a protruding coupling head 5, and the coupling head 5 is connected in the coupling port 15 in an inserting way. Several protruding convex bodies 6 are integrally formed at the outer edge of the outer end of the coupling head 5, the same number of card bodies 12 as the convex bodies 6 are integrally formed at the inner edge of the coupling port 15, and the card bodies 12 are provided with convex pieces 13. The connection and fixation between the driving frame 3 and the end cover 1 are generally realized through a clamping ring 10, the clamping jaws 11 with the number consistent with that of the clamping bodies 12 are integrally formed at the inner edge of the clamping ring 10, the clamping jaws 11 are strip-shaped, the clamping jaws 11 are arranged along the circumferential direction of the inner edge of the clamping ring 10, the connection ends of the clamping jaws 11 are connected to the clamping ring 10, and the outer ends of the clamping jaws 11 are cantilever-shaped.

The coupling port 15 on the driving frame 3 is sleeved on the coupling head 5, after the lug 13 on the clamping body 12 is abutted against the convex body 6, the clamping ring 10 is sleeved on the coupling head 5 from the outer side, the clamping ring 10 is rotated towards the outer end direction of the clamping jaw 11, and due to the limiting effect of the lug 13 and the convex body 6, the driving frame 3 cannot rotate along with the limiting effect. When the clamping ring 10 is rotated to the right, the convex bodies 6 on the coupling head 5 are pressed on the coupling ends of the claws 11, and the outer ends of the claws 11 are elastically pressed on the clamping bodies 12 on the driving frame 3, so that the driving frame 3 can be stably coupled on the inner end surface of the end cover 1. In the axial direction of the clamping ring 10, the outer ends of the claws 11 are curved, which facilitates the matching between the claws 11 and the card body 12 on one hand, and on the other hand, when the claws 11 are pressed against the card body 12, the pressing stability between the claws 11 and the card body 12 is good, which facilitates the stable connection of the driving frame 3 on the end cover 1.

Claims

1. The magnetic power driving device is characterized in that the magnetic power driving device comprises a driving frame fixed on the inner end face of the end cover, the motor shaft penetrates through the driving frame, a plurality of driving magnets are arranged on the driving frame, the driving magnets are uniformly distributed on the driving frame along the circumferential direction of the motor shaft, a power part for receiving the driving force of the driving magnets is arranged on a driven part, the power part and the driving magnets are overlapped in the axial direction of the circumference, and the polarities of the two adjacent driving magnets in the radial direction of the circumference are opposite.

2. The internal magnetic power driving device of a hub motor according to claim 1, wherein the driving frame is provided with a cylindrical coupling ring, a motor shaft penetrates through the coupling ring, and the driving magnet is arranged on the coupling ring.

3. The internal magnetic power driving device of the in-wheel motor according to claim 2, wherein a cylindrical shield is integrally formed at the outer edge of the driving frame, the shield and the coupling ring are coaxially arranged, and the shield and the coupling ring are positioned at the same side of the driving frame.

4. The internal magnetic power driving device of a hub motor according to claim 3, wherein a plurality of through holes are formed at the intersection of the shield and the driving frame, and the through holes are uniformly distributed along the outer edge of the driving frame.

5. The internal magnetic power driving device of the hub motor according to claim 2, 3 or 4, wherein the driving frame is provided with a coupling port, the coupling port is positioned at the radial inner side of the coupling ring, the inner end face of the end cover is provided with a protruding coupling head, and the coupling head is connected in the coupling port in an inserting manner.

6. The internal magnetic power driving device of the hub motor according to claim 5, wherein a plurality of protruding convex bodies are integrally formed at the outer edge of the outer end of the coupling head, clamping bodies with the same number as the convex bodies are integrally formed at the inner edge of the coupling port, the clamping ring is sleeved on the coupling head, clamping jaws with the same number as the clamping bodies are integrally formed at the inner edge of the clamping ring, the clamping jaws are strip-shaped and are arranged along the circumferential direction of the inner edge of the clamping ring, the coupling ends of the clamping jaws are connected to the clamping ring, the outer ends of the clamping jaws are cantilever-shaped, the convex bodies are pressed on the coupling ends of the clamping jaws, and the outer ends of the clamping jaws are elastically pressed on the clamping bodies on the driving frame.

7. The internal magnet power driving device of a hub motor according to claim 6, wherein the outer ends of the jaws are curved in the axial direction of the collar.