CN216290556U

CN216290556U - Fan transmission device in motor of electric vehicle

Info

Publication number: CN216290556U
Application number: CN202122699698.9U
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: 2021-11-05
Filing date: 2021-11-05
Publication date: 2022-04-12
Anticipated expiration: 2031-11-05

Abstract

The utility model discloses a fan transmission device in an electric vehicle motor, belongs to the technical field of electric vehicle motors, and solves the problems that a heat exchange motor on an existing electric vehicle is relatively complex in structure and inconvenient to assemble and set. The motor comprises a stator and a rotor which are coaxially arranged together, a motor shaft is arranged at the axis position of the rotor, and the fan is sleeved on the motor shaft in a circumferential rotating manner. The transmission device comprises a plurality of starting magnets fixed on the rotor, the starting magnets are uniformly distributed on a circumference, and the polarities of the two adjacent starting magnets at the axial end parts of the rotor are opposite; the fan is provided with a plurality of driving magnets corresponding to the positions of the starting magnets, the driving magnets are uniformly distributed on a circumference, the polarities of the end parts of the two adjacent driving magnets in the axial direction of the rotor are opposite, and the number of the driving magnets is less than that of the starting magnets.

Description

Fan transmission device in motor of electric vehicle

Technical Field

The utility model relates to a motor applied to an electric vehicle, in particular to a transmission device for realizing the rotation of a fan arranged in the 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 at the electric motor car in-process of marcing, can receive the electricity and continuously give electric motor car output power, and stator and rotor in the motor can be continuous 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, 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.

The ideal design is to arrange a fan in the motor, rotate the fan in the motor, stir air in the motor to form air flow, so as to balance heat distribution in the motor, and ensure that the motor shell can exchange heat with the outside sufficiently, thereby avoiding the damage to the motor caused by the local accumulation of heat in the motor. And because the motor on the electric motor car sets up wheel hub position department usually, the space itself inside the motor is comparatively narrow and urge, and is not very suitable for setting up some parts that the structure is complicated relatively, otherwise can cause motor structure and size to produce great change to can bring great trouble for the assembly of electric motor car.

SUMMERY OF THE UTILITY MODEL

The technical problems to be solved by the utility model are as follows: provided is a fan transmission device in an electric vehicle motor, which has a simple structure and good compactness and can be well adapted to assembly in the motor.

In order to solve the technical problem, the technical scheme of the utility model is as follows: a fan transmission device in an electric vehicle motor is used for driving a fan arranged in the electric vehicle motor to rotate, the motor comprises a stator and a rotor which are coaxially arranged together, a motor shaft is arranged at the axis position of the rotor, and the fan is sleeved on the motor shaft in a circumferential rotating manner; the fan is provided with a plurality of driving magnets corresponding to the positions of the starting magnets, the driving magnets are uniformly distributed on a circumference, the polarities of the end parts of the two adjacent driving magnets in the axial direction of the rotor are opposite, and the number of the driving magnets is less than that of the starting magnets.

The motor during operation, the rotor can drive starting magnet circumferential motion, through starting magnet and drive magnet polarity the setting, and can utilize magnetic force to come to drive the rotation of fan, and because the difference of their quantity, when a small-angle of starting magnet circumferential motion, then can attract driving magnet through magnetic force, and make the fan carry out a relatively great angle rotation, the circumferential motion that starting magnet lasts, the fan rotates with higher speed to easily form the air current in motor inside.

Further, the number of the actuating magnets is an integral multiple of the number of the driving magnets. The integral multiple is set, so that stable corresponding relation can be formed between the magnets, magnetic loss is avoided, and the working efficiency of the fan is improved.

Furthermore, a circular starting ring is fixed at the end part of the rotor, and the starting magnet is arranged on the starting ring. The starting magnet is arranged on the starting ring, the structure inside the motor can be effectively simplified, the starting magnet is convenient to install, and the starting magnet is convenient to fix on a rotor of the motor.

Furthermore, a magnetic conduction plate is arranged between the driving magnet and the starting magnet, the magnetic conduction plate is made of iron, the magnetic conduction plate is sleeved on the motor shaft in a circumferential rotating mode, a plurality of magnetic conduction claws are arranged at the outer edge of the magnetic conduction plate, the positions of the magnetic conduction claws correspond to the positions of the driving magnet and the starting magnetic conduction iron, and the number of the magnetic conduction claws is between the number of the driving magnet and the number of the starting magnet. The magnetic conduction plate is arranged, and the magnetic conduction claws are formed on the magnetic conduction plate, so that the relation between the starting magnet and the driving magnet can be improved, the magnetic loss is reduced, and the driving efficiency of the fan is improved.

Furthermore, the surface of the magnetic conduction claw facing the starting magnet is provided with an embedded groove which penetrates through the magnetic conduction claw in the circumferential direction of the magnetic conduction plate. Through being provided with the caulking groove, can set up magnet in the caulking groove for the power transmission efficiency between start magnet and the drive magnet is high. In the case where no magnet is provided in the caulking groove, the presence of the caulking groove can also improve the magnetic convergence effect, thereby improving the magnetic conductance efficiency between the starter magnet and the drive magnet.

Furthermore, an accelerating ring is arranged between the driving magnets and the starting magnets, a plurality of accelerating magnets are arranged on the accelerating ring, the polarities of the end parts of the two adjacent accelerating magnets in the axial direction of the rotor are opposite, the positions of the accelerating magnets in the radial direction of the rotor correspond to the positions of the driving magnets and the starting magnets in the radial direction of the rotor, and the number of the accelerating magnets is between the number of the driving magnets and the number of the starting magnets. The accelerating ring is arranged, and the accelerating magnet is arranged on the accelerating ring, so that secondary speed acceleration can be realized between the motor rotor and the fan, and the rotating speed of the fan is improved. The motor is well suitable for the load forward of the electric vehicle or the requirement of the motor on heat dissipation under the condition of climbing. Even if the rotor rotates at a relatively slow speed, the fan can be effectively rotated.

Further, the number of the start magnets is an integral multiple of the number of the acceleration magnets, and the number of the acceleration magnets is an integral multiple of the number of the drive magnets. The number of the three magnets is limited, so that the transmission stability between the starting magnet and the driving magnet is good, and the transmission efficiency is high.

Further, a plate-shaped shaft coupling portion is provided on the radially inner side of the fan, the drive magnet is provided on the shaft coupling portion, and a wind pushing portion is provided on the outer periphery of the shaft coupling portion. The arrangement of the driving magnet is convenient, and the structure of the fan can well meet the installation requirement in the motor.

Compared with the prior art, the utility model has the following beneficial effects: the fan is arranged inside the motor, and the fan is convenient to drive through the arrangement of the transmission device, so that the fan rotates inside the motor, the heat inside the motor can be effectively balanced, and the motor can be protected. Through being provided with drive magnet and start magnet for can realize non-contact's drive between rotor and the fan, for the drive mechanism of mechanical type, the shared volume of this kind of non-contact's transmission is little, thereby can adapt to the inside space of motor well, conveniently sets up the fan in the motor is inside, and the size of motor need not make big change, thereby makes things convenient for the assembly between motor and the electric motor car. Through the drive magnet and the start magnet that set up different quantity to can accelerate for the rotation of fan well, even under the less condition of electric motor rotor's rotational speed, the fan also can produce effectual rotation, and this has adapted to the motor well and can produce the situation of a large amount of heats when the big torque power output of low-speed, thereby can provide fine guard action for the motor.

Drawings

Fig. 1 is an exploded view of the present transmission disposed within a hub.

Fig. 2 is a perspective view of the fan assembled with the starting ring and the magnetic conductive plate.

Fig. 3 is an exploded view of the structure shown in fig. 2.

Fig. 4 is an exploded view of the fan.

Fig. 5 is a structural view of a magnetic conductive plate according to an embodiment.

In the figure, 1, a hub; 2. a stator; 3. a motor shaft; 4. a rotor; 5. a start-up ring; 51. starting the magnet; 6. an acceleration ring; 61. an accelerating magnet; 7. a bearing; 8. a fan; 81. a drive magnet; 82. a wind pushing part; 83. a shaft coupling portion; 9. an end cap; 10. a magnetic conductive plate; 101. a magnetic conduction claw; 102. and (4) caulking grooves.

Detailed Description

Referring to the attached drawings of the specification, fig. 1 shows an exploded view of a hub 1 with a motor, the motor is arranged in the hub 1, a plurality of coils are fixed on the inner circumferential surface of the hub 1 to form a stator 2 of the motor, and a rotor 4 is coaxially and rotatably inserted in the stator 2. A motor shaft 3 is provided at an axial position of the rotor 4, a wheel type fan 8 is fitted to the motor shaft 3, and the fan 8 is rotatably fitted to an outer periphery of the motor shaft 3 via a bearing 7. The fan 8 is arranged outside one end part of the rotor 4 and is positioned in the axial size range of the hub 1, an end cover 9 is fixed at the outer opening part of the hub 1, and the end cover 9 is used for covering the outer opening part of the hub 1.

The transmission device of the fan 8 in the motor of the electric vehicle is arranged between the rotor 4 and the stator 2 and is used for driving the fan 8 to rotate. The transmission device comprises a plurality of starting magnets 51 fixed on the rotor 4, a sheet-shaped starting ring 5 is usually fixed at the end part of the rotor 4, and the starting ring 5 is made of non-magnetic conducting materials such as plastics, nylon, stainless steel or aluminum alloy. A starter ring 5 is fixed to the end of the rotor 4 by screws, the starter ring 5 being arranged perpendicularly to the motor shaft 3. A plurality of notches are formed in the actuating ring 5 in a circumferential direction, and one actuating magnet 51 is inserted into one notch. When the starting magnets 51 are provided, the polarities of the end portions of the adjacent two starting magnets 51 in the axial direction of the rotor 4 are opposite. The fan 8 structurally comprises a wind pushing portion 82 and a shaft coupling portion 83, wherein the wind pushing portion 82 is annular, the shaft coupling portion 83 is a sheet-shaped body and is arranged in a support structure mode, and the outer edge of the shaft coupling portion 83 is attached to the inner circumferential surface of the wind pushing portion 82. On the shaft coupling portion 83 of the fan 8, a plurality of driving magnets 81 are provided corresponding to the positions of the starting magnets 51, the driving magnets 81 are uniformly distributed on a circumference, and the polarities of the adjacent two driving magnets 81 at the axial end portions of the rotor 4 are arranged in opposite directions. The number of drive magnets 81 is less than the number of actuator magnets 51, and typically the number of actuator magnets 51 is four to five times the number of drive magnets 81, so that approximately four to five times the speed of the fan 8 relative to the speed of the actuator ring 5 is increased. The fan 8 is also able to produce an effective rotation when the electric vehicle is subjected to heavy and slow travel, while an effective heat-balanced rotation is carried out inside the motor.

In order to drive the fan 8, a magnetic conductive plate 10 is disposed between the driving magnet 81 and the starting magnet 51, the magnetic conductive plate 10 is made of iron, and the magnetic conductive plate 10 is also circumferentially rotatably sleeved on the motor shaft 3 through the bearing 7. The outer edge of the magnetic conduction plate 10 is provided with a plurality of magnetic conduction claws 101, the magnetic conduction claws 101 correspond to the positions of the driving magnet 81 and the starting magnet 51, gaps are formed between the magnetic conduction claws 101 and the starting magnet 51 and between the magnetic conduction claws 101 and the starting magnet 81, and the number of the magnetic conduction claws 101 is between that of the driving magnet 81 and that of the starting magnet 51, so that two-stage acceleration is formed between the starting ring 5 and the fan 8, the fan 8 can be well adapted to the driving of the starting ring 5, and the fan 8 moves smoothly in the working process. The magnetic conductive claw 101 is provided with a caulking groove 102 on a surface facing the start magnet 51, and the caulking groove 102 penetrates the magnetic conductive claw 101 in the circumferential direction of the magnetic conductive plate 10. Magnets may be provided in the slots 102, which are arranged at the axial ends of the rotor 4 with opposite polarities between adjacent magnets when the magnets are mounted.

As another embodiment, an accelerating ring 6 may be disposed between the driving magnet 81 and the actuating magnet 51, and the accelerating ring 6 may be made of plastic or stainless steel. A plurality of accelerating magnets 61 are provided on the accelerating ring 6, and the polarities of the adjacent two accelerating magnets 61 at the axial end portions of the rotor 4 are opposite. The position of the accelerating magnet 61 in the radial direction of the rotor 4 corresponds to the position of both the driving magnet 81 and the starting magnet 51 in the radial direction of the rotor 4, and the starting magnet 51, the accelerating magnet 61, and the driving magnet 81 have gaps therebetween in the axial direction of the rotor 4, and they function in a non-contact manner. The number of accelerating magnets 61 is between the number of driving magnets 81 and the number of actuating magnets 51, wherein the number of actuating magnets 51 is an integer multiple of the number of accelerating magnets 61, the number of accelerating magnets 61 is an integer multiple of the number of driving magnets 81, and the relationship therebetween is usually two times, that is, the number of actuating magnets 51 is twice the number of accelerating magnets 61; the number of accelerating magnets 61 is twice the number of driving magnets 81, and theoretically the fan 8 will achieve nearly four times the acceleration as the starter ring 5 follows the rotation of the rotor 4.

Claims

1. A fan transmission device in an electric vehicle motor is used for driving a fan arranged in the electric vehicle motor to rotate, the motor comprises a stator and a rotor which are coaxially arranged together, a motor shaft is arranged at the axis position of the rotor, and the fan is sleeved on the motor shaft in a circumferential rotating manner; the fan is provided with a plurality of driving magnets corresponding to the positions of the starting magnets, the driving magnets are uniformly distributed on a circumference, the polarities of the end parts of the two adjacent driving magnets in the axial direction of the rotor are opposite, and the number of the driving magnets is less than that of the starting magnets.

2. The fan drive in an electric vehicle motor of claim 1, wherein the number of the start magnets is an integer multiple of the number of the drive magnets.

3. The fan drive unit in an electric vehicle motor as claimed in claim 1, wherein a ring-shaped starter ring is fixed to an end of the rotor, and the starter magnet is provided on the starter ring.

4. The fan transmission device in the electric vehicle motor according to claim 1, 2 or 3, wherein a magnetic conductive plate is provided between the driving magnet and the starting magnet, the magnetic conductive plate is made of iron, the magnetic conductive plate is circumferentially and rotatably sleeved on the motor shaft, a plurality of magnetic conductive claws are provided at an outer edge of the magnetic conductive plate, the magnetic conductive claws correspond to the positions of the driving magnet and the starting magnet, and the number of the magnetic conductive claws is between the number of the driving magnet and the number of the starting magnet.

5. The fan drive unit in the electric vehicle motor according to claim 4, wherein a caulking groove is provided on a surface of the magnetic conductive claw facing the actuating magnet, the caulking groove penetrating the magnetic conductive claw in a circumferential direction of the magnetic conductive plate.

6. The fan drive unit in the electric motor vehicle according to claim 1, 2 or 3, wherein an accelerating ring is provided between the driving magnets and the starting magnets, the accelerating ring is provided with a plurality of accelerating magnets, the polarities of the end portions of two adjacent accelerating magnets in the axial direction of the rotor are opposite, the positions of the accelerating magnets in the radial direction of the rotor correspond to the positions of both the driving magnets and the starting magnets in the radial direction of the rotor, and the number of the accelerating magnets is between the numbers of the driving magnets and the starting magnets.

7. The fan drive in an electric vehicle motor of claim 6, wherein the number of the start magnets is an integer multiple of the number of the accelerating magnets, and the number of the accelerating magnets is an integer multiple of the number of the driving magnets.

8. The fan transmission device in an electric vehicle motor according to claim 1, 2 or 3, wherein a plate-like shaft coupling portion is provided radially inside the fan, the drive magnet is provided on the shaft coupling portion, and a wind pushing portion is provided on an outer periphery of the shaft coupling portion.