CN215897393U

CN215897393U - Electric vehicle motor

Info

Publication number: CN215897393U
Application number: CN202121221763.0U
Authority: CN
Inventors: 沈词书; 张中华; 代禹平; 郑巍; 毛崇剑; 梁仁希; 陆建华
Original assignee: Lima Vehicle Industry Group Co ltd
Current assignee: Lima Vehicle Industry Group Co ltd
Priority date: 2021-06-02
Filing date: 2021-06-02
Publication date: 2022-02-22
Anticipated expiration: 2031-06-02

Abstract

The utility model discloses an electric vehicle motor, which belongs to the technical field of electric vehicle motors and solves the problems that an existing high-efficiency heat exchange motor on an electric vehicle is relatively complex in structure and inconvenient to assemble and set, and the technical scheme is as follows: the motor of the electric vehicle comprises a stator and a rotor, wherein the stator is arranged on a support, the support is circumferentially and fixedly sleeved on a motor shaft, the rotor is circumferentially and rotatably sleeved on the periphery of the stator, two end covers are respectively arranged at two opposite ends of the rotor, the motor shaft penetrates through the two end covers in a clearance manner, and the end covers are in a cover shape and are provided with end parts and side edge parts which are connected into a whole.

Description

Electric vehicle motor

Technical Field

The utility model relates to a motor applied to an electric vehicle.

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 continue to 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 make the motor can produce a large amount of heats after working a period, these heats can be accumulated inside the motor and can not be derived easily sometimes, if the heat obtains not abundant derivation, 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 form a rear auxiliary cooling air path structure together; 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. The utility model is suitable for the permanent magnet motor.

In order to adapt to heat dissipation of the motor, the structure of the permanent magnet motor of the electric vehicle is relatively complex, the motor needs to be greatly improved, the mechanical strength of the motor is damaged, and the motor is inconvenient to assemble and set.

SUMMERY OF THE UTILITY MODEL

The technical problems to be solved by the utility model are as follows: the motor of the electric vehicle is relatively simple in structure and convenient to assemble and set.

In order to solve the technical problem, the technical scheme of the utility model is as follows: the motor of the electric vehicle comprises a stator and a rotor, wherein the stator is arranged on a support, the support is circumferentially and fixedly sleeved on a motor shaft, the rotor is circumferentially and rotatably sleeved on the periphery of the stator, two end covers are respectively arranged at two opposite ends of the rotor, the motor shaft penetrates through the two end covers in a clearance manner, and the end covers are in a cover shape and are provided with end parts and side edge parts which are connected into a whole.

The spoiler is usually integrally formed on the inner end surface of the end cover, the setting height of the spoiler on the inner end surface of the end cover is related to the axial size of the end cover and the stator, and a gap is formed between the spoiler and the stator after the end cover is assembled in place. When the motor works, the end cover drives the spoiler to rotate together, the spoiler can generate a turbulence effect on the inside of the motor, so that the gas inside the motor flows, and the heat exchange effect with the outside is improved.

Further, the spoilers are arc-shaped, and all the spoilers are arc-shaped and bent in the same direction in the circumferential direction of the end cover. The action of the arc-shaped spoiler on the fluid is relatively gentle, and the stable air flow generated in the motor is facilitated.

Further, the outer end of the spoiler is located on the downstream side of the inner end thereof in the rotational direction of the end cover. This facilitates pushing the gas at the motor shaft radially outward to achieve efficient heat exchange between the gas flow and the end cap.

Further, a cylindrical coupling part is integrally formed at a center position of the end cover, an outer end portion of the spoiler extends to a side edge portion position of the end cover, and a space is provided between the inner end portion of the spoiler and the coupling part. This makes the setting intensity of spoiler on the end cover high, can reduce the thickness that sets up of spoiler, and the weight of motor can not excessively be increased in the setting of spoiler.

Further, the outer end of the spoiler inclines towards the downstream side, the inner end of the spoiler is approximately vertical to the inner circumferential surface of the end cover, and the inner end and the outer end of the spoiler are in smooth curved surface transition. The space form of the spoiler is convenient for pushing the air flow inside the motor, is convenient for generating smooth air flow inside the motor, and can effectively improve the heat dissipation effect inside the motor.

Further, a plurality of recesses are formed on the outer end face of the end cap. Due to the arrangement of the recesses, on one hand, disturbance can be generated on the air flow outside the motor, and the heat exchange efficiency of the motor is improved; on the other hand, the motor is also attractive in appearance.

Further, the bottom wall of the recess protrudes from the inner end surface of the end cap. This eliminates the need for the wall of the end cap to be made very thick, and the strength of the end cap can be ensured.

Compared with the prior art, the utility model has the following beneficial effects: through the inside setting at the motor the spoiler, the spoiler can follow the end cover and rotate together at the motor during operation, the spoiler of rotation in-process can produce the disturbance to the inside air current of motor, the air current can be inside and the end cover between have spaced part department heat conduction to the end cover department inside the motor, realize and the end cover between the heat exchange, thereby can make the inside temperature difference everywhere of motor little, can effectively avoid the heat of the inside somewhere of motor to gather, the operational environment of motor has been improved, the working property of motor has been improved, the life of motor has been guaranteed. Through setting up the spoiler, can provide good guard action for the motor, simple structure, convenient assembly sets up.

Drawings

Fig. 1 is an assembly structure view of the motor of the electric vehicle.

Fig. 2 is a sectional view of the steps of the motor of the present electric vehicle after being assembled.

Fig. 3 is a structural view at the inner end face of the motor cover of the present electric vehicle.

Fig. 4 is a structural view at the outer end face of the motor cover of the present electric vehicle.

In the figure, 1, a motor shaft; 2. an end cap; 21. a coupling portion; 22. recessing; 3. a hub; 4. a rotor; 5. a stator; 6. a support; 7. a ball bearing; 8. a spoiler.

Detailed Description

The motor of the electric vehicle is applied to the electric vehicle, particularly is arranged at the axis position of a rear wheel hub 3 of the electric vehicle and is used for providing forward power for the electric vehicle. The structure of the motor comprises a stator 5 and a rotor 4, wherein the stator 5 is arranged on the outer peripheral surface of a support 6, the support 6 is fixedly sleeved on a motor shaft 1 in the circumferential direction, the rotor 4 is sleeved on the outer periphery of the stator 5 in the circumferential direction, a magnetic cylinder and a wire winding are arranged between the stator 5 and the rotor 4, and the rotor 4 rotates relative to the stator 5 in the circumferential direction after being electrified.

Two end covers 2 are respectively arranged at two opposite ends of the rotor 4, and a motor shaft 1 penetrates through the two end covers 2 with a gap. The end covers 2 are in a cover shape and are provided with end parts and side edge parts which are connected into a whole, and the two end covers 2 are fastened and fixed on two opposite sides of the rotor 4. A plurality of protruding spoilers 8 are integrally formed on the inner end surface of the end cover 2, the spoilers 8 extend out in the direction of the bracket 6, and a space is formed between the spoilers 8 and the bracket 6. The outer end of the spoiler 8 is radially outside the inner end thereof in the radial direction of the end cover 2, i.e. the spoiler 8 has a certain dimension extending in the radial direction of the end cover 2. In fig. 3, these spoilers 8 are shown spaced apart circumferentially of the inner end surface of the end cap 2.

In fig. 3, the spoilers 8 are shown as being curved, all of the spoilers 8 being curved in the same direction in the circumferential direction of the end cap 2. When the electric vehicle is in operation, the end cap 2 is rotated in the direction of the arrow in fig. 3. The outer end of the spoiler 8 is located on the downstream side of the inner end thereof in the rotational direction of the end cover 2. The outer end of the spoiler 8 inclines towards the downstream side, the inner end of the spoiler 8 is approximately vertical to the inner circumferential surface of the end cover 2, and the inner end and the outer end of the spoiler 8 are in smooth curved surface transition.

In the figure, a cylindrical coupling part 21 is integrally formed at the position of the center of the end cover 2, a ball bearing 7 is arranged in the coupling part 21, the motor shaft 1 is inserted in the ball bearing 7, and the ball bearing 7 provides a rotating supporting function for the motor shaft 1. The outer end portion of the spoiler 8 extends to the position of the side edge portion of the end cover 2 with a space between the inner end portion of the spoiler 8 and the coupling portion 21.

The arrow in fig. 2 indicates the flow direction of the airflow generated inside the motor after the spoiler 8 moves along with the end cover 2 when the motor is in operation. Under 8's disturbance, the inside circulating air current that can produce of motor, have circulating air current's participation, the inside heat exchange efficiency of motor is high, is difficult for causing local thermal accumulation in the motor inside, can provide good guard action for the motor.

Referring to fig. 3 and 4, a plurality of recesses 22 are formed on the outer end surface of the end cap 2, and the recesses 22 occupy most of the area of the end surface of the end cap 2. In order to ensure the strength of the bottom wall of the recess 22, and the end cap 2 need not be made thick, the bottom wall of the recess 22 protrudes from the inner end face of the end cap 2.

Claims

1. The motor of the electric vehicle comprises a stator and a rotor, wherein the stator is arranged on a support, the support is circumferentially and fixedly sleeved on a motor shaft, the rotor is circumferentially and rotatably sleeved on the periphery of the stator, two end covers are respectively arranged at two opposite ends of the rotor, the motor shaft penetrates through the two end covers in a clearance manner, and the end covers are in a cover shape and are provided with end parts and side edge parts which are connected into a whole.

2. The electric motor of claim 1, wherein the spoilers are curved, and all of the spoilers are curved in the same direction in the circumferential direction of the end cover.

3. The electric motor for vehicle according to claim 1 or 2, wherein the outer end of the spoiler is located on the downstream side of the inner end thereof in the rotational direction of the end cover.

4. The electric vehicle motor according to claim 3, wherein a cylindrical coupling portion is integrally formed at a center position of the end cover, an outer end portion of the spoiler extends to a side edge position of the end cover, and an inner end portion of the spoiler is spaced from the coupling portion.

5. The electric vehicle motor of claim 3, wherein the outer end of the spoiler is inclined toward the downstream side, the inner end of the spoiler is approximately perpendicular to the inner circumferential surface of the end cap, and the inner end and the outer end of the spoiler are smoothly curved in transition.

6. The electric vehicle motor according to claim 1 or 2, wherein a plurality of recesses are formed on an outer end surface of the end cap.

7. The electric vehicle motor of claim 6, wherein the recessed bottom wall protrudes beyond an inner end surface of the end cap.