CN213043558U

CN213043558U - In-wheel motor and electric motor car

Info

Publication number: CN213043558U
Application number: CN202022373777.6U
Authority: CN
Inventors: 赵泽鹏; 冯超
Original assignee: Beijing Cuifeng Capital Investment Co Ltd
Current assignee: Shanxi Donghui New Energy Automobile Research Institute Co ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2021-04-23
Anticipated expiration: 2030-10-22

Abstract

The application provides a hub motor and an electric vehicle, which comprise a motor main shaft; the first rotor shell is sleeved outside the motor spindle; the second rotor shell is sleeved outside the motor spindle and connected with the first rotor shell to jointly define a containing cavity; and the central frame is sleeved outside the motor spindle, and part of the central frame is positioned outside the containing cavity. The hub motor has high heat dissipation efficiency, good performance and stable and reliable operation.

Description

In-wheel motor and electric motor car

Technical Field

The utility model relates to a motor manufacturing field particularly, relates to an in-wheel motor and electric motor car.

Background

The hub motor is widely applied to an electric automobile driving system, and the electric energy utilization rate and the system complexity can be greatly improved due to the reduction of transmission links. The hub motor is usually an external rotor motor, and the stator part is located inside the housing of the hub motor and is usually fixed on the main shaft of the hub motor based on a center frame. In order to effectively improve the power density of the hub motor, the hub motor can be cooled by adopting a natural air cooling mode. The main heating part of the hub motor is a stator coil of the hub motor, and heat is conducted to the center frame through the stator core and then is radiated through a spindle or an outer rotor of the hub motor. At present, the air cooling technical scheme is adopted, the heat dissipation power is limited, and the air cooling technical scheme is difficult to be applied to a hub motor with higher power.

The inventor researches and discovers that the existing hub motor has the following defects:

the heat dissipation effect is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an in-wheel motor and electric motor car, its radiating effect that can improve in-wheel motor.

The embodiment of the utility model is realized like this:

in a first aspect, an embodiment of the present invention provides an in-wheel motor, including:

a motor spindle;

the first rotor shell is sleeved outside the motor spindle;

the second rotor shell is sleeved outside the motor spindle and connected with the first rotor shell, and a containing cavity is defined by the second rotor shell and the first rotor shell;

and the central frame is used for mounting the stator assembly, the central frame is sleeved outside the motor spindle, and part of the central frame is positioned outside the accommodating cavity.

In an alternative embodiment, a recess is provided in the part of the steady that is outside the receiving chamber.

In an alternative embodiment, the portion of the center frame located outside the receiving chamber has an outer end surface in the extending direction of the motor spindle, and the groove is opened on the outer end surface.

In an alternative embodiment, the recess is an annular groove disposed around the motor shaft.

In an alternative embodiment, the portion of the steady outside the receiving chamber extends through the first rotor housing; when the in-wheel motor is assembled into the wheel, the first rotor housing is adjacent to the inner side of the wheel.

In an alternative embodiment, the first rotor housing is detachably connected to the second rotor housing.

In an alternative embodiment, the portion of the steady within the receiving chamber is provided with a mounting portion for mounting the stator core.

In an alternative embodiment, the mounting portion is a mounting slot.

In an alternative embodiment, the mounting slot comprises a slot bottom wall and two slot side walls connected to opposite sides of the slot bottom wall, both the slot bottom wall and the two slot side walls being adapted to be in contact with the stator core.

In a second aspect, an embodiment of the present invention provides an electric vehicle, which includes:

the in-wheel motor of any preceding embodiment.

The embodiment of the utility model provides a beneficial effect is:

in summary, the embodiment provides an in-wheel motor, including motor spindle and all establish first rotor housing, second rotor housing and the centre frame outside motor spindle, the part of centre frame is located accomodate the chamber, in other words, the centre frame includes continuous first portion and second portion, and first portion is located and accomodates the chamber by first rotor housing and the common limit of second rotor housing, and the second portion is located and accomodates the chamber. During the assembly, stator winding is connected with the centre frame, when wheel hub motor operation in-process, the heat transfer that stator coil of stator winding produced to stator core, then transmit to the centre frame through stator core, because the second part of centre frame is located accomodates the chamber outdoor, the heat directly conducts to the external environment through the second part, the second part of centre frame directly carries out the heat exchange with the air of external environment, improve wheel hub motor's radiating efficiency greatly, wheel hub motor radiating effect is good.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of an in-wheel motor according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a deformation structure of an in-wheel motor according to an embodiment of the present invention.

Icon:

100-a motor spindle; 200-a first rotor housing; 300-a second rotor housing; 400-a central frame; 410-a first portion; 411-a mounting portion; 420-a second portion; 421-outer end face; 422-groove; 500-receiving chamber.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-2, the present embodiment provides an in-wheel motor, which has high heat dissipation efficiency, stable performance, safe and reliable operation, and long service life.

In this embodiment, the in-wheel motor includes:

a motor spindle 100;

the first rotor shell 200, the first rotor shell 200 is sleeved outside the motor spindle 100;

a second rotor housing 300, the second rotor housing 300 is sleeved outside the motor spindle 100, the second rotor housing 300 is connected with the first rotor housing 200, and the two define a containing chamber 500;

and a center frame 400, wherein the center frame 400 is sleeved outside the motor spindle 100, and a part of the center frame 400 is located outside the accommodating chamber 500.

It should be noted that, when the in-wheel motor is assembled on a wheel, the first rotor housing 200 is located on the inner side of the wheel, and correspondingly, the second rotor housing 300 is located on the outer side of the wheel, in other embodiments, the first rotor housing 200 may be referred to as a rotor cover, and the second rotor housing 300 may be referred to as a rotor shell.

In the hub motor provided by the embodiment, the first rotor housing 200 and the second rotor housing 300 define a containing chamber 500 for containing the stator set and the rotor set, and the containing chamber 500 is a closed chamber, so that the waterproof effect is good. A portion of the center frame 400 is located outside the receiving chamber 500, in other words, the center frame 400 includes a first portion 410 and a second portion 420 connected, the first portion 410 being located inside the receiving chamber 500, the second portion 420 being located outside the receiving chamber 500. In-wheel motor operation process, the main heat of in-wheel motor derives from the stator coil of stator group, the heat transfer that the stator coil produced is to the stator core of stator group, then transmit to centre frame 400 through stator core, because the second part 420 of centre frame 400 is located outside accomodating cavity 500, the heat is directly in the conduction of second part 420 to the external environment, the second part 420 of centre frame 400 is direct to carry out the heat exchange with the air of external environment, in-wheel motor's radiating efficiency is greatly improved, in-wheel motor radiating effect is good, in-wheel motor performance is good, operate steadily and reliably, long service life.

Referring to fig. 2, in the present embodiment, optionally, the center frame 400 includes a first portion 410 and a second portion 420, which are integrally formed, the first portion 410 is sleeved outside the motor spindle 100, and a side surface of the first portion 410 away from the motor spindle 100 is provided with a mounting portion 411 for positioning the stator core. The second portion 420 protrudes out of the first rotor housing 200 in the extending direction of the motor spindle 100.

Further, the number of the mounting portions 411 provided on the first portion 410 is plural, the plurality of mounting portions 411 are uniformly arranged at intervals in the circumferential direction of the motor spindle 100, and the plurality of mounting portions 411 collectively position the stator core.

Alternatively, the mounting portion 411 may be a mounting groove. The mounting groove includes a groove bottom wall and two opposite groove side walls, and the two groove side walls are arranged at intervals in the extending direction of the motor spindle 100. The two groove side walls are respectively connected with two opposite sides of the groove bottom wall. When assembling stator core, with stator core joint in the mounting groove, stator core's bottom and two relative lateral parts contact with the cell diapire and two cell lateral walls of mounting groove respectively, heat on the stator core transmits to centre frame 400 more easily, then transmits to motor spindle 100 and external environment in through centre frame 400 to improve heat conduction efficiency, improve the radiating efficiency, in-wheel motor's radiating effect is good.

In other embodiments, the mounting slot of the first portion 410 of the center frame 400 includes a slot bottom wall and a slot side wall, the first portion 410 of the center frame 400 has a fixing plate mounted thereon, a plate surface of the fixing plate is opposite to and spaced apart from the slot side wall, and the slot side wall and the plate surface of the fixing plate together clamp the stator core. The fixing plate and the center frame 400 may be fixedly connected by bolts.

Alternatively, the second portion 420 is cylindrical, and the second portion 420 penetrates the first rotor case 200 in the extending direction of the motor spindle 100. The second part 420 is cylindrical, the second part 420 is arranged around the motor spindle 100, the contact area between the second part 420 and the space is large, the heat exchange efficiency is high, and the heat dissipation efficiency is high.

Further, a groove 422 is provided on an end surface of the second portion 420 far from the second rotor housing 300, that is, the second portion 420 has an outer end surface 421 far from the second rotor housing 300 in the extending direction of the motor spindle 100, the outer end surface 421 is provided with the groove 422, and the surface area of the second portion 420 is increased by providing the groove 422, so that the contact area of the second portion 420 and the external environment is large, and the heat exchange efficiency is further improved.

It should be noted that the number of the grooves 422 may be one or more, and when there is one groove 422, the groove 422 may be an annular groove, and the groove 422 is disposed around the motor spindle 100, further increasing the surface area of the second portion 420. When there are a plurality of grooves 422, the grooves 422 are independent of each other, and the structural shape of the grooves 422 is not limited.

In addition, the groove 422 is located on the outer end surface, the groove depth of the groove 422 extends along the extending direction of the motor spindle 100, the groove depth of the groove 422 is not particularly limited in this embodiment, and the surface area of the second portion 420 can be increased without affecting the structural strength of the center frame 400.

In other embodiments, heat dissipation fins may be disposed on the walls of the grooves 422 to further improve heat dissipation efficiency.

In the hub motor provided by the embodiment, the assembling steps include, for example:

firstly, the second rotor housing 300 is sleeved outside the motor spindle 100 from the preset direction, then the center frame 400 is sleeved outside the motor spindle 100 from the preset direction, and a part of the center frame 400 abuts against the inner wall of the second rotor housing 300. Then, the first rotor housing 200 is sleeved outside the motor spindle 100, the first rotor housing 200 and the second rotor housing 300 are fixedly connected by bolts, and when the first rotor housing 200 is sleeved outside the motor spindle 100, the second portion 420 of the center frame 400 extends out of the first rotor housing 200.

It should be understood that any two of the first rotor housing 200, the second rotor housing 300, and the center frame 400 have an assembling relationship, and that the provision of the sealing member at the assembling position is easy to enhance the sealing property of the housing chamber 500.

The materials of first rotor case 200, second rotor case 300, and center frame 400 are not limited.

The embodiment further provides an electric vehicle, the electric vehicle comprises a wheel and an in-wheel motor, the in-wheel motor is assembled with the wheel, the first rotor shell 200 is located on the inner side of the wheel, and the second rotor shell 300 is located on the outer side of the wheel. In the operation process of the electric vehicle, heat generated in the hub motor can be directly conducted to the external environment through the center frame 400, the heat transfer efficiency is high, the heat dissipation effect is good, the operation of the hub motor is stable and reliable, the operation of the electric vehicle is stable and reliable, and the safety is high.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An in-wheel motor, comprising:

a motor spindle;

the first rotor shell is sleeved outside the motor spindle;

the second rotor shell is sleeved outside the motor spindle and connected with the first rotor shell to jointly define a containing cavity;

and the center frame is used for mounting the stator assembly, the center frame is sleeved outside the motor spindle, and part of the center frame is positioned outside the accommodating cavity.

2. The in-wheel motor of claim 1, wherein:

the central frame is provided with a groove on the part outside the containing cavity.

3. The in-wheel motor of claim 2, wherein:

the part of the center frame, which is positioned outside the accommodating cavity, is provided with an outer end face in the extension direction of the motor spindle, and the groove is formed in the outer end face.

4. The in-wheel motor of claim 3, wherein:

the groove is an annular groove and is arranged around the motor spindle.

5. The in-wheel motor of claim 1, wherein:

the part of the center frame, which is positioned outside the containing cavity, penetrates through the first rotor shell; when the in-wheel motor is assembled into a wheel, the first rotor housing is adjacent to the inner side of the wheel.

6. The in-wheel motor of claim 1, wherein:

the first rotor housing is detachably connected to the second rotor housing.

7. The in-wheel motor of claim 1, wherein:

the central frame is located the part that accomodates the cavity is indoor is equipped with the installation department that is used for installing stator core.

8. The in-wheel motor of claim 7, wherein:

the installation department is the mounting groove.

9. The in-wheel motor of claim 8, wherein:

the mounting groove include the cell bottom wall and with two groove lateral walls that the both sides that the cell bottom wall is relative are connected, the cell bottom wall and two groove lateral walls all be used for with stator core contacts.

10. An electric vehicle, characterized in that the electric vehicle comprises:

the in-wheel motor of any one of claims 1-9.