CN212012303U - Rotor assembly, in-wheel motor and wheel - Google Patents

Abstract

The utility model provides a rotor assembly, a hub motor and a wheel, wherein the rotor assembly comprises a rotor main body, a rotor shell, radiating fins and an installation part, the rotor main body is connected with the rotor shell, and the radiating fins are connected with the installation part; the mounting piece is connected with the rotor main body and is relatively fixed in the circumferential direction of the rotor main body, and the heat dissipation fins and the mounting piece can rotate along with the rotation of the rotor main body. The hub motor has high heat dissipation efficiency and long service life.

Description

Rotor assembly, in-wheel motor and wheel

Technical Field

The utility model relates to the technical field of electric machines, particularly, relate to a rotor subassembly, in-wheel motor and wheel.

Background

The hub motor is usually an outer rotor motor, and the rotor is fixed with the wheel and directly drives the wheel to rotate when the rotor rotates, so that the aim of omitting a transmission mechanism is fulfilled. A rotor assembly of the hub motor is sleeved outside the stator assembly, and a large amount of heat is generated after a winding on the stator assembly is electrified.

Research shows that the existing hub motor has the following defects:

1. the water cooling heat dissipation is adopted, a water cooling device needs to be added in the original motor, the weight and the volume of the motor are increased, the power density of the motor is reduced, and the water path design of a heat dissipation system is complex, so that the possibility of water leakage exists;

2. adopt natural forced air cooling design, because the in-wheel motor space is narrow and small, and the portion that generates heat (stator part promptly) is located inside the motor, the heat is difficult to conduct to the outside, is difficult to long-time high-power operation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rotor subassembly, in-wheel motor and wheel, it can improve heat conduction efficiency to improve in-wheel motor's radiating efficiency.

The embodiment of the utility model is realized like this:

in a first aspect, an embodiment of the present invention provides a rotor assembly, which includes:

rotor main part, rotor shell, radiating fin and installed part, rotor main part are connected with rotor shell, and radiating fin is connected with the installed part, and the installed part is connected with rotor main part, and the two is relatively fixed in rotor main part's circumference, and radiating fin and installed part rotate along with rotor main part's rotation.

In an alternative embodiment, the heat sink fins are in contact with the inner side wall of the rotor housing.

In an alternative embodiment, the mounting member is sleeved outside the rotor body.

In an optional embodiment, the mounting member has a first cylinder section and a second cylinder section, one end of the first cylinder section is connected with one end of the second cylinder section, and the first cylinder section is sleeved outside the rotor main body; the second cylinder section is of a conical structure, and the inner diameter and the outer diameter of the second cylinder section are gradually reduced along the direction from the first cylinder section to the second cylinder section; the radiating fins are arranged on the outer cylinder wall of the first cylinder section and/or the second cylinder section.

In an optional embodiment, the number of the heat dissipation fins is multiple, and the multiple heat dissipation fins are connected with the mounting piece and are arranged at intervals along the circumferential direction of the mounting piece.

In an alternative embodiment, the mounting member is removably connected to the rotor body.

In an alternative embodiment, the heat sink fins are welded to the mounting member.

In an alternative embodiment, the heat dissipating fins are arcuate pieces.

In a second aspect, an embodiment of the present invention provides an in-wheel motor, in-wheel motor includes:

a rotor assembly according to any one of the preceding embodiments.

In a third aspect, an embodiment of the present invention provides a wheel, including:

the in-wheel motor of the foregoing embodiments.

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

to sum up, the rotor subassembly that this embodiment provided sets up the installed part through setting up the installed part on rotor main body, sets up radiating fin on the installed part, and when the rotor subassembly rotated for stator module, radiating fin rotated for stator module, and the heat that produces between stator module and the rotor subassembly passes through stator module's stator shaft and transmits to rotor main body on, then transmits to the installed part through rotor main body, last transmission to radiating fin on, because radiating fin's setting, improved the inside heat of motor and passed through the efficiency of conduction to rotor housing in the motor to improve the radiating efficiency. Meanwhile, when the radiating fins rotate along with the rotor main body, air flow is accelerated under the action of the radiating fins, wind power is generated in the shell, and the radiating efficiency can be improved.

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 view of a rotor assembly according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a rotor body and a rotor housing according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a heat dissipation fin and a mounting member according to an embodiment of the present invention;

fig. 4 is a front view of a heat dissipating fin and a mounting member according to an embodiment of the present invention.

Icon:

100-a rotor assembly; 110-a rotor body; 120-a rotor housing; 121-a bottom plate; 122-a coaming; 123-inner side wall; 130-heat dissipation fins; 131-an outer edge; 140-a mount; 141-a first barrel section; 142-second barrel section.

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 to 4, the present embodiment provides a rotor assembly 100, which may be suitable for an in-wheel motor, and when the rotor assembly 100 rotates, wind power may be formed in a housing of the in-wheel motor, so as to accelerate air flow, improve heat dissipation efficiency of the in-wheel motor, improve a working environment of the in-wheel motor, and prolong a service life of the in-wheel motor.

It should be understood that the rotor assembly 100 may also be adapted for use with other types of electric machines.

Referring to fig. 1, in the present embodiment, the rotor assembly 100 includes a rotor body 110, a rotor housing 120, heat dissipation fins 130 and a mounting member 140, wherein the rotor body 110 is connected to the rotor housing 120, and the heat dissipation fins 130 are connected to the mounting member 140; the mounting member 140 is connected to the rotor body 110 and fixed relative to the rotor body 110 in a circumferential direction of the rotor body 110, and the heat dissipating fins 130 and the mounting member 140 can rotate with the rotation of the rotor body 110.

The rotor assembly 100 provided by this embodiment, through set up installed part 140 on rotor main body 110, set up radiating fin 130 on installed part 140, when rotor assembly 100 rotates for stator assembly, radiating fin 130 rotates for stator assembly, the heat that produces between stator assembly and the rotor assembly 100 passes through stator module's stator axle and transmits to rotor main body 110 on, then transmit to installed part 140 through rotor main body 110, last transmit to radiating fin 130 on, because radiating fin 130's setting, improve the inside heat of motor and pass through the efficiency of conduction to rotor housing 120 in the motor, thereby improve the radiating efficiency. Meanwhile, when the heat dissipation fins 130 rotate together with the rotor body 110, the flow of air is accelerated under the action of the heat dissipation fins 130, so that wind power is generated in the casing, and the heat dissipation efficiency can also be improved. Meanwhile, the heat dissipation fins 130 are mounted on the mounting members 140, and then the heat dissipation fins 130 are mounted on the rotor body 110 through the mounting members 140, and the heat dissipation fins 130 and the mounting members 140 can be made into a kit and directly matched with the rotor bodies 110 of different models, thereby improving the assembly efficiency.

In this embodiment, optionally, the rotor body 110 is provided with a through hole for inserting the stator shaft, and the cross section of the rotor body 110 is substantially circular, wherein the cross section of the rotor body 110 refers to a plane perpendicular to the axis of the rotor body 110.

Referring to fig. 2, optionally, the rotor housing 120 has a bottom plate 121 and a shroud 122, the shroud 122 extends annularly around an axis of the bottom plate 121, the shroud 122 is connected to a circumferential surface of the bottom plate 121, the bottom plate 121 and the shroud 122 together form a circular groove structure, and a notch is formed at one end of the shroud 122 away from the bottom plate 121. The base plate 121 may be a circular plate, and the rotor body 110 is fixed to the base plate 121 in a region surrounded by the shroud 122. Further, the rotor body 110 and the base plate 121 are coaxially disposed.

It should be noted that the bottom plate 121 and the enclosing plate 122 may be manufactured by an integral molding method. For example, the bottom plate 121 and the shroud 122 are formed by drawing.

Optionally, a through hole is formed in the middle of the bottom plate 121.

Alternatively, the rotor body 110 is a cylindrical structure, the rotor body 110 may be a cylindrical cylinder, and a cylinder cavity of the rotor body 110 is communicated and coaxial with the through hole of the bottom plate 121.

Alternatively, the rotor body 110 is integrally formed with the rotor housing 120. The overall structure formed by the rotor housing 120 and the rotor housing 120 has high structural strength, is not easy to deform, and has long service life.

Referring to fig. 3 and 4, in the present embodiment, optionally, the mounting member 140 is a cylindrical structure, the mounting member 140 is provided with an inner hole, and the mounting member 140 is sleeved outside the rotor body 110 through the inner hole. After the mounting member 140 is sleeved outside the rotor body 110, the mounting member 140 and the rotor body 110 are relatively fixed in the circumferential direction of the rotor body 110, that is, the mounting member 140 can rotate along with the rotation of the rotor body 110. Alternatively, the mount 140 and the rotor body 110 may be keyed; or the mounting member 140 is connected to the rotor body 110 by interference fit.

Optionally, the mounting member 140 includes a first cylindrical section 141 and a second cylindrical section 142, one end of the first cylindrical section 141 and one end of the second cylindrical section 142 are connected and communicated with each other, and the first cylindrical section 141 and the second cylindrical section 142 are coaxially disposed.

Further, the first cylinder section 141 may be a cylindrical cylinder, the second cylinder section 142 may be a tapered cylinder, the inner diameter and the outer diameter of the second cylinder section 142 are gradually reduced in the direction from the first cylinder section 141 to the second cylinder section 142, and the inner diameter of the connection between the second cylinder section 142 and the first cylinder section 141 is equal to the inner diameter of the first cylinder section 141. The minimum inner diameter of the second cylinder section 142 is not smaller than the inner diameter of the rotor body 110, so that the second cylinder section 142 does not interfere with the stator shaft, and the assembly of the stator shaft and the rotor body 110 is not easily affected.

In this embodiment, the heat dissipation fins 130 are assembled on the outer cylindrical wall of the mounting member 140, the number of the heat dissipation fins 130 may be multiple, and the plurality of heat dissipation fins 130 are uniformly arranged on the outer cylindrical wall of the mounting member 140 at intervals. Optionally, each heat dissipation fin 130 may be an arc-shaped fin, so that the component force is more concentrated, and the heat dissipation efficiency is improved.

Alternatively, the heat dissipation fins 130 may be connected to the first barrel section 141 and/or the second barrel section 142.

It should be noted that the heat dissipation fins 130 and the first cylinder section 141 and/or the second cylinder section 142 may be fixed by welding.

In this embodiment, the heat dissipation fins 130 are connected to the first cylindrical section 141 and the second cylindrical section 142 at the same time, the contact area between the heat dissipation fins 130 and the mounting member 140 is large, the connection structure is firm, the heat dissipation fins are not easy to be separated, and the use is safe and reliable; meanwhile, the heat dissipation fins 130 extend from the first cylindrical section 141 to the second cylindrical section 142, and the heat dissipation fins 130 are longer in length and can provide larger wind power. Moreover, when the mounting member 140 is mounted on the rotor body 110, the first tube section 141 is connected to the rotor body 110, and the first tube section 141 and the second tube section 142 form a bending structure at a connection position, so that the bending structure can limit the depth of the first tube section 141 inserted into the rotor body 110, and the situation that the first tube section 141 is excessively contacted with the bottom plate 121 during plugging to deform the bottom plate 121 and affect the normal operation of the rotor housing 120 is avoided. Further, the second cylinder section 142 is in a conical structure, the outer circumferential wall of the second cylinder section 142 is inclined from inside to outside, when the heat dissipation fins 130 with the same width are installed, the distance between the outer edge 131 of the heat dissipation fin 130 and the axis of the second cylinder section 142 is small, wherein the width of the heat dissipation fin 130 extends along the radial direction of the rotor body 110; the outer edge 131 of the heat dissipation fin 130 refers to a side edge of the heat dissipation fin 130 away from the second cylinder section 142 in the width direction, in other words, a portion of the heat dissipation fin 130 located in the second cylinder section 142 is closer to the axis of the rotor body 110, and when the heat dissipation fin 130 rotates along with the rotor body 110, the centrifugal force generated by the heat dissipation fin 130 is small, the influence on the rotational stability of the rotor body 110 is small, and the normal operation of the in-wheel motor is not easily influenced.

Optionally, one side of the heat dissipation fins 130 contacts with the inner side wall 123 of the bottom plate 121, and the heat dissipation fins 130 can directly conduct heat to the bottom plate 121, so that efficiency of conducting heat inside the motor to the rotor housing 120 through the heat dissipation fins 130 is further improved, and further heat dissipation efficiency is improved.

In the rotor assembly 100 provided by the present embodiment, the heat dissipation fins 130 are mounted on the rotor body 110 by using the mounting members 140, one sides of the heat dissipation fins 130 are connected by the mounting members 140, and the heat dissipation fins 130 have no suspended portion, and are not easily deformed and are not easily subjected to abnormal sound during use. And when passing the stator shaft through the second cylinder section 142 and fitting with the inner hole of the rotor body 110, the second cylinder section 142 may contact the stator shaft, so that the heat generated on the stator shaft is transferred to the heat dissipation fins 130 through the mounting member 140, and since the heat dissipation fins 130 have a large contact area with the air, the heat dissipation efficiency can be improved through the heat dissipation fins 130. And the heat dissipation fins 130 are in contact with the rotor housing 120, and can conduct part of the heat to the rotor housing 120, thereby enhancing the heat dissipation effect of the rotor housing 120. Meanwhile, the heat dissipation fins 130 rotate along with the rotation of the rotor body 110, and the air flow is accelerated when the heat dissipation fins 130 rotate, thereby further improving the heat dissipation efficiency. In the motor working process, during a large amount of heats that the winding produced can be conducted to the external environment fast through radiating fin 130, rotor case 120 and the wind-force that produces when radiating fin 130 rotates, the radiating effect of motor is good to local too high temperature's phenomenon when having slowed down the motor work, motor operational environment is good, and motor work is more reliable and more stable.

The embodiment also provides an in-wheel motor, including foretell rotor subassembly 100, in-wheel motor's radiating effect is good, and work safe and reliable.

The embodiment further provides a wheel, the wheel includes the above-mentioned in-wheel motor, rotor assembly 100 of in-wheel motor is connected with the wheel body of wheel, and rotor assembly 100 drives the wheel body to rotate together when rotating. The inside radiating effect of wheel is good, uses safe and reliable.

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 (10)

1. A rotor assembly, characterized in that it comprises:

the rotor comprises a rotor body, a rotor shell, radiating fins and mounting pieces, wherein the rotor body is connected with the rotor shell, and the radiating fins are connected with the mounting pieces; the mounting piece is connected with the rotor main body and is relatively fixed in the circumferential direction of the rotor main body, and the heat dissipation fins and the mounting piece can rotate along with the rotation of the rotor main body.

2. The rotor assembly of claim 1, wherein:

the heat dissipation fins are in contact with the inner side wall of the rotor shell.

3. The rotor assembly of claim 1, wherein:

the mounting piece is sleeved outside the rotor main body.

4. The rotor assembly of claim 3, wherein:

the mounting piece is provided with a first cylinder section and a second cylinder section, one end of the first cylinder section is connected with one end of the second cylinder section, and the first cylinder section is sleeved outside the rotor main body; the second cylinder section is of a conical structure, and the inner diameter and the outer diameter of the second cylinder section are gradually reduced along the direction from the first cylinder section to the second cylinder section; the radiating fins are arranged on the outer cylinder wall of the first cylinder section and/or the second cylinder section.

5. The rotor assembly of claim 3, wherein:

the quantity of radiating fin is a plurality of, and is a plurality of radiating fin all with the installed part is connected, and follows the circumference interval of installed part arranges.

6. The rotor assembly of claim 1, wherein:

the mounting member is detachably connected to the rotor body.

7. The rotor assembly of claim 1, wherein:

the radiating fins are welded and fixed with the mounting pieces.

8. The rotor assembly of claim 1, wherein:

the radiating fins are arc-shaped pieces.

9. An in-wheel motor, characterized in that, the in-wheel motor includes:

a rotor assembly as claimed in any one of claims 1 to 8.

10. A wheel, characterized in that it comprises:

the in-wheel motor of claim 9.

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