CN213990342U

CN213990342U - Hub motor assembling structure

Info

Publication number: CN213990342U
Application number: CN202022576140.7U
Authority: CN
Inventors: 王清华; 王英喆; 宋成川
Original assignee: Bafang Electric Suzhou Co Ltd
Current assignee: Bafang Electric Suzhou Co Ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-08-17
Anticipated expiration: 2030-11-10

Abstract

The utility model discloses an in-wheel motor assembly structure, it relates to the in-wheel motor field. Its technical scheme main points include motor shaft, end cover and are fixed in stator on the motor shaft, be connected through first bearing between end cover and the stator. The utility model discloses be connected the end cover with the stator through first bearing to increased the space between motor shaft and the end cover, be favorable to more diversified motor structural design.

Description

Hub motor assembling structure

Technical Field

The utility model relates to an in-wheel motor field, more specifically say, it relates to an in-wheel motor assembly structure.

Background

In the existing electric bicycle, an end cover in an assembling structure of a hub motor is connected with a motor shaft through a bearing.

For example, chinese patent with publication No. CN108242866A discloses a hub motor, which includes a motor shaft, a hub, a first outer end cap, a second outer end cap, a stator fixing device, and a rotor, where the first outer end cap and the second outer end cap are respectively supported on the motor shaft through bearings, and the stator is fixed on the motor shaft through the stator fixing device.

Although the way that the end cover is connected with the motor shaft through the bearing is simple, the space utilization between the end cover and the motor shaft is limited, and other parts cannot be assembled between the end cover and the motor shaft.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a wheel hub motor assembly structure, it is connected the end cover with the stator through first bearing to increased the space between motor shaft and the end cover, be favorable to more diversified motor structural design.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides an in-wheel motor assembly structure, includes motor shaft, end cover and is fixed in stator on the motor shaft, be connected through first bearing between end cover and the stator.

Furthermore, the first bearing comprises an outer ring and an inner ring, a positioning spigot matched with the outer ring is arranged on the inner end face of the end cover, and a positioning clamping groove matched with the inner ring is arranged on the end face of the stator.

Furthermore, the end face of the outer ring and the inner end face of the positioning clamping groove are arranged in a gap.

Furthermore, a gasket is arranged between the end face of the inner ring and the inner end face of the positioning clamping groove.

Furthermore, the inner end face of the positioning clamping groove is provided with a yielding sinking groove opposite to the outer ring.

Further, a fixed ring plate is arranged on the motor shaft, and the stator is fixedly connected with the fixed ring plate through a fixing bolt.

Further, the end cover is connected with a hub, and the hub is supported on the motor shaft through a second bearing.

Further, the inner circumferential side wall of the end cover is provided with a functional piece.

Further, the functional member is a ratchet.

To sum up, the utility model discloses following beneficial effect has:

the end cover is supported on the stator through the first bearing, so that the space between the end cover and the motor shaft can be increased, and more diversified structural design of the motor is facilitated.

Drawings

FIG. 1 is a sectional view showing an assembling structure of an in-wheel motor in the embodiment;

fig. 2 is a partial sectional view of an in-wheel motor assembling structure in the embodiment.

In the figure: 1. a motor shaft; 11. a stationary ring plate; 2. a stator; 21. positioning the clamping groove; 22. a yielding sink groove; 3. fixing the bolt; 4. an end cap; 41. positioning a spigot; 5. a hub; 6. a first bearing; 7. a second bearing; 8. and (4) ratchet wheels.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Example (b):

an in-wheel motor assembly structure, refer to fig. 1, includes a motor shaft 1, an end cover 4 and a stator 2 fixed on the motor shaft 1, the end cover 4 is connected with the stator 2 through a first bearing 6; in the embodiment, the end cover 4 is supported on the stator 2 through the first bearing 6 and is not connected with the motor shaft 1, so that the space between the end cover 4 and the motor shaft 1 can be enlarged, and more diversified structural designs of the motor are facilitated; in this embodiment, the functional member is arranged on the inner circumferential side wall of the end cover 4, and the functional member is a ratchet 8.

Referring to fig. 1 and 2, the first bearing 6 is a rolling bearing including an outer ring and an inner ring; the inner end face of the end cover 4 is provided with a positioning spigot 41 matched with the outer ring, and the end face of the stator 2 is provided with a positioning clamping groove 21 matched with the inner ring; the positioning spigot 41 carries out axial and radial limiting positioning on the outer ring, and the positioning clamping groove 21 carries out bearing and radial limiting on the inner ring, so that the connection stability of the end cover 4, the first bearing 6 and the stator 2 can be ensured; in other alternative embodiments, the outer ring may be connected to the stator 2, and the inner ring may be connected to the end cover 4, which is not limited herein.

Referring to fig. 1 and 2, in the present embodiment, the outer ring and the inner circumferential side wall and the inner end surface of the positioning clamping groove 21 are in clearance fit, and the inner ring is not in contact with the end cover 4; in order to make the outer ring and the inner end surface of the positioning clamping groove 21 be in clearance fit, in this embodiment, the inner end surface of the positioning clamping groove 21 is provided with a yielding sunken groove 22 opposite to the outer ring, and in other optional embodiments, a gasket may be provided between the end surface of the inner ring and the inner end surface of the positioning clamping groove 21, so that the outer ring and the inner end surface of the positioning clamping groove 21 are not in contact.

Referring to fig. 1, a motor shaft 1 is provided with a fixed ring plate 11, and a stator 2 is fixedly connected with the fixed ring plate 11 through a fixing bolt 3; in other alternative embodiments, the stator 2 and the motor shaft 1 may be fixedly connected by other structures; the end cover 4 is connected with a hub 5, the hub 5 is supported on the motor shaft 1 through a second bearing 7, and the end cover 4 is matched with the hub 5 to cover the stator 2 and the rotor.

Claims

1. The utility model provides an in-wheel motor assembly structure, includes motor shaft, end cover and is fixed in stator on the motor shaft, its characterized in that: the end cover is connected with the stator through a first bearing.

2. The in-wheel motor assembling structure according to claim 1, wherein: the first bearing comprises an outer ring and an inner ring, a positioning spigot matched with the outer ring is arranged on the inner end face of the end cover, and a positioning clamping groove matched with the inner ring is arranged on the end face of the stator.

3. The in-wheel motor assembling structure according to claim 2, wherein: the end face of the outer ring and the inner end face of the positioning clamping groove are arranged in a clearance mode.

4. The in-wheel motor assembling structure according to claim 3, wherein: and a gasket is arranged between the end surface of the inner ring and the inner end surface of the positioning clamping groove.

5. The in-wheel motor assembling structure according to claim 3, wherein: and the inner end surface of the positioning clamping groove is provided with a yielding sinking groove opposite to the outer ring.

6. The in-wheel motor assembling structure according to any one of claims 1 to 5, wherein: the motor shaft is provided with a fixed ring plate, and the stator is fixedly connected with the fixed ring plate through a fixing bolt.

7. The in-wheel motor assembling structure according to any one of claims 1 to 5, wherein: the end cover is connected with a hub, and the hub is supported on the motor shaft through a second bearing.

8. The in-wheel motor assembling structure according to any one of claims 1 to 5, wherein: the inner circumferential side wall of the end cover is provided with a functional piece.

9. The in-wheel motor assembling structure according to claim 8, wherein: the functional part is a ratchet wheel.