CN210201624U

CN210201624U - Pancake type electric bicycle hub motor

Info

Publication number: CN210201624U
Application number: CN201921430674.XU
Authority: CN
Inventors: Xiaohong Wang; 王晓红; Songping Fu; 傅松平; Guiming Lu; 陆桂明
Original assignee: SUZHOU XIONGFENG MOTOR Co Ltd
Current assignee: SUZHOU XIONGFENG MOTOR Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-03-27
Anticipated expiration: 2029-08-30

Abstract

The utility model discloses a pancake electric bicycle hub motor, which comprises a main shaft, a stator bracket, a stator, a rotor, a one-way bearing, a sun gear, a gear, an inner gear ring, a hub and an end cover, wherein the stator bracket is sleeved on the main shaft, the stator and the inner gear ring are fixed in the stator bracket, the inner gear ring is positioned at the opening of the stator bracket, magnetic steel is pasted outside the rotor, the inner side of the rotor is pressed and arranged in a one-way bearing, a sun wheel is pressed and arranged in the one-way bearing, the sun wheel is sleeved on the main shaft, an end cover is sleeved on one side of the main shaft close to the inner gear ring, the end cover is provided with a gear which is respectively meshed with the inner gear ring and the sun gear, the hub is positioned at the outer side of the stator bracket, and end cover fixed connection, the utility model discloses having set up one-way bearing in the motor and having replaced the clutch, having saved the setting of parts such as clutch, can reduce the volume and the weight of motor to realize pancake type motor.

Description

Pancake type electric bicycle hub motor

Technical Field

The utility model relates to an electric bicycle wheel hub motor technical field especially relates to a thin pancake type electric bicycle wheel hub motor.

Background

The hub motor of the electric bicycle has two types, namely a direct-drive motor and a speed reducing motor, the direct-drive motor needs to increase the size of the motor to meet the requirement on torque during riding, and therefore the direct-drive motor is generally heavier and cannot meet the market requirements for miniaturization and light weight.

The traditional motor is internally provided with a planetary speed reducing mechanism, so that the motor is reduced in proportion when running, an inner gear ring of the traditional motor is generally fixed on a wheel hub, a sun gear is meshed with a nylon wheel on a clutch, the nylon wheel is meshed with the inner gear ring, a rotor drives the sun gear to enable the wheel hub to rotate, the installation requirement of parts such as the clutch is high in coaxiality, and meanwhile the quality and the volume of the motor are increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pancake type electric bicycle wheel hub motor has set up one-way bearing in the motor and has replaced the clutch, saves the setting of parts such as clutch, can reduce the volume and the weight of motor to realize pancake type motor.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a pancake type electric bicycle hub motor comprises a main shaft, a stator support, a stator, a rotor, a one-way bearing, a sun gear, a gear, an inner gear ring, a hub and an end cover, wherein the stator support is sleeved on the main shaft, the stator and the inner gear ring are fixed in the stator support, the inner gear ring is positioned at an opening of the stator support, magnetic steel is attached to the outer side of the rotor, the one-way bearing is pressed into the inner side of the rotor, the sun gear is pressed into the one-way bearing, the sun gear is sleeved on the main shaft, the end cover is sleeved on one side, close to the inner gear ring, of the main shaft, the gear is arranged on the end cover, the gear is respectively meshed with the inner gear ring and the sun gear, and the.

As a further optimization, a first boss and a second boss are arranged in the stator support, the stator is pressed into the stator support and is abutted against the second boss, and the inner gear ring is pressed into the stator support and is abutted against the first boss.

As a further optimization, the gear is positioned on the end cover through the rotating shaft.

As a further optimization, the gear is a nylon wheel.

As a further optimization, a limit bearing is sleeved on the main shaft, and the sun gear is abutted to the limit bearing.

As a further optimization, the limiting bearing is a plane bearing.

As a further optimization, the hub and the end cover are fixedly connected through a locking bolt.

Compared with the prior art, the utility model discloses following beneficial effect has:

the motor is provided with the one-way bearing to replace a clutch, the rotor and the sun gear are connected through the one-way bearing, the one-way bearing does not move to drive the sun gear to rotate during forward rotation, the one-way bearing rotates the sun gear to be static during reverse rotation, idling of the motor is realized, the arrangement of parts such as the clutch is omitted, the size and the weight of the motor can be reduced, and therefore the pancake type motor is realized.

Drawings

Fig. 1 is a sectional view of the present invention.

Fig. 2 is an enlarged view of a point a in fig. 1.

In the figure, 1, a main shaft; 2. a sun gear; 3. an end cap; 4. a rotating shaft; 5. a gear; 6. locking the bolt; 7. an inner gear ring; 8. a stator support; 9. a hub; 10. a stator; 11. magnetic steel; 12. a rotor; 13. a one-way bearing; 14. a limit bearing; 81. a first boss; 82. a second boss.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 2, a pancake-type electric bicycle hub motor includes a main shaft 1, a stator support 8, a stator 10, a rotor 12, a one-way bearing 13, a sun gear 2, a gear 5, an inner gear ring 7, a hub 9 and an end cover 3, wherein the stator support 8 is sleeved on the main shaft 1, the stator 10 and the inner gear ring 7 are fixed in the stator support 8, the inner gear ring 7 is located at an opening of the stator support 8, magnetic steel 11 is attached to the outer side of the rotor 12, the one-way bearing 13 is press-fitted into the inner side of the rotor 12, the sun gear 2 is press-fitted into the one-way bearing 13, the sun gear 2 is sleeved on the main shaft 1, the end cover 3 is sleeved on the main shaft 1 near the inner gear ring 7, the gear 5 is arranged on the end cover 3, the gear 5 is respectively engaged with the inner gear ring 7 and the.

The sun gear 2 is pressed into the one-way bearing 13, the one-way bearing 13 is pressed into the rotor 12, then the rotor 12 and the sun gear 2 are sleeved on the main shaft 1 and are connected through the one-way bearing 13, when the rotor 12 rotates forwards, the sun gear 2 rotates through the one-way bearing 13, the gear 5 meshed with the sun gear 2 and the inner gear ring 7 rotates, so that the end cover 3 and the hub 9 are driven to rotate, when the rotor 12 rotates backwards, the one-way bearing 13 is driven to rotate by the rotor 12, the sun gear 2 does not rotate along with the rotor, therefore, the motor can idle, and the clutch is replaced by the one-way bearing 13, so that the integral volume and mass of the hub motor are reduced; compare simultaneously and set up on wheel hub in traditional ring gear, the utility model discloses set up the ring gear on stator support, then mesh mutually with the gear on the end cover, the space that can reduce the motor in the axial and occupy.

A first boss 81 and a second boss 82 are arranged in the stator support 8, the stator 10 is pressed into the stator support 8 and is abutted against the second boss 82, the inner gear ring 7 is pressed into the stator support 8 and is abutted against the first boss 81, and by arranging the first boss and the second boss, the mounting steps can be simplified, and the stator and the inner gear ring can be conveniently and accurately mounted and positioned; meanwhile, the sun gear, the one-way bearing and the rotor are installed in a press-fitting mode, so that the installation is rapid and convenient.

The gear 5 is a nylon wheel which is positioned on the end cover 3 by the rotating shaft 4.

The main shaft 1 is sleeved with a limiting bearing 14, the limiting bearing 14 is a plane bearing, and the sun gear 2 is abutted to the limiting bearing 14.

The hub 9 and the end cover 3 are fixedly connected through the locking bolt 6.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A pancake type electric bicycle hub motor comprises a main shaft (1), a stator support (8), a stator (10), a rotor (12), a one-way bearing (13), a sun gear (2), a gear (5), an inner gear ring (7), a hub (9) and an end cover (3), and is characterized in that the stator support (8) is sleeved on the main shaft (1), the stator (10) and the inner gear ring (7) are fixed in the stator support (8), the inner gear ring (7) is positioned at an opening of the stator support (8), magnetic steel (11) is attached to the outer side of the rotor (12), the one-way bearing (13) is pressed into the inner side of the rotor (12), the sun gear (2) is pressed into the one-way bearing (13), the sun gear (2) is sleeved on the main shaft (1), the end cover (3) is sleeved on the main shaft (1) and is close to one side of the inner gear ring (7), the end cover (3) is provided with a gear (5), the gear (5) is respectively meshed with the inner gear ring (7) and the sun gear (2), and the hub (9) is located on the outer side of the stator support (8) and is fixedly connected with the end cover (3).

2. The pancake type electric bicycle hub motor according to claim 1, wherein the stator frame (8) has a first boss (81) and a second boss (82) therein, the stator (10) is press-fitted into the stator frame (8) and abuts against the second boss (82), and the ring gear (7) is press-fitted into the stator frame (8) and abuts against the first boss (81).

3. Pancake electric bicycle hub motor according to claim 1, characterized in that the gear (5) is positioned on the end cap (3) by means of a rotating shaft (4).

4. The pancake electric bicycle hub motor according to claim 1, wherein the gear (5) is a nylon wheel.

5. The pancake type electric bicycle hub motor according to claim 1, wherein the main shaft (1) is sleeved with a limit bearing (14), and the sun gear (2) abuts against the limit bearing (14).

6. Pancake electric bicycle hub motor according to claim 5, characterized in that the limit bearing (14) is a flat bearing.

7. Pancake electric bicycle hub motor according to claim 1, characterized by that the hub (9) and end cap (3) are fixedly connected by means of locking bolts (6).