CN212811483U

CN212811483U - Direct-drive hub motor integrated with clutch

Info

Publication number: CN212811483U
Application number: CN202022124561.6U
Authority: CN
Inventors: 王清华; 王英喆; 傅世军; 黄善劲
Original assignee: Bafang Electric Suzhou Co Ltd
Current assignee: Bafang Electric Suzhou Co Ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-03-26
Anticipated expiration: 2030-09-24

Abstract

The utility model discloses an integrated clutch directly drive in-wheel motor, it relates to the in-wheel motor field. The technical scheme is characterized by comprising a main shaft; the stator assembly is fixedly sleeved on the main shaft; the rotor is sleeved on the main shaft through a bearing, and magnetic steel matched with the stator assembly is arranged on the rotor; a housing sleeved on the main shaft through a bearing; and the clutch assembly is sleeved on the main shaft through a bearing sleeve, and is borne between the shell and the rotor and used for realizing one-way transmission. The utility model has the advantages of simple structure is reliable, convenient assembling and long service life.

Description

Direct-drive hub motor integrated with clutch

Technical Field

The utility model relates to an in-wheel motor field, more specifically say, it relates to an integrated clutch directly drive in-wheel motor.

Background

The common hub motor of the electric vehicle in the market at present adopts a direct-drive structure, a magnetic steel ring of the direct-drive structure is directly cast with a hub, magnetic steel is bonded on the magnetic steel ring by glue, and a magnetic field directly drives the hub to rotate after the direct-drive structure is started.

However, the motor has obvious defects, when a vehicle is in a downhill or deceleration sliding state, the magnetic pulling force exists between the stator of the motor and the magnetic steel, and the magnetic pulling force blocks the rotation of the hub, so that the sliding distance is reduced, the cruising distance of the whole vehicle is reduced, and the energy consumption of the electric vehicle is increased. Meanwhile, under the sliding state, the hub, the magnetic steel ring and the magnetic steel are integrally rotated, electromotive force is generated in the stator coil, and the generated electromotive force impacts components in the controller to easily cause damage to components of the controller.

The traditional Chinese patent with the publication number of CN204316245U discloses a brushless direct current electric vehicle low-speed motor with a clutch structure, which comprises a shaft, wherein a stator winding is clamped in the middle of the shaft, a rotor right shell is movably sleeved on the right side of the stator winding through a bearing, a one-way clutch is sleeved on the outer side of the rotor right shell, a hub is clamped on the outer side of the one-way clutch, a rotor left shell is movably sleeved on the stator winding through a bearing, magnetic steel is connected between the outer edge of the rotor right shell and the outer edge of the rotor left shell, and a steel ring is arranged on the outer side of the magnetic steel.

The motor in the patent realizes the separation and the cooperation function of the hub and the rotor shell by adding the one-way clutch between the hub and the rotor shell, and solves the problems of the common direct-drive hub motor.

However, in the above patent, the rotor structure includes rotor right side shell, rotor left side shell, steel ring and magnet steel, and its structure is comparatively complicated, and the assembly is inconvenient, and one way clutch should realize fixing through interference fit moreover, and not only high to spare part required precision like this, the installation degree of difficulty is big moreover, the condition of slippage still can appear after long-time the use.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide an integrated clutch directly drive in-wheel motor, it has simple structure reliably, convenient assembling and long service life's advantage.

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

a clutch-integrated direct drive in-wheel motor comprising:

a main shaft;

the stator assembly is fixedly sleeved on the main shaft;

the rotor is sleeved on the main shaft through a bearing, and magnetic steel matched with the stator assembly is arranged on the rotor;

a housing sleeved on the main shaft through a bearing; and the number of the first and second groups,

the clutch assembly is arranged on the main shaft in a sleeved mode through a bearing and is borne between the casing and the rotor for achieving one-way transmission.

Furthermore, the clutch assembly comprises a clutch and a linkage ring, wherein the clutch comprises an outer ring fixedly connected with the inner wall of the shell and an inner ring sleeved on the main shaft through the bearing; the linkage ring is fixedly connected with the rotor, and can be linked with the inner ring along the circumferential direction.

Further, the outer ring is fixedly connected with the machine shell through bolts.

Furthermore, the inner wall of the shell is provided with a positioning convex ring which is in contact with the outer side wall of the outer ring.

Furthermore, the linkage ring and the inner ring are matched in an axial clamping and embedding mode to realize circumferential linkage.

Furthermore, the end face of the inner ring is provided with a limiting ring, the outer side wall of the limiting ring is provided with a plurality of splines, and the inner side wall of the linkage ring is provided with a plurality of key grooves matched with the splines.

Furthermore, the end face of the inner ring is provided with a limiting ring, and the outer side wall of the limiting ring is in threaded connection with the inner side wall of the linkage ring.

Further, the linkage ring is fixedly connected with the rotor through bolts.

Furthermore, the linkage ring comprises a positioning ring and a positioning plate arranged on the outer side wall of the positioning ring; the positioning plate is fixedly connected with the rotor through bolts.

Further, the outer side wall of the positioning ring is in contact fit with the inner side wall of the middle hole of the rotor.

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

1. by adopting the clutch, the vehicle slides forwards in a sliding state, the clutch slides, and the shell does not drive the rotor to rotate together with the rotation of the shell, so that the magnetic pull force and the counter electromotive force between the magnetic steel and the stator assembly are eliminated; in the electric state, the clutch is locked, the rotor drives the shell to rotate through the clutch, and the vehicle accelerates;

2. the clutch is fixedly connected with the casing through the bolt, the linkage ring is fixedly connected with the rotor through the bolt, and the clutch and the rotor are matched with the key groove in a clamping and embedding manner through the spline to realize circumferential linkage, so that the effects of simple and reliable structure, convenience in assembly and long service life are achieved.

Drawings

FIG. 1 is a schematic structural diagram of a clutch-integrated direct-drive hub motor according to an embodiment;

FIG. 2 is a schematic structural diagram of a clutch and a coupling ring according to an embodiment.

In the figure: 1. a main shaft; 2. a stator assembly; 3. a rotor; 31. magnetic steel; 32. a first bearing; 41. a hub; 42. a left end cap; 421. positioning the convex ring; 422. a second bearing; 43. a right end cap; 431. a third bearing; 5. a link ring; 51. a positioning ring; 52. a keyway; 53. positioning a plate; 6. a clutch; 61. an outer ring; 62. an inner ring; 63. a limiting ring; 64. a spline; 7. and a fourth bearing.

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):

the utility model provides an integrated clutch's direct-drive in-wheel motor, refers to fig. 1, and it includes main shaft 1 and casing, and the casing includes wheel hub 41, left end lid 42 and right-hand member lid 43 in this embodiment, and the three passes through bolt fixed connection, and wherein left end lid 42 overlaps on main shaft 1 through second bearing 422 cover, and right-hand member lid 43 overlaps on main shaft 1 through third bearing 431 cover.

Referring to fig. 1, a stator assembly 2 and a rotor 3 are arranged in a casing, the stator assembly 2 is fixedly sleeved on a main shaft 1, the rotor 3 is sleeved on the main shaft 1 through two first bearings 32, and a magnetic steel 31 matched with the stator assembly 2 is arranged on the rotor 3; rotor 3 cross-section is the U type in this embodiment, structurally includes that two are the ring board of inside and outside setting to and connect the end plate between two ring boards.

Referring to fig. 1 and 2, a clutch assembly for realizing one-way transmission is arranged between the left end cover 42 and the rotor 3, and comprises a clutch 6 and a linkage ring 5; the clutch in this embodiment is a one-way bearing clutch, which includes an outer ring 61 fixedly connected with the inner wall of the left end cover 42 through a bolt, and an inner ring 62 sleeved on the main shaft 1 through a fourth bearing 7; the inner wall of the left end cover 42 is provided with a positioning convex ring 421 contacting with the outer side wall of the outer ring 61, which can play a role in positioning stably and assembling conveniently; the link ring 5 is fixedly connected with the rotor 3, and the link ring 5 can be linked with the inner ring 62 along the circumferential direction.

Referring to fig. 1 and 2, the link ring 5 and the inner ring 62 may be axially engaged and engaged to realize circumferential linkage, or may be connected by reverse threads to realize circumferential linkage, which is an axially engaged and engaged structure in this embodiment; a limiting ring 63 is arranged on the end face of the inner ring 62, and a plurality of splines 64 are uniformly distributed on the outer side wall of the limiting ring 63 along the circumferential direction; the linkage ring 5 comprises a positioning ring 51 and a positioning plate 53 arranged on the outer side wall of the positioning ring 51, and a plurality of key slots 52 matched with the splines 64 are arranged on the inner side wall of the positioning plate 53; the spline 64 and the key groove 52 are in snap fit engagement in the axial direction, so that the circumferential linkage of the link ring 5 and the inner ring 62 can be realized.

Referring to fig. 1 and 2, the end face of the positioning plate 53 contacts the rotor 3, and the two are fixedly connected by bolts; in this embodiment, the positioning ring 51 extends into the central hole of the rotor 3, and the outer side wall of the positioning ring 51 contacts with the inner side wall of the central hole of the rotor 3, so that the positioning function is achieved, and the linkage ring 5 is convenient to mount.

The working principle is as follows:

clutch 6 passes through bolted connection with left end cover 42, and link ring 5 passes through bolted connection with rotor 3, then link ring 5 and clutch 6 realize the circumference linkage through the axial inlay card cooperation, can reduce the requirement of parts machining precision on the one hand to reduce the assembly degree of difficulty, improve production efficiency, on the other hand can guarantee the steadiness and the reliability of connecting, the condition of slippage can not appear, thereby can increase of service life.

Claims

1. The utility model provides an integrated clutch directly drive in-wheel motor which characterized in that: the method comprises the following steps:

a main shaft;

the stator assembly is fixedly sleeved on the main shaft;

2. The clutch-integrated direct drive hub motor as claimed in claim 1, wherein: the clutch assembly comprises a clutch and a linkage ring, wherein the clutch comprises an outer ring fixedly connected with the inner wall of the shell and an inner ring sleeved on the main shaft through a bearing; the linkage ring is fixedly connected with the rotor, and can be linked with the inner ring along the circumferential direction.

3. The clutch-integrated direct drive in-wheel motor as claimed in claim 2, wherein: the outer ring is fixedly connected with the machine shell through bolts.

4. The clutch-integrated direct drive hub motor as claimed in claim 3, wherein: and the inner wall of the shell is provided with a positioning convex ring which is in contact with the outer side wall of the outer ring.

5. The clutch-integrated direct drive in-wheel motor as claimed in claim 2, wherein: the linkage ring and the inner ring are matched in an axial clamping and embedding mode to realize circumferential linkage.

6. The clutch-integrated direct drive in-wheel motor as claimed in claim 5, wherein: the inner ring end face is provided with a limiting ring, the outer side wall of the limiting ring is provided with a plurality of splines, and the inner side wall of the linkage ring is provided with a plurality of key grooves matched with the splines.

7. The clutch-integrated direct drive in-wheel motor as claimed in claim 5, wherein: the end face of the inner ring is provided with a limiting ring, and the outer side wall of the limiting ring is in threaded connection with the inner side wall of the linkage ring.

8. The clutch-integrated direct drive in-wheel motor as claimed in claim 2, wherein: the linkage ring is fixedly connected with the rotor through bolts.

9. The clutch-integrated direct drive in-wheel motor as claimed in claim 8, wherein: the linkage ring comprises a positioning ring and a positioning plate arranged on the outer side wall of the positioning ring; the positioning plate is fixedly connected with the rotor through bolts.

10. The clutch-integrated direct drive hub motor as claimed in claim 9, wherein: and the outer side wall of the positioning ring is in contact fit with the inner side wall of the middle hole of the rotor.