CN210469010U

CN210469010U - Electric drive device

Info

Publication number: CN210469010U
Application number: CN201921280270.7U
Authority: CN
Inventors: 夏承钢; 殷建坤; 郭芬芬
Original assignee: Shanghai Zhongke Shenjiang Electric Vehicle Co Ltd
Current assignee: Shanghai Zhongke Shenjiang Electric Vehicle Co Ltd
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2020-05-05
Anticipated expiration: 2029-08-08

Abstract

The utility model discloses an electric drive device, include: the first shell and the second shell are assembled to form a cavity; the input gear is arranged in the cavity; the motor comprises a rotor, a rotor shaft, a stator, a first bearing and a second bearing; the first bearing is arranged on the first shell; the stator is arranged on the first shell, and the rotor is sleeved on the rotor shaft; two ends of the rotor shaft are respectively supported by a first bearing and a second bearing; the input gear and the rotor shaft are respectively provided with end face splines on opposite end faces, and the end face splines are fixedly connected through an axial locking device to transmit the power of the motor. The utility model discloses an electric drive device, rotor shaft and input gear pass through the power that end face spline connects into an organic whole in order to transmit the motor, only utilize first bearing with the second bearing supports, has consequently reduced spare part quantity and simplified the structure to the cost is reduced, and the NVH performance has been improved.

Description

Electric drive device

Technical Field

The utility model relates to a vehicle drive technical field especially relates to an electric drive device's technical field.

Background

The existing electric driving device for new energy vehicles is faced with urgent needs in two aspects, namely, further reducing the system cost, and simultaneously improving the NVH (Noise, Vibration, Harshness) performance to improve the comfort of the whole vehicle. Accordingly, it is also desirable to provide an electric drive device that can reduce cost while improving NVH performance.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned problems, it is an object of the present invention to provide an electric drive device,

in order to realize the purpose, the utility model discloses the technical scheme who takes does:

an electric drive device, comprising:

the first shell and the second shell are assembled to form a cavity; an input gear disposed within the cavity;

the motor comprises a rotor, a rotor shaft, a stator, a first bearing and a second bearing; the first bearing is mounted on the first shell; the stator is arranged on the first shell, and the rotor is sleeved on the rotor shaft; both ends of the rotor shaft are respectively supported by the first bearing and the second bearing;

the input gear and the rotor shaft are respectively provided with end face splines on opposite end faces, and the end face splines are fixedly connected through an axial locking device to transmit the power of the motor.

The axial locking device comprises a locking bolt, a through hole is further formed in the input gear, a threaded hole is further formed in the rotor shaft, and the locking bolt penetrates through the through hole and is screwed into the threaded hole to fixedly connect the input gear and the rotor shaft.

An electric drive device as described above, further comprising an oil seal fitted on said first housing and located between said first bearing and said rotor while being in contact with said rotor shaft.

In an electric drive device as set forth above, the first housing further has a cylindrical portion, and the stator is disposed in the cylindrical portion.

The electric drive device further comprises a third housing, the third housing forms a cooling water channel of the electric motor after being assembled with the first housing, and the second bearing is assembled on the third housing.

An electric drive as above, further comprising a motor controller, wherein the second housing further comprises a box portion, and wherein the motor controller is disposed in the box portion.

The electric driving device further comprises a rotor angle sensor, wherein the rotor angle sensor comprises a sensor rotor and a sensor stator, the sensor rotor is fixedly connected to the input gear, and the sensor stator is fixedly arranged on the second shell.

The utility model discloses owing to adopted above-mentioned technique, make it compare the positive effect that has with prior art and be:

(1) the utility model discloses because rotor shaft and input gear pass through the power of end face splined connection with the transmission motor and only through first bearing with the second bearing supports, has consequently reduced spare part quantity and simplified the structure to the cost is reduced, and the NVH performance has been improved.

Drawings

Fig. 1 is a cross-sectional view of an electric drive device of the present invention;

fig. 2 is a schematic view of an end face spline of the electric drive device of the present invention.

In the drawings: 100. an electric drive; 1. a first housing; 2. a second housing; 11. a cylindrical portion; 12. A cavity; 3. an input gear; 31. a through hole; 3S, inputting a gear end face spline; 4. an electric motor; 41. A rotor; 42. a rotor shaft; 42S, a rotor shaft end face spline; 421. a threaded hole; 43. a stator; 44. A first bearing; 45. a second bearing; 46. a cooling water channel; 5. an axial locking device; 51. locking the bolt; 6. oil sealing; 7. a third housing; 8. a motor controller; 9. a rotor angle sensor; 91. a sensor rotor; 92. a sensor stator.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

Fig. 1 is a cross-sectional view of an electric drive device of the present invention; fig. 2 is a schematic view of an end face spline of the electric drive device of the present invention.

Referring to fig. 1-2, an electric drive 100 is shown, comprising:

the device comprises a first shell 1 and a second shell 2, wherein the first shell 1 and the second shell 2 are assembled to form a cavity 12;

an input gear 3 disposed in the cavity 12;

a motor 4 including a rotor 41, a rotor shaft 42, a stator 43, a first bearing 44, and a second bearing 45; the first bearing 44 is mounted on the first housing 1; the stator 43 is arranged on the first shell 1, and the rotor 41 is sleeved on the rotor shaft 42; both ends of the rotor shaft 42 are supported by a first bearing 44 and a second bearing 45, respectively;

the input gear 3 and the rotor shaft 42 are provided with

face splines

3S and 42S on opposite end faces, respectively, and the

face splines

3S and 42S are fixedly connected by an axial locking device 5 to transmit the power of the motor 4.

Specifically, the input gear face spline 3S and the rotor shaft end face spline 42S are connected by fitting the teeth of the face spline 42S into the corresponding tooth grooves of the face spline 3S, thereby transmitting the power of the motor 4 from the rotor shaft 42 to the input gear 3. Because the end face spline has self-alignment, the input gear 3 can be accurately centered on the rotor shaft 42 through the end face spline connection, so that only two bearings are needed to support the rotor shaft 42, and the end face spline has lower manufacturing cost compared with an inner spline and an outer spline, thereby reducing the number of parts, simplifying the structure, reducing the cost and simultaneously improving the NVH performance.

The above is merely an example of the preferred embodiments of the present invention, and the embodiments and the protection scope of the present invention are not limited thereby.

Further, in a preferred embodiment, the axial locking device 5 includes a locking bolt 51, the input gear 3 is further provided with a through hole 31, the rotor shaft 42 is further provided with a threaded hole 421, and the locking bolt 51 is screwed into the threaded hole 421 through the through hole 31 to tightly couple the input gear 3 and the rotor shaft 42. The locking bolt 51 can enable the input gear 3 and the rotor shaft 42 to be fastened into a whole, and NVH performance is improved. Other types of fastening means are possible and not limited thereto.

Further, in a preferred embodiment, electric drive 100 further includes: and an oil seal 6, the oil seal 6 being fitted on the first housing 1 between the first bearing 44 and the rotor 41 while being in contact with the rotor shaft 42. Where the oil seal 6 is installed so that the first bearing 44 can be lubricated with the lubricating oil in the cavity 12. When the inner and outer races of the first bearing 44 are fixed, the force on the input gear 3 is mainly borne by it, and the second bearing 45 can be grease lubricated and can ensure sufficient life.

Further, in a preferred embodiment, the first housing 1 further has a cylindrical portion 11, and the stator 43 is disposed in the cylindrical portion 11. One part of the first housing 1 is used for forming a housing of a speed reducer or a transmission, and the other part of the first housing also serves as a housing of the stator 43, so that the system integration level and the rigidity are improved, and the NVH performance is favorably improved.

Further, in a preferred embodiment, the electric driving device 100 further includes a third housing 7, the third housing 7 is sleeved on the outer side of the first housing 1, and after the third housing 7 is assembled with the first housing 1, a cooling water channel 46 is formed between the inner wall of the third housing 7 and the outer wall of the first housing 1; the second bearing 45 is fitted on the third housing 7. The system integration level and rigidity are further improved, and the cost is reduced. The third casing 7 may be fitted inside the first casing 1, but is not limited thereto.

Further, in a preferred embodiment, electric drive 100 further includes: motor controller 8, motor controller 8 installs in boxed portion 21, and boxed portion 21 sets up the left side at second casing 2. The system integration level and rigidity are further improved, and the cost is reduced.

Further, in a preferred embodiment, the electric drive 100 further comprises a rotor angle sensor 9, the rotor angle sensor 9 comprises a sensor rotor 91 and a sensor stator 92, the sensor rotor 91 is fixed to the input gear 3, and the sensor stator 92 is fixed to the second housing 2. The rotor angle sensor 9 is installed near the motor controller 8, so that the wiring harness is shortened, and the cost is reduced.

The above description is only an example of the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and those skilled in the art should be able to realize the equivalent alternatives and obvious variations of the present invention.

Claims

1. An electric drive device, comprising: the first shell and the second shell are assembled to form a cavity; an input gear disposed within the cavity;

2. The electric drive device of claim 1, wherein the axial locking device comprises a locking bolt, the input gear further comprises a through hole, the rotor shaft further comprises a threaded hole, and the locking bolt is screwed into the threaded hole through the through hole to tightly connect the input gear and the rotor shaft.

3. The electric drive of claim 1 further comprising an oil seal mounted on said first housing between said first bearing and said rotor while in contact with said rotor shaft.

4. The electric drive of claim 1 wherein said first housing further has a cylindrical portion, said stator being disposed within said cylindrical portion.

5. The electric drive of claim 4 further comprising a third housing forming a cooling water channel for said electric motor when assembled with said first housing, and wherein said second bearing is assembled to said third housing.

6. The electric drive of claim 5 further comprising a motor controller, the second housing further comprising a box portion, the motor controller disposed within the box portion.

7. The electric drive of claim 6 further comprising a rotor angle sensor including a sensor rotor and a sensor stator, said sensor rotor being fixedly attached to said input gear and said sensor stator being fixedly attached to said second housing.