CN210469024U - Electric drive device - Google Patents

Electric drive device Download PDF

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Publication number
CN210469024U
CN210469024U CN201921280279.8U CN201921280279U CN210469024U CN 210469024 U CN210469024 U CN 210469024U CN 201921280279 U CN201921280279 U CN 201921280279U CN 210469024 U CN210469024 U CN 210469024U
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CN
China
Prior art keywords
rotor
input gear
bearing
shaft
electric drive
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Active
Application number
CN201921280279.8U
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Chinese (zh)
Inventor
夏承钢
殷建坤
郭芬芬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Zhongke Shenjiang Electric Vehicle Co Ltd
Original Assignee
Shanghai Zhongke Shenjiang Electric Vehicle Co Ltd
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Application filed by Shanghai Zhongke Shenjiang Electric Vehicle Co Ltd filed Critical Shanghai Zhongke Shenjiang Electric Vehicle Co Ltd
Priority to CN201921280279.8U priority Critical patent/CN210469024U/en
Application granted granted Critical
Publication of CN210469024U publication Critical patent/CN210469024U/en
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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 shaft is arranged in the cavity; a first bearing installed on the first housing and supporting the input gear shaft; a motor including a rotor, a rotor shaft, a stator, and a second bearing; the stator is arranged on the first shell, and the rotor is sleeved on the rotor shaft; one end of the rotor shaft is supported by the second bearing; the input gear shaft and the rotor shaft are respectively provided with end face splines on opposite end faces and are connected through the end face splines to transmit the power of the motor. The utility model discloses an electric drive device, rotor shaft and input gear axle 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.

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
To the problem of above-mentioned production, the utility model aims to provide a reduce cost improves electric drive arrangement of NVH performance simultaneously.
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 shaft disposed within the cavity; a first bearing mounted on the first housing and supporting the input gear shaft;
a motor including a rotor, a rotor shaft, a stator, and a second bearing; the stator is arranged on the first shell, and the rotor is sleeved on the rotor shaft; one end of the rotor shaft is supported by the second bearing;
the input gear shaft and the rotor shaft are respectively provided with end face splines on opposite end faces and are connected through the end face splines to transmit the power of the motor.
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 input gear shaft.
In an electric drive device of the above type, the input gear shaft has an inner race shaft section on which the balls of the first bearing roll.
The electric driving device further comprises a locking bolt, a through hole is formed in the input gear shaft, a threaded hole is 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 shaft and the 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 shaft, 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:
the utility model discloses because rotor shaft and input gear axle 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 shaft; 3S, inputting a gear shaft end face spline; 31. an inner ring shaft section; 32. locking the bolt; 33. a through hole; 4. a first bearing; 41. a ball bearing; 5. an electric motor; 51. a rotor; 52. a rotor shaft; 521. a threaded hole; 52S, rotor shaft end face splines; 53. a stator; 54. a second bearing; 55. A cooling water channel; 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 shaft 3 installed in the cavity 12; a first bearing 4 mounted on the first housing 1 and supporting the input gear shaft 3;
a motor 5 including a rotor 51, a rotor shaft 52, a stator 53, and a second bearing 54; the stator 53 is arranged on the first shell 1, and the rotor 51 is sleeved on the rotor shaft 52; one end of the rotor shaft 52 is supported by the second bearing 54;
the input gear shaft 3 and the rotor shaft 52 are provided with face splines 3S and 52S on opposite end faces, respectively, and are connected by the face splines 3S and 52S to transmit the power of the motor 5.
Specifically, the input gear shaft end face spline 3S and the rotor shaft end face spline 52S are connected by fitting the teeth of the end face spline 52S into the corresponding tooth grooves of the end face spline 3S, thereby transmitting the power of the motor 5 from the rotor shaft 52 to the input gear shaft 3. Because the end face spline has self-alignment, two shafts connected through the end face spline only need two bearings to support, and the end face spline is lower in manufacturing cost compared with an inner spline and an outer spline, the number of parts can be reduced, the structure is simplified, the cost is reduced, and the NVH performance is improved.
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, 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 4 and the rotor 51 while being in contact with the input gear shaft 3. Where the oil seal 6 is installed so that the first bearing 4 can be lubricated by the lubricating oil in the cavity 12. When the inner and outer races of the first bearing 4 are fixed, the force applied to the input gear shaft 3 is mainly borne by it, and the second bearing 54 can be a grease-lubricated bearing, and can ensure a sufficient life.
Further, in a preferred embodiment, the input gear shaft 3 has an inner race shaft section 31, and the balls 41 of the first bearing 4 roll on the inner race shaft section 31. That is, the input gear shaft 3 and the first bearing 4 can be integrated into one component, so that the structure is further simplified, and the inner diameter of the bearing can be reduced, thereby meeting the requirement of higher rotating speed.
Further, in a preferred embodiment, the electric drive device 100 further includes a locking bolt 32, the input gear shaft 3 is further provided with a through hole 33, the rotor shaft 52 is further provided with a threaded hole 521, and the locking bolt 32 is screwed into the threaded hole 521 through the through hole 33 to tightly connect the input gear shaft 3 and the rotor shaft 52. The lock bolt 32 can fasten the input gear shaft 3 and the rotor shaft 52 into a whole, and the NVH performance is improved. Other types of fastening means are possible and not limited thereto.
Further, in a preferred embodiment, the first housing 1 also has a cylindrical portion 11, and the stator 53 is disposed within the cylindrical portion 11. One part of the first housing 1 is used to form a housing of a reduction gear or transmission, and the other part also serves as a housing of the stator 52Shell bodyThe 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 55 is formed between the inner wall of the third housing 7 and the outer wall of the first housing 1; the second bearing 54 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 device 100 further includes a rotor angle sensor 9, the rotor angle sensor 9 includes a sensor rotor 91 and a sensor stator 92, the sensor rotor 91 is fixedly connected to the input gear shaft 3, and the sensor stator 92 is fixedly connected 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 (8)

1. An electric drive device, comprising: the first shell and the second shell are assembled to form a cavity; an input gear shaft disposed within the cavity; a first bearing mounted on the first housing and supporting the input gear shaft;
a motor including a rotor, a rotor shaft, a stator, and a second bearing; the stator is arranged on the first shell, and the rotor is sleeved on the rotor shaft; one end of the rotor shaft is supported by the second bearing;
the input gear shaft and the rotor shaft are respectively provided with end face splines on opposite end faces and are connected through the end face splines to transmit the power of the motor.
2. 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 input gear shaft.
3. The electric drive of claim 1 wherein said input gear shaft has an inner race shaft section on which the balls of said first bearing roll.
4. The electric drive device of claim 1, further comprising a locking bolt, wherein a through hole is formed in the input gear shaft, a threaded hole is formed in the rotor shaft, and the locking bolt is screwed into the threaded hole through the through hole to tightly connect the input gear shaft and the rotor shaft.
5. The electric drive of claim 1 wherein said first housing further has a cylindrical portion, said stator being disposed within said cylindrical portion.
6. The electric drive of claim 5 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.
7. 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.
8. The electric drive of claim 7 further comprising a rotor angle sensor including a sensor rotor and a sensor stator, said sensor rotor being fixedly attached to said input gear shaft, said sensor stator being fixedly attached to said second housing.
CN201921280279.8U 2019-08-08 2019-08-08 Electric drive device Active CN210469024U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921280279.8U CN210469024U (en) 2019-08-08 2019-08-08 Electric drive device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921280279.8U CN210469024U (en) 2019-08-08 2019-08-08 Electric drive device

Publications (1)

Publication Number Publication Date
CN210469024U true CN210469024U (en) 2020-05-05

Family

ID=70450634

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921280279.8U Active CN210469024U (en) 2019-08-08 2019-08-08 Electric drive device

Country Status (1)

Country Link
CN (1) CN210469024U (en)

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