CN212765499U - Coaxial three-stage speed reduction electric drive axle - Google Patents
Coaxial three-stage speed reduction electric drive axle Download PDFInfo
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- CN212765499U CN212765499U CN202020687289.XU CN202020687289U CN212765499U CN 212765499 U CN212765499 U CN 212765499U CN 202020687289 U CN202020687289 U CN 202020687289U CN 212765499 U CN212765499 U CN 212765499U
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Abstract
The utility model relates to an electric automobile technical field, especially a tertiary speed reduction electric drive axle of coaxial-type, including motor, tertiary reduction gear, differential mechanism, semi-axis and the wheel that power connects in proper order, the coaxial setting of motor and semi-axis still holds tertiary reduction gear and differential mechanism's integrated casing including the motor casing that is used for holding the motor respectively, bears the frame with the wheel bearing rigid coupling, and semi-axis and motor all set up and bear the frame outside. The output shaft of the motor is coaxial with the axis of the half shaft, the structure is compact, and the occupied space is small; adopt non-axle mounting means, motor and semi-axis do not set up in the axle housing, are convenient for assemble and later maintenance dismantlement, and the axle design is simplified.
Description
Technical Field
The utility model relates to an electric automobile technical field, especially a tertiary speed reduction electric drive axle of coaxial-type.
Background
The electric vehicle is used as an environment-friendly transportation tool without emission, pollution and energy consumption, people have widely accepted, popularized and used, more and more scientific research institutions, universities and enterprises increase the investment on pure electric vehicles, the novel pure electric vehicle mainly adopts electric transmission, compared with the traditional mechanical transmission, the electric transmission has many advantages, such as optimizing the structural arrangement of the whole vehicle, realizing stepless speed change and improving the power performance and the economic performance of the whole vehicle, but because of the limitation of a motor and a control technology thereof, the pure electric vehicle can not exert the advantages to the maximum, and the problems of excessively wide motor rotating speed range, poor differential control effect and the like are increasingly prominent. The transmission mode of the motor is small in gear ratio, the variable speed output of the motor cannot be well realized, the working strength of the motor is increased, the transmission mode is not stable in operation, and the motor cannot be well adapted to high-speed operation of the motor.
Therefore, the electric drive axle with a speed reducer and a differential mechanism is provided in the prior art, the above problems are solved, chinese patent CN208021190U discloses a horizontal integrated three-stage speed reduction electric drive axle, which comprises an axle housing, differential mechanism and half shaft are arranged in the axle housing, the half shaft is connected with a hub, the hub is provided with a hydraulic brake and a hand brake parking brake, and the electric drive axle further comprises a drive motor, the drive motor transmits power to a three-gear main speed reducer through a power input shaft, the three-gear main speed reducer is connected with the differential mechanism, the differential mechanism is connected with the half shaft, and the half shaft drives the hub to rotate. This structure is tertiary speed reduction electric drive axle, can realize big velocity ratio deceleration, but this structure still has some not enoughly, and this structure is only integrated together tertiary reduction gear, and differential mechanism sets up inside the axle housing, and motor drive shaft need set up alone, occupy great extra space, and the integrated level is still not high, and the volume that has caused the transaxle is great, and it is great to require with whole car matching space, and the suitability is relatively poor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a coaxial three-stage speed reduction electric drive axle, the axes of a motor and a half shaft are coaxial, the structure is compact, and the occupied space is small; adopt non-axle mounting means, motor and semi-axis do not set up in the axle housing, are convenient for assemble and later maintenance dismantlement, and the axle design is simplified.
The technical scheme of the utility model as follows:
a coaxial three-stage speed reduction electric drive axle comprises a motor, a three-stage speed reducer, a differential, a half shaft and wheels which are in power connection in sequence; the three-stage speed reducer comprises a first-stage driving gear, a first-stage driven gear meshed with the first-stage driving gear, a second-stage driving gear coaxially connected with the first-stage driven gear, a second-stage driven gear meshed with the second-stage driving gear, a third-stage driving gear coaxially connected with the second-stage driven gear, and a third-stage driven gear meshed with the third-stage driving gear, wherein the first-stage driving gear is connected with the motor, and the third-stage driven gear is connected with the differential mechanism; the utility model discloses a tertiary speed reduction realizes big velocity ratio speed reduction, and great output power is realized to the increase moment of torsion.
The output shaft of the motor and the half shaft are coaxially arranged; namely, the motor output shaft of the motor is rotatably sleeved on the half shaft, the structure is compact, the occupied space for installation is small, and the adaptability of the whole vehicle is good.
The utility model discloses still including being used for holding respectively the motor casing of motor hold tertiary reduction gear with differential mechanism's integrated casing, integrated casing is casting shaping structure as an organic whole, and the integrated level is high, and whole car matches space suitability good.
The utility model also comprises a bearing frame fixedly connected with the wheel bearing; half shaft and motor all set up bear the frame outside, adopt non-axle mounting means, motor and half shaft do not set up in the axle housing, are convenient for assemble and later maintenance dismantlement, and the axle design is simplified.
Preferably, the axes of the first-stage driving gear, the second-stage driving gear and the third-stage driving gear are all parallel to each other, the structure is simple, and the cost is low.
Preferably, the motor and the differential are respectively positioned on two sides of the three-level speed reducer, the three components are reasonably arranged, the weight distribution of the left side and the right side is uniform, and the structure is compact.
Preferably, the motor casing with integrated casing mutual independence sets up, because motor and semi-axis coaxial setting, the structure is complicated, the independent maintenance dismouting in the motor later stage of being convenient for.
Preferably, the differential mechanism is a bevel gear differential mechanism, the traditional differential mechanism is used, the structure is compact, the technology is mature, the manufacturing and the installation are simple, the universalization degree of parts is high, and the differential mechanism is suitable for low-speed heavy-load conditions.
The utility model has the advantages that:
1. the output shaft of the motor and the half shaft are coaxially arranged, so that the structure is compact, and the occupied space is small.
2. Adopt non-axle mounting means, motor and semi-axis do not set up in the axle housing, and the assembly of being convenient for is dismantled with later maintenance, and the axle design is simplified, and the structural arrangement who bears the frame promotes power take off stability and bearing capacity.
3. The three-level speed reducer shell and the differential shell are of an integrated structure, the integration level is high, and the adaptability of the matching space of the whole vehicle is good.
Drawings
Fig. 1 is a structural schematic diagram of a coaxial three-stage speed reduction electric drive axle of the present invention.
Fig. 2 is a structural diagram of the non-shaft mounting method of the present invention.
In the figure: 1-motor, 2-differential, 3-three-stage speed reducer, 301-first driving gear, 302-first driven gear, 303-second driving gear, 304-second driven gear, 305-third driving gear, 306-third driven gear, 4-motor shell, 5-integrated shell, 6-half shaft, 7-wheel and 8-bearing frame.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Example 1:
as shown in fig. 1, a coaxial three-stage speed reduction electric drive axle comprises a motor 1, a three-stage speed reducer 3, a differential 2, a half shaft 6 and wheels 7 which are in power connection in sequence; the third reduction gear 3 includes one-level driving gear 301, and one-level driven gear 302 of one-level driving gear 301 meshing, and one-level driven gear 302 coaxial coupling's second grade driving gear 303, and second grade driven gear 304 of second grade driving gear 303 meshing, and second grade driven gear 304 coaxial coupling's tertiary driving gear 305, and tertiary driven gear 306 of tertiary driving gear 305 meshing, one-level driving gear 301 with motor 1 connects, tertiary driven gear 306 with differential 2 connects, its characterized in that: the output shaft of the motor 1 and the half shaft 6 are coaxially arranged; the device also comprises a motor shell 4 for accommodating the motor 1, an integrated shell 5 for accommodating the three-stage speed reducer 3 and the differential 2, and a bearing frame 8 fixedly connected with a wheel 7 bearing; the half-shaft 6 and the electric machine 1 are both arranged outside the carrier 8.
The utility model discloses a power transmission route as follows:
power transmission path: the power output by the motor 1 is transmitted to wheels 7 on the left and right sides by the differential 2 through the speed reduction and torque increase of the three-level parallel reduction gear set in the three-level speed reducer 3.
Example 2:
as shown in fig. 1, a coaxial three-stage speed reduction electric drive axle comprises a motor 1, a three-stage speed reducer 3, a differential 2, a half shaft 6 and wheels 7 which are in power connection in sequence; the three-stage speed reducer 3 comprises a first-stage driving gear 301, a first-stage driven gear 302 meshed with the first-stage driving gear 301, a second-stage driving gear 303 coaxially connected with the first-stage driven gear 302, a second-stage driven gear 304 meshed with the second-stage driving gear 303, a third-stage driving gear 305 coaxially connected with the second-stage driven gear 304, and a third-stage driven gear 306 meshed with the third-stage driving gear 305, wherein the first-stage driving gear 301 is connected with the motor 1, and the third-stage driven gear 306 is connected with the differential 2; the embodiment adopts three-level parallel deceleration, realizes large-speed-ratio deceleration, increases torque and realizes larger output force.
The output shaft of the motor 1 and the half shaft 6 are coaxially arranged; namely, the motor output shaft of the motor 1 is rotatably sleeved on the half shaft 6, the structure is compact, and the occupied space is small.
This embodiment still including being used for holding respectively motor 1's motor casing 4 holds tertiary reduction gear 3 with differential mechanism 2's integrated housing 5, integrated housing 5 is the casting shaping structure of an organic whole, and the integrated level is high, and whole car matches the space suitability good.
As shown in fig. 2, the present embodiment further includes a carrier 8 fixedly connected with the wheel 7 bearing; half shaft 6 and motor 1 all set up bear 8 outsides, adopt non-axle mounting means promptly, and motor 1 and half shaft 6 do not set up in the axle housing, are convenient for assemble and later maintenance dismantles, and the axle design is simplified.
The axes of the first-stage driving gear 301, the second-stage driving gear 303 and the third-stage driving gear 305 are all parallel to each other, the structure is simple, and the cost is low.
The motor 1 and the differential mechanism 2 are respectively positioned on two sides of the three-level speed reducer 3, the three components are reasonably arranged, the weight distribution on the left side and the right side is uniform, and the structure is compact.
The motor casing 4 with 5 mutual independence of integrated casing set up, the maintenance dismouting of the later stage of being convenient for.
The differential 2 is a bevel gear differential, namely a common differential, and consists of parts such as a planetary gear, a planetary gear carrier, a half axle gear and the like. Power enters the differential mechanism 2 to directly drive the planet wheel carrier, and then the planet wheels drive the left half shaft 6 and the right half shaft 6 to respectively drive the wheels 7 on the left side and the right side. The differential mechanism has the advantages of compact structure, mature technology, simple manufacture and installation, high part generalization degree and suitability for low-speed heavy-load conditions.
Claims (4)
1. A coaxial three-stage speed reduction electric drive axle comprises a motor (1), a three-stage speed reducer (3), a differential (2), a half shaft (6) and wheels (7) which are in power connection in sequence; three reduction gear (3) include one-level driving gear (301), and one-level driven gear (302) of one-level driving gear (301) meshing, and one-level driven gear (302) coaxial coupling's second grade driving gear (303), and second grade driven gear (304) of second grade driving gear (303) coaxial coupling, and third grade driving gear (305) of third grade driving gear (305) meshing, and third grade driven gear (306), one-level driving gear (301) with motor (1) is connected, third grade driven gear (306) with differential mechanism (2) are connected, its characterized in that: the output shaft of the motor (1) and the half shaft (6) are coaxially arranged; the device also comprises a motor shell (4) used for accommodating the motor (1), an integrated shell (5) used for accommodating the three-level speed reducer (3) and the differential (2), and a bearing frame (8) fixedly connected with a wheel (7) bearing; the half shaft (6) and the motor (1) are arranged outside the bearing frame (8).
2. A coaxial three-stage speed-reducing electric drive axle according to claim 1, wherein: the axes of the first-stage driving gear (301), the second-stage driving gear (303) and the third-stage driving gear (305) are all parallel to each other.
3. A coaxial three-stage reduction electric drive axle according to claim 1 or 2, wherein: the motor shell (4) and the integrated shell (5) are arranged independently.
4. A coaxial three-stage reduction electric drive axle according to claim 1 or 2, wherein: the differential (2) is a bevel gear differential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020687289.XU CN212765499U (en) | 2020-04-29 | 2020-04-29 | Coaxial three-stage speed reduction electric drive axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020687289.XU CN212765499U (en) | 2020-04-29 | 2020-04-29 | Coaxial three-stage speed reduction electric drive axle |
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| Publication Number | Publication Date |
|---|---|
| CN212765499U true CN212765499U (en) | 2021-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020687289.XU Active CN212765499U (en) | 2020-04-29 | 2020-04-29 | Coaxial three-stage speed reduction electric drive axle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113910879A (en) * | 2021-11-24 | 2022-01-11 | 中国重汽集团济南动力有限公司 | Two-gear electric drive axle based on clutch coupling |
| CN113910881A (en) * | 2021-11-24 | 2022-01-11 | 中国重汽集团济南动力有限公司 | Electric drive axle based on clutch planet shifts |
-
2020
- 2020-04-29 CN CN202020687289.XU patent/CN212765499U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113910879A (en) * | 2021-11-24 | 2022-01-11 | 中国重汽集团济南动力有限公司 | Two-gear electric drive axle based on clutch coupling |
| CN113910881A (en) * | 2021-11-24 | 2022-01-11 | 中国重汽集团济南动力有限公司 | Electric drive axle based on clutch planet shifts |
| CN113910881B (en) * | 2021-11-24 | 2023-12-12 | 中国重汽集团济南动力有限公司 | Electric drive axle based on clutch planet gear shifting |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220914 Address after: No. 9, Keyuan East 11th Road, High-tech Zone, Nanning City, Guangxi Zhuang Autonomous Region, 530009 Patentee after: Yuchaixinlan New Energy Power Technology Co.,Ltd. Address before: 537005 No. 88 flyover West Road, the Guangxi Zhuang Autonomous Region, Yulin Patentee before: Guangxi Yuchai Machinery Co.,Ltd. |
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| TR01 | Transfer of patent right |