CN111469605A - Integrated three-stage speed reduction electric drive axle - Google Patents
Integrated three-stage speed reduction electric drive axle Download PDFInfo
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- CN111469605A CN111469605A CN202010354845.6A CN202010354845A CN111469605A CN 111469605 A CN111469605 A CN 111469605A CN 202010354845 A CN202010354845 A CN 202010354845A CN 111469605 A CN111469605 A CN 111469605A
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- driving wheel
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
- B60B35/121—Power-transmission from drive shaft to hub
- B60B35/122—Power-transmission from drive shaft to hub using gearings
- B60B35/125—Power-transmission from drive shaft to hub using gearings of the planetary type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
- B60B35/14—Torque-transmitting axles composite or split, e.g. half- axles; Couplings between axle parts or sections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
- B60B35/16—Axle housings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/12—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of electric gearing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
- B60K17/165—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing provided between independent half axles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Retarders (AREA)
- Motor Power Transmission Devices (AREA)
Abstract
The invention relates to the technical field of electric automobiles, in particular to an integrated three-level speed reduction electric drive axle which comprises an integrated shell, wherein a motor, a three-level parallel speed reduction gear set and a differential mechanism which are sequentially connected in a transmission manner are arranged in the integrated shell, and the integrated shell is of an integrally formed structure; the integrated shell comprises an integrated shell, and is characterized by further comprising an axle housing, half shafts and wheels, wherein the axle housing is connected to two sides of the integrated shell, the half shafts are arranged inside the axle housing, one ends of the half shafts are connected with the output end of the differential mechanism, and the wheels are connected to the other ends of the half shafts. The system has high integration level, compact structure, small occupied space, no need of a transmission shaft, good adaptability with the whole vehicle and simple assembly process, and the battery pack can be arranged in the middle of the vehicle girder.
Description
Technical Field
The invention relates to the technical field of electric automobiles, in particular to an integrated three-level speed reduction electric drive axle.
Background
With the increasing exhaustion of petroleum resources and the aggravation of air pollution, the pure electric vehicle is used as a future vehicle development direction capable of relieving energy problems and environmental problems, more and more scientific research institutions, universities and enterprises increase the investment on the pure electric vehicle, the novel pure electric vehicle mainly adopts electric drive, compared with the traditional internal combustion engine drive, the electric drive has many advantages, such as whole vehicle structure arrangement, stepless speed change and improvement of the power performance and the economic performance of the whole vehicle, but due to 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 the 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 reduction gear and differential mechanism has been proposed among the prior art to solve above-mentioned problem, chinese patent CN208021190U discloses a three level speed reduction electric drive axle of horizontal integrated form, including the axle housing, be equipped with differential mechanism, semi-axis in the axle housing, semi-axis hub connection, wheel hub is equipped with hydraulic brake, manual brake parking brake, still includes driving motor, driving motor passes through the power input shaft and transmits power to three fender final drive, three fender final drive connects differential mechanism, the semi-axis is connected to the differential mechanism, the semi-axis drives wheel hub rotation. 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, but the integrated level is still not high, and the motor casing still needs the erection joint between differential mechanism shell and the speed reducer shell, and the structure is complicated, and the volume that has caused the transaxle is great, and it is great with whole car matching space requirement, and the suitability is not good.
Disclosure of Invention
The invention provides an integrated three-stage speed reduction electric drive axle, which integrates a motor shell, a differential shell and a speed reducer shell into a whole, has high system integration level, compact structure, small occupied space and no need of a transmission shaft, can arrange a battery pack in the middle of a vehicle girder, has good adaptability with a whole vehicle, and is simple in assembly process.
The frame is an automobile upper part, namely a frame type structure bridged on front and rear axles of an automobile, and is commonly called a crossbeam.
An integrated three-level speed reduction electric drive axle comprises an integrated shell, wherein a motor, a three-level parallel speed reduction gear set and a differential mechanism which are sequentially connected in a transmission manner are arranged in the integrated shell, and the integrated shell is of an integrally formed structure and can be of an integrally cast structure; still include axle housing, semi-axis and wheel, axle housing, semi-axis and wheel all set up in pairs in differential mechanism's both sides, the axle housing just is located with connected to the frame the both sides of integrated casing, the semi-axis sets up inside the axle housing, the one end of semi-axis with differential mechanism's output is connected and the other end is connected the wheel. The motor shell, the speed reducer shell and the differential shell are integrally arranged on the integrated shell, so that the assembling process is simpler, the size is smaller, and the adaptability of the whole vehicle is better. Adopt the axle mounting means, promptly the semi-axis sets up inside the axle housing, carry out better protection to spare part, the reliability is higher.
Preferably, the three-stage parallel reduction gear set further comprises a first-stage driving wheel coaxially connected with a motor output shaft of the motor, a first-stage driven wheel meshed with the first-stage driving wheel, a second-stage driving wheel coaxially connected with the first-stage driven wheel, a second-stage driven wheel meshed with the second-stage driving wheel, a third-stage driving wheel coaxially connected with the second-stage driven wheel, and a third-stage driven wheel meshed with the third-stage driving wheel; the three-stage driven wheel is connected with the shell of the differential, and the axes of the motor output shaft, the second-stage driving wheel, the third-stage driving wheel and the half shaft are arranged in parallel. By adopting a three-stage parallel speed reduction mode, the motor can use about 15000rpm at present, the motor is light in weight and high in power density, the high-speed-ratio speed reduction of the high-speed motor can be realized, the torque is increased, and the larger output force is realized. The ratio of motor work in the high-efficient district can be bigger among this technical scheme, and whole car energy consumption can further reduce, and this is that wheel limit motor and in-wheel motor all are difficult to realize.
Preferably, the axle housing is of a tubular structure, and the axle housing is connected with the integrated housing through bolts. Simple structure, processing low in manufacturing cost, the installation of axle housing is simple, is convenient for dismantle the maintenance.
Preferably, the differential is a bevel gear differential, comprises a planetary bevel gear, a planet gear carrier and a half-shaft bevel gear, adopts a common differential structure, and is compact in structure, mature in technology, simple in manufacturing and installation, high in component generalization degree and suitable for low-speed heavy-load conditions.
The invention has the beneficial effects that:
1. the motor shell, the speed reducer shell and the differential shell are integrated into a whole by the integrated shell, so that the assembling process is simpler, the size is smaller, and the adaptability of the whole vehicle is better; the weight and the number of parts of the whole vehicle are reduced, and the cost of the whole vehicle is reduced after large-scale production
2. The three-stage parallel speed reduction mode is adopted, a high-rotating-speed motor can be adopted, the motor is light in weight and high in power density, the high-speed-ratio speed reduction of the high-rotating-speed motor can be realized, the torque is increased, and the larger torque output is realized.
3. The transmission shaft is not needed, the battery pack can be arranged in the middle of a crossbeam of the vehicle, and the adaptability of the whole vehicle is better.
4. Adopt the axle mounting means, the semi-axis setting is in promptly inside the axle housing, carry out better protection to semi-axis assembly and annex, the reliability is higher.
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.
Drawings
Fig. 1 is a schematic structural diagram of an integrated three-stage deceleration electric drive axle according to the present invention.
Fig. 2 is a schematic view of the structural principle of the three-stage parallel reduction gear set according to the present invention.
In the figure: 1-integrated shell, 101-motor shell, 102-speed reducer shell, 103-differential shell, 2-motor, 201-motor output shaft, 3-three-stage parallel reduction gear set, 301-primary driving wheel, 302-primary driven wheel, 303-secondary driving wheel, 304-secondary driven wheel, 305-tertiary driving wheel, 306-tertiary driven wheel, 4-differential, 5-axle housing, 6-half axle and 7-wheel.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example 1:
as shown in fig. 1, an integrated three-stage speed reduction electric drive axle comprises an integrated housing 1, wherein a motor 2, a three-stage parallel speed reduction gear set 3 and a differential 4 which are sequentially connected in a transmission manner are arranged in the integrated housing 1, and the integrated housing 1 is of an integrally formed structure; still include axle housing 5, semi-axis 6 and wheel 7, axle housing 5 just is located with the connected to the frame the both sides of integrated casing 1, semi-axis 6 sets up inside axle housing 5, semi-axis 6 one end with differential mechanism 4's output is connected and the other end is connected wheel 7.
The working principle of the embodiment is as follows:
power transmission path: the power is output by the motor 2, and is transmitted to half shafts 6 on the left side and the right side by the differential mechanism 4 through the speed reduction and torque increasing effects of the three-level parallel reduction gear set 3, and the half shafts 6 transmit the power to wheels 7 on the left side and the right side.
Example 2:
as shown in fig. 1, an integrated three-stage speed reduction electric drive axle comprises an integrated housing 1, wherein a motor 2, a three-stage parallel speed reduction gear set 3 and a differential 4 which are sequentially connected in a transmission manner are arranged in the integrated housing 1, and the integrated housing 1 is of an integrally cast structure, i.e., the integrated housing 1 integrates a motor housing 101, a speed reducer housing 102 and a differential housing 103; still include axle housing 5, semi-axis 6 and wheel 7, axle housing 5, semi-axis 6 and wheel 7 all set up in pairs in differential mechanism 4's both sides, and integrated casing 1 is connected with axle housing 5 on the left side, axle housing 5 on the right respectively as the middle part of axle, axle housing 5 just is located with the frame connection integrated casing 1's both sides, semi-axis 6 sets up 5 inside of axle housing, semi-axis 6 one end with differential mechanism 4's output is connected and the other end is connected wheel 7. The integrated shell 1 integrates the motor shell 101, the speed reducer shell 102 and the differential shell 103 into a whole, so that the assembly process is simpler, the size is smaller, and the adaptability of the whole vehicle is better.
As shown in fig. 2, the specific structure of the three-stage parallel reduction gear set 3 is as follows: the three-stage parallel reduction gear set 3 further comprises a first-stage driving wheel 301 coaxially connected with a motor output shaft 201 of the motor 2, namely the motor output shaft 201 and the first-stage driving wheel 301 are coaxially mounted, a first-stage driven wheel 302 meshed and connected with the first-stage driving wheel 301, a second-stage driving wheel 303 coaxially connected with the first-stage driven wheel 302, namely the first-stage driven wheel 302 and the second-stage driving wheel 303 are coaxially mounted, a second-stage driven wheel 304 meshed and connected with the second-stage driving wheel 303, a third-stage driving wheel 305 coaxially connected with the second-stage driven wheel 304, the second-stage driven wheel 304 and the third-stage driving wheel 305 are coaxially mounted, and a third-stage driven wheel 306 meshed and connected with the third; the third-stage driven wheel 306 is connected with the shell of the differential 4, and the axes of the motor output shaft 201, the second-stage driving wheel 303, the third-stage driving wheel 305 and the half shaft 6 are arranged in parallel. By adopting a three-stage parallel speed reduction mode, the motor 2 at about 15000rpm can be used at present, the motor 2 is light in weight and high in power density, the speed reduction of the motor 2 with high rotating speed and large speed ratio can be realized, the torque is increased, and the larger output force is realized. The ratio of motor 2 work in the high-efficient district among this technical scheme can be bigger, and whole car energy consumption can further reduce, and this is that wheel limit motor and in-wheel motor all are difficult to realize.
The axle housing 5 is of a tubular structure, and the axle housing 5 is connected with the integrated shell 1 through bolts. Simple structure, processing low in manufacturing cost, the installation of axle housing 5 is simple, is convenient for dismantle the maintenance.
As shown in fig. 1, the differential 4 is a bevel gear differential, which comprises a planetary bevel gear, a planetary carrier and a half-shaft bevel gear, and has the advantages of compact structure, mature technology, simple manufacture and installation, high component generalization degree, and suitability for low-speed heavy-load conditions.
The present invention is described above by way of example with reference to the accompanying drawings, and it is to be understood that the specific implementations of the present invention are not limited to the above-described embodiments. Those skilled in the art can make various modifications or alterations to the present invention without departing from the technical idea of the present invention, and such modifications or alterations also fall within the protective scope of the present invention.
Claims (4)
1. An integrated form tertiary speed reduction electric drive axle which characterized in that: the gear box comprises an integrated shell (1), wherein a motor (2), a three-stage parallel reduction gear set (3) and a differential (4) which are sequentially connected in a transmission manner are arranged in the integrated shell (1), and the integrated shell (1) is of an integrally formed structure; still include axle housing (5), semi-axis (6) and wheel (7), axle housing (5) are connected with the frame and are located the both sides of integrated casing (1), semi-axis (6) set up inside axle housing (5), the one end of semi-axis (6) with the output of differential mechanism (4) is connected and the other end is connected wheel (7).
2. An integrated three-stage retarding electric drive axle according to claim 1, wherein: the three-level parallel reduction gear set (3) comprises a first-level driving wheel (301) coaxially connected with a motor output shaft (201) of the motor (2), a first-level driven wheel (302) meshed and connected with the first-level driving wheel (301), a second-level driving wheel (303) coaxially connected with the first-level driven wheel (302), a second-level driven wheel (304) meshed and connected with the second-level driving wheel (303), a third-level driving wheel (305) coaxially connected with the second-level driven wheel (304), and a third-level driven wheel (306) meshed and connected with the third-level driving wheel (305); the three-stage driven wheel (306) is connected with the shell of the differential (4), and the axes of the motor output shaft (201), the second-stage driving wheel (303), the three-stage driving wheel (305) and the half shaft (6) are arranged in parallel.
3. An integrated three-stage decelerating electric drive axle according to claim 1 or 2, wherein: axle housing (5) are tubular structure, axle housing (5) with integrated casing (1) bolted connection.
4. An integrated three-stage decelerating electric drive axle according to claim 1 or 2, wherein: the differential (4) is a bevel gear differential, and comprises a planetary bevel gear, a planetary gear carrier and a half shaft bevel gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010354845.6A CN111469605A (en) | 2020-04-29 | 2020-04-29 | Integrated three-stage speed reduction electric drive axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010354845.6A CN111469605A (en) | 2020-04-29 | 2020-04-29 | Integrated three-stage speed reduction electric drive axle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111469605A true CN111469605A (en) | 2020-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010354845.6A Pending CN111469605A (en) | 2020-04-29 | 2020-04-29 | Integrated three-stage speed reduction electric drive axle |
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| CN (1) | CN111469605A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111976470A (en) * | 2020-08-27 | 2020-11-24 | 安徽维德电源有限公司 | Integrated power system of liquid cooling type electric forklift and control method thereof |
| CN111976469A (en) * | 2020-08-27 | 2020-11-24 | 安徽维德电源有限公司 | Integrated power system of liquid cooling type electric forklift and forklift |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205022296U (en) * | 2015-09-15 | 2016-02-10 | 韶能集团韶关宏大齿轮有限公司 | With motor and planet gear and coaxial integrated electric drive bridge of differential mechanism |
| CN105790500A (en) * | 2016-04-23 | 2016-07-20 | 中国第汽车股份有限公司 | Integrated driving device for electric vehicle |
| CN107298014A (en) * | 2017-07-04 | 2017-10-27 | 合肥盎然车桥有限公司 | A kind of motor drive axle |
| CN207241396U (en) * | 2017-09-07 | 2018-04-17 | 中国第一汽车股份有限公司 | Longitudinal integrated form drive axle after motor |
| CN208021190U (en) * | 2018-03-30 | 2018-10-30 | 青岛亚荣科技有限公司 | A kind of horizontal integrated three-stage deceleration electric drive axle |
-
2020
- 2020-04-29 CN CN202010354845.6A patent/CN111469605A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205022296U (en) * | 2015-09-15 | 2016-02-10 | 韶能集团韶关宏大齿轮有限公司 | With motor and planet gear and coaxial integrated electric drive bridge of differential mechanism |
| CN105790500A (en) * | 2016-04-23 | 2016-07-20 | 中国第汽车股份有限公司 | Integrated driving device for electric vehicle |
| CN107298014A (en) * | 2017-07-04 | 2017-10-27 | 合肥盎然车桥有限公司 | A kind of motor drive axle |
| CN207241396U (en) * | 2017-09-07 | 2018-04-17 | 中国第一汽车股份有限公司 | Longitudinal integrated form drive axle after motor |
| CN208021190U (en) * | 2018-03-30 | 2018-10-30 | 青岛亚荣科技有限公司 | A kind of horizontal integrated three-stage deceleration electric drive axle |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111976470A (en) * | 2020-08-27 | 2020-11-24 | 安徽维德电源有限公司 | Integrated power system of liquid cooling type electric forklift and control method thereof |
| CN111976469A (en) * | 2020-08-27 | 2020-11-24 | 安徽维德电源有限公司 | Integrated power system of liquid cooling type electric forklift and forklift |
| CN111976469B (en) * | 2020-08-27 | 2021-07-27 | 安徽维德电源有限公司 | Integrated power system of liquid cooling type electric forklift and forklift |
| CN111976470B (en) * | 2020-08-27 | 2021-08-03 | 安徽维德电源有限公司 | Integrated power system of liquid cooling type electric forklift and control method thereof |
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