CN105570422A - Speed reducer and differential mechanism assembly for rear axle of electric automobile - Google Patents
Speed reducer and differential mechanism assembly for rear axle of electric automobile Download PDFInfo
- Publication number
- CN105570422A CN105570422A CN201610119537.9A CN201610119537A CN105570422A CN 105570422 A CN105570422 A CN 105570422A CN 201610119537 A CN201610119537 A CN 201610119537A CN 105570422 A CN105570422 A CN 105570422A
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- China
- Prior art keywords
- gear
- differential
- differential mechanism
- rear axle
- electric automobile
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/06—Differential gearings with gears having orbital motion
- F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/36—Differential gearings characterised by intentionally generating speed difference between outputs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/06—Differential gearings with gears having orbital motion
- F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
- F16H2048/085—Differential gearings with gears having orbital motion comprising bevel gears characterised by shafts or gear carriers for orbital gears
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/36—Differential gearings characterised by intentionally generating speed difference between outputs
- F16H2048/364—Differential gearings characterised by intentionally generating speed difference between outputs using electric or hydraulic motors
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Retarders (AREA)
Abstract
The invention relates to the technical field of rear axles of vehicles, in particular to a speed reducer and differential mechanism assembly for a rear axle of an electric automobile. The speed reducer and differential mechanism assembly for the rear axle of the electric automobile comprises a driving box, a speed reducing mechanism and a differential mechanism. Both the speed reducing mechanism and the differential mechanism are arranged in the driving box. The speed reducing mechanism comprises an input shaft and an output shaft. The input shaft is in transmission connection with a driving motor. The output shaft is in transmission connection with the differential mechanism and used for driving the differential mechanism to operate. The differential mechanism is provided with two output half shafts, and the two output half shafts are fixedly connected with two automobile hubs correspondingly. The speed reducer and differential mechanism assembly for the rear axle of the electric automobile is simple in structure, compact and firm; cooperation of the rotating speed of an inner wheel and the rotating speed of an outer wheel can be achieved through the differential mechanism when the electric automobile turns a corner, so that the phenomenon that the electric automobile distorts and turns on one side when turning a corner is effectively prevented, and traffic accidents are avoided.
Description
Technical field
The present invention relates to vehicle rear axle technical field, especially relate to a kind of rear axle of electric automobile speed reducer differential assembly.
Background technique
Electric vehicle is developed rapidly at home due to its energy-conserving and environment-protective performance and cheap usage charges in recent years, and particularly since 2015, the back axle manufacture of electric vehicle and demand present fast development trend.Existing conventional electric vehicle remains speed changer, main reducing gear, differential mechanism, the break of conventional vehicle, therefore, requires lower, and can select less motor to motor.The drive unit of existing electric vehicle is generally following two kinds: one adds two grades of gears for drive motor adds clutch, and this drive unit must arrange clutch configuration, and transmission loss is larger, ineffective systems, and complex structure, need regularly replace zero clutch parts, cost is high; And although this drive unit have employed two grades of speed changes, between two grades, speed ratio difference is comparatively large, and impact excessive in shift process, riding comfort reduces greatly.A kind of existing electric vehicle is also had to drive back axle, although motor and Design of Speed Reducer are integrated, but axle device without differential on back axle, or employing Dual-motors Driving, such motor drives back axle, when by bend, is the differential problem that cannot solve two trailing wheels, there is rollover than being easier to, bringing potential safety hazard to traveling.
Summary of the invention
For solving the problem, rear axle of electric automobile speed reducer differential assembly provided by the invention, comprise drive case, reducing gear and differential mechanism, reducing gear and differential mechanism are all arranged in drive case; Reducing gear comprises input shaft and output shaft, and input shaft and drive motor are in transmission connection; Output shaft is connected with differential drive, operates for driving differential mechanism; Differential mechanism is provided with two output axle shafts, and two output axle shafts are fixedly connected with two automotive hubs respectively.
Further, differential mechanism comprises gear disk, planetary wheel carrier and two differential gears, and two planetary pinions; Two relative being arranged on planetary wheel carrier of planetary pinion, and two planetary pinions and planetary wheel carrier are rotationally connected; Planetary wheel carrier is fixed on gear disk; Gear disk is set on an output axle shaft, and is rotationally connected with this output axle shaft; Two differential gears are fixedly connected with two output axle shafts respectively, and two differential gears engage with two planetary pinions respectively; Output shaft is provided with output gear, and output gear engages with gear disk.
Further, differential mechanism also comprises differential mechanism shell; Planetary wheel carrier, two differential gears and two planetary pinions are all arranged in differential mechanism shell; Planet gear pad spherical in shape is provided with between each planetary pinion and differential mechanism shell; Differential gear pad is provided with between each differential gear and differential mechanism shell.
Further, the material of planet gear pad and differential gear pad is polytetrafluoroethylmaterial material.
Further, reducing gear also comprises driving gear and driven gear; The diameter of driving gear is less than the diameter of driven gear; Driving gear is arranged on input shaft, and driven gear is arranged on output shaft; Driving gear engages with driven gear.
Further, drive case is provided with rear axle housing flange, rear axle housing flange is for being installed to rear axle casing of electric vehicle by drive case.
Further, the side of drive case is provided with the adpting flange for installing drive motor.
Further, drive motor is ac synchronous motor.
Rear axle of electric automobile speed reducer differential assembly provided by the invention, structure is simple, Compact robust, when can realize electric vehicle turning by differential mechanism, cooperatively interacting of interior outer wheel speeds, thus effectively prevent the distortion rollover phenomenon of electric vehicle when turning, avoid the generation of traffic accident.
Accompanying drawing explanation
In order to be illustrated more clearly in the specific embodiment of the invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the rear axle of electric automobile speed reducer differential assembly that Fig. 1 provides for the embodiment of the present invention.
Reference character:
1-drive case; 11-adpting flange; 12-rear axle housing flange;
2-input shaft; 21-driving gear; 22-input shaft bearing;
23-oil sealing; 3-output shaft; 31-driven gear;
32-output gear; 33-flat key; 4-output axle shaft;
41-differential gear; 42-differential gear pad; 43-spring arch clasp;
44-differential bearing; 5-gear disk; 6-planetary wheel carrier;
7-planetary pinion; 71-planet gear pad; 8-differential mechanism shell.
Embodiment
Be clearly and completely described technological scheme of the present invention below in conjunction with accompanying drawing, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In describing the invention, it should be noted that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "left", "right", " vertically ", " level ", " interior ", " outward " they be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second ", " the 3rd " only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
The structural representation of the rear axle of electric automobile speed reducer differential assembly that Fig. 1 provides for the embodiment of the present invention.As shown in Figure 1, the rear axle of electric automobile speed reducer differential assembly that the present embodiment provides, comprises drive case 1, reducing gear and differential mechanism, and reducing gear and differential mechanism are all arranged in drive case 1; Reducing gear comprises input shaft 2 and output shaft 3, and input shaft 2 and drive motor are in transmission connection; Output shaft 3 is connected with differential drive, operates for driving differential mechanism; Differential mechanism is provided with two output axle shafts, 4, two output axle shafts 4 and is fixedly connected with two automotive hubs respectively.
Wherein, drive motor is ac synchronous motor, and drive case 1 is provided with the adpting flange 11 for installing drive motor, adpting flange 11 is fixed with hex head bolt.Reducing gear comprises input shaft 2 and output shaft 3, input shaft 2 is provided with driving gear 21, output shaft 3 is provided with driven gear 31, driving gear 21 engages with driven gear 31, drive motor band driven input shaft 2 rotates, and then drives output shaft 3 to rotate, and realizes the first order and slows down.See Fig. 1, the diameter of driving gear 21 is less than the diameter of driven gear 31, and its fixing reduction speed ratio is 7.5: 1.Input shaft 2 and output shaft 3 be arranged in parallel, make the compact structure of whole driving back axle, can be good at adapting to running up of autosynchronous motor, are suitable for motor stepless change and determine moment of torsion output control.
An input shaft bearing 22 is respectively equipped with at the two ends of input shaft 2, and the one end be wherein connected with drive motor is provided with rubber oil sea 23, can prevent dust foreign material from entering in drive case 1; The axle head be connected with drive motor is provided with external spline, coordinates with the internal spline of motor axis hole, and motor rotation is then with driven input shaft 2 to rotate.
An output bearing (not shown) is also respectively equipped with at the two ends of output shaft 3, and one end axial plane of output shaft 3 is provided with flat key 33, utilizes key to connect and makes driven gear 31 be convenient to combination assembling and positioning on the output shaft 3 in drive case 1.
The axle head that differential mechanism is provided with two output axle shafts, 4, two output axle shafts 4 is set with differential bearing 44 and spring arch clasp 43 axial limiting in addition.
On the basis of above-described embodiment, further, differential mechanism comprises gear disk 5, planetary wheel carrier 6 and two differential gears 41, and two planetary pinions 7; Two relative being arranged on planetary wheel carrier 6 of planetary pinion 7, and two planetary pinions 7 are rotationally connected with planetary wheel carrier 6; Planetary wheel carrier 6 is fixed on gear disk 5; Gear disk 5 is set on an output axle shaft 4, and is rotationally connected with this output axle shaft 4; Two differential gears 41 are fixedly connected with two output axle shafts 4 respectively, and two differential gears 41 engage with two planetary pinions 7 respectively; Output shaft 3 is provided with output gear 32, output gear 32 engages with gear disk 5.
Output shaft 3 is provided with output gear 32, output gear 32 engages with gear disk 5, and output shaft 3 rotation driven gear dish 5 rotates, and realizes the second level and slows down.Planetary wheel carrier 6 is fixed on gear disk 5, and gear disk 5 rotates and drives planetary wheel carrier 6 to rotate, and two planetary pinions 7 on planetary wheel carrier 6 drive two differential gears 41 to rotate, and then passes through two vehicle wheel rotations of two output axle shafts 4 difference driving automobile back axles;
When automobile is kept straight on, left and right two wheels are equal with the rotating speed of planetary wheel carrier 6 three is in state of equilibrium; When automobile turning, arranged on left and right sides vehicle wheel rotational speed is inconsistent, cause the rotating speed of two differential gears 41 also inconsistent respectively by two output axle shafts 4, because two planetary pinions 7 and planetary wheel carrier 6 are rotationally connected, two differential gear 41 rotating speeds are inconsistent causes two planetary pinions 7 to produce rotation, thus realize the difference of arranged on left and right sides vehicle wheel rotational speed, effectively preventing the distortion rollover phenomenon of electric motor car when turning, avoiding the generation of traffic accident.
On the basis of above-described embodiment, further, differential mechanism also comprises differential mechanism shell 8; Planetary wheel carrier 6, two differential gears 41 and two planetary pinions 7 are all arranged in differential mechanism shell 8; Planet gear pad 71 spherical in shape is provided with between each planetary pinion 7 and differential mechanism shell 8; Differential gear pad 42 is provided with between each differential gear 41 and differential mechanism shell 8.
On the basis of above-described embodiment, further, the material of planet gear pad 71 and differential gear pad 42 is polytetrafluoroethylmaterial material.
Differential gear pad 42 is equipped with between differential mechanism shell 8 and two differential gears 41, differential gear pad 42 is that polytetrafluoroethylmaterial material is made, be axially fixed at the rotating shaft end of two differential gears 41, prevent two differential gear 41 ear end face contact axle sleeves, friction occurs and causes wearing and tearing.
Two planetary pinions 7 are meshed with two differential gears 41 respectively and rotate.Planet gear pad 71 spherical in shape is equipped with between two planetary pinions 7 and differential mechanism shell 8.Planet gear pad 71 is that polytetrafluoroethylmaterial material is made, and is fixed on the rear end of planetary pinion 7, prevents planetary pinion 7 from contacting the housing of differential mechanism, friction occurs and causes wearing and tearing.
On the basis of above-described embodiment, further, drive case 1 is provided with rear axle housing flange 12, rear axle housing flange 12 is for being installed to rear axle casing of electric vehicle by drive case 1.
Rear axle housing flange 12 is utilized drive case 1 to be installed on vehicle rear-axle housing, to form complete Automobile drive back axle.
By above mode of execution, the rear axle of electric automobile speed reducer differential assembly that the present embodiment provides, adopt gear reduction unit and differential mechanism to cog to coil the mode engaged and realize two-stage gear reduced drive, not only structure is simple, Compact robust, and when can realize electric vehicle turning by differential mechanism, cooperatively interacting of interior outer wheel speeds, thus effectively prevent the distortion rollover phenomenon of electric vehicle when turning, avoid the generation of traffic accident.
Last it is noted that above each embodiment is only in order to illustrate technological scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technological scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristics; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technological scheme.
Claims (8)
1. a rear axle of electric automobile speed reducer differential assembly, is characterized in that, comprises drive case, reducing gear and differential mechanism, and described reducing gear and described differential mechanism are all arranged in described drive case;
Described reducing gear comprises input shaft and output shaft, and described input shaft and drive motor are in transmission connection; Described output shaft is connected with described differential drive, operates for driving described differential mechanism; Described differential mechanism is provided with two output axle shafts, and two described output axle shafts are fixedly connected with two automotive hubs respectively.
2. rear axle of electric automobile speed reducer differential assembly according to claim 1, it is characterized in that, described differential mechanism comprises gear disk, planetary wheel carrier and two differential gears, and two planetary pinions;
Two relative being arranged on described planetary wheel carrier of described planetary pinion, and two described planetary pinions and described planetary wheel carrier are rotationally connected; Described planetary wheel carrier is fixed on described gear disk; Described gear disk is set on a described output axle shaft, and is rotationally connected with this output axle shaft; Two described differential gears are fixedly connected with two described output axle shafts respectively, and two described differential gears engage with two described planetary pinions respectively;
Described output shaft is provided with output gear, and described output gear engages with described gear disk.
3. rear axle of electric automobile speed reducer differential assembly according to claim 2, it is characterized in that, described differential mechanism also comprises differential mechanism shell; Described planetary wheel carrier, two described differential gears and two described planetary pinions are all arranged in described differential mechanism shell; Planet gear pad spherical in shape is provided with between each described planetary pinion and described differential mechanism shell; Differential gear pad is provided with between each described differential gear and described differential mechanism shell.
4. rear axle of electric automobile speed reducer differential assembly according to claim 3, is characterized in that, the material of described planet gear pad and described differential gear pad is polytetrafluoroethylmaterial material.
5. rear axle of electric automobile speed reducer differential assembly according to claim 2, it is characterized in that, described reducing gear also comprises driving gear and driven gear; The diameter of described driving gear is less than the diameter of described driven gear;
Described driving gear is arranged on described input shaft, and described driven gear is arranged on described output shaft; Described driving gear engages with described driven gear.
6. rear axle of electric automobile speed reducer differential assembly according to claim 1, is characterized in that, described drive case is provided with rear axle housing flange, and described rear axle housing flange is for being installed to rear axle casing of electric vehicle by described drive case.
7. rear axle of electric automobile speed reducer differential assembly according to claim 1, is characterized in that, the side of described drive case is provided with the adpting flange for installing drive motor.
8. rear axle of electric automobile speed reducer differential assembly according to claim 1, is characterized in that, described drive motor is ac synchronous motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610119537.9A CN105570422A (en) | 2016-03-02 | 2016-03-02 | Speed reducer and differential mechanism assembly for rear axle of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610119537.9A CN105570422A (en) | 2016-03-02 | 2016-03-02 | Speed reducer and differential mechanism assembly for rear axle of electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105570422A true CN105570422A (en) | 2016-05-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610119537.9A Pending CN105570422A (en) | 2016-03-02 | 2016-03-02 | Speed reducer and differential mechanism assembly for rear axle of electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105570422A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106763661A (en) * | 2017-02-17 | 2017-05-31 | 重庆瑞阳鑫驰新能源汽车有限责任公司 | A kind of electric automobile and its main reducing gear and rear axle structure |
| CN107808583A (en) * | 2017-11-28 | 2018-03-16 | 安徽安凯汽车股份有限公司 | A kind of rear bridge driven teaching demonstration frock |
| CN108437787A (en) * | 2018-05-19 | 2018-08-24 | 浙江鑫可精密机械有限公司 | A kind of New-energy electric vehicle rear-guard direct connection retarder |
| CN108674162A (en) * | 2018-05-31 | 2018-10-19 | 汽解放汽车有限公司 | A kind of axle assembly of Dual-motors Driving |
| CN111619341A (en) * | 2020-05-21 | 2020-09-04 | 安徽江淮汽车集团股份有限公司 | Speed reducer, electric drive system and electric automobile |
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| US20040018909A1 (en) * | 2000-10-04 | 2004-01-29 | Su-Yang Hwa | Planetary gear apparatus |
| CN203035880U (en) * | 2013-01-30 | 2013-07-03 | 台州金纳车桥有限公司 | Differential mechanism used for new energy automobile |
| CN103273841A (en) * | 2013-04-28 | 2013-09-04 | 明双奇 | Rear axle transmission device and integrated rear axle assembly |
| CN104088979A (en) * | 2014-07-25 | 2014-10-08 | 湖南农业大学 | Planetary gear type inter-axle differential for four-wheel drive automobile |
| CN204915301U (en) * | 2015-09-15 | 2015-12-30 | 韶能集团韶关宏大齿轮有限公司 | Electric fork -lift transaxle |
| CN205423737U (en) * | 2016-03-02 | 2016-08-03 | 十堰焕金工贸有限公司 | Electric automobile rear axle speed reducer differential mechanism assembly |
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2016
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040018909A1 (en) * | 2000-10-04 | 2004-01-29 | Su-Yang Hwa | Planetary gear apparatus |
| CN203035880U (en) * | 2013-01-30 | 2013-07-03 | 台州金纳车桥有限公司 | Differential mechanism used for new energy automobile |
| CN103273841A (en) * | 2013-04-28 | 2013-09-04 | 明双奇 | Rear axle transmission device and integrated rear axle assembly |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106763661A (en) * | 2017-02-17 | 2017-05-31 | 重庆瑞阳鑫驰新能源汽车有限责任公司 | A kind of electric automobile and its main reducing gear and rear axle structure |
| CN107808583A (en) * | 2017-11-28 | 2018-03-16 | 安徽安凯汽车股份有限公司 | A kind of rear bridge driven teaching demonstration frock |
| CN107808583B (en) * | 2017-11-28 | 2023-09-12 | 安徽安凯汽车股份有限公司 | Rear axle drive demonstration teaching tool |
| CN108437787A (en) * | 2018-05-19 | 2018-08-24 | 浙江鑫可精密机械有限公司 | A kind of New-energy electric vehicle rear-guard direct connection retarder |
| CN108437787B (en) * | 2018-05-19 | 2023-09-15 | 浙江鑫可传动科技有限公司 | New energy electric automobile rear-drive direct-connection speed reducer |
| CN108674162A (en) * | 2018-05-31 | 2018-10-19 | 汽解放汽车有限公司 | A kind of axle assembly of Dual-motors Driving |
| CN111619341A (en) * | 2020-05-21 | 2020-09-04 | 安徽江淮汽车集团股份有限公司 | Speed reducer, electric drive system and electric automobile |
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Application publication date: 20160511 |