CN202646559U - Transmission of electric vehicle - Google Patents
Transmission of electric vehicle Download PDFInfo
- Publication number
- CN202646559U CN202646559U CN 201220333622 CN201220333622U CN202646559U CN 202646559 U CN202646559 U CN 202646559U CN 201220333622 CN201220333622 CN 201220333622 CN 201220333622 U CN201220333622 U CN 201220333622U CN 202646559 U CN202646559 U CN 202646559U
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- Prior art keywords
- input shaft
- power input
- clutch
- planet carrier
- sun gear
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Abstract
The utility model relates to a transmission of an electric vehicle. The transmission of the electric vehicle comprises a power input shaft and a power output shaft, wherein a sun wheel and a gear ring are coaxially mounted on the power input shaft, the gear ring can rotate relative to the power input shaft, the power output shaft is fixedly connected with a planet carrier, a plurality of planetary gears are arranged on the planet carrier, and the planetary gears are mounted between the gear ring and the sun wheel and meshed with the gear ring and the sun wheel at the same time. Since a first clutch and a second clutch are matched with each other to achieve speed change and transmission, and by combining with stepless speed control of a motor, requirements of different transmission ratios under the condition of high resistance and when the power output shaft rotates at a high speed can be met, overload working situations or light load working situations of the traction motor are reduced, and the service life of the traction motor is prolonged.
Description
Technical field
The utility model relates to a kind of speed change gear, particularly a kind of speed change gear of electric vehicle.
Background technique
The driver part of electric vehicle is motor, and relatively traditional combustion engine has wider operating range, but zero-speed operation, moment of torsion and rotating speed can accurately control, and during motor low speed when permanent torque and high speed the characteristic of permanent power be more suitable for the vehicle operating demand.
Because but motor itself just has wider speed adjustable range and zero-speed operation, generally, only need the rotating speed by control inputs power (motor), can realize higher property of automatic shft, and motor self the realization gear reversing function that can reverse, therefore, be difficult to satisfy the automobile of the traditional internal combustion engine driving of actual road conditions needs than the torque excursion, as the automobile of power source the degree of dependence of speed changer be significantly less than the automobile of traditional internal combustion engine driving with motor.
Yet, in the existing electric vehicle, usually carry out speed change, transmission with following dual mode:
1, directly utilize the rotating speed of motor self to realize speed change.Adopt such structure, only directly export by the rotating speed of motor, when starting motor with overload work, not only the moment of output less, be short of power, cause the vehicle starting time for acceleration longer, and the electric motor overheating amount is large, working life is short.
2, continue to use variable transmission mechanism in the automobile of traditional internal combustion engine driving, but motor self just has wider speed adjustable range, if too much gear is set, has then increased unnecessary speed Control difficulty, and reduced the riding manipulation convenience that electric vehicle should have; And, the variable transmission mechanism that the automobile of traditional internal combustion engine driving adopts, bulky.
The model utility content
The technical problems to be solved in the utility model is to overcome the above-mentioned deficiency of prior art, and a kind of speed change gear that can export the electric vehicle of larger instantaneous torque when starting is provided.
For solving the problems of the technologies described above, the utility model provides following technological scheme:
A kind of speed change gear of electric vehicle, comprise power input shaft and pto＝power take-off, be coaxially arranged with sun gear and gear ring on the described power input shaft, described gear ring and described power input shaft relatively rotate, described pto＝power take-off is fixedly connected with planet carrier, be provided with several planetary pinions on the described planet carrier, described planetary pinion is arranged between gear ring and the sun gear and with gear ring and sun gear and meshes simultaneously; Be provided with first clutch between described power input shaft and the sun gear, described first clutch makes power input shaft with the sun gear combination or separates; Be provided with second clutch between described power input shaft and the planet carrier, described second clutch makes power input shaft be combined with planet carrier or separate.
Preferably, when described first clutch make power input shaft and sun gear in conjunction with the time, described second clutch makes power input shaft separate with planet carrier; When described first clutch made power input shaft separate with sun gear, described second clutch made power input shaft be combined with planet carrier.
Preferably, described first clutch is electric control clutch.
Preferably, described second clutch is electric control clutch.
Compared with prior art, the beneficial effects of the utility model are:
1, cooperatively interacts by first clutch and second clutch and realize speed change and transmission, and in conjunction with the stepless time adjustment of motor self, can satisfy under the high-drag condition and the demand of different drive ratios during the high rotating speed of pto＝power take-off, reduce the situation of traction motor overload work or underloading work, improve the working life of traction motor.
2, compare with manual dual-range transmission, adopt first clutch and second clutch to be combined realization two-stage speed change with planetary gears, volume, thickness size are less; Simultaneously, variable-speed operating control is convenient, fast.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Mark among the figure: power input shaft-1; Gear ring-2; Second clutch-3; First clutch-4; Planet carrier-5; Planetary pinion-6; Sun gear-7; Pto＝power take-off-8.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is further described.
Mode of execution of the present utility model is not limited to following examples, all belongs within the protection domain of the present utility model in the various variations of making under the prerequisite that does not break away from the utility model aim.
As shown in Figure 1, electric vehicle planetary pinion one-level speed change gear in the present embodiment, the power input shaft 1 and the pto＝power take-off 8 that comprise coaxial setting, be coaxially arranged with sun gear 7 and gear ring 2 on the power input shaft 1, gear ring 2 is movably set on the power input shaft 1, can relatively rotate between gear ring 2 and the power input shaft 1.Pto＝power take-off 8 is fixedly connected with planet carrier 5, be provided with several planetary pinions 6 on the planet carrier 5, the number of planetary pinion 6 can arrange three, four, five or more as required, planetary pinion 6 is arranged between gear ring 2 and the sun gear 7 and with gear ring 2 and sun gear 7 and meshes simultaneously, consists of planetary gears.
Be provided with first clutch 4 between power input shaft 1 and sun gear 7, described first clutch 4 makes power input shaft 1 with sun gear 7 combinations or separates; Wherein, first clutch 4 is electric control clutch, power input shaft 1 is combined into one with sun gear 7 and makes it according to operational order and link or power input shaft 1 is separated with sun gear 7 and each autorotation.Be provided with second clutch 3 between power input shaft 1 and planet carrier 5, described second clutch 3 makes power input shaft 1 with planet carrier 5 combinations or separates.Wherein, second clutch 3 is electric control clutch, according to operational order be combined into one linkage or power input shaft 1 separated with planet carrier 5 and relatively rotate of power input shaft 1 and planet carrier 5.When described first clutch 4 make power input shaft 1 and sun gear 7 in conjunction with the time, described second clutch 3 makes power input shaft 1 separate with planet carrier 5; When described first clutch 4 made power input shaft 1 separate with sun gear 7, described second clutch 3 made power input shaft 1 and planet carrier 5 combinations.
Need to prove, in the described mode of execution of this specification, motor self is within the specific limits stepless speed regulation and the rotating speed of power input shaft 1 regulated all.The output shaft of motor connects after-applied live axle power with power input shaft 1, in whole planetary gears, because sun gear 7 is fixedly installed on the end of power input shaft 1, sun gear 7 is driving wheel, after planetary gears speed change or transmission, export to pto＝power take-off 8.
When pto＝power take-off 8 is worked under with high-drag, slow-speed of revolution condition, in the situations such as starting, climbing, export high moment of torsion by the forward gears that slows down in the same way, can avoid motor with overload work; When galloping, for avoiding the too high so that motor of power input shaft 1 rotating speed in light condition work, carry out transmission by synchronized in the same way mode, and according to road conditions motor is adjusted to rational output power work, thus the working life of improving motor.In the present embodiment, the specific works mode of above-mentioned operating mode is as follows:
When vehicle start, by first clutch 4 power input shaft 1 and sun gear 7 are combined into one first, and second clutch 3 is opened so that power input shaft 1 is separated from each other with planet carrier 5.At this moment, in the planetary gears, gear ring 2 is relatively static, sun gear 7 is driving wheel, and planet carrier 5 is driven, and power is after sun gear 7 inputs, the rotating speed of gear ring 2 is lower than the rotating speed of sun gear 7, be arranged on the planet carrier 5 planetary pinion 6 with sun gear 7 engagement in, with gear ring 2 inner mesh, drive planet carrier 5 and rotate, namely realize the driven of planet carrier 5 around the axis of sun gear 7, power exports pto＝power take-off 8 to by planet carrier 5 the most at last.At this moment, velocity ratio between power input shaft 1 and the pto＝power take-off 8 equals the rotating speed of sun gear 7 divided by the rotating speed of planet carrier 5, and because the rotating speed of planet carrier 5 is far below the rotating speed of sun gear 7, therefore velocity ratio is greater than one, can realize slowing down in the same way, in the situation that motor output torque is constant, can exports larger driving torque to pto＝power take-off 8, thereby vehicle start is more prone to.
When vehicle is finished torque demand after the higher acceleration starting stage, pto＝power take-off 8 rotating speeds of automobile are higher, in order to prevent that motor is with underloading and the too high state work of rotating speed, at this moment, need to reduce the velocity ratio between power input shaft 1 and the pto＝power take-off 8, concrete mode is as follows: at first by first clutch 4 power input shaft 1 and sun gear 7 are separated from each other, by second clutch 3 power input shaft 1 and planet carrier 5 are combined into one.At this moment, because power input shaft 1 is by planet carrier 5 and the pto＝power take-off 8 fixed one that are, when power input shaft 1 rotates, planet carrier 5 and pto＝power take-off 8 in the same way, synchronized rotation, velocity ratio between power input shaft 1 and the pto＝power take-off 8 is one, planetary pinion 6 and gear ring 2 servo-actuated revolution, when automobile needs acceleration or deceleration, can switch as required the working state of first clutch 4 and second clutch 3 or the voltage by the regulating electric machine, all can play the effect of regulating power input shaft 1 rotating speed.
When parking of automobile, the power supply of cut-out motor is also extremely zero with the rotational speed regulation of power input shaft 1, at this moment, and power cut.
When rolling-back of car, the counter-rotating of regulating electric machine, namely turning to of changeable power input shaft 1, pto＝power take-off 8 realized reversing.
The utility model is not limited to aforesaid embodiment.The utility model expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (4)
1. the speed change gear of an electric vehicle, comprise power input shaft and pto＝power take-off, be coaxially arranged with sun gear and gear ring on the described power input shaft, described gear ring and described power input shaft relatively rotate, described pto＝power take-off is fixedly connected with planet carrier, be provided with several planetary pinions on the described planet carrier, described planetary pinion is arranged between gear ring and the sun gear and with gear ring and sun gear and meshes simultaneously; It is characterized in that: be provided with first clutch between described power input shaft and the sun gear, described first clutch makes power input shaft with the sun gear combination or separates; Be provided with second clutch between described power input shaft and the planet carrier, described second clutch makes power input shaft be combined with planet carrier or separate.
2. electric vehicle planetary pinion one-level speed change gear according to claim 1 is characterized in that: when described first clutch make power input shaft and sun gear in conjunction with the time, described second clutch makes power input shaft separate with planet carrier; When described first clutch made power input shaft separate with sun gear, described second clutch made power input shaft be combined with planet carrier.
3. electric vehicle planetary pinion one-level speed change gear according to claim 1 and 2, it is characterized in that: described first clutch is electric control clutch.
4. electric vehicle planetary pinion one-level speed change gear according to claim 3, it is characterized in that: described second clutch is electric control clutch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220333622 CN202646559U (en) | 2012-07-11 | 2012-07-11 | Transmission of electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220333622 CN202646559U (en) | 2012-07-11 | 2012-07-11 | Transmission of electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202646559U true CN202646559U (en) | 2013-01-02 |
Family
ID=47415669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220333622 Expired - Lifetime CN202646559U (en) | 2012-07-11 | 2012-07-11 | Transmission of electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202646559U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104633011A (en) * | 2014-12-12 | 2015-05-20 | 合肥工业大学 | Reducer device capable of disengaging and engaging |
| CN106438880A (en) * | 2016-11-14 | 2017-02-22 | 重庆青山工业有限责任公司 | Pure electric two-speed transmission |
| CN109356982A (en) * | 2018-10-16 | 2019-02-19 | 东风汽车集团有限公司 | Planetary reduction gear gearshift and automobile |
| CN109578533A (en) * | 2017-09-29 | 2019-04-05 | 比亚迪股份有限公司 | The electronic assembly of three gears and its speed ratio determine method |
| CN111936334A (en) * | 2018-04-02 | 2020-11-13 | 德纳有限公司 | Traction device |
-
2012
- 2012-07-11 CN CN 201220333622 patent/CN202646559U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104633011A (en) * | 2014-12-12 | 2015-05-20 | 合肥工业大学 | Reducer device capable of disengaging and engaging |
| CN106438880A (en) * | 2016-11-14 | 2017-02-22 | 重庆青山工业有限责任公司 | Pure electric two-speed transmission |
| CN109578533A (en) * | 2017-09-29 | 2019-04-05 | 比亚迪股份有限公司 | The electronic assembly of three gears and its speed ratio determine method |
| CN109578533B (en) * | 2017-09-29 | 2022-03-15 | 比亚迪股份有限公司 | Three-gear electric assembly and speed ratio determination method thereof |
| CN111936334A (en) * | 2018-04-02 | 2020-11-13 | 德纳有限公司 | Traction device |
| CN111936334B (en) * | 2018-04-02 | 2024-05-24 | 德纳有限公司 | Traction device |
| CN109356982A (en) * | 2018-10-16 | 2019-02-19 | 东风汽车集团有限公司 | Planetary reduction gear gearshift and automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |