Two-gear rear axle power system of battery electric vehicle
A pure electric vehicle and power system technology, which is applied in the field of the two-speed rear axle power system of pure electric vehicles, can solve the problems of large space occupation, complex structure and high requirements, and achieves the effects of simple control, small volume and simplified structure.
Pending Publication Date: 2019-11-12
CHONGQING TSINGSHAN IND
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Problems solved by technology
Therefore, two clutches are used to realize the power transmission of the two gears. The structure of the two clutches is complex and takes up a large space. The control system required to meet the power switching of the two gears is relatively complicated; In order to reduce overload slippage when switching gears, the requirements for the control system are relatively high. In order to meet the requirements of shifting performance, the two clutches often use wet clutches, resulting in complex structures and high costs.
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[0020] The present invention will be further described below in conjunction with accompanying drawing.
[0021] see figure 1 , a two-speed rear axle power system for a pure electric vehicle, comprising: motor 1, motor shaft 2, clutch 3, one-way clutch 4, inner shaft 6, outer shaft 5, planetary row, rear sun gear 12, rear planetary gear 11 , Output shaft 15.
[0022] The planetary row includes: ring gear 10 , front planetary gear 8 , front sun gear 7 , planetary shaft 13 and planetary carrier 14 . The front sun gear 7 and the rear sun gear 12 are arranged side by side. The front planetary gear 8 is fixedly connected with the rear planetary gear 11 and is sleeved on the planet shaft 13 of the planet carrier 14 of the planetary row side by side. The front sun gear 7 and the rear sun gear The sun gear 12 meshes with the front planetary wheel 8 and the rear planetary wheel 11 respectively, and the front planetary wheel 8 meshes with the ring gear 10 . The gear teeth number of th...
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The invention discloses a two-gear rear axle power system of a battery electric vehicle. The two-gear rear axle power system comprises a motor, a motor shaft, a clutch, a one-way clutch, an inner shaft, an outer shaft, a planetary line, a rear sun gear, a rear planetary gear and an output shaft; the planetary line comprises a gear ring, a front planetary gear, a front sun gear, a planetary shaft and a planetary carrier; by controlling combination and disconnection of an outer seat ring and an inner seat ring of the one-way clutch, two-gear power switching is formed; as for a first-gear power path, first-gear power is provided by the driving motor 1, sequentially passes through the motor shaft, the clutch, the outer shaft, the front sun gear, the front planetary gear, the planetary shaft and the planetary carrier and is output from the output shaft; and a path is increased for second-gear power, and the second-gear power is provided by the driving motor at the same time, sequentially passes through the motor shaft, the clutch, the inner shaft, the rear sun gear, the rear planetary gear, the planetary shaft and the planetary carrier and is output from the output shaft. According to the two-gear rear axle power system, the structure of the clutch is simplified, control is easy, the cost is lowered, and meanwhile the two-gear rear axle power function of the electric vehicle is achieved.
Description
technical field [0001] The invention relates to a pure electric vehicle, in particular to a two-speed rear axle power system of a pure electric vehicle. Background technique [0002] The two-speed rear axle power system of a pure electric vehicle in the prior art includes a drive motor, a planetary row, a rear sun wheel, a rear planetary wheel, a first clutch, a second clutch and an output shaft; wherein, the planetary row includes a front sun wheel, a gear ring, planet carrier and front planetary gear; the drive motor transmits power to the front sun gear and the rear sun gear respectively through the first clutch and the second clutch to realize the two-speed function. Therefore, two clutches are used to realize the power transmission of the two gears. The structure of the two clutches is complex and takes up a large space. The control system required to meet the power switching of the two gears is relatively complicated; In order to reduce overload slippage during gear s...
Claims
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IPC IPC(8): B60K17/02B60K17/08
CPCB60K17/02B60K17/08
Inventor 毛江洪浩孙登明
Owner CHONGQING TSINGSHAN IND