Single-planet-row electric driving system based on synchronizer gear shifting and control method of single-planet-row electric driving system

Abstract

The invention discloses a single-planet-row electric driving system based on synchronizer gear shifting. A planet row comprises a sun gear, a planet gear, a planet carrier and a planet row gear ring, wherein the sun gear is connected with an output shaft of a driving motor; a low-speed baffle plate is fixedly arranged in a shell of an electric driving system; a synchronizer comprises a sliding sleeve, a low-speed gear cone hub and a direct gear cone hub; the sliding sleeve is connected with the planet row gear ring, the low-speed gear cone hub is connected with the low-speed gear partition plate, the direct gear cone hub is connected with the planet carrier, and the sliding sleeve is selectively connected with the low-speed gear cone hub or the direct gear cone hub; one end of the transmission output shaft is fixedly connected with the planet carrier; the differential mechanism is connected with the other end of the transmission output shaft and transmits power to a left half shaft and a right half shaft of the vehicle. The invention further discloses a control method of the single-planet-row electric driving system based on synchronizer gear shifting, power switching of the electric driving system is achieved by controlling displacement of the sliding sleeve of the synchronizer, synchronizer actions are accurately and efficiently executed, and the synchronizer action time is shortened.

Description

technical field [0001] The present invention relates to the technical field of automobile drive, more specifically, the present invention relates to a single planetary electric drive system based on synchronizer shifting and a control method thereof. Background technique [0002] With the increasingly serious global environmental problems, the development of electric vehicle technology is becoming more and more mature. Electric motors have good speed regulation and torque control performance, so electric vehicles can replace traditional internal combustion engines and gearboxes in the form of direct drive by electric motors. Compared with traditional vehicles, the transmission system of electric vehicles has obvious advantages such as simple structure, low cost, and low noise. Therefore, it is necessary to design the transmission system of electric vehicles. [0003] Existing two-speed transmissions for electric vehicles have two layout forms: parallel shaft type and plane...

AI Technical Summary

Problems solved by technology

Among them, the parallel shaft arrangement generally uses gear shift actuators such as synchronizers or meshing sleeves. The gear shift actuators are small, but the parallel shafts take up a lot of space and are not easy to arrange, and the smoothness and shift quality of the shift process are poor; while Although the planetary arrangement is compact in structure, the transmission system is too complicated and expensive to maintain due to the need to use clutches or brakes and a complete set of hydraulic systems during the gear shifting process.

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