Power assembly for electric automobile

Abstract

The invention provides a power assembly for an electric automobile. The power assembly comprises a driving motor (2) and a power transmission system (1), wherein the driving motor is a permanent magnet synchronous motor; the power transmission system (1) comprises a gear transmission system, an automatic gear-shifting system and an automatic parking system; the gear transmission system comprises a differential assembly (13), an input shaft (16), a shifting fork, a synchronizer (17), a first-gear gear and a second-gear gear (18); the automatic gear-shifting system comprises a gear-shifting motor (4), a shifting fork (5), a shifting fork shaft (7), a gear-shifting shaft (6), a gear-shifting cover plate (8), a gear-shifting shaft angle sensor (9), a gear-shifting position detection rod (10),a gear-shifting motor cover plate (11) and a shift sensor (12); and the automatic parking system comprises a P-gear motor (3), a P-gear pawl (15), a P-gear pawl pressure plate (19), a spring pre-fastening mechanism (20), a P-gear shaft (21), a P-gear cover plate (22), a P-gear position detection rod (23) and a P-gear position sensor (24).

Description

technical field [0001] The invention relates to a power system of an electric vehicle, more precisely, relates to a power source and a power transmission system which can adapt to external conditions and greatly improve the power and economy of the electric vehicle. Background technique [0002] With the rise of fuel prices and the continuous enhancement of people's awareness of environmental protection, countries all over the world are looking for a renewable and clean alternative energy. Electric energy is a renewable clean energy recognized by the world. Due to its "zero" emission characteristics and the wide working range of the variable frequency traction motor, its constant torque at low speed and constant power at high speed are very suitable for the needs of vehicle operation, so electric vehicles have become the current development of domestic and foreign automobile industries. hotspots. [0003] However, current electric vehicles mostly use a first-speed reducer ...

AI Technical Summary

Problems solved by technology

However, the driving motor of electric vehicles is in the low-efficiency area in most cases, which will waste precious battery energy and reduce the driving range

According to the driving characteristics of electric vehicles, the driving motor should not only provide high instantaneous torque in the constant torque area, but also provide high operating speed in the constant power area to meet the high-speed requirements and acceleration climbing requirements of the vehicle. Under the current technical conditions, it is difficult for electric vehicle drive motors to meet such requirements

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