Two-gear reducer with P-gear structure for pure electric vehicle

Abstract

The invention discloses a two-gear reducer with a P-gear structure for a pure electric vehicle. The two-gear reducer comprises an electronic shifter and a two-gear reducer body. One side of the electronic shifter is provided with a P-gear locking shaft, one end of the P-gear locking shaft is provided with a P-gear fixing guide plate, one side of the P-gear fixing guide plate is provided with a P-gear guide block torsion spring, one end of the P-gear guide block torsion spring is provided with a P-gear locking guide block, the lower side of the P-gear locking guide block is provided with a P-gear locking plate, and one side of the P-gear locking plate is in clamping connection with a P-gear locking wheel. According to the two-gear reducer, by using speed ratio regulation, the high efficiency range of a motor is expanded, and the working rotation speed of the motor is reduced; a two-gear electric bridge can compensate for the power drop caused by the rotation speed increase by shifting aworking point of a high-rotation-speed region to a low- rotation-speed region, during second-gear high-speed running, downshifting acceleration is used for overtaking, and driving safety under a highspeed condition is guaranteed; and with a P-gear parking function, it is guaranteed that a vehicle is safely parked in a stationary state.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a two-speed reducer with a P gear structure for pure electric vehicles. Background technique [0002] With the gradual emphasis on environmental protection issues and the gradual deterioration of energy issues, the demand for new energy vehicles, especially electric vehicles, is increasing. Electric vehicles refer to vehicles that use batteries as the source of energy, and convert electrical energy into mechanical motion through controllers, motors and other components. [0003] At present, there are mainly two kinds of transmission schemes adopted by the electric vehicle power system. The first option is motor direct drive. The program adopts a fixed reduction ratio and directly relies on the motor to realize the task of variable speed. However, due to the characteristic curve of the electrode, it is difficult to make the motor work in the high-efficiency range while ensu...

AI Technical Summary

Problems solved by technology

However, due to the characteristic curve of the electrode, it is difficult to make the motor work in the high-efficiency range while ensuring the power performance with a fixed reduction ratio. The motor cannot be used efficiently, and the power consumption is high.

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