Multi-layer parking system for all-electric vehicle

Abstract

The invention discloses a multi-layer parking system for all-electric vehicle. The system comprises a casing, a ratchet wheel, a ratchet, a ratchet shaft, a torsional spring, a cam disc, a driving piece and a driving shaft, wherein the ratchet wheel is fixedly mounted on a rotating shaft enabling a wheel to always keep power transmission in a speed changer; the ratchet shaft and the driving shaft do not share one shaft and are arranged on the casing; the cam disc is rotationally arranged on the driving shaft; the driving piece is fixed on the driving shaft; the ratchet is rotationally arranged on the ratchet shaft; the driving shaft rotates positively and negatively and can drive the driving piece to rotate positively and negatively with the driving shaft; the driving piece further drives the cam disc to rotate positively and negatively around the driving shaft; the cam disc further drives the ratchet to rotate positively and negatively around ratchet shaft, so as to enable the ratchet and the ratchet wheel to be meshed with each other for parking or be separated from each other for unlocking; the torsional spring is pre-tightened and is mounted on the ratchet shaft, and provides an elastic force for pushing the ratchet to rotate to an unlocking direction. All mechanisms of the system adopt multilayer arrangement, so that the radial dimension of the system can be greatly shortened, and the system is convenient to mount and maintain.

Description

technical field [0001] The invention relates to vehicle drive system technology, in particular to a multi-level parking system for pure electric vehicles. Background technique [0002] In conventional fuel vehicles, the parking system is usually integrated inside the transmission. This is due to the low efficiency of the engine. In order to better exert the power and economy of the engine, more gears are usually required, so that the axial length of the transmission At the same time, due to the long axial dimension of the engine, in order to arrange the powertrain composed of the engine and transmission inside the engine compartment, there are strict restrictions on the axial length of the powertrain, while the radial dimensions such as width and height lower requirements. [0003] However, in pure electric vehicles, since the length and diameter of the motor are much smaller than that of the engine, and because the efficiency of the motor is much higher than that of the en...

AI Technical Summary

Problems solved by technology

However, since the motor controller is much larger than the engine controller, and the motor controller is usually arranged above the motor, the radial dimension of the electric powertrain is required to be relatively high

[0004] Due to the difference in the structure of the powertrain of the pure electric vehicle and the powertrain of the conventional fuel vehicle, there are differences in the size requirements of the powertrain in all directions, while the parking actuator in the parking system of the conventional fuel vehicle Usually arranged on the side of the ratchet, so that the parking system has a smaller axial length and a larger radial dimension, which obviously does not meet the requirements of the electric powertrain of pure electric vehicles

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