Shifting fork gear shifting method, gearbox, new energy vehicle power assembly and vehicle

Abstract

The invention discloses a shifting fork gear shifting method, a gearbox, a new energy vehicle power assembly and a vehicle. The gear shifting method comprises the steps of controlling a three-positionair cylinder to drive a shifting fork gear shifting mechanism to move through a power output signal to achieve automatic switching between two gears; and forming buffering between gear disengaging and gear engaging by ingeniously using the middle position of the three-position air cylinder. The gearbox is of a single-stage planetary shifting fork gear shifting structure, a gear shifting driving air cylinder is the three-position air cylinder, and a magnetic push rod is further arranged to assist in gear engaging. The power assembly is provided with the gearbox, a double-cooling copper rotor alternating current asynchronous motor is adopted as a driving motor, and an insulating oil heat transfer cooling mode is adopted for oil cooling in double cooling to cool a rotor and a stator. The newenergy vehicle comprises the power assembly. The shifting fork gear shifting method, the gearbox, the new energy vehicle power assembly and the vehicle gear have the beneficial effects that gear shifting impact and noise are reduced through the gear shifting method, the gearbox provides guarantee for reducing gear shifting impact and noise, and the power assembly and the new energy vehicle have the same beneficial effects as the gearbox.

Description

technical field [0001] The invention relates to a vehicle gearbox shift control technology, in particular to a fork shift method, a gearbox, a new energy vehicle power assembly and a vehicle. Background technique [0002] As the international community pays more and more attention to energy security and environmental protection issues, countries have increasingly stringent requirements on vehicle emissions. Pure electric vehicles are conducive to reducing energy consumption and have become the development trend of the automotive industry today. The traditional speed change method of pure electric vehicles is to achieve high and low speed driving by adjusting the speed of the motor, but in this mode, when the motor runs at low speed, it generates a lot of heat, has a low conversion rate, and consumes a lot of energy. To this end, the gearbox is configured to shift gears to keep the motor running at high speed, reduce energy consumption, and improve energy utilization. Due t...

AI Technical Summary

Problems solved by technology

[0003] The first purpose of the present invention is to provide a shifting fork control method for the existing two-speed planetary gearbox for electric vehicles, which has large shifting impact and high noise. This method uses the stroke to automatically adjust the cylinder to form a three-dimensional One working position, to use the middle position to form a shift buffer between the shifting and shifting, so as to reduce the shock and noise of shifting, thereby reducing or eliminating the hidden danger of early damage to the gearbox.

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