Thrust type CVT (continuously variable transmission) mechanical continuously variable transmission with transmission ratio of 5-15 for electric automobile

Abstract

The invention discloses a thrust type CVT (continuously variable transmission) with a transmission ratio of 5-15 for a new energy electric vehicle, which is characterized in that two or more driving push wheels driven by a motor are uniformly arranged around an output cone pulley, and working cone rings on two sides of the driving push wheels are respectively in tangent contact with the output cone pulley and keep certain radial pressure; the driving push wheel revolves around the output cone pulley but does not rotate to push the output cone pulley to rotate, the rotating speed of the output cone pulley is changed by changing the radial position where a working cone ring of the driving push wheel is tangent to the output cone pulley, stepless speed regulation is achieved, and the diameter of the working cone ring of the driving push wheel is 1 / 15 of the diameter of the output cone pulley under the reasonable size. And 5-15 wide-range transmission ratio change is realized through the planetary gear output mechanism, so that the torque is increased, the rotating speed of the motor is kept in an efficient and reasonable region in the whole working condition range, the power is not interrupted in the speed change process, the speed regulation is stable without gear shifting pause, the rotating speed of the motor is reduced, the energy consumption is reduced, the endurance mileage is prolonged, and the high-speed cruise capability is improved.

Description

technical field [0001] The invention relates to a continuously variable transmission, in particular to a CVT mechanical continuously variable transmission for new energy electric vehicles. Background technique [0002] Most of the existing electric vehicles use a single-stage reducer with a transmission ratio of about 9, some use a two-stage reduction transmission with a transmission ratio of about 6 and 10, and some try to use a multi-stage reduction transmission. Belt or steel chain CVT mechanical continuously variable transmission can meet the needs of various working conditions of the vehicle. At present, two motors in different modes and two motors are respectively equipped with single-stage reducers with different speed ratios to meet the high and low speed needs of vehicles. [0003] In addition, although the single-stage reducer is not optimal to match the motor with various working conditions, it can make the motor meet the needs of most common working conditions un...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that new energy electric vehicles are equipped with single-stage double-stage or multi-stage reducers or traditional CVT continuously variable transmissions or two motors in different modes, it is not guaranteed to keep the motor speed in a reasonable high-efficiency area in most working conditions The smaller the number of stages of the reducer, the larger the volume and power of the motor and the controller will be, resulting in greater power consumption and shorter cruising range, as well as problems such as the shifting of the double-stage multi-stage reducer.

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