Electrical machinery planetary mechanism stepless gear system

Abstract

The invention relates to a continuously variable transmission system of an electric mechanical planetary mechanism, which belongs to the technical field of vehicle transmission. The transmission system consists of a first gear (Z1), an idler gear (Z2) and a second gear (Z3) meshing with each other, a planetary mechanism, a first input shaft (1), a sleeve shaft (2), a second input shaft (3 ), an output shaft (4), a third gear (Z4) and a fourth gear (Z5) meshing with each other, a first motor (5), a second motor (6), an inverter and a storage battery. The biggest advantage of the present invention is that the speed ratio of the whole system can be continuously and steplessly changed by using a relatively small-power speed-regulating motor. higher efficiency. Moreover, it has low cost, simple and compact structure, stable and reliable transmission, high ability to transmit power and torque, and easy application of advanced control strategies.

Description

Technical field: [0001] The invention relates to a continuously variable transmission system of an electric mechanical planetary mechanism, which belongs to the technical field of vehicle transmission. Background technique: [0002] The function of the vehicle transmission system is to transmit the power of the power source to the drive wheels, and to change the traction force and vehicle speed according to the requirements of the vehicle. Continuously variable transmission is the development trend of vehicle transmission, and is considered to be the most ideal transmission mode. The continuously variable transmission system can continuously and steplessly change the speed ratio (the ratio of input speed to output speed) according to the driving conditions of the vehicle and the working state of the engine. ), so that the engine can always work in the most efficient area, realize the best match between the external conditions and the vehicle, and enable the vehicle to obtain...

AI Technical Summary

Problems solved by technology

[0004] 1) The metal belt continuously variable transmission system or its deformation requires a complex hydraulic system to realize the clamping force control of the metal belt and the speed ratio control of the transmission system, and there is a complex coupling effect between the clamping force and the speed ratio control

In practice, the structure of the hydraulic system is complex and the efficiency is low, so the efficiency of the entire transmission system is also low

[0005] 2) Due to the limitations of its own mechanical structure, the metal belt type continuously variable transmission system has a small range of speed ratio (the ratio of the maximum speed ratio to the minimum speed ratio of the system) (about 5~6). The mechanism increases the range of the transmission ratio, but at the same time it also expands the power borne by the metal pulley, making the efficiency of the entire system even lower

[0006] 3) The metal belt type continuously variable transmission system or its deformation is based on friction transmission, so its transmission efficiency is low, and the ability to transmit power and torque is also low

[0007] 4) The metal belt type continuously variable transmission system or its deformation needs to manufacture complex hydraulic systems and metal belts, so the processing is difficult and the cost is relatively high

[0008] 5) The total speed ratio of the Toyota PRIUS two-degree-of-freedom single planetary gear train continuously variable transmission system has a small range of change, and the power of the speed-adjusting motor is relatively large

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