Six-speed-ratio speed change mechanism

Abstract

The invention discloses a six-speed-ratio speed change mechanism which comprises a machine frame, an input shaft and an output shaft, and further comprises a reverse speed change mechanism, a three-speed-ratio planetary gear speed change mechanism and a two-speed-ratio speed change mechanism. The reverse speed change mechanism comprises a forward input gear transmission pair, a retreat input geartransmission pair and a first gear selecting and shifting device. The forward input gear transmission pair or the retreat input gear transmission pair is selected through the first gear selecting andshifting device to transfer movement and torque between the input shaft and an input component. The three-speed-ratio planetary gear speed change mechanism comprises a planetary gear set, the input component, an output component, a second gear selecting and shifting device and a third gear selecting and shifting device. A sun wheel is selectively connected with the input component or the machine frame through the second gear selecting and shifting device to transfer movement and torque. A gear ring is selectively connected with the input component or the machine frame through the third gear selecting and shifting device to transfer movement and torque. The two-speed-ratio speed change mechanism comprises a first speed change gear transmission pair, a second speed change gear transmission pair and a fourth gear selecting and shifting device, and the first speed change gear transmission pair or the second speed change gear transmission pair is selected through the fourth gear selecting and shifting device to transfer movement and torque between the output component and the output shaft.

Description

technical field [0001] The invention relates to the technical field of automobile transmissions, in particular to a six-speed ratio transmission mechanism. Background technique [0002] In some applications, the power system is required to provide a wide range of speed and torque output, such as a car with complex driving conditions, in order to meet various driving conditions such as starting, acceleration, climbing, and high-speed driving, the driving wheels need to have a wide range of speed and torque. Torque range, while automotive engines usually can only provide a limited range of torque output in a relatively narrow speed range, using a transmission with multiple transmission ratios to expand the output speed and torque range can meet the complex and changeable driving conditions of the car. Huge difference in power requirements. [0003] As an important auto part, automobile transmission needs to have the characteristics of compact structure, high transmission effi...

AI Technical Summary

Problems solved by technology

[0003] As an important automobile part, the automobile transmission needs to have the characteristics of compact structure, high transmission efficiency, reliable operation and long service life. and hydraulic torque converters to achieve multiple transmission ratios, some use multiple gear pairs with different gear ratios to achieve multiple transmission ratios, and some use modified input shaft pulleys and output shaft pulleys. These transmissions have made great contributions to improving vehicle power performance and fuel economy. However, in order to meet increasingly high user needs, these transmissions have increasingly complex structures, are difficult to manufacture, and are expensive.

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