A double-input-shaft five-speed ratio transmission mechanism

Abstract

The invention provides a double-input shaft five-speed ratio speed change mechanism which comprises a first input shaft, a second input shaft, an output shaft and a rack, and further comprises a three-speed ratio planetary gear speed change mechanism and a two-speed ratio speed change mechanism; the three-speed ratio planetary gear speed change mechanism comprises a planetary gear set, an input component, an output component, a first gear selecting and shifting device and a second gear selecting and shifting device, a sun gear is selectively connected with the input component or the rack through the first gear selecting and shifting device to transmit motion and torque, and a gear ring is selectively connected with the input component or the rack through the second gear selecting and shifting device to transmit motion and torque; and the two-speed ratio speed change mechanism comprises a first speed change gear transmission pair, a second speed change gear transmission pair and a thirdgear selecting and shifting device, and the first speed change gear transmission pair or the second speed change gear transmission pair is selected through the third gear selecting and shifting device to transmit motion and torque.

Description

technical field [0001] The invention relates to the technical field of automobile transmissions, in particular to a double-input-shaft five-speed-ratio transmission mechanism. Background technique [0002] In some applications, the transmission system is required to have multiple speed ratios to expand the output speed and torque range to meet application requirements, such as vehicles with complex and changeable driving conditions, which require a wide range of speed and torque to meet starting, acceleration, climbing, high-speed Driving and other driving conditions, different working conditions have huge differences in speed and torque requirements, and automobile engines, especially gasoline engines and diesel engines widely used as automobile engines, provide a limited range of speed and torque, especially for high-efficiency speed and torque. The torque range is smaller, and the automobile transmission is required to provide multiple speed ratios to adjust the contradic...

AI Technical Summary

Problems solved by technology

[0003] As an important auto part, the automobile transmission needs to have the characteristics of compact structure, high transmission efficiency, reliable operation, and long life. Multiple speed ratios are achieved by the row and hydraulic torque converter, some gear pairs with different gear ratios are used to achieve multiple speed ratios, and some are obtained by changing the working radius of the input shaft pulley and output shaft pulley. These transmissions contribute significantly to the improvement of vehicle power performance and fuel economy. However, in order to meet the increasing needs of users, these transmissions have more complex and fine structures, which are difficult to manufacture and expensive.

[0004] Electric motors have better output characteristics than gasoline engines or diesel engines, and are more suitable for use as automotive engines with wider speed and high efficiency ranges. Currently, most electric vehicles use them in order to obtain more compact structures, higher transmission efficiency, and more flexible layouts There is only one reduction ratio reduction gearbox transmission, but this can only meet the general functional requirements, and it is far from meeting the higher power performance and driving economy requirements

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