Hydromechanical gearbox

Abstract

A hydromechanical gearbox realizes nine forward motion gears and one reverse motion gear and comprises a hydrodynamic torque converter, a planetary reduction gear, three controllable brakes and three controllable clutches. In the planetary reduction gear, a planet carrier of a fourth planetary gear set is connected to a crown wheel of a third planetary gear set and to an output link. A sun wheel of the fourth planetary gear set is connected by a clutch to a sun wheel of a second planetary gear set. A main wheel of the fourth planetary gear set is connected to a planet carrier of the third planetary gear set and by a brake to the crankcase of the gearbox. The planet carrier of the third planetary gear set is connected by a clutch to the sun wheel of the second planetary gear set. A sun wheel of the third planetary gear set is connected to a main wheel of a first planetary gear set and by a clutch to a planet carrier of the second planetary gear set. The planet carrier of the second planetary gear set is connected by a brake to the crankcase of the gearbox. The sun wheel of the second planetary gear set is connected to an output element of the hydrodynamic torque converter and directly to an input link of the gearbox. A main wheel of the second planetary gear set is connected to a planet carrier of the first planetary gear set. A sun wheel of the first planetary gear set is connected by a brake to the crankcase of the gearbox.

Description

technical field [0001] The present invention relates to the field of automobile machinery manufacturing engineering, and relates to an automatic transmission device, which includes a stepped planetary transmission used in the automatic transmission system of a running vehicle and is controlled by an electronic system and a hydraulic system . Background technique [0002] The drive train or transmission device that runs the vehicle is often used to convert the torque and speed of the engine to adapt to changes in road driving conditions, so as to ensure the movement of the vehicle, such as forward and reverse requirements. [0003] The automatic transmission includes a hydraulic power torque converter (torque converter), whose function is to use the kinetic energy of the working fluid to transfer torque from the crankshaft of the engine to the input end of the transmission. Generally speaking, the next step is to change the torque and speed of the engine by a planetary trans...

AI Technical Summary

Problems solved by technology

In addition, in this speed change device, the sun gear of the first planetary gear set is rigidly connected to the housing by means of additional components in the structure, which makes the structure of the speed change device complicated.

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