Hydraulic transmission variable speed gear

Abstract

The present invention discloses a hydraulic speed transform comprising a hydraulic pump connected with dynamical input shaft, the hydraulic pump connects a plurality of hydraulic motor connected in parallel in pipe connecting type, the output shafts of all the hydraulic motors are concentric and connected by each other, oil enter ends of all the hydraulic motors have gear control valves respectively, all the hydraulic motors have internal circulation short circuit devices respectively which comprise a crossover piping connecting the oil outlet and inlet of the hydraulic motor when the pressure oil input to hydraulic motor is interrupted, the crossover piping has crossover control valve with opposite state to the switch state of the gear control valve. The present invention reduces variable transmission resistance and noise pollution, eliminates the self-priming resistance of hydraulic motor to improve the dynamical transmission efficiency and saves energy efficiently.

Description

technical field [0001] The invention relates to a transmission device, in particular to a hydraulic transmission speed change device adopting hydraulic transmission. Background technique [0002] The deceleration or acceleration transmission devices used on existing vehicles and other mechanical equipment mostly use gear transmission, which transmits power by the shaft and is equipped with bearings. In this way, when working, the bearings and gears will generate friction. The resistance caused by the large number of gears and bearings and the viscosity of the gear lubricating oil causes waste of power, reduces mechanical efficiency, and the gears will generate noise during transmission and pollute the environment. At present, the hydraulic transmission device that people use is to use a hydraulic pump to drive one or more hydraulic motors to drive the output shaft to achieve power variable speed output. Although the above problems can be solved, there are certain defects in ...

AI Technical Summary

Problems solved by technology

[0002] The deceleration or acceleration transmission devices used on existing vehicles and other mechanical equipment mostly use gear transmission, which transmits power by the shaft and is equipped with bearings. In this way, when working, the bearings and gears will generate friction. The resistance caused by the large number of gears and bearings and the viscosity of the gear lubricating oil causes waste of power, reduces mechanical efficiency, and the gears will generate noise during transmission, polluting the environment

At present, the hydraulic transmission device that people use is to use a hydraulic pump to drive one or more hydraulic motors to drive the output shaft to achieve power variable speed output. Although the above problems can be solved, there are certain defects in the control of the hydraulic motors. After controlling the closing of the hydraulic motor, the hydraulic motor will have self-absorption resistance, which will affect the power output and reduce the power transmission efficiency

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