Hydraulic variable-speed transmission device

Abstract

The invention discloses a hydraulic variable-speed transmission device. The transmission device comprises a large hydraulic cylinder, a small hydraulic cylinder, a hydraulic oil tank, an electrodeless speed adjusting device and a driving motor, wherein the large hydraulic cylinder and the small hydraulic cylinder are communicated with each other through an oil conveying pipeline; a two-position two-way solenoid valve is arranged on the oil conveying pipeline between the large hydraulic cylinder and the small hydraulic cylinder; the large hydraulic cylinder and the small hydraulic cylinder are respectively communicated with the hydraulic oil tank through the oil conveying pipeline; when the driving motor works, a main oil pump is driven to work by hydraulic pressure for transmission, a small-piston crankshaft is driven to operate by a variable-speed transmission output device, and the driving motor simultaneously drives a small-piston input oil pump and a large-piston output oil pump to work through a shaft coupler and the electrodeless speed-adjusting device. The hydraulic variable-speed transmission device disclosed by the invention is provided with the advanced electrodeless speed-adjusting device, and the speed and the pressure of the oil amount of each hydraulic pump can be controlled according to programmed work procedures, thereby realizing the aim of speed and pressure adjustment; and particularly, a Pascal hydraulic principle is utilized to improve the conversion rate of source power by times.

Description

technical field [0001] The present invention relates to the field of speed change equipment, in particular to a hydraulic speed change transmission device, which is mainly used in stepless automatic transmissions of modern industrial automation program control, and can also change the program control mode (industrial automation adopts PLC control, and automobiles can use single-chip microcomputer fixed programs) When used in the automotive industry, variable speed transmission is realized by adjusting the conversion of hydraulic pressure and energy. Background technique [0002] Almost all existing transmission devices use mechanical transmission gear shifting to transmit output power. For vehicles: traditional hydraulic automatic transmissions automatically change gears according to changes in vehicle speed and throttle opening. The gear control method is to convert the vehicle speed and throttle opening signal into control oil pressure through mechanical means, and add the...

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Problems solved by technology

[0003] In the process of realizing the present invention, the inventor has found that the prior art has at least the following problems: the speed change of the automobile engine and the speed change of the motor in the prior art all consume a large amount of energy in the process of speed change and transmission of power, and the power energy The conversion efficiency has not been brought into full play, and the mechanical transmission efficiency is low

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