Parallel type double-flow variable-speed drive device

Abstract

A parallel type double-flow variable-speed drive device comprises a first power input unit, a second power input unit and a power output unit. The first power input unit comprises a first transfer case, a first shaft, a first telescopic shaft, a first hydraulic pump, a driving gear of gears of odd numbers and a synchronizer. The second power input unit comprises a second transfer case, a second shaft, a second telescopic shaft, a second hydraulic pump, a driving gear of gears of even numbers and a synchronizer. The power output unit comprises a third shaft, a hydraulic motor and a driven gear of gears of odd and even numbers. The first shaft, the second shaft and the third shaft are arranged in parallel, the driven gear of gears of odd and even numbers of the third shaft is meshed with the driving gear of gears of odd numbers of the first telescopic shaft or / and the driving gear of gears of even numbers of the second telescopic shaft. An oil discharge outlet of the first hydraulic pump leads to an oil supply port of the hydraulic motor, and an oil discharge outlet of the second hydraulic pump leads to an oil supply port of the hydraulic motor. The first shaft or the second shaft serves as a power input shaft of the device, and the third shaft serves as a power output shaft of the device.

Description

technical field [0001] The invention belongs to a vehicle transmission system, and in particular relates to a variable-speed transmission device and a hydraulic control system formed by two mechanical-hydraulic double-flow transmission lines connected in parallel. Background technique [0002] The variable speed transmission system is an integral and important part of the vehicle. According to power transmission and transmission mode, modern vehicles mainly adopt mechanical transmission system, hydraulic transmission system and electric transmission system. [0003] The mechanical variable speed transmission system is mainly a transmission system powered by the engine and composed of various types of mechanical transmission devices or electro-hydraulic transmission devices. According to the shifting operation mode, it is divided into manual and automatic transmission systems. In the automatic transmission system , according to the form of the shifting actuator, it is divide...

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Problems solved by technology

[0003] The mechanical variable speed transmission system is mainly a transmission system powered by the engine and composed of various types of mechanical transmission devices or electro-hydraulic transmission devices. According to the shifting operation mode, it is divided into manual and automatic transmission systems. In the automatic transmission system , according to the form of the shifting actuator, it is divided into semi-automatic, automatic and dual-clutch automatic transmission systems. Among them, the dual-clutch automatic transmission system can be considered as a combination of two mechanical manual transmission systems and automatic transmission devices. It can realize shifting into gear presets to make the shifting process more rapid and smooth, so its application has been continuously expanded; the characteristics of the mechanical variable speed transmission system are: mature technology, perfect manufacturing process, high transmission efficiency of the system, low production cost, and wide application Extensive, but it is difficult to further effectively improve the optimal matching with the engine

[0004] The hydraulic transmission system, also known as the hydrostatic transmission system, is mainly composed of the engine as the power, the hydraulic pump, the hydraulic motor, the hydraulic servo control and the actuator and the hydraulic pipeline. It is characterized by hydraulic oil Liquid is the energy transmission carrier to transmit power, the system has few mechanical transmission parts, simple structure, wide range of transmission ratio and easy adjustment, stable operation, low vibration and noise, relatively easy control and infinitely variable speed, but the hydraulic motor as the driving element works The speed should not be too high, and the adaptability to the transmission requirements of the vehicle in medium and high-speed driving conditions is relatively poor

[0005] The electric transmission system is a transmission system composed of electric motors and simple mechanical mechanisms. It is characterized by a relatively simple structure of the transmission system, low vibration, noise and pollution emissions. The cruising range is limited and it is difficult to meet the needs of users

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