Multi-power distribution mode mechanical and hydraulic composite transmission device and control method

Abstract

The invention discloses a multi-power distribution mode mechanical and hydraulic composite transmission device. The multi-power distribution mode mechanical and hydraulic composite transmission devicecomprises an input shaft, a flow dividing mechanism, a mechanical transmission assembly, a hydraulic transmission assembly and an output shaft; the input shaft is connected with the mechanical transmission assembly and the hydraulic transmission assembly which are connected with each other in parallel through the flow dividing mechanism; the mechanical transmission assembly and the hydraulic transmission assembly are connected with the output shaft simultaneously; and three types of transmission such as pure hydraulic transmission, mechanical and hydraulic composite transmission and pure mechanical transmission are realized through combined switching among gear-shifting components. The multi-power distribution mode mechanical and hydraulic composite transmission device has the following beneficial effects: multiple gears are optional, multiple power distribution modes can be provided according to complicated operation working conditions, and the transmission property of the mechanicaltransmission and the stepless speed-regulating property of the hydraulic transmission can be completely utilized, so that the operation efficiency, the power property and the economical property of vehicles are improved. A mechanical gear shifting device can realize engine braking by a one-way clutch, and the service life can be prolonged by uniformly using each gear-shifting component.

Description

technical field [0001] The invention relates to a transmission device and a control method thereof, and in particular provides a mechanical-hydraulic composite transmission device with multiple power distribution modes and a control method thereof. Background technique [0002] When the engineering operation equipment starts or moves, the transmission device is required to provide a transmission ratio with high torque and low speed, and it is required that the transmission device can provide a transmission ratio with small torque and high speed during the transition process. Therefore, the complexity of the working conditions of engineering operation equipment determines that its transmission device has higher requirements and more complex structure than ordinary vehicle transmission device. The transmission device of engineering operation equipment has higher requirements on transmission ratio and torque at the same time. [0003] The transmission device has an important in...

AI Technical Summary

Problems solved by technology

However, the transmission device of traditional construction machinery is composed of a hydraulic torque converter and a gearbox, commonly known as a dual variable system; the function of the hydraulic torque converter is to form a non-rigid connection between the engine and the It is transmitted to the gearbox; the transmission ratio conversion of the final engineering operation equipment is realized through the gear switching of the gearbox, which belongs to the traditional mechanical transmission mode and cannot meet the transmission ratio requirements of complex working conditions

[0004] At present, engineering operation equipment has a hydraulic transmission system that drives a hydraulic pump by an engine and then drives a hydraulic motor to realize walking. However, the transmission medium of this type of hydraulic transmission system is hydraulic oil, and high-pressure oil will be generated during the transmission process. The performance requirements are high, the pressure resistance of hydraulic components is higher, and the cost of components is higher; and the transmission efficiency is not high compared with mechanical transmission systems

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