Convergence type hydraulic and mechanical continuously variable transmission provided with double planet rows

Abstract

A convergence type hydraulic and mechanical continuously variable transmission provided with double planet rows comprises an input shaft, an output shaft, a power output shaft, a hydraulic transmission assembly, a mechanical transmission assembly, a double-planet-row mechanism assembly, a gearshift mechanism assembly and a power output gear pair, wherein power input by the input shaft is shunted by the hydraulic transmission assembly and the mechanical transmission assembly respectively and is converged through the double-planet-row mechanism assembly, and the power after convergence is output through the gearshift mechanism assembly and the output shaft; and the input shaft drives the power output shaft to output the power through the power output gear pair. The continuously variable transmission has the benefits as follows: 1. shifting between the pure hydraulic gear and the hydraulic mechanical gear of the transmission is achieved through rotation speed of an engine and a centrifugal block clutch, and the operation is convenient and reliable; and 2, the centrifugal block clutch is replaced with an electromagnetic clutch, and the control is more accurate.

Description

technical field [0001] The invention relates to a continuously variable transmission, in particular to a double planetary confluence hydraulic mechanical continuously variable transmission for tractors or engineering vehicles. Background technique [0002] During the driving process, the load of the vehicle changes with the road conditions and driving conditions, especially for non-road vehicles such as high-horsepower agricultural vehicles and engineering vehicles, which have large transmission power, harsh working environment, and frequent fluctuations in external loads. The gearbox is required to change the torque and speed in a timely manner to adapt to the continuous change of the actual load, so as to ensure the power and fuel economy of the vehicle. Although the traditional stepped transmission can meet certain requirements through shifting gears, it can only transmit power according to a fixed transmission ratio and cannot achieve continuous speed change. If the gear...

AI Technical Summary

Problems solved by technology

Although the traditional stepped transmission can meet certain requirements through shifting gears, it can only transmit power according to a fixed transmission ratio and cannot achieve continuous speed change. If the gear is increased, the mechanical structure of the transmission will be more complicated and the cost will increase , the operation is difficult, which seriously restricts the improvement of its performance

[0003] The traditional mechanical transmission cannot match the complex working conditions of agricultural machinery due to gear limitations, which reduces the transmission performance of the vehicle; the hydraulic transmission developed in recent years has the characteristics of small transmission power and low efficiency due to the limitation of manufacturing technology

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