A dual power input type three-speed crawler vehicle transmission

Abstract

The invention relates to a dual-power input type three-gear tracked vehicle transmission. A power input mechanism, a dual-power input mechanism, a three-gear speed changing and braking mechanism, a differential type driving mechanism, a left side track driving mechanism, a right side track driving mechanism and a power output mechanism are installed on a box body. According to the transmission, a mechanical and hydraulic parallel-connection type dual-power input device, a differential type steering device, a three-speed gear shifting device, a built-in braking device are adopted, and gear rings of planetary gear mechanisms at the two sides of a driving wheel of the differential type steering device are controlled to rotate in the positive direction and in the negative direction through a hydraulic motor, so that driving efficiency and control convenience of a tracked vehicle can be improved effectively, the steering accuracy is improved, the rotation speed matching range of efficient driving is enlarged, the applications of the tracked vehicle are increased, the driving safety is improved, and the problems that in an existing tracked vehicle, the transmission efficiency is low, the driving cornering drag is high, the control is difficult, the mud accumulation is severe when the tracked vehicle turns on the edge of a field, and a braking device is complex are solved.

Description

technical field [0001] The invention relates to a double power input type three-speed crawler vehicle transmission. Background technique [0002] my country is the largest rice producer and consumer in the world, with an annual planting area of ​​about 28.6 million hectares, accounting for 1 / 5 of the global rice planting area, and an annual output of 185 million tons of rice, accounting for 1 / 3 of the world's total output. The southern rice field area is mainly Including Hunan, Jiangxi, Guangdong, Guangxi and other ten provinces, rice production accounts for more than 60% of the country, and it is the main rice producing area in my country. Paddy fields in the south mainly grow rice and rapeseed crops. The paddy fields in the south are flooded almost all the year round, and there is no freezing in winter. Destroy the structure of the plow bottom layer, resulting in soft plow bottom layer. After repeated operation of the wheeled operation machinery, the depth of the bottom o...

AI Technical Summary

Problems solved by technology

However, in order to improve the driving safety of tracked vehicles, some tracked vehicles are equipped with braking devices. These braking devices are usually installed near the driving wheels. Since they are installed at the end of the transmission system, the braking devices often use dry friction disc brakes. The brake structure is large, the left and right wheels are symmetrically arranged, the number is large, and the braking consistency is poor

[0005] At the same time, due to the continuously variable transmission device integrated with the hydraulic pump and motor, although the stepless transmission can be realized by changing the angle of the swash plate of the hydraulic pump, during the stepless change of the speed, when the device works near the rated speed, the efficiency is high and the torque output Stable, but when working at low speed, the efficiency of hydraulic transmission is reduced, and the output torque of hydraulic motor is small, which limits the efficient working range of tracked vehicles

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