gearbox

Abstract

The invention discloses a speed changing box which comprises a front box, a back box and a front driving box. The front box comprises a front box body. A front box input shaft, a front box middle shaft and a front box output shaft are arranged on the front box body. The back box comprises a back box body. A first output shaft of the back box, a middle shaft of the back box and a second output shaft of the back box are arranged on the back box body. The front driving box comprises a front driving box body. A front drive middle shaft and a front drive output shaft are arranged on the front driving box body. According to the speed changing box, on the condition that a sliding sleeve of a front driving box synchronizer is connected with a fourth driving gear and on the condition that the sliding sleeve of the front driving box synchronizer is separated from the fourth driving gear, a tractor can respectively realize four-wheel driving and two-wheel driving. Consequently, the speed changing box enables the tractor to flexibly choose two-wheel driving or four-wheel driving according to different conditions, so that traveling requirements of the tractor on different operation working conditions can be met. Moreover, the speed changing box is large in number of gears and wide in changing range of the output speed ratio so as to enable the tractor to operate at relatively optimized traveling speed, and is good in energy-saving effect.

Description

technical field [0001] The invention relates to a reduction gear, in particular to a gearbox. Background technique [0002] For tillage machinery that is driven and pulled by a tractor and completes multiple operations such as subsoiling, rotary tillage and soil preparation at one time, its gearbox must have a large output torque, especially for areas with poor cultivated land conditions. The size and output mode of the output torque are more demanding. [0003] Existing land preparation machines are generally driven by two wheels, and the output torque of the gearbox is small. For areas with poor cultivated land environment, it is difficult for two-wheel drive tillage machines to meet the operation requirements. smaller. [0004] Therefore, it is necessary to improve the gearbox of the tillage machinery pulled by the existing tractor, so as to change its power output mode and increase its output torque. Contents of the invention [0005] In view of this, the purpose of...

AI Technical Summary

Problems solved by technology

[0003] Existing land preparation machines are generally driven by two wheels, and the output torque of the gearbox is small. For areas with poor cultivated land environment, it is difficult for two-wheel drive tillage machines to meet the operation requirements. smaller

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