Load shift of tractor and load reversing transmission gear

Abstract

The invention relates to a tractor with a load shift and load reversing transmission device, which consists of four parts, namely a load shift variable speed device, a load reversing transmission device, a creeping shift and oil pump driving device, and a sector shift variable speed device, can transfer power of an engine to a rear axle, a front axle and a PTO (power take-off shaft) device, and canbe provided with a hydraulic oil pump. The whole transmission device comprises 4 load shift gears, 6 synchronizer shift gears and a creeping shift gear, can carry out load reversing, and can form 80 gears, namely 40 forward gears and 40 reverse gears; and the speed range is between 0.3 and 50 kilometers per hour, wherein both the load shift and the load reversing shift adopt electronic control shift.

Description

(1) Technical field [0001] The invention belongs to the field of tractors, and relates to a tractor with load shifting and load reversing transmission device. (2) Background technology [0002] At present, the gearboxes of domestic high-power wheeled tractors mostly use mechanical shifting methods such as meshing sleeves and synchronizers. When the tractor shifts gears, it is necessary to disengage the main clutch to cut off the engine power, and then shift to the required gear. The shifting is slow and affects Operating efficiency, but the manufacturing cost of the corresponding gearbox is lower. However, foreign high-power wheeled tractors mostly use load-shift gearboxes, that is, the shifting operation is performed directly without cutting off the engine power when shifting gears, and the shifting efficiency is high. There are mainly two structural types of load-shift gearboxes for tractors abroad, one is planetary transmission, and the other is fixed-shaft transmission....

AI Technical Summary

Problems solved by technology

Planetary load shift gearbox has few parts, small axial size, and compact structure. However, it is difficult to obtain an ideal speed ratio due to the influence of assembly and interlocking relationship of each planetary row. At the same time, it is difficult to process the planetary row and the manufacturing cost is high.

Fixed-axis drive load shift gearbox has many parts, large axial size, and convenient adjustment of speed ratio of each gear, but still has the disadvantages of high manufacturing difficulty and high cost

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