Transmission box for medium power wheeled tractor

Abstract

Medium-power wheeled tractor transmission box includes: gearbox housing, rear axle housing, main clutch shaft assembly, main transmission driving shaft assembly, idler shaft assembly, main transmission driven shaft assembly, auxiliary transmission gear shaft assembly Assemblies, crawler gear shaft assembly, bevel pinion shaft assembly, reversing control assembly, main transmission control assembly, auxiliary transmission control assembly. The gearbox housing and the rear axle housing are connected by fasteners, the main clutch shaft assembly, the main transmission drive shaft assembly, the idler shaft assembly, the main transmission driven shaft assembly, the reversing control assembly and the main transmission control assembly Assembled in the gearbox case, auxiliary transmission gear shaft assembly, crawler gear shaft assembly, pinion bevel gear shaft assembly and auxiliary transmission control assembly are assembled in the rear axle case, gearbox case and rear axle case The internal shafts adopt the form of spatial arrangement, so that the exterior presents a flat octagonal cross-section, which increases the distance between the lower part of the shell and the ground, increases the height of the ground clearance, and improves the passing performance of the whole machine.

Description

technical field [0001] The invention belongs to the field of tractors and relates to a transmission box of a medium-power wheeled tractor. Background technique [0002] At present, on various medium-power wheeled tractors produced in China, the transmission boxes are mostly 8+4 gears (ie: 8 forward gears and 4 reverse gears), 8+2 gears (ie: 8 forward gears) and 2 reverse gears), or 8+8 gears (namely: 8 forward gears and 8 reverse gears), the forward operating speed range is 2-35km / h, there are few gears, and the difference ratio of each gear is large, the operation The speed range is narrow, which makes it difficult to meet the needs of the increasingly wide range of agricultural machinery, engineering and transportation operations. At the same time, due to the constraints of space factors in the housing of the traditional medium-power transmission box, the shifting and reversing are all in the form of meshing sleeves or sliding gears. The power is large, the smoothness of ...

AI Technical Summary

Problems solved by technology

[0002] At present, on various medium-power wheeled tractors produced in China, the transmission boxes are mostly 8+4 gears (ie: 8 forward gears and 4 reverse gears), 8+2 gears (ie: 8 forward gears) and 2 reverse gears), or 8+8 gears (namely: 8 forward gears and 8 reverse gears), the forward operating speed range is 2-35km / h, there are few gears, and the difference ratio of each gear is large, the operation The speed range is narrow, which makes it difficult to meet the needs of the increasingly wide range of agricultural machinery, engineering and transportation operations. At the same time, due to the constraints of space factors in the housing of the traditional medium-power transmission box, the shifting and reversing are all in the form of meshing sleeves or sliding gears. The power is large, the smoothness of shifting is poor, and it is not easy to operate. In addition, the shafting arrangement in the traditional transmission box generally adopts the planar layout with the engine crankshaft as the center and the downward vertical direction (such as the attached figure 1 As shown), the cross-section of the transmission box shell is longitudinally rectangular, the lower part of the shell is closer to the ground, the ground clearance height is low, the passing radius is large, and the field passability is poor

Images