Hydrostatic stepless transmission transmission system of small and medium power gardening tractors

Abstract

The invention discloses a hydrostatic continuously variable transmission system of a medium-power low-power garden tractor. The hydrostatic continuously variable transmission system of the medium-power low-power garden tractor comprises a power intake assembly, a hydrostatic continuously variable transmission assembly, a rear-drive transmission assembly, a power output transmission assembly, a front-drive transmission assembly, an over-bridge housing, a front cover, a middle power output housing, a rear axle housing and a transfer case housing. The over-bridge housing, the front cover and the middle power output housing are respectively connected with the rear axle housing by using fasteners; the transfer case housing and the over-bridge housing are connected by using the fasteners; the pump power intake assembly is arranged in the over-bridge housing; the hydrostatic continuously variable transmission assembly is arranged on the end face of the front cover; the rear-drive transmission assembly is arranged in the rear axle housing; the power output transmission assembly is arranged in the rear axle housing and the middle power output housing; the front-drive transmission assembly is arranged in the over-bridge housing and the transfer case housing; all shafts are spatially arranged. The transmission system is compact in structure, convenient to control and reliable in use.

Description

technical field [0001] The invention belongs to the field of tractors, and relates to a hydrostatic continuously variable speed transmission system of a small and medium power gardening tractor. Background technique [0002] At present, most of the various small and medium-power tractors produced in China are mainly used in agricultural farming, taking into account high-speed transportation operations. Its transmission system adopts mechanical gear shifting. Although it can realize the step-by-step conversion between multiple gear speeds, because the speed of each gear is a fixed value, when engaging in a certain form of work, you can only choose the gear that matches the speed of the gear. This kind of operation requires similar speed to operate, and it is difficult to exert the optimal operation efficiency. Due to the large or small step differences in mechanical shifting, the shifting force is large when the speed of each gear is changed, the reliability and smoothness o...

AI Technical Summary

Problems solved by technology

Its transmission system adopts mechanical gear shifting. Although it can realize the step-by-step conversion between multiple gear speeds, because the speed of each gear is a fixed value, when engaging in a certain form of work, you can only choose the gear that matches the speed of the gear. This type of operation requires a similar speed to operate, and it is difficult to exert the optimal operating efficiency

Due to the large or small step differences in mechanical shifting, the shifting force is large when shifting the speed of each gear, the reliability and smoothness of shifting are limited, and it is difficult to meet the comfort requirements of drivers and passengers.

In addition, due to the consideration of agricultural production conditions, the drive train is often designed with high strength and large shaft spacing

From the appearance, the overall size of the entire transmission system is relatively large, and it is impossible to realize the small, compact and flexible gardening machine layout requirements from the structure.

At the same time, due to the large weight, after the complete tractor is equipped, the compaction effect on the ground and the damage to the soil surface during driving are obvious, especially not suitable for the working environment of lawn gardening

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