摘 要

本文分析了本课题研究的目的及意义，对机耕船传动系统的发展现状与研究趋势进行了初步探讨。在对机耕船的作业环境以及农艺需求进行研究分析之后，进行了离合器的选型和动力输出方式的选择。在此基础上选择机耕船四驱传动系统中变速器与分动器的结构形式并确定了传动方案。依照所确定的传动方案，展开变速器与分动器具体结构以及内部零部件的设计计算，包括传动齿轮、轴以及换挡装置的设计。该四驱传动系统主要根据我国目前机耕船的发展现状而设计，为改善目前主要生产的后轮驱动三轮式机耕船，加大了牵引功率，四驱系统对深泥脚水田以及旱田的农艺适应性更强，提高劳动生产率，有利于减轻劳动强度。四轮驱动机耕船是今后机耕船的发展趋势。

关键词

机耕船；传动系统；变速器；分动器

ABSTRACT

This paper analyzes the purpose and significance of researching this project, and gives a preliminary discussion on the current development and research trends of transmission system of boat tractor. After analyzing the operating environment and the agronomic needs of the boat tractor, this paper shows the selection of clutch and the form of Power Take Off. On these basis, choosing the structure of gearbox and Sub-actuator in system of the boat tractor to determine the transmission scheme. According to the determined transmission scheme, expand the design of gearbox and Sub-actuator and the internal parts in them, including the design of the transmission gears, shaft and shifting device. This design of the four-wheel drive transmission system is primarily based on the current development status of the boat tractor in our Country, to improve the rear-wheel drive three-wheel boat tractor which is now being mainly produced. In this new transmission system, the traction power is increased and it enhances the tractor’s adaptability in the working environment, which can increase labor productivity and reduce labor intensity. The four-wheel drive boat tractor will be the trend of development in this field.

KEY WORDS

Boat tractor; Transmission system; Gearbox; Sub-actuator