摘要MicrosoftWord文档.docVIP

履带式拖拉机变速器的改进设计Ⅲ 摘 要 变速器用于转变发动机曲轴的转矩，以适应在起步，加速，行驶以克服各种道路障碍等不同行驶条件下对驱动轮牵应引力及车速的不同要求。 在我国，由于技术条件的限制，拖拉机所用的变速器都传统的机械式的有级变速器，这种变速器的变速比是几个固定值。它的结构简单，容易制造；缺点是由于各挡的转速不同，换挡时不可避免要产生冲击，对齿轮产生损坏。这要用啮合套来解决，使结构复杂。由于传动比固定，发动机只能够近似的在最加区域工作。本次设计采用这种变速器。 本次设计主要参照东方红1302R/1302RA履带式拖拉机设计，使用说明书上的基本参数，来完成机械式四轴6+2挡变数器设计任务。适用于水田、旱地及菜园和坡度不大的丘陵地区的农田作业、农业运输等，还可作为农村各种固定作业之动力ABSTRACT transmission is used to change engine crank shaft revolution regulation, to fit in withlead the different request responding to the gravitation and speed of a vehicle understarting , acceleration, run to overcoming the various road obstacle In our country, restrict since the technology is conditional, dyadic having of the tradition machinery all is worth transmission used by tractor than level transmission, this transmission speed change being that are several fixed. Its structure is simple , easy to make; The shortcoming is that the rotation rate is different since every blocks , inevitable essential points creation pounds , produces to the gear wheel a breakdown when shifting gears. Want to come to solve with synchronism implement , make structure complicated. Since the transmission ratio is fixed , the engine can, similar works add area most. Capital is designed time adopt this transmission The tractor designs 1302 R/1302RA capital is designed time consulting the East is red mainly , the upper fundamental operating instruction manual parameter, comes to accomplish dyadic four scrolls of 6 + 2 gear variables implements of machinery designing a mission. Farmland school assignment , agriculture transportation applying to the paddy field , dry land and kitchen garden and no big knobs of slope etc., may be various driving force of fixing school assignment of rural area, First, when secretly scheming against want the rotation rate ,general transmission ratio according to the engine and the tractor , ascertain the transmission ratio that transmission blocks respectively. May adopt same method to ask out to re