变形拖拉机坡道制动性能分析

摘要

近几年来,由手扶拖拉机变型而来的变形拖拉机,其爬坡能力强,操纵性、制动性及运输速度较原机型都有较大的改进,随着农村运输需求的不断增加,应用日益广泛.受变型拖拉机生产企业的技术及生产条件等因素的影响,目前这种拖拉机的综合性能还有待进一步改善.针对农村道路运输条件恶劣,尤其是我国南方地区,坡道多、道路条件差,研究变型拖拉机的坡道制动减速度和制动距离是十分必要的.该文建立了变型拖拉机坡道制动减速度和制动距离的数学模型,以富强-18Y变型拖拉机为例,分析了影响制动减速度和制动距离的因素,讨论了质心位置、附着系数和坡度角对它们的影响趋势和程度,为变型拖拉机的设计提供了理论依据.%Derivative tractor derived from walking tractor has excellent capacity of slope climbing, handling and braking, and the high transportation velocity, which has been used widely in China with the farm transportion demand increasing in recent years. At present,due to the influence factors such as the technology and the plant conditions, the all-round properties of derivative tractor must be improved. Because of the transportation conditions in China countryside, especially in south part, there are more hills and worse road, it is very necessary to study the braking deceleration and the braking distance of derivative tractor on slope. This paper establishes the braking deceleration and the braking distance mathmatical model of derivative tractor on slope, then taking the Fuqiang-18Y derivative tractor as an example, the influence of the position of the centroid adhensive coefficient and the angle of grade on braking deceleration, braking distance, and the effect trend and degree were analyzed.It can provide theoretical foundation for designing derivative tractor.