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根据履带推土机作业要求和悬架结构特点,绝大多数采用半刚性悬架,有些高速行驶的履带推土机采用弹性悬架。推土机作业时,铲刀位置随弹性元件产生附加的振动,对铲刀切削深度有较大的影响。因此,悬架结构及其刚性,是引起推土机作业面不平整度(作业表面起伏不平的垂直偏差,也称铲土不平整度)的重要因素。由于作业面不平整度的数值为铲刀振幅的倍值,减小铲刀的振幅,可获得作业面较小的不平整度,使推土平稳。本文基于铲刀从土中开始提升瞬间,对推土机悬架的振动作理论分析,并举例计算和实测分析。
According to the requirements of crawler bulldozers and suspension structural features, most of the semi-rigid suspensions are used, and some high-speed crawler bulldozers use elastic suspensions. During bulldozer operation, blade position generates additional vibration with the elastic element, which has a greater influence on the blade cutting depth. Therefore, the suspension structure and its rigidity are important factors that cause the unevenness of the work surface of the bulldozer (vertical deviation of the surface of the working surface, also called unevenness of shoveling). Since the value of the unevenness of the work surface is the value of the amplitude of the blade, the amplitude of the blade can be reduced, and the unevenness of the work surface can be obtained and the dozing can be performed smoothly. This paper analyzes the vibration of the bulldozer suspension based on the instant that the blade starts to lift from the soil. The calculation and measurement analysis are also given.