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履带式机械,尤其是进行土石方工程的机械,它们在强烈的磨料磨损和冲击载荷下工作,工作条件十分恶劣。除此以外,四轮一带(支重轮、引导轮、托链轮、驱动轮和履带板)还承受着整机的总重量。链轨表面与轮面之间存在着很大的挤压应力,因此,磨损非常严重,故障率较高。据调查,履带式机械行走系故障率占整机故障的40～70％左右,其中行走系中损坏最严重的是四轮一带,有的还不到一个大修期就出现早期损坏。为了更好地修复四轮
Crawler machines, especially those used for earthwork, work under severe abrasive wear and impact loads and work in poor conditions. In addition, the four wheel belt (roller, guide wheel, carrier sprocket, driving wheel and track shoe) also bear the weight of the whole machine. There is a large compressive stress between the surface of the chain rail and the tread surface, therefore, the wear is very serious and the failure rate is high. According to the survey, the failure rate of crawler-type mechanical running system accounts for about 40-70% of the total machine faults, among which the most serious damage in the running system is in the four-wheel area, and some of them fail to reach the early stage of damage during the overhaul period. In order to better repair four wheels