根据混凝土搅拌运输车使用情况的调查,我们发现搅拌筒托轮故障频率较高,其故障主要表现在轴承早期损坏、卡滞不转、转动异响及表面划伤等。本文针托轮存在的上述故障进行分析,并提出解决方法。托轮支撑搅拌简形式如图1所示。1.轴承早期损坏(1)原因分析托轮是用1对“背靠背”安装在心轴上的圆锥滚子轴承支撑。托轮轴承损坏有多种原因,如轴承座有缺陷、轴承安装不对中、心轴与轴承配合间隙不合理、轴承润滑和密封不良、搅拌筒振动 According to the investigation of the usage of concrete mixer truck, we found that the frequency of the failure of the mixer drum is high, and its failure is mainly manifested in the early bearing damage, stuck jam, abnormal rotation and scratches on the surface. In this paper, the analysis of the above-mentioned fault of pin wheel and the solution to it are put forward. Support wheel stirring simple form shown in Figure 1. 1. Bearing early damage (1) Analysis of the reasons Roller is a pair of “back to back ” installed in the mandrel tapered roller bearing support. Bearing wheel bearing damage for a variety of reasons, such as bearing seat defects, bearing installation is not, the mandrel and the bearing with the gap unreasonable, bearing lubrication and sealing bad, mixing tube vibration