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东方红—75(54)拖拉机经常发生托带轮轴丝扣损坏的故障,由于该轴与侧支架安装孔的配合紧度大,修理难度大,很费工。为此,我们找到了故障的原因及解决办法。托带轮的结构如图所示。托带轮轴为心轴,托带轮依靠两盘407滚动轴承在该轴上旋转。托带轮总成组装后,两盘407滚动轴承之间的距离是由轴承隔套(54·33·408)的长度确定的,在轴端固定螺母上紧后,轴承内环、轴承隔套及螺母之间组成一体,不会产生相对运动而磨损。从图中可见,正确安装时,外
Dongfanghong -75 (54) Tractor often occur failure of the pulley shaft threaded buckle, due to the shaft and side bracket mounting hole with the tightness, repair difficult, it is laborious. To this end, we found the cause of the malfunction and solutions. The structure of the pulley as shown. The carrier axle is the spindle, and the carrier wheel rotates on the axle by two 407 bearings. After the carrier assembly, the distance between the two 407 bearings is determined by the length of the bearing spacer (54 · 33 · 408). After the shaft end fixing nut is tightened, the bearing inner ring, bearing spacer, and The nuts are integrated and will not wear out due to relative movement. Can be seen from the figure, the correct installation, outside