滚轮简介

Brief introduction to excavator bottom roller / bulldozer undercarrier parts

Track Roller also called bottom roller, 下辊, 是挖掘机重要的底盘部件 / 推土机/履带. 在结构上, the excavator bottom roller can be divided into unilateral roller and bilateral roller; 挖掘机和推土机的支撑轮一般都是黑漆, 推土机的支撑轮一般都是黄色漆. 如果客户有特殊颜色, 他们也可以定制.

The wheel body of the supporting wheel is generally made of 50Mn, 40Mn2 and other materials. The main process is casting or forging, machining, 然后热处理. The hardness of the wheel surface after quenching shall reach hrc45 ~ 52 to increase the wear resistance of the wheel surface. The machining accuracy requirements of the supporting axle are relatively high. 一般来说, NC machine tools are required to meet the requirements.

这 track roller for excavator is assembled from the wheel body, roller shaft, 轴套, 密封圈, end cover and other related parts.

Requirements for excavator bottom roller assembly:

1. All parts shall be strictly inspected and cleaned before assembly;

2. Before assembly of shaft sleeve and straight shaft, the mating surface shall be coated with a small amount of engine oil;

3 the floating oil seal ring shall be assembled in pairs, and its sealing surface shall be coated with grease; The contact surface between O-ring and floating oil seal ring shall not be coated with grease, and the O-ring assembly shall not be distorted;

4. The total installation force of floating oil seal ring is 450 ~ 500N; To ensure that the axial clearance of the assembled rear wheel body is 0.4 ~ 0.9mm, and the wheel body can be rotated by hand. The hand feels some resistance torque, but there is no jamming;

5 before filling the assembly oil chamber with oil, seal it with 0.4MPa air pressure at the screw plug, and put it into water for 1min without bubbles;

6 after assembly, run in shall be carried out, and then the wear debris shall be cleaned, and the impurity mass in the cavity shall not exceed 0.12g;

7. The floating seal ring shall be free from defects such as pores and scratches.