What are the problems in the structure of the rear dump skip car at present?

1. Due to the high speed of the wheels on the running and stagger curves, the axle assembly needs to bear the force of large axial force alternating load. The force acts on the three petal shaped cover fastened with three bolts through the two bearing housings. However, the tightening torque of the three bolts is often uneven, and the specified rated torque value is often ignored. Therefore, the bolts are easy to loosen in actual use, and the bearing clearance cannot be guaranteed, Thus, the reliability and service life of the bearing are reduced, and even a major accident of wheel swing may occur.

2. The clip steel plate welded on the shaft is to prevent the shaft from rotating. However, due to the unreasonable structure, the wheel shaft and the skip support slip and swing, causing serious wear of the shaft and support. Moreover, the clip is not in a good stress state, so it is easy to crack and deform.

3. Due to the insufficient hardness and poor wear resistance of the contact surface between the wheel and the rail, the wheel wears quickly and has a short service life. It has to be repaired by welding or replaced with a new wheel within a few months, which seriously affects the normal production of the mine.