The inspection found that the bearing sleeve is mainly due to fragile parts will form a period of time as shown in Figure 1 (a) shows the ladder, has not been set tight on the shaft sleeve, the sleeve top end of the ladder, sleeve and shaft can cause the formation of a tight fit. Fix:
1) the location of the ladder above the point wore off, use a ruler to place watched no light shall prevail, as shown in Figure 1 (b)
Figure 1 shaft wear and repaired structure
2) removal of the big end bearing sets trumpet 8-10mm.
3) As the eccentric shaft thread is damaged, can not be nuts are 16mm thick steel plate using a lathe ring, ring set small end diameter and bearing the same inner diameter, outer diameter cylindrical nut with the same sets of bearings.
4) ring, nuts, bearings and set with a place, it will ring with the axis of symmetry points 6 points uniform welding, each weld 20mm. Intermittent welding should not let too much heat axis.
5) After welding, the ring nut to tighten, so that the bearing sleeve to move backwards and the fastening axis, which is especially important.
6) Finally, the ring and bearing nut, welding with a welding points 2 points, so nuts, you can weld 10mm long.
Bearing parts of the assembly shown in Figure 2.
Figure 2 structure of the bearing assembly components
After the demolition as long as the solder joints can be rubbed off, using this method in more than one year after the bearing service life.