A case of a successful repair of the vibration drive shaft of the Hummer HD130 roller    

As we all know, between the Hummer HD130 roller shaft vibration and vibration of the motor shaft connected by a spline, but after working for a certain time, the machine will therefore place spline wear and can not work normally in the construction site conditions for repair as soon as possible we worked out 3 programs: welding; pin joints; three claw plate connection.

The welding process is relatively simple, but the two coaxial cannot be adjusted, so it is undesirable; pin connection, the higher requirement for the processing technology, site conditions reach; and finally decided to use the three claw tooth type flange connection, namely in the drive shaft and the motor shaft is equipped with three claw tray joint power transmission shaft has three claws. Depending on the length and quality, it will produce a certain centrifugal force, the centrifugal force generated two axis misalignment in high speed will be very large, so the joint surface roughness higher to three in order to reduce the two claws; caused by uneven quality of the heart, in the two engagement claw in addition to a set of disk.

Main points of production:

1., because the spline wear does not hurt other parts of the vibrating motor shaft, and the original designed motor shaft can meet the needs of work, so we only need to drive the spline part of the motor shaft to keep the original optical axis 25mm..

2. the length of the original motor shaft is 47mm, which does not hurt the motor oil seal when the three claw plate is heated, and the thickness of the three claw socket is 45.5mm.

3. motor shaft connecting disc, and three claw shaft and three claw plate are connected between the interference fit, three claw plate heating insert to the motor shaft and the drive shaft on the motor: because this scheme can meet the requirements of the connection strength and stiffness, but also has a certain degree of flexibility. The transmission design. The machine must be calculated during startup and shutdown due to shear impact on the three roots of the claw a stress; and we should consider the three jaw plate balance, otherwise it will lead to excessive wear engagement at the other end of the drive shaft and the spline part two, will cause excessive wear and gear motor bearing, oil seal, or even stuck. When installed, coaxial two is better, because the drive shaft is short, in order to avoid the high temperature damage of oil seal assembly should take certain measures to protect the cooling oil seal, such as with a wet towel wrapped around the seal, and water cooling.

4. because the part of the motor shaft joins the three claw plate is less, the two can be welded to die when the motor shaft is inlaid with the three claw plate.

Through the above steps, we have successfully repaired the Hummer HD130 roller vibration drive shaft.