Vibration Characteristics of Reduction Gears with Inclined Planetary Gear and Arc Tooth Bevel Gear

Using the reduction gears with inclined planetary gear and arc tooth bevel gear, the vibrational accelerations in vertical direction of this system, with and without the backlash, are measured by changing the load torque and the input shaft speed. And, the materials of cylindrical pin attaching part of fixed and output gears are changed to alloy tool steel and cast iron, and the vibrational accelerations of this system are measured, and the results are discussed. The results are as follows : In the vibration characteristics of this system, meshing frequency component is main, and the natural frequencies caused by the torsional vibration of gears and the vibration of casing supporting the input shaft, are appeared. The vibrational acceleration of the system without the backlash is slightly lower than that with the backlash. Meshing frequency component has remarkably appeared in the vibrational acceleration, when the material in the cylindrical pin attaching part was changed from alloy tool steel to cast iron. However, in this system, the effect of the high damping capacity of gray cast iron has not appeared.