Design and Development of Fixture for Extraction of Pinion Assembly with Bearing Unit of Drive Gear SE344

The axle drive gear box is mounted on motor car axle. The bull gear of the axle drive gearbox is having interfernce fit on the axle. The Reaction rod is attached to axle drive gear box with the help of fasteners. On bogie transom, one side of axle drive gear box is fixed by the rubber bush of torque arm (reaction rod) while the other side is attached to axle by bull gear of driving gear. The driving gear is the main component which transmits the traction effort from the Traction motor to bogie. The axle drive gear box is fitted on both of the bogie and the motor axle. The driving gear being overhauled at an interval of 08 years of service. During overhauling all the bearings are needs to be replaced. Due to the design of gear box housing, the bearing of pinion shaft is infringed with the housing during extraction of the pinion assembly with bearing unit. During extraction it can damaged the housing of the gear case. The main purpose of this research to design a fixture which can hold the bearing and pinion can be easily extracted without damaging the housing of driving gear.