A transmission shaft bearing damage after checking and troubleshooting - bearing knowledge

A CA6440 light bus, after traveling 40000 kilometers, continuous transmission after the first axis bearing ( 50306 #) Damage to the problem. In the process of eliminate this problem, several overhaul transmission, are not found abnormal phenomenon; Measurement of the torsion bar spring adjustment screw, height of 42 mm, along with rules specification; Check the torsion bar spring with both ends fixed arm to take the position of the keyway between - — The two pull rod collapse all check, didn't also found the problem. Just to the left of the torsion bar spring adjustment screw with fixed arm after the rubber pad is damaged, change after the rubber gasket, problem clear. Has more than 5000 kilometers, the bearings still work properly. CA6440 light bus, the front suspension using vertical torsion bar spring independent suspension type, after connecting rods connected with the frame and the steering knuckle. Control arm cohesion under torsion bar spring after twisting arms and, under the control arm and through beam and frame of corresponding form before bearing. Torsion bar spring after a fixed arm, are connected to the transmission bearing beam adjustment screw, bearing after transmission support beam and frame are connected. By the connecting rod is transmitted in all directions of force and moment, accept change torque by a torsion bar spring. Car, in the process of driving the front wheels when you meet the degree of the impact of the direction of the front wheel, steering knuckle after torsion bar spring to a transmission support beam and frame; The impact of the front wheel in the vertical direction, the front suspension with torsion bar spring into change torque, spread to transmission support beam and frame. Front wheel by various energy of impact force and moment, by the tire, shock absorber, steering knuckle, spring bar, transmission beam and frame parts gradually absorbed, so as to ensure the comfort and peace of the car. On both sides in order to make the front wheel in the direction of the force and moment, can effectively absorb and cost of torsion bar spring, when the device to add certain torque. The torque is equivalent to a big spring, with vibration and shock absorber with play, but also effectively absorb from every direction of the front wheel force and moment produced by the energy. In order to make the two spring torsion bar has the same torque, the torsion bar spring operating device and adjust the required strict in accordance with the technical specification, such ability ensure the two front wheels in the process of transmitting force and moment and energy absorption to reach equilibrium. The car's rod spring adjustment screw damage to the rubber mat is when the car in a static adjustment screw height differences, but is equivalent to increase the length of the lever on the left spring adjustment screw, torque is equal to the reduced left torsion bar spring. Vehicle movement process, the relevant parts in transmission force and moment and absorbing energy, will produce the sizes and unbalanced phenomenon. Transmission and transfer from the front wheel force and moment and absorb energy beam directly connected, but also transmitted between a machine and drive axle force and moment. Therefore, tie rod spring adjustment screw rubber gasket damage, unilateral transmission in the process of loading, the 'unbalanced' level will increase, and one of the results of this 'unbalanced' role, is to make the connection transmission and a machine's main parts - — The first axis transmission 'foorn' evil, stress points to focus on supporting both before and after the transmission of the first shaft bearings. After before bearing for sliding bearing, bearing for rolling bearing, sliding bearing is bigger than rolling bearing resistance, but the damage resistance is strong, continuous damage to the bearings after forming the first shaft transmission.