DRIVESHAFT 3 1.3. DRIVE SHAFT PARTS: SEALS: Driveshaft assemblies use inboard and outboard joint seals. The inboard and outboard seals are made of thermoplastic material. The thermoplastic material performs well against normal handling and operational wear conditions. However, it is not strong enough to withstand abusive handling or damage due to objects such as sharp tools or the sharp edges of any other surrounding component in the vehicle. The functions of the seal are as below: To protect the internal parts of the inboard and outboard joint by protecting the grease from surrounding detrimental atmospheric conditions such as stones, dirt, water, salt, etc. Facilitate angular and axial movement as applicable for inboard and outboard joints. CLAMPS: These are made of stainless steel. The clamps provide a leak proof connection at housing and axle shaft for the inboard and outboard joints. OUTER JOINT (OUT BOARD JOINT): The outer joints use the Constant Velocity (CV) joint design, which is the standard outboard joint for front wheel drive cars. It is a fixed centre ball type joint. The outer housing is made using special steels by cold forming process followed by heat treatment. The cold-formed surfaces give superior wear resistance and increased joint life. The main function of the outboard joint is to allow the vehicle’s wheels to turn during steering operation or have a steer capability. INNER JOINT (IN BOARD JOINT): This is a Constant Velocity universal joint radically self-supported and permitting axial movement consisting of a housing directly connected to the axle shaft through three equally spaced transmission mounted balls. These are made of special steels through complex forming process followed by heat treatment. The main function of the inboard joint is to allow the half shaft assembly to compensate for suspension movement in the vehicle by allowing the shaft to move axially or stroke in the inboard housing. AXLE SHAFT: The axle shaft simply connects the inboard joint and the outboard joint. It is made out of special steel heat treated to give optimum strength and fatigue performance. The function of the axle shaft is to transmit torque and rotation to the wheel from the transmission.
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