Wheel Drive Shafts Description and Operation
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Wheel Drive Shafts Description and Operation
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Wheel drive shafts are flexible assemblies consisting of an inner joint and an outer constant velocity joint connected by an axle shaft. The inner joint is completely flexible, and can plunge in and out. The outer joint is also flexible, but cannot move in and out. These drive shafts are used to transmit rotational force from the transaxle to the front tire and wheel assemblies.
The wheel drive shafts use inboard and outboard joint seals made of thermoplastic material, and clamps made of stainless steel. The functions of the seals are as follows:
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The seals protect the internal parts of the inboard and outboard joints.
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They protect the joint lubricating grease from surrounding detrimental atmospheric conditions; such as extreme temperatures, ozone gas, etc.
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They protect the joint lubricating grease from foreign materials; such as stones, dirt, water, salt, etc.
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The seals facilitate angular movement of the outboard joint.
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The seals facilitate angular and axial movement of the inboard joint.
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The function of the clamps is as follows:
Provide a leak proof connection at both the housing and the axle shaft for the inboard and outboard joints.
The thermoplastic material performs well against normal handing, operational wear and conditions. However, this material is not strong enough to withstand abusive handling or damage due to objects such as sharp tools or the sharp edge of any other surrounding components on the vehicle.
The inner joints are of the tripot or CV-joint design without an over-extension limitation retainer. The inner joints incorporate a male spline which interlocks with the transaxle using snap rings.
The outer joints are of the Rzeppa. The shaft end which mates with the wheel bearing and hub has helical splines to assure a tight, press-type fit. This design assures that no end play will exist between the hub bearing and the drive shaft assembly for added durability and reduced bearing noise.
