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Constant velocity joint

Friday, 7 Sep 2012

Being an FWD vehicle, the Subaru 1000 has drive shafts at the front and both ends of these are connected by constant velocity joints. 

The constant velocity joint comprises a CVJ (Constant Velocity Joint) on the wheel side and a telescopic DOJ (Double Offset Joint) on the differential side. This use of two constant velocity joints basically resolves the issue of unpleasant vibrations that occur during turning and acceleration when using a cross-shaped joint. 

Features of the two constant velocity joints are as follows: 

  • ・The constant velocity joint does not have the bend moment act on the shaft as in the case of a cross-shaped joint; it is compact; moreover, because it has no imbalance, it has little vibration and can run quietly. 
  • ・Because the ball conducts smooth rolling movement, it entails hardly any loss. 
  • ・Because the joint is sealed, there is no need for greasing. 

(Note) The Subaru 1000 was the world’s first mass produced car to adopt drive shafts based on combination of this DOJ and CVJ.

(Source: Extracted from the Subaru 1000 Sales Sheet 1966-1)