Quantcast Rzeppa Constant Velocity (CV) Joint

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hard  steering,  slippage,  and  tire  wear  each  time  the vehicle  turns  a  corner.  Constant  velocity  joints eliminate the pulsations because they are designed to be used exclusively to connect the front axle shaft to the driving wheels. Basic operation of a CV joint is as follows: The  outboard  CV  joint  is  a  fixed  joint  that transfers  rotating  power  from  the  axle  shaft  to the hub assembly. The  inboard  CV  joint  is  a  sliding  joint  that functions as a slip joint in a drive shaft for rear- wheel drive vehicles. The  constant  velocity  joints  you  will  normally encounter  are  the  Rzeppa,  Bendix-Weiss,  and  tripod types. Rzeppa Constant Velocity (CV) Joint The Rzeppa constant velocity (CV) joint is a ball- bearing type in which the balls furnish the only points Figure  5-7.—Double-cardan  universal  joint. of  driving  contact  between  the  two  halves  of  the coupling. A Rzeppa CV joint consists of a star-shaped inner  race,  several  ball  bearings,  bearing  cage,  outer race or housing, and a rubber boot (fig. 5-8). The inner race (driving member) is splined to the inner axle shaft. The outer race (driven member) is a spherical housing that is an integral part of the outer shaft; the balls and ball cage are fitted between the two races.  The  close  spherical  fit  between  the  three  main members  supports  the  inner  shaft  whenever  it  is required to slide in the inner race, relieving the balls of any duty other than the transmission of power. The movement of the balls is controlled by the ball cage. The ball cage positions the balls in a plane at right angles to the two shafts when the shafts are in the same line. A pilot pin, located in the outer shaft, moves the pilot  and  the  ball  cage  by  simple  leverage  in  such  a manner  that  the  angular  movement  of  the  cage  and balls is one half of the angular movement of the driven shaft. For example, when the driven shaft is moved 20 5-5

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