Types of Universal Joints

What is Universal Joint ?:
 

• Universal Joint is a  connection between two rotating shafts, whose axes are inclined to 

   each other

 

 Why Universal Joint:

 •This joint permits the transmission of power form Gear box to Differential at some inclination

 

Types of Universal Joints:

  • Cross type or Spider and two yoke type or Hooke’s Joint 

 • Ball and Trunnion type 

 • Constant Velocity type

 

 Hooke’s Joint  Constructional Details:

• The axes of shafts A and B are intersecting 

• Each of these shafts contain a Yoke 

• Cross or Spider has four arms, called trunions

• The two opposite arms of the cross are supported in bushes or bearings in the yoke of 

  shaftA 

• The two other arms of the cross are supported in the yoke of shaft B

 

 Hooke’s Joint  Operation:

 • Shaft A can have angular rotation about axis XX and the shaft B, about the axis YY

 • When shaft A rotates, the yoke attached to it also rotates

 • The trunnions of the spider attached to this yoke rotate

 • The spider thus rotates 

 • The spider causes the shaft B to rotate 

 • Hooke’s joint is capable of transmitting power  upto 20° angle without causing vibration or 

   strain

 

 Details of Hooke’s Joint:

 • Two Y shaped yokes 

 • One Cross or Spider 

 • Needle bearings 

 • Circlips