Types of Kinematic Links

1.Rigid links

  • Binary link
  • Ternary link
  • Quaternary link
2.Flexible link
3.Fluid link

Kinematic Link: 
It is the smallest unit of machine. Kinematic links form the backbone of any mechanical system. A kinematic link should be resistant body (need not to be rigid always but it must be able to transfer relative motion).

1. Rigid Links
In this type of link there is no deformation(negligible deformation) while transmitting the motion.There is no change in shape and size of link. Link is not elongate while transmitting motion.Example of rigid link is connecting rod use in internal combustion engine.

Note: In reality, no rigid links exist. However, kinematic links whose deformation is very small are considered as rigid links.

rigid links type

2.Flexible link
A flexible link is one which while transmitting motion is partly deformed in a manner not to affect the transmission of motion.
Example:Spring, Chain, Rope, belt, etc.

3.Fluid link
A fluid link is one which is deformed by having fluid in a closed vessel and the motion is transmitted through the fluid by pressure.
Example:Hydraulic press and Hydraulic 
jacks etc...