According to nature of mechanical constraint kinematic pairs can be classified as:
* Closed pair
* Unclosed pair
Closed Pair
- When the elements of the pair are held together mechanically
- Elements are geometrically identical
- Contact can be broken only by destruction of atleast one member
Example:
Screw pair
Unclosed Pair
- When elements are connected either by force of gravity or by spring action
- Links are not held together mechanically
Example:
Cam and follower pair
* Closed pair
* Unclosed pair
Closed Pair- When the elements of the pair are held together mechanically
- Elements are geometrically identical
- Contact can be broken only by destruction of atleast one member
Example:
Screw pair
Unclosed Pair
- When elements are connected either by force of gravity or by spring action
- Links are not held together mechanically
Example:
Cam and follower pair
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