- Kinematic pair
A kinematic pair is the general name for two rigid bodies that can move with respect to each other via a mechanical constraint ("joint") between the two bodies. In
kinematics, one classifies the kinematic pairs in two groups:
* Lower pairs: the constraints is of the "surface" type. The following joint types exist:
revolute joint("pin", " hinge"), prismatic joint("slider"), cylindrical joint, screw joint, planar joint, and spherical joint(" ball and socket").
* Higher pairs: the constraint is of the curve or point type. For example:
cams or gears.Kinematic pairs are the building blocks of most kinematic chains and mechanical linkages, e.g., gimbals, robots, car suspensions.
* Degrees of freedom
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