Types of Kinematic Pairs || Kinematic pair in hindi || Classification of kinematic pairs || TOM

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A spherical joint or ball and socket joint requires that a point in the moving body remain stationary in the fixed body. This joint has three degrees of freedom, corresponding to rotations around orthogonal axes.
A planar joint requires that a plane in the moving body maintain contact with a plane in fixed body. This joint has three degrees of freedom. The moving plane can slide in two dimensions along the fixed plane, and it can rotate on an axis normal to the fixed plane.
Higher pairs
Generally, a higher pair is a constraint that requires a curve or surface in the moving body to maintain contact with a curve or surface in the fixed body. For example, the contact between a cam and its follower is a higher pair called a cam joint. Similarly, the contact between the involute curves that form the meshing teeth of two gears are cam joints, as is a wheel rolling on a surface. It has a point or line contact.

How many types of kinematics are there?
8 different types
The reactions are classified into 8 different types, depending on the data present in the library. These are called kinematics types, because the classification is related to the kinematics of the reactions
What is kinematic pair and its classification?
Kinematic pair is a joint of two Links (or elements) and it permit to relative motion. When the two links or element is having connected together that provide relative motion it is completed or successfully constrained is called kinematic pair.
What is link and pair?
 The two links or elements of a machine, when. in contact with each other, are said to form a. pair. If the relative motion between them is completely or successfully constrained (i.e. in a definite direction), the pair is known as kinematic pair. Let us discuss the various types of constrained motions

Types of Kinematic Pairs:
Kinematic Pairs can be broadly classified into many types based on three main criteria. The classification of kinematic pairs is listed and described below:

Based on the nature of contact between the pairing elements
Lower Pair
Higher Pair
Based on the type of mechanical constraint (or mechanical contact)
Self Closed Pair
Force Closed Pair
Based on the type of relative motion between the elements of the pair
Sliding Pair
Rolling Pair
Turning Pair
Screw Pair (or Helical Pair)
Cylindrical Pair
Spherical Pair


Read more: http://mechteacher.com/kinematic-pair...