Notes..............mmm, Schemes and Mind Maps of Mechanical Engineering

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Kinematic Chain: A kinematic chain is an assembly of links in which the relative motions of the links is possible and the motion of each relative to the other is definite. In case the motion of a link results in indefinite motions of other links, it is a non-kinematic chain. A redundant chain does not allow any motion of a link relative to the other. a. kinematic chain b. non kinematic chain ¢. redundant chain * The number of pairs (p) forming a kinematic chain and the number of links (/) may be expressed as: /=2p-4........ eqn. (i) + Another relation between the number of links (/) and number of joints () which constitute akinematic chain is expressed as :f=3/21-2....... eqn. (ii) * Ifthe above eqn. (i) and (ii) for any example - * LHS>RHS__ then it will be considered as “Locked Chain” * LHS=RHS _ thenit will be considered as “One degree of freedom” * LHS