Abstract: A new criterion of
degree of freedom for planar mechanism was presented. Compared
with Gruebler's equation, this criterion possesses some
characteristics. On one hand, this equation needs no modifying
to the complex hinges, degrees of local freedom, and the case of
mechanism with all sliding pairs. On the other hand, synthesing
the concepts of substitution higher pair for kinematically
equivalent lower pair, DOF determination and evolution, which
benefits the students in learning. Hence, the authors suggest
the formula be recommended, since its briefness, easiness to
grasp.
Key words:
Plane mechanism Degree of freedom Degree of constraint
Manuscript received on
September 8, 1993
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