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Abstract: From the theory that four-connecting rods mechanism has
flexibility and any closed graphics of plane mechanism has three
restrictions, the calculating formula of degree of freedom of mechanism
is researched. The results of research indicate that the calculating
formula of degree of freedom of space mechanism will be set up if the
calculating formulas of degree of freedom of plane and spherical surface
mechanism are changed a little. The new formula could substitute for 29
traditional calculating formulas of degree of freedom of space
mechanism. The new formula is suitable for not only space mechanism but
also the plane mechanism, the multiple rings space mechanism, the open
chain space mechanism and mixed chain space mechanism and so on. Because
that the new formula is easier and rapider in use than traditional
formulas, it is a reliable theoretical calculating formula for
calculating degree of freedom of space mechanism.
Key words: Space mechanism Degree of freedom Number of restrictions
Number of closed rings
CLC No: TH112
Received
20010813, received in revised form 20020410
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