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Abstract: Traditional pantograph mechanism consists of a
parallelogram with two extended sides. It can scale the distance from
the pole to a given point. However it can not scale the distance between
any given points. This goal is achieved by using inter-connected multi
parallelograms with a link chosen as a driver. The result is a class of
linkages that can enlarge or shrink a planar graph by driving a revolute
pair. These mechanisms can be
single degree-of-freedom or over-constrained.
Key
words: Parallelogram
mechanisms Planar pantograph Overconstrained linkages
CLC No: TH112
国家973项目(2004CB31800)、国家自然科学基金(50475161)和北京市自然科学基金(3053017)资助项目.
Received 20050107, received in revised form 20050427
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