Abstract
Abstract. Hidden-keyhole padlocks use a plate or some other means to cover the keyhole
and are a category of traditional Chinese padlocks. The topological
structures of traditional hidden-keyhole padlocks have distinct arrangements
in the operation. Therefore, they are reconfigurable mechanisms. This paper
presents the structures of traditional Chinese hidden-keyhole padlocks, which
were popular and had abundant types. The structural characteristics of
hidden-keyhole padlocks are described first. Then, the representation for
kinematic pairs appeared in operating steps is introduced. The variable
chains of hidden-keyhole padlocks are presented by using the representation
of kinematic pairs, from which all topology variabilities of hidden-keyhole
padlocks in the operation are derived. Four main types of hidden-keyhole
padlocks are provided as examples to illustrate the configuration
transformations. This work presents a useful procedure to indicate and
analyze the topology variabilities of hidden-keyhole padlocks.
Subject
Industrial and Manufacturing Engineering,Fluid Flow and Transfer Processes,Mechanical Engineering,Mechanics of Materials,Civil and Structural Engineering,Control and Systems Engineering
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