Parallel Motion Linkage

Description

The Parallel Motion Linkage is a special case of Four Bar Chain in which the equal in lengths of opposite sides of the parallelogram ensure that input and output motions remain parallel.

Features and Uses

There are several good examples of these in action. The Pantograph is a parallel motion linkage used by electric trains to pick up power from overhead cables. Another use is the Pantograph used in drawing to copy sketches. Other uses are in containers such as tool boxes and sewing boxes which open up to reveal multiple shelves and containers which need to be held horizontal.

James Watt used a Parallel Motion Linkage to ensure the movements of both the piston and the pump rod in his Beam Engines remained parallel.

DT Online Buyers' Guide

Simple Frames and Linkages can be explored using Construction Kits such as those listed below.

More varied models can be constructed using the materials listed at Truss Bridge Models or Stripwood Technology Materials and tools described in Stripwood Technology Tools.

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Viga Wooden Construction Set	Straws and Connectors	Construction Engineering Blocks	K'Nex Education Group Set	Engino STEM Construction Set	Lego Duplo Tech Machines Set	Lego Education Core Set	Meccano Easy Construction Box	Fischertechnik Universal Building Kit