Actions

Whitworth Quick Return Mechanism

From DT Online

WhitworthQuickReturnMechanism.gif


Description

The Whitworth Quick Return Mechanism changes rotary to Oscillating Motion but, unlike the Crank and Slider, the forward reciprocating motion is at a different rate to the backward stroke.


It is also a type of Coulisse Mechanism in reference to the slotted crank (i.e. as in Portcullis from the French ‘porte coulissante’, or 'sliding door', and derived from the Old French ‘Coulisse’ referring to a timber member grooved to take a sliding panel)


Features and Applications

At the bottom of the slotted arm, the peg only has to move through a few degrees to sweep the arm from left to right, but it takes the remainder of the revolution, and consequently more time, to bring the arm back. This mechanism is most commonly seen as the drive for a Shaping Machine.


Animations
Coulisse Mechanism
Combined Coulisse Mechanisms - combination of two Coulisse Mechanisms. The green rocker has working stroke slower than return one..
Shaper with Coulisse Mechanism - reciprocating motion having working stroke slower than return one.
DT Online Buyers' Guide
Engino Stem Mechanics Pulley Drives Model Kit Engino K'Nex Education Intro to Simple Machines Levers and Pulleys Set Fischertechnik 536622 - Mechanic & Static 2 Fischertechnik Universal 3 Building Kit Meccano 25 Model Set Meccano Multi Models 50 Model Set Simple And Motorized Mechanisms Base Set Engino Education Design And Technology Master Construction Set, Covering Simple Machines, Structures, Bridges, Rewable Energy, Forces And Energy Motion
Engino Pulley Drives Kit Engino "STEM Mechanics" Levers and Linkages Set K'Nex Simple Machines Levers & Pulleys Fischertechnik Mechanic & Static 2 Fischertechnik Universal 3 Building Kit Meccano 25 Model Set Meccano Multi Models Lego Motorized Mechanisms Engino Education D&T Master Construction Set