Draw neat diagram of ‘scotch yoke mechanism’? Explain its
constructional features in brief.
Constructional Features of Scotch Yoke Mechanism:
 In this mechanism, two sliding pairs and two turning pairs are used. So it is an
inversion of Double Slider Crank Chain Mechanism.
 It consists of following types of links with relative motion as mentioned below;
Link 1 (B) – Fixed Link – Guide the Frame
Link 2 – Crank – Turning Motion – Rotates about Point B in Link 1
Link 3 - Slider -Sliding Motion
Link 4 – Fixed Link – Frame – Reciprocating Motion
 The inversion is obtained by fixing either the Link 1 or Link
 When the link 2 (which corresponds to crank) rotates about B as centre, the link 4
(which corresponds to a frame) reciprocates. It is used for converting rotary motion
into a reciprocating motion.