Whitworth Quick Return Mechanism is an Inversion of

By Mohit Uniyal|Updated : July 22nd, 2022

Whitworth quick return mechanism is an inversion of

  1. Four bar chain
  2. Single slider crank chain
  3. Double slider crank chain
  4. Crossed slider crank chain 

Answer: B- Single slider crank chain

Whitworth quick return mechanism is an inversion of a single slider crank chain.

Solution:

Single slider crank mechanism:

  • A slider-crank is a four-link kinematic chain.
  • It contains three turning pairs and one sliding pair.
  • The second link, which is referred to as a crank, rotates.
  • The third link, often called the connecting rod, combines reciprocating and rotary motion.
  • Link 4 is a slider and has reciprocating action.
  • A frame is Link 1. (fixed).
  • This device converts rotary motion to reciprocating motion and vice versa.

A slider-crank is a four-link kinematic chain having one sliding pair and three turning pairs.

The crank (Link 2)  has rotary motion only. The connecting rod (Link 3) has a combined rotary and reciprocating motion. The slider (Link 4) has reciprocating motion only. Slider crank  mechanism converts rotary motion to reciprocating and vice versa.

Inversions:

  • First inversion: Inversion is obtained by fixing link 1(Ground body).
    Application: Reciprocating compressors and engines.
  • Second inversion: Inversion is obtained by fixing link 2 (crank).
    Application: Rotary engine, Whitworth quick return mechanism.
  • Third inversion: Inversion is obtained by fixing link 3 (Connecting rod).
    Application: Slotted crank mechanism, Oscillatory engine.
  • Fourth inversion:  Inversion obtained by fixing link 4 (Slider).
    Application: Pendulum pump or Bull engine, A hand pump.

Whitworths quick return mechanism is an inversion of a single slider crank chain in which link 2 (crank) is fixed.

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