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Kinematics Analysis in Machine Mechanisms: Inversions of 4-Bar and Slide Crank Chains

Explore the kinematic chains, such as four-bar chain and slide crank chain, in machine mechanisms. Learn about Grashof’s law, different mechanisms like beam engine and Watt’s indicator, and various types of chains like single slider crank and double slider crank.

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Kinematics Analysis in Machine Mechanisms: Inversions of 4-Bar and Slide Crank Chains

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Presentation Transcript

  1. THEORY OF MACHINE CHAPTER 1

  2. Kinematics inversions of 4 bar and slide crank chain &Kinematics analysis in simple mechanisms

  3. The most important kinematic chains are those which consist of four lower pairs, each pair being a sliding pair or a turning pair 1. Four bar chain or quadric cyclic chain, 2. Single slider crank chain, and 3. Double slider crank chain.

  4. Four Bar Chain or Quadric Cycle Chain • According to Grashof ’s law for a four bar mechanism, the sum of the shortest and longest link lengths should not be greater than the sum of the remaining two link lengths if there is to be continuous relative motion between the two links.

  5. Inversions of Four Bar Chain • Beam engine (crank and lever mechanism) 2. Coupling rod of a locomotive (Double crank mechanism) 3. Watt’s indicator mechanism (Double lever mechanism) Beam engine (crank and lever mechanism)

  6. Coupling rod of a locomotive (Double crank mechanism)

  7. Watt’s indicator mechanism (Double lever mechanism)

  8. Single Slider Crank Chain

  9. Inversions of Single Slider Crank Chain • Pendulum pump or Bull engine 2. Oscillating cylinder engine 3. Rotary internal combustion engine or Gnome engine • Crank and slotted lever quick return motion mechanism. 5. Whitworth quick return motion mechanism.

  10. Pendulum pump or Bull engine

  11. Oscillating cylinder engine

  12. Rotary internal combustion engine or Gnome engine

  13. Crank and slotted lever quick return motion mechanism

  14. Whitworth quick return motion mechanism

  15. Double Slider Crank Chain • Elliptical trammels • Scotch yoke mechanism • Oldham’s coupling

  16. Elliptical trammels

  17. Scotch yoke mechanism

  18. Oldham’s coupling

  19. THANK YOU

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