Kinematics and Dynamics of Machines | Mechanisms by Pavan | Learn Smarter
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Mechanisms

Mechanisms consist of rigid bodies connected by joints to create desired motions or force transmissions, playing a crucial role in machines. Various types of joints and mechanisms serve different functions, such as motion generation and force transmission. Special-purpose mechanisms like the quick return mechanism and universal joint demonstrate their applications in machinery and automotive systems.

Sections

  • 1

    Introduction To Mechanisms

    This section introduces mechanisms as systems of interconnected links and joints that facilitate motion and force transmission in machines.

    Learning Practice

  • 2

    Types Of Joints (Kinematic Pairs)

    This section introduces the various types of joints used in mechanisms, categorized into lower pairs and higher pairs, each facilitating different types of movement.

    Learning Practice

  • 2.1

    Lower Pairs: Surface Contact

    This section covers lower pairs in kinematic pairs, focusing on surface contact mechanisms including revolute, prismatic, cylindrical, spherical, and screw joints.

    Learning Practice

  • 2.2

    Higher Pairs: Line Or Point Contact

    This section discusses higher pairs in mechanisms which involve line or point contact between links.

    Learning Practice

  • 3

    Classification Of Mechanisms

    This section covers the classification of mechanisms based on their functions and constraints.

    Learning Practice

  • 3.1

    Based On Function

    This section explores the classification of mechanisms based on their functions, including motion generation, force transmission, and path generation.

    Learning Practice

  • 3.2

    Based On Constraints

    This section explores the classification of mechanisms based on their constraints and functional attributes.

    Learning Practice

  • 4

    Common Planar Mechanisms

    This section discusses common planar mechanisms, emphasizing the four-bar and slider-crank mechanisms and their practical applications and inversions.

    Learning Practice

  • 4.1

    Four-Bar Mechanism

    The Four-Bar Mechanism is a fundamental closed-chain mechanical system used to convert rotary motion into oscillatory or reciprocating motion.

    Learning Practice

  • 4.2

    Slider-Crank Mechanism

    The slider-crank mechanism is a pivotal mechanism used to convert rotary motion into reciprocating motion and is widely found in various mechanical applications.

    Learning Practice

  • 5

    Special Purpose Mechanisms

    This section explores various special purpose mechanisms that serve distinct functions in machines.

    Learning Practice

  • 5.1

    Quick Return Mechanism

    The Quick Return Mechanism is a specific type of mechanism used in shaping and slotting machines to convert rotary motion into reciprocating motion, characterized by a quicker return motion than the cutting stroke.

    Learning Practice

  • 5.2

    Straight Line Generators

    Straight line generators are special mechanisms designed to produce straight-line motion, often critical in various engineering applications.

    Learning Practice

  • 5.3

    Rocker Mechanism

    The rocker mechanism is a type of mechanical system that converts rotary motion into oscillatory motion, commonly utilized in applications such as valve gear and suspension systems.

    Learning Practice

  • 5.4

    Universal Joint

    The Universal Joint provides a means of transmitting torque between shafts that are not in line with each other, allowing for connection at varying angles.

    Learning Practice

  • 5.5

    Steering Mechanisms

    Steering mechanisms control the direction of vehicles, with specific designs ensuring that the correct turning radius is maintained for all wheels.

    Learning Practice

References

Module I_ Mechanisms.pdf

Class Notes

Memorization

What we have learnt

  • A mechanism is a collection...
  • Mechanisms can be classifie...
  • Common mechanisms include f...

Final Test

Revision Tests