2How Mechanisms are made? Mechanism consist of following element Mechanisms are used to obtain required motion in machines.It is capable of transforming one type of input motion in to another.How Mechanisms are made?Mechanism consist of following elementLink or ElementKinematic PairKinematic Chain
3What is a Link or Element? A resistant body, which is a part of machine and has a motion relative to other connected part is known as an Element or Link.CylinderPistonCrankConnecting Rod
4What is resistant body ?The body, which is capable of transmitting the forces with negligible deformation is called as resistant body.
5Examples of Link or Element: Link1- Piston LInk2- Cylinder Link 3- CrankLink 4 Connecting RodCylinderPistonCrankConnecting Rod
6What is a kinematics Pair? When two element or link which are connected together in such way that the motion between them is constrained (in a definite direction) is known as kinematic Pair.Kinematic Pair21.Kinematic Pair –ICrank & Frame2.Kinematic Pair –IICrank & Connecting Rod3.Kinematic Pair- IIIConnecting Rod & Piston4.Kinematic Pair – IVPiston & Cylinder4231
7Kinematic chainwhen the kinematic pair are connected in such manner that the last link is joined to the first link to transmit completely or successfully constrained motion, then it is called as kinematic chain
9Mechanisms Example for Mechanism If one of the links or element of a kinematic chain is fixed,the arrangement can be used for transmitting ortransforming the motion, and it is called as Mechanism.In short Mechanism is a kinematic chain with one linkfixed.Example for Mechanism
10Types of kinematic chain or Mechanism Four bar chain or quadric cycle chain.Single slider crank chainDouble slider crank chain
12Four Bar Chain Mechanism It is simplest kinematics chain, consists of 4 links & forming 4 turning pair; A0, A, B, B0. Each link have different length.If 1 link in 4 bar chain is fixed, then it is called as bar chain Mechanism & other 3 links moves relative to each other.
13Four Bar Chain Mechanism It is simplest kinematics chain, consists of 4 links & forming 4 turning pair; A0, A, B, B0. Each link have different length.If 1st link in 4 bar chain is fixed, then it is called as 4 bar chain Mechanism & other 3 links moves relative to each other.
14Slider Crank ChainA single crank chain is a modification of the basic four-bar chain. It consists of one sliding pair and three turning pairs.It is found in reciprocating steam engine mechanism.This type of mechanism converts rotary motion into reciprocating motion and vice versa.Links: Frame and cylinder, crank, connecting rod, crosshead or piston.
15First Inversion of a single slider crank chain Reciprocating engine and Air compressorLinks – 1- fixed2- crank3- connecting rod4- slider