Government Engineering College,Valsad :- VANIYA NILESH B :- TANDEL JAY H :-PARMAR TUSHAR G.

2 Can crusher Simple press Rear-window wiper

.3 Moves packages from an assembly bench to a conveyor Lift platform Microwave carrier to assist people on wheelchair

4 Lift platform Front loader Device to close the top flap of boxes

Ken Youssefi5 Stair climbing mechanism A box that turns itself off Airplane landing gear mechanism

6 Conceptual design for an exercise machine Rowing type exercise machine

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8 Six-bar linkage prosthetic knee mechanism Extension position Flexed position

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Ken YoussefiMechanical Engineering Dept.10 Case I shortest link + longest link < summation of the other two links a)Shortest link is the driver with either one of the intermediate links as the ground link (fixed). The result is two different types of crank-rocker mechanisms, input link rotates 360 (crank) and output link oscillates (rocker) s + l < p + q

11 Case I shortest link + longest link < summation of the other two links b)Shortest link is fixed. The result is a double-crank mechanism. Both, input and output links rotate 360.

12 c)The longest link is fixed and either one of the intermediate links is the driver. The result is a double-rocker mechanism. Both, input and output links oscillate. Grashof condition – one link rotates 360 Case I shortest link + longest link < summation of the other two links

Ken YoussefiMechanical Engineering Dept.13 Case II shortest link + longest link > summation of the other two links There are four possible mechanisms depending on which link is fixed. All mechanisms are double-rockers. Case III shortest link + longest link = summation of the other two links Same mechanisms as in case I with the addition of a branching point (all links become collinear).

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15 S + l > p + q 4 double rocker mechanisms

16 Input link, crank Coupler link, connecting rod Output link, piston (slider)

17 Offset slider-crank mechanism

18 In-line slider crank mechanism The mechanism has a stroke B 1 B 2 equal twice the crank length r 2. Locations B 1 and B 2 are called the extreme positions (limiting) of the slider

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21 Function Generation Mechanisms A function generator is a linkage in which the relative motion between links connected to the ground is of interest. A four-bar hand actuated wheelchair brake mechanism

22 Function Generation Mechanisms A four-bar drive linkage for a lawn sprinkler

23 Function Generation Mechanisms A four-bar function generation mechanism to operate an artificial hand used for gripping. A four-bar function generation mechanism to lower an attic stairway.

24 Motion Generation Mechanisms In motion generation, the entire motion of the coupler link is of interest (rigid body guidance). New Rollerblade brake system

25 Motion Generation Mechanisms Four-bar automobile hood linkage design

26 Path Generation Mechanisms In path generation, we are concerned only with the path of a tracer point and not with the motion (rotation) of the coupler link. Crane – straight line motion

27 Path Generation Mechanisms A four-bar path generation mechanism as part of an arm-actuated propulsion system for a wheelchair A four-bar path generation mechanism to guide a thread in an automatic sewing machine

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30 Rotating a monitor into a storage position Moving a storage bin from an accessible position to a stored position

31 Lifting a boat out of water Moving a trash pan from the floor up over a trash bin and into a dump position

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