Question

#1. Design a crank rocker mechanism (four bar linkage) where the rocker length is between 3 inch and 3.5 inch with a swing angle of about 45 degree. Also the time ratio (Q) of the linkage is required to be between 1.5 and 1.75 (20 pts). Clearly show the lengths of the crank, coupler and fixed frame of your design (10 pts). Locate a coupler point about o.S inch above the mid-point of your coupler (5 pts). Draw the linkage and locate the coupler point when crank is making 90 degree angle with the fixed frame (10 pts). Approximately draw the coupler curve by visualizing (or redrawing the (20 +10 +5 +1 inkage at different positions) the motion of the coupler (5 pts). 50pts) 450

Answer 1