Question

Problem 1. For the four-bar linkage mechanism shown in the figure, determine all angles, the maximum and minimum transmission angles, the sweep angle, and the angular velocities of elements AB and O.B, if element O, A rotates at 3 rad/s CCW. 10" 03 26- a FA /2 e 04 10" 8 8 24"

For the four bar linkage mechanism shown in the figure, determine all angles,the maximum and minimum transmission angles,the sweep angle, and the angular velocities of elements AB and O4B, if element O2A rotates at 3 rad/a CCW

Answer 1

WAB = 30 4018 = 0.73 zady s VA O, A = 10 mch, AB = 26"048 = 18", Angles W2 = 3oad's (), 0204 = 30" tan O2 = Therefore; V2 = M₂ W2 {:02 = 53.12 V2 = 60%)(3) - 30 inch/= VA : Consider Instanteneous center of rotation approach Also; 12 = (WAB)( 124A) * Therefore; Vo = (124 B) WAB = 0.73% 22.8 = 16064 indys Also; VB = {{4}(WA) * :W4= = 0.92 rad's (5) From the Ick diagram below drawn to scale: 02 - 53.12° 8= 67° = transmission angle, 03 - 230 A = 19* 40.8897 2 = 90°- A = 71° Ø 109° 04 = 90° Consider scale : I inch 16.64 18 X = = 0.25cm

124 considering scale Scale: 1inch = 0.25 cm I 24 A = 10.2cm = 40.8inch Iz4 B = 5.7cm = 22.8 inch B 134 8 3 093 123 A A 2 04 I 3 - Iz 04