University of California, Los Angeles

MECH&AE 162A

1) For all parts of this question, consider the collection of links and pairs shown in Fig. 1. Figure 1: Collection of links and pairs that pertain to question 1. A) Is the drawing shown in Fig. 1 a mechanism and why? (2 points) B) Is the drawing shown in Fig. 1 a linkage and why? (2 points) C) What is the technical name of Pair A and what kind of pair is it (i.e. lower or higher pair)? (2 points) Link A Link B Link C Pair A Pair B (Joint that connects the box and the line) D) What is the technical name of Pair B and what kind of pair is it (i.e. lower or higher pair)? (2 points) E) What kind of link is Link A in Fig. 1 (binary, ternary, or quarternary)? (1 point) F) What kind of link is Link B in Fig. 1 (binary, ternary, or quarternary)? (1 point) G) What kind of link is Link C in Fig. 1 (binary, ternary, or quarternary)? (1 point) H) Use Kutzbach’s Criterion to determine the mobility of the drawing shown in Fig. 1. (8 points) n= j1= j2= m= 2) For all parts of this question, consider the mechanism shown in Fig. 2. Figure 2: The input link (link 2) pushes on the output link (link 3) with an internal contact interaction of two circular profiles causing link 3 to rotate about the origin shown. R H 3 2 1 1 L X Y R1A R1B B Rolling and Sliding Contac