Chapter. 4 Mechanism Design and Analysis

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Calculating Degrees of Freedom of a Linkage16 A movable link in a planar mechanism has 2 translational DOF and 1 rotationalDOF. A revolute joint constrains 2 translational DOF. A prismatic joint constrains 1translational DOF and 1 rotational DOF. For the casement window mechanism, the number of total degree of freedom is:6 revolute joints, 1 prismatic joint3×(6-1)-2×(6+1)=16 links, 1 ground link For the windshield wiper mechanism, the number of total degree of freedom is:7 revolute joints3×(6-1)-2×7=16 links, 1 ground link
Example 2. Analysis of Slider Crank Mechanism17 Many computer simulation software can be used for mechanism analysis. After the length of the links, the number, type, and connectivity of the joints aredecided, force analysis and stress analysis are needed to design the actual size andshape of the links. A reciprocating force (0N-5N) is exerted on the slider in –x direction. The periodis 0.898 sec.
Page 1 and 2: Chapter. 4 Mechanism Design and Ana
Page 3 and 4: Planar Mechanism3 The planar mechan
Page 6 and 7: Linkage Design (I)6 The function of
Page 8 and 9: Linkage Design (III)82 bars3 bars4
Page 10 and 11: Crank and Rocker Mechanism10 The sh
Page 12 and 13: Double Rocker Mechanism12 The short
Page 14 and 15: Other Linkages14 Slider crank (cran
Page 18: Example 2. Analysis of Slider Crank

Chapter. 4 Mechanism Design and Analysis

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