Tue 6-21 PM Q Course Cont The Figure on the right shows a drum brake mechanism,

Question

Tue 6-21 PM Q Course Cont The Figure on the right shows a drum brake mechanism, with dimensions in mm. Questions 8 and 9 are about one half of the mechanism. 02, 04, and 06 are fixed pivots (on the ground link). 06 7. 8. 9. Use Kutzbach's equation to determine mobility. Is this mobility appropriate for a brake mechanism? Why? Determine the Grashof classification of the 4-bar linkage 02-C L3-100 L1-87 12 49 121° 4 D-06. Be careful to determine link lengths (distances between 4 153 L5-100 02 these four joints) correctly from the dimensions shown. The Figure is to scale, in case you have doubts about the dimensions. Determine if the 4-bar linkage O2-CD-06 is a crank-rocker, a double-crank, a double-rocker, or a triple rocker. Explain how. 04 10,

Explanation / Answer

No of binary links, L = 6

No of binary joints,J =7

No. of higher pairs = 0

Kutzbach Equation; DOF = 3(L-1)-2J- H

=3(6-1) -2x7

=1

So DOF of the given mechanism is 1. So only one input is required to control the mechanism which is apt for a braking mechanism.

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