Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
10th Edition
ISBN: 9780073398204
Author: Richard G Budynas, Keith J Nisbett
Publisher: McGraw-Hill Education
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Chapter 17, Problem 21P

The geometric implications of a V-flat drive are interesting.

  1. (a) If the earth’s equator was an inextensible string, snug to the spherical earth, and you spliced 6 ft of string into the equatorial cord and arranged it to be concentric to the equator, how far off the ground is the string?
  2. (b) Using the solution to part a, formulate the modifications to the expressions for mG, θd and θD, Lp, and C for a V-flat drive.
  3. (c) As a result of this exercise, how would you revise your solution to part b of Prob. 17–20?
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In the four-rod mechanism. You have a closed polygon, where: a = length of input crank = 1 inch b = length of connecting rod = 2 inches c = length of output crank = 2 inches d = length of fixed rod = 2 inches. By varying the angle θ, the perimeter of the polygon is preserved, but not its area. Determine the angle θ where its maximum area is reached and the minimum area of the polygon.
Slide B travels along the center line XX'. Q2A = 18 cm, AB = 72 cm. 1. With the crank in the position shown, draw the four bar linkage. Name each link and show the finite and infinite cranks.2. Find the two extreme positions of block B. Express your answer in terms of the acute angle formed by crank Q2A with the horizontal axis (like the angle 45° in the figure)3. Determine the length of the stroke of B. Write your answer  in two decimal places.
The cutting force F in the quick return mechanism shown has a magnitude of 40 N. Neglecting friction, gravity, and inertia, find the driving torque required on link 2 and the bearing forces at 0, and 0, graphically at this configuration. Select proper scales from the figure (rozB = 4 cm). OD6 5 4 2 B2 on 2 Вз on 3 1 3
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