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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Textbook Question
Chapter 13, Problem 38P
For the countershaft in Prob. 3-72, p. 152, assume the gear ratio from gear B to its mating gear is 2 to 1.
- (a) Determine the minimum number of teeth that can be used on gear B without an interference problem in the teeth.
- (b) Using the number of teeth from part (a), what diametral pitch is required to also achieve the given 8-in pitch diameter?
- (c) Suppose the 20° pressure angle gears are exchanged for gears with 25° pressure angle, while maintaining the same pitch diameters and diametral pitch. Determine the new forces FA and FB if the same power is to be transmitted.
Problem 3-72*
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(b)
Solve the base pitch, centre distance, whole depth and contact ratio of a gear with
the given parameters: Pa= 6, 20 degree pressure angle, 19-tooth pinion is meshed
with a 77-tooth gear.
1. honano aean
--. . -a..k hooi sohuch
(c)
Solve the contact ratio of a gear when the base pitch, P, is the same length of action,
Z in Question Q2(b).
[Selesaikan nisbah sentuh gear apabila jarak benang asas, Ps adalah sama Panjang Tindakan, Z
dalam Soalan Q2(b).]
If this gear (Q2(b)) is a one of the component needed for designing a compound
gear train with ratio at 150:1, design the gear.
[Jika gear ini adalah salah satu komponen yang akan digunakan untuk merekabentuk 'train'
kompaun gear pada nisbah 150:1, rekabentuk gear ini.
(d)
A shaft carrying gear “A" rotates at 1750 rpm clockwise. What is the rotational speed and
rotational direction of the output gear "E"? (Refer to the figure below).
Input
Shaft 1
NA = 20
Only pitch
circles of
gears shown
BNg= 70
(A)
(B)
(C)
(D)
(E)
Nc = 18
166.7 rpm, CW
Shaft 2
166.7 rpm, CCW
203.7 rpm, CW
DND 22
203.7 rpm, CCW
Shaft 3
E
409.1 rpm, CCW
Note: Gear D is
Ng= 54
E
an idier
Shaft 4
Output
ASAP
Chapter 13 Solutions
Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)
Ch. 13 - A 17-tooth spur pinion has a diametral pitch of 8...Ch. 13 - A 15-tooth spur pinion has a module of 3 mm and...Ch. 13 - A spur gearset has a module of 6 mm and a velocity...Ch. 13 - A 21-tooth spur pinion mates with a 28-tooth gear....Ch. 13 - A 20 straight-tooth bevel pinion having 14 teeth...Ch. 13 - A parallel helical gearset uses a 20-tooth pinion...Ch. 13 - A parallel helical gearset consists of a 19-tooth...Ch. 13 - To avoid the problem of interference in a pair of...Ch. 13 - Prob. 9PCh. 13 - Prob. 10P
Ch. 13 - Prob. 11PCh. 13 - Prob. 12PCh. 13 - Prob. 13PCh. 13 - Prob. 14PCh. 13 - A parallel-shaft gearset consists of an 18-tooth...Ch. 13 - The double-reduction helical gearset shown in the...Ch. 13 - Shaft a in the figure rotates at 600 rev/min in...Ch. 13 - The mechanism train shown consists of an...Ch. 13 - The figure shows a gear train consisting of a pair...Ch. 13 - A compound reverted gear trains are to be designed...Ch. 13 - Prob. 21PCh. 13 - Prob. 22PCh. 13 - Prob. 23PCh. 13 - A gearbox is to be designed with a compound...Ch. 13 - The tooth numbers for the automotive differential...Ch. 13 - Prob. 26PCh. 13 - In the reverted planetary train illustrated, find...Ch. 13 - Prob. 28PCh. 13 - Tooth numbers for the gear train shown in the...Ch. 13 - The tooth numbers for the gear train illustrated...Ch. 13 - Shaft a in the figure has a power input of 75 kW...Ch. 13 - The 24T 6-pitch 20 pinion 2 shown in the figure...Ch. 13 - The gears shown in the figure have a module of 12...Ch. 13 - The figure shows a pair of shaft-mounted spur...Ch. 13 - Prob. 35PCh. 13 - Prob. 36PCh. 13 - A speed-reducer gearbox containing a compound...Ch. 13 - For the countershaft in Prob. 3-72, p. 152, assume...Ch. 13 - Prob. 39PCh. 13 - Prob. 40PCh. 13 - Prob. 41PCh. 13 - Prob. 42PCh. 13 - The figure shows a 16T 20 straight bevel pinion...Ch. 13 - The figure shows a 10 diametral pitch 18-tooth 20...Ch. 13 - Prob. 45PCh. 13 - The gears shown in the figure have a normal...Ch. 13 - Prob. 47PCh. 13 - Prob. 48PCh. 13 - Prob. 49PCh. 13 - The figure shows a double-reduction helical...Ch. 13 - A right-hand single-tooth hardened-steel (hardness...Ch. 13 - The hub diameter and projection for the gear of...Ch. 13 - A 2-tooth left-hand worm transmits 34 hp at 600...
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