81
PROBLEM 15.24
(Continued)
CRANKSHAFT ASSEMBLY
1
1
1
1
1
QTY DESCRIPTIONITEM
CRANKSHAFT ASSEMBLY BILL OF MATERIALS
DRIVE GEAR OFFSET SPACER A1
2
3
4
8
DRIVE GEAR RUBBER WASHER A
DRIVE GEAR RUBBER WASHER B
CRANKSHAFT
MAIN DRIVE GEAR
1
1
2
5
6
7
DRIVE GEAR OFFSET SPACER B
DRAG SPROCKET PIN
DRAG SPROCKET
CRANKSHAFT BILL OF MATERIALS
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82
PROBLEM 15.24
(Continued)
CRANKSHAFT PARTS
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83
PROBLEM 15.24
(Continued)
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84
PROBLEM 15.24
(Continued)
1
1
2
1
1
2
1
2
1
QTY DESCRIPTIONITEM
WINDING ASSEMBLY BILL OF MATERIALS
DRAG LEVER GUIDE BRACKET1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
DRAG LEVER SPRING PIN
SWING ARM PIVOT PIN
DRAG LEVER SPRING ARM
DRAG LEVER
PIVOT PIN
BRASS WASHER, I.D. = 4.1, O.D. = 8.1
1
1
1
1
1
1
1
1
SPRING, ASTM 228, 13AMW, I.D. = 3, 6 COILS, LEFT HAND STRAIGHT TORSION
SWING ARM, LEFT
CRANKSHAFT SPINDLE
SWING ARM, RIGHT
DRAG LOCK
DRAG LOCK GUIDE RIVET
DRAG LOCK GUIDE
DRAG LOCK PIVOT PIN
WINDING ASSEMBLY BASE
WINDING ASSEMBLY BASE RING
WINDING ASSEMBLY
WINDING BILL OF MATERIALS
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85
PROBLEM 15.24
(Continued)
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86
PROBLEM 15.24
(Continued)
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87
PROBLEM 15.24
(Continued)
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88
PROBLEM 15.24
(Continued)
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89
ENGINEERING CHANGES
Part 3: Problem 15.25
PROBLEM 15.25 Engineering changes
Your instructor will use your complete set of working drawings
to prepare a series of engineering changes. The complete set of
working drawings for your assigned or selected problem must be
completed, checked by your instructor, and edited as needed for
final grading before doing engineering changes. Confirm the
submittal process with your instructor.
ENGINEERING DESIGN PROBLEMS
Part 4: Problems 15.26 through 15.28
PROBLEM 15.26 Engineering design problem
If you were assigned or selected a problem that contained errors,
you can submit the correct completed problem to the publisher
of this textbook for possible use in future editions. Your submittal
should include the revised fully dimensioned isometric drawings
or dimensioned 3-D models and the correct set of 2-D working
drawings that you completed for your project. In addition, submit
your name and contact information; include a brief biography of
yourself for use in an acknowledgment if your work is selected for
use in the next edition of this textbook. Make a statement grant-
ing permission for the publisher to use your work. Send the elec-
tronic files to:
Cengage Learning
Care of author of Engineering Drawing and Design
Executive Woods
5 Maxwell Drive
Clifton Park, NY 12065
PROBLEM 15.27 Engineering design problem
Find a product of your choice that contains at least three or more
parts. You must be able to disassemble the product without de-
stroying. This is your responsibility. Use measuring tools such as
calipers and micrometers to establish dimensions. Establish fits
between mating parts. Create a set of working drawings for the
product, including a detail drawing of each part to be manufac-
tured on separate sheets. Create an assembly drawing with parts
list. Include any purchase parts in the parts list. Create fully di-
mensioned isometric drawings or dimensioned 3-D models for
your project. Submit the completed problem to the publisher of
this textbook for use in future editions. In addition, submit your
name and contact information and include a brief biography of
yourself for use in an acknowledgment if your work is selected
PROBLEM 15.24
(Continued)
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90
for use in the next edition of this textbook. Make a statement
granting permission for the publisher to use your work. Send the
electronic files to:
Cengage Learning
Care of author of Engineering Drawing and Design
Executive Woods
5 Maxwell Drive
Clifton Park, NY 12065
Part 4: Problem 15.28
PROBLEM 15.28 Engineering design problem
Using the drawings of the current adjustable wrench and the
discussion provided in the Engineering Design Application in
Chapter 1 of this textbook, redesign the adjustable wrench with
an ogee curved handle as described. Create the following:
■ a 3-D model of new ogee curved-handle adjustable wrench,
■ 2-D detail drawings of new ogee curved-handle adjustable
wrench;
■ a 2-D assembly parts drawing and parts list of new ogee
curved-handle adjustable wrench; and
■ catalog copy for marketing the new ogee curved-handle ad-
justable wrench.
MATH PROBLEMS
Part 5: Problems 15.29 Through 15.34
PROBLEM 15.29 Find dimension L in the following figure.
PROBLEM 15.30 Find angle u in the following drawing.
Refer to the following drawing of a general oblique triangle
(not drawn to scale).
PROBLEM 15.31 Find angle A if a 5 15.4, b 5 13.1, and
c 5 12.6.
PROBLEM 15.32 Find side c if C 5 61.58, a 5 7.56, and b 5
8.94.
PROBLEM 15.33 Find angle B if A 5 37.68, b 5 7.63, and c 5
8.72. (Hint: Find side a first.)
PROBLEM 15.34 Find angle C if a 5 10.1, b 5 15.3, and
c 5 12.7.
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200
Chapter 15
Working Drawings
Solutions to End-of-Chapter Problems
(Note: Sheet blocks are required, but not shown in problem solutions.)
Part 1: Problems 15.1 Through 15.22
PROBLEM 15.1 Plumb bob (metric)
201
PROBLEM 15.2 Hammer (in.)
202
PROBLEM 15.3 Key holder (in.)
203
PROBLEM 15.4 Lock nut wrench (in.)
(Note: Observe proper balloon placement in final drawing.)
PROBLEM 15.5 C-clamp (metric)
205
206
PROBLEM 15.7 No solution provided.
207
208
PROBLEM 15.9 No solution provided.
PROBLEM 15.10 No solution provided.
209