Home
Explore
Exams
Search for anything
Login
Get started
Home
Engineering
gears cams followers
0.0
(0)
Rate it
Studied by 1 person
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Card Sorting
1/151
Earn XP
Description and Tags
Engineering
Add tags
Study Analytics
All
Learn
Practice Test
Matching
Spaced Repetition
Name
Mastery
Learn
Test
Matching
Spaced
No study sessions yet.
152 Terms
View all (152)
Star these 152
1
New cards
Simple Machines
- make effort easier
2
New cards
- changes direction or magnitude of force applied for work
3
New cards
Compound Machines
multiple simple machines working together
4
New cards
6 Simple Machines
- Inclined Plane
5
New cards
- Wedge
6
New cards
- Lever
7
New cards
- Pulley
8
New cards
- Screw
9
New cards
- Wheel and Axle
10
New cards
Inclined Plane
Stationary, flat surface set at angle
11
New cards
- as distance of slope increases, force decreases, greater mechanical advantage
12
New cards
13
New cards
Ex:
14
New cards
- ramp
15
New cards
- ladder
16
New cards
- staircase
17
New cards
18
New cards
19
New cards
SLOPE IS MECH ADVANTAGE
20
New cards
Wedge
Moving inclined plane that moves through a load
21
New cards
- thinner the wedge, bigger the mechanical advantage
22
New cards
23
New cards
24
New cards
SLOPE IS MECH ADVANTAGE
25
New cards
1st Class Lever
fulcrum between effort and load
26
New cards
- fulcrum midpoint: no advantage
27
New cards
- fulcrum close to effort: distance amplified
28
New cards
- fulcrum close to load: effort amplified
29
New cards
2nd Class Lever
load between fulcrum and effort
30
New cards
- load closer to fulcrum, increased mech advantage
31
New cards
- effort force is amplified
32
New cards
Ex:
33
New cards
Wheelbarrow
34
New cards
3rd Class Lever
effort between load and fulcrum
35
New cards
- moves load over longer distances and reduces effort
36
New cards
Ex:
37
New cards
Baseball bat
38
New cards
fishing rod
39
New cards
Wheel and Axle
a simple machine consisting of two circular objects of different sizes; the wheel is the larger of the two circular objects
40
New cards
- large force applied to axle, greater distance of wheel
41
New cards
- small force applied to wheel, large torque on wheel
42
New cards
43
New cards
RADIUS OF WHEEL OR AXLE IS MECH ADVANTAGE
44
New cards
Pulley
A simple machine that consists of a rope that fits into a groove in a FREE SPINNING wheel
45
New cards
- Fixed pulley: changes direction of force but no mech advantage
46
New cards
- Single movable pulley: effort is halved, distance increase by factor of two
47
New cards
- Block and Tackle: multiple pulleys, effort is reduced but amount of rope is increased
48
New cards
49
New cards
50
New cards
\# OF PULLEYS AND ROPE LENGTH IS MECH ADVANTAGE
51
New cards
Screw
a simple machine that consists of an inclined plane wrapped around a cylinder
52
New cards
- converts rotary motion to linear motion
53
New cards
- large output forces
54
New cards
55
New cards
Pitch: linear distance traveled in one revolution, small pitch is greater force
56
New cards
Types of Mechanical Motion:
- Linear: straight line (box up a ramp)
57
New cards
- Reciprocating: back and forth (saw)
58
New cards
- Rotary: continuous circular (fan)
59
New cards
- Oscillating: back and forth along an arc on a pivot (pendulum)
60
New cards
- Intermittent: starts and stops predictably (clock)
61
New cards
- Irregular: no pattern (robot)
62
New cards
Mechanism
A system of mechanical parts connected to a drive source
63
New cards
- Transfer between types of motion
64
New cards
- to classify as mechanism, must have a predictable output motion based on known input motion
65
New cards
Gear
A circular toothed object used to transfer rotary motion and torque from one shaft to another
66
New cards
Torque
rotational force
67
New cards
Gear Train
- 2 or more gears in mesh
68
New cards
- only one gear per shaft
69
New cards
- small gear to big: more force
70
New cards
- big gear to small: more speed
71
New cards
- changes or maintains rotational direction
72
New cards
In order to Mesh...
Pressure Angle: Angle of the gear tooth itself
73
New cards
Gear Pitch: Number of gear teeth per arc length
74
New cards
Pitch Circle: Where the gear teeth meet the circumference of the wheel;
75
New cards
all must be equal to the second gear in mesh
76
New cards
Pinion
smaller of two gears
77
New cards
Compound gear train
two gears of different sizes are locked to the same idler gear shaft. Have a greater ability to increase/decrease rotational speed and torque.
78
New cards
Drive gear
the input gear
79
New cards
Driven gear
the output gear
80
New cards
Idler
bridges the gap between input and output gear, may be used to change rotational direction
81
New cards
Gear ratio
\# teeth in driving gear (front)/\# teeth in driven gear (rear)
82
New cards
Spur gear
- straight cut teeth, uses parallel shafts
83
New cards
Pros: low cost, easy to build, high precision
84
New cards
Cons: limited distance, not good at high speeds or stress
85
New cards
Helical Gear
- angled teeth, smoother, greater load capacity
86
New cards
Pros: less slipping, smoother, greater load
87
New cards
Cons: costly, runs hotter
88
New cards
Bevel Gear
- used for perpendicular shafts, tapered teeth, designed in pairs
89
New cards
Pros: high speed without speed loss
90
New cards
Cons: difficult to design
91
New cards
Rack and Pinion
- linear gear (Rack) moving circular spur gear (pinion), converts between rotary and linear motion
92
New cards
Pros: easiest and cheapest way to slow speed
93
New cards
Cons: noisy with friction
94
New cards
Worm gear
- screw and wheel perpendicular to each other
95
New cards
- causes speed reduction and increase in torque
96
New cards
Pro: high reduction ratio, self-locking
97
New cards
Cons: high heat and inefficient
98
New cards
Cam
rotating machine component that has an irregularly curved outline; transmits a specific or continuous motion to the follower
99
New cards
Follower
paired with a cam, follows the outline of the cam; transmits reciprocating or oscillating motion to other machine parts.
100
New cards
Cam Types
- Plate or Disc: follower follows circumference of cam
Load more
Explore top notes
UNIT 4 LESSON 9 – CHEMISTRY OF THE ATMOSPHERE
Updated 332d ago
Note
Preview
Chapter 24: The West and the World
Updated 1075d ago
Note
Preview
chapter 3: a&p (cells)
Updated 318d ago
Note
Preview
Circuits
Updated 740d ago
Note
Preview
Elmyr de Hory
Updated 758d ago
Note
Preview
Positive Psychology: Positive Environments
Updated 937d ago
Note
Preview
Poetic Devices
Updated 86d ago
Note
Preview
AP World History - Unit 2: Networks of Trade
Updated 746d ago
Note
Preview
Explore top flashcards
Human Anatomy and Physiology Final Exam!!!!!
Updated 139d ago
Flashcards (134)
Preview
CH. 15 voca
Updated 378d ago
Flashcards (47)
Preview
Niemiecki ubrania
Updated 108d ago
Flashcards (40)
Preview
Quiz #2-Textbook Vocabulary Unit 7
Updated 58d ago
Flashcards (43)
Preview
Geography - Weather hazards
Updated 894d ago
Flashcards (48)
Preview
Apush mad ting
Updated 59d ago
Flashcards (68)
Preview
Roman Art and Archaeology: Week 7
Updated 760d ago
Flashcards (30)
Preview
Chapter 36
Updated 222d ago
Flashcards (87)
Preview