Gears 1 Flashcards

1
Q

What is a gear?

A

A rotating machine part having cut teeth, or cogs, that mesh with another toothed part in order to transmit torque.

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2
Q

Two or more gears working in tandem, producing a mechanical advantage through a gear ratio

A

A transmission

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3
Q

What is an advantage of gears?

A

They prevent slipping

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4
Q

List the 5 design categories of gears

A

Spur
Helical
Bevel
Hypoid
Worm

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5
Q

What is the simplest type of gear?

A

Spur gear or straight tooth

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6
Q

Gear that has straight teeth and are parallel to the axis shaft.

A

Spur gear

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7
Q
A

Helical gear

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8
Q

In a planetary gear set up the run and sun gear are turning which direction

A

Opposite of each other

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9
Q

A type of Gear that has a linear actuator that is comprised of a pair of gears that converts rotational motion into linear motion

A

A rack and pinion

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10
Q

When a design requires shafts to transmit power at different angles.
This gear is used in light to moderate loads. #4

A

Cross axis helical gear

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11
Q

All worm gears are what angle drives?

A

Right angle

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12
Q

In a worm gear what is the pinion and what is the worm?

A

Pinion is the worm
Gear is the wheel

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13
Q

Gears that have teeth across the face at an angle

A

Helical

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14
Q

Gear that has two pairs of opposed gear teeth to eliminate thrust load

A

Double helical

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15
Q

What gear is the simplest and most common?

A

Spur gears

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16
Q

How do we know the pinion gear from the driving gear?

A

Smaller is pinion
Biggest gear is the gear

17
Q

Why are spurs gears the most widely used gear?

A

Low cost
Lack of end thrust
Low Maitnence

18
Q
A

Spur gear

19
Q

The three types of worm gears are?

A

Cylindrical
Single enveloping
Double enveloping

20
Q

What is a disadvantage of bevel gears?

A

They produce a thrust load

21
Q

Beveled gear types (4)

A

Zerol
Straight
Spiral
Skewed