Types of Gears
the teeth meet on a flat surface
spur gear
bevel gears
Can opener
Cars
A blender
Hand drills
Printing presses
What is the driver gear?
The first gear in a gear train. It is the one that is being moved by someone or something.
How do the bicycle gears work? mesh?
They do not mesh with each other they mesh with a change which turns both gears. Like a combined gear and pulley system.
The teeth of a screw mesh with the teeth of a spur gear
worm gear
worm gears
Fans
Guitar
Music box
Pencil sharpener
What is an idler gear?
Put in-between the driver gear and the driven gear to change the direction to ensure the driver gear and driven gear are moving the same direction.
What happens when you have the front gear (pedal) and back gear (wheel) the same size. When is this good to use?
You gain no mechanical advantage. Your force is equal to your speed.
When biking on flat surfaces
has teeth that are at a right angle to the face of the wheel
crown gear
crown gears
-power tools
What is the driven gear?
The gear that is the last gear on a gear train and is being moved by the other gears.
What happens when the front gear (pedal) is smaller and the back gear (wheel) is bigger?
When would you use this combination?
You use more speed and energy to pedal but increase your force.
Good for going up steep hills (more power/less effort)
single gear called a pinion meet with a toothed rack
rack and pinion
spur gears
Bicycles
Clocks
Wind up toys
Cars
White out
What is a gear train?
More then two gears meshing together make a gear train.
What happens when the front wheel (pedal) gear is larger then the back wheel gear?
When would you use this?
You use more force but increase your output speed.
More force to pedal a larger gear but your back wheel turns faster.
You would use this for increase in speed.
two gears connect at an angle
bevel gear
rack and pinion
Escalator
Locomotive/trams that run on tracks
If the driver gear turns clockwise what direction will the driven gear turn if there is a idler gear on the gear train?
clockwise