Science SQ: Gears and Belts
when a car is traveling straight, the half shafts rotate at _______ speed.
The same
How many differentials does a four-wheel drive car have?
2 differentials
Describe how a belt works.
A belt involves two wheels connected By a belt. if the wheels are of unequal sizes, the larger wheel rotates with greater force but less speed than the smaller wheel. Both Wheels rotate in the same direction.
What type of gear uses toothed wheels that intermesh an angle to change the direction of rotation?
A bevel gear
What type of gear uses a shaft with a screw thread and a toothed wheel to change the direction of motion?
A worm gear
Typically, worm gears are used to _______ the speed of rotation.
Decrease
What is the function of The Idler Wheel on the selector rod?
The Idler Wheel engages the reverse gear Wheels to make the transmission shaft turn in the opposite direction to back up the car.
How does the size of two intermeshing gears affect the speed and direction of force?
The bigger the difference in size between the two intermeshing gears, the bigger the difference in speed and force. intermeshing gears rotate in opposite directions.
for a typical rear- wheel drive car, what turns the differential?
The transmission shaft from the gearbox
What is the function of a car differential?
a differential adjust the speed at which the wheels on a car turn in order to allow the car to travel smoothly through a corner
what causes the beater Blades of an old fashioned egg whisk to rotate in opposite directions?
a double sided Crown gear sits between to Bevel pinion gears, causing the bevel pinion gears to rotate in opposite directions
what turns the hands of a clock?
a driving wheel connected to pinions that turn the hour and minute Spur Gears
what typically powers a mechanical clock?
a falling weight or unwinding spring
What type of gear contains a gear ring, Sun Gear, and Planet gear?
an epicyclic or planetary gear.
A derailleur gear is the gear mechanism found in
bicycles.
What is the difference between the rotation of intermeshing gears and belt driven Wheels?
intermeshing gears rotate in opposite directions oh, well belt driven Wheels rotate in the same direction.
what is a drill chuck?
it is the mechanism that fashions a drill bit into a drill and keeps the drill bit from coming loose when a drill is in operation
what are two examples of mechanisms that use rack and pinion gears?
manual steering in a car and corkscrews.
What is another name for a bevel gear?
pinion and crown wheel, or pinion and ring gear
What type of gear is used to create reciprocating motion?
rack and pinion gears
what is the function of the clutch in a car?
the clutch allows a driver to change gears by disengaging and engaging the crankshaft from turning the gearbox
how do the gears in the egg whisk create enough speed for the beaters to operate?
the difference in size between the large Crown gear and small bevel gears create the speed for operating the Whisk
what is the function of dog teeth on the transmission shaft?
the dog teeth lock the selected gear wheel to the transmission shaft, causing the transmission shaft to rotate at a given speed.
what is the function of the escapement in a timepiece?
the escapement controls the speed at which the driving wheel turns.
what is the function of the gearbox in a car?
the gearbox reduces the speed rotation of the engine's crankshaft to keep the car engine running at its most efficient rate.
How is the collar around the drill chuck tightened?
the key pinion rotates the collar that turns a screw inside the collar that tightens the Jaws' grip on the drill bit
What drives a lawn sprinkler?
the movement of water through a turbine and system of worm gears.
what parts engage within the differential when a car turns a corner?
the planet pinions engage with the sun gears within the differential to allow each hack shaft to rotate at different speeds.
What are the four basic types of gears?
Rack and pinion gears, spur gears, bevel gears, and worm gears.
what types of gears are commonly found in mechanical clocks and watches?
Spur Gears
