gears

Question 1

types of gears

Answer 1

spur | bevel | rack and pinion | worm

Question 2

spur gear(most common) characteristics

Answer 2

*straight teeth + shaft attached parallel
*driver gear provides input movement | driven gear provides output movement
*counter-rotation
*no increase in speed between driver and driven

Question 3

bevel gear characteristics

Answer 3

*axes intersect each other
*gear is shaped like a cone
*change direction of movement

Question 4

bevel gears of equal size

Answer 4

equal size simply allow change to operating angle

Question 5

bevel gears of unequal size

Answer 5

allows mechanical advantage to be changed

Question 6

disadvantages of bevel gears

Answer 6

can only work with complementary gear/partner and no other

Question 7

rack and pinion gear characteristics

Answer 7

*changes linear motion to circular motion(vice versa)
*(flat)rack gear whose teeth mesh with (round)pinion

Question 8

worm gear characteristics

Answer 8

*large increases force/large decrease in speed
*made up of cylinder with spiral groove- when it rotates it causes gear to rotate as well
*worm and wheel transmit movement between shafts at (90°)

Question 9

what do idler gears do

Answer 9

in between 2 gears changes direction of movement(ensuring that both gears rotate in the same direction)

Question 10

4 functions of gears

Answer 10

1. change direction of movement
2. change direction of rotation
3. change type of movement
4. increase speed/decrease force

Question 11

gear ratio

Answer 11

driven/driver