Question

Gear, one of a set of toothed wheels that work together to alter the relation between the speeds of a driving mechanism had been widely used nowadays especially in transportation industry such as car, ship and aircraft. By providing diagrams / figures, explain FOUR (4) types of gears.
(10 marks)

Answer 1

Straight bevel gears are gears that translate torque in perpendicular momentum, virtual axes are perpendicular and cross eash other. Either gear can be driven or a pinion gear (gear that provides torque to other gears). Disadvantages: due to short tooth length, they can relatively quickly wear out.

Miter gears are a type of bevel gears capable of translating torques in perpendicular directions. Advantages: can last longer because the tooth length is longer. Disadvantages: more difficult design and manufacturing.

Worm gear: can translate torque in perpendicular momentum but unlike in the previous cases, the axes do not cross each other. Only worm gear (upper) can drive the mechanism; the lower gear cannot translate torque to the worm gear. Advantages: compact but reduces speed and increases torque more effectively than other types of gears.

Rack and pinion: a type of simple cylindrical gears. The rack can be considered as a gear of infinite diameter. Both can provide or receive torque.

Source of image: https://www.mechanicalbooster.com/2017/02/types-of-gears.html