Simple planetary gearsets are being discussed. Technician A says any one of the three members can be used as the driving or input member. Technician B says the ring gear is always the driving or output member. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct because in a simple planetary gearset, any of the three members (the sun gear, the planet gears, and the ring gear) can be the driving or input member, depending on the desired gear ratio and direction of rotation. Technician B is incorrect because the ring gear can be either the driving/input member, the driven/output member, or held stationary, depending on the specific application and configuration of the gearset.

Simple Planetary Gearsets Are Being Discussed