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GEAR TRAIN QUESTION

V. Ryan 2003

 

1. A shop owner has approached your design company to make a mechanical toy based on a head turning. The owner would like your company to manufacture a shop display that is eye catching for passers-by.

The animation to the left shows the intended idea. As the round handle turns the head also rotates.

   

(a) Using the incomplete diagram opposite, sketch a mechanism that would convert the rotary motion of the handle into rotary motion of the head.

   

 

   

(b) The shop owner has decided that the model should be motorised and he has sketched the drawing opposite.

 

 
(c) If the motor turns in a clockwise direction, which direction will gear X turn ?
   
(d) What is the name of the gear arrangement shown in the diagram above ?
   
(e) The motor turns at 180 rpm. How fast will gear Y turn ?
   
   
   
(f) How fast will gear X turn ?
   
   

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