Gears and basic concepts

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Gears / Cogs:

Gadgets that can change speed, torque,direction of power source.

Principle is similar to that of levers.

Gear ratio = No of teeth (Follower)/No of teeth(Driver)

Gear:

Here the driver gear moves the follower gear. Both have same number of teeth and gear ratio is 1. 

If Driver rotates in clockwise then follower rotates in anti-clockwise or vice versa.

 

Perpendicular Gear:

Change the direction of rotation from front to top. Front clockwise, top anti-clockwise viceversa

Orthogonal gears:

Change the direction of rotation from front to right/back to left .

Front-Clockwise, Right -anticlockwise and vice versa


Gearing up:

Driver gear (teeth) > Follower gear (teeth)

Driver gear(speed) < Follower gear (speed)

Driver gear(torque) > Follower gear(torque)

Gear ratio = No of teeth(Follower)/No of teeth(Driver) = 6/14

Gearing down:

Driver gear (teeth) < Follower gear (teeth)

Driver gear(speed) > Follower gear (speed)

Driver gear(torque) < Follower gear(torque)

Gear ratio = No of teeth(Follower)/No of teeth(Driver) = 14/6


Gear train:

multiple gears (alternate is to use belt instead of IDLER gear)

Driver

idler

Follower

-driver and follower rotate in same direction

Gear ratio = No of teeth(Follower)/No of teeth(Driver) = 14/14 (idler doesn't count)





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