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Gears Changing the direction of motion. |
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Adjacent gears on a gear train rotate in opposite directions. Notice how the driver rotates clockwise while the follower rotates anticlockwise. |
The addition of a third gear makes the follwer and driver rotate in the same direction. |
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The above gearing system is called a rack and pinion. Circular motion is changed into linear motion. If the pinion rotates in a fixed position the rack moves in a linear motion. |
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If the rack remains stationary the rotating pinion moves along the rack in a linear motion as shown on the diagram on the left. |
