15GearReduction

15GearReduction - gear, the worm creates an n-to-1...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Working with your Robot: Gearing Comp 106 Gear Reduction • What is it?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Gear Reduction • When the 8–tooth gear rotates 3 times, it advances the meshed gear by a total of 24 teeth. • Since the meshed gear has 24 teeth, it rotates exactly once. • This is a 3:1 ratio of gear reduction: three turns of the input gear causes one turn of the output gear. Gear Reduction • How to make a 9:1 ratio of output reduction?
Background image of page 2
Gear Reduction • By ganging together two 3-to-1 gear reductions, a 9-to-1 output reduction can be achieved. • The key is to use intermediary shafts that hold large input gears (e.g., a 24–tooth) and small output gears (e.g., an 8–tooth). A LEGO Geartrain
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
A LEGO Geartrain • A five-stage reduction using 8– and 24– tooth gears. • Can you find out the ratio of gear reduction in this gear train? The Worm Gear • A fascinating invention.
Background image of page 4
The Worm Gear • When meshed with a conventional round
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: gear, the worm creates an n-to-1 reduction: each revolution of the worm gear advances the opposing gear by just one tooth. It takes 24 rotations of the worm to revolve the 24tooth round gear once. The Worm Gear The worm gear loses a lot of power to friction, so it may not be suitable for high performance, main drive applications. If your robot is too heavy, a worm gear drive may not work well as its main drive. Worm Gear cant be back-driven. Is this property useful? Changing Axis of Rotation The Crown Gear The 8tooth gear, in conjunction with the 24-tooth crown gear , is used to change the axis of rotation in a gear train Changing Axis of Rotation The Bevel Gear To change the angle of rotation of shafts in a gear train with a 1:1 ratio. In the example below, they are used to effect a change in the horizontal plane...
View Full Document

Page1 / 6

15GearReduction - gear, the worm creates an n-to-1...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online