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Gears

Gears. Animated!. http://en.wikipedia.org/wiki/File:Worm_Gear.gif. http://openmoco.org/article/selecting-gearing-your-motion-control-rig. Worm Drive. 2 Parts Worm – gear in screw form Worm Gear – meshes with the worm to create a worm drive Perpendicular drive axes

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Gears

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  1. Gears

  2. Animated! http://en.wikipedia.org/wiki/File:Worm_Gear.gif http://openmoco.org/article/selecting-gearing-your-motion-control-rig Worm Drive • 2 Parts • Worm – gear in screw form • Worm Gear – meshes with the worm to create a worm drive • Perpendicular drive axes • Direction of transmission not reversible • Large gear reductions (20:1 – 300:1+) • Changes direction of motion 90° • Used in: gates, high-performance cars

  3. http://www.machsources.com/productimages/20923/40cr-spur-gear.jpghttp://www.machsources.com/productimages/20923/40cr-spur-gear.jpg Spur Gears • Simplest and most common gear type • Cylinder/disk with radially projecting teeth • Teeth are straight and parallel to rotational axis • Noisy, teeth under a lot of stress during each repetitive impact • Used in: alarm clocks, washing machines, clothes dryers http://usa.autodesk.com/adsk/servlet/item?siteID=123112&id=10008317&linkID=9242016

  4. http://upload.wikimedia.org/wikipedia/commons/3/34/Crown_gear.pnghttp://upload.wikimedia.org/wikipedia/commons/3/34/Crown_gear.png Crown Gear • Teeth project at right angles from the plane of the wheel • Reasons for use: • Excellent heat distortion control, High strength, Wear resistance, Noiseless and vibration-free operation, Fixes Misalignment • Used in high-stress junctions in cars Animated! http://www.zakgear.com/Scrown.html

  5. Information Sources • Worm Drive • http://science.howstuffworks.com/transport/engines-equipment/gear5.htm • http://en.wikipedia.org/wiki/Worm_drive • Spur Gears • http://science.howstuffworks.com/transport/engines-equipment/gear2.htm • Crown Gear • http://www.reliableplant.com/Read/22778/crowning-noise-reduction-gears

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