Gears
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Gears PowerPoint PPT Presentation


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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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Gears

Gears


Worm drive

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


Spur gears

http://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


Crown gear

http://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


Information sources

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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