cgt 110 s 2013
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CGT 110 S 2013. Gears. Definition. A gear is a rotating machine part having cut teeth , or cogs , which mesh with another toothed part in order to transmit to torque. (Wikipedia) - PowerPoint PPT PresentationTRANSCRIPT
CGT 110S 2013
Gears
Definition A gear is a rotating machine part having
cut teeth, or cogs, which mesh with another toothed part in order to transmit to torque. (Wikipedia)
Two or more gears working in tandem are called a transmission and can produce a mechanical advantage through a gear ratio and thus may be considered a simple machine. (Wikipedia)
Types of Gears Spur Gear
Parallel axis Helical Gear
Parallel axis Helicoid teeth
Skew Gears Axis at right angle and do not intersect
Double Helical Parallel axis Right & Left helical teeth Balances axial thrust forces
Bevel Axis at right angle and intersect Cone Shaped
Gear Types (cont.) Spiral Bevels
A bevel gear with angled spiral teeth Hypoid
Common in differentials Hypoidcycle teeth
Crown (contrate) Type of bevel gear
Worm Axis at right angle and do not intersect One gear is in the form of a worm
Rack and Pinion Rack is straight gear Transmits linear motion
Non-Circular
Spur Gear
Helical Gear
Double Helical
Spiral Gears
Hypoid Gears
Crown Gear
Rack and Pinion
Non-Circular Gear
Gear Terminology
Tooth Profile
Involute Gear
http://www.excelcalcs.com/repository/machines/gears/involute-coords.xls/
Tooth Contact Nomenclature
Tooth Thickness Nomenclature
Pitch Nomenclature
Gear Blanks
Gear Manufacturing
Large Gears