| Non-circular Gear |
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A non-circular gear (NCG) is a special Gear design with special characteristics and purpose. While a regular gear is optimized to transmit Torque to another engaged member with minimum noise and wear and with maximum Efficiency , a non-circular gear's main objective might be Ratio variations, axle displacement Oscillation s and more. The number of possible uses is limited only by the inventor's imagination and includes textile machines, Potentiometer s and CVTs ( Continuously Variable Transmission s). A regular gear pair can be represented as two Circle s rolling together without slip. In the case of non-circular gears, those circles are replaced with anything different from a circle. This is also the reason NCG in most cases is not round, however round NCGs looking like regular gears are possible too (small ratio variations result from meshing area modifications). Generally NCG should meet all the requirements of regular gearing, but in some cases, for example variable Axle distance, could prove impossible to support and such gears require very tight manufacturing tolerances and assembling problems arise. Because of complicated Geometry , NCGs are most likely Spur Gear s and Molding or Electrical Discharge Machining technology is used instead of generation. SEE ALSO REFERENCES |
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