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COAXIAL TWO-STAGE DOUBLE STRAIN WAVE GEARING MECHANISM WITH AN ELLIPTICAL WAVE GENERATOR

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Wave generator 1 is a cam of elliptical shape and rotates about fixed axis A. The flexible (radially deflectable) link consists of external ring gears 2 and 4, rigidly attached to (or integral with) each other, with numbers of teeth, z₂ and z₄, that differ only slightly. Flexible ring gear 2 meshes at two opposing areas with circular internal gear 3 which is rigidly attached to the base, i.e. fixed. Flexible ring gear 4 meshes at two opposing areas with circular internal gear 5 which rotates about fixed axis B. The transmission ratio from wave generator 1 to gear 5 is i₁₅=ω₁/ω₅=n₁/n₅=(z₃z₅)/(z₅-z₃+2) where ω₁, ω₅, n₁ and n₅ are the angular velocities and speeds (in rpm) of generator 1 and gear 5; and z₃ and z₅ are the numbers of teeth of gears 3 and 5, which are equal to z₃=z₂+2 and z₅=z₄+2.
$2929$CxG,SW$

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Documents: Gear mechanisms  [Streambook]
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