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PLANETARY HIGH-RATIO REDUCING GEAR MECHANISM

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Carrier 1 rotates about fixed axis A and is connected by a turning pair to rigidly attached planet gears 2 and 5. Gear 2 meshes with gear 4 which rotates about fixed axis B; gear 5 meshes with fixed sun gear 3. The numbers of teeth of gears 2, 3, 4 and 5 are related by the conditions: z₄=z₃+1 and z₅=z₂+1. The speeds n₁ and n₄ of carrier 1 and gear 4 (in rpm) are related by the equation n₄=n₁(1-(z₂z₃)/(z₄z₅))=n₁(1-(z₂z₃)/((z₃+1)(z₂+1))) where z₂, z₃, z₄ and z₅ are the numbers of teeth of gears 2, 3, 4 and 5. Thus, when carrier 1 rotates at high speed, gear 4 rotates at a much lower speed in the same direction.
$2888$CxG,PR$

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Documents: Gear mechanisms  [Streambook]
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