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Article | REF: B5640 V1

Gear speed reducers

Author: Robert LE BORZEC

Publication date: November 10, 1992

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7. Mixed compound groups

Series grouping is required when the transmission ratio becomes important. Parallel grouping is of interest when low-speed torque increases and you want to reduce dimensions. It is therefore possible to imagine mixed groupings such as those shown in figure 33 :

  • on figure 33 a, an elementary coaxial gearbox with an intermediate shaft followed by two fixed-ring planetary gear trains with three planetary gears ensures a limiting reduction ratio of the order of 1,000, using coaxial shafts;

  • on figure 33...

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