engleski

Basic Kinematic Characterstics of Two-Speed Planetary Gear Trains with Brakes on Single Shafts

This paper deals with compound two-carrier planetary gear trains (PGTs) with two coupled and four external shafts. Primarly, all possible structural schemes and systematization of these transmissions are pointed. Further research has been made into gear trains using coupling shafts for power input and output, with the controlling brakes acting on single external shafts. The transmission ratio of the PGT is changed by alternating activation of each brake. The kinematic schemes of all analysed PGT variants have been created, and the available transmission ratio ranges have been calculated for both speeds. Also, in some applications it can be necessary to achieve a predefined step between the two transmission ratios, with the actual transmission ratios being irrelevant. Since that, transmission ratio step is indicated too.

Two-Speed Planetary Gear Trains, Brakes on single shafts, Transmission ratio, Ideal Torque Ratio, Transmission Ratio step

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