GB190621820A - Improvements relating to Epicyclic Driving Mechanism for Cycles - Google Patents

Abstract

21,820. Reilly, A. H. Oct. 3. Driving - mechanism.-In a three - speed coaster hub for cycles, of the type in which two sets of planet-pinions c, d upon a common carrier b gear with sun-pinions f, g freely mounted upon the spindle and pressed together by springs k, the driven internal ring being in one-way clutch connexion with the hub, a second one-way clutch is provided between the carrier and the hub. For the high speed, the pinion f is forced inwards into engagement with a stationary clutch-piece h, the pinion. g being locked at l<1> to the driving-ring l and the hub being driven through a one-way clutch a. On allowing the sun-pinion f to move out of engagement with its clutch - piece, the pinion g being still locked to the driving-ring, a direct drive is obtained through the free-wheel clutch p between the carrier and the hub. By pressing the sun-pinion g into engagement with a fixed clutch-piece i, a low-speed drive is furnished through the ring l, pinions d, carrier b, and clutch p. The pinion is grooved at g<1> to prevent clutching with the driving-ring when the parts are in the low-speed position. In a modification, the righthand sun-pinion is adapted to be clutched to the carrier instead of to the driving-ring, a clutch-ring with recesses to engage the axles of the planetwheels being provided between the two sets. According to the Provisional Specification, both sunpinions may be arranged to be locked to the carrier for the direct drive.