Planetary-friction type speed change device

Details Planetary-friction type speed change device Planetary-friction type speed change device

1994-05-13

1995-06-13

Bonck, Rodney H.

Planetary gear transmission systems or components

Planet pinion is friction gear

Planet pinion is ball

476 36, F16H 1306

Patent

active

054237254

ABSTRACT:
A planetary-friction type speed change device includes: (a) a sun roller arranged to rotate about an axis in response to a motive rotation; (b) an outer ring substantially coaxial with the sun roller; (c) a plurality of planetary rolling elements disposed between the sun roller and the outer ring to contact each of an outer circumferential face of the sun roller and an inner circumferential face of the outer ring; (d) a casing member for housing therein the sun roller, the plurality of planetary rolling elements, and the outer ring such that the outer ring is movable relative to the casing member; and (e) an elastic member, disposed within the casing member, for supporting and axially pressing the outer ring such that the outer ring is movable in a radial direction relative to the casing member. The rotation of the sun roller causes the plurality of planetary rolling elements to revolve, thereby producing a rotation output at a reduced speed.

REFERENCES:
patent: 1380006 (1921-05-01), Nielsen
patent: 2460629 (1949-02-01), Fawick
patent: 2901924 (1959-09-01), Banker
patent: 2997899 (1961-08-01), Thiele
patent: 3244026 (1966-04-01), De Kay
patent: 3688600 (1972-09-01), Leonard
patent: 3757608 (1973-09-01), Willner
patent: 3955661 (1976-05-01), Popper et al.
patent: 4258589 (1981-03-01), Mitchell

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