Variable speed transmission device

Machine element or mechanism – Mechanical movements – Grip units and features

Patent

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Details

74190, F16H 1506, F16H 1516

Patent

active

041127803

ABSTRACT:
A variable speed transmission device including a torque variator of the type in which a first rotatable element is in rolling friction engagement with a second nutatable element having an axis movable in a biconical path about the axis of the first element. The first element supports a pair of axially movable cone-like members fixed for rotation with the first element and each having exterior surfaces of revolution defined by a curved generatrix to be convex in axial section and converging away from a point of first and second element axes intersection. The rolling friction surfaces of the second element are defined by interior cylindrical surfaces on a tube-like member and means are provided for adjusting the angle of the second element axis with respect to the first to vary the radii at the point of frictional contact on the cone-like members. A third element rotatable on the first axis extends through the tube-like second member and is cut away to enable the frictional engagement of surfaces on the cone-like members with the internal surfaces of the second element. The third element carries adjustably eccentric journals having fluid control means operable in diammetrically opposite directions to vary the angle at which the axis of the second element intersects the axis of the first element. Input torque is preferably provided by a clutch to the third element whereas the variable speed output of the variator is transmitted through a multi-speed shiftable gear train.

REFERENCES:
patent: RE29328 (1977-08-01), Kemper
patent: 1022845 (1912-04-01), Hipple
patent: 1050704 (1913-01-01), Sparks
patent: 1069473 (1913-08-01), Ricard
patent: 1468401 (1923-09-01), Roberts
patent: 1844703 (1932-02-01), Thompson
patent: 2764029 (1956-09-01), Pernollet et al.
patent: 3955432 (1976-05-01), Kemper

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