Speed reduction means

Machine element or mechanism – Gearing – Plural power paths to and/or from gearing

Patent

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Details

74206, F16H 1308

Patent

active

041899610

ABSTRACT:
The speed reduction means comprises a stationary hollow cylindrical body supporting for rotation about a common axis coaxially arranged rotary input body and rotary output body. A primary set of power transmitting balls is arranged at regular intervals in two mutually shifted rows forming a zig-zag pattern between the power input rotary body and the power output rotary body. A secondary set of power transmitting balls arranged at regular intervals in a single row is disposed between the power output body and the two rows of balls in the primary set. The bearing surface of the power input body defines an eccentric portion which compresses at one point the primary set of balls in radial direction thus displacing the secondary set of balls in axial direction to meander between the two rows of balls. One of the sets of balls is held in a fixed position by the stationary body and the single row in the secondary set includes n balls and each row in the primary set includes n+1 balls so that a speed reduction ratio of 1/(n+1) of the input rotational speed is obtained.

REFERENCES:
patent: 2536803 (1951-01-01), Gleason
patent: 3327566 (1967-06-01), Hewko
patent: 3375739 (1968-04-01), Nasvytis
patent: 3955661 (1976-05-01), Popper et al.
IBM Technical Disclose, vol. 15, No. 6, Nov. 1972, "Speed Reducer" by J. H. Rhodes, Jr.

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