Rolling element jackscrew

Details Rolling element jackscrew Rolling element jackscrew

1984-08-28

1987-04-07

Hermann, Allan D.

Machine element or mechanism

Gearing

Directly cooperating gears

74459, F16H 2522

Patent

active

046551000

ABSTRACT:
An improved rolling element jackscrew includes at least three planetary rollers interposed between an inner shaft and an outer nut, wherein one of the shaft and nut is formed with grooved threads of zero pitch and the other bears a spiral or pitched thread having a different number of threads per unit length. The different thread numbers on the nut and shaft are chosen to provide a pattern of nodal points at which the thread crests intersect, with the nodal points arranged along a plurality of equiangularly spaced axial contact lines corresponding with the number of rollers and defining positions of roller installation. The rollers each include axially spaced pairs of enlarged ribs defining axially spaced grooves meshing between the shaft and nut at the respective nodal points.

REFERENCES:
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patent: 2924112 (1960-02-01), Martens
patent: 2966070 (1960-12-01), Wise
patent: 2966071 (1960-12-01), Wise
patent: 2974539 (1961-03-01), Martens
patent: 3014379 (1961-12-01), Wise
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patent: 3214991 (1965-11-01), Perrin
patent: 3226809 (1966-01-01), Perrin
patent: 3595094 (1971-07-01), Lemor
patent: 3726151 (1973-04-01), Lemor
patent: 3884090 (1975-05-01), Dock
patent: 4048867 (1977-09-01), Saari
patent: 4232695 (1980-11-01), Roberge

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