Screw and follower positioning device

Details Screw and follower positioning device Screw and follower positioning device

1974-11-15

1976-08-17

Vlachos, Leonidas

Machine element or mechanism

Gearing

Directly cooperating gears

74 8915, 82 27, F16H 2702, F16H 2522

Patent

active

039747093

ABSTRACT:
A high speed positioning device having a lead screw, a slidable frame and a screw engaging roller assembly supported by the frame for axial movement along the screw. The screw engaging roller assembly includes a pair of opposed rollers supported by a pair of pivoted, spring biased roller carriers which urge the rollers into meshing engagement with the lead screw to move the assembly and consequently the frame relative to the screw as the screw is rotated relative to the frame. Each roller has two degrees of rotational freedom with respect to its associated roller carrier to follow the helical threads of the lead screw. This arrangement provides an anti-backlash coupling between the lead screw and the screw roller assembly, thereby permitting accurate high speed positioning of parts, probes, machine tools and the like.

REFERENCES:
patent: 1918587 (1933-07-01), Bryant
patent: 2365654 (1944-12-01), White
patent: 2756606 (1956-07-01), Staples
patent: 2969689 (1961-01-01), Martens
patent: 3169407 (1965-02-01), Newell
patent: 3289061 (1966-11-01), Stratman
patent: 3398599 (1968-08-01), Hill
patent: 3533298 (1970-10-01), Gerber
patent: 3745840 (1973-07-01), Guralnick

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