Drive mechanism for a carriage

Details Drive mechanism for a carriage Drive mechanism for a carriage

1975-01-15

1976-08-31

Scott, Samuel

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

744248R, F16H 2702

Patent

active

039772624

ABSTRACT:
A drive mechanism includes a nut on a rotatable lead screw. The nut has a partially threaded and partially unthreaded axial bore and a mounting assembly to couple it to a linearly movable carriage. The mounting assembly includes diametrically opposed carriage-engaging lugs positioned on the drive nut near the threaded bore end and a locking arm slidably keyed into a slot in the carriage which mounts the drive nut for universal radial floating on the carriage. The drive nut may become slightly skewed relative to the axis of the lead screw in order to minimize frictional forces due to tolerance variations, bow in the lead screw, or axial misalignment of the lead screw with carriage guide rods. Kinetic-energy-induced bounce forces of the carriage are damped by a coil spring which also maintains the lugs against the carriage.

REFERENCES:
patent: 2555124 (1951-05-01), Gothberg
patent: 2838948 (1958-06-01), Lassy
patent: 2876653 (1959-03-01), Meyer
patent: 3106352 (1963-10-01), Bennett
patent: 3353718 (1967-11-01), McLay
patent: 3698257 (1972-10-01), Ballentine et al.

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