Drive for relatively axially shifting chuck parts

Details Drive for relatively axially shifting chuck parts Drive for relatively axially shifting chuck parts

1990-02-01

1991-04-09

Schmidt, Frederick R.

Turning

Lathe

Headstock

82132, 82145, 82147, B23B 3128

Patent

active

050054538

ABSTRACT:
A machine tool has a housing normally rotated about a housing axis and a part that is axially movable relative to the housing to adjust the tool. An adjustment apparatus for the tool has a drive having a rotary drive output, a differential transmission having a rotary input connected to the drive output and a pair of transmission outputs. This transmission includes a reverser for rotation of one of the transmission outputs opposite that of the other transmission output. Respective wheels coupled to the transmission outputs are rotatable coaxially on the tool housing and respective screws are rotationally coupled to the wheels, axially fixed on the tool housing, and both threaded in the movable part of the machine tool. According to this invention one of the screws is of opposite hand to the other screw.

REFERENCES:
patent: 2947188 (1960-08-01), Bullard
patent: 4386544 (1983-06-01), Fuminier
patent: 4411178 (1983-10-01), Wachs et al.
patent: 4567794 (1986-02-01), Bald
patent: 4573379 (1986-03-01), Bald
patent: 4573380 (1986-03-01), Bald
patent: 4644819 (1987-02-01), Zugel

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