Work holders – Holder mounted for movement – Relative to a station
Patent
1986-10-31
1987-08-04
Schmidt, Frederick R.
Work holders
Holder mounted for movement
Relative to a station
269 70, 74820, B23Q 116
Patent
active
046841148
ABSTRACT:
An index table comprising a base, a main plate mounted on the base, a drive wheel mounted for rotation on one side of the main plate about a first axis transverse to the main plate, a work plate on the other side of the main plate rotatably mounted about a second transverse axis spaced from the first transverse axis, and a segment wheel mounted on the one side of said main plate and fixed with relation to the work plate. Circumferentially spaced segment drivers are mounted on the drive wheel and are adapted to engage circumferentially spaced slots on the segment wheel to intermittently drive the segment wheel and in turn the work plate. A yoke plate is mounted on the one side of the main plate for movement radially with respect to the drive wheel and the segment wheel. As the drive wheel rotates, each segment driver engages the yoke plate and moves the yoke plate relative to the segment wheel. As the yoke plate is moved radially outwardly and inwardly, it swings arms pivoted to the main plate, moving pins on the arms into and out of engagement with the sides of a pair of adjacent spaced slots on the segment wheel to unlock and lock the work plate in position. Movement of the yoke plate also functions to operate oil pistons that supply lubrication to the index table.
REFERENCES:
patent: 2389744 (1945-11-01), Robbins
patent: 2535490 (1950-12-01), Emrick
patent: 3243676 (1966-03-01), Willmann
patent: 3606804 (1971-09-01), Gotz et al.
patent: 4049252 (1977-09-01), Bell
Schad Steven P.
Schmidt Frederick R.
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