Rotary index table assembly

Details Rotary index table assembly Rotary index table assembly

B - Operations, Transporting

23

Q

B23Q 16/02 (2006.01) B23Q 1/00 (2006.01) B23Q 1/38 (2006.01) B23Q 16/06 (2006.01) B23Q 16/10 (2006.01) F16D 1/06 (2006.01) F16D 3/20 (2006.01)

Patent

CA 2124661

ROTARY INDEX TABLE ASSEMBLY ABSTRACT A rotary index table assembly is disclosed as including an annular positioning mechanism (22) that cooperates with an air bearing (30) to accurately position a rotary index table (14) on a base (12). The annular positioning mechanism (22) includes a base mounted crown gear (24), a table mounted crown gear (26) and a movable crown gear (28) that is moved out of engagement with the base and table mounted crown gears to permit the indexing rotation and that is thereafter moved into engagement with the base and table mounted crown gears to locate the table with respect to the base while the air bearing supports the table on the base to permit the accurate positioning. A rotary drive (18) of the table assembly is preferably constructed to include a double enveloping worm gear set (32) and a polygonal drive coupling (34) that are capable of transmitting relatively large torque to the table while still having a compact construction.

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