Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Locking means
Patent
1997-08-19
1999-09-14
Jeffery, John A.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Locking means
74813C, B23Q 1602
Patent
active
059505036
ABSTRACT:
An assembly for carrying out operations in the transfer, manufacture, or assembly of components having an open center turntable, rotatable about a vertical axis, having a number of work positions adapted for alignment with component supply, assembly, and removal. The platform is movably borne on an open center fixed base support, by means of bearings journalled between the support and the turntable proximate the work force exerted on the component at the turntable work station. The platform is rotated about the open center fixed support by means of a substantially circular drive hub attached to the platform. A drive belt, coupled to the drive pulley of a motor, located beneath the platform peripherally engages the drive hub about a circular belt raceway attached to the hub. As the drive pulley rotates, the turntable rotates through a defined set of motions by means of the drive belt arrangement. Complex motion profiles such as indexing, continuous and variable speed rotation, reversing, and oscillating can be accomplished, at varying table angles with diminished drive power requirements, due to reduced table inertia. The underneath driven, open center turntable provides increased work space, tool placement and the ability to place one table interior another.
REFERENCES:
patent: 748116 (1903-12-01), Stoll
patent: 4237796 (1980-12-01), Gordon et al.
patent: 4987765 (1991-01-01), Nishimura et al.
patent: 5694685 (1997-12-01), Millas
patent: 5784932 (1998-07-01), Gilberti
Battista MaryAnn
Jeffery John A.
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