Patent ID: 8028605
Filing Date: 2011-10-04
Classification: B23Q,Y10T

Abstract:
1. A circular dividing table for a machine tool, comprising: a housing, a spindle supported rotatably in the housing by a bearing, a stator of a motor secured to the housing therein, a rotor of the motor secured to the spindle so as to confront the stator, and directly driving the spindle to rotate by a predetermined angle, a brake disc secured to the spindle, and which may contact a face of the housing so as to be clamped to the housing, a face plate secured to the spindle, and a clamping device for clamping the rotor to the housing in a halting angular position by pressing a floating pad against the brake disc, thereby causing the brake disc to contact the face of the housing, wherein said clamping device comprises wherein said floating pad has a cylindrical bore formed in a central portion thereof and at least one bracket extending into the cylindrical bore, and wherein said floating pad disengaging means comprises a floating pad return plate which is integrally secured to the piston, said floating pad return plate being positioned in said cylindrical bore of the floating pad and being engageable with said at least one bracket of the floating pad during retraction of the piston.