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US 4,071,940 AGranted
Clutch-brake unit for a press and method and jig for installing the same
AssigneeHazelton Products, Inc.
InventorBurton W. Hazelton
Life of this patent
Estimating the term…
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AssigneeHazelton Products, Inc.
InventorBurton W. Hazelton
Estimating the term…
A clutch-brake unit for a mechanical drive, such as used on a press, has a hub which fits over a spindle at the end of a driven shaft, which may be a crankshaft, and locates against a flange on the driven shaft, thereby enclosing the entire spindle. The hub has a flange portion which carries an annular piston, and the chamber in which this piston is located is in communication with the hub interior. The hub has a drive disk mounted on it by machine screws that extend axially through the drive disk, the flange portion of the hub, and thread into the flange on the driven shaft so as to secure the hub to the shaft. The drive disk is spaced from the flange portion of the hub, and interposed between the two is a brake disk, a pressure plate, and a transfer disk. The brake disk is connected to an anchor attached to the press frame, and the pressure plate is spring loaded so as to urge the brake disk against the flange portion of the hub and thereby impede rotation of the hub. However, when the interior of the hub is pressurized, the piston moves forwardly causing the pressure plate to relax the force on the brake disk. This releases the brake disk from the flange so that the hub can rotate. The piston also forces the transfer disk against the drive disk so that the rotation of the flywheel is imparted to the hub. The brake anchor is installed on the frame by first attaching it to a jig and passing the jig over the spindle to a position against the flange at the end of the spindle. This enables bolt holes to be made at the proper location in the supporting structure, such as a press frame, and facilitates the selection of shims or other spacers to locate the brake anchor in the proper axial position. As applied to a press, this proper position may be a machined boss on the frame of the press. The jig also has guide holes for locating those holes in the flange which receive the machine screws that hold the hub to the driven shaft.
A method for installing an air-operated clutchbrake unit on the spindle of a shaft which rotates in a press frame having a boss provided with a flat machined surface that is perpendicular to the axis of the spindle and is located near the spindle, the clutch-brake unit including a mounting hub configured to fit over the spindle and adapted to rotate with the spindle, a brake element located adjacent to the hub, a flywheel adapted to rotate relative to the hub and spindle about an axis coincident to the hub axis, means for coupling the flywheel with the hub, means for urging the brake element against the hub, and a brake anchor having a base and a pin projected from the base and capable of fitting into the brake element;
In combination with a press having a frame and a crankshaft spindle projecting from the frame, and with a clutch-brake unit that mounts on the crankshaft spindle and includes a mounting hub, a brake element located adjacent to the hub, a flywheel which rotates about an axis coincident to the hub axis, means for coupling the flywheel with the hub, means for urging the brake element against the mounting hub to impede rotation of the hub, and a brake anchor having a base that is mountable on the press frame and at least one pin that projects from the base and into the brake element so as to prevent the brake element from rotating when the brake element is urged against the hub, a jig for locating the brake anchor properly with respect to the spindle, said jig comprising:
A clutch-brake unit for a press including a frame having a boss provided with a flat surface, a crankshaft provided with a spindle at its end and a flange from which the spindle projects, the axis of the spindle being perpendicular to the plane of the flat surface on the boss, a ram connected to the crankshaft such that it reciprocates when the crankshaft rotates, and a motor, said clutch-brake unit comprising a mounting hub including an axial portion and a flange portion extended radially from the axial portion, the hub being mounted with the spindle received in the axial portion and the flange portion against the flange or the crankshaft such that the hub completely encloses the spindle, the flange portion having an annular chamber which is in communication with the interior of the axial portion;
Dependencies are inferred from the claim text.