Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1976-10-29
1978-02-07
Larson, Lowell A.
Metal working
Method of mechanical manufacture
Assembling or joining
29701, 192 18A, P23Q 300
Patent
active
040719405
ABSTRACT:
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.
REFERENCES:
patent: 2472452 (1949-06-01), Wissman
patent: 2505600 (1950-04-01), Wissman
patent: 3535777 (1970-10-01), Felts
Hazelton Products, Inc.
Larson Lowell A.
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