Clutch-brake unit for a press and method and jig for installing the same

Claim 3

The process according to claim 1 wherein the brake anchor has bolt holes; and the step of attaching the brake anchor to the frame comprises: using the bolt holes in the brake anchor to locate the positions of corresponding bolt holes in a mounting element attached to the boss while the brake anchor is attached to the jig and the jig is on the spindle, and making the corresponding bolt holes in said mounting element.

Claim 4

The process according to claim 1 wherein the shaft further has a flange at one end of the spindle, and the step of placing the jig over the spindle further includes moving the jig against the flange on the shaft, the jig further locating the brake anchor in the proper axial position with respect to the spindle.

Claim 5

The process according to claim 3 wherein the step of attaching the brake anchor to the frame further includes installing a mounting plate between the brake anchor and the flat surface of the frame so that the brake anchor remains in the same axial position as when attached to the jig.

Claim 6

The method according to claim 3 wherein the step of installing the mounting hub on the spindel includes passing screws through the hub parallel to the axis thereof and threading the screws into the flange on the shaft.

Claim 7

The method according to claim 3 wherein the portion of the jig which locates against the flange on the shaft has guide holes therein; and further comprising using the guide holes to locate the positions of holes into which the screws thread, and making the holes into which the screws thread.

Claim 8

The method according to claim 5 and further comprising installing the flywheel over the mounting hub after the hub is installed on the spindle such that the flywheel will rotate about the hub axis.

Claim 9

The process according to claim 5 wherein the mounting hub slides easily over the spindle and further comprising forming an air-tight seal between the end of the hub and the shaft.

Claim 10

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 first portion having an aperture which is sized to receive the spindle without permitting significant lateral motion; and a second portion connected rigidly to the first portion and configured to fit against the brake anchor such that the brake anchor is in a predetermined position with respect to the jig, whereby the brake anchor will be spaced a known distance from the axis of the spindle.

Claim 11

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 first portion having an aperture which is sized to receive the spindle without permitting significant lateral motion; and a second portion connected rigidly to the first portion and configured to fit against the brake anchor such that the brake anchor is in a predetermined position with respect to the jig, whereby the brake anchor will be spaced a known distance from the axis of the spindle.

Claim 12

The structure according to claim 9 and further comprising means for firmly securing the base of the brake anchor to the second portion of the jig.

Claim 13

The structure according to claim 10 wherein the means for securing the base of the brake anchor to the jig comprises a bolt and dowels.

Claim 14

The structure according to claim 11 wherein the bolt passes through a bolt hole in the second portion of the jig and threads into the brake anchor.

Claim 15

The structure according to claim 10 wherein the base of the brake anchor has a planar locating surface and the second portion of the jig has a planar surface against which the locating surface of the brake anchor is positioned when the brake anchor is attached firmly to the second portion of the jig.

Claim 16

The structure according to claim 13 wherein the planar locating surface on the brake anchor is located adjacent to a straight edge on the brake anchor, and the second portion of the jig has a shoulder which is located adjacent to the planar surface thereon, the straight edge of the brake anchor being against the shoulder of the jig when the brake anchor is secured firmly to the jig.

Claim 17

The structure according to claim 9 wherein the brake anchor has pins which engage the brake element of the hub; and wherein the pins are parallel to the axis of the spindle when the brake anchor is attached to the jig.

Claim 18

The structure according to claim 9 wherein the shaft has a flange at the end of the spindle, and the first portion of the jig has a planar back face which abuts the flange when the jig is properly located on the spindle whereby the jig also locates the brake anchor in a predetermined axial position with respect to the flange on the shaft.

Claim 19

The structure according to claim 16 wherein the first portion of the jig has guide holes around the bore therein, the guide holes being located opposite the flange of the spindle when the jig is against the flange so as to enable holes to be made in the flange for receiving machine screws which secure the mounting hub in place.

Claim 20

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; a seal between the hub and the spindle adjacent to the flange on the crankshaft; a rotating union connected to the axial portion, the rotating union being connected with a source of compressed air; an annular piston in the annular chamber of the flange portion on the mounting hub; a brake disk against the flange portion of the hub; a brake anchor including a base plate secured to the flat surface of the boss and at least one pin projected from the base plate parallel to the spindle axis, the pin being projected through the brake disk such that the brake disk can move toward and away from the flange portion of the hub; a pressure plate located opposite the brake disk and the piston; springs urging the pressure plate against the annular piston and brake disk so as to force the piston into the annular chamber and the brake disk against the flange portion whereby to impede the hub from rotating; a drive disk around the axial portion of the hub; machine screws extended through the drive disk and axial portion of the hub and being threaded into the flange on the crankshaft so that the hub and drive disk will rotate with the crankshaft; a transfer disk located between the pressure plate and the drive disk such that when the piston moves forwardly as a result of pressurized air being admitted to the annular chamber, the transfer disk will move against the drive disk; a flywheel mounted for rotation on the axial portion of the hub and being connected to and rotated by the motor; the flywheel further being connected to the transfer disk such that the rotation of the flywheel is imparted to the transfer disk, whereby when the piston is moved by pressurized air and the transfer disk is forced against the drive disk, the brake disk is released from the hub and the transfer disk is forced against the drive disk so that the rotation of the flywheel is likewise imparted to the hub and the crankshaft.

Claim 21

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; a seal between the hub and the spindle adjacent to the flange on the crankshaft; a rotating union connected to the axial portion, the rotating union being connected with a source of compressed air; an annular piston in the annular chamber of the flange portion on the mounting hub; a brake disk against the flange portion of the hub; a brake anchor including a base plate secured to the flat surface of the boss and at least one pin projected from the base plate parallel to the spindle axis, the pin being projected through the brake disk such that the brake disk can move toward and away from the flange portion of the hub; a pressure plate located opposite the brake disk and the piston; springs urging the pressure plate against the annular piston and brake disk so as to force the piston into the annular chamber and the brake disk against the flange portion whereby to impede the hub from rotating; a drive disk around the axial portion of the hub; machine screws extended through the drive disk and axial portion of the hub and being threaded into the flange on the crankshaft so that the hub and drive disk will rotate with the crankshaft; a transfer disk located between the pressure plate and the drive disk such that when the piston moves forwardly as a result of pressurized air being admitted to the annular chamber, the transfer disk will move against the drive disk; a flywheel mounted for rotation on the axial portion of the hub and being connected to and rotated by the motor; the flywheel further being connected to the transfer disk such that the rotation of the flywheel is imparted to the transfer disk, whereby when the piston is moved by pressurized air and the transfer disk is forced against the drive disk, the brake disk is released from the hub and the transfer disk is forced against the drive disk so that the rotation of the flywheel is likewise imparted to the hub and the crankshaft.

Claim 22

A clutch-brake unit according to claim 18 and further comprising a mounting plate through which the brake anchor is secured to the boss, the mounting plate overlying and being attached to the boss and the base plate being attached to the mounting plate.