| 摘要 |
A fluid set and spring released clutch according to the teachings of the present invention is shown as including a one-piece hub including a cylindrical portion having a first tapered hole portion for securement to a shaft and a second cylindrical hole portion for receiving a rotary air union. A radially extending flange portion terminating in an annular lip is formed on the cylindrical portion of the hub and forms an annular cavity for the reciprocal receipt of a piston. The clutch further includes a pulley rotatably received on the hub having a recess formed therein. An extension integrally attached to the piston extends into the recess of the pulley for providing friction engagement therebetween. The piston is mounted by bolts threadably secured into the extension and reciprocally received in the annular lip of the hub. The piston is biased into the cavity by springs located between the piston and the hub. The rotary air union is in fluid communication with the cavity behind the piston and includes a base portion which is received in the cylindrical hole portion of the hub. A carbon face seal is received within the base portion and includes a radial flange which fits into a radial recess formed in the base portion to prohibit any rotation of the carbon face seal relative to the hub. A coil spring is positioned against the end of the base portion and biases an O-ring into the dome-shaped end of the carbon face seal for forcing contact of the O-ring against the dome-shaped end of the carbon face seal and for forcing contact of the carbon face seal with a cylindrical mount rotatably received within the base portion of the rotary union. |
