초록 ▼

A rotational control apparatus is shown according to the teachings of the present invention in its most preferred form as a brake. In the preferred embodiment, the apparatus includes an improved drive disc having an improved ventilated hub and an improved, ventilated friction disc slideably mounted

A rotational control apparatus is shown according to the teachings of the present invention in its most preferred form as a brake. In the preferred embodiment, the apparatus includes an improved drive disc having an improved ventilated hub and an improved, ventilated friction disc slideably mounted thereon. The hub includes a generally cylindrical portion having axially extending cooling air bores extending therethrough and axially extending fins extending from the opposite axial ends thereof. The friction disc includes first and second, identical, interchangeable component discs interconnected together by columns projecting from the inner surface of the component discs which abut together and form radially extending fins having circumferentially aligned air passageways formed therein. Thus, air can flow through the air entry ports formed adjacent the center of the component discs radially between the component discs and also circumferentially through the air passageways allowing a mixing and turbulence of cooling air increasing friction disc heat transfer and cooling. In the preferred embodiment, the apparatus further includes a plurality of circumferentially spaced fins which interconnect the piston and the friction lining pressure plate and also aid in cooling. The axially extending fins of the hub direct and force air through the hub cooling air bores and between the pressure plate and piston to allow increased apparatus heat transfer and cooling.

대표청구항 ▼

Drive disc comprising, in combination: a ventilated hub comprising, in combination: a generally cylindrical portion having a first end and a second end; axially extending air cooling bores extending through the cylindrical portion; axially extending fins extending from the second end of the cylindri

Drive disc comprising, in combination: a ventilated hub comprising, in combination: a generally cylindrical portion having a first end and a second end; axially extending air cooling bores extending through the cylindrical portion; axially extending fins extending from the second end of the cylindrical portion and located between and out of circumferential alignment with the axially extending air cooling bores, with the axially extending fins of the hub having a decreasing radial size and a decreasing axial thickness in a direction extending away from the cylindrical portion, with the axially extending air cooling bores having a decreasing radial size over its axial length from the second end of the cylindrical portion to the first end of the cylindrical portion; and axially extending shoulders extending from the second end of the cylindrical portion, with the axially extending bores and the axially extending fins being located between and out of circumferential alignment with the axially extending shoulders, and radially extending threaded bores formed in the axially extending shoulders for receiving set screws for abutting with a shaft to be connected to the hub; and animproved ventilated friction disc interconnected to the hub, with the friction disc comprising, in combination: a first individual component disc, a second, individual component disc, means for interconnecting the first and second component discs together to form the friction disc, heat radiating fins extending generally longitudinally between the internal surfaces of the component disc and internally of the friction disc, with the heat radiating fins extending radially from the hub in a circumferentially spaced relation throughout the circumference of the friction disc to thus divide the friction disc into wedge shaped areas, at least one cooling air entry port formed through the component disc adjacent the hub and located in the wedge shaped areas, with the heat radiating fins including at least three columns in a spaced relation forming fin openings therebetween to define an air cooling chamber internally of the friction disc, between the air entry port, through the fin openings of the heat radiating fins, and out of the periphery of the friction disc to allow passage of cooling air radially and also circumferentially inside the friction disc to allow increased heat transfer, cooling, and apparatus efficiency, with the fin openings being in circumferential alignment to form an obstruction free annular air path around the entire circumference of the friction disc.