Plate element, and friction clutch device and brake device provided with the plate element

摘要

A friction clutch device includes clutch plates which are retained through meshing engagement on the inner peripheral surface of an outer case, which is rotatably driven by an engine. Each clutch plate includes a flat, annular pressing element which is pressed against a clutch friction plate for frictional contact therewith. Engagement protrusions are formed on the outer peripheral surface of the pressing element. The engagement protrusions fit into recessed engagement grooves provided on the outer case and mesh with the outer case. Proiectinq portions which project toward the inner peripheral surface of the outer case are formed on the outer peripheral surface of the pressing element.

主权项

1. A flat, annular plate element which is supported through meshing engagement with a concave holder-side engagement portion formed on an inner peripheral surface of a tubular holder, and which is pressed against or separated from a flat, annular counterpart element while being rotated relative to the counterpart element, the plate element comprising:
a flat, annular pressing element having an annular pressing portion which is pressed against the counterpart element for frictional contact therewith; a convex plate-side engagement portion which is provided on an outer peripheral surface of the pressing element facing the holder-side engagement portion of the holder and which is in meshing engagement with the holder-side engagement portion; and a projecting portion integrally formed on an outer peripheral surface of the plate-side engagement portion radially opposing the inner peripheral surface of the holder.