RING BODY FOR SUPPRESSING PROPAGATION OF EARTH PRESSURE, ITS MOUNTING STRUCTURE, DISC CUTTER AND ROLLER DEVICE

摘要

PURPOSE: A ring body for suppressing the propagation of earth pressure, an installation structure thereof, a disc cutter, and a front wheel device are provided to suppress the propagation of earth pressure to a rotation sliding part arranged inside the ring body. CONSTITUTION: A ring body(10) for suppressing the propagation of earth pressure comprises a first ring part(12) and a second ring part(13). The first ring part is composed of an elastic body. The second ring part is fixed to the side surface of the first ring part, and is composed of rotatable metal. The surface roughness of the second ring part is more than 12.5S.