| 摘要 |
PROBLEM TO BE SOLVED: To provide a crawler not causing damage on a rubber projection by changing a shape of the rubber projection engaged with a sprocket even if soil-sand or the like is deposited on an inner peripheral surface of the crawler. SOLUTION: In the core metal-less crawler formed with the drive rubber projection on an inner peripheral surface with a constant pitch, the rubber projection is formed in an approximately triangular shape provided with a drive side inclination surface and a brake side inclination surface in side view, in both inclination surfaces, a step is formed in an inclination angle, in the inclination angle of a base bottom part side (lower stage), the inclination angle of a brake side surface is made large, and in the inclination angle of an apex part side (upper stage), the inclination angle of a drive side surface is made large. The core metal-less crawler 1, the rubber projection 2, the drive side surface 2a of the rubber projection, the lower stage 2a1 of the drive side surface, the upper stage 2a2 of the drive side surface, the brake side surface 2b of the drive projection, the lower stage 2b1 of the brake side surface, the upper stage 2b2 of the brake side surface, the inclination angle x1 of the lower stage of the drive side surface, the inclination angle x2 of the upper stage of the drive side surface, the inclination angle y1 of the lower stage of the brake side surface, and the inclination angle y2 of the upper stage of the brake side surface. COPYRIGHT: (C)2008,JPO&INPIT
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