| 摘要 |
PROBLEM TO BE SOLVED: To provide a blade device for a work machine, which exhibits drastic improvement in excavation efficiency compared with a conventional blade, and prevents earth from dropping at the time of rotation and push-turning during transportation of the earth, and to provide a work vehicle having the blade device mounted thereon. SOLUTION: The blade device has a total blade width W, and is formed of a central front surface portion (12), linkage front surface portions (13), and end front surface portions (14). The central front surface portion (12) has a linear first cutting edge (15) attached to a lower edge thereof, and has a predetermined blade width W1. Each linkage front surface portion (13) has a second cutting edge (16) which is extended from the first cutting edge (15) and bent rearward from the same by a predetermined angleδ. Each end front surface portion (14) has a third cutting edge (17) which is extended from the second cutting edge (16) and bent with respect to an extension of the first cutting edge (15), by an angleθ. Further the cutting edges (15 to 17) extend from the lower edges of the front surface portions (12 to 14), respectively, in a tangent direction, and provided that a cutting edge angleαof the cutting edges (15 to 17) is in an excavation position ranging from 40 to 55°, and that a height from the tip of the first cutting edge (15) to an upper edge of an earth retaining plate is represented by H, a radius R2 satisfies the following equation (I): R2=(0.7 to 1.0)×H. COPYRIGHT: (C)2007,JPO&INPIT
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