| 摘要 |
The present invention relates to tools or bits for scraping ice and materials of similar properties of the type mounted on ice/snow removal vehicles. The tool for scraping ice and materials of similar properties comprises a shank (18) adapted to mount the tool in a carrier; and a cutting head (16) disposed at a lower end of the shank. The cutting head includes a rake face (24), a cutting edge (28) extending along a lower end of the rake face, and a clearance face (26) extending from the cutting edge in a direction extending away from the rake face and inclined upwardly toward the shank. The cutting head is formed by a main body (22) and a hard insert (30) mounted in the main body. The main body (22) includes a forwardly facing front surface and a bottom surface extending rearwardly therefrom. The insert (30) includes a forwardly facing front surface (31) oriented parallel to, and spaced from, the front surface of the main body. The insert further includes a bottom surface extending rearwardly from the front surface of the insert. The insert is formed of a harder material than that of the main body to be more wear resistant than the main body. The main body is wearable relative to the insert during an initial wear-in period of the tool, whereby the front and bottom surfaces of the main body initially form the rake face and clearance face, respectively, of the tool, and after the wear-in period the front and bottom surfaces of the insert form the rake face and the clearance face, respectively. <IMAGE> |
