| 摘要 |
A cutting bit for a bit assembly secured to a cutter head includes a cutting end, a shank extending along a bit axis, and a shoulder positioned between the cutting end and the shank. The shoulder includes an outer edge defining a perimeter, a shoulder end surface defining a shoulder plane, a first inclined surface and a second inclined surface. The first inclined surface is positioned between the outer edge and the shoulder end surface. The first inclined surface extends along the perimeter and is oriented at a first acute angle relative to the shoulder plane. The second inclined surface is positioned between the shoulder end surface and the first inclined surface. The second inclined surface is oriented at a second acute angle relative to the shoulder plane, and the second acute angle is smaller than the first acute angle. |
| 主权项 |
1. A bit assembly for a cutting drum, the bit assembly comprising:
a sleeve including shank portion, a flange positioned adjacent an end of the shank portion, and a bore extending through the flange and the shank portion, the flange including a flange end surface; and a bit including a cutting end, a shank, and a shoulder positioned between the cutting end and the shank, at least a portion of the shank positioned within the bore of the sleeve, the shank extending along a bit axis, the shoulder positioned adjacent the end surface of the flange and including an edge, a shoulder end surface defining a shoulder plane, a first inclined surface, and a second inclined surface, the edge extending along a perimeter of the shoulder, the first inclined surface positioned between the edge and the shoulder end surface, the first inclined surface extending along the perimeter and oriented at a first angle relative to the shoulder plane, the second surface positioned between the shoulder end surface and the first inclined surface, the second inclined surface oriented at a second angle relative to the shoulder plane, the first angle being larger than the second angle. |
