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发明授权
US4359114A Raise drill bit inboard cutter assembly 失效
升高钻头内部切割器总成

Raise drill bit inboard cutter assembly
摘要：
A raise bit (10) is constructed with a plurality of housings (30) secured to cutter carrier frame (14) and disposed about drive stem (12). Housings (30) include a rectangularly-shaped mounting box (48) for rotatably supporting an outboard roller cutter (28). Each housing (30) also includes an upright wall (34) having an upwardly tapered lug (40) extending along the upper edge portion thereof for seating within a correspondingly shaped groove (82) formed along the underside of shoulder section (78) of an L-shaped hanger bracket (68). A roller shell (72) is antifrictionally mounted on a spindle (70) extending outwardly from an upright section (76) of hanger bracket (68). Bracket (68) is held in hooked relationship over lug (40) by a pair of capscrews (74) extending downwardly through clearance holes formed in upright section (76) and engaging within a lower portion of upright wall (34).
摘要（中）：

提升位（10）构造有多个固定到刀架架（14）的壳体（30），并围绕驱动杆（12）设置。 壳体（30）包括用于可旋转地支撑舷外滚轮切割器（28）的矩形安装盒（48）。 每个外壳（30）还包括一个直立的壁（34），其具有沿着其上边缘部分延伸的向上锥形的凸缘（40），用于位于形成在一个相应形状的凹槽（82）内，该凹槽沿着肩部（78）的下侧形成， L形吊架（68）。 辊壳（72）被防止地安装在从衣架支架（68）的直立部分（76）向外延伸的心轴（70）上。 支架（68）通过一对通过向下延伸通过形成在直立部分（76）中的间隙孔并且接合在直立壁（34）的下部中的向上延伸的钩帽螺栓（74）而以钩状关系保持。

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