公开(公告)号：US4314615A

公开(公告)日：1982-02-09

申请号：US165844

申请日：1980-05-28

申请人： George Sodder, Jr. ,  Oliver E. Palmer

发明人： George Sodder, Jr. ,  Oliver E. Palmer

IPC分类号： E21B4/00 ,  E21B4/02 ,  E21B4/16 ,  E21B4/18

CPC分类号： E21B4/02 ,  E21B4/006 ,  E21B4/16 ,  E21B4/18

摘要： A self-propelled drilling head comprises a base section including gripper shoes mounted for extension and retraction to selectively grip the wall of a hole being drilled. A first actuator is provided for extending and retracting the gripper shoes. A drilling section is mounted on the base for reciprocation relative thereto. A second actuator is provided for urging the drilling section downwardly relative to the base section when the gripper shoes are extended. A cutter bit is mounted at a lower end of the drilling section. A third actuator is provided for rotating the cutter bit and comprises a first hydraulic motor having a first output shaft. A second hydraulic motor is spaced below and laterally offset from the first hydraulic motor and has a second output shaft extending parallel to the first output shaft. A driven gear is mounted at the end of each output shaft. A drive transmitting gear mechanism is meshingly engaged on opposite sides by the driven gears. A first conduit supplies pressurized hydraulic fluid to the first and second motors. A second conduit conducts hydraulic fluid from the first and second motors. A power transmitting mechanism operably connects the drive transmitting gear to the cutter bit to rotate the latter.

摘要翻译： 自推进钻头包括基部，其包括安装成用于伸出和缩回以选择性地夹持被钻孔的壁的夹持器的鞋。 提供第一致动器用于延伸和缩回夹爪。 钻孔部分安装在基座上以便相对于其移动。 第二致动器被设置用于当夹爪延伸时相对于基部向下推动钻孔部分。 刀头安装在钻孔部分的下端。 提供第三致动器用于旋转刀头并且包括具有第一输出轴的第一液压马达。 第二液压马达与第一液压马达隔开并横向偏移，并且具有平行于第一输出轴延伸的第二输出轴。 从动齿轮安装在每个输出轴的末端。 驱动传动齿轮机构通过从动齿轮在相对侧啮合。 第一导管向第一和第二马达供应加压液压流体。 第二导管从第一和第二马达传导液压流体。 动力传递机构将驱动传动齿轮可操作地连接到切割钻头以使其旋转。