公开(公告)号：US20180038165A1

公开(公告)日：2018-02-08

申请号：US15554040

申请日：2016-02-26

申请人： Jae-Mun PARK

发明人： Jae-Mun PARK

IPC分类号： E21B7/02

CPC分类号： E21B7/024 ,  E02F3/3604 ,  E02F5/20 ,  E02F5/30 ,  E02F9/261 ,  E21B7/028 ,  E21B10/02 ,  E21B25/00

摘要： The present invention relates to a core drill apparatus which is mounted to a working boom of an excavator so as to drill rock or a concrete structure and, more particularly, to a core drill apparatus for installation in an excavator, which comprises a ring gear and a plurality of elevation cylinders that are connected to and installed in a working support frame mounted to the end of a working boom of an excavator so as to rotate the working support frame, and at the same time, is configured to support the working frame while adjusting the height of the slope using the elevation cylinders when the working frame is supported on an inclined work surface. Therefore, the present invention enables a drilling bit provided in the working support frame to stably drill a structure regardless of the inclination of a work surface to be drilled, and can thus significantly improve the efficiency of a drilling operation.