Multi-Hole Core Drilling Machine

Abstract

A three-hole core drilling machine of the invention includes a body, a vertically reciprocating carriage vertically reciprocably mounted to the body, a fixing plate coupled to one side surface of the carriage, to rotatably support a drive shaft of a motor, a pivoting plate fastened to the fixing plate under a condition that a pivot angle of the pivoting plate is changed. a pair of moving plates movably mounted to opposite sides of the pivoting plate, a drive gear coupled to the drive shaft and a pair of driven gears coupled to a pair of driven shafts rotatably mounted to the pair of moving plates, a pair of moving gears mounted between the drive gear and the pair of driven gears, a first core bit coupled to the drive shaft, and a second core bit and a third core bit coupled to the pair of driven shafts.

Dependencies are inferred from the claim text.