The invention discloses a portable
pipe four-shaft hole cutter. The portable
pipe four-shaft hole cutter comprises a
portal frame mechanism, a rotating mechanism, an extending mechanism, a lifting mechanism and a gun swing mechanism, and is characterized in that the lower end of the
portal frame mechanism is axially fixed on a
pipe to be
cut a hole; the rotating mechanism is fixed at the middle part of the
portal frame mechanism; the extending mechanism is slidingly connected to the lower part of the rotating mechanism; the lifting mechanism is mounted at the
tail end of one side of a horizontal moving mechanism; and the gun swing mechanism is fixedly connected to the lower end of the lifting mechanism. The portable pipe hole cutter has four joint
degrees of freedom through simple structural design, includes a rotating motion of a rotating main shaft, an extension motion of the extending mechanism, a lifting adjustment of the lifting mechanism and angle adjustment of a
cutting gun by the gun swing mechanism, satisfies such parameters as
cut hole shape requirements and groove angles through change adjustment of four
degrees of freedom, and has such advantages as light structure, low manufacturing cost, convenience for operation and easiness in field construction.