Oscillating drive apparatus for working tool and working apparatus using the same

A working apparatus for turning a pipe comprising:

• a casing body;
• a vise for holding a pipe, said vise being provided at the forward end of said casing body;
• a motor provided inside said casing body;
• a speed reducing gear train provided inside said casing body;
• an oscillating arm for driving a working tool, said oscillating arm being provided on one side of said casing body so as to be oscillated by a final output shaft of said speed reducing gear train through an oscillating drive mechanism;
• a shaft provided on the distal end portion of said oscillating arm in such a manner as to extend parallel to the pipe held by said vise;
• and
• a wrench member attached to said shaft through a grip thereof.

A working apparatus for machining a pipe comprising:

• a casing body;
• a vise for holding a pipe, said vise being provided at the forward end of said casing body;
• a motor provided inside said casing body;
• a speed reducing gear train provided inside said casing body;
• an oscillating arm for driving a working tool, said oscillating arm being provided on one side of said casing body so as to be oscillated by a final output shaft of said speed reducing gear train through an oscillating drive mechanism;
• a shaft provided on the distal end portion of said oscillating arm in such a manner as to extend parallel to the pipe held by said vise;
• and
• a cutter member attached to said shaft.