Axial piston machine

An axial piston machine comprising:

• a rotational shaft rotatably supported in a casing;
• a cylinder supported by said rotational shaft and having a plurality of cylinder bores formed to surround said rotational shaft, said plurality of cylinder bores being open at one of opposite axial ends of said cylinder;
• a valve plate supported in said casing, the other axial end of said cylinder being in movable contact with said valve plate;
• a plurality of pistons movably supported in said cylinder bores at their respective portions on the side of the other axial end of the cylinder;
• and
• a swashplate supported in said casing in a manner so as to be tilted with respect to said rotational shaft, a portion of each of said pistons on the side of the one axial end of the cylinder being in movable contact with said swashplate,
• wherein an axial tensile force is caused to act on said casing by transmitting a hydraulic pressure reaction which is received from said cylinder by said pistons to one of opposite axial ends of said casing from said pistons through said swashplate, and by transmitting a hydraulic pressure reaction which is received from said pistons by said cylinder to the other axial end of said casing from said cylinder through said valve plate, and
• wherein said axial tensile force acting on said casing is canceled by meshing a first helical gear provided on said rotational shaft with a second helical gear rotatably supported in said casing and transmitting a thrust force received from said second helical gear by said first helical gear to said casing through said rotational shaft.