| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a piston motor capable of generating high output and high torque satisfactorily and provided with a distribution valve capable of increasing the number of cylinders. <P>SOLUTION: This piston motor 1 is provided with a cylinder block 3, a cam ring 3, a plurality of cylinders 4A, 4B, pistons 5A, 5B, and the distribution valve 23. The cam ring 31 rotates for the cylinder block 3 fixed in a non-rotation condition. The distribution valve 23 is provided with an oil passage branch member 11 and a change-over valve 41. The oil passage branch member 11 has oil supply ports 12a, 12b formed in the direction of rotary shaft by multiple of an annular oil supply port 11a and the cylinder and oil discharge ports 13a, 13b formed in the direction of rotary shaft by multiple of an annular oil discharge port 11b and the cylinder and is fixed to the cylinder block 3. The change-over valve 41 has a change-over valve oil supply port and a change-over valve oil discharge port formed in the direction of rotary shaft by multiple of cam number, is provided between the oil passage branch member 11 and the cylinder block 3 to rotate and slide freely and relatively, and operates in synchronization with the cam ring 31. <P>COPYRIGHT: (C)2004,JPO</p> |
