| 摘要 |
PROBLEM TO BE SOLVED: To provide a multi-stroke type radial piston motor for reducing manufacturing-assembling cost. SOLUTION: A cam motor 20 has a pushing-away mechanism part 29 including a plurality of radial directional piston cylinder units and a fixed valve plate 21 axially arranged in a pressure contact state to a cylinder block 28 of the pushing-away mechanism part and having a plurality of through-holes for successively supplying-delivering a hydraulic fluid to a piston of the pushing-away mechanism part via an oil hole. The cylinder block has a stepped oil groove 30 communicated with a bore of the cylinder block on a second wall positioned on the opposite side of a first wall contacting with the valve plate and contacting with a fixing part of the motor in a sliding state, and thus, a pressure chamber for receiving the high pressure hydraulic fluid is formed between the fixing part and the second wall. The pressure receiving area of a stepped bottom part is set so as to generate equivalent and opposite reaction of axial thrust pressing force of the valve plate to the cylinder block. COPYRIGHT: (C)2004,JPO&NCIPI
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