Hydraulic rotating equipment, and working machine provided with this hydraulic rotating equipment
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United States of America Patent
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Mar 13, 2018
Issued Date -
N/A
app pub date -
Dec 16, 2014
filing date -
Dec 16, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed is hydraulic rotating equipment provided with a rotating shaft, a cylinder block including a plurality of cylinders, a like plurality of pistons accommodated in the cylinders, respectively, and a valve plate maintained in slide contact with a rear end surface of the cylinder block. The valve plate includes a low-pressure port communicable with the cylinders, a high-pressure port formed in an arcuate shape over a predetermined angle along a circumferential direction of the rotating shaft and communicable with the cylinders, a seal land maintained in slide contact with the rear end surface, and a sliding contact member arranged on a periphery of the seal land in a range of the predetermined angle along the circumferential direction of the rotating shaft and maintained in slide contact with the rear end surface. A working machine provided with the hydraulic rotating equipment is also disclosed.
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