Hydraulic Oil Cylinder, Correlative Device Thereof, Hydraulic Cushion System, Excavator And Concrete Pump Truck
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United States of America Patent
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N/A
Issued Date -
Aug 15, 2013
app pub date -
Jun 21, 2011
filing date -
Jul 23, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A hydraulic oil cylinder has a cushion collar, which is sleeved in the cushion position of a piston rod and can axially slide along the piston rod. In the oil cylinder cavity between an oil hole of the rod cavity and the terminal position of the piston end surface of the rod cavity during the piston extending movement, a sealing end surface of the rod cavity is provided, which can block the cushion collar and contact with the first end surface of the cushion collar to form a sealing surface. At least a throttle oil channel is provided between the cushion collar and the piston rod.
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