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US 9,719,587 B2Granted
Hydraulic axle
AssigneeRobert Bosch GmbH
InventorsStefan Schmidt, Gottfried Hendrix
Life of this patent
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Abstract
A hydraulic axle includes a reversible hydraulic pump. The hydraulic axle has a multi-surface cylinder with two retraction surfaces and two deployment surfaces. A first deployment surface and a first retraction surface are configured to interconnect with each other and separate from other surface during a rapid-traverse stroke. A pressure medium is configured to act on the second deployment surface to enable deployment.
Claims17
A hydraulic axle, comprising:
- a reversible hydraulic machine;
- a multi-surface cylinder that includes a piston which has:
- a first and second retraction surfaces;
- and
- a first and second deployment surfaces;
- a hydraulic circuit that includes control valves configured to actuate the piston during a rapid-traverse stroke and during a power stroke, the control valves including:
- a first control valve configured to connect the second deployment surface to a first pressure side of the reversible hydraulic machine,
- a second control valve configured to connect the second retraction surface to a second pressure side of the reversible hydraulic machine,
- a third control valve configured to connect the first retraction surface to the second pressure side of the reversible hydraulic machine, and
- a fourth control valve configured to connect the first deployment surface to the first pressure side of the reversible hydraulic machine, the first control valve arranged fluidically in series with the fourth control valve to enable the fourth control valve to connect the first deployment surface to the first pressure side of the reversible hydraulic machine;
- and
- a hydraulic accumulator connected to each of the first and second pressure sides of the reversible hydraulic machine,
- wherein:
- during the rapid-traverse stroke, the first deployment surface and the first retraction surface are configured to interconnect in a substantially unpressurized fashion via the hydraulic circuit;
- and
- during a rapid-traverse deployment stroke, a pressure medium is configured to act on the second deployment surface.
13 more elements
Dependencies are inferred from the claim text.