Machine tool
AssigneeHoerbiger Automatisierungstechnik Holding GmbH
InventorsMartin Rauwolf, Bernhard Russ, Andreas Socher
Life of this patent
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Abstract
An electrohydraulic drive unit of a machine tool having a tool that can be moved up and down is provided and comprises a double-acting hydraulic cylinder-piston arrangement oriented in upright manner and having a piston projecting downwardly from the cylinder and being coupled with the tool, a valve block flanged to the cylinder at the upper end region thereof and having a servo suction valve, a hydraulic-fluid reservoir flanged to the valve block at a first hydraulic interface and a motor-pump unit having an electric motor and a hydraulic pump driven thereby and flanged to the valve block at a second hydraulic interface. A suction line, extends from the first hydraulic interface to the second hydraulic interface through the valve block.
Claims13
A machine tool having at least one tool that can be moved up and down substantially vertically, on which at least one electrohydraulic drive unit acts, comprising:
- a double-acting hydraulic cylinder-piston arrangement oriented in upright manner and having a piston projecting downwardly from the cylinder and being coupled with the tool,
- a hydraulic-fluid reservoir,
- a motor-pump unit having an electric motor and a hydraulic pump driven thereby, and
- a valve block flanged to the cylinder at an upper end region of the cylinder and having a servo suction valve,
- wherein the hydraulic-fluid reservoir is flanged to the valve block at a first hydraulic interface and the hydraulic pump is flanged to the valve block at a second hydraulic interface, wherein a suction line, via which the hydraulic pump sucks in hydraulic fluid from the hydraulic-fluid reservoir during pumping operation, extends from the first hydraulic interface to the second hydraulic interface through the valve block (15), wherein the suction line is identical in portions to a servo suction line passing through the valve block and placing the hydraulic-fluid reservoir in communication with a piston-side working chamber of the double-acting hydraulic cylinder-piston arrangement.
Dependencies are inferred from the claim text.