Electrohydraulic booster
AssigneeHoerbiger Automatisierungstechnik Holding GmbH
InventorManfred Kurz
Life of this patent
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Abstract
An electrohydraulic booster comprises an electromechanical transducer and a hydromechanical power stage which is connected to a pressurized medium supply and encompasses a cylinder and a piston that can be moved therein along the working axis. The electromechanical transducer acts on a spool valve which is associated with the hydromechanical power stage, is disposed at least in part inside the piston, is guided within a guiding bore in such a way as to be movable along the working axis, and has two first leading edges that cooperate with corresponding second leading edges located on the guiding bore in order to form a hydraulic sequential control. The guiding bore consists of two parts, i.e. a cylinder-mounted first section and a second section which can be moved along the working axis and comprises the second leading edges.
Claims14
An electrohydraulic booster comprising an electromechanical transducer (2;
- 102) and a hydromechanical power stage (10;
- 110), which is connected to a pressurized-fluid supply (13;
- 113) and is provided with a cylinder (8;
- 108) and a piston (9;
- 109) that can be displaced therein along a working axis (5;
- 105), wherein the electromechanical transducer acts on a spool valve (23;
- 123), which is associated with the hydromechanical power stage, is disposed at least partly in the interior of the piston (9;
- 109) and is guided displaceably along the working axis in a guide bore, and which is provided with two first leading edges (38a, 38b;
- 138a, 138b) that cooperate with corresponding second leading edges (39a, 39b;
- 139a, 139b) provided on the guide bore to form a hydraulic sequential control, wherein the guide bore is constructed in two parts, with a first portion (25;
- 125) joined rigidly to the cylinder and a second portion (27;
- 127) whose position can be varied along the working axis (5;
- 105) and which is provided with the second leading edges (39a, 39b;
- 139a, 139b), wherein the first portion (25;
- 125) of the guide bore is constructed in a guide sleeve (29;
- 129) inserted in the cylinder (8;
- 108).
Dependencies are inferred from the claim text.