Actuator
AssigneeRobert Bosch GmbH
InventorsMarco Beier, Andreas Rettich, Thomas Pauer, Mario Ricco
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Abstract
The invention relates to an actuator (1) comprising a housing (8), a coil (29) and an armature (2) which interacts with a tappet (30) and a spring, the armature plate (3) thereof being arranged to lie opposite an armature counterpiece (16), and said actuator (1) comprising at least one magnetostrictively-active component. According to the invention, an actuator (1) is provided with which large actuating paths can be travelled at high actuating forces. This is achieved by the actuator (1) additionally being designed to act as a solenoid.
Claims13
An actuator (1), having a housing (8), a coil (29), an armature (2) which interacts with a magnetostrictive tappet (30), and of which an armature plate (3) is arranged opposite an armature counterpiece (16), characterized in that the actuator (1) is additionally a solenoid and the magnetostrictive tappet and the solenoid share a magnetic circuit.
A method for operating an actuator, having a housing (8), a coil (29), an armature (2) which interacts with a tappet (30) and a spring and of which an armature plate (3) is arranged opposite an armature counterpiece (16),
- wherein the tappet is magnetostrictive, wherein, when current is applied to the coil (29), a magnetic flux forms across the armature (2), the tappet (30), a sliding piece (31) and the housing (8), the magnetostrictive tappet (30) being extended by said magnetic flux, and wherein, after a limit extension is reached, an attraction force between the armature plate (3) and the armature counterpiece (16) is large enough to move the armature (2), together with the tappet (30) and the sliding piece (31), to bear against the armature counterpiece (16) in the manner of a solenoid.
An actuator having a housing, a single coil, an armature which interacts with a magnetostrictive tappet, and a spring, and of which an armature plate is arranged opposite an armature counterpiece, and wherein the coil is configured to act on both the magnetostrictive tappet and the armature.
Dependencies are inferred from the claim text.