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US 6,617,766 B1Granted
Piezoelectric actuator
AssigneeRobert Bosch GmbH
InventorsWolfgang Stoecklein, Friedrich Boecking
Life of this patent
Estimating the term…
Abstract
A piezoelectric actuator in which at least on piezoelectric element is present for subjected an actuating element to a tensile force or compressive force. In addition, stabilizing elements are mounted parallel to the piezoelectric element with a flexible intermediate layer located between the elements. The piezoelectric element and the stabilizing elements have a great length in the effective direction (Z axis) in proportion to their width transversely to the effective direction (X, Y direction).
Claims16
A piezoelectric actuator comprising a housing (10), in which at least one piezoelectric element (2;
- 21;
- 31;
- 41;
- 42) for subjecting an actuating element to a tensile force or compressive force is disposed and is guided longitudinally movably by means of a flexible intermediate layer (11), and
- stabilizing elements (9, 22), disposed parallel to this piezoelectric element (2;
- 21;
- 31;
- 41, 42), to prevent bending tensions in the piezoelectric element (2;
- 21;
- 31;
- 41;
- 42) said intermediate layer (11) being located between the piezoelectric element (2;
- 21;
- 31;
- 41;
- 42) and the stabilizing elements (9, 22),
- the ratio of the length of the piezoelectric element (2;
- 21;
- 31;
- 41;
- 42) and the stabilizing elements (9, 22) in the effective direction (Z axis) to the width transversely to the effective direction (X, Y direction) is from 5:1 to 50:1.
18 more elements
Dependencies are inferred from the claim text.