| 摘要 |
<p>A piezoelectric actuator, e.g., for actuating a mechanical component, is proposed, in which a piezoelectric element (<HIL><PDAT>2</BOLD><PDAT>) for acting on an actuating element (<HIL><PDAT>9</BOLD><PDAT>) with a pulling or pushing force, and a compensating element (<HIL><PDAT>3; 20</BOLD><PDAT>) are provided, wherein the piezoelectric element (<HIL><PDAT>2</BOLD><PDAT>) and the compensating element (<HIL><PDAT>3; 20</BOLD><PDAT>) basically have the same temperature expansion coefficients. The compensating element (<HIL><PDAT>3; 20</BOLD><PDAT>) is mechanically coupled to the piezoelectric element (<HIL><PDAT>2</BOLD><PDAT>) in such a fashion that the temperature-induced expansions of the piezoelectric element (<HIL><PDAT>2</BOLD><PDAT>) and the compensating element (<HIL><PDAT>3; 20</BOLD><PDAT>) cancel each other out in the effective direction in such a fashion that the actuating element (<HIL><PDAT>9</BOLD><PDAT>) remains in its position. A heat transfer compound (<HIL><PDAT>12</BOLD><PDAT>) is located between the piezoelectric element (<HIL><PDAT>2; 21</BOLD><PDAT>) and the compensating element (<HIL><PDAT>3; 22</BOLD><PDAT>).</PTEXT></p> |
