公开(公告)号：US06455983B2

公开(公告)日：2002-09-24

申请号：US09291555

申请日：1999-04-14

申请人： Norbert Dettmann ,  Gerhard Diefenbach ,  Franz-Josef Küppers ,  Christian Reichinger

发明人： Norbert Dettmann ,  Gerhard Diefenbach ,  Franz-Josef Küppers ,  Christian Reichinger

IPC分类号： H02N200

CPC分类号： H02N2/0055 ,  H01L41/0913 ,  H02N2/103

摘要： The invention relates to a motor having a cuboid piezoelectric element (1) which carries an actuating member (2) for transmitting a force in an actuating direction (x). In known motors the piezoelectric element (1) is restrained by four restraining elements which are disposed in the plane of vibration (x/y plane) and which exert a preloading force on the piezoelectric element (1) in a direction perpendicular to the actuating direction (x). However, this gives rise to a frictional force between the restraining elements and the piezoelectric element, which reduces the vibration quality and, as a consequence, the motor power. This is avoided by means of the invention, where the piezoelectric element (1) is restrained by means of restraining elements (20, 21, 22, 23) without preloading, i.e. with maximal slidability in the directions (y, z) perpendicular to the actuating direction (x). Preferably, such a motor is used in drive apparatuses, particularly for driving the read/write unit on a pivotable arm or on a translatable slide.

摘要翻译： 本发明涉及一种具有立方体压电元件（1）的电动机，其承载用于在致动方向（x）上传递力的致动构件（2）。 在已知的电动机中，压电元件（1）被设置在振动平面（x / y平面）中的四个限制元件约束，并且在垂直于致动方向的方向上在压电元件（1）上施加预加载力 （X）。 然而，这导致约束元件和压电元件之间的摩擦力，这降低了振动质量，结果是电动机功率。 这是通过本发明避免的，其中压电元件（1）通过约束元件（20,21,22,23）被约束而不预加载，即在垂直于该方向的方向（y，z）上具有最大滑动性 致动方向（x）。 优选地，这样的电动机用于驱动装置中，特别是用于在可枢转臂或可平移滑动件上驱动读/写单元。