Piezo-actuator for use in window lifter drive of motor vehicle, has piezo-elements forming stack that is arranged in water-tight region of housing and axially pre-stressed in longitudinal axis with clamping element

摘要

The piezo-actuator (10) has a set of piezo-elements (16) for forming a stack (15), where the piezo-elements are arranged on each other. The stack is arranged in a water-tight region of a housing (11) and is axially pre-stressed in a longitudinal axis (21) with a clamping element. The clamping element is formed as a cap-shaped housing part (12) that is connected with a cup-shaped housing part (13) in a sealed manner by pre-stressing, where the housing parts define a region (14) for accommodating the stack.