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    • 75. 发明授权
    • ANTRIEBSEINHEIT FÜR EINEN KRAFTFAHRZEUGACHSSTABILISATOR
    • 驱动单元一个KRAFTFAHRZEUGACHSSTABILISATOR
    • EP1536960B1
    • 2006-04-12
    • EP03756437.4
    • 2003-09-12
    • ZF Lemförder Metallwaren AG
    • ERSOY, Metin
    • B60G21/055
    • B60G21/0555B60G2202/135B60G2202/413B60G2204/45
    • Disclosed is a drive unit for coaxial rotational movement of two halves (1), (2) of a motor vehicle stabilizer provided with a tubular housing consisting of two housing halves (3), (4), inside which a hydraulically displaceable actuating piston (13) is displaceably arranged. Longitudinal displacement by means of an inserted curve gear (17), (19) is transformed into a rotational movement of the housing halves (3), (4) around their common longitudinal axis. The housing halves (3), (4) are fixed to respectively one of the stabilizer halves (1), (2) with one respective free end thereof facing away from each other. According to the invention, hydraulically actuated release pistons (22), (23) are arranged on opposite flat sides of the actuating piston (13) and can be respectively pre-tensed against a spring element (28), (29). The release pistons (22), (23), when in a pre-tensed position, enable the central actuating piston (13) to be displaced and fix the actuating piston (13) in a middle position when they are in a slackened position. In said embodiment, the above-mentioned hydraulic drive unit is provided with a safety device which ensures in a simple, low-cost manner that the stabilizer is placed in a predefined neutral position in the event of failure of the hydraulic system or on-board electric system.