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    • 29. 发明公开
    • Actuator with amplified stroke length
    • Aktuator mitverstärkterHublänge
    • EP1788645A1
    • 2007-05-23
    • EP06076997.3
    • 2006-11-09
    • Delphi Technologies, Inc.
    • Jensen, Eric LeeKruckemeyer, WIlliam C.
    • H01L41/04F02M51/06F02M59/46F02M61/16F16K31/00F02M63/00
    • F16K31/007F02M51/0603F02M61/167F02M63/0015F02M63/0026F02M2200/701F02M2200/703H02N2/043
    • An actuator (20, 120) having a housing (22) that defines an interior volume (24) and a primary driver (34) that includes either a piezoelectric element or a magnetorestrictive element. The primary driver (34) has first and second opposing ends (36, 38) and defines a longitudinal length (37) therebetween. The first end (36) of the primary driver (34) is bearingly engaged with a reaction surface (44) that is fixed relative to the housing (22). The second end (38) of the primary driver (34) longitudinally moves a bearing surface (64, 164) that partially defines a closed working chamber (66, 166) having a fixed quantity of an incompressible medium (68, 168). An actuating rod (70, 170) extends through an orifice (32) in the housing (22) and has a first end (72, 172) projecting outwardly and a second end (74, 174) disposed within the working chamber (66, 166). The cross sectional area (78) of the orifice is less than the effective area of the bearing surface (64, 164) whereby the travel distance of the rod (70, 170) is amplified relative to the change in length (37) of the primary driver (34).
    • 具有限定内部容积(24)的壳体(22)和包括压电元件或磁致伸缩元件的初级驱动器(34)的致动器(20,120)。 主驱动器(34)具有第一和第二相对端(36,38)并且在它们之间限定纵向长度(37)。 主驱动器(34)的第一端(36)与相对于壳体(22)固定的反作用表面(44)承载接合。 主驱动器(34)的第二端(38)纵向移动部分地限定具有固定量的不可压缩介质(68,168)的封闭工作室(66,166)的支承表面(64,164)。 致动杆(70,170)延伸穿过壳体(22)中的孔(32),并且具有向外突出的第一端(72,172)和设置在工作室(66)内的第二端(74,174) 166)。 孔口的横截面积(78)小于支承表面(64,164)的有效面积,由此杆件(70,170)的移动距离相对于长度(37)的变化被放大 主驾驶员(34)。