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    • 7. 发明公开
    • SERVOLENKUNG
    • EP2547924A1
    • 2013-01-23
    • EP11708786.6
    • 2011-03-09
    • ZF-Lenksysteme GmbH
    • FRÖHLICH, Stefan
    • F16C25/08F16C33/60B62D5/04F16C35/067
    • B62D5/0403B62D5/0448F16C25/08F16C27/04F16C33/60F16C35/067F16C2326/24
    • The invention relates to a power steering system (1), in particular an electrical power steering system for a vehicle, having a rotating component (5') driven by a servomotor (2) and having a rolling bearing (9) for axially and radially supporting the component (5') in the frame (4). In order to disclose a power steering system having minimized operating noise and friction, at least one inner race (10) or one outer race (11) of the rolling bearing (9) is divided into two race parts (13, 14) along a parting plane (12) extending approximately perpendicular to a longitudinal axis of the rotating component (5'), said race parts being axially spring-loaded against each other, wherein the end faces (15, 16) of the race parts (13, 14) facing each other are aligned to each other at an angle (ß) from the radially outer side (17) thereof to the radially inner side (18) thereof, and a component (19) having a conical cross section and a greater thermal expansion coefficient (α
      B ) than the thermal expansion coefficient (α
      A ) of the outer race (11) or inner race (10) is disposed between the end faces (15, 16), so that the race parts (13, 14) can be displaced axially toward each other by expansion of the component (19) when heat is introduced, and the race parts (13, 14) can be displaced axially away from each other when the component (19) cools off.
    • 本发明涉及一种动力转向系统(1),特别是用于车辆的电动动力转向系统,具有由伺服电机(2)驱动的旋转部件(5')并具有滚动轴承(9) 将构件(5')支撑在框架(4)中。 为了公开一种具有最小化操作噪音和摩擦的动力转向系统,滚动轴承(9)的至少一个内座圈(10)或一个外座圈(11)沿着一个轴向分成两个座圈部分(13,14) (12)大致垂直于所述旋转部件(5')的纵向轴线延伸,所述座圈部件相对于彼此轴向弹簧加载,其中所述座圈部件(13,14)的端面(15,16) )以从其径向外侧(17)到其径向内侧(18)的角度(β)彼此对准,并且具有锥形横截面和较大热膨胀的部件(19) 在端面(15,16)之间配置有比外圈(11)或内圈(10)的热膨胀系数(αA)大的系数(αB),使得座圈部(13,14)能够 在引入热量时通过部件(19)的膨胀而轴向朝向彼此移位,并且座圈部分(13,14)可以是b 当部件(19)冷却时轴向远离彼此移位。