Piston and piston-rod guide unit for hydraulic shock absorbers
    1.
    发明公开
    Piston and piston-rod guide unit for hydraulic shock absorbers 失效
    Kolben und Kolbenstange-FührungseinheitfürhydraulischeDämpfer

    公开(公告)号:EP0713028A1

    公开(公告)日:1996-05-22

    申请号:EP95500156.5

    申请日:1995-11-14

    申请人: SINTERMETAL, S.A.

    IPC分类号: F16F9/32 F16F9/36 F16C33/20

    摘要: Piston (1) and piston-rod guide (2) unit for hydraulic shock absorbers, the guide comprising an annular piece (3) provided with a central orifice (5) and an elastic seal ring (4). The piston (1) is made up of a single piece (7) formed by a convexly curved generatrix revolution body (8). The external surface of the piston and the internal wall of the central orifice (5) of the annular piece (3) are provided, at least partially, with respective coatings (6, 9) of uniform thickness, of a material which reduces friction and improves wear resistance, such as polytetrafluoroethylene (PTFE) with a charge of ceramic particles and a pigment. The said charge of ceramic particles and of pigment preferably includes mullite and titanium oxide. The aforesaid coatings (6, 9) of the wall of the central orifice (5) of the annular piece (3) and the external surface of the piston (1) have a uniform thickness of between 20 and 60 micrometres.

    摘要翻译: 用于液压减震器的活塞(1)和活塞杆引导件(2)单元,所述引导件包括设置有中心孔(5)和弹性密封环(4)的环形件(3)。 活塞(1)由凸曲线母线旋转体(8)形成的单件(7)构成。 活塞的外表面和环形件(3)的中心孔(5)的内壁至少部分地设置有均匀厚度的相应涂层(6,9),该涂层减少了摩擦和 提高耐磨性,例如具有陶瓷颗粒和颜料的聚四氟乙烯(PTFE)。 陶瓷颗粒和颜料的所述电荷优选包括莫来石和氧化钛。 环形件(3)的中心孔(5)的壁和活塞(1)的外表面的上述涂层(6,9)具有20至60微米的均匀厚度。