公开(公告)号：EP2060834A1

公开(公告)日：2009-05-20

申请号：EP07806645.3

申请日：2007-09-04

申请人： Kyb Corporation ,  Arai Seisakusho Co., Ltd

发明人： HORIBA, Kazuyoshi ,  YONEZAWA, Kazuhiko ,  SUMIMOTO, Shinichi ,  MIYAZAWA, Seiji

IPC分类号： F16J15/32

CPC分类号： F16J15/3216 ,  F16J15/322 ,  F16J15/56

摘要： PROBLEMS
An oil seal for reciprocation motion is provided that can achieve high performance with certainty by preventing an inner peripheral surface of a backup ring from coming into contact with a reciprocating shaft over its entire surface.
MEANS FOR SOLVING PROBLEMS
An oil seal 1 for reciprocation motion includes a seal main body 6, a resin backup ring 4, and a holding member 22. The seal main body 6 includes a seal lip 7 that can be in sliding contact with a reciprocating shaft 8. The backup ring 4 is disposed such as to support the seal lip 7 from an atmosphere side to ensure durability of the seal lip 7. In the backup ring 4, at least a single annular groove 21 is provided on an inner peripheral surface 20 opposing the reciprocating shaft 8. The annular groove 21 can hold a lubricating material. The holding member 22 holds the backup ring 4 between the holding member 22 and the seal main body 6 in a sandwiched-state. The inner peripheral surface 20 of the backup ring 4 forms a taper that increases in diameter from a sealed side OS towards an atmosphere side AS in an axial direction.

摘要翻译： 发明内容提供一种用于往复运动的油封，通过防止支撑环的内周面在其整个表面上与往复轴接触而能够确定地实现高性能。 解决问题的手段用于往复运动的油封1包括密封主体6，树脂支撑环4和保持构件22.密封主体6包括密封唇7，密封唇7可以与往复运动轴 支撑环4被设置成从大气侧支撑密封唇7，以确保密封唇7的耐久性。在支承环4中，至少一个环形槽21设置在内周面20上 与往复轴8相对。环形槽21可以容纳润滑材料。 保持构件22在夹持状态下将支承环4保持在保持构件22和密封主体6之间。 支撑环4的内周面20形成从密封侧OS向轴向大气侧AS直径增大的锥形。