unique - abdichtungsvorrichtung by oiled leadership for hydraulic shock absorbers

摘要

The device for sealing off a pressurised hydraulic shock absorber tube (1) in which there slides a piston (1) provided with an axial rod (8), comprises a plug (17), a seal (10), fastening means (19 to 22) and a cylindrical guide (18) whose central opening (18c) guides the axial movement of the rod (8). The guide has a guiding base part (18a) and an axial peripheral wall (18b) defining a circular housing for supporting and centering the seal and the plug. The base part has several perforations (24) distributed over a circular path at the bottom of an annular groove (23) made in its upper side. The plug (17) has a central opening (17a) whose diameter is greater than the diameter of the rod of the tube in order to define a radial clearance avoiding mechanical contact beween the plug and the rod during the operation of the shock absorber. The plug has a circular housing (17b) around its central opening in order to take part of the seal sandwiched between the plug and the guiding base part. IMAGE