| 摘要 |
<p>An air damper for a movably supported structural part, in particular in automobiles, comprising the following features: a hollow cylinder (12) closed at one end thereof a closure cap (14,14a) mounted on the other end of the cylinder a piston (16) slidably guided within the cylinder and having a rod (26) extending outwardly of the cylinder through the cap (14,14a) an annular recess at the circumference of the piston (16) an annular sealing ring (20) in the recess which sealingly engages the inner wall of the cylinder and the bottom of the recess, the axial extension of the sealing ring being smaller than that of the recess (18,18a) at least one axial groove in the bottom of the recess and at least one radial groove in the walls of the recess which communicate with the axial groove, with the cross section of the axial groove changing from one wall of the recess to the other wall, the damper defining an oscillating system, wherein the block-like sealing ring is made of a thermoplastic elastomer which cooperates with the wall of the cylinder and the bottom of the recess with a predetermined friction, the sealing ring being coated with a layer which has a static friction with the wall and the bottom of the recess which is approximately equal to the sliper of the parts, the friction portion of the damper being dimensioned such that it smoothens the oscillating system. <IMAGE></p> |
