| 摘要 |
<p>This invention relates to a shock absorber of the type comprising a cylindrical outer casing open at one end and closed at the other end, the closed end having an axial port. Positioned in the outer casing and extending longitudinally thereof is an inner casing of smaller diameter than the outer casing to define a chamber therebetween, the inner casing having one end open and the other end closed and longitudinally spaced from the end of the outer casing. A bladder of resilient material encompasses the major portion of the length of the inner casing and the closed end of the bladder mounts a valve member which is axially aligned with an axial bore in the closed end of the inner casing and normally urged against the valve seat defined by the outer end of said axial bore. Adjustment means accessible from the exterior, through the axial port in the closed end of the outer casing is provided to determine the amount of movement of the valve means away from the valve seat defined at the outer end of the axial bore in the closed end of the inner casing. The bladder is mounted on an annular supporting member positioned between the outer and inner casing at the mouths thereof and a plug is provided to seal the mouth of the inner casing. A piston is slidably mounted in the inner casing and has an axially extending piston rod secured at one end thereto with the other end of the piston rod protruding through an axial bore in the plug and normally resiliently urged outwardly. The piston rod has valve controlled means to permit flow of fluid from the portion of the inner casing bore adjacent the closed end of such bore to the portion of the inner casing bore on the other side of the piston and to restrain flow in the opposite direction. In addition perforations are provided in the wall of the inner casing to permit flow of fluid from one side of the piston through the perforations to the other side of the piston.</p> |
