Hydraulic shock absorber with nonlinear properties

摘要

A novel hydraulic, fluid-filled shock absorber including a shock absorber chamber bounded by cylindrical walls and opposed, spaced- apart first and second end plates including first means for anchoring the chamber to a frame, a shock absorber shaft passing axially through the chamber and end plates including second means for connection to a separate oscillatory member, a work disc pivotally mounted transverse to the shaft inside the chamber intermediate the first and second end plates, a baffle fixedly mounted inside the chamber in fluid-sealing relationship therein having at least one aperture formed therethrough, a wiper baffle axially mounted to the shaft intermediate the disc and the first end plate extending outward into fluid-sealing relationship against the chamber walls to effectively divide the chamber into first and second subchambers so that rotation of the shaft forces fluid from one subchamber through the aperture into the other subchamber, a first pivot pin extending inward from the second end plate through a circumferential slot formed in the work disc, a second pivot pin extending inward from the work disc spaced-apart from the first pivot pin, a lug pivotally received on the first pivot pin and slidingly received on the second pivot pin having an arm extending outward around the inside of the chamber to a distal end adjacent the chamber walls when the wiper baffle is in a first position apart from the fixed baffle and the first pivot pin is at one end of the slot and a moveable link attaching the distal end of the lug to the wiper baffle for moving the baffle through the fluid causing the lug to pivot about the first pin and rotate the disc about the chamber walls to provide variable fluid flow from one subchamber to the other subchamber as a function of shaft rotation.