| 摘要 |
<p>This improved cartridge-type pivotal pin and bushing joint comprises a cylindrical pin having a large, hollow metal cylinder concentrically disposed thereon intermediate the extremities thereof and a plurality of preloaded, spaced, dry, self-lubricated cylindrical bushings between the pin and cylinder at least adjacent the extremities of the cylinder. Dry, self-lubricated annular thrust bearings are concentrically mounted on the pin adjacent the extremities of the cylinder and thrust-controlling annular retainers are immovably press-fitted on the pin axially exterior to and abutting the thrust bearings so as to compressibly preload the same. The retainers have rounded or chamfered edges to facilitate press-fitting and seal-receiving annular grooves radially outwardly of the outer radial extremity of the thrust bearings, the open end of each of the grooves being disposed towards the end of the cylinder. Resilient seals are disposed in the grooves to sealingly engaged end portions of the cylinder. The self-lubricated cylindrical bushings may be metal-backed and the retainers may be manufactured with wall portions forming a primary seal.</p> |
