Cylindrical journal bearing bush of elastic polyurethane - to tolerate up to 10 degrees angular misalignment

摘要

Pivot coupling for a lever or crank arm involves a cylindrical bush moulded from an elastic material which can tolerate slight (up to 10 deg.) mis-alignment between the moving rod and the pivot axis. Pref. the bush is made of an elastic polyurethane material, specifically 'UREFLEX' (RTM), as a relatively thick-walled bush supported by a coaxial pin traversing a journal bearing. Much simpler to mfr. assemble or replace than spherical couplings. No specific dimensions or material properties quoted.