Bearing and method for manufacturing same

摘要

A bearing and a method for making the bearing incorporate annular elastomeric seals that are molded within annular edge grooves of an outer race so as to be bonded thereto while in slidable engagement with an outer spherical surface of a bearing element received within the race. The edge grooves of the race preferably have a relatively rough surface finish in relationship to the outer spherical surface of the bearing element so that there is good bonding of the seals to the race as well as good sealing thereof with the bearing element. Two preferred embodiments each incorporate a lining that is bonded to the outer race prior to a swaging operation which locates the race grooves adjacent the outer surface of the bearing element such that the seals are also bonded to annular edges of the lining during molding within the grooves. One of the lined embodiments has counterbores provided in the race so as to form its annular grooves, and the swaging operation provides the grooves with inwardly facing surfaces for maintaining the seals against outward movement in cooperation with the bonding. The other lined embodiment has outwardly facing chamfers forming its grooves. Two unlined embodiments also incorporate the annular seals molded within their associated race grooves, one of these embodiments having the counterbored grooves, and the other embodiment having chamfered grooves. Polyurethane elastomer is preferably used as the elastomeric material forming the seals and is also reacted as well as cured in the race grooves so as to provide good bonding and sealing.