Bicycle`s bottom bracket, has bearing surrounded by bearing cover, where contact area between bearing and outer ring is increased by inclined surface of outer ring and rollers of bearing

摘要

The bracket has a main body (1), which contains a bearing bush (11) for accommodating a bearing (12) inside the body. The bearing has rollers (121) at the peripheral side, where the rollers are inclinedly arranged. The bearing is surrounded by a bearing cover (13), which has an inclined inner surface (133) for the rollers. Contact area between the bearing and an outer ring is increased by an inclined surface of the outer ring and the rollers of the bearing.