PITCH BEARING HAVING REDUNDANCY GEAR TOOTH

摘要

The present invention relates to a pitch bearing to support the blade of a wind power generator to be pitched, comprising: an inner wheel (20) joined to an outer wheel (10) around a rolling element (15); and a gear-tooth-shaped unit (30) which is joined to the inner side of the inner wheel (20) around a friction reduction unit (42) and has a gear-tooth-shaped part (31) and a non-gear-tooth-shaped part (33). Therefore, the pitch bearing of a wind power generator is formed with gear teeth on a predetermined area to switch the position of one side of the gear teeth with the other side of the gear teeth when one side of the gear teeth is damaged without the use of heavy equipment, thereby reducing the maintenance cost.