| 摘要 |
A rolling bearing is provided wherein at least one end of an opening of a bearing space formed between an outer race (11) and an inner race (12) is covered with a sealing ring (20) made of a resin; wherein the sealing ring (20) is provided with oil flow holes (22), and the oil flow holes (22) are provided with filters (23) configured to capture foreign substances contained in a lubricating oil. In this rolling bearing, the sealing ring (20) includes a plurality of engaging portions (21) provided on the radially inner surface of the sealing ring (20) in a protruding manner along the circumferential direction thereof, and the inner race (12) includes recesses (30) provided on the outer peripheral surface thereof and engaging with the engaging portions (21). An annular member (40) made of a material softer than that of the sealing ring (20) is fixed to the sealing ring (20), and the annular member (40) includes a lip portion (41) which faces the outer race (11) with a gap or comes into contact with the outer race (11). The sealing ring (20) is formed by injection molding, and weld lines (w) generated during the injection molding are formed in the portions of the sealing ring (20) corresponding to the radial directions along which the oil flow holes (22) are not disposed. By adopting the above mentioned constitutions, the present invention aims to prevent the deterioration of the sealing properties of the sealing ring provided with filters, and to elongate the service life of the sealing ring. |
