| 摘要 |
A bearing roller chain is provided to prevent leakage of lubricating oil by forming a sealing unit with a sealing and a ring-shaped metal sealing unit and to prevent shift of a bearing roller by installing a plurality of rollers and side wheel. A bearing roller chain comprises a bearing roller(6) and a sealing unit(9). The bearing roller has a roller(10) having an inward flange at two sides of an inner periphery, and a plurality of rollers(11) aligned between the roller and a bush to parallel to a center shaft of the bush. A side wheels(12) are installed at two sides of the bearing roller respectively and fitted from the inner periphery surface of the bush to be adhered to a side surface of the roller and an inner surface of an inner link plate(5). The sealing has a sealing(14) and a ring-shaped metal sealing member(15). The sealing has a ring-shaped lip unit which is adhered to an outer surface of the roller and made of resin or rubber. The metal sealing member is installed between the inner link plate and the side surface of the roller, and covers the sealing. The ring-shaped metal sealing member has a flange which is fitted to a ring-shaped groove. The ring-shaped groove is concentrically formed at the outer surface of the roller.
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