| 摘要 |
A seal chain is provided to prevent deterioration of strength of a bush by forming an inclined surface of the bush at the most outer periphery surface of the bush for thickening a cross section of the bush. A seal chain(1) comprises an outer link(4), an inner link(8), and a sealing device(9). The sealing device has an elastic ring(10), and a seal ring(11). The elastic ring is aligned on the same shaft of a pin. The steel seal ring is placed at an outer part of the elastic ring and adhered to a surface facing to an outer link plate. The seal ring has a ring-shaped inclined inner periphery surface, and a ring-shaped inclined outer periphery surface. The diameter of the inclined inner periphery surface is getting smaller toward the outer link plate. The diameter of the inclined outer periphery surface is getting bigger toward the outer link plate. The elastic ring is supported by a ring-shaped inclined surface and the ring-shaped inclined inner periphery surface of the seal ring. The ring-shaped inclined surface is nearly parallel to the ring-shaped inclined inner periphery surface which is formed at the most outer periphery of a bush(7). The push is protruded from an inner link plate(5).
|
