| 摘要 |
[Problem] To provide a caterpillar track bush and a caterpillar link device that can maintain sealing capability stably for a long time and can be easily maintained for recovering sealing capability. [Solution] A caterpillar track bush comprises: a caterpillar track bush main body (31) which includes a large-radius cylindrical part (31a) that forms an intermediate part in an axial direction (O), and a small-radius cylindrical part (31b) that has a smaller radius than the large-radius cylindrical part (31a) and forms an end part in the axial direction (O); an elastic ring (32) which is attached around the outside of the small-radius cylindrical part (31b); a seal ring (33) which includes a seal contact end surface (37) formed on the outer end side, and is attached to the small-radius cylindrical part (31b) by way of the elastic ring (32); a reverse taper surface (36) and a mountain-shaped protrusion (35) for preventing the elastic ring (32) from moving outward in the axial direction (O) of the small-radius cylindrical part (31b); and a tongue-shaped protrusion (39) and a reverse taper surface (40) for preventing the seal ring (33) from moving outward in the axial direction (O) of the small-radius cylindrical part (31b). |
