| 摘要 |
A heavy load bearing includes a casing (10) and an assembly (12) which has at least two units (16, 16', 16", 16a, 16b, 16c, 16d, 16e and 16f) and an axial hole (18) run through by a shaft. Each unit (16, 16', 16", 16a, 16b, 16c, 16d, 16e or 16f) has a mounting portion (20 or 20a) on the circumferential outer surface, two connection portions (22 and 23) at two ends, and an axle hole (25). Each unit (16, 16', 16", 16a, 16b, 16c, 16d, 16e or 16f) further has at least one groove (27 and 28) indented axially from the connection portion (22 and 23) and formed between an outer wall (29) near the mounting portion (20 or 20a) and an inner wall (30) near the axle hole (25). The unit (16, 16', 16", 16a, 16b, 16c, 16d, 16e or 16f) also has at least one set of multiple notches (35) formed annularly on a free end of the inner wall (30) and communicating with the groove (27 or 28) and axle hole (25). The casing (10) has an axial cavity (11) to hold the assembly (12). The two abutting units (16, 16', 16", 16a, 16b, 16c, 16d, 16e and 16f) are coupled to form at least one storage chamber (15, 15a, 15b and 15c) to store lubricating media. The notches (35) of the two abutting units (16, 16', 16", 16a, 16b, 16c, 16d, 16e and 16f) form at least one set of multiple fine flow passages (32 and 32a) communicating with the axial hole (18) and storage chamber (15, 15a, 15b and 15c). |
