| 摘要 |
PROBLEM TO BE SOLVED: To provide a long life chain capable of preventing leakage of lubricating oil and intrusion of dust and reducing abrasion between rollers and bushes with the rollers smoothly rolling, having small number of parts, and simple manufacturing load and disassembly and assembly operation load. SOLUTION: The long life chain 100 is provided with a pair of inner plates 110, a pair of bushes 120 press-fit to the inner plates 110, rollers 130 externally fit to the bushes 120, a pair of connecting pins 140 inserted in the bushes 130 and a pair of outer plates 150 for press-fitting pin holes 151 to both ends of the connecting pins 140 and connecting the inner plates 110. In the long life chain 100, lubricating oil is enclosed between the rollers 130 and the bush 120, rotation shafts 132 formed to protrude from the roller 130 to the inner plate 110 are respectively supported by roller bearing parts 113 formed by counter boring an inside surface of the inner plate 110 in an enlarged-diameter state coaxial with a bush press-in hole 111. COPYRIGHT: (C)2008,JPO&INPIT
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