Fitting links and chains

摘要

PROBLEM TO BE SOLVED: To provide a joint link and a chain capable of extending the life. SOLUTION: A joint link 21 has an inner link 13 in which both ends of a tubular bush 17 are press-fitted into a bush insertion hole 16 of a pair of inner link plates 12, and a pin insertion hole 20 of a pair of outer link plates 14. Two end link TLs located at both ends of a chain 11 in which both ends of a pin 19 are press-fitted into an outer link 15 and a pin 19 is inserted into a bush 17 so that the pin 19 can be alternately rotated in series. To concatenate. The joint link 21 holds a pair of joint link plates 22 having a joint hole 25, a bush 17 of an end link TL composed of an inner link 13, a joint pin 23 inserted into the joint hole 25, and lubricating oil. It is provided with an annular sintered bush 24 formed by an annular sintered body and interposed between the joint hole 25 and the joint pin 23. In the sintered bush 24, the joint pin 23 is loosely fitted while being press-fitted into the joint hole 25. [Selection diagram] Fig. 2