| 摘要 |
The chain comprises a plurality of external links ( 2 ), each defined by a pair of parallel external plates ( 4, 5 ) and by two rotation pivots ( 6 ) interpositioned between the two external plates ( 4, 5 ). The chain also comprises a plurality of internal links ( 3 ), each defined by a pair of parallel internal plates ( 7, 8 ) and by two bushes ( 9 ) interpositioned between the plates and each internal link ( 3 ). Each of the rotation pivots ( 6 ) is inserted coaxially in a bush ( 9 ) and so defines an alternated succession of external links ( 2 ) and internal links ( 3 ) and defines with the bush ( 9 ) a spherical coupling surface. The chain also comprises anti-rotation elements ( 12 ) for reducing a possibility of rotation with respect to an alignment direction of each pair of adjacent links ( 2, 3 ).
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