| 摘要 |
A flexible annular coupling made of composite (fibre reinforced plastic) material and comprising an even number of relatively thicker fixing portions (10) spaced apart circumferentially around the coupling for connection to two rotary members to be coupled by the coupling and a flexible leaf (11) extending lengthwise between each two adjacent fixing portions, each leaf comprising a relatively thinner central part (11a) and transition portions (13) of gradually increasing thickness between the ends of the central part and the thicker fixing portions, the coupling being so constructed that the central part (11a) of at least each circumferentially alternate leaf will always be displaced axially (i.e. in a direction parallel to the rotary axis of the coupling) in the same pre-determined direction (A) transverse to its length when the leaf is caused to buckle by compressive force(s) acting between the fixing portions at the ends of the leaf. The displacement may be obtained by curving the central part, by suitably shaping the transitional portions or by making the central part of two layers of different stiffness.
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