Flexible Kupplung

摘要

1,205,644. Universal Joints. TURBOFLEX Ltd. 14 March, 1968 [15 March, 1967], No. 12267/67. Heading F2U. In a flexible coupling comprising resilient material link means 4 connected to two components at points lying on a pitch circle coaxial with said components, an outer retaining part 16, coaxially fast with one component and disposed within said pitch circle, circumferentially and axially overlaps a co-operating axially extending inner retaining part 17 fast with the other component, to prevent component radial misalignment in the event of unequal yield in, or failure of, the link means, and means are provided to take up emergency drive in the event of link means failure. The link means may comprise individual straight links or may form a frame, and may be connected to each component at two or more points. As shown, a double coupling comprises a spacer 1 connected to two shafts (not shown) by laminated metal square link frames 4. Each frame 4 has a square or round central opening and is connected at its corners by nuts and bolts 6, 7 alternately to radial flanges 3 of hubs 2 fast with the spacer and a shaft. Each outer retaining part 16 and each contacting crowned inner retaining part 17 are respectively formed as flanges of thin annuli 14, 15 secured to the hubs 2 by the bolts 7, the retaining parts 16, 17 respectively extending towards the hub to which they are secured. Rivets 22 holding the link laminations together pass freely through clearance bores 21 in the annuli 14, 15 and take up emergency drive in the event of link failure. The crowning of the inner retaining part 17 permits angular misalignment. The outer surface of the outer retaining part 16 centres the link frame 4 in the case of deformation of the latter. Large washers 221 beneath the nut 6 also provide emergency drive in the event of link failure by engaging holes 23 in the flanges 3, the washers being of non-ferrous material, e.g. brass or bronze, to prevent undesirable sparking. Each annulus 14 has an outer flange 24. The above constructions may also be applied to single couplings.