Importance

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Abstract

A resilient shaft coupling that, to transmit torque, includes an annular intermediate member made of rubber disposed between an inner rigid coupling part and an outer rigid coupling part. The intermediate member has, on its outer periphery, pinion-like rubber teeth that mesh, with provision for axial movement, with companion inner teeth of the outer coupling part. The radially inner zone of the intermediate member is embodied as a member of uniform torsional strength. For radial support of the projecting portions of the outer zone, at least one closed metal ring is embedded in the rubber concentrically of the rotational axis near the radially inner interface of the zone and near each of the axial outer surfaces. The rings are preferably in the form of cables made from wire strands. To further increase the transmissible torque, the rubber of the outer zone is harder than the rubber of the inner zones. With this kind of arrangement of the metal rings, the endangered axially terminal annular zones are given effective radial support, so that in the axially central core zone of the intermediate member the rubber can still be urged outwardly by centrifugal force and, after overcoming the noraml clearance, can press the teeth firmly into the inner teeth of the outer coupling part.

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First Claim