Elastic shaft coupling having non-identical rubber elements

F - Mech Eng,Light,Heat,Weapons – 16 – D

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F16D 3/74 (2006.01)

Patent

CA 2648584

The invention relates to an elastic shaft coupling (1) having a drive-side (2) and having an output-side mechanical interface (15), both interfaces (2, 15) being intended in each case for connecting the shaft coupling (1) to an adjacent machine element, wherein the shaft coupling (1) has at least two elastic rubber elements (4, 9) which are connected behind one another between the drive-side (2) and the output-side interfaces (15) and the axial material thickness (S1, S2) of which increases in each case at a growing radial spacing (R1, R2) from the centre axis (10) of the shaft coupling (1). The present invention is based on the object of reducing the amount of rubber of the shaft coupling with retention of its elastic properties. This is effected in that the respective rubber elements (4, 8) are of non-uniform configuration with regard to their torsional rigidity (C1, C2) and to be precise are so non-uniform that the torsional rigidity (C2) of one of the two rubber elements (8) is always at least one and a half times as great as the torsional rigidity (C1) of the other rubber element (4).

L'invention concerne un accouplement d'arbres élastique (1) comprenant une interface mécanique côté entraînement (2) et une interface mécanique côté sortie (15), les deux interfaces (2, 15) servant à raccorder l'accouplement d'arbres (1) à un élément de machine adjacent, l'accouplement d'arbres (1) présentant au moins deux corps en caoutchouc élastiques (4, 9) montés l'un derrière l'autre entre l'interface côté entraînement (2) et l'interface côté sortie (15), dont l'épaisseur de matériau axiale (S1, S2) augmente à chaque fois avec l'augmentation de la distance radiale (R1, R2) à l'axe médian (10) de l'accouplement d'arbres (1). La présente invention a pour objet de réduire la quantité de caoutchouc de l'accouplement d'arbres tout en conservant ses propriétés élastiques. Cet objet est réalisé en ce que les corps en caoutchouc respectifs (4, 8) sont réalisés différemment en termes de leur rigidité en torsion (c1, C2) et ce de manière tellement différente que la rigidité en torsion (C2) de l'un des deux corps en caoutchouc (8) soit au moins une fois et demie supérieure à la rigidité en torsion (C1) de l'autre corps en caoutchouc (4).

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