Patent ID: 8075218

Claim:
A shaft/hub connection ( 20 ) for transmitting torque, comprising the following components having a common longitudinal axis (X-X): a shaft ( 22 ), which can be rotated about the longitudinal axis (X-X), the shaft comprising an entraining longitudinal section having a polygonal or trochoidal outer contour ( 26 ); a hub ( 24 ), which is coaxial to the shaft ( 22 ) and which encloses the shaft ( 22 ) with a longitudinally extending end recess having a corresponding polygonal or trochoidal inner contour ( 28 ) at least in the area of the entraining longitudinal section; and a connecting means that prestresses the shaft ( 22 ) and the hub ( 24 ) when in a joined state, towards the longitudinal axis (X-X); wherein the outer contour ( 26 ) of the entraining longitudinal section of the shaft ( 22 ) and the inner contour ( 28 ) of the hub ( 24 ) have the shape of a perfect cone to such an extent that, when the shaft ( 22 ) and the hub ( 24 ) are joined, the shaft and the hub automatically frictionally self-lock, thereby holding the shaft/hub connection ( 20 ) together; wherein the connecting means is formed by a prestressing ring ( 34 ), which encompasses ramps ( 30 ), which are respectively disposed on an outer side of the shaft ( 22 ) adjacent the entraining longitudinal section and on an outer side of the hub ( 24 ) adjacent the recess, and which revolves around the longitudinal axis (X-X) and thus holds the shaft/hub connection ( 20 ) under prestress; wherein the prestressing ring ( 34 ) has a circumferential sidewall ( 38 ) and a plurality of circumferentially spaced side wall sections ( 40 ) that clampingly engage the ramps and deform elastically at the ramps ( 30 ) of the outer side of the shaft ( 22 ) and the outer side of the hub ( 24 ) when the prestressing ring is secured to the shaft and hub; and wherein the axial length of the entraining longitudinal section is up to 40% of the average cone diameter of the cross section of the polygonal or trochoidal entraining longitudinal section.