Patent ID: 8641262

Claim:
A building material mixer having a mixer drum ( 5 ) which can be rotationally driven by a mixer drive ( 1 ), with the mixer drum ( 5 ) being rotatably supported by the mixerdrive ( 1 ) at a mixer frame part ( 3 , 4 ), in particular a traveling gear frame part ( 4 ), at one of its end face ends and with the mixer drive ( 1 ) having a drive part ( 6 ), in particular a hydraulic motor ( 9 ), and a drive transmission ( 7 ) connected to the mixer drum ( 5 ), wherein the mixer drive ( 1 ) is encompassed and movably supported by movable bearing means ( 20 ) at the mixer frame part ( 3 , 4 ) allowing tilting movements, the mixer drum ( 5 ) is fastened to a transmission housing ( 11 ) of the drive transmission ( 7 ), the bearing means ( 20 ) have a plurality of ring-shaped elastic bearing members ( 21 ) of different diameters positioned, one within the other, in coaxial alignment about an axis of the mixer drive ( 1 ), by which the mixer drive ( 1 ) is fastened to the mixer frame part ( 3 , 4 ), the elastic bearing members ( 21 ) are positioned such that they are always only stressed on pressure and/or shear and installed under a sufficiently strong bias which prevents the occurrence of tensile strains in the elastic bearing members ( 21 ), the bearing means ( 20 ) additionally have a bearing ring ( 22 ) in which a preferably cylindrical and/or annular inner bearing part ( 23 ) is/are seated and fastened to or formed with the mixer drive ( 1 ), with said elastic bearing members ( 21 ) being arranged between the bearing ring ( 22 ) and the inner bearing part ( 23 ), with the bearing ring ( 22 ) and the inner bearing part ( 23 ) being held movably with respect to one another by said elastic bearing members ( 21 ), the bearing ring ( 22 ) surrounds a housing part ( 17 ) which encompasses the drive part ( 6 ) of the mixer drive ( 1 ) and at which the inner bearing part ( 23 ) is fastened or formed, with the bearing ring ( 22 ) being rigidly fastened to the mixer frame part ( 3 , 4 ), and said elastic bearing members ( 21 ) being tiltable in a direction parallel to the axis of the mixer drive ( 1 ).