Patent ID: 7331701

Claim:
A mixing drum drive comprising a driving motor ( 5 ) for driving a mixing drum ( 1 ), a housing ( 11 ) supporting a drum bearing ( 12 ) which facilitates rotation of the mixing drum ( 1 ), and the mixing drum drive further comprising a compensating device ( 25 ) comprising: a first component ( 20 ) supported by a bearing bracket ( 4 ); a second component ( 16 ) supported by the housing ( 11 ); an elastic element ( 17 ) at least partially encased by the second component ( 16 ) and being located between the first component ( 20 ) and the second component ( 16 ); the first component ( 20 ), the second component ( 16 ), the elastic element ( 17 ) and the bearing bracket ( 4 ) all being located vertically below a rotational axis of the mixing drum ( 1 ) so that the elastic element ( 17 ) is normally compressed by a weight of the housing ( 11 ) and the mixing drum ( 1 ); and the elastic element ( 17 ) compensating for relative motion between the mixing drum ( 1 ) and the bearing bracket ( 4 ) during rotation of the mixing drum ( 1 ).