Patent ID: 8608457
Filing Date: 2013-12-17
Classification: E06B,H02K

Abstract:
1. A device for driving a drum ( 1 ) about an axis thereof, comprising a motor ( 2 ) which is mounted at least partially inside the drum ( 1 ) and transmission means ( 7 ) provided between the motor ( 2 ) and the drum ( 1 ), whereby means ( 10 ) are provided enabling a forced current of cooling air to be created in a space ( 13 , 14 ) between the motor ( 2 ) and an inner wall of the drum ( 1 ), whereby the motor ( 2 ) is mounted on a frame ( 4 ) and at least partially inside a guide roller ( 3 ) for the air current, whereby the roller ( 3 ) extends at least partially about the motor ( 2 ) and makes it possible to guide the air current along an exterior wall ( 2 ′) of the motor, wherein the drum ( 1 ) is mounted in a sliding manner and co-axially on the guide roller ( 3 ) while being supported by the roller ( 3 ) in such a way that the drum ( 1 ) can undergo a rotation about its axis in relation to the roller ( 3 ), wherein the motor ( 2 ) drives an element ( 9 ) fixed to the inner wall of the drum ( 1 ) such as to make the drum ( 1 ) to rotate about its axis, wherein said element ( 9 ) can be at least partly deformed in an elastic manner so as to allow for a limited transversal movement of the motor ( 2 ) in relation to the axis of rotation of the drum ( 1 ).