Drive unit for driving at least one wheel drive shaft, in particular of a wheelset axle

Abstract

The invention relates to a drive unit for driving at least one wheel drive shaft, in particular of a wheelset axle, in particular a cross-drive for use in rail vehicles with a driving engine and a transmission assembly coupled thereto; the output of the transmission assembly is formed by a hollow shaft which is coupled to the wheel drive shaft, in particular the wheelset axle, via an articulated coupling; with a braking system. The invention is defined by the following features: the braking system comprises two braking subsystems; a first braking subsystem and a second braking subsystem; the braking subsystems are embodied as disk brake systems, each comprising at least one brake disk; an attachment flange of the brake disk of a braking subsystem is embodied in integral fashion with the hollow shaft.

1 . A drive unit ( 1 ) for driving at least one wheel drive shaft ( 2 ), in particular of a wheelset axle ( 3 ), for use in rail vehicles, having a driving engine ( 5 ) and a transmission assembly ( 6 ) coupled thereto; the output of the transmission assembly ( 6 ) is formed by a hollow shaft ( 11 ) which is coupled to the wheel drive shaft ( 2 ), in particular the wheelset axle ( 3 ), via an articulated coupling ( 12 ); having a braking system ( 15 ); an attachment flange ( 19 . 2 ) for a braking subsystem ( 17 . 2 ) and the hollow shaft ( 11 ) are formed by one component; characterized by the following features: the braking system ( 15 ) comprises two braking subsystems—a first braking subsystem ( 17 . 1 ) and a second braking subsystem ( 17 . 2 ); the housing ( 20 ) of the transmission assembly ( 6 ) is embodied in an integral fashion; the hollow shaft ( 11 ) is supported by means of a bearing arrangement ( 29 ) in the housing ( 20 ); the external diameter of the bearing arrangement ( 20 ) is the same for embodiments with different external diameters of the hollow shaft ( 11 ).  
     
     
         2 . The drive unit ( 1 ) as claimed in  claim 1 , characterized in that the braking subsystems ( 17 . 1 ,  17 . 2 ) are embodied as disk brake systems ( 18 ), each comprising at least one brake disk ( 18 . 1 ,  18 . 2 ), and the attachment flange ( 19 . 2 ) of the brake disk ( 18 . 2 ) of the one braking subsystem ( 17 . 2 ) and the hollow shaft ( 11 ) being formed by one component.  
     
     
         3 . The drive unit ( 1 ) as claimed in  claim 1  or  2 , characterized by the following features: 
 the first braking subsystem ( 17 . 1 ) and the second braking subsystem ( 17 . 2 ) are arranged on the two sides of the transmission assembly ( 6 ), the second braking subsystem ( 17 . 2 ) being arranged, in the installation position, between the transmission assembly ( 6 ) and the articulated coupling ( 12 ); the attachment flange ( 19 . 1 ) of the first braking subsystem ( 17 . 1 ) being embodied as a separate component; having means ( 30 ) for attaching the first attachment flange ( 19 . 1 ) to the hollow shaft ( 11 ).  
 
     
     
         4 . The drive unit ( 1 ) as claimed in  claim 3 , characterized by the following features: the transmission assembly ( 6 ) has a housing ( 20 ), the activation device of the braking subsystems —the first braking subsystem ( 17 . 1 ) and the second braking subsystem ( 17 . 2 )—are arranged on the housing of the transmission assembly ( 20 ) and attached.  
     
     
         5 . The drive unit ( 1 ) as claimed in one of  claims 1  to  4 , characterized in that the hollow shaft ( 11 ) and the attachment flange ( 19 . 2 ) are embodied integrally as a cast part.  
     
     
         6 . The drive unit ( 1 ) as claimed in one of  claims 1  to  4 , characterized in that the hollow shaft ( 11 ) and the attachment flange ( 19 . 2 ) of the second braking system ( 17 . 2 ) are embodied integrally as a forged part.  
     
     
         7 . The drive unit ( 1 ) as claimed in one of  claims 1  to  6 , characterized by the following features: the articulated coupling ( 12 ) comprises a first coupling part ( 13 ) which is coupled to the hollow shaft ( 11 ) the first coupling part ( 13 ) is embodied integrally with hollow shaft ( 11 ).  
     
     
         8 . The drive unit ( 1 ) as claimed in  claim 1 , characterized in that both braking subsystems—first braking subsystem ( 17 . 1 ) and second braking subsystem ( 17 . 2 ) are arranged between the transmission assembly ( 6 ) and the articulated coupling ( 12 ), and the attachement flangs ( 19 . 1 ,  19 . 2 ) of the two braking subsystems ( 17 . 1 ,  17 . 2 ) are embodied integrally with the hollow shaft ( 11 ).