Drive device for an industrial truck

Abstract

A drive device for an industrial truck includes a pivoted bolster rotatable around a vertical axis (V), two drive wheels ( 4, 5 ) mounted on the pivoted bolster and a device located axially between the drive wheels ( 4, 5 ) to generate a differential action between the drive wheels ( 4, 5 ). A vertically oriented motor ( 6 ) can be provided above the drive wheels ( 4, 5 ) and a mechanical differential ( 7 ) can be coupled with the motor ( 6 ) and the drive wheels ( 4, 5 ). Alternatively, each drive wheel ( 4 or 5 ) can be coupled with its own motor ( 8 or 9 ). Alternatively still, a double rotor electric motor ( 10 ) having two rotors ( 10 c , 10 d) and a common stator ( 10 b) can be located between the drive wheels ( 4 or 5 ) and coupled with a neighboring drive wheel ( 4 or 5 ).

1 . A drive device for an industrial truck, comprising: 
 a pivoted bolster rotatable around a vertical axis;    two drive wheels mounted on the pivoted bolster parallel and in mirror symmetry with respect to the vertical axis; and    a device located axially between the drive wheels to generate a differential action between the drive wheels,    wherein each drive wheel is coupled with its own motor.    
     
     
         2 . The drive device as claimed in  claim 1 , wherein downstream of each motor is an integrated reducing gearset.  
     
     
         3 . The drive device as claimed in  claim 1 , including a brake integrated into each motor.  
     
     
         4 . The drive device as claimed in  claim 2 , including a brake integrated into each motor.  
     
     
         5 . The drive device as claimed in  claim 1 , wherein at least one motor is an electric motor.  
     
     
         6 . The drive device as claimed in  claim 5 , wherein at least one motor is a three-phase motor.  
     
     
         7 . The drive device as claimed in  claim 1 , wherein at least one motor is a wheel hub motor.