Bearing device and fan apparatus

Abstract

In a bearing device equipped with a fastening element for rotatably supporting a drive shaft of a hand tool unit, the fastening element has a heat conducting structure for conveying heat from a bearing region of the fastening element into a ventilation region of said bearing element, and in a fan apparatus provided with a fan impeller for cooling a drive unit of a machine tool the fan impeller is provided to cool a heat conducting structure which conveys heat from a bearing region of the hand machine tool into a ventilation region of the same.

1 . A bearing device, comprising a fastening element for rotatably supporting a drive shaft of a hand tool unit, said fastening element having a bearing region and a ventilation region, said fastening element having heat conducting means for conveying heat from said bearing region of said fastening element into said ventilation region of said fastening element.  
   
   
       2 . A bearing device as defined in  claim 1 , wherein said heat conducting means are configured to permit air to circulate around said heat conducting means at least in said ventilation region.  
   
   
       3 . A bearing device as defined in  claim 1 , wherein said heat conducting means have at least one metallic subregion.  
   
   
       4 . A bearing device as defined in  claim 1 , wherein said at least one subregion of said heat conducting means has a symmetry axis which corresponds to a rotation axis of the drive shaft.  
   
   
       5 . A bearing device as defined in  claim 1 , wherein said heat conducting means have a cylindrical subregion.  
   
   
       6 . A bearing device as defined in  claim 1 , wherein said heat conducting means are configured to form a part of a labyrinth fan.  
   
   
       7 . A bearing device as defined in  claim 1;  and further comprising a housing, and at least one clamping element for clamping said fastening element to said housing.  
   
   
       8 . A bearing device as defined in  claim 7 , wherein said clamping element is configured to provide a tolerance compensation.  
   
   
       9 . A fan apparatus, comprising a fan impeller for cooling a drive unit of a hand machine tool having a bearing region and a ventilation region, said fan impeller being arranged to cool heat conducting means provided to convey heat from said bearing region into said ventilation region.  
   
   
       10 . A fan apparatus as defined in  claim 9 , wherein said fan impeller is provided with a labyrinth fan.