Flow medium-driven hand-held power tool

Abstract

A hand-held power tool, having a housing ( 12 ) and a tool ( 70 ), which is located on the housing so as to be capable of rotating and/or orbiting and which can be operated as intended by means of a suction air flow, in particular with a vacuum cleaner, is especially effective because a turbine ( 36 ) with a turbine wheel ( 38 ) serves as the drive mechanism and is provided with means for calming the inflowing and outflowing air, in particular with an upstream baffle ( 74 ) and/or a downstream baffle, and the turbine wheel ( 38 ) is sealed off by a labyrinth seal ( 51 ) from a turbine housing ( 60 ) that protects the turbine ( 36 ) against a pressure loss.

1 . A hand-held power tool, having a housing ( 12 ) and a tool ( 70 ), which is located on the housing so as to be capable of rotating and/or orbiting and which can be operated as intended by means of a suction air flow, in particular with a vacuum cleaner, characterized in that a turbine ( 36 ) with a turbine wheel ( 38 ) serves as the drive mechanism and is provided with means for calming the inflowing and outflowing air, in particular with an upstream baffle ( 74 ) and/or a downstream baffle, and the turbine wheel ( 38 ) is sealed off by a labyrinth seal ( 51 ) from a turbine housing ( 60 ) that protects the turbine ( 36 ) against a pressure loss. 
   
   
       2 . The hand-held power tool as recited in  claim 1 , characterized in that the upstream baffle ( 74 ) serves as a bearing seat ( 76 ) for a bearing ( 66 ) of the axial shaft ( 72 ). 
   
   
       3 . The hand-held power tool as recited in  claim 1 , characterized in that the upstream baffle ( 74 ), with an engagement region for a protrusion or into a protrusion of an axially adjacent part, in particular a mass compensator, forms a labyrinth seal. 
   
   
       4 . A hand-held power tool, having a housing ( 12 ) and a tool ( 70 ), which is located on the housing so as to be capable of rotating and/or orbiting and which can be operated as intended by means of a suction air flow, in particular with a vacuum cleaner, characterized in that a turbine ( 36 ) with a turbine wheel ( 38 ) serves as the drive mechanism and is provided with means for calming the inflowing and outflowing air, in particular with an upstream baffle ( 74 ) and/or a downstream baffle, and the turbine has a compensation mass ( 78 ), coupled to the axial shaft ( 72 ), that together with structures of an axially adjacent component, especially protrusions and recesses ( 80 ,  82 ) of the upstream baffle ( 74 ), forms a labyrinth seal ( 84 ). 
   
   
       5 . The hand-held power tool as recited in  claim 1 , characterized in that the upstream baffle ( 74 ) is built into the structure of the housing ( 12 ) in such a way that it reinforces the housing. 
   
   
       6 . The hand-held power tool as recited in  claim 1 , characterized in that the air for driving the turbine wheel ( 38 ) is brought to the turbine wheel radially outside of it and is then extracted by suction radially obliquely inward from the outer edge of the turbine wheel ( 38 ). 
   
   
       7 . The hand-held power tool as recited in  claim 1 , characterized in that it is designed as a surface sander, in particular as an orbital sander.