Vacuum Cleaning Tool, Especially Hand-Held Nozzle, for a Vacuum Cleaner

Abstract

A vacuum cleaning tool has a housing with a working chamber and a connecting socket for a vacuum hose. A brush roller is arranged in the working chamber. An air turbine is arranged in a turbine chamber between working chamber and connecting socket. The working chamber has a bottom with vacuum air ports through which a vacuum air flow enters the working chamber. The housing has an opening between working chamber and turbine chamber and a discharge opening between turbine chamber and connecting socket. The vacuum air flow passes from the working chamber into the turbine chamber and drives the air turbine and then passes through the discharge opening into the connecting socket. The brush roller acts through the vacuum air ports on a surface to be treated. A bushing on which the air turbine is fixedly mounted is rotatably supported on a support shaft mounted in the housing.

1 . A vacuum cleaning tool for a vacuum cleaning device, the vacuum cleaning tool comprising: 
 a housing having a working chamber at a first end and a connecting socket, adapted to receive a vacuum hose, at a second, opposed end;    a brush roller arranged in the working chamber;    wherein the housing has a turbine chamber arranged between the working chamber and the connecting socket;    an air turbine arranged in the turbine chamber;    wherein the working chamber extends transversely to a longitudinal axis of the vacuum cleaning tool;    wherein the working chamber has a bottom provided with at least one vacuum air port through which a vacuum air flow enters the working chamber;    wherein the housing has a connecting opening between the working chamber and the turbine chamber and a discharge opening between the turbine chamber and the connecting socket, wherein the vacuum air flow passes from the working chamber into the turbine chamber and drives the air turbine, wherein the vacuum air flow passes from the turbine chamber through the discharge opening into the connecting socket;    wherein bristles of the brush roller act through the at least one vacuum air port on a surface to be treated;    wherein the air turbine has a base member;    a support shaft mounted in the housing;    a bushing on which the base member of the air turbine is fixedly mounted, wherein the bushing is rotatably supported on the support shaft.    
   
   
       2 . The vacuum cleaning tool according to  claim 1 , further comprising at least one bearing mounted in the housing, wherein the support shaft has at least one axial end supported in the at least one bearing.  
   
   
       3 . The vacuum cleaning tool according to  claim 1 , wherein the support shaft is fixedly secured in the housing.  
   
   
       4 . The vacuum cleaning tool according to  claim 1 , wherein the bushing projects from the base member of the air turbine.  
   
   
       5 . The vacuum cleaning tool according to  claim 4 , further comprising a belt drive having a drive wheel and a belt pulley, wherein the drive wheel is arranged on one end of the bushing and wherein the belt pulley is fixedly connected to the brush roller and is driven by the belt drive by a driving belt guided about the drive wheel and the belt pulley.  
   
   
       6 . The vacuum cleaning tool according to  claim 5 , wherein the drive wheel is fixedly secured on the bushing of the air turbine.  
   
   
       7 . The vacuum cleaning tool according to  claim 1 , wherein the housing comprises a turbine channel that projects into the turbine chamber, wherein the air turbine is positioned, when viewed in an axial direction of the air turbine, with a radial length that is a portion of a diameter of the air turbine partially in the turbine channel.  
   
   
       8 . The vacuum cleaning tool according to  claim 7 , wherein the part of the diameter is more than a radius of the air turbine.  
   
   
       9 . The vacuum cleaning tool according to  claim 7 , wherein the turbine channel ends in the turbine chamber at a spacing from the discharge opening.  
   
   
       10 . The vacuum cleaning tool according to  claim 7 , wherein the turbine channel has lateral walls and wherein the bushing extends through the lateral walls of the turbine channel.  
   
   
       11 . The vacuum cleaning tool according to  claim 7 , wherein a width of the connecting opening matches approximately a width of the turbine channel.  
   
   
       12 . The vacuum cleaning tool according to  claim 1 , wherein the connecting socket has a stepped inner diameter and has a first section and a second section, wherein the first section is located adjacent to an open end opposite the discharge opening and has a first inner diameter, wherein the second section is located adjacent to the turbine chamber and has a second inner diameter, and wherein the first inner diameter is greater than the second inner diameter.  
   
   
       13 . The vacuum cleaning tool according to  claim 12 , wherein the connecting socket comprises a separate socket insert, wherein the first and second sections are provided on the socket insert.  
   
   
       14 . The vacuum cleaning tool according to  claim 13 , wherein the socket insert is secured by a catch in the connecting socket.  
   
   
       15 . The vacuum cleaning tool according to  claim 13 , wherein the socket insert has a circumferentially extending shoulder between the first section and the second section.  
   
   
       16 . The vacuum cleaning tool according to  claim 13 , wherein the inner diameter widens in a flow direction of the vacuum air flow.  
   
   
       17 . The vacuum cleaning tool according to  claim 1 , comprising a belt drive drivingly connecting the air turbine and the brush roller, wherein the working chamber has several of the at least one vacuum air port, wherein at least one of said several vacuum air ports extends from a bottom of the working chamber across a housing edge upwardly into a front end face of the housing, wherein said several vacuum air ports are positioned transversely to the longitudinal axis of the vacuum cleaning tool adjacent to one another, wherein through each of said several vacuum air ports a partial vacuum air flow of the vacuum air flow enters the working chamber and the vacuum air flow combined of the partial vacuum air flows passes into the turbine chamber, and wherein a belt pulley of the belt drive is fixedly connected to a base member of the brush roller and is positioned between ends of the brush roller in an area between two of said several vacuum air ports.  
   
   
       18 . The vacuum cleaning tool according to  claim 17 , wherein said several vacuum air ports are of approximately identical configuration and are spaced at approximately identical spacing from one another.  
   
   
       19 . The vacuum cleaning tool according to  claim 17 , wherein all of said several vacuum air ports extend from the bottom of the working chamber across the housing edge upwardly into the front end face of the housing.  
   
   
       20 . The vacuum cleaning tool according to  claim 17 , wherein a portion of the belt pulley is formed as a monolithic part of the base member of the brush roller.  
   
   
       21 . The vacuum cleaning tool according to  claim 17 , wherein the belt pulley is a monolithic part of the base member of the brush roller.  
   
   
       22 . The vacuum cleaning tool according to  claim 17 , wherein the housing in the area between said two of said several vacuum air ports has a housing web that covers the belt pulley and a driving belt extending about the belt pulley.  
   
   
       23 . The vacuum cleaning tool according to  claim 22 , wherein the housing web and the belt pulley delimit a substantially closed receiving space for the driving belt.