Apparatus for Mechanical Treatment of Surfaces

Abstract

Herein is described an apparatus for the mechanical treatment of surfaces comprising a wand ( 1 ), a head ( 2 ) that is movably fastened to the wand ( 1 ), a tool drive pad ( 3 ) attached in a rotatable manner to the head ( 2 ), a drive unit ( 4 ) for the drive of the tool drive pad ( 3 ), and a flexible shaft ( 5 ) that connects said tool drive pad ( 3 ) to the drive unit ( 4 ). According to the invention it is provided that the wand ( 1 ) ends at a distance from the head ( 2 ) and that the head ( 2 ) is held by a carrier hose ( 7 ) attached to the wand ( 1 ) which, during operation, transfers the transverse and tensile loads exerted upon the wand ( 1 ) to the head ( 2 ).

1 . An apparatus for the mechanical treatment of surfaces comprising
 a wand ( 1 ),   a head ( 2 ) that is movably fastened at the wand ( 1 ),   a tool drive pad ( 3 ) attached in rotatable manner to the head ( 2 ),   a drive unit ( 4 ) for the driving of the tool drive pad ( 3 ) and   a flexible shaft ( 5 ) that connects the tool drive pad ( 3 ) to the drive unit ( 4 )   characterized in that the wand ( 1 ) ends at a distance from the head ( 2 ) and that the head ( 2 ) is held by a carrier hose ( 7 ) attached to the wand ( 1 ) which, during operation, transfers to the head ( 2 ) pushing and pulling forces exerted upon the wand ( 1 ).   
   
   
       2 . An apparatus according to  claim 1 , characterized in that the shaft ( 5 ) comprises a shaft core ( 5   a ) and a shaft wrapping ( 5   b ) surrounding the shaft core ( 5   a ), wherein the shaft core ( 5   a ) is surrounded by at least one bearing ( 17 ) in the shaft wrapping. 
   
   
       3 . An apparatus according to  claim 2 , characterized in that the bearing ( 17 ) is an antifriction bearing, especially a needle roller bearing. 
   
   
       4 . An apparatus according to any of above claims, characterized in that the shaft ( 5 ) runs through the carrier hose ( 7 ). 
   
   
       5 . An apparatus according to any of above claims, characterized in that from the head ( 2 ) to the wand ( 1 ) runs a suction hose ( 10 ) for the suctioning off of dust generated by the treatment of surfaces. 
   
   
       6 . An apparatus according to  claim 5 , characterized in that the shaft ( 5 ) runs through the suction hose ( 10 ). 
   
   
       7 . An apparatus according to either  claim 5  or  6 , characterized in that the suction hose ( 10 ) surrounds the carrier hose ( 7 ). 
   
   
       8 . An apparatus according to any of the  claims 5  to  7 , characterized in that the suction hose ( 10 ) is configured as a bellows ( 10   a ) in a section adjacent to the head ( 2 ). 
   
   
       9 . An apparatus according to any of above claims, characterized in that the carrier hose ( 7 ) is a corrugated hose. 
   
   
       10 . An apparatus according to any of above claims, characterized in that the carrier hose ( 7 ) is a metal hose. 
   
   
       11 . An apparatus according to any of above claims, characterized in that the wand ( 1 ) is provided with a handle ( 14 ). 
   
   
       12 . An apparatus according to any of above claims, characterized in that the wand ( 1 ) consists of two sections ( 1   a ,  1   b ) connected to each other by, an articulated joint ( 6 ). 
   
   
       13 . An apparatus according to  claim 12 , characterized in that the joint ( 6 ) is lockable. 
   
   
       14 . An apparatus according to  claim 13 , characterized in that a mechanism for unlocking of the locked joint ( 6 ) is attached on the section of the wand ( 1 ) opposite to the head ( 2 ). 
   
   
       15 . An apparatus according to any of the  claims 12  to  14 , characterized in that the articulated joint ( 6 ) is a single axis joint. 
   
   
       16 . An apparatus according to any of the  claims 12  to  15 , characterized in that the section ( 1   a ) facing the head ( 2 ) has a length of less than ⅕, preferably less than ⅛, of the length of the second section ( 1   b ) connected to it by the joint ( 6 ). 
   
   
       17 . An apparatus according to any of the  claims 12  to  16 , characterized in that the section ( 1   a ) facing the head ( 2 ) is configured as a fork. 
   
   
       18 . An apparatus according to any of above claims, characterized in that the carrier hose ( 7 ) has a length of between 4 cm and 15 cm, preferably between 5 cm and 10 cm, between its fastening ( 8   b ) at the head ( 2 ) and its fastening ( 8   a ) at the wand ( 1 ). 
   
   
       19 . An apparatus according to any of above claims, characterized in that by means of the flexible shaft ( 5 ) the drive unit ( 4 ) is connected in a movable manner to the wand ( 1 ). 
   
   
       20 . An apparatus according to  claim 19 , characterized in that between the drive unit ( 4 ) and the wand ( 1 ) the flexible shaft ( 5 ) is surrounded by a protective hose ( 12 ). 
   
   
       21 . An apparatus according to  claim 20 , characterized in that the protective hose ( 12 ) is provided with spaced annular segments. 
   
   
       22 . An apparatus according to any of the  claims 5  to  21 , characterized in that the head ( 2 ) is provided with a dust suctioning hood ( 16 ) that has a lateral opening.