Fastening system, fastening adapter and fastening method

Abstract

The invention relates to a fastening system for mounting a roller-shaped tool on a drive shaft of a drive motor with the help of a fastening adapter comprising a hollow-cylindrical basic body which comprises in the interior a fastening apparatus for mounting on a drive shaft. A plurality of lamellae originate from the hollow-cylindrical basic body which are distributed about the cylinder axis and are spaced from one another by slits and which are each tilted in their direction perpendicular to the cylinder axis by a predetermined angle relative to the radial direction. The outside diameter of the fastening adapter can be reduced elastically by exerting pressure or the action of a shearing force in the direction of the tilting on the lamellae. The roller-shaped tool comprises a rigid cylindrical pass-through opening for this purpose whose inside diameter is smaller than the outside diameter of the fastening adapter in the relaxed state. The invention further relates to a fastening adapter for use in a fastening system and a method for fastening a roller-shaped tool with a tubular pass-through opening on a fastening adapter for a drive shaft of a drive motor, with the fastening adapter being embraced with a twist and thus being compressed and being slid in this state into the pass-through opening of the tool, that the compression is then removed, whereupon the fastening adapter expands again in the pass-through opening and thus forms a torsionally rigid connection with the tool by clamping and frictional engagement with the tool on its outer jacket surface.

1 . A fastening system for mounting a roller-shaped tool with a pass-through opening on a drive shaft of a drive motor, comprising: 
 a fastening adapter having a hollow-cylindrical basic body for mounting on the drive shaft and a plurality of lamellae spaced from each other by slits and distributed about the cylinder axis protruding outwardly from the body, with the lamellae each being tilted in a direction perpendicular to the cylinder axis at a predetermined angle α relative to the radial direction and the outside diameter of the fastening adapter, wherein in a relaxed state the fastening adapter is larger than the inside diameter of a pass-through opening of the roller-shaped tool, and can be reduced elastically by exerting pressure and/or through the action of a shearing force in the direction of tilting on the lamellae, and wherein the pass-through opening of the roller-shaped tool is arranged in a rigid and cylindrical fashion and the lamellae of the fastening adapter are tilted in the direction of movement of operation of the tool.    
   
   
       2 . A fastening system according to  claim 1 , wherein the pass-through opening of the roller-shaped tool is formed by a stiff pipe.  
   
   
       3 . A fastening system according to  claim 1 , wherein the fastening apparatus is internally threaded.  
   
   
       4 . A fastening system according to  claim 1 , wherein the lamellae of the fastening adapter consist of an elastic material with a hardness between 60 Shore and 100 Shore.  
   
   
       5 . A fastening system according to  claim 1 , wherein the lamellae of the fastening adapter have the smallest cross section at their contact point with the hollow-cylindrical basic body.  
   
   
       6 . A fastening system according to  claim 1 , wherein in the relaxed state of the fastening adapter the outer ends of all lamellae form a cylinder jacket surface interrupted by slits.  
   
   
       7 . A fastening system according to  claim 1 , wherein the circumferential edge of the fastening adapter is chamfered on at least one of its face sides.  
   
   
       8 . A fastening system according to  claim 1 , wherein the fastening adapter is extended in the center about the fastening apparatus on its face side which faces the drive motor in operation, as a result of which a cylindrical excess portion is formed which has a smaller diameter than the other part of the fastening adapter.  
   
   
       9 . A fastening system according to  claim 1 , wherein a thread for a setscrew as well as a setscrew are provided in the cylindrical excess portion, which setscrew is used in addition to the fastening apparatus for fixing the fastening adapter to the drive shaft.  
   
   
       10 . A fastening system according to  claim 1 , wherein the fastening adapter comprises a stop ring on the face side which faces the drive motor in operation, with the diameter of said ring being so large that it will not fit into the pass-through opening of the roller-shaped tool.  
   
   
       11 . A fastening adapter for use in a fastening system according to  claim 1 , which comprises a hollow-cylindrical basic body which has in the interior a fastening apparatus for mounting on the drive shaft and from which a plurality of lamellae protrude which are spaced from each other by slits and are outwardly distributed about the cylinder axis, with the lamellae each being tilted in their direction perpendicular to the cylinder axis about a predetermined angle α relative to the radial direction and the outside diameter of the fastening adapter being reducible elastically by exerting pressure and/or through the action of a shearing force in the direction of tilting on the lamellae, wherein the lamellae of the fastening adapter are tilted in the direction of movement which is preferred in operation.  
   
   
       12 . A method for fastening a roller-shaped tool with a rigid cylindrical pass-through opening on a fastening adapter for mounting on a drive shaft of a drive motor, comprising: 
 embracing the fastening adapter being with a twist and thus compressing it and in this state and sliding it into the pass-through opening of the tool and lifting the compression so that the fastening adapter expands again in the pass-through opening and thus forms a torsionally rigid connection with the tool by clamping and frictional engagement on its outer jacket surface, with the twist corresponding to a twisting of the outside circumference of the fastening adapter relative to its center in the direction of movement of operation of the tool.