Machine Tool Device, Tool Unit and Machine Tool System

Abstract

A machine tool device, in particular a tool adapter, for connecting a tool, in particular a brush, to a tool holder of a machine tool, in particular an angle grinder, has at least one driver unit for a rotationally fixed connection to the tool and at least one fastening unit for axial fastening of the tool to the tool holder. The machine tool device has a positive locking unit, via which the driver unit and the fastening unit can be connected to one another in a rotationally fixed manner via a positive lock.

1 . A machine tool device for connecting a tool to a tool holder of a machine tool, comprising:
 at least one driver unit configured to establish a rotationally fixed connection to the tool;   at least one fastening unit configured to axially fasten the tool to the tool holder; and   a positive locking unit configured to connect the driver unit and the fastening unit to one another in a rotationally fixed manner via a positive locking.   
     
     
         2 . The machine tool device according to  claim 1 , wherein the fastening unit is configured to be fastened to the tool holder by a movement of the driver unit. 
     
     
         3 . The machine tool device according to  claim 2 , wherein the driver unit has a mounting interface configured to cooperate with a mounting tool to generate the movement of the driver unit for fastening the fastening unit to the tool holder. 
     
     
         4 . The machine tool device according to  claim 1 , wherein the driver unit has at least one driver element configured to establish a rotationally fixed connection to the fastening unit and the rotationally fixed connection to the tool. 
     
     
         5 . The machine tool device according to  claim 1 , further comprising:
 at least one axial locking element configured to axially lock a connection of the fastening unit to the driver unit.   
     
     
         6 . The machine tool device according to  claim 1 , wherein the driver unit and the fastening unit have a fit to one another which functions according to the poka-yoke principle. 
     
     
         7 . The machine tool device according to  claim 1 , wherein the driver unit and the fastening unit are configured in one piece. 
     
     
         8 . A tool unit comprising:
 a tool; and   a machine tool device comprising:
 at least one driver unit configured to establish a rotationally fixed connection to the tool; 
 at least one fastening unit configured to axially fasten the tool to a tool holder of a machine tool; and 
 a positive locking unit configured to connect the driver unit and the fastening unit to one another in a rotationally fixed manner via a positive locking. 
   
     
     
         9 . The tool unit according to  claim 8 , characterized in that the machine tool device can be detachably attached to the tool, in particular detachably without tools. 
     
     
         10 . A machine tool system comprising:
 a machine tool; and   a tool unit comprising:
 a tool; and 
 a machine tool device comprising:
 at least one driver unit configured to establish a rotationally fixed connection to the tool; 
 at least one fastening unit configured to axially fasten the tool to a tool holder of the machine tool; and 
 a positive locking unit configured to connect the driver unit and the fastening unit to one another in a rotationally fixed manner via a positive locking. 
 
   
     
     
         11 . The machine tool device according to  claim 1 , wherein the machine tool device is a tool adapter. 
     
     
         12 . The machine tool device according to  claim 1 , wherein the machine tool device is configured to connect a brush to an angle grinder. 
     
     
         13 . The machine tool device according to  claim 1 , wherein the fastening unit is configured to be fastened to the tool holder by a rotation of the driver unit. 
     
     
         14 . The machine tool device according to  claim 5 , wherein the at least one axial locking element includes an O-ring configured to axially lock the connection of the fastening unit to the driver unit. 
     
     
         15 . The machine tool device according to  claim 5 , wherein the at least one axial locking element is configured to axially lock the connection of the fastening unit to the driver unit in a detachable manner without tools. 
     
     
         16 . The tool unit according to  claim 8 , wherein the tool is brush. 
     
     
         17 . The machine tool system according to  claim 10 , wherein the machine tool is an angle grinder.