Power tool having a disk-shaped tool, and Method for fastening or for releasing the tool

Abstract

A power tool having a disk-shaped tool, wherein the tool is able to be fastened to a drive shaft of the power tool by means of a fastening nut, wherein the drive shaft is set up to transmit a torque of the drive to the tool. The power tool is set up to loosen or tighten the fastening nut by at least one torque impulse of the drive of the power tool. A method for fastening a disk-shaped tool to a drive shaft of a power tool, and, in a further aspect, a method for releasing a disk-shaped tool from a drive shaft of a power tool is provided. The use of a torque impulse, which can be generated by a drive of a power tool, for tightening or loosening a fastening nut for fastening a disk-shaped tool to the power tool is also provided.

What is claimed is: 
     
         1 - 15 . (canceled) 
     
     
         16 : A power tool comprising:
 a drive;   a drive shaft;   a disk-shaped tool fastenable to the drive shaft of the power tool via a fastening nut, the drive shaft being set up to transmit a torque of the drive to the tool;   the power tool being set up to loosen or tighten the fastening nut via at least one torque impulse of the drive of the power tool.   
     
     
         17 : The power tool as recited in  claim 16  wherein the fastening nut is loosenable or tightenable without aids solely by means of the torque impulse of the drive of the power tool. 
     
     
         18 : The power tool as recited in  claim 16  wherein the drive includes an electronically commutated motor. 
     
     
         19 : The power tool as recited in  claim 16  wherein the at least one impulse includes a plurality of successive output torque impulses. 
     
     
         20 : The power tool as recited in  claim 16  further comprising at least one sensor for monitoring the at least one torque impulse. 
     
     
         21 : The power tool as recited in  claim 16  further comprising a tool fitting for receiving the tool. 
     
     
         22 : The power tool as recited in  claim 16  further comprising operator-control elements set up to initiate release or tightening of the tool using the fastening nut. 
     
     
         23 : The power tool as recited in  claim 20  further comprising electronics for evaluating data determined by the at least one sensor for evaluating inputs input via the operator-control elements. 
     
     
         24 : The power tool as recited in  claim 23  further comprising at least one sensor is arranged between the motor and the electronics. 
     
     
         25 : The power tool as recited in  claim 16  further comprising electronics for controlling the motor and a power supply of the motor. 
     
     
         26 : The power tool as recited in  claim 25  further comprising at least one sensor is arranged between the motor and the electronics. 
     
     
         27 : The power tool as recited in  claim 16  further comprising electrical connections for connecting operator-control elements, electronics, at least one sensor and the motor. 
     
     
         28 : The power tool as recited in claim in  claim 16  wherein sensor-less feedback of the motor is used to detect a change of angle in the motor. 
     
     
         29 : A method for fastening a disk-shaped tool to a drive shaft of a power tool, the method comprising the following steps:
 a) providing a power tool and a disk-shaped tool for the power tool;   b) providing a fastening nut for fastening the tool to the power tool;   c) connecting the power tool and the tool via the fastening nut; and   d) outputting a torque impulse through the drive of the power tool, the tool thereby being fastened to the drive shaft of the power tool via the fastening nut.   
     
     
         30 : The method as recited in  claim 29  wherein the torque impulse is output using a sensor. 
     
     
         31 : A method for releasing a disk-shaped tool from a drive shaft of a power tool, the method comprising the following steps:
 a) providing a power tool, a tool being fastened to the power tool via a fastening nut;   b) outputting a torque impulse through a drive of the power tool, the fastening nut thereby being loosened; and   c) separating the power tool and the tool.   
     
     
         32 : The method as recited in  claim 31  wherein the torque impulse is output using a sensor. 
     
     
         33 : A method comprising: using a torque impulse generatable by a drive of a power tool to tighten or loosen a fastening nut for fastening a disk-shaped tool to a power tool.