Holding device for a rotary tool

Abstract

The present invention discloses a holding device for a rotary tool, which is mainly used to hold a rotary tool, such as a wire brush wheel for removing rough edges, and the user should sleeves the wire brush wheel over the holding device before operation. In the present invention, the holding disc has a cylindrical portion, which can simplify the assembling of the rotary tool, and the holding disc together with the cylindrical portion is fabricated into an integral one-piece part. The design that the rotary tool completely sleeves the cylindrical portion of the first holding disc makes the support of the rotary tool more reliable. Besides, all the steel bristles are retarded by the cylindrical portion, and no gap will allow the steel bristles to shrink inward; therefore, the working efficiency of the rotary tool is promoted.

1 . A holding device for a rotary tool, used to hold a rotary tool and comprising:
 a first holding disc, further comprising: a cylindrical portion, at least one positioning slot formed along the rim of said first holding disc, a first positioning portion formed inside said cylindrical portion, and a first positioning hole located at said first positioning portion; and   a second holding disc, further comprising: at lest one positioning plate, which has a positioning edge to be inserted into said positioning slot, a second positioning portion corresponding to said first positioning portion, a second positioning hole located at said second positioning portion, and a fixing element inserted into said first positioning hole and said second positioning hole to form an engagement of said first holding disc and said second holding disc.   
   
   
       2 . The holding device for a rotary tool according to  claim 1 , wherein said positioning slots and said positioning plates are respectively arranged along the circumferences of said first holding disc and said second holding disc by identical angles. 
   
   
       3 . The holding device for a rotary tool according to  claim 1 , wherein said first holding disc together with said cylindrical portion is fabricated into an integral one-piece part. 
   
   
       4 . The holding device for a rotary tool according to  claim 1 , wherein said fixing element is a screw. 
   
   
       5 . The holding device for a rotary tool according to  claim 1 , wherein said second positioning hole has a hexagonal cross section. 
   
   
       6 . The holding device for a rotary tool according to  claim 5 , wherein a hexagonal coupling shaft matches said second positioning hole and is fixed to the internal thread of said fixing element. 
   
   
       7 . The holding device for a rotary tool according to  claim 1 , wherein said rotary tool sleeves the external surface of said cylindrical portion and is constrained and secured by said positioning plates.