Cutting device of self-centering cutter holder

Abstract

A cutting device of a self-centering cutter holder is disclosed. The cutting device includes a cutter holder with a main body and a base body. A cutter mounting part and an extension handle part are separately arranged at upper and lower parts of the main body; the extension handle part is at least partially connected to a pressing surface at the lower side of the main body and is provided with a supporting surface and a central axis, around which a surface plain line of the supporting surface forms an angle. The cutter holder is mounted in a containing part of the base body through the extension handle part, and can independently generate fastening force to fix the cutter holder and the base body together, so that the whole cutting device is greatly improved in reliability and is greatly prolonged in service life, and the production cost is reduced.

What is claimed is: 
     
         1 . A cutting device of a self-centering cutter holder, which is applied on a ground processing machine, comprising a cutter holder ( 2 ) and a base body ( 3 ); wherein the cutter holder ( 2 ) is provided with a main body ( 210 ), a cutter mounting part ( 22 ) is arranged in a machining side area at the upper part of the main body ( 210 ), an extension handle part ( 202 ) is arranged at a fixed part side at the lower part of the main body ( 210 ), the extension handle part ( 202 ) is at least partially connected to a pressing surface ( 28 ) at the lower side of the main body ( 210 ), the extension handle part ( 202 ) is provided with a supporting surface ( 203 ) and a central axis (L), and a surface plain line ( 206 ) of the supporting surface ( 203 ) forms an angle around the central axis (L). 
     
     
         2 . The cutting device of the self-centering cutter holder of  claim 1 , wherein a containing part ( 30 ) is arranged on the upper end surface of the base body ( 3 ); the containing part is a concave surface adaptive to the extension handle part ( 202 ) in shape; and the cutter holder ( 2 ) is mounted in the containing part ( 30 ) of the base body ( 3 ) through the extension handle part ( 202 ). 
     
     
         3 . The cutting device of the self-centering cutter holder of  claim 2 , wherein the containing part ( 30 ) and the extension handle part ( 202 ) are coaxially arranged, so that the cutter holder ( 2 ) can rotate through the containing part ( 30 ) of the base body ( 3 ). 
     
     
         4 . The cutting device of the self-centering cutter holder of  claim 1 , wherein the angle (a) is an acute angle, preferably ranging from 5 degrees to 15 degrees. 
     
     
         5 . The cutting device of the self-centering cutter holder of  claim 4 , wherein the extension handle part ( 202 ) is in the shape of a semi-cone with a diameter gradually reducing from top to bottom. 
     
     
         6 . The cutting device of the self-centering cutter holder of  claim 5 , wherein a ratio of the top diameter (x) of the extension handle part ( 202 ) to a bottom diameter (y) of the extension handle part ( 202 ) is 1.1-2. 
     
     
         7 . The cutting device of the self-centering cutter holder of  claim 6 , wherein the diameter (x) is 50-60 mm, and the diameter (y) is 35-45 mm. 
     
     
         8 . The cutting device of the self-centering cutter holder of  claim 7 , wherein the cutter mounting part ( 22 ) of the cutter holder ( 2 ) is provided with a central axis (L 0 ); the central axis (L) and the central axis (L 0 ) are distributed in a virtual plane (M), namely a symmetrical plane of the cutter holder ( 2 ). 
     
     
         9 . The cutting device of the self-centering cutter holder of  claim 8 , wherein the central axis (L 0 ) of the cutter mounting part ( 22 ) and the central axis (L) of the extension handle part ( 202 ) form an included angle (c) ranging from 130 degrees to 140 degrees on the symmetrical plane (M). 
     
     
         10 . The cutting device of the self-centering cutter holder of  claim 1 , wherein the edge of the pressing surface ( 28 ) is equipped with a dismounting part ( 23 ) with a pit, and the dismounting part is used as a standby part for dismounting the cutter holder ( 2 ).