Grinding Wheel Assembly for Facilitating Attachment and Detachment of a Grinding Tool

Abstract

The present invention relates to a grinding wheel assembly usable in a polishing machine for finishing a surface or floor, and more particularly, to a grinding wheel assembly for facilitating attachment and detachment of a grinding tool, capable of preventing damage to the grinding tool caused by centrifugal and frictional force produced by high speed rotation, and which reduces working time and enables convenient use due to easy replacement of the grinding tool. The grinding wheel assembly includes a ferromagnetic grinding tool, and a disk-shaped grinding wheel including a tool mounting part with a recess shape sized for mounting the grinding tool and a magnet embedded in one side. When required, a protruding separation prevention pin is provided to stably mount the grinding to the tool mounting part and a push injector pin is provided to facilitate attachment and detachment of the grinding tool.

1 . A grinding wheel assembly for facilitating an attachment and detachment of a grinding tool, comprising:
 a grinding tool ( 30 ) of ferromagnetic; and   a grinding wheel ( 1   a ) of a disk shape, having a tool mounting part ( 2 ) which is shaped as a recess sized for the grinding tool ( 30 ) to be mounted and into which a magnet ( 21 ) is embedded in one side of the inner surface wherein the tool mounting part ( 2 ) further comprises a push injector pin ( 4 ) that passes through the grinding wheel ( 1   a ) in order to push the bottom surface of the grinding tool ( 30 ) mounted in the tool mounting part ( 2 ) and separate the grounding wheel from the magnet ( 21 ).   
     
     
         2 . The grinding wheel assembly for facilitating an attachment and detachment of a grinding tool of  claim 1 , wherein the grinding tool ( 30 ) is constituted by a steel plate ( 33 ) provided with at least one pin through holes ( 32 ) in one side thereof and sized to be mounted in the tool mounting part ( 2 ), and a grinding tip ( 31 ) that is fixed protrudingly over the steel plate ( 33 ), and the tool mounting part ( 2 ) further comprises a separation prevention pin ( 22 ) that is protruded, corresponding to the number and location of the pin through hole ( 32 ). 
     
     
         3 . The grinding wheel assembly for facilitating an attachment and detachment of a grinding tool of  claim 2 , wherein the grinding wheel ( 1   a ) is further provided with a recess for pushing ( 3 ) of a concave shape into which the end of the grinding tool ( 30 ) is mounted protrudingly along the outer peripheral surface corresponding to the tool mounting part ( 2 ) in order to raise the end surface of the grinding tool ( 30 ) and separate easily the grinding tool from the magnet ( 21 ). 
     
     
         4 . The grinding wheel assembly for facilitating an attachment and detachment of a grinding tool of  claim 1 , wherein the grinding wheel ( 1   a ) is further provided with a recess for pushing ( 3 ) of a concave shape into which the end of the grinding tool ( 30 ) is mounted protrudingly along the outer peripheral surface corresponding to the tool mounting part ( 2 ) in order to raise the end surface of the grinding tool ( 30 ) and separate easily the grinding tool from the magnet ( 21 ). 
     
     
         5 . The grinding wheel assembly for facilitating an attachment and detachment of a grinding tool of  claim 1 , wherein the push injector pin ( 4 ) comprises a push bar ( 4   b ) that is movable through the grinding wheel ( 1   a ), a spring ( 4   a ) surrounding the part of the push bar that protrudes to the lower part of the grinding wheel ( 1   a ) and applying elastic force thereto, and a injector pin fixing screw ( 4   c ) for fixing and locating the push bar ( 4   b ) that has passed through the grinding wheel ( 1   a ). 
     
     
         6 . A grinding wheel assembly for facilitating an attachment and detachment of a grinding tool, comprising:
 a grinding tool ( 30 ) of ferromagnetic; and   a grinding wheel ( 1   a ) of a disk shape, having a tool mounting part ( 2 ) which is shaped as a recess sized for the grinding tool ( 30 ) to be mounted and into which a magnet ( 21 ) is embedded in one side of the inner surface wherein the grinding wheel ( 1   a ) is constituted by a mounting wheel plate ( 10 ) that is fixed to the grinding part and a replacement wheel plate ( 20 ) which is sized to be in face-contact with one surface of the mounting wheel plate ( 10 ) and mounted thereon, and is attachable and detachable by a locking device ( 5 ), and in which the tool mounting part ( 2 ) is formed.   
     
     
         7 . A grinding wheel assembly for facilitating an attachment and detachment of a grinding tool of claim.  6 , wherein the mounting wheel plate ( 10 ) of a disk shape is provided with a holding protrusion ( 11 ) that is fixed protrudingly by a fixing bolt ( 11   a ) on a middle part thereof, and a catching pin fixing hole ( 11   b ) that is formed on a top surface of the holding protrusion ( 11 ), and a locking device fixing hole ( 11   c ) that is provided on a middle part of the holding protrusion ( 11 ). 
     
     
         8 . A grinding wheel assembly for facilitating an attachment and detachment of a grinding tool of  claim 7 , wherein the replacement wheel plate ( 20 ) comprises:
 a replacement base plate ( 20 - 1 ) of a disk shape which has a middle hole ( 20 - 1   a ) through which the holding protrusion passes, is in face-contact with one face of the mounting wheel plate ( 10 ), and mounted, and in one side of which a pin recess ( 20 - 11 ) through which a separation prevention pin ( 22 ) passes is formed;   a magnet fixing plate ( 20 - 2 ) of a disk shape which has a middle hole ( 20 - 2   a ) through which the upper part of the holding protrusion ( 11 ) having passed through the replacement base plate ( 20 - 1 ) passes, is in face-contact with another face of the replacement base plate, and is mounted, and in one side of which a pin recess ( 20 - 22 ) through which the upper part of the separation prevention pin ( 22 ) having passed through the pin recess ( 20 - 11 ) of the replacement base plate passes and protrudes; and   a tool guide plate ( 20 - 3 ) in which a plurality of the tool mounting part ( 2 ) are formed at interval, which is mounted on a top surface of the magnet fixing plate ( 20 - 2 ), in which a middle hole ( 20 - 3   a ) sized for a bottom surface of the locking device ( 5 ) to be mounted on a top surface of the holding protrusion ( 11 ), and which supports the grinding tool ( 30 ) provided in the tool mounting part ( 2 ).   
     
     
         9 . A grinding wheel assembly for facilitating an attachment and detachment of a grinding tool of  claim 8 , wherein the separation prevention pin ( 22 ) comprises:
 a middle screw part ( 22   b ) that is screwed to the pin recess ( 20 - 11 ) of the replacement base plate ( 20 - 1 );   a head part ( 22   c ) that passes through a separation prevention pin head hole ( 12 ) of the mounting wheel plate ( 10 ) to the lower part of the middle screw part; and   a support pin part ( 22   a ) which passes through the pin recess ( 20 - 22 ) of the magnet fixing plate ( 20 - 2 ) to the upper part of the middle screw part and has a length capable of being inserted into the pin through hole ( 32 ) of the grinding tool ( 30 ) located in the tool mounting part ( 2 ).   
     
     
         10 . A grinding wheel assembly for facilitating an attachment and detachment of a grinding tool of  claim 8 , wherein the locking device ( 5 ) of a disk shape is provided with a locking wing ( 5   a ) protruding laterally, a middle bolt ( 5   d ) that is fixed to the holding protrusion ( 11 ) locking device fixing hole ( 11   c ) at a center thereof, a catching pin ( 5   b ) that is fixed to a catching pin fixing hole ( 11   b ), and a taper recess ( 5   c ) that controls a rotation angle of the locking wing ( 5   a ) by the catching pin ( 5   b ). 
     
     
         11 . A grinding wheel assembly for facilitating an attachment and detachment of a grinding tool of  claim 10 , wherein the locking wing has a 120° and protrudes in a radial direction. 
     
     
         12 . A grinding wheel assembly for facilitating an attachment and detachment of a grinding tool of  claim 10 , wherein a wing mounting part ( 20 - 24 ) to which the locking wing ( 5   a ) of the locking device ( 5 ) is mounted according to its rotation is protruded and extended in the middle hole ( 20 - 2   a ) of the magnet fixing plate.