Patent ID: 8197309
Filing Date: 2012-06-12
Classification: B24D

Abstract:
1. A grinding wheel assembly ′ comprising: a coupling member having opposite a front end and a rear end, and a first central axial line extending through both said ends, a plurality of bulged anchor rims provided on the periphery of the coupling member and encircling around the first central axial line of the coupling member, the center of the coupling member having round hollow ducts formed on the front end and the rear end each, along the first central axial line being a first shaft duct whose diameter is less than those of hollow ducts, the first shaft duct linking through both hollow ducts, and the coupling member being surrounded by a plurality of longitudinally penetrated ventilation openings parallel with the first central axial line; two symmetrical clamping disks having a disk each, the first surface of each disk having a concaved anchor trough whose contour matches to the front end and rear end of the coupling member which can be anchored onto the troughs of both said clamping disks, the center of the anchor trough of each clamping disk having a cylinder whose outer diameter matches to the hollow ducts' diameter of the coupling member, the cylinders of the two clamping disks being inserted into the hollow ducts respectively, the center of the cylinders on both clamping disks having a second shaft duct longitudinally extended and corresponded to the first shaft duct, the opposite side of the first surface on each disk having a second surface whose center has a polygonal trough which is interlinked with the second shaft duct, a plurality of protruding rods being formed on the first surface and distributed around the contour of the anchor trough, a plurality of penetrating ventilation holes being drilled on the bottom of the anchor trough and around the central cylinder of the disk, and each penetrating ventilation hole corresponding with a ventilation opening of the coupling member; and a grinding wheel having a front end, a rear end and a second central axial line extending through both said ends, each end having a clamping trough whose diameter matches to the diameter of the disk and enables the disk to be mounted into the clamping trough, the center of the grinding wheel having a coupling opening extending along the second central axial line, the inner wall of the coupling opening having a plurality of concaved anchor openings encircling around the second central axial line, the interior contour of the coupling opening exactly corresponding to the outline shape of the coupling member, the anchor rims being anchored within the anchor openings when the coupling member being inserted into the coupling opening, the bottom of each clamping trough having a plurality of mounting troughs whose diameter matches to the outer diameter of the protruding rod of the clamping disk and enables the protruding rods to be mounted into the mounting troughs, and a plurality of cogs encircling around the grinding wheel.