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A grinder including a power drive unit having a driving shaft and a bevel gear fixedly mounted on one end of the driving shaft, and a grinding unit coupled to the power drive unit, the grinding unit including a grinding bit and a transmission mechanism coupled between the grinding bit and the bevel

A grinder including a power drive unit having a driving shaft and a bevel gear fixedly mounted on one end of the driving shaft, and a grinding unit coupled to the power drive unit, the grinding unit including a grinding bit and a transmission mechanism coupled between the grinding bit and the bevel gear of the power drive unit, wherein the grinding unit has a retaining hole and a coupling flange disposed at a rear side thereof at different elevations; the power drive unit has a front coupling slot at a bottom side thereof which receives the coupling flange of the grinding unit, a pair of lugs raised from the periphery at a top side thereof, a lever pivoted to the lugs, and a hook pivoted to the lever and forced by the lever to hook in the retaining hole of the grinding unit. The transmission mechanism of the grinding unit can be alternatively made in a first form to turn the grinding bit in X-axis, a second form to turn the grinding bit in Y-axis, or a third form to reciprocate the grinding bit.

대표청구항 ▼

[ What the invention claimed is:] [1.] A grinder comprising,a power drive unit having a driving shaft, wherein a bevel gear is fixedly mounted on one end of said driving shaft, anda grinding unit releasably connected to said power drive unit, said grinding unit comprising a grinding bit and a transm

[ What the invention claimed is:] [1.] A grinder comprising,a power drive unit having a driving shaft, wherein a bevel gear is fixedly mounted on one end of said driving shaft, anda grinding unit releasably connected to said power drive unit, said grinding unit comprising a grinding bit and a transmission mechanism coupled between said grinding bit and said bevel gear of said power drive unit when grinding unit and power drive unit are connected, whereinsaid grinding unit comprises a retaining hole and a coupling flange disposed on opposite sides thereof at different elevations with respect to one another said power drive unit comprises a coupling slot on a side thereof which receives said coupling flange of said grinding unit, when power drive unit and grinding unit are connected said power drive unit also comprising a pair of lugs raised from a periphery of said power drive, a lever pivoted to said lugs, and a hook pivoted to said lever and forced by said lever to hook in said retaining hole of said grinding unit when power drive unit and grinding unit are connected.