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A drill bit grinding machine including a grinding control device controlled to move the drill bit, permitting it to be ground by the grinding wheel, the grinding control device including a mounting base, a coupling block pivoted to the mounting base to hold a bit holder, a side board coupled to the

A drill bit grinding machine including a grinding control device controlled to move the drill bit, permitting it to be ground by the grinding wheel, the grinding control device including a mounting base, a coupling block pivoted to the mounting base to hold a bit holder, a side board coupled to the coupling block, a driven gear controlled to turn the bit holder, an axial movement control block controlled to move the bit holder axially, a tilt angle control device controlled to adjust the tilt angle of the bit holder, and a drive gear controlled to turn the driven gear and the tilt angle control device.

대표청구항 ▼

A drill bit grinding machine comprising a machine base, a mount raised from said machine base, a power drive mounted on said mount, a grinding wheel turned by said power drive, a longitudinal dovetail groove longitudinally raised from said machine base, a longitudinal dovetail slide controlled by a

A drill bit grinding machine comprising a machine base, a mount raised from said machine base, a power drive mounted on said mount, a grinding wheel turned by said power drive, a longitudinal dovetail groove longitudinally raised from said machine base, a longitudinal dovetail slide controlled by a sliding control device to move in said longitudinal dovetail groove and having a transverse dovetail groove, a transverse dovetail slide controlled by a sliding control device to move in the transverse dovetail groove of said longitudinal dovetail groove, an index plate mounted on said transverse dovetail slide, and a grinding control device fastened to said index plate, wherein said grinding control device comprises: a mounting base having a center through hole fastened to said index plate, two upright lugs bilaterally disposed at one end, each of said upright lugs defining a respective pivot hole; a coupling block mounted on said mounting base, said coupling block comprising a body defining an axial through hole, two forward coupling arms raised from two opposite sides of said body and defining a respective pivot hole respectively connected to the pivot holes of the upright lugs of said mounting base by a respective pivot, and a plurality of spring elements at a bottom side thereof respectively supported on said mounting base; a bit holder coupled to said coupling block, said bit holder comprising a stepped hollow shaft inserted into the axial through hole of said coupling block and having a coupling flange raised around one end, said coupling flange having equiangularly spaced mounting holes, and a chuck fastened to the mounting holes of said coupling flange and adapted for holding the drill bit to be ground; a side boards coupled to said coupling block at one side remote from said bit holder, said side board having a first through hole through which said stepped hollow shaft is inserted, a second through hole, and a third through hole; a transmission gear fixedly mounted around said stepped hollow shaft; a spring mounted around said stepped hollow shaft and stopped between said side board and said transmission gear; a first axle and a second axle respectively mounted in the second through hole and third through hole of said side board; an annular axial movement control block fixedly coupled to said transmission gear at one side, having two spiral sloping surfaces symmetrically disposed at two opposite sides, and two conical blocks respectively raised from said spiral sloping surfaces at one end, each of said conical blocks having a slope at one side; a tilt angle control device coupled to said first axle, said tilt angle control device comprising an elongated block vertically supported on said mounting base and having an elongated slot coupled to said first axle, a driven gear fixedly mounted around said fist axle and meshed with said transmission gear, a bearing fixedly mounted on said elongated block at one side above said elongated slot, a cam mounted around said first axle and disposed in contact with the bearing of said tilt angle control device; a drive gear mounted on said second axle and meshed with said transmission gear at one side opposite to said driven gear, the ratio of number of teeth between said drive gear, said transmission gear, and said driven gear being 1:1:2; a side cover covered on said side board, said side cover comprising a first through hole which receives said annular axial movement control block, a second through hole which receives said first axle, and a third through hole which receives said second axle; a driving device coupled to said second axle outside said side cover and adapted for turning said second axle and said drive gear; and a locating mechanism mounted on said side cover on the outside and having at least one bearing abutted against said axial movement control block.