8 results about "Drill bit shank" patented technology

The polycrystalline diamond multi-point cutting drill bit for the down-the-hole hammer comprises an installation base body, a drill bit handle is coaxially arranged at the top of the installation base body, a plurality of movable grooves are symmetrically formed in the edge of the bottom of the installation base body, a blocking face is arranged at one end in each movable groove, and an installation block body is contained in each movable groove. The ends, close to the blocking faces, of the installation block bodies are rotationally connected with the movable grooves, all the installation block bodies can rotate to the exterior of the installation base body, at the moment, the installation block bodies are all arranged on the blocking faces, and a plurality of polycrystalline diamonds are arranged on the bottom faces of the installation block bodies and the installation base body. When the drill bit is used, the mounting block body extends to the outside of the mounting seat body when the drill bit is forwards tunneled, so that the tunneled diameter of the mounting seat body can be enlarged, and when the drill bit is lifted and the mounting seat body is reversely rotated, the mounting block body can automatically rotate into the movable groove, so that the diameter of the drill bit is reduced, and the drill bit can be conveniently pulled out of a hole.

The utility model relates to tool grinder technical field, is a drill bit sharpening grinder, including the body, drill positioning subassembly, grinding base, grinding axle, grinding wheel, finishing mechanism and feeding subassembly, the upper side of body rear portion is equipped with the cross slide who can make the grinding base left and right, front and back movement, the upper side of grinding base front portion is equipped with the grinding axle. The utility model is reasonable and compact in structure, the drill positioning subassembly clamps the drill handle portion and rotates a certain angle, adjusts the included angle between drill center axis and grinding wheel center, grinding wheel can grind the top angle of drill according to the demand in this way, the drill positioning subassembly makes the drill bit edge swing up and down relative to grinding wheel, grinding wheel can grind the back angle of drill according to the demand in this way, the left side of grinding axle left department is fixed and installed with at least two grinding wheels, can carry out the grinding to the drill bit edge of multiple specifications, can guarantee the grinding efficiency while guaranteeing the grinding of multiple specifications drill.

A down-hole hammer drill tool, the drill tool comprising a percussive piston, a drive sub, a drill bit shank comprising a rearward external annular shoulder and a drill bit head, wherein the drill bit shank and the drill bit head are threadably connected.

The utility model discloses a diamond drill bit shackle structure, and relates to the technical field of trenchless construction and the like, the diamond drill bit shackle structure comprises a drill bit body and a clamping assembly, the drill bit body comprises a drill bit handle and a plurality of blades, one ends of the blades are gathered at the bottom end of the drill bit handle, and the other ends of the blades extend outwards. An upper buckling groove and a shackle groove are formed in the cutter wing, and the upper buckling groove and the shackle groove are formed in the two side walls of the cutter wing respectively; the clamping assembly comprises a shackle plate with a penetrating through hole formed in the middle, and protruding teeth which are used for entering the position between every two adjacent blades and are embedded into the upper buckling groove and the shackle groove of one blade are arranged on the inner wall of each penetrating through hole. According to the drill bit, the axial length of the drill bit is not additionally occupied while quick screwing-on and screwing-off are guaranteed, and meanwhile the screwing-on and screwing-off stability and the deformation resistance are guaranteed.

The utility model relates to the field of drill bit fixing mechanisms, and discloses a drill bit fixing mechanism of a hardware drilling machine, which comprises a main sleeve, a clamping mechanism is arranged in the main sleeve, the clamping mechanism comprises a clamping piece, the inner side of the clamping piece is fixedly connected with an anti-dropping bulge, and the two sides of the outer side of the clamping piece are fixedly connected with triangular sliding blocks. The outer sides of the clamping pieces are fixedly connected with sliding rods, and the lower ends of the clamping pieces are fixedly connected with outwards-protruding stepped teeth. By means of the simple hand pulling action, the drill bit can be quickly mounted or dismounted, the drill bit replacing time is shortened, and the hardware machining efficiency is improved; the clamping piece anti-disengaging protrusion is tightly meshed with the anti-disengaging groove of the drill bit handle portion, it is guaranteed that the drill bit cannot loosen or be eccentric or move in combination with the outwards-convex stepped teeth and the inwards-concave stepped tooth sleeve mechanism, and the rejection rate is reduced. The clamping piece assembly can be flexibly matched with drill bits of various diameters and handle types of different specifications, multiple different clamp devices do not need to be purchased, and cost is saved; the structural design is compact and reasonable and is not limited by space.

The utility model discloses a drill bit quenching frame, which relates to the technical field of quenching clamps and comprises a first fixing plate and a second fixing plate positioned below the first fixing plate, a plurality of elastic clamping devices are fixedly arranged at the lower end of the first fixing plate, and first fastening holes penetrating up and down are formed in the positions, corresponding to the elastic clamping devices, of the first fixing plate; the elastic clamping device comprises at least two elastic clamping pieces, the elastic clamping pieces are circumferentially distributed around the axes of the corresponding first fastening holes, the lower ends of the elastic clamping pieces jointly define a clamping hole, and the lower ends of the elastic clamping pieces make arc line contact with the outer side wall of the drill bit handle to be clamped. A plurality of second fastening holes penetrating up and down are formed in the second fixing plate, and the second fastening holes are in one-to-one correspondence with the elastic clamping devices; the lower end of each elastic clamping piece of the elastic clamping device is arranged in the second fastening hole in a penetrating mode. And the drill bit can stably keep a vertical fixed posture, the falling risk is reduced, and the safety of the quenching furnace is guaranteed.

This utility model discloses a special device for rock and mineral sampling and composition identification in geological research, including an impact drill and a rock and mineral drilling, grinding, sampling, screening, and collection mechanism connected to its chuck. The rock and mineral drilling, grinding, sampling, screening, and collection mechanism includes: a drill bit shank, clamped inside the impact drill's chuck; and a rotating sleeve, fixedly installed with the drill bit shank, having an opening on its left side and a tapered structure with a smaller left side and a larger right side on its inner side. This utility model, through a series of structural features, facilitates direct grinding to generate pulverized material during drilling and sampling, and allows for direct discharge of the pulverized material during drilling and sampling. The pulverized material is then collected through integrated vibration screening using the impact drill's vibration force. Personnel can directly observe the transparent sample collection box to visually determine whether a powder sample has been successfully collected, without needing to remove it for observation, thus improving ease of use. The integrated vibration screening method using the impact drill's vibration force enhances the screening effect.

The invention discloses a special precision drill bit for a plastic thin-wall part, and relates to the technical field of drill bits. The drill bit comprises a drill bit rod portion, a drill bit middle portion and a drill bit head portion, the cutting end of the drill bit head portion is provided with a composite cutting edge used for restraining burrs from being generated, and the outer circumferential face of the drill bit middle portion is provided with a large-curvature semicircular discharging opening used for discharging chippings. Through the design of the composite cutting edge, high-precision and low-burr cutting of the plastic thin-wall part is achieved, and the orifice quality and attractiveness are improved; due to the combination of the large-curvature semicircular discharging opening and the kidney-shaped hole airflow wedge groove, an efficient and active chip removal system is created, the problem that chips are accumulated and stuck is effectively solved, and machining continuity and efficiency are guaranteed; the integral strength and durability of the drill bit are ensured by integral forming and a specific material heat treatment process; the drill bit is high in overall design pertinence and particularly suitable for drilling operation of plastic thin-wall pieces difficult to machine such as PVC, ABS and PC, and the machining reliability, the yield and the production efficiency are remarkably improved.