CN2488627Y - Automatic locking anti-skid twist drill - Google Patents

Abstract

The utility model relates to an automatic locking antiskid twist drill belongs to the instrument class, it is reformed transform into by current straight handle twist drill, solve the problem that straight handle twist drill easily skids, characterized by that, the drill bit near the stalk portion of straight handle twist drill and the joint portion of non-working portion is equipped with one on the surface and has the disconnected or complete protrusion ring of protrusion arris piece, the afterbody of the arris angle directional drill bit of arris piece, during the installation, protrusion ring and arris piece clamp are in the three-jaw outside of drill chuck, in operation, the arris piece can cross the jack catch top automatically, get into the clearance space between the three-jaw, friction structure when static between drill bit handle and the three-jaw is automatic under operating condition to change into non-slip mosaic structure.

Description

The anti-skidding fluted drill of auto lock

The utility model relates to the anti-skidding fluted drill of a kind of auto lock, relates to a kind of bit sub face specifically and is provided with a drill bit that has the interruption of protruding tip rib piece or complete protrusion garden ring, belongs to the instrument class.

At present, people are also using traditional drill bit, the drillstock of this drill bit is shaped as the garden column type, the drillstock of garden column type during use, be clamped in three claws of drill chuck, drill chuck drives the fluted drill rotation by three claws by friction and realizes boring, and drill bit skids easily, clamp and often compare difficulty, influence operating efficiency.The final way that solves is to change drill chuck often.

The purpose of this utility model just is to design the convenient or anti-skidding fluted drill of self-holding auto lock of a kind of clamping, overcoming the deficiencies in the prior art, and prolongs the service life of drill chuck.

The purpose of this utility model is achieved in that it is formed by existing drill main body (1) transformation of the way.It is characterized in that: on the shank (2) of drill main body (1) and the junction surface of inoperative portion (3) or shank (2) the bit face near the position of inoperative portion (3), be provided with one and have protrusion interruption or the complete garden ring (5) that protrudes tip rib piece (4), the corner angle of rib piece (4) point to afterbody (6), the size of rib piece (4) is decided according to the diameter of drill main body (1), drill bit afterbody (6) gives apart from drill chuck bottom (7) and stays gap (8) during installation, rib piece (4) is clipped in outside three claws, during work, drill bit is shunk back, rib piece (4) can insert the space between three claws automatically, and the claw top touches protrusion garden ring (5) back drill bit and no longer shrinks back.

The utility model is compared with prior art: in the work, after drill chuck is with a period of time owing to easily skid, has only very stick of tool chuck, directly painful with the hand of keyboard, the weldering of key afterburning or adding sleeve on the key, when bad or garden bore deformation key skids when the ring-like teeth groove plate of drill chuck, just dash or pound, when above method is all invalid, must scrap drill chuck.When changing drillstock type shape, when drillstock is worn into triangular or six ribs, though non-slip, when light is more secretly worked with bench drill, insert drill bit or see, or shake inconvenience.The utility model is easy to loading and unloading quick, and its quick degree is incredible, clamps automatically, and is non-slip, the drilling efficiency height; Also can make the drill chuck that to scrap be continued normal use, prolong the service life of drill chuck.

Below engaging drawings and Examples further specifies the utility model.

Drill bit tail end and drill chuck endoporus bottom position schematic diagram when accompanying drawing 1 is the utility model structural element schematic diagram and installation.

Wherein: 1, drill main body; 2, shank; 3, inoperative portion; 4, rib piece schematic diagram; 5, protrusion garden ring schematic diagram; 6, afterbody; 7, drill chuck endoporus bottom and shape schematic diagram; The gap schematic diagram is stayed in giving when 8, install drill bit afterbody and drill chuck bottom.

Referring to accompanying drawing, it is formed the utility model by existing drill main body 1 transformation of the way, described drill main body 1 is a straight shank twist drill, its improvement is: shank 2 is lacked some slightly and is as the criterion to be fit to three claw length, on the shank 2 of drill main body 1 and the junction surface of inoperative portion 3 or the bit face of shank 2 near the position of inoperative portion 3, be provided with protrusion interruption an or complete garden ring 5 that has the tip rib piece 4 of protrusion, the corner angle of rib piece 4 point to afterbody 6, and the size of rib piece 4 is decided according to the diameter of drill main body 1.During installation, drill bit afterbody 6 gives with drill chuck endoporus bottom 7 and stays gap 8, rib piece 4 is clipped in outside three claws, and hand is twisted the movable garden of drill chuck ring, clamps drill bit, do not need to twist with key, the work of just can punching this moment, drill bit is shunk back during work, and rib piece 4 can be crossed three claw tops automatically and insert space between three claws, the claw top is pushed up protrusion garden ring 5 back drill bits and is just no longer shunk back, and the friction between drillstock and three claws just drives the mosaic texture that formation automatically can not be skidded at this moment; During installation, after also can inserting drillstock, two fingers pinch protrusion garden ring 5, a finger touches the movable annulus of drill chuck simultaneously, the direct starting switch of another hand, this moment, drill bit was clamped automatically, do not need to twist, more do not need one time or twice with key difference three hole balances with hand, skid or skid the 3rd time when will be hole drill saturating, the 4th time twist, the work of can directly punching, after the punching beginning, the space between three claws is injected in 4 meetings of rib piece automatically, and claw pushes up protrusion garden ring 5 back drill bits and no longer shrinks back, and the friction between drillstock and three claws drives and just forms mosaic texture automatically at this moment, can not skid, concentricity is also unaffected; As convenient with electric hand drill.Operation principle of the present utility model resembles the pedal clutch fork of punch press, resembles the engage a gear clutch of motorcycle in other words, and it is in working order down because the automatic engage a gear of downforce of electric drill is realized boring thereby drive the drill bit rotation.In the objective reality, along with the big spoke degree decline of electric hand drill and drilling machine price, the drill chuck material quality of a large amount of low price is generally relatively poor on the market, does not just easily skid with long-time, and this realistic problem has fundamentally thoroughly been solved by the utility model.

Claims (1)

1, the anti-skidding fluted drill of a kind of auto lock, it is formed by existing drill main body (1) transformation of the way, it is characterized in that: on the shank (2) of drill main body (1) and the junction surface of inoperative portion (3) or shank (2) the bit face near the position of inoperative portion (3), be provided with one and have protrusion interruption or the complete garden ring (5) that protrudes rib piece (4), the corner angle of rib piece (4) point to afterbody (6), and the size of rib piece (4) is decided according to the diameter of drill main body (1).

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