CN205733151U - A kind of drill bit - Google Patents

Abstract

This utility model has carried for a kind of drill bit, and described drill bit includes annular protrusion position, the annular element at drilling rod rear portion, waves oriented side boring mechanism, bores boring dual-purpose blade head；Described annular protrusion position arranges notch direction annular joint groove obliquely；Described annular element is provided with and annular joint groove corresponding ring arc ball and socket joint; described annular element is enclosed within outside annular protrusion position by ring arc ball and socket joint; with shock absorbing drilling depth position limiting structure bottom described annular element, the generally rod iron that described drilling rod and drillstock are constituted enters clapper die spotting press and carries out matched moulds forge hot pressure or heat stamping and shaping.This utility model additionally provides the installation method of a kind of bolt.This utility model by using disposable matched moulds molding utility model and spacing with joint that shaft core is spacing basic point to drilling rod, the most cheap, but also avoid being expanded when cutting bottom outlet of boring bottom boring, concrete around hole is had a negative impact, it is ensured that the precision in hole also improves life-span of drill bit.

Description

A kind of drill bit

Technical field

This utility model relates to a kind of drill bit, it is adaptable to completes boring on all kinds of building concretes and expands boring with bottom.Especially Being applicable to construction on ceiling hanging and thin wall can effectively prevent impact from causing adjacent room to damage, and this utility model further relates to bolt Installation method.

Background technology

Existing concrete boring mainly divides 2 kinds of patterns with expanding bore hole drill bit:

The intumescent crab-bolt of line dilating principle is poor due to safety, the most banned for curtain wall, lifeline engineering ... etc., And existing be considered safer and cut reaming crab-bolt, owing to cutting reaming boring technological problems, there is also more problem:

One, drill bit cost is high, and the life-span is the shortest, and is only used for large hole, and market audient is narrower.As: the patent No. CN200420089975 deep hole drift.

Its two, in order to coordinate, to cut the degree of depth of reaming spacing, with rigid steel plate limit-type drill bit drill straight hole, and is rushed by electric hammer Hit when being drilled to straight hole under effect, make impact shake stress concentrate on and cause fracture at spacing top and jump ring.In addition to save Cost, adapted common electric drill earlier bores as the expansion bore hole of power, though so having saved from drill bit cost, but it expands boring Bottom outlet drill bit uses the spacing flat pad of the degree of depth, is enclosed within drilling rod on flat with the limited support of outer protrusion, waves in inclination During base expanding and base expanding hole, arise that differential seat angle, differential seat angle bring about about 10 millimeters of gaps owing to limited support is flat when tilting The hard impact stroke swung up and down spacing, cause to expand boring the tapered hole matched with crab-bolt, become in tapered hole Portion suffers that concrete hole breakage becomes big, has become extension horn-like so that crab-bolt occurs expanded casing to pull out to make when load Become crab-bolt displacement, cause nut lax and structural member is sagging, to breakneck from the point of view of curtain wall.As patent CN89106532 is produced Root is had to cut the rig of boring.

Its three, in order to solve the spacing problem of rigid steel plate, use elasticity of plastics spacing, and under being impacted by electric hammer so that Steel plain cushion banking stop in plastics impacts conflict mutually with the flange of drilling rod upper limit plane, the plane of flange when tilting expansion boring Fulcrum will angulation, outside its angle band dealing hole, the elasticity of plastics impact stroke of direction the most about 10 millimeter is spacing, Cause and should expand the tapered hole that boring one-tenth matches with crab-bolt, but tapered hole top suffers that concrete hole breakage becomes big, has become extension Horn-like so that crab-bolt occurs expanded casing to pull out to cause crab-bolt displacement lax when load, and the plastics of drill bit The shell spacing life-span about just scraps about 50 holes, and this becomes originally to say for this drill bit accounting for about 15 yuan of every hole, involves great expense aobvious It is luxurious to obtain.As: patent No. CN92101397, for being gone out the drill bit of boring by side cutting.

China has been enter into labor shortage and machine for people's epoch, the drill bit of this kind of expansion bore hole, no matter America and Europe or I State, it all must employ numerical control device moulding and can produce, and its price is all in hundreds of units and nearly 1,000 yuan, and its drill bit cost has exceeded anchor Bolt product price, seriously restricts industry development.To this end, the boring of research and development low cost, high effect is bit Integrated with expansion boring, Market prospect is had an optimistic view of.

Utility model content

For problems of the prior art, the purpose of this utility model is to provide a kind of drill bit, by drilling rod Use disposable matched moulds molding utility model and spacing with joint that shaft core is spacing basic point, the most cheap, but also keep away Exempt to be expanded when cutting bottom outlet of boring bottom boring, the concrete around hole is had a negative impact, it is ensured that the precision in hole also improves brill The life-span of head.For achieving the above object, this utility model is by the following technical solutions:

A kind of drill bit, including transmission drillstock, drilling rod, it is characterised in that described drill bit also includes the annular protrusion at drilling rod rear portion Position, annular element, wave oriented side boring mechanism, bore boring dual-purpose blade head；It is oblique that described annular protrusion position arranges notch direction Downward annular joint groove；Described annular element is provided with and annular joint groove corresponding ring arc ball and socket joint, described annular element It is enclosed within outside annular protrusion position by ring arc ball and socket joint, with shock absorbing drilling depth position limiting structure, institute bottom described annular element The ring arc ball and socket joint internal diameter stated is less than notch external diameter above the groove of joint；The described side boring detent mechanism that waves includes being located at described pass Centre between joint groove bottom and the cutoff edge top, side boring boring dual-purpose blade head is waved supporting part and is in centre and waves Necking part above support part, drilling rod waves supporting part to the interlude diameter of necking part and is gradually reduced from centre；On described drilling rod Between drilling rod to joint groove, it is provided with counter-clockwise helical chip area from boring boring dual-purpose blade head；

The generally rod iron that described drilling rod and drillstock are constituted enters clapper die spotting press and carries out matched moulds forge hot pressure or heat stamping and shaping.

On the basis of using technique scheme, this utility model also can be respectively adopted technical scheme further below Or these solution pool are used:

Described counter-clockwise helical chip area has been connected by skewed slot, translot, and the head and the tail of translot are all connected to skewed slot, described drilling rod On blade groove is set, blade groove connects with skewed slot.

Being provided with metallic elastic latch fitting between described ring arc ball and socket joint and joint groove, described metallic elastic latch fitting has the end Portion, described bottom and described joint groove are conflicted and are obtained support, and described metallic elastic latch fitting also has collateral in the both sides of bottom Support local, the side support part of both sides contacts with the upper and lower of ball and socket joint and makes ball and socket joint obtain and support.

Described metallic elastic latch fitting is ring set structure, and has the described bottom of formation and side support part in ring set structure Notch cannelure obliquely.

The bottom of described annular element is provided with the groove inserted for flexible anti-shock pad, and described shock absorbing drilling depth position limiting structure is adopted Use flexible anti-shock pad, by notch, the extruding of flexible anti-shock pad is locked jail flexible anti-shock pad, or be glued.

Described drilling rod is arranged over processing the cutter of aperture limited step the lower section of protruding parts and necking part.

Described brill boring dual-purpose blade head is that cross is overall, and its side cutoff edge expanding boring prolongs to inclination at cross entirety epicone Long, it is provided with location tip in the middle of its cross entirety；Described brill boring dual-purpose blade head, the side cutoff edge length of its side bore hole is longer than Boring blade.Four drill swords in described cross entirety all can add grow up to can side cutoff edge, but not necessarily because side is cut Workload is less, only needs 1-2 blade to meet.

Described drilling rod is disc, in order to solve counter-clockwise helical chip area because of along drilling rod disc spiral groove depth angle without Method completes the release problems that clamping system manufactures, and described drilling rod is divided into first side and second of left and right configuration on the basis of spue line Side, described counter-clockwise helical chip area has been connected by skewed slot, translot, and described counter-clockwise helical chip area is with the shape of described translot Formula passes to the second side from the first side, and described drilling rod also sets up blade groove, and blade groove connects with skewed slot；First side and the second side Described blade groove, translot, the grooved of skewed slot respectively meet the grooved required to the first side and the second side demoulding.

It is provided with in the clockwise direction front of the side cutoff edge of described expansion boring and guarantees that the expansion boring expanding boring and chip removal smoothly helps Cut room.

Second purpose of the present utility model is to provide the installation method of a kind of bolt, it is characterised in that

Before the mounting, the matrix that need to install bolt is holed with above-mentioned drill bit drill straight hole, the shock absorbing until described drill bit Degree of depth position limiting structure encounters aperture, and the shock absorbing drilling depth position limiting structure then utilizing described drill bit is spacing as shock absorbing self adaptation Structure, in the case of drilling depth is limited, waves drill bit with the supporting part that waves of drill bit for fulcrum, thus with the brill of drill bit The side cutoff edge cutting of boring dual-purpose blade head carries out bottom and expands boring, bottom formation by expand boring formed bottom side recessed cut bottom outlet, and During waving drill bit, the Tool in Cutting of processing aperture limited step is utilized to form aperture limited step, the height of limited step Degree exceeds the sleeve top 1-2mm of described bolt；

When mounted, first described bolt is put into and cut bottom outlet, make the aperture that is spacing and that cut bottom outlet of the fitting depth on sleeve limit Position step forms spacing cooperation；Then, using front end with push rod, push rod rear arranges the female thread screw thread with hub internal bore even The installation machinery of the screw rod connect, uses spiral way to advance, push rod push expansion pin and push ahead, until expansion pin is to lordosis The bottom stage face of the step gone out is spacing with the anti-breakdown spacing formation of sleeve to be coordinated, now, the expansion lobe of sleeve be expanded into Enter to cut the bottom side of bottom outlet recessed in, complete to install.

Owing to using the technical solution of the utility model, structure of the present utility model can realize using drilling rod disposable conjunction Mold forming, and in the parts of this simple in construction, it is achieved with the shock absorbing self adaptation spacing knot of articulated type that shaft core is spacing basic point Structure, had both avoided being expanded when cutting bottom outlet of boring bottom boring, and had had a negative impact the concrete around hole, also ensure that the precision in hole And improve life-span of drill bit, and, self adaptation articulated type position limiting structure can be mounted directly, it is possible to greatly reduces the one-tenth of drill bit This, reduce punching cost；And this utility model is when being applied to the installation of bolt, it is possible to preferably play and there is anti-breakdown spacing, peace The dress degree of depth is spacing, the function of the bolt of spacing this three-dimensional three limit protections of Anti-extrusion, it is possible to solve easily to hit when installing simultaneously Wear installation matrix and the problem of bonding strength.

Accompanying drawing explanation

Fig. 1 is that the master of a kind of embodiment of this utility model regards partial cutaway view, has wherein concealed shock absorbing drilling depth position limiting structure.

Fig. 2 is that the master of this utility model another kind embodiment regards partial cutaway view.

Fig. 3 is that the master of the third embodiment of this utility model regards partial cutaway view.

Fig. 3 a is that in the third embodiment of this utility model, the master of annular element regards partial cutaway view.

Fig. 3 b is the front view of this utility model metallic elastic latch fitting.

Fig. 4 a is the schematic diagram that this utility model bores boring first kind of embodiment of dual-purpose blade.

Fig. 4 b is the schematic diagram that this utility model bores boring dual-purpose blade head another embodiment.

Fig. 5 a is this utility model drilling rod, the unitarily formed side view of drillstock.

Fig. 5 b is this utility model drilling rod, the unitarily formed front view of drillstock.

Fig. 5 c is this utility model drilling rod, the unitarily formed upward view of drillstock.

Fig. 5 d is that this utility model drilling rod, drillstock single piece are divided into showing of the first side and the second rear flank on the basis of spue line It is intended to.

Fig. 6 is the schematic diagram of the drilling bottom outlet of this utility model drill bit.

Fig. 7 is the front view of the sleeve of a kind of bolt.

Fig. 8 is to expand the sectional drawing at lobe in Fig. 7.

Fig. 9 is the sectional view of Fig. 7 sleeve.

Figure 10 is the top view of Fig. 9.

Figure 11 is expansion pin and the prepackage schematic diagram of sleeve of this bolt shown in Fig. 7.

Figure 12 is the schematic diagram of the expansion pin in Figure 11.

Figure 13 is the top view of the expansion pin in Figure 11.

Figure 14 is the sectional view that bolt is installed to after installing in matrix.

Figure 15 is the installation process schematic diagram of bolt.

Detailed description of the invention

With reference to Fig. 1-6.A kind of drill bit provided by the utility model, including transmission drillstock 201, drilling rod 210.Described biography Dynamic drillstock 201 is provided with the groove hole that adaptive all kinds of electric hammer unit heads connect.

Described drill bit also include the annular protrusion position 213 at drilling rod rear portion, annular element 220, wave oriented side boring mechanism, Bore boring dual-purpose blade head 240；Described annular protrusion position arranges notch direction annular joint groove 212 obliquely；Described annular Parts are provided with and annular joint groove corresponding ring arc ball and socket joint 222, and described annular element is enclosed within ring by ring arc ball and socket joint 222 Outside shape protruding parts 220, with shock absorbing drilling depth position limiting structure 221 bottom described annular element, described ring arc ball and socket joint Internal diameter is less than notch 2120 external diameter above the groove of joint；Described wave side boring detent mechanism include being located at groove bottom, described joint and Bore the centre between the cutoff edge top, side of boring dual-purpose blade head wave supporting part 211 and be in centre and wave above supporting part Necking part 205, drilling rod waves supporting part to the interlude diameter of necking part and is gradually reduced from centre；From boring boring on described drilling rod Dual-purpose blade head is provided with counter-clockwise helical chip area between drilling rod to joint groove.

Use structure of the present utility model, the entirety that described drilling rod and drillstock are constituted that rod iron can be used to enter clapper die spotting press to enter Row matched moulds forge hot pressure or heat stamping and shaping, significantly reduce cost.

Being provided with metallic elastic latch fitting 230 between described ring arc ball and socket joint 222 and joint groove 212, described metallic elastic is locked Part has bottom 231, described bottom 231 and described joint groove and conflicts and obtain support, and described metallic elastic latch fitting is in bottom Both sides also have side support part 232, and the side support part 232 of both sides contacts with the upper and lower of ball and socket joint and makes ball and socket joint Obtain and support.So, shock absorbing drilling depth position limiting structure utilizes three point elasticity contacts to support and it can either be played accurately Limit function, play shock absorbing function, and have can be movable flexibly, it is simple to drilling operation, and, be in the notch of protruding parts Direction joint groove 212 obliquely, drilling rod below did not had any structure can stop annular element before installing cutter 220, it is possible to after facilitating the installation of annular element, and installation, metallic elastic latch fitting 230 can be utilized again to prevent it from falling down.

In the present embodiment, described metallic elastic latch fitting 230 is ring set structure, and has the formation described end in ring set structure The notch of portion 231 and side support part 232 cannelure obliquely.Described metallic elastic latch fitting is provided with at least 1 open slot 233, metallic elastic latch fitting can be made to be snapped in the groove of joint by pressure.

The transition that the top of described protruding parts is provided with between drilling rod strengthens position 218.

In the present embodiment, described drilling rod 210 is provided with processing aperture limited step 102 in the lower section of protruding parts 213 Cutter 215, drawing reference numeral 2150 is the pilot hole of cutter 215.

The bottom of described annular element is provided with the groove 224 inserted for flexible anti-shock pad, the described spacing knot of shock absorbing drilling depth Structure 221 uses flexible anti-shock pad, by the notch of groove 224, flexible anti-shock pad, the extruding of flexible anti-shock pad is locked jail, or uses Gluing jail.

As shown in Fig. 5 a, 5b, described chip area has been connected by skewed slot 203, translot 204, and the head and the tail of translot are all connected to list Side chute skewed slot 203, blade groove 202 connects with skewed slot 203.

As it was previously stated, use structure of the present utility model, the entirety that described drilling rod and drillstock are constituted can use rod iron to enter Enter clapper die spotting press and carry out matched moulds forge hot pressure or heat stamping and shaping, significantly reduce cost.Described drilling rod is on the basis of spue line 300 Being divided into the first side A and the second side B of left and right configuration, described counter-clockwise helical chip area has been connected by skewed slot 203, translot 204, Described counter-clockwise helical chip area passes to the second side B with the form of described translot 204 from the first side A；First side and the second side Described blade groove, translot, the grooved of skewed slot respectively meet the grooved required to the first side and the second side demoulding.

Described brill boring two can be formed in matched moulds forge hot pressure or heat stamping and shaping when manufacturing by mould in the bottom of drilling rod With the mounting groove 216 of blade head, it is provided with expansion boring in the clockwise direction front of the side cutoff edge of described expansion boring and helps and cut room 217.

Described brill boring cutter sword head 240, side cutoff edge 241 length of its side bore hole is longer than boring blade 242.Such as Fig. 4 b institute Showing, described brill boring dual-purpose blade head can be that cross is overall, and its side cutoff edge expanding boring prolongs to inclination at cross entirety epicone Long, its cross entirety intermediate settings position tip 243.Bore boring cutter sword head 240 to make for wear-resisting high-strength degree material, inlayed by welding Bottom drilling rod in mounting groove 216.

Described drillstring component surface is provided with nitrogen layer or the titanium layer increasing wearability.

With reference to Fig. 2, in the present embodiment, described annular element 220 has the hook coordinated with described transition enhancing position 218 223, so, can play and avoid stress to concentrate, expand, especially for needing to wave, the drill bit that boring uses, it is possible to significantly extend brill In the service life of head, annular element 220 can be protected again further, the most not hinder the joint of drilling depth position limiting structure to move simultaneously Make.

With reference to Fig. 6, drawing reference numeral 100 for installing matrix, be the main body that depended on of bolt to be mounted, such as wallboard or hang Top board.Drawing reference numeral 101 is for cutting bottom outlet, and drawing reference numeral 103 is to cut bottom bottom outlet by the side recessed 103 after expansion boring.

Drill bit provided by the utility model is for the installation of bolt.7-15 referring to the drawings, this utility model provides one The embodiment of bolt:

Bolt provided by the utility model is a kind of limited bolt, and including sleeve 1, the lower end of sleeve arranges expansion lobe 2, described Limited bolt also includes the expansion pin 3 being pre-loaded in sleeve, and described expansion pin is provided with pre-assembling structure, the endoporus 10 of described sleeve 1 In be provided with and the structure of described prepackage respective outer side edges.

Described sleeve 1 is provided with anti-breakdown spacing 4 coordinated with described expansion pin 3 and and installs the peace that matrix 100 coordinates The dress degree of depth spacing 5.

Fitting depth spacing 5 can be at an outwardly step of circle of sleeve upper end.

Described anti-breakdown spacing 4 is the inwardly projecting portion being in expansion lobe 2 end, and the head of described expansion pin 3 is provided with Forwardly convex step, the bottom stage face 31 of described step coordinates with described anti-breakdown spacing 4 so that expansion pin 3 is forward Moving contact to expansion lobe 2 inclined-plane after, move forward and continuous expansion expansion lobe 2 time, when bottom stage face 31 is touched To anti-breakdown spacing after, expansion pin 3 cannot be further continued for being integrally formed forward and with sleeve 1, and sleeve 1 is then spacing by the described dress degree of depth 5 with the coordinating of the aperture limited step 102 cutting bottom outlet 101 installing limited bolt installed on matrix, and can not be to depth direction Continue motion.

The inwardly projecting portion that the forwardly convex portion 32 of described forwardly convex step enters each expansion lobe 2 is (namely anti-breakdown Spacing 4) between 40, the side, top 41 in described forwardly convex portion 32 and inwardly projecting portion forms the spacing cooperation of Anti-extrusion, prevents Expansion lobe 2 to contract, further, described anti-breakdown spacing side, top 41 expansion lobe 2 unexpanded before in inverted cone Face (see Figure 12), the side 320 in described forwardly convex portion 32 is in the face of cylinder so that expansion pin 3 is bearing the retroaction of expansion lobe 2 Born at the maximum arm of force of power is pressure at right angle, prevents the expansion contributing to expanding lobe expansion when limited bolt is installed Lobe inclined-plane 21 produces crowding-out effect to expansion pin 3.

Described expansion pin arranges prepackage drive mechanism 34, and the endoporus 10 of described sleeve 1 expands up to close near aperture The position opening lobe 2 arranges female thread 11.The transition type introducing port 12 of protection female thread, this importing are set in described endoporus 10 upper end Mouth 12 is in cone and is not provided with screw thread, its objective is to lack when mounted guiding due to limited bolt, and limited bolt is being hit by hammer When entering to cut bottom outlet 101, it is easy to female thread is destroyed, causing follow-up article installation difficulty, therefore, described limited bolt utilizes cold Technique is made in upsetting, when extruding forms anti-breakdown spacing 4, utilizes and forms introducing port 12 with secondary mould with procedure, simultaneously by cold Upsetting is made technique and hardened material is strengthened, so, adopt hit with a hammer sleeve time, it is not easy to even if deformation and have a small amount of change Shape, does not interferes with aperture and the female thread 11 of endoporus 10 yet, thus solve female thread destroy and article difficulty install problem.

The side of described expansion pin 3 is provided with the prepackage salient point 33 that can coordinate with described female thread 11, makes expansion pin 3 to depend on Screw in be preloaded onto sleeve 1 bottom by described prepackage drive mechanism, make expansion pin 3 to be preloaded onto and form finished product on sleeve 1, make Expansion pin 3 can be unlikely to drop out when different angles are installed, and when expansion pin 3 advances expansion expansion lobe 2, this prepackage salient point 33 is certainly Dynamic fall down or deform or destroy lower internal thread, both having facilitated and upwards installed, the most not affecting the installation of limited bolt, and hub internal bore The female thread on 10 tops is completely preserved for connecting the article that need to install, and described prepackage drive mechanism can be interior hexagonal, outer Hexagonal, a word, cross, and other structure of input torsion can be made, so make expansion pin 3 also can be made by cold-heading and form.

The sleeve of described limited bolt formed along mould configuration (see Fig. 9 and Figure 10, can by cold-heading manufacture upsetting cause seamless body, Only need to be high to grooving 6 and tapping thread at expansion lobe 3, its compact structure intensity, simple exquisite inexpensive.

The outer surface of described sleeve 1 is provided with a circle at the root expanding lobe and easily opens groove 13, i.e. guarantees load intensity, can lead to again Crossing an easily groove 13 makes expansion lobe easily to be strutted.

The outer surface of described expansion lobe arranges spline load stricture of vagina 14, to increase concrete and expansion member coefficient of friction, makes Time in the female thread of the endoporus that anchor pole, screw mandrel are installed on sleeve, it is unlikely rotation.

Limited bolt presented above achieve in simple structure anti-breakdown spacing, fitting depth is spacing, Anti-extrusion Spacing, by this three-dimensional three limit protections, it is possible to solve easily to puncture installation matrix and bonding strength when installing simultaneously Problem, and structure manufacture easy for installation, easy, intensity are high, low cost.

The installation method of above-mentioned limited bolt is as follows:

Before the mounting, the matrix 100 that need to install limited bolt is used the drill bit drill straight hole of Fig. 1-6 illustrated embodiment, until The shock absorbing drilling depth position limiting structure 221 of described drill bit encounters aperture, and the shock absorbing drilling depth then utilizing described drill bit is spacing Structure is as shock absorbing self adaptation position limiting structure, in the case of drilling depth is limited, with drill bit wave supporting part 211 for Point waves drill bit, thus carries out bottom with side cutoff edge 241 cutting boring boring dual-purpose blade head of drill bit and expand boring, quilt bottom formation What expansion boring formation bottom side was recessed cuts bottom outlet 101, and during waving drill bit, utilizes the cutting tool of processing aperture limited step Aperture limited step 102 at 215 cuttings, the height of limited step exceeds the sleeve 1 top 1-2mm of described bolt.

When mounted, first described limited bolt is put into and cut bottom outlet 101, make the fitting depth on sleeve 1 spacing 5 and cut bottom outlet Aperture limited step 102 form spacing cooperation；Then, front end is used to arrange and hub internal bore with push rod 401, push rod rear The installation machinery 400 of the threaded screw rod 402 of female thread 11, use spiral way to advance, push rod 401 push expansion pin 3 push ahead, until the bottom stage face of described forwardly convex step forms spacing cooperation with described anti-breakdown spacing 4, this Time, expansion lobe 3 is expanded and enters in the bottom side recessed 103 cutting bottom outlet, completes to install.So, by above-mentioned band screw rod and propelling The power formula of mutually supporting of bar installs equipment 400, advances expansion pin by rotating screw thread, can automatically screw out after completing, and all are all counting Complete in Miao, very convenient, installation matrix will not be punctured, and the protrusion installation that outward displacement amount is caused can be eliminated when mounted Defect.

The foregoing is only specific embodiment of the utility model, but architectural feature of the present utility model is not limited to This, any those skilled in the art is in field of the present utility model, and change or the modification made all are contained in this practicality new Among the protection domain of type.

Claims (9)

1. a drill bit, including transmission drillstock, drilling rod, it is characterised in that described drill bit also includes the annular protrusion at drilling rod rear portion Position, annular element, wave oriented side boring mechanism, bore boring dual-purpose blade head；It is oblique that described annular protrusion position arranges notch direction Under annular joint groove；Described annular element is provided with and annular joint groove corresponding ring arc ball and socket joint, and described annular element leads to Cross ring arc ball and socket joint to be enclosed within outside annular protrusion position, with shock absorbing drilling depth position limiting structure bottom described annular element, described Ring arc ball and socket joint internal diameter less than notch external diameter above the groove of joint；The described side boring detent mechanism that waves includes being located at described joint Centre between groove bottom and the cutoff edge top, side boring boring dual-purpose blade head is waved supporting part and is in centre and waves support Necking part above portion, drilling rod waves supporting part to the interlude diameter of necking part and is gradually reduced from centre；On described drilling rod from Bore boring dual-purpose blade head and be provided with counter-clockwise helical chip area between drilling rod to joint groove；

The generally rod iron that described drilling rod and drillstock are constituted enters clapper die spotting press and carries out matched moulds forge hot pressure or heat stamping and shaping.

2. a kind of drill bit as claimed in claim 1, it is characterised in that described counter-clockwise helical chip area is connected by skewed slot, translot Completing, the head and the tail of translot are all connected to skewed slot, and described drilling rod arranges blade groove, and blade groove connects with skewed slot.

3. a kind of drill bit as claimed in claim 1, it is characterised in that be provided with gold between described ring arc ball and socket joint and joint groove Belonging to elastic latch fitting, described metallic elastic latch fitting has bottom, described bottom and described joint groove and conflicts and obtain support, described gold Belonging to elastic latch fitting and also have side support part in the both sides of bottom, the side support part of both sides and the upper and lower of ball and socket joint connect Touch and make ball and socket joint obtain and support.

4. a kind of drill bit as claimed in claim 3, it is characterised in that described metallic elastic latch fitting is ring set structure, and at ring set There is in structure the cannelure forming the notch of described bottom and side support part obliquely.

5. a kind of drill bit as claimed in claim 1, it is characterised in that the bottom of described annular element is provided with for flexible anti-shock pad The groove inserted, described shock absorbing drilling depth position limiting structure uses flexible anti-shock pad, by the notch extruding handle to flexible anti-shock pad Flexible anti-shock pad lock jail, or be glued.

6. drill bit as claimed in claim 1 a kind of, it is characterised in that described drilling rod is at the lower section of protruding parts and necking part It is arranged over processing the cutter of aperture limited step.

7. a kind of drill bit as claimed in claim 1, it is characterised in that described brill boring dual-purpose blade head is that cross is overall, and it expands boring Side cutoff edge cross entirety epicone to tilt extend, be provided with location tip in the middle of its cross entirety；Described brill boring two Using blade head, the side cutoff edge length of its side bore hole is longer than boring blade.

8. a kind of drill bit as claimed in claim 1, it is characterised in that described drilling rod is divided into left and right configuration on the basis of spue line The first side and the second side, described counter-clockwise helical chip area has been connected by skewed slot, translot, described counter-clockwise helical chip area Passing to the second side with the form of described translot from the first side, described drilling rod also sets up blade groove, blade groove connects with skewed slot；The Side and the described blade groove of the second side, translot, the grooved of skewed slot respectively meet and require to the first side and the second side demoulding Grooved.

9. a kind of drill bit as claimed in claim 7, it is characterised in that before the clockwise direction of the side cutoff edge of described expansion boring Side is provided with and guarantees to expand smoothly the expansion boring of boring and chip removal and help and cut room.