CN206200187U - A kind of square hole rig - Google Patents
A kind of square hole rig Download PDFInfo
- Publication number
- CN206200187U CN206200187U CN201621245826.5U CN201621245826U CN206200187U CN 206200187 U CN206200187 U CN 206200187U CN 201621245826 U CN201621245826 U CN 201621245826U CN 206200187 U CN206200187 U CN 206200187U
- Authority
- CN
- China
- Prior art keywords
- square hole
- drive rod
- lip river
- gore
- milling cutter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model belongs to tapping equipment technical field, it is related to a kind of square hole rig, including housing and drill bit, the drive rod connection that housing central section is installed, the lower end of drive rod is fixed with pilot bit, middle part and is provided with little gear, the outer sheath of little gear is equipped with Le Lip river gore, Lip river gore is strangled to be placed in the center square hole of guiding square frame, square frame is oriented to be fixed on housing, little gear and internal gear engaged transmission, the lower end for strangling Lip river gore is provided with hollow square hole milling cutter, and the lower end of pilot bit is located under the lower surface of square hole milling cutter, and advantage is：Directly drilled centering using pilot bit, and rapid operation, the accuracy of centering is high, and percent defective is low, strangles the guide frame and square hole milling cutter of Lip river triangle, the error for getting out square hole is small, and quality is high, and standard, noise is small, it is adaptable to which square hole is drilled.
Description
Technical field
The utility model belongs to tapping equipment technical field, refers in particular to a kind of square hole rig.
Background technology
The A of Chinese patent CN 105598502 are disclosed《A kind of device of opening square hole》, including fixed frame, it is in fixed frame
Foursquare hole, the corner in hole is round-corner transition, is equipped with guide holder in fixed frame, guide holder by one block of equilateral triangle plate and
Three pieces of cambered plate compositions, cambered plate is minor arc bow, the side cooperation of every piece of string of cambered plate and equilateral triangle plate, triangular plate and bow
Shape plate is structure as a whole；The one side of fixed frame installs support frame, and rotating driving device is installed on support frame, rotating driving device
Output shaft connects one end of displacement universal joint, and the other end connection connecting shaft of displacement universal joint, connecting shaft is connected with tool rest, is oriented to
The circle centre position of the inscribed circle of the equilateral triangle plate of seat opens up mating holes, and connecting shaft passes through mating holes, and connecting shaft coordinates with mating holes
And will not relatively rotate；Tool rest coordinates with guide holder, and tool rest is provided with least one cutter head, each cutter head correspondence guide holder one
Individual angle, cutter head tip and the corresponding angle of guide holder straight line perpendicular to guide holder plate；Tool rest is located at the another of fixed frame
Face, opens up at least four through holes in the framework of fixed frame, pass through the periphery of a guide post, guide post to set bullet in each through hole
Spring, spring is located at the another side of fixed frame；Described connecting shaft is hexagon prism, and mating holes is hexagon ring.Described guide holder
Periphery sets several rollers, and the inwall of fixed frame opens up the groove coordinated with roller.The end of described guide post is installed by sucker.
Described cutter head is three, and reinforced seat is set on tool rest.Described support frame is made up of two triangle support frames, triangle branch
Two angles of support are fixedly connected with fixed frame, and the 3rd angle of triangle support frame is connected with rotating driving device.Described
Fixed frame is provided with a circle organ pipe, and tool rest is located in organ pipe, and fixed frame, fixed frame and guide post are installed in the end of organ pipe
End be fixedly connected.
It is disadvantageous in that：One be minor arc bow radius if not if the length of side of triangular plate, being hardly formed Le Luo
Triangle, can produce transmission to interfere or be difficult to get out square hole；Two is that drive device connects connecting shaft and knife by displacement universal joint
Head, the cutter head because described in makes universal joint also and then be servo-actuated beat at cutting Shi Qi centers in the bounce of horizontal beat, by displacement ten thousand
Axial feed is undertaken again while rotation to section connection, is violated universal joint and is applied to transmission torsion and is not suitable for transmission
Axial force this transmission general knowledge；Three be using guide post and sucker carry out guide-localization substantially can rigidly not enough, by being intended to bore
Cut that the rough suction for making sucker of subject surface is small, be not enough to the horizontal beat active force for overcoming cutter head to be produced when cutting, inhale
Disk is easily translated, and is caused positioning inaccurate and actually can not effectively be got out square hole；Therefore, the drive mechanism of the program is unreasonable,
Job Operations are poor, and positioning rigidity is not enough, and practicality is not high, it is impossible to produce positive effect.
The content of the invention
The purpose of this utility model is to provide a kind of low production cost, accurate positioning, the square auger of the square hole standard for getting out
Machine.
What the purpose of this utility model was realized in：
A kind of square hole rig, including housing and drill bit, described drill bit are the pilot bit of tip, what housing central section was installed
The lower end of drive rod is coaxial to be fixed with described pilot bit, and the little gear with external tooth, small tooth are provided with the middle part of drive rod
The outer sheath of wheel is strangled Lip river gore and is placed in the square opening of guiding square frame equipped with the Le Lip river gore with internal gear,
The corner of square opening is arc transition, is oriented to square frame and is fixed on housing, the axle center of little gear and the center superposition for being oriented to square frame,
The reference diameter of internal gear is more than the reference diameter of little gear, little gear and internal gear engaged transmission, strangles Lip river gore
Three summits between line constitute equilateral triangle, square opening opposite side distance be equal to equilateral triangle the length of side, Le Luo
The lower end of gore is provided with hollow square hole milling cutter, and pilot bit is through square hole milling cutter and its apex point position side of exposing downwards
The cutting end face of hole milling cutter.
The concrete structure that the lower end of above-mentioned drive rod is coaxially fixed with pilot bit is：The lower end of drive rod is coaxially disposed
There is the step groove with vertically oriented face, described pilot bit is plugged in step groove and is fixed by screw rod or pin and connected
Connect；Or internal thread is provided with the cylindrical groove that is centrally located of the lower end of drive rod, on pilot bit is screwed onto in screw thread.
Above-mentioned square hole milling cutter is fixed in the connecting tube that the lower end of Le Lip river gore extends downwardly from and solid by pin
Fixed connection.
Through hole is provided with the middle part of above-mentioned square hole milling cutter, described drive rod and the pilot bit for connecting thereon are located at logical
Within hole.
Three cutting blades, three points of cutting blade are laid with the lower surface of above-mentioned square hole milling cutter and lateral surface
Line between angle constitutes equilateral triangle.
Above-mentioned drive rod and little gear are integral type structure or split-type structural, the drive rod of split-type structural and small tooth
Wheel is fixedly connected.
The axis of above-mentioned internal gear and the center superposition for strangling Lip river gore；Described internal gear is integrally formed is strangling Lip river
On the hollow inner circle hole wall of gore；Or described internal gear is split-type structural, split type knot with Lip river gore is strangled
The internal gear of structure is fixedly connected on the hollow inner circle hole wall for strangling Lip river gore.
The rotational circle cone angle of the cutting edge of above-mentioned pilot bit is less than or equal to 170 degree；Or described pilot bit
Cutting edge rotational circle cone angle be less than or equal to 120 degree.
Slid axially on the downside of above-mentioned housing and be provided with protective cover, upside and be connected with holding handle, be provided with protective cover
With the limited block that housing coordinates limitation drilling depth, position of the limited block on protective cover can by screw member or pin member
Adjust, the spring for protective cover being held out against and being put in lowermost position is provided between the housing lower surface and limited block on the inside of protective cover, feel relieved
Drill bit and square hole milling cutter are located at the inner side of protective cover.
The top of above-mentioned housing is fixed with motor or air motor or hydraulic motor, motor or air motor or hydraulic pressure horse
The output shaft for reaching is that drive rod or the output shaft of motor or air motor or hydraulic motor are fixedly connected with the upper end of drive rod.
The utility model is prominent and beneficial compared to existing technology to be had the technical effect that：
1st, the utility model due to using standard Le Lip river triangle guide frame and square hole milling cutter, due to using double-pole
Tool independently cuts, and cutting resistance is small, and the error for getting out square hole is small, and quality is high, standard.
2nd, the utility model is effectively overcome using the drilling centering of pilot bit elder generation, and rear square hole milling cutter follow-up milling square hole
The horizontal beat active force that square hole milling cutter is produced in cutting, positioning rigidity foot, rapid operation, the accuracy of centering is high, gives up
Product rate is low.
3rd, it is to strangle Lip river gore that the utility model drives the internal gear being oriented in square frame using the little gear on drive rod
Rotate, and then drive square hole milling cutter to drill square hole, gear-driven reliability is high, transmission torsion is big, the efficiency high of drilling square hole.
4th, protective cover of the present utility model not only can block and collect the scrap for getting out, and prevent the square hole milling cutter for rotating to hinder
People, limited block on protective cover can effective keyhole depth, and limited block is adjusted by screw member or pin member
Spacing height both drilling depth.
5th, simple structure of the present utility model, positioning is reliable accurate, and easy to operate, square hole standard, the unification for being got out is raw
Low cost is produced, production efficiency is high, it is adaptable to which square hole is drilled.
Brief description of the drawings
Fig. 1 is partial sectional view of the present utility model.
Fig. 2 is upward view of the present utility model.
Fig. 3 is A-A of the present utility model to sectional view.
Fig. 4 is the partial sectional view of drive rod of the present utility model.
Fig. 5 is the sectional view after the utility model removes protective cover and spring.
Fig. 6 is the partial sectional view of square hole milling cutter of the present utility model.
Fig. 7 is the upward view of square hole milling cutter of the present utility model.
Fig. 8 is the top view of square hole milling cutter of the present utility model.
Fig. 9 is the formation basic theory schematic diagram for strangling Lip river triangle.
Specific embodiment
The utility model is further described with specific embodiment below in conjunction with the accompanying drawings, referring to Fig. 1-Fig. 9：
A kind of square hole rig, including housing 21 and drill bit, described drill bit are the pilot bit 20 of tip, the middle part of housing 21
The drive rod 11 of installation is supported on housing 21 by bearing 23, and the lower end of drive rod 11 is coaxial to be fixed with described pilot bit
20, the middle part of drive rod 11 is provided with the little gear 22 with external tooth, and the outer sheath of little gear 22 is equipped with internal gear 12
Lip river gore 14 (outline of described Le Lip river gore 14 claims to strangle Lip river gore 14 to strangle Lip river triangle) is strangled,
Strangle Lip river gore 14 to be placed in the square hole 131 of guiding square frame 13, the corner of square hole 131 is arc transition, is oriented to square frame 13
It is fixed on housing 21, the axle center of little gear 22 is more than with the center superposition for being oriented to square frame 13, the reference diameter of internal gear 12
The reference diameter of little gear 22, little gear 22 and the engaged transmission of internal gear 12, between three summits of Le Lip river gore 14
Line 33 constitute equilateral triangle, the opposite side of square opening be equal to apart from L2 equilateral triangle length of side L1 (every line 33
Length), the lower end for strangling Lip river gore 14 is provided with hollow 183 square hole milling cutter 18, and pilot bit 20 passes through square hole milling cutter 18
And its apex point position is exposed and higher than the cutting end face of square hole milling cutter 18, square hole milling cutter 18 is outside being provided with handle of a knife in other words
End has three uniform cutting blades 181 of the circumference of wedge angle 182 to form square hole milling cutter 18, three wedge angles of cutting blade 181 182
Between line 184 constitute equilateral triangle, the lower end of pilot bit 20 is located under the lower surface 185 of cutting blade 181, with
After ensuring that the part of pilot bit 20 pierces and can play a part of positioning in object, three cutting blades 181 of square hole milling cutter 18
The cutting of square hole being carried out again or being drilled, described square hole milling cutter 18, the cutting edge of pilot bit 20 is with wolfram steel or diamond dust system
Into, be particularly well-suited to drill harder metal, cement wall or stone material, described square hole milling cutter 18, pilot bit 20 according to
Solid center bit, then can drill square hole or square groove on timber.
The concrete structure that the lower end of above-mentioned drive rod 11 is coaxially fixed with pilot bit 20 is：The lower end of drive rod 11 is same
Axle is provided with the step groove 111 with vertically oriented face, and described pilot bit 20 is plugged in step groove 111 and by screw rod
Or pin is fixedly connected；Or internal thread is provided with the cylindrical groove that is centrally located of the lower end of drive rod 11, pilot bit 20 is spirally connected
On in the screw thread.
Above-mentioned square hole milling cutter 18 is fixed in the connecting tube 131 that the lower end of Le Lip river gore 14 extends downwardly from and passes through
Pin 24 is fixedly connected.
The middle part of above-mentioned square hole milling cutter 18 is provided with through hole 183, described drive rod 11 and the pilot drill for connecting thereon
First 18 are located within through hole 183.
The lower end of above-mentioned pilot bit 20 is located on the lower surface 185 of cutting blade 181 and lateral surface and is laid with three
Cutting blade, the line between three wedge angles of cutting blade constitutes equilateral triangle.
Above-mentioned drive rod 11 is integral type structure or split-type structural, the drive rod 11 of split-type structural with little gear 22
It is fixedly connected with little gear 22.
The axis of above-mentioned internal gear 12 and the center superposition for strangling Lip river gore 14；Internal gear 12 is integrally formed is strangling Lip river
On the inner circle hole wall of hollow the 141 of gore 14；Or described internal gear 12 is split-type structural with Lip river gore 14 is strangled,
The internal gear 12 of split-type structural is fixedly connected on the hollow inner circle hole wall for strangling Lip river gore 14.
The rotational circle cone angle B of the cutting edge of above-mentioned pilot bit 20 is less than or equal to 170 degree；Or described pilot drill
The rotational circle cone angle of the cutting edge of head is less than or equal to 120 degree.
The downside of above-mentioned housing 21 slide axially be provided with protective cover 15, upside be connected with holding handle 10, protective cover 15
On be provided with housing 21 coordinate limitation drilling depth limited block 17, position of the limited block 17 on protective cover 15 pass through screw thread
Component or pin member are adjustable (being not drawn into figure), are provided between the lower surface of housing 21 of the inner side of protective cover 15 and limited block 17
Protective cover 15 is held out against the spring 16 put in lowermost position, pilot bit 20 and square hole milling cutter 18 are located at the inner side of protective cover 15, prevent
The lower surface of shield 15 flushes with the lower surface 185 of cutting blade 181.
The top of above-mentioned housing 21 is fixed with motor or air motor or hydraulic motor, motor or air motor or hydraulic pressure
The output shaft of motor is fixed for the output shaft of drive rod 11 or motor or air motor or hydraulic motor with the upper end of drive rod 11
Connection.
Described Le Lip river triangle (referring to Fig. 9), is with each summit of equilateral triangle as the center of circle, with equilateral triangle side
L long makees one section of arc 30 for radius R between another two summit, and the curved line trangle that three sections of arcs 30 are surrounded is exactly to strangle Lip river triangle
(reuleaux triangle) (curved line trangle that heavy line is surrounded in Fig. 9), also referred to as reuleaux triangle；Strangling Lip river triangle is
Typical curve of constant breadth；The width for strangling Lip river triangle is equal to the length of side of construction equilateral triangle；It is in the length of side when Lip river triangle is strangled
In the square hole of its width during rotation, the track that each angle is passed by is basically the pros with the excessive angle of circular arc
Shape.
It is of the present utility model to use：To be connected with the mains or source of the gas as the motor or air driven pump of power, hold square hole rig
Holding handle 10, pilot bit 20 is placed on the center of square hole to be bored, startup power supply or source of the gas, power drives drive rod
11 and then drive pilot bit 20 part to creep into object to be drilled, positioned with the center to square hole to be bored, continue to hold
To object pressuring direction to be drilled, drive rod 11 drives little gear 22 to rotate to the holding handle 10 of square hole rig, and little gear 22 drives
Internal gear 12 had both been strangled Lip river gore 14 and had been rotated, and in the case where the limitation of square frame 13 is oriented to, strangled three wedge angle edges of Lip river gore 14
The square hole motion at the middle part of square frame 13 is oriented to, the movement locus of three wedge angles of cutting blade 181 182 of square hole milling cutter 18 is also
Square, the hole as square hole that three cutting blades 181 cut, because pilot bit 20 takes the lead in piercing square hole to be bored
Drilling depth plays preferable positioning action less than the drilling depth of square hole milling cutter 18, therefore, hold the holding handle of square hole rig
10 so that square hole milling cutter 18 is easy to get out square hole；During work, pilot bit 20 is done from transhipment by the center of circle of the axle center of drive rod
Dynamic, square hole milling cutter 18 does revolution motion while rotation is done around drive rod, actually strangles Lip river gore 14 and square hole milling
The movement locus of knife 18 is synchronous rolling rotation；Certainly the size for boring square hole is defined by the width of square hole milling cutter 18, can
So that according to the square hole milling cutter 18 that different in width is changed the need for getting out square hole size, the square hole milling cutter 18 in the present embodiment is introduced
Cutting edge be that three decile cutting edges are optimization designs for cutting effect, it is actual with single or two knives of 120 degree of angle
Sword can also realize the milling of square hole.
Above-described embodiment is only preferred embodiment of the present utility model, and protection model of the present utility model is not limited according to this
Enclose, therefore：All equivalence changes done according to structure of the present utility model, shape, principle, all should be covered by protection of the present utility model
Within the scope of.
Claims (10)
1. a kind of square hole rig, including housing and drill bit, it is characterised in that：Described drill bit is the pilot bit of tip, housing
The lower end of the drive rod that middle part is installed is coaxial to be fixed with described pilot bit, is provided with the small of external tooth in the middle part of drive rod
Gear, the outer sheath of little gear strangles Lip river gore and is placed on guiding square frame equipped with the Le Lip river gore with internal gear
In square opening, the corner of square opening is arc transition, is oriented to square frame and is fixed on housing, axle center and the guiding square frame of little gear
Center superposition, the reference diameter of the reference diameter more than little gear of internal gear, little gear and internal gear engaged transmission, Le Luo
Line between three summits of gore constitutes equilateral triangle, and the opposite side distance of square opening is equal to the side of equilateral triangle
Long, the lower end for strangling Lip river gore is provided with hollow square hole milling cutter, pilot bit through square hole milling cutter and its apex point position to
Under expose the cutting end face of square hole milling cutter.
2. a kind of square hole rig according to claim 1, it is characterised in that：The lower end of described drive rod is coaxially fixed with
The concrete structure of pilot bit is：The lower end of drive rod is coaxially arranged with the step groove with vertically oriented face, described centering
Drill bit is plugged in step groove and is fixedly connected by screw rod or pin；Or set on the cylindrical groove that is centrally located of the lower end of drive rod
Internal thread is equipped with, on pilot bit is screwed onto in screw thread.
3. a kind of square hole rig according to claim 1, it is characterised in that：Described square hole milling cutter is fixed on Le Lip river triangle
It is fixedly connected in the connecting tube that the lower end of shape block extends downwardly from and by pin.
4. a kind of square hole rig according to claim 1, it is characterised in that：It is provided with the middle part of described square hole milling cutter logical
Hole, described drive rod and the pilot bit for connecting thereon are located within through hole.
5. a kind of square hole rig according to claim 1, it is characterised in that：The lower surface and outside of described square hole milling cutter
Three cutting blades are laid with face, the line between three wedge angles of cutting blade constitutes equilateral triangle.
6. a kind of square hole rig according to claim 1, it is characterised in that：Described drive rod is integral type with little gear
Structure or split-type structural, the drive rod of split-type structural are fixedly connected with little gear.
7. a kind of square hole rig according to claim 1, it is characterised in that：The axis of described internal gear and Le Lip river triangle
The center superposition of shape block, described internal gear is integrally formed on the hollow inner circle hole wall for strangling Lip river gore；Or it is described
Internal gear is split-type structural with Lip river gore is strangled, and the internal gear of split-type structural is fixedly connected in Le Lip river gore
On empty inner circle hole wall.
8. a kind of square hole rig according to claim 1, it is characterised in that：The rotation of the cutting edge of described pilot bit
Turn coning angle less than or equal to 170 degree；Or the rotational circle cone angle of the cutting edge of described pilot bit is less than or equal to 120
Degree.
9. a kind of square hole rig according to claim 1, it is characterised in that：Slide axially setting on the downside of described housing
There are protective cover, upside to be connected with holding handle, the limited block for coordinating limitation drilling depth with housing, limited block are provided with protective cover
Position on protective cover is adjustable by screw member or pin member, between the housing lower surface and limited block on the inside of protective cover
The spring for protective cover being held out against and being put in lowermost position is provided with, pilot bit and square hole milling cutter are located at the inner side of protective cover.
10. a kind of square hole rig according to claim any one of 1-9, it is characterised in that：The top of described housing is consolidated
Surely have motor or air motor or a hydraulic motor, the output shaft of motor or air motor or hydraulic motor for drive rod or motor or
The output shaft of air motor or hydraulic motor is fixedly connected with the upper end of drive rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621245826.5U CN206200187U (en) | 2016-11-21 | 2016-11-21 | A kind of square hole rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621245826.5U CN206200187U (en) | 2016-11-21 | 2016-11-21 | A kind of square hole rig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206200187U true CN206200187U (en) | 2017-05-31 |
Family
ID=58749597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621245826.5U Withdrawn - After Issue CN206200187U (en) | 2016-11-21 | 2016-11-21 | A kind of square hole rig |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206200187U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106424833A (en) * | 2016-11-21 | 2017-02-22 | 马文强 | Square hole drilling machine |
| CN107143629A (en) * | 2017-06-30 | 2017-09-08 | 宝鸡银康机械设备有限公司 | Based on the vertical cam mechanism of garlic mashing machine for strangling Lip river triangle |
| CN110654148A (en) * | 2019-10-17 | 2020-01-07 | 商丘工学院 | Equipment for drawing square electrical appliance spare and accessory part picture |
| CN114178579A (en) * | 2022-01-04 | 2022-03-15 | 晟民建设有限公司 | Drilling device for road and bridge engineering |
-
2016
- 2016-11-21 CN CN201621245826.5U patent/CN206200187U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106424833A (en) * | 2016-11-21 | 2017-02-22 | 马文强 | Square hole drilling machine |
| CN106424833B (en) * | 2016-11-21 | 2018-09-11 | 马文强 | A kind of square hole drilling machine |
| CN107143629A (en) * | 2017-06-30 | 2017-09-08 | 宝鸡银康机械设备有限公司 | Based on the vertical cam mechanism of garlic mashing machine for strangling Lip river triangle |
| CN110654148A (en) * | 2019-10-17 | 2020-01-07 | 商丘工学院 | Equipment for drawing square electrical appliance spare and accessory part picture |
| CN114178579A (en) * | 2022-01-04 | 2022-03-15 | 晟民建设有限公司 | Drilling device for road and bridge engineering |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106424833B (en) | A kind of square hole drilling machine | |
| CN206200187U (en) | A kind of square hole rig | |
| CN105863512B (en) | The broken soft seam ladder of underground coal mine is with the compound directional drilling hole-forming device of pipe and method | |
| CN107584160B (en) | Drill bit with dust collection function | |
| CN201763241U (en) | Bushing & drilling-in dual purpose drilling machine | |
| CN213902920U (en) | Drilling sampling device for bridge construction acceptance check | |
| CN203742454U (en) | Reaming cutting head of blind raise boring machine | |
| CN205445474U (en) | PDC (polycrystalline diamond compact) drilling bit | |
| CN208203133U (en) | A kind of rotary digging cutter barrel brill | |
| CN209067208U (en) | Casing guide type is oriented to spiral push pipe drilling machine | |
| CN201714317U (en) | Down-the-hole drilling rig centering device | |
| CN217327319U (en) | Guide drill bit of accurate rectifying | |
| CN104923857B (en) | A kind of application method of square hole drilling rig | |
| CN2816323Y (en) | Concrete foundation high-precision level boring device | |
| CN212958458U (en) | Mechanical rotation guiding drilling tool | |
| CN206812062U (en) | A kind of elastic gum wing topping machanism of oil steering tool centralizer | |
| CN114018631A (en) | Core drilling machine for wood structure in historic building wall and sampling method | |
| CN2462066Y (en) | Single gear wheel-fixed cutter composite drill bit | |
| CN220645809U (en) | Core drilling tool of rock core taking machine | |
| CN208060193U (en) | A kind of geologic prospect sampler | |
| CN206503561U (en) | A kind of drill bit for geotechnical boring | |
| CN204800073U (en) | Square hole drilling tool device | |
| CN110242211A (en) | Rectangle drilling drilling apparatus and boring method based on fan-shaped drill bit | |
| CN112096293B (en) | Variable-diameter drill bit for oil field drilling | |
| CN207315239U (en) | One kind regeneration hard alloy straight fluted drill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170531 Effective date of abandoning: 20180911 |
|
| AV01 | Patent right actively abandoned |