CN204024478U - A kind of bottom expanding drill - Google Patents
A kind of bottom expanding drill Download PDFInfo
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- CN204024478U CN204024478U CN201420474911.3U CN201420474911U CN204024478U CN 204024478 U CN204024478 U CN 204024478U CN 201420474911 U CN201420474911 U CN 201420474911U CN 204024478 U CN204024478 U CN 204024478U
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Abstract
A kind of bottom expanding drill, comprise drill bushing, drilling rod and power transmission shaft, described drilling rod comprises two brill bars that are hinged, described brill bar comprises insertion section, be located at the described fixed part of one end, described insertion section and be located at the described reamer of the described insertion section other end, described fixed part is connected with one end of power transmission shaft, described power transmission shaft drives two described brill bars along articulated section, mutually to intersect dislocation to make two described reamer mutually intersect dislocation, and the other end of described power transmission shaft is connected with external impetus mechanism.The bottom expanding drill providing according to the utility model compared with prior art tool has the following advantages: the utility model adopts two hinged brill bars as drilling rod cleverly, and by power transmission shaft, drive two described brill bars mutually to intersect dislocation along jointed shaft and make two reamer mutually intersect dislocation, while rotating, reach the effect of reaming in required hole of carrying out reaming; Two reamer dislocation and recover flexible while adopting the drilling rod of this kind of structure to carry out reaming, failure rate is low, plug is convenient.
Description
Technical field
The utility model relates to a kind of bottom expanding drill.
Background technology
At present, along with expanding a large amount of uses of end crab-bolt, the best implementation method that expands end crab-bolt is that the bottom internal diameter of fixing hole is expanded, make the bottom internal diameter of fixing hole be greater than aperture, when expanding crab-bolt bottom, the end, there is mechanical deformation like this, make the bottom external diameter that expands end crab-bolt be greater than aperture, expand like this end crab-bolt with regard to firm being fixed in fixing hole.It is comparatively complicated that this kind expands getting out of end fixing hole, generally first adopts common drill bushing punching, then uses bottom expanding drill, and reaming is carried out in bottom, hole or middle part; Existing bottom expanding drill comprises drilling rod, the expanding mechanism of drill rod end or inwall is set, and has drilling rod to promote expanding mechanism expansion, or drilling rod is hollow structure, by the push rod in drilling rod inner chamber or wire drawing, expanding mechanism is expanded.
As the utility model patent of China Patent No. CN90219686.3, the day for announcing is on 06 12nd, 1991, disclosed a kind of rock borehole-enlarging drilling tool, it is characterized in that upper end has the upper brill shell of drilling rod connector, in the inner, back-moving spring is loaded in the cavity between piston and lower brill shell piston dress, and the upper end of piston fork arm is connected with piston by nut, lower end is connected with symmetrically arranged cutter trousers by bearing pin, and the handle of a knife that is inlaid with carbide bit is put into respectively in cutter trousers and fixes with screw; Knife pants door is contained in the corresponding site of lower brill shell both-side opening, and bedplate is contained in the lower end of lower brill shell.Although can completing in hole, this technical scheme expands at the end, its complex structure, and the fixing hole internal diameter that expand the end must be greater than brill shell, and this will make to reduce piston fork arm external diameter, bad mechanical strength; During use, cutter trousers stretch out from boring shell both-side opening, opening is crossed senior general and is caused cutter trousers easily in opening, to rock in rotation process, affect reaming efficiency and reaming effect, too small openings, once cutter trousers deform in reaming process, cutter trousers cannot retraction opening in, this mechanism cannot extract in hole, poor for applicability.
The utility model patent of China Patent No. CN201120151632.X and for example, the day for announcing is on November 09th, 2011, disclosed a kind of square piston formula anchoring borehole-enlarging drilling tool, comprise drill pipe nipple, drill bit and telescopic arm, the upper end of described drill pipe nipple is connected with external borer drill rod, described telescopic arm comprises upper arm and underarm, the lower end outer wall of described upper arm one end and described piston bush is hinged, one end of the other end and described underarm is hinged, the other end of described underarm and described drill bit are hinged, it is characterized in that: also comprise piston bush, the axis of the piston and spring, in described piston bush, be provided with axial piston channel, the lower end build-in of described drill pipe nipple is in described piston bush, described spring housing is loaded in described piston channel, the upper end slip cap of described the axis of the piston is loaded in described piston channel and props up described spring, the other end is connected with described drill bit, described upper arm is yoke plate, and described underarm is blade.Although can completing in hole, this technical scheme expands at the end.But there is equally following defect: during reaming, piston bush moves down hinged upper arm and underarm are expanded outwardly, and carries out reaming, upper arm and the stressed maximum in articulated section underarm in reaming process, jointed shaft is fragile, poor durability; And yielding this of upper arm and underarm will cause upper arm and underarm after expansion to playback, and this mechanism cannot extract smoothly in hole; Or card has chip inside the upper arm after expansion and underarm, also will cause upper arm and underarm after expansion to playback, this mechanism cannot extract smoothly in hole, and reaming efficiency is lower.
Utility model content
Technical problem to be solved in the utility model is to overcome the deficiency of above-mentioned prior art, provides a kind of simple in structure, and plug is convenient, durable in use, the bottom expanding drill of failure rate is low.
The main technical schemes that the bottom expanding drill providing according to the utility model adopts is: comprise drill bushing, drilling rod and power transmission shaft, described drilling rod comprises two brill bars that are hinged, described brill bar comprises insertion section, be located at the fixed part and the reamer that is located at the described insertion section other end of one end, described insertion section, described reamer is positioned at described drill bushing outside, described fixed position is in described drill bushing, described fixed part is connected with one end of power transmission shaft, described power transmission shaft drives two described brill bars along articulated section, mutually to intersect dislocation to make two described reamer mutually intersect dislocation, the other end of described power transmission shaft is connected with external impetus mechanism.
The bottom expanding drill that the utility model provides also adopts following attached technical scheme:
The described fixed part of two described brill bars is hinged.
After two described brill bars are hinged, fit together two described in insertion section form bar insertion section, fit together two described in fixed part form bar fixed part, fit together two described in reamer form bar reamer; Two described brill bars intersect before dislocation, and the distance in the longitudinal projection of described bar reamer and between central point two points is farthest not more than in the longitudinal projection of described bar insertion section and the distance between central point two points farthest; Two described brill bars intersect after dislocation, and the distance in the longitudinal projection of described bar reamer and between central point two points is farthest greater than in the longitudinal projection of described bar insertion section and the distance between central point two points farthest.
The projection of described reamer and described insertion section is right-angled trapezium, and the upper base of two described right-angled trapezium is connected, and the vertical waist of two the described right-angled trapezium formation line part that is located along the same line, forms choke between the inclination waist of two described right-angled trapezium; One side of described brill bar is described line part, and the opposite side of described brill bar is choke; On two hinged described brill bars, one of them line part 36 that bores bar bores the choke of bar near another; Two described brill bars intersect after dislocation, one bore the line part 36 of bar and the inclination waist of the insertion section of another brill bar parallel or be positioned at same plane.
One end, two ends, bottom of described reamer is right angle end, other end acute ends, two described brill bars intersect before dislocation, right angle end in a reamer and the projection of acute ends are all positioned in another reamer, two described brill bars intersect after dislocation, the right angle end projection of a reamer is positioned in another reamer, and the acute ends projection in a reamer is positioned at outside another reamer.
Two relative sides of described brill bar fit tightly, or two relative sides of described brill bar partly fit tightly, symmetric figure centered by the cross section of two hinged described brill bars.
Described reamer is provided with Buddha's warrior attendant piece or diamond dust.
Described power transmission shaft is provided with driver slot, the inwall both sides of described driver slot are provided with guiding groove, the fixed part of described drilling rod inserts described driver slot, the outer wall of described brill bar is provided with the slide block coordinating with described guiding groove, and described guiding groove is guided described slide block makes two described brill bars intersect and misplace along described articulated section.
In described drill bushing, be provided with center, described center is mobilizable to be arranged in described drill bushing, and described center is provided with mesopore, and two described brill bars intert in described mesopore, and are hinged in described center by jointed shaft.
Described power transmission shaft is provided with the first annular and leans portion, described center is provided with the second circular top relying part, described driver slot outside is set with back-moving spring, and one end of described back-moving spring leans described the first annular and leans portion, and the other end of described back-moving spring leans described the second circular top relying part.
Described center is provided with two fixture blocks, a described fixture block is positioned at a side of described drilling rod, described in another, fixture block is positioned at the opposite side of described drilling rod, between two described fixture blocks and two described brill bars, be parallel to each other, described fixture block inserts described driver slot, the recline inwall both sides of described driver slot, the both sides of described fixture block.
Described drill bushing comprises cover and traps, described upper cover and under put the flange being equipped with for being connected and fixed.
Described brill bar is provided with screwed hole, and described slide block is provided with threaded column, and described threaded column coordinates with described screwed hole.
Slide block on a described brill bar is two, and the line between two described slide block geometric centers and the angle between described drilling rod center line are 1 degree-4 degree.
On described power transmission shaft, be set with inner sleeve, described inner sleeve comprises and is positioned at the lower inner sleeve of described drill bushing and is installed on the upper inner sleeve on described drill bushing, and described upper inner sleeve is connected with described lower inner sleeve, puts in described and is set with bearing.
In described center, be set with bearing or axle sleeve.
In two described brill bars, a brill bar is provided with inverted trapezoidal chute, another bores bar and is provided with inverted trapezoidal slide block, described inverted trapezoidal chute coordinates with described inverted trapezoidal slide block, described in state inverted trapezoidal chute and be positioned at two sides that described brill bar is relative with described inverted trapezoidal slide block.
Described reamer one end is connected with described insertion section, and the other end of described reamer is provided with aperture portion.
The bottom expanding drill providing according to the utility model compared with prior art tool has the following advantages: the utility model adopts two hinged brill bars as drilling rod cleverly, and by power transmission shaft, drive two described brill bars mutually to intersect dislocation along jointed shaft and make two reamer mutually intersect dislocation, while rotating, reach the effect of reaming in required hole of carrying out reaming; Two reamer dislocation and recover flexible while adopting the drilling rod of this kind of structure to carry out reaming, failure rate is low, plug is convenient, and the reamer mechanical strength of this structure is large, durable in use simultaneously; The utility model is simple in structure, parts are few, easy to assembly, design cost of production low.
Accompanying drawing explanation
Fig. 1 is structure chart of the present utility model.
Fig. 2 is two sectional views that brill bar intersects before dislocation mutually in the utility model.
Fig. 3 is two sectional views that brill bar intersects after dislocation mutually in the utility model.
Fig. 4 is STRUCTURE DECOMPOSITION figure of the present utility model.
Fig. 5 is the structure chart of power transmission shaft in the utility model.
Fig. 6 is the structure chart that bores bar in the utility model.
Fig. 7 is the structure chart that bores bar projection in the utility model.
Fig. 8 is that in the utility model, to bore Buddha's warrior attendant piece on bar be the front view of.
Fig. 9 is that in the utility model, to bore Buddha's warrior attendant piece on bar be the lateral view of.
Figure 10 is that in the utility model, to bore Buddha's warrior attendant piece on bar be front view a plurality of and that holddown groove is rectangular channel.
Figure 11 is that in the utility model, to bore Buddha's warrior attendant piece on bar be lateral view a plurality of and that holddown groove is rectangular channel.
Figure 12 is that in the utility model, to bore Buddha's warrior attendant piece on bar be front view a plurality of and that holddown groove is circular trough.
Figure 13 is that in the utility model, to bore Buddha's warrior attendant piece on bar be lateral view a plurality of and that holddown groove is circular trough.
Figure 14 bores the front view that bar is provided with Buddha's warrior attendant sand in the utility model.
Figure 15 bores the lateral view that bar is provided with Buddha's warrior attendant sand in the utility model.
The specific embodiment
Referring to Fig. 1 to Fig. 6, the bottom expanding drill embodiment providing according to the utility model, comprise drill bushing, drilling rod and power transmission shaft 2, described drilling rod comprises two brill bars 3 that are hinged, described brill bar 3 comprises insertion section 33, be located at the described fixed part 32 and the described reamer 31 that is located at described insertion section 33 other ends of 33 one end, described insertion section, described reamer 31 is positioned at described drill bushing outside, described fixed part 32 is positioned at described drill bushing, described fixed part 32 is connected with one end of power transmission shaft 2, two described brill bars 3 of described power transmission shaft 2 drivings intersect along articulated section to misplace mutually makes two described reamer 31 mutually intersect and misplace, the other end of described power transmission shaft 2 is connected with external impetus mechanism.Two brill bars 3 can be hinged by jointed shaft, and while adopting this kind of embodiment, above-mentioned articulated section refers to jointed shaft; Two are bored bars 3 and also can bore on bar 3 hinged projection is set at one, at another, bore and hinge hole is set on bar 3 realizes hingedly, and while adopting this kind of embodiment, above-mentioned articulated section refers to hinged projection or hinge hole.Two brill bars 3 in the present embodiment adopt jointed shafts hinged, and the fixed part 32 of described brill bar 3 is provided with hinge hole, and described jointed shaft is hinged by two described brill bars 3 through the hinge hole on two described brill bars 3.The utility model adopts two hinged brill bars 3 as drilling rod cleverly, and by power transmission shaft 2, drive two described brill bars 3 mutually to intersect dislocation along jointed shaft and make two reamer 31 mutually intersect dislocation, while rotating, reach the effect of reaming in required hole of carrying out reaming; Two reamer 31 dislocation and recover flexible while adopting the drilling rod of this kind of structure to carry out reaming, failure rate is low, plug is convenient, and reamer 31 mechanical strengths of this structure are large, durable in use simultaneously; The utility model is simple in structure, parts are few, easy to assembly, design cost of production low.
Referring to Fig. 1 to Fig. 6, according to the utility model the above embodiments, the described fixed part 32 of two described brill bars 3 is hinged.Bore bar 3 simple in structure, easy to process, by two these kinds, bore the hinged drilling rod forming of bar 3, mechanical strength is large, and two insertion sections 33 directly drive reamer 31 intersection dislocation interlock reamer 31 to rotate, and power transmission is reliable, failure rate is low, long service life.
Referring to Fig. 1 to Fig. 6, according to the utility model the above embodiments, after two described brill bars 3 are hinged, fit together two described in insertion section 33 form bar insertion sections, fit together two described in fixed part 32 form bar fixed parts, fit together two described in reamer 31 form bar reamer; Two described brill bars 3 intersect before dislocation, and the distance in the longitudinal projection of described bar reamer and between central point two points is farthest not more than in the longitudinal projection of described bar insertion section and the distance between central point two points farthest; Two described brill bars 3 intersect after dislocation, and the distance in the longitudinal projection of described bar reamer and between central point two points is farthest greater than in the longitudinal projection of described bar insertion section and the distance between central point two points farthest.Symmetric figure centered by the longitudinal projection of above-mentioned bar reamer; Symmetric figure centered by the longitudinal projection of above-mentioned bar insertion section; Ingenious part of the present utility model be in the longitudinal projection of bar insertion section 33 of drilling rod with central point two points farthest between distance can not intersect dislocation with two brill bars 3 and becomes greatly, meet the use standard of reaming bit completely; The drilling rod of this structure is compared with prior art simple in structure, and parts are little, and intersection dislocation and the recovery of two reamer 31 are flexible, and reaming efficiency is high.
Referring to Fig. 6 and Fig. 7, according to the utility model the above embodiments, the projection of described reamer 31 and described insertion section 33 is right-angled trapezium, the projection of described insertion section 33 and described reamer 31 is respectively right-angled trapezium E, F, upper base a, a ' of two described right-angled trapezium E, F is connected, vertical waist b, the b ' of two described right-angled trapezium E, F is located along the same line to form between inclination waist c, the c ' of line part 36, two described right-angled trapezium E, F and forms choke 37; One side of described brill bar 3 is described line part 36, and the opposite side of described brill bar 3 is choke 37; On two hinged described brill bars 3, one of them line part 36 that bores bar 3 bores the choke 37 of bar 3 near another; Two described brill bars 3 intersect after dislocation, one bore the line part 36 of bar 3 and the inclination waist of the insertion section 33 of another brill bar 3 parallel or be positioned at same plane.Above-mentioned projection all refers to transverse projection, bores bar 3 and adopts said structures to make the external diameter of the bar insertion section 33 in the utility model can not become large with the intersection dislocation of two brill bars 3, and structure is ingenious, and greatly, easily process, cost of production is low for mechanical strength.
Referring to Fig. 1 to Fig. 4 and Fig. 6, according to the utility model the above embodiments, one end, two ends, bottom of described reamer 31 is right angle end 311, other end acute ends 312, two described brill bars 3 intersect before dislocation, right angle end 311 in a reamer 31 and the projection of acute ends 312 are all positioned in another reamer 31, two described brill bars 3 intersect after dislocation, right angle end 311 projections of a reamer 31 are positioned in another reamer 31, and acute ends 312 projections in a reamer 31 are positioned at outside another reamer.When the utility model carries out reaming, reamer 31 acute ends 312 contact hole wall are cut and realizes reaming with hole wall.Along with the continuous propelling of power transmission shaft 2, impel the amplitude that two reamer 31 are intersected dislocation to become gradually greatly, the distance between two acute ends 312 of bar reamer 31 becomes greatly gradually, and the amplitude of reaming is also larger.
Referring to Fig. 1 to Fig. 4 and Fig. 6, according to the utility model the above embodiments, two relative sides of described brill bar 3 fit tightly, or two relative sides of described brill bar 3 partly fit tightly, symmetric figure centered by the cross section of two hinged described brill bars 3.Two are bored between bars 3 seamlessly, can not produce the phenomenon that snaps in foreign material or chip and cannot playback in reaming process, convenient reliable during use, failure rate is low, and reaming efficiency is high.
Referring to Fig. 6 and Fig. 8 to Figure 15, according to the utility model the above embodiments, described reamer 31 is provided with Buddha's warrior attendant piece 41 and/or diamond dust 42.Buddha's warrior attendant piece 41 or diamond dust 42 hardness are high, contribute to improve reaming efficiency of the present utility model, reduce the wearing and tearing of reamer 31.Buddha's warrior attendant piece 41 is located at acute ends 312 1 sides of reamer 31, and Buddha's warrior attendant sand 42 is located at reamer 31 except other surfaces of binding face.Described reamer 31 is provided with holddown groove, described Buddha's warrior attendant piece 4 partial insertion holddown grooves.Described holddown groove is one or more, and institute's Buddha's warrior attendant piece is one or more; Described holddown groove is rectangular channel or circular trough.
Referring to Fig. 2 to Fig. 5, according to the utility model the above embodiments, described power transmission shaft 2 is provided with driver slot 21, the inwall both sides of described driver slot 21 are provided with guiding groove 22, the other end of described drilling rod is positioned at described driver slot 21, the outer wall of described brill bar 3 is provided with the slide block 34 coordinating with described guiding groove 22, and the described slide block 34 of described guiding groove 22 guiding makes two described brill bars 3 intersect and misplace along described articulated section.Driver slot 21 is oppositely arranged and is formed by two drive blocks 23 that are provided with guiding groove 22.Guiding groove 22 on two drive blocks 23 is relative.Two guiding grooves 22 are strip and tilt at an angle with the center line of power transmission shaft 2, during concrete use, workman is by promoting forward power transmission shaft 2, driver slot 21 on power transmission shaft 2 is moved forward, the slide block 34 that the inwall of two guiding grooves 22 that tilt at an angle in driver slot 21 promotes to bore on bar 3 moves, and makes two to bore bar 3 along jointed shaft 51 intersection dislocation.Power transmission shaft 2 adopts said structure to drive two described brill bars 3 to intersect and misplace along jointed shaft 51, and simple in structure, parts are few, easy to assembly, and reliability is high.
Concrete production makes also can be provided with slide block in the inwall both sides of described driver slot, is provided with the guiding groove coordinating with described slide block on the outer wall of described brill bar 3, and described slide block is guided described guiding groove makes two described brill bars 3 intersect and misplace along described jointed shaft 51.
Referring to Fig. 2 to Fig. 4, according to the utility model the above embodiments, in described drill bushing, be provided with center 5, described center 5 is mobilizable to be arranged in described drill bushing, described center 5 is provided with mesopore 52, two described brill bars 3 intert in described mesopore 52, and are hinged in described center 1 by described jointed shaft 51.Brill bar 3 is hinged in center 5, makes to pass through center 1 mediate contact between jointed shaft 51 and drill bushing, drilling rod rotates more smooth and easy, and frictional resistance is little, and contributes to improve the efficiency of assembling that bores bar 3.
Referring to Fig. 2 to Fig. 5, according to the utility model the above embodiments, described power transmission shaft 2 is provided with the first annular and leans portion 24, described center 5 is provided with the second circular top relying part 53, described driver slot 21 outsides are set with back-moving spring 6, one end of described back-moving spring 6 leans described the first annular and leans portion 24, and the other end of described back-moving spring 6 leans described the second circular top relying part 53.The setting party of back-moving spring 6 intersect the reset that dislocation bores bar 3, when during use, user gets final product by external impetus mechanism urges power transmission shaft 2, reaming is carried out in two reamer 31 dislocation, after reaming, user stops propulsion power mechanism, two the brill bars 3 that misplace that intersect will reset under the effect of back-moving spring, very convenient during use; The user that is arranged so that of back-moving spring 6 can progressively strengthen thrust of the present utility model when reaming simultaneously, make the cutting scope of reamer 31 become gradually large, the cutting scope amplitude of variation within the unit interval that prevents reamer 31 is excessive, cause drilling rod damage or reamer 31 and the stuck phenomenon that cannot bore of hole wall, more safe and reliable during use.
Referring to Fig. 2 to Fig. 4, according to the utility model the above embodiments, described center 5 is provided with two fixture blocks 54, a described fixture block 54 is positioned at a side of described drilling rod, described in another, fixture block 54 is positioned at the opposite side of described drilling rod, between two described fixture blocks 54 and two described brill bars 3, be parallel to each other, described fixture block 54 inserts described driver slot 21, the recline inwall both sides of described driver slot 21, the both sides of described fixture block 54.This structure contributes to improve the bonding strength between drilling rod and power transmission shaft 2, and more safe and reliable during use, the life-span is long.
Referring to Fig. 2 to Fig. 4, according to the utility model the above embodiments, described drill bushing comprises cover 11 and traps 12, described upper cover 11 and trap on 12 and be equipped with the flange 13 for being connected and fixed.Flange 13 on upper cover 11 is connected with the flange 13 of trapping on 12.
Referring to Fig. 4, according to the utility model the above embodiments, described brill bar 3 is provided with screwed hole 35, and described slide block 34 is provided with threaded column 341, and described threaded column 341 coordinates with described screwed hole 35.Bore between bar 3 and slide block 34 and adopt said structure to connect, if slide block 34 damages, only the slide block damaging 34 need be changed, can not make whole brill bar 3 discarded, having reduced product is use cost, can not cause the wasting of resources.
Referring to Fig. 6, according to the utility model the above embodiments, the slide block 34 on a described brill bar 3 is two, and the line between two described slide block 34 geometric centers and the angle between described drilling rod center line are 1 degree-4 degree.The present embodiment is 2.35 degree preferably.
Referring to Fig. 2 to Fig. 4, according to the utility model the above embodiments, on described power transmission shaft 2, be set with inner sleeve, described inner sleeve comprises and is positioned at the lower inner sleeve 81 of described drill bushing and is installed on the upper inner sleeve 82 on described drill bushing, described upper inner sleeve 82 is connected with described lower inner sleeve 81, puts in described and is set with bearing 7.The inner sleeve of this kind of structure can be limited to permanent position by bearing 7, and bearing 7 can, because power transmission shaft 2 promotes drilling rod displacement, not reduce the damage to bearing 7 when product is used.
Referring to Fig. 2 to Fig. 4, according to the utility model the above embodiments, in described center 5, be set with bearing 7 or axle sleeve.Reduce the friction between center 5 and drill bushing, improve the application life of product.
According to the utility model the above embodiments, in two described brill bars 3, a brill bar 3 is provided with inverted trapezoidal chute, another bores bar 3 and is provided with inverted trapezoidal slide block, described inverted trapezoidal chute coordinates with described inverted trapezoidal slide block, described in state inverted trapezoidal chute and be positioned at two sides that described brill bar 3 is relative with described inverted trapezoidal slide block.This structure contributes to improve the mechanical strength of drilling rod, prevents that reamer 31 is subject to resistance and makes 3 of the brill bars of two laminatings produce gap and enter chip when cutting hole wall, or bores bar 3 generation influence of crust deformation reamings.
According to the utility model the above embodiments, described reamer 31 one end are connected with described insertion section 33, and the other end of described reamer 31 is provided with aperture portion.During concrete use, can first by aperture portion, hole, after by reamer 31, carry out reaming, the utility model will hole and hole expansion function integrated, the process of having removed replacing brill bar in use procedure from, is used convenient, cost-saving.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that in the situation that not departing from principle of the present utility model and spirit and can change these embodiment, scope of the present utility model is limited by claims and equivalent thereof.
Claims (18)
1. a bottom expanding drill, it is characterized in that: comprise drill bushing, drilling rod and power transmission shaft, described drilling rod comprises two brill bars that are hinged, described brill bar comprises insertion section, be located at the fixed part and the reamer that is located at the described insertion section other end of one end, described insertion section, described reamer is positioned at described drill bushing outside, described fixed position is in described drill bushing, described fixed part is connected with one end of power transmission shaft, described power transmission shaft drives two described brill bars along articulated section, mutually to intersect dislocation to make two described reamer mutually intersect dislocation, the other end of described power transmission shaft is connected with external impetus mechanism.
2. bottom expanding drill according to claim 1, is characterized in that: the described fixed part of two described brill bars is hinged.
3. bottom expanding drill according to claim 2, it is characterized in that: after two described brill bars are hinged, fit together two described in insertion section form bar insertion section, fit together two described in fixed part form bar fixed part, fit together two described in reamer form bar reamer; Two described brill bars intersect before dislocation, and the distance in the longitudinal projection of described bar reamer and between central point two points is farthest not more than in the longitudinal projection of described bar insertion section and the distance between central point two points farthest; Two described brill bars intersect after dislocation, and the distance in the longitudinal projection of described bar reamer and between central point two points is farthest greater than in the longitudinal projection of described bar insertion section and the distance between central point two points farthest.
4. bottom expanding drill according to claim 2, it is characterized in that: the projection of described reamer and described insertion section is right-angled trapezium, the upper base of two described right-angled trapezium is connected, the vertical waist of two the described right-angled trapezium formation line part that is located along the same line, forms choke between the inclination waist of two described right-angled trapezium; One side of described brill bar is described line part, and the opposite side of described brill bar is choke; On two hinged described brill bars, one of them line part that bores bar bores the choke of bar near another; Two described brill bars intersect after dislocation, one bore the line part of bar and the inclination waist of the insertion section of another brill bar parallel or be positioned at same plane.
5. bottom expanding drill according to claim 2, it is characterized in that: one end, two ends, bottom of described reamer is right angle end, other end acute ends, two described brill bars intersect before dislocation, right angle end in a reamer and the projection of acute ends are all positioned in another reamer, two described brill bars intersect after dislocation, and the right angle end projection of a reamer is positioned in another reamer, and the acute ends projection in a reamer is positioned at outside another reamer.
6. bottom expanding drill according to claim 2, is characterized in that: two relative sides of described brill bar fit tightly, or two relative sides of described brill bar partly fit tightly, symmetric figure centered by the cross section of two hinged described brill bars.
7. according to the bottom expanding drill described in claim 2-6 any one, it is characterized in that: described reamer is provided with Buddha's warrior attendant piece or diamond dust.
8. bottom expanding drill according to claim 1, it is characterized in that: described power transmission shaft is provided with driver slot, the inwall both sides of described driver slot are provided with guiding groove, the fixed part of described drilling rod inserts described driver slot, the outer wall of described brill bar is provided with the slide block coordinating with described guiding groove, and described guiding groove is guided described slide block makes two described brill bars intersect and misplace along described articulated section.
9. bottom expanding drill according to claim 8, it is characterized in that: in described drill bushing, be provided with center, described center is mobilizable to be arranged in described drill bushing, described center is provided with mesopore, two described brill bars intert in described mesopore, and are hinged in described center by jointed shaft.
10. bottom expanding drill according to claim 9, it is characterized in that: described power transmission shaft is provided with the first annular and leans portion, described center is provided with the second circular top relying part, described driver slot outside is set with back-moving spring, one end of described back-moving spring leans described the first annular and leans portion, and the other end of described back-moving spring leans described the second circular top relying part.
11. bottom expanding drills according to claim 9, it is characterized in that: described center is provided with two fixture blocks, a described fixture block is positioned at a side of described drilling rod, described in another, fixture block is positioned at the opposite side of described drilling rod, between two described fixture blocks and two described brill bars, be parallel to each other, described fixture block inserts described driver slot, the recline inwall both sides of described driver slot, the both sides of described fixture block.
Bottom expanding drill described in 12. according to Claim 8-11 any one, is characterized in that: described drill bushing comprises cover and trap, described upper cover and under put the flange being equipped with for being connected and fixed.
Bottom expanding drill described in 13. according to Claim 8-11 any one, is characterized in that: described brill bar is provided with screwed hole, and described slide block is provided with threaded column, and described threaded column coordinates with described screwed hole.
Bottom expanding drill described in 14. according to Claim 8-11 any one, is characterized in that: the slide block on a described brill bar is two, and the line between two described slide block geometric centers and the angle between described drilling rod center line are 1 degree-4 degree.
15. according to the bottom expanding drill described in claim 1-6 any one, it is characterized in that: on described power transmission shaft, be set with inner sleeve, described inner sleeve comprises and is positioned at the lower inner sleeve of described drill bushing and is installed on the upper inner sleeve on described drill bushing, described upper inner sleeve is connected with described lower inner sleeve, puts in described and is set with bearing.
16. according to the bottom expanding drill described in claim 9-11 any one, it is characterized in that: in described center, be set with bearing or axle sleeve.
17. according to the bottom expanding drill described in claim 1-6 any one, it is characterized in that: in two described brill bars, a brill bar is provided with inverted trapezoidal chute, another bores bar and is provided with inverted trapezoidal slide block, described inverted trapezoidal chute coordinates with described inverted trapezoidal slide block, described in state inverted trapezoidal chute and be positioned at two sides that described brill bar is relative with described inverted trapezoidal slide block.
18. according to the bottom expanding drill described in claim 1-6 any one, it is characterized in that: described reamer one end is connected with described insertion section, and the other end of described reamer is provided with aperture portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420474911.3U CN204024478U (en) | 2014-08-21 | 2014-08-21 | A kind of bottom expanding drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420474911.3U CN204024478U (en) | 2014-08-21 | 2014-08-21 | A kind of bottom expanding drill |
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| Publication Number | Publication Date |
|---|---|
| CN204024478U true CN204024478U (en) | 2014-12-17 |
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|---|---|---|---|
| CN201420474911.3U Expired - Fee Related CN204024478U (en) | 2014-08-21 | 2014-08-21 | A kind of bottom expanding drill |
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| Country | Link |
|---|---|
| CN (1) | CN204024478U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105178864A (en) * | 2015-09-29 | 2015-12-23 | 中煤第三建设（集团）有限责任公司 | Expanding bit |
-
2014
- 2014-08-21 CN CN201420474911.3U patent/CN204024478U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105178864A (en) * | 2015-09-29 | 2015-12-23 | 中煤第三建设（集团）有限责任公司 | Expanding bit |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 Termination date: 20160821 |
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