CN103291221A - Roller bit and manufacturing method thereof - Google Patents
Roller bit and manufacturing method thereof Download PDFInfo
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- CN103291221A CN103291221A CN 201310240172 CN201310240172A CN103291221A CN 103291221 A CN103291221 A CN 103291221A CN 201310240172 CN201310240172 CN 201310240172 CN 201310240172 A CN201310240172 A CN 201310240172A CN 103291221 A CN103291221 A CN 103291221A
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- tooth pawl
- gear wheel
- pawl axle
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- locking nut
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Abstract
The invention discloses a roller bit and a manufacturing method thereof. A bearing system of the roller bit is a rolling cone bearing or a cone arc sliding block, the thrust surface of a locking nut abuts against a rolling cone or the small-head end face of the sliding block, the rolling cone or the big-head end face of the sliding block abuts against an inner thrust surface of a cone shell, and therefore a conical rolling or sliding bearing system is tightly arranged, and meanwhile a reliable cone shell locking function is achieved. A cone shell locking device is assembled through the method that a screwdriver or an inside hexagon spanner penetrates through a bit jaw shaft central hole to screw a bit jaw shaft tightly inside a nut instead of the method of screwing the bit jaw shaft outside the nut. According to the characteristic that the conical bit jaw shaft structure is simple, an efficient boring technology is used for machining.
Description
Technical field
The present invention relates to a kind of rock bit, be applicable to that manufacturing is used for the rock bit in the drilling well of mining, oil-gas drilling and exploitation, geological drilling, civil engineering, brill pile foundation hole etc., comprises that tricone bit, single-cone rotary drill bit, four roller bit, combination rock bit and gear wheel roller reamer etc. comprise the broken rock product of the extension modification of gear wheel shell.
Background technology
Rock bit always, particularly bearing arrangement have rolling bearing and sliding bearing two big classes.The sliding bearing supporting capacity is strong but be not suitable for high-speed cruising, and rolling bearing is fit to high-speed cruising but a little less than the supporting capacity, and the common issue with that they face all is to fall short of in the life-span, and the initial failure of bearing arrangement accounts for about 80 percent of all inefficacy probabilities.For adapting to the needs that creep at a high speed, in the rock bit field of adopting rolling bearing some novel design bearing have appearred.For example US Patent No. 004136748, for a change roller bearing is main loading bearing, the locking of ball ball is also born fractional load, the dissatisfactory structure of plain thrust bearing thrust, the taper roller bearing that can bear section axial load that it adopts, because the assembly structure reason, it also needs employing to be threaded.Also have assembly method complicated, locking mechanism adopts collar and fastening with nut, as US Patent No. 20100071959.But their primary structure is still less than what big variation, and bearing remains rolling bearing and adds the thrust slide block.Be Chinese patent ZL91105563.0 near employing taper roller bearing of the present invention system.It has adopted the taper roller bearing that approaches with the present invention, but the retaining mechanism complexity, reliability is not high enough and take space valuable in the more gear wheel shell, has dwindled the space that taper roller bearing keeps, and has limited the potentiality that taper roller bearing can be brought into play.Sliding bearing is also similar, a large amount of Cylinder lock with ball locking structures that take up space that adopt, and for example US Patent No. 004955440.The present invention be to the inventor the preceding application number be: further the replenishing and improving of the technical scheme of 201210519957.8 patent.Manufacture method as for tricone bit, because tooth pawl axle is a comparatively complicated rotary body that comprises big runway and locking slot etc., can't adopt the boring processing of high cutting speed, and must be by turning processing, runway also needs grinding to reach required finish.So the manufacture method of tricone bit all is that the gear wheel support elder generation distinguish or the single tooth pawl that comprise tooth pawl, tooth pawl axle are processed respectively bar none, load onto the rock bit that recombinant is welded as a whole behind the gear wheel shell.
Summary of the invention
The purpose of this invention is to provide a kind of rock bit, be provided with locking nut or lock-screw at tooth pawl axle, compare with locking mode with the routine assembling, it adopts screwdriver or allen wrench to pass through the method for tooth pawl axle axis through-hole nutting or screw, simplified structure and the assembly method of the retaining mechanism of rock bit, maximized cone bearing or axis of a cylinder simultaneously and hold system space and created condition to increase bearing load carrying capacity for simplifying.For example only adopt a cover taper roller bearing, or the awl watt shape slide block lobe bearing of a cover two face sliding, bear whole load and locking task simultaneously, or bearing adds collar when being not suitable for bearing locking function and locks.And in the cone bearing system, because rotating axiality, the height that the bearing arrangement itself of taper roller bearing and awl watt shape slide block lobe has to prolong the life-span of sealing device.The object of the present invention is achieved like this: between tooth pawl axle and gear wheel shell, be covered with tapper or the awl watt shape slide block lobe, be provided with a through hole in the tooth pawl axle axle center of rock bit, in be equiped with a locking nut.Locking nut major part position is provided with an annular flange flange as the thrust surface of tapper or the awl watt little end surface of shape slide block lobe, the interior thrust surface on tapper or the awl watt gear wheel shell that shape slide block lobe big end surface is pushed up.Such structure has realized only using a cover tapper or awl watt shape slide block lobe, bears the task of whole load and locking simultaneously.One of assembly method is such: load onto locking nut in the gear wheel shell earlier, place whole tappers or awl watt shape slide block lobe again, again locking nut is injected in the tooth pawl axis hole, pass the screwdriver of tooth pawl shaft through-hole insertion locking nut tail with screwdriver and tighten mouth, tighten locking nut with keeping the suitable play of bearing arrangement and get final product.At last jam nut or other anti-loosing device, seal plug etc. are loaded onto.Also can be to put locking nut earlier well, again the gear wheel shell is put on the tooth pawl axle, then awl be rolled or bores a watt shape slide block lobe and fill in singly.Or in the system that adopts collar locking, put locking nut or screw earlier well, and put collar again, again gear wheel shell and bearing are put on the tooth pawl axle, tighten lock-screw or nut by tooth pawl axle axis through-hole at last.As for the manufacture method of the present invention that adopts cone bearing, because the tooth pawl axle of cone bearing is a rotary body that does not have the simple cone of locking slot or comprise part cylinder etc., except can adopting the turning processing of generally adopting now at a slow speed, can adopt the boring processing of higher cutting speed.Grinding is also similar, can adopt taper honing etc., to obtain better surface quality such as fineness, tapering etc. and to improve working (machining) efficiency.Axis of a cylinder holds then with existing method processing and manufacturing.Bearing arrangement of the present invention is equally applicable to tooth pawl axle split from the tooth pawl and comes out to become an independent rotary body part processing, fits in the tooth pawl again, and fastening method can adopt or the prior art scheme of welding or screw, screw threads for fastening.Particularly the center has the taper tooth pawl axle of through hole to have been created condition for the tooth pawl axle with split adopts friction-welding technique to be welded in the tooth pawl by clamping securely.In addition, the tooth pawl after tooth pawl axle separated is comparatively flat, separating support and joint again, then the support axial dimension of belt lacing is not less, can become an independent forging blank, after the processing again with the joint welding or be threaded into a complete gear wheel support.
Description of drawings
Fig. 1 is the rock bit partial schematic sectional view that the present invention adopts taper roller bearing;
Fig. 2 is the rock bit partial schematic sectional view that the present invention adopts the taper sliding bearing;
Fig. 3 is the elevation of locking nut of the present invention
Fig. 4 is the elevation of pincerlike spline collar of the present invention
Fig. 5 is slide block lobe axis side view of the present invention;
Fig. 6 is tooth pawl axial cone boring processing schematic diagram of the present invention;
Fig. 7 is tooth pawl axial cone honing processing schematic diagram of the present invention;
Shown in Figure 8 is split tooth pawl axle friction welding technological schematic diagram of the present invention;
Shown in Figure 9 is that split tooth pawl axle friction welding of the present invention improves process schematic representation;
Figure 10 is the partial schematic sectional view that gear wheel support of the present invention adopts the tooth claw portion to separate combination with blank area.
Figure 11 is the journal bearing bit partial schematic sectional view that the present invention adopts collar locking;
Figure 12 is the slip cone bearing rock bit partial schematic sectional view that the present invention adopts collar locking;
Figure 13 is the rolling bearing rock bit partial schematic sectional view that the present invention adopts collar locking;
Figure 14 is that the present invention adopts the awl roller bearing of collar locking to hold the rock bit partial schematic sectional view;
Figure 15 is the journal bearing bit partial schematic sectional view that the present invention adopts lock-screw and collar locking.
In figure in 1. tooth pawl 2. tooth pawl axle 3. gear wheel shell 4. locking nut 5. locking nut thrust surface 6. gear wheel shells thrust surface 7. tighten mouthful 8. pincerlike spline collar 10. tapper 11. slide block lobe 12. boring head 13. boring cutter bar 14. blade 15. honing stones of tooth pawl axle axis through-hole 9. and tighten mouth 31. rotation stopping screw 32. seal plugs with installing rack 16. parallel rod 17. tension spring 18. tension spring push rod 19. honing head 20. friction head 21. clamping pull bar 22. clamping nut 23. tail cone 24. taper counterbore 25. gear wheel rack body 26. joint 27. collar 28. roller 29. lock-screw 30. lock-screw tails.
The specific embodiment
Be illustrated in figure 1 as the rock bit partial schematic sectional view that the present invention adopts taper roller bearing, wherein 1 is the tooth pawl, 2 is tooth pawl axle, 3 is the gear wheel shell, 4 is locking nut, 5 is the locking nut thrust surface, 6 is thrust surface in the gear wheel shell, and 7 for tightening mouth, and 8 is tooth pawl axle axis through-hole, 9 is pincerlike spline collar, 10 is tapper, remainder, particularly to the inventor the preceding application number be: 201210519957.8 conventional gear wheels such as patent are similar, seal plug, reservoir and oil circuit etc. as tooth pawl axle axis through-hole are not drawn in detail, do not give unnecessary details.The outer poppet surface of its dens in dente pawl axle 2 namely is the cone bearing runway, cooperates with gear wheel shell 3, tapper 10, and become a complete cone bearing system under the constraint of locking nut 4.The locking principle of gear wheel shell 3 is: locking nut 4 is fixed on the double-screw bolt on tooth pawl axle 2 tops with screw thread, locking nut thrust surface 5 on the locking nut 4 in abutting connection with or withstand the little end surface of tapper 10, the big end surface of tapper 10 in abutting connection with or withstand thrust surface 6 in the gear wheel shell of gear wheel shell 3, thereby realize whole locking functions.Because the parts of transmission coupling mechanism force can be the face contact each other all, sphere for example, obviously the ball retaining mechanism than existing line contact has better axial tensile strength along tooth pawl axle 2, not fragile and occupy little space, and the inner cone apex cavity face of the spherical outer surface of locking nut 4 and gear wheel shell 3 can also be designed to sliding-contact to bear a part of load, at this moment locking nut thrust surface 5 has a gap with the little end surface of tapper 10.As for assembly method of the present invention, can be earlier locking nut 4 to be packed in the gear wheel shell 3, fill up tapper 10, install sealing ring etc., pass through the axis through-hole of tooth pawl axle 2 again with stubborn locking nuts 4 such as hexagon, screwdrivers, tighten locking nut 4 with keeping the suitable play of bearing arrangement and get final product.At last pincerlike spline collar 7, seal plug etc. are loaded onto.Double-screw bolt on tooth pawl axle 2 tops is provided with the grooving of laying pincerlike spline collar 9, this grooving can have a plurality of, two mutual vertical or more groovings for example, cooperate the quincunx mouth of tightening of hexagonal, just can be at the less orientation angle tight locking nut 4 of spline in positive and negative 7.5 degree or the following scope for example, this is simple in structure clear so do not draw in detail separately.The present invention is the result who has broken through the custom thinking limitation: with screwdriver or allen wrench tighten in nut by tooth pawl axle centre bore rather than in the past must be outside nut fastening nut.Because the nut in the gear wheel shell has been sheltered from by the gear wheel shell, be difficult to the tool using nutting.This may be near the Chinese patent ZL91105563.0 of employing taper roller bearing of the present invention system, and it has adopted the taper roller bearing system that approaches very much with the present invention, also adopts helicitic texture locking, not have the reason of breakthrough but retaining mechanism is complicated.Certainly, if leave no choice but outside nut, twist screw, also can bore via hole at the gear wheel shell, twisted screw shutoff via hole again, but again what if spline? in addition, the spline method of locking nut 4 can also have multiple, and the structure of locking nut screwing mouth also can be flat recess, cross recess, interior six square grooves, plum blossom groove etc., does not give unnecessary details.Certainly, also have the conventional method of a variety of locking nuts also can adopt, for example adopt screw or splicing or the low-melting-point metal soldering welding etc. that hold out against mutually.
Be illustrated in figure 2 as the rock bit partial schematic sectional view that the present invention adopts sliding bearing, wherein 11 is the slide block lobe, and all the other are identical with Fig. 1.Both surface friction pair between its employing slide block lobe 11 conduct and tooth pawl axle 2, the gear wheel shell 3.Slide block lobe 11 with tooth pawl axle 2 or gear wheel shell 3 in any one side lubrication failure takes place causes frictional force apart from increasing even during interlock, another side still keeps the duty of sliding, and has improved reliability and the life-span of sliding bearing.And it can improve the operating rate of rock bit than existing glide bearing rock bit when operate as normal.Its locking principle is also same as shown in Figure 1, locking nut 4 relies on the screw thread on the locking nut 5 to be fixed on the double-screw bolt on tooth pawl axle 2 tops, the locking nut thrust surface 5 of locking nut 4 withstands the little end surface of slide block lobe 11, the big end surface of slide block lobe 11 is withstood the interior thrust surface 6 of gear wheel shell of gear wheel shell 3, thereby realizes whole locking functions.Because the parts of transmission coupling mechanism force are the face contact of the conical surface or sphere etc. each other all, its locking intensity and reliability are better.As for assembly method, then identical with aforesaid Fig. 1 part basically.Be typically designed to circular cone annular whole slide block and made into distinguish, namely the slide block lobe 11, are in order to realize assembling purpose fully, and whole circular cone ring slider can't fit in the gear wheel shell 3 that has thrust surface 6 in the gear wheel shell simply.The collar 27 of the distinguish that can be described to also is same principle later on.
Fig. 3 is the elevation of locking nut 4 of the present invention, wherein is provided with binding thread, is provided with to transmit allen wrench torsion and the quincunx mouth 7 of tightening of six lobes of settling pincerlike spline collar 9 simultaneously.What is particularly worth mentioning is that relative my application number formerly of the present invention is 201210519957.8 patent, be to have replaced lock-screw with locking nut, this seems little improvement, except having brought a tangible advantage: the small size gear wheel is had better structural strength, because the axis through-hole of tooth pawl axle 2 can design forr a short time.Design formerly then have the axis through-hole of tooth pawl axle 2 design the not enough intensity of little then lock-screw, design the problem of the not enough intensity of tooth pawl axle greatly then.Another one is difficult to directly see, the problem that involves manufacturing, assembling, dismounting maintenance is that locking nut 4 is than lock-screw 29 axial dimension much shorters, as long as make gear wheel shell 3 shift out the very little distance of tooth pawl axle 2, just can avoid too closely interfering because of distance between three gear wheel shells, thus assembling or dismounting gear wheel shell or bearing etc.Possibility on this assembly method not only provides possibility for the gear wheel support manufacturing of a greater variety of integral body, also provides possibility for the maintenance work of changing gear wheel bearing, sealing device etc.Be to assemble the gear wheel shell earlier for solving existing tricone bit also simultaneously, gear wheel support with three lobes is welded as a whole again, make gear wheel be in the technology of the condition of high temperature, bring the infringement to sealing device and lubrication oil or lubricating grease that possibility is provided, and for overcoming the distortion that welding brings, the precision that improves rock bit provides possibility.Rock bit of the present invention is the assembly process of the gear wheel shell in the manufacture method of tricone bit particularly, can adopt exactly on the gear wheel support that is processed into a final complete integral body, assembles the gear wheel shell at last.The profile of locking nut 4 can be spherical, also can be turriform, taper type or multidiameter shape etc.Certainly, might not assemble like this when adopting axis of a cylinder to hold, cone bearing then basically can.
Fig. 4 is the elevation of pincerlike spline collar 9 of the present invention, it adopts spring steel wire to manufacture, and in conjunction with six lobe plum blossom holes shown in Figure 5, the operating principle that is readily appreciated that it is exactly that pincerlike spline collar 9 is stuck in the drift angle of six lobe plum blossom holes, referring to Fig. 1, Fig. 2, do not give unnecessary details.Such design be easy to adopt a little hook that pincerlike spline collar 9 is extracted when maintenance, thereby dismounting lower locking nut 5 repairs or replaces bearing or sealing device etc.What deserves to be mentioned is, closely contact with the interior top of chamber of gear wheel shell 3 at the shell that adopts locking nut 5, when bearing the design scheme of certain load, locking nut 5 can be subjected to the moment of friction of the interior top of chamber transmission of gear wheel shell 3, this moment can be to screw locking nut 5, and be not allow reverse rotation during because of rock bit work, so locking nut 5 at this moment also can not established rotation stop device, as pincerlike spline collar 9.
Fig. 5 is slide block lobe axis side view of the present invention, for example wherein belong to the routine techniques design content: rubbing surface covers high-abrasive material, as babbit etc., or adopt carbide alloy, pottery or the diamond thin etc. of high rigidity and edge chamfer, oil guide groove etc. not to draw.Need further disclosed content to be: the slide block lobe 11 of awl arc can be equal thickness; Also can be that the microcephaly is thick, major part be thin, is beneficial to fastening system intensity and the ability of improving; Also can be that the microcephaly is thin, major part be thick, utilizes the squeezing action of tooth pawl axle 2 and gear wheel shell 3, makes slide block lobe 11 be tending towards the interior thrust surface of close gear wheel shell 2, thereby reduces contact and wearing and tearing to locking nut thrust surface 5.Keep lock ability to improve lifetime of system for a long time thereby be beneficial to.As seen the thickness characteristics of different slide block lobes 11 can derive different gear wheel bearing lifetime of system characteristics, for the comprehensive rock bit that filters out different qualities of accepting or rejecting in the gear wheel shell 3 of the confined space provides an approach.The present invention as shown in Figure 1 in fact exists different tapper taperings to the influence of cone bit bearing system performance too, does not give unnecessary details.
Fig. 6 is tooth pawl axial cone boring processing schematic diagram of the present invention, and wherein 12 is boring head, and 13 is boring cutter bar, and 14 is blade.When the conical surface of boring tooth pawl axle 2, boring head 12 only rotates not feeding, and feed motion is by the skewed slot slippage of boring cutter bar 13 along given tapering, thereby finishes the boring processing to the conical surface of boring tooth pawl axle 2.When the tooth pawl of boring processing distinguish, boring head 12 can be bigger.But when the tooth pawl of three lobes unification was processed in boring, boring head 12 can only be less, to avoid other two tooth pawl axle blanks to the interference of boring head 12.As for feeding method and the mechanism of boring cutter bar 13, many schemes are arranged and belong to boring axis of cone technical field, be prior art, do not give unnecessary details.
Fig. 7 is tooth pawl axial cone honing processing schematic diagram of the present invention, and wherein 15 is honing stone and installing rack, and 16 is parallel rod, and 17 is tension spring, and 18 is the tension spring push rod, and 19 is honing head.It is that the technical method conversion of honing processing column inside pipe wall is come.Oilstone was provided by centrifugal action the pressure of machined surface when different was honing processing column inside pipe wall, but in the present invention, when the conical surface of tooth pawl axle 2 is processed in the awl honing, oilstone is provided by tension spring 17 pressure of machined surface, and special design has a tension spring push rod 18, it is that the pressure that when honing head 19 back and forth movements oilstone is applied on the machined surface compensates, and avoids the too small inhomogeneous problem of grinding that causes of the big local pressure of conical surface radius local pressure excessive, that conical surface radius is little.
Be split tooth pawl axle friction welding technological schematic diagram of the present invention as shown in Figure 8.Certainly, bearing arrangement of the present invention and locking method thereof are equally applicable to tooth pawl axle 2 split from tooth pawl 1 and come out to become an independent rotary body part processing, fit into again in the tooth pawl 1, or the prior art scheme of welding or screw, screw threads for fastening.Particularly tooth pawl axle 2 is cones of tape spool heart through hole, can be by clamping securely, for the tooth pawl axle 2 with split adopts friction-welding techniques to be welded on to provide in the tooth pawl 1 may.Wherein 20 is friction head, and 21 is the clamping pull bar, and 22 is the clamping nut.The concave cones that friction head 20 is provided with and tooth pawl axle 2 is complementary fully, and or be coated with or fill up the material that increases frictional force at its concave cone face, tooth pawl axle 2 is penetrated pack into friction head 20 and use clamping nut 22 fastening of clamping pull bar 21.The value of the conical surface is that also less axial force can bring bigger conical surface pressure except accurate positioning, thereby obtains the needed moment of torsion support of friction welding.This is existing just mainly to be the reason that the complicated tooth pawl axle split technical scheme of cylinder and structure is difficult to adopt friction welding technology that can through welding, because existingly do not have the split tooth pawl axle of axis through-hole and non-cone to be difficult to solid and reliable ground clamping.Final situation when Fig. 8 paints and is equivalent to friction welding technological and finished the upset operation.As for check friction welding method for quality, can have a lot, for example adopt the method that oppositely extrudes test, if test reach material theoretical shear strength tens percent, just qualified.Underproof remedial measure can be to reweld after extruding etc.
Shown in Figure 9 is that split tooth pawl axle friction welding of the present invention improves process schematic representation.Because it is dark shallow on one side on one side that the hole of split tooth pawl axle 2 is installed on the tooth pawl 1, friction welding technological causes problems such as off-centre easily.The method that solves is to establish a tail cone 23 at split tooth pawl axle 2 afterbodys, or establish a taper counterbore 24 at tooth pawl 1, the tooth pawl axle 2 that makes split approaches rotational symmetric annular to improve the friction welding technological condition with the friction welding face of tooth pawl 1, and the while, less friction welding area was conducive to reduce the required moment of friction of friction welding.Tail cone 23 and or taper counterbore 24 between the hole can be with method landfills such as arc weldings.
Figure 10 is the partial schematic sectional view that gear wheel support of the present invention adopts the tooth claw portion to separate combination with blank area, only drawn its axisymmetric half.Wherein 1 is the tooth pawl, and 25 is the gear wheel rack body, and 26 is joint.For tricone bit of the present invention, its three tooth pawls 1 and gear wheel rack body 25 are integrated, and forge on the blank at one.Particularly as the situation of Fig. 8, employing split tooth pawl axle 2 shown in Figure 9, because do not comprise the blank part of tooth pawl 2 in the blank of gear wheel support, it is more flat than easy-formation that this forges blank.If adopt tooth pawl axle 2 and the structure that tooth pawl 1 is integrated, then forge difficulty of blank moulding.Joint 26 and gear wheel rack body 25 will adopt in manufacture process and be threaded or welding procedure is connected, concrete welding procedure such as friction welding, arc welding etc.The process of joint 26 being separated recombinant with gear wheel rack body 25 is forged three lobe blanks earlier than existing needs and is welded the technology that makes up the gear wheel support then and have higher manufacturing efficient in 120 ° of planes of milling again in the rock bit support of a lot of specifications.
Based on identical: the stubborn screw of " tightening in nut by tooth pawl axle centre bore rather than must outside nut, tighten in the past with screwdriver or allen wrench " or the design of nut and assembly method design, can also derive a kind of design of using elastic collar or distinguish collar locking gear wheel shell, have equally than the more simple structure of existing design and superior performance.
The present invention of being shown in Figure 11 adopts the journal bearing bit partial schematic sectional view of collar locking, and wherein 27 be collar, and it is placed in the interior collar groove of gear wheel shell 3.Collar 27 can be a flexible open annular integral body, just as the conventional design of existing collar.But such elastic collar is stone, or exactly is that rigidity is too big, is difficult to press small radius to fit in the collar groove in the gear wheel shell 3.The collar that the present invention will put in order circle cuts into several sections, just as the slide block lobe 11 of distinguish, just can put into easily in the collar groove in the gear wheel shell 3.Other identical with conventional design as friction pair etc. do not drawn in detail.
The present invention of being shown in Figure 12 adopts the slip cone bearing rock bit partial schematic sectional view of collar locking, it is to have changed the cylindricality sliding bearing into the taper sliding bearing on the basis of Figure 11, other is same or similar, and friction pair wherein is identical with conventional design, does not draw in detail.It is compared with technical scheme shown in Figure 2 has more characteristic of simple of structure, is more suitable for undersized rock bit.
The present invention of being shown in Figure 13 adopts the rolling bearing rock bit partial schematic sectional view of collar locking, and it is to have changed the cylindricality sliding bearing into roller bearing on the basis of Figure 11, and other is same or similar.But this programme also has a design feature, be that roller 28 not only is subjected to radial load in runway, also bear the axial load of gear wheel shell 3 and tooth pawl axle 2 runway both sides end faces, both be conducive to share load, be conducive to set upright roller 28 again and make it keep parallel with tooth pawl axle, prevent that roller from wearing and tearing into the thin kidney shape in big centre, two.
The present invention of being shown in Figure 14 adopts the awl roller bearing of collar locking to hold the rock bit partial schematic sectional view, and it is to have changed the taper sliding bearing into taper roller bearing on the basis of Figure 12, and other is same or similar.
As hereinbefore, the profile of locking nut 4 can be spherical, also can be turriform, taper type or multidiameter shape etc., and the inner chamber top portion of gear wheel shell 3 is complementary with it.
Figure 15 is the journal bearing bit partial schematic sectional view that the present invention adopts lock-screw and collar locking, clearly, the design of this employing lock-screw 29 can apply to fully from the described invention of Figure 11 to Figure 14, also is that also can be locked fully screw 29 of locking nut 4 replaces.This seems has got back to design formerly, but design does not formerly relate to the technical scheme that adopts collar locking fully, adopts the technical scheme of collar locking ripe and to take in the gear wheel shell space than ball locking little, and its superiority is arranged.And also be that collar 27 was completely restricted in the collar groove after assembling was finished, can the problem that depart from the center and the compression chord inequality takes place do not arranged as the conventional collar of design formerly.Also for several lobes that collar 27 is designed to segmentation convenient for assembly provide may, avoided the too high-leveled and difficult problem with assembling of rigidity of an integral finish collar.
Fig. 6 is first embodiment, and Fig. 8 is second embodiment, and Figure 10 is the 3rd embodiment, and Figure 11 is the 4th embodiment.
Claims (7)
1. rock bit, be applicable to make and be used for mining, oil drilling and exploitation, geological drilling, the rock bit of civil engineering etc., its bearing arrangement comprises tooth pawl axle [2], gear wheel shell [3], locking nut [4], tapper [10] or slide block lobe [11], it is characterized in that tooth pawl axle [2] is taper, tapper [10] or slide block lobe [11] are between tooth pawl axle [2] and gear wheel shell [3], locking nut [4] is fastenedly connected with tooth pawl axle [2], the locking nut thrust surface [5] of locking nut [4] is in abutting connection with the little end surface of tapper [10] or slide block lobe [11], thrust surface [6] in the gear wheel shell of the big end surface adjoining teeth hub [3] of tapper [10] or slide block lobe [11].
2. according to the invention of claim 1 defined, the conical surface that it is characterized in that tooth pawl axle [2] is to adopt boring processing.
3. according to the invention of claim 1 defined, the tooth pawl axle [2] that it is characterized in that split is to adopt friction welding to be fastened on the tooth pawl [1].
4. rock bit, be applicable to and make the rock bit that is used for mining, oil drilling and exploitation, geological drilling, civil engineering etc., it is characterized in that the gear wheel support is combined to form by gear wheel rack body [25] and these two parts of joint [26], and tooth pawl axle [2] is the cone of tape spool heart through hole.
5. rock bit, be applicable to and make the rock bit that is used for mining, oil drilling and exploitation, geological drilling, civil engineering etc., comprise tooth pawl axle [2], tooth pawl axle axis through-hole [8], gear wheel shell [3], locking nut [4], it is characterized in that locking nut [4] usefulness screw threads for fastening is on tooth pawl axle [2], locking nut [4] center is provided with interior six sides or nut screwing clamping mouth [7] such as quincunx, and this is tightened mouthful [7] and is connected with tooth pawl axle axis through-hole [8] on the tooth pawl axle [2].
6. according to the invention of claim 5 defined, it is characterized in that locking nut [4] and collar [27] in abutting connection with and be fastened on the tooth pawl axle [2], whole collar [27] or the collar [27] of several distinguish shapes are housed in the collar groove of gear wheel shell [3].
7. rock bit, be applicable to and make the rock bit that is used for mining, oil drilling and exploitation, geological drilling, civil engineering etc., comprise tooth pawl axle [2], tooth pawl axle axis through-hole [8], gear wheel shell [3], collar [27] and lock-screw [28], it is characterized in that lock-screw [28] with collar [27] adjacency and use screw threads for fastening on tooth pawl axle [2], lock-screw [28] tail end face center is provided with interior six sides or screw-driving mouth [29] such as quincunx, and whole collar [27] or the collar [27] of several distinguish shapes are housed in the collar groove of gear wheel shell [3].
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310240172 CN103291221A (en) | 2013-06-02 | 2013-06-02 | Roller bit and manufacturing method thereof |
| PCT/IB2013/060361 WO2014080372A1 (en) | 2012-11-24 | 2013-11-24 | Rolling cone earth boring bits and its manufacturing method |
| CN201310647399.8A CN103628820A (en) | 2013-06-02 | 2013-11-24 | Roller bit and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310240172 CN103291221A (en) | 2013-06-02 | 2013-06-02 | Roller bit and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103291221A true CN103291221A (en) | 2013-09-11 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201310240172 Pending CN103291221A (en) | 2012-11-24 | 2013-06-02 | Roller bit and manufacturing method thereof |
| CN201310647399.8A Pending CN103628820A (en) | 2013-06-02 | 2013-11-24 | Roller bit and manufacturing method thereof |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310647399.8A Pending CN103628820A (en) | 2013-06-02 | 2013-11-24 | Roller bit and manufacturing method thereof |
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| CN (2) | CN103291221A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014080372A1 (en) * | 2012-11-24 | 2014-05-30 | Huimin Li | Rolling cone earth boring bits and its manufacturing method |
| CN108798514A (en) * | 2017-04-27 | 2018-11-13 | 西南石油大学 | A kind of directed drilling diamond bit |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216849B (en) * | 2021-05-27 | 2022-03-18 | 河北锐石钻头制造有限公司 | Single-cone PDC concentric reaming-while-drilling bit |
-
2013
- 2013-06-02 CN CN 201310240172 patent/CN103291221A/en active Pending
- 2013-11-24 CN CN201310647399.8A patent/CN103628820A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014080372A1 (en) * | 2012-11-24 | 2014-05-30 | Huimin Li | Rolling cone earth boring bits and its manufacturing method |
| CN108798514A (en) * | 2017-04-27 | 2018-11-13 | 西南石油大学 | A kind of directed drilling diamond bit |
| CN108798514B (en) * | 2017-04-27 | 2024-01-05 | 西南石油大学 | Directional drilling diamond drill bit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103628820A (en) | 2014-03-12 |
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Application publication date: 20130911 |