CN204477001U - External thread fastener with pre-grooved tail end capable of realizing riveting assembly - Google Patents
External thread fastener with pre-grooved tail end capable of realizing riveting assembly Download PDFInfo
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- CN204477001U CN204477001U CN201520059349.2U CN201520059349U CN204477001U CN 204477001 U CN204477001 U CN 204477001U CN 201520059349 U CN201520059349 U CN 201520059349U CN 204477001 U CN204477001 U CN 204477001U
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- 238000003892 spreading Methods 0.000 description 9
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Abstract
The external thread fastener comprises a head part and a rod part with threads, wherein the head part can be pulled and screwed, the bottom of the head part is vertically connected with the top of a screw rod, the bottom of the tail end of the screw rod is provided with a through type cutting groove along the radial direction, the cutting direction of the cutting groove extends from the bottom of the tail end of the screw rod to the top of the screw rod, the number of the cutting grooves is at least one, the middle part of the bottom of the tail end of the screw rod is also provided with an inwards concave socket, and the center of the socket coincides with the center of the cutting groove. When the nut is used, the external thread fastener is firstly installed in the connecting piece, then the nut is screwed in and screwed down for fixation, then a sharp tool is used for propping against the center of the socket seat, and hammering is carried out to expand the screw rod at the groove cutting part along the radial direction, so that the function of limiting the withdrawing space of the nut is achieved, and when the nut is disassembled, the nut is unscrewed by the tool and then gradually retreats. The anti-loosening performance is better, the production and use cost is lower, and the anti-loosening device can be detached and reused, and the connecting pair can be repeatedly screwed for maintenance.
Description
Technical field
The present invention relates to a kind of mechanical whorl connection area, particularly relate to the threaded male fastener that a kind of tail end pre-slotting can realize riveting assembling, be specifically applicable to provide a kind of anti-loose performance good, detachable and reuse, the threaded male fastener that can twist again and assembly connection method thereof.
Background technique
Screw assembly connects has set up extensive, comprehensive series standard, and defined the standard piece that are threaded such as various forms of bolt, screw, nut, stud, its standardization, convenience, detachable and the characteristic such as to reuse, thread connection technology is widely applied in various machinery.
According to " Chinese automobile Investment in fastener industry investment analysis prediction address in 2011 ", the quantitative statistics of fastening piece number is used to automobile, the nearly 580 kinds of different sizes of car are close to 5000 fastening pieces, and a Medium Truck about has the fastening piece of 570 kinds of different sizes about 5710.Fastening piece significance that automobile assembling is connected as can be seen here, and the fastening piece more than 90% at present automobile used is all threaded fastener.
Current thread connection technology has become most widely used assembly connection technology in automobile and the connection of various machinery, carry the fastening function that to be linked and packed by various part, once there is the situation of getting loose in threaded fastener, assembling will be caused to lose efficacy, jeopardize the normal work of total forming apparatus such as automobile.For the automobile of running at high speed, aircraft, on it, the important screw of the key position such as motor is once in use get loose the serious consequence that phenomenon will cause machine (car) to ruin people to die.Therefore for the machinery of the high speed operations such as such as automobile, the locking unfailing performance improving its threaded fastener is very required and necessary.
The maximum threaded connection pair form of current application is that outside thread Jin Gu Jian – nut connects, as shown in Figure 4, in this threaded connection pair, screw-thread fit position is generally Spielpassung, and anti-loosening property is poor, therefore its in-service topmost failure mode be that threaded connection pair gets loose inefficacy.
Chinese patent, Authorization Notice No. is CN201982444U, authorized announcement date be the utility model patent on September 21st, 2011 disclose a kind of not only can tightly but also can riveting, easy to use can riveted bolt, this design comprises head, be connected with bar portion below head, head and bar portion are structure as a whole, and the whole body, bar portion is threaded, bar subordinate end has dug riveting hole, and Open Side Down in riveting hole.After although the riveting hole of this model utility king-rod subordinate end is beaten, pressed, formation other end can be held bar subordinate, integrate the characteristic of bolt and rivet, not only can tightly but also can riveting, it still has following defect:
First, this model utility is after nut screwing clamping, and nut also has certain distance apart from bolt tail end, and do not limit the loosening space of nut completely, Luo Shuan – nut auxiliary connection also may loosen, anti-loose poor-performing;
Secondly, the realization of this model utility riveted joint must rely on the distortion of bolt tail end, need special tool (cost higher, use limited), and riveted joint back nut normally cannot unclamp, and does not possess detachable and reuses, the function such as can to twist again.
Summary of the invention
The object of the invention is to overcome in existing thread connection technology exist anti-loose poor-performing, riveting is non-dismountable and reuse, the defect that can not twist again and problem, a kind of anti-loose better performances is provided, possesses tail end pre-slotting that is detachable and that reuse, can twist again function and can realize riveting the bolt and using method thereof that assemble.
For realizing above object, technical solution of the present invention is: a kind of tail end pre-slotting can realize the threaded male fastener of riveting assembling, comprise spiral shell head and screw rod, the diameter of the cross section of described spiral shell head is greater than the diameter of the cross section of screw rod, and the bottom of spiral shell head and the top of screw rod is perpendicular is connected;
Radially offer through grooving bottom the tail end of described screw rod, the cut direction of described grooving extends to its top by bottom the tail end of screw rod, and the quantity of grooving is at least one;
Described threaded male fastener refers to bolt, screw or stud.
Described grooving is positioned on screw rod tail end, and this screw rod tail end refers to the exposed parts after screw rod assembling nut.
The degree of depth of described grooving is less than or equal to a screw thread scale lengths.
Position, center bottom the tail end of described screw rod offers the nest seat of an indent, and the center of circle of the center of nest seat, the center of grooving, screw rod overlaps.
The shape of described nest seat is taper or circle, and the diameter of nest seat is less than the diameter of thread size of threaded male fastener.
The diameter of described nest seat is 0.2 –, 0.8 times of screw thread scale lengths.
The quantity of described grooving is at least two, and the arrangement of all groovings is for pressing same circumference uniform distribution.
Compared with prior art, beneficial effect of the present invention is:
1, a kind of tail end pre-slotting of the present invention can realize riveting in the threaded male fastener of assembling, through grooving is radially offered bottom the tail end of screw rod, the cut direction of described grooving extends to its top by bottom the tail end of screw rod, its length is the screw thread scale lengths being less than or equal to threaded male fastener, and the quantity of grooving is at least one, this design makes threaded male fastener after assembling nut, by knocking the mode of screw rod grooving position central socket seat with spreading screw rod tail end, thus expand the diameter of screw rod tail end, form the effect of riveted joint, space is exited with what limit nut, achieve effect that outside thread Jin Gu Jian – nut auxiliary connection is anti-loose.Therefore, anti-loose better performances of the present invention.
2, a kind of tail end pre-slotting of the present invention can realize riveting in the threaded male fastener of assembling, after outside thread Jin Gu Jian – nut auxiliary connection assembles, the instruments such as conventional spanner can be used to unscrew and to exit nut, not only remain traditional outside thread Jin Gu Jian – nut auxiliary connection quick detachable, can reusable advantage, and when outside thread Jin Gu Jian – nut auxiliary connection occurs lax after tightening, remain conventional threads connect can twist again, the advantage of easy care, be particularly suitable for this kind of vibration of automobile comparatively large, the connection occasion that auxiliary connection easily relaxes.Therefore, the present invention possesses advantage that is detachable and that reuse, can twist again.
3, a kind of tail end pre-slotting of the present invention can realize riveting in the threaded male fastener of assembling, and structurally, only need carry out grooving to the tail end of existing screw rod can realize, and the design's structure is simple, and easily implement, cost is low; In use, traditional conventional tool can knock screw rod tail end grooving position or unscrew and exit nut, does not need to be equipped with specialist tools, greatly reduces O&M cost.Therefore, the present invention not only cost of production is lower, and working service cost is lower.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is assembling schematic diagram of the present invention.
Fig. 4 is the structural representation that in prior art, outside thread tightly consolidates part – nut auxiliary connection.
In figure: spiral shell head 1, screw rod 2, screw rod tail end 21, grooving 3, nest seat 4, nut 5, link 6.
Embodiment
Illustrate that the present invention is further detailed explanation with embodiment below in conjunction with accompanying drawing.
See Fig. 1, Fig. 2 and Fig. 3, a kind of tail end pre-slotting can realize the threaded male fastener of riveting assembling, comprise spiral shell head 1 and screw rod 2, the diameter of the cross section of described spiral shell head 1 is greater than the diameter of the cross section of screw rod 2, and the bottom of spiral shell head 1 is connected with the top of screw rod 2 is perpendicular;
Radially offer through grooving 3 bottom the tail end of described screw rod 2, the cut direction of described grooving 3 extends to its top by bottom the tail end of screw rod 2, and the quantity of grooving 3 is at least one;
Described threaded male fastener refers to bolt, screw or stud.
Described grooving 3 is positioned on screw rod tail end 21, and this screw rod tail end 21 refers to the exposed parts after screw rod 2 assembling nut 5.
The degree of depth of described grooving 3 is less than or equal to a screw thread scale lengths.
Position, center bottom the tail end of described screw rod 2 offers the nest seat 4 of an indent, and the center of circle of the center of nest seat 4, the center of grooving 3, screw rod 2 overlaps.
The shape of described nest seat 4 is taper or circle, and the diameter of nest seat 4 is less than the diameter of thread size of threaded male fastener.
The diameter of described nest seat 4 is 0.2 –, 0.8 times of screw thread scale lengths.
The quantity of described grooving 3 is at least two, and the arrangement of all groovings 3 is for pressing same circumference uniform distribution.
Above-mentioned tail end pre-slotting can realize a using method for the threaded male fastener of riveting assembling, and described using method comprises the following steps successively:
The threaded male fastener that first can realize above-mentioned tail end pre-slotting riveting assembling loads in link 6, the position of screw rod 2 exposing beyond link 6 is enclosed within again with nut 5, and tighten fixing, fastening with the assembling realizing outside thread Jin Gu Jian – nut auxiliary connection, then the center at upper screw rod grooving 3 position bottom screw rod 2 tail end is propped up with sharp-pointed instrument, after propping up, the radially spreading distortion of screw rod grooving 3 position is made again by the mode of hammering or Pneumatic immpacting, to increase diameter dimension screw rod 2 exposing position beyond nut 5, thus restriction nut 5 exit space, after this, when needing dismounting, first unscrew nut 5 with instrument, and progressively retreat, with the squeezing action by rear withdrawing nut 5, progressively the screw rod 2 of spreading is drawn in, until exit nut 5.
Described sharp-pointed instrument refers to nail or screw-driver.
Principle of the present invention is described as follows:
The fastening piece more than 90% that current automobile uses is all threaded fastener, outside thread Jin Gu Jian – nut connects has become most widely used assembly connection technology in automobile and the connection of various machinery, but screw-thread fit position is generally Spielpassung in these threaded connection pairs, anti-loosening property is poor, therefore its in-service topmost failure mode be that threaded connection pair gets loose inefficacy, and for the automobile of running at high speed, aircraft, on it, the important threaded male fastener of the key position such as motor is once in use get loose the serious consequence that phenomenon will cause machine (car) to ruin people to die.Therefore, for the machinery of the high speed operations such as such as automobile, the locking unfailing performance improving its threaded fastener is very required and necessary.
Although rivet interlacement has the advantage do not got loose, also there are not reproducible use, not easily detachable shortcoming simultaneously.Its join strength of traditional rivet interlacement is lower, has been not suitable with the demand that the high strength such as current automobile connect.Recent emerging pulling rivet bolt be connect in conjunction with conventional rivet connection, novel assembly connection technology that the advantage that is threaded of high strength grows up, riveted bolt follows closely bar and a low-intensity by a high strength but the good collar of plasticity forms.Although this staking connects possess the feature that should not get loose, but when staking auxiliary connection occurs lax after tightening, staking connects can not twist again as being threaded, be unfavorable for the maintenance to auxiliary connection, simultaneously, pulling rivet bolt is riveting, does not therefore possess conventional stud convenient disassembly, reusable etc. advantage.In addition, compare with specification conventional stud with equality strength, pulling rivet bolt physical dimension is larger, heavier-weight, therefore cause its cost higher, do not meet automotive light weight technology development trend yet, in addition costliness, special device must be used to carry out assembly connection, the assembly space of requirement is also comparatively large compared with being threaded, because which limit applying of pulling rivet bolt, and particularly compact structure, occasion that assembly space is little as automobile.
Be difficult to possess anti-loose better performances for overcoming above prior art, detachable and reuse, the defect that can twist again, the design is as follows simultaneously:
At the grooving of screw rod tail end (threaded male fastener assembling after exposed parts) radially uniform prefabricated at least one (2 being advisable) of traditional threaded male fastener (bolt, screw, stud), also can on this basis, at the prefabricated a brood of seat in screw rod tail end center.
This in screw rod tail end local grooving and the design of prefabricated nest seat, do not affect normal assembling and the join strength of outside thread Jin Gu Jian – nut auxiliary connection, after the assembling of outside thread Jin Gu Jian – nut auxiliary connection is tightened, threaded male fastener tail end central point is propped up and suitably hammering by the sharp-pointed special tool of nail class, after can making screw rod tail end grooving, each several part is radially suitably out of shape spreading, forms the effect of riveted joint.Owing to exposing the distortion of screw rod spreading, cause exposing bar portion external diameter and become large, therefore limit nut and exit space, achieve effect that outside thread Jin Gu Jian – nut auxiliary connection is anti-loose.
With pulling rivet bolt ratio, when this neoteric outside thread Jin Gu Jian – nut auxiliary connection needs to dismantle, the instruments such as conventional spanner can be used to unscrew and to exit nut, therefore the easily detachable advantage of traditional outside thread Jin Gu Jian – nut auxiliary connection is remained, and when outside thread Jin Gu Jian – nut auxiliary connection occurs lax after tightening, the auxiliary connection of the design remain conventional threads connect can twist again, the advantage of easy care, be particularly suitable for this kind of vibration of automobile comparatively large, the connection occasion that auxiliary connection easily relaxes.
Grooving: grooving is necessary, the effect of nest seat is convenient to screw rod grooving position spreading to operate.Grooving in the design is cut from the tail end bottom surface of screw rod, enters during grooving from screw rod tail end bottom surface, and to the direction of screw tip bottom screw rod, entering certain depth can stop, and the degree of depth of grooving is generally less than and equals screw thread scale lengths.In addition, when the quantity of grooving is more than or equal to 2, the arrangement of all groovings is for pressing same circumference uniform distribution, namely the boundary line (being also the first lambda line that grooving starts when cutting) bottom all groovings and screw rod is all positioned at same circle, and the interface point that all groovings have is the center of circle of this circle, it is also the mid-point bottom screw rod simultaneously.
Embodiment:
See Fig. 1 to Fig. 3, a kind of tail end pre-slotting can realize the threaded male fastener of riveting assembling, comprise spiral shell head 1 and screw rod 2, described threaded male fastener refers to bolt, screw or stud, the diameter of the cross section of described spiral shell head 1 is greater than the diameter of the cross section of screw rod 2, the bottom of spiral shell head 1 is connected with the top of screw rod 2 is perpendicular, through grooving 3 is radially offered bottom the tail end of screw rod 2, the cut direction of described grooving 3 extends to its top by bottom the tail end of screw rod 2, the quantity of grooving 3 is at least one, if when the quantity of grooving 3 is at least two, the arrangement of all groovings 3 is for pressing same circumference uniform distribution, described grooving 3 is positioned on screw rod tail end 21, and this screw rod tail end 21 refers to the exposed parts after screw rod 2 assembling nut 5, and the degree of depth of preferred grooving 3 is less than or equal to a screw thread scale lengths.Also can offer the nest seat 4 of an indent at the position, center of the bottom of screw rod 2, the center of circle of the center of nest seat 4, the center of grooving 3, screw rod 2 overlaps.
Above-mentioned tail end pre-slotting can realize a using method for the threaded male fastener of riveting assembling, and described using method comprises the following steps successively:
The threaded male fastener that first can realize above-mentioned tail end pre-slotting riveting assembling loads in link 6, the position of screw rod 2 exposing beyond link 6 is enclosed within again with nut 5, and tighten fixing, to realize the assembling of outside thread Jin Gu Jian – nut auxiliary connection, nest seat (need not be emphasized herein in the center that the sharp-pointed instrument of the fastening rear use of auxiliary connection props up upper screw rod grooving 3 position bottom screw rod 2, because determine in advisory feedback before, grooving is required, and nest seat just further, effect better, therefore, if carried nest seat here, just meaning nest seat is the same with grooving for that, all required, cause rights protection scope by oneself artificial reducing), after propping up, the radially spreading distortion of screw rod grooving 3 position is made again by the mode of hammering or Pneumatic immpacting, to increase diameter dimension screw rod 2 exposing position beyond nut 5, thus play the function that restriction nut 5 exits space, after this, when auxiliary connection needs dismounting, first unscrew nut 5 with instrument, and progressively retreat, with the squeezing action by rear withdrawing nut 5, progressively screw rod 2 tail end of spreading is drawn in, until exit nut 5.
Above-mentioned design maintains structural feature and the connection performance of traditional threaded male fastener completely, can mate conventional plain nut, have widely applicable, that auxiliary connection cost is low advantage; Simultaneously identical with the fastening means of traditional threaded male fastener again, conventional threaded fastener instrument is adopted to get final product fastening assembling, have simple operation, easy advantage, auxiliary connection can twist maintenance after tightening during one's term of military service again, maintains the characteristic that high strength connects simultaneously.During use, as long as use nail class conical head instrument suitable hammering screw rod tail end center, expose the bar portion tail end spreading of slot portion after just screw rod can being tightened, thus add riveted joint function for threaded male fastener auxiliary connection, achieve the dual connection effect being threaded+riveting.Make this new auxiliary connection both inherit the plurality of advantages be threaded, inherit again the advantage that riveted joint not easily gets loose.
Current engineering commercial car Environmental Conditions is as places such as mines, its surface conditions very severe, therefore automobile vibration is caused to impact larger, common outside thread Jin Gu Jian – nut connects and very easily occurs loose or dislocation situation, particularly the place such as transmission shaft, suspension fixes outside thread Jin Gu Jian – nut and very easily gets loose, thus jeopardizes the safety of automobile.Therefore, anti-loosening property poor for working environment requires the position high, assembly space is less, by the tail end pre-slotting bolt that application the design creates, while substantially not changing threaded fastener appearance forrns, assembling mode, greatly can improve the locking unfailing performance of threaded connection pair, Applicable scope is very wide.Along with the continuous lifting that all trades and professions require the locking unfailing performance of machinery outside thread Jin Gu Jian – nut auxiliary connection, the application of the design also can get more and more, and will have broad application prospects.
Claims (7)
1. a tail end pre-slotting can realize the threaded male fastener of riveting assembling, comprise spiral shell head (1) and screw rod (2), the diameter of the cross section of described spiral shell head (1) is greater than the diameter of the cross section of screw rod (2), and the bottom of spiral shell head (1) is connected with the top of screw rod (2) is perpendicular, it is characterized in that:
Radially offer through grooving (3) bottom the tail end of described screw rod (2), the cut direction of described grooving (3) extends to its top by bottom the tail end of screw rod (2), and the quantity of grooving (3) is at least one;
Described threaded male fastener refers to bolt, screw or stud.
2. a kind of tail end pre-slotting according to claim 1 can realize the threaded male fastener of riveting assembling, it is characterized in that: described grooving (3) is positioned on screw rod tail end (21), this screw rod tail end (21) refers to the exposed parts after screw rod (2) assembling nut (5).
3. a kind of tail end pre-slotting according to claim 2 can realize the threaded male fastener of riveting assembling, it is characterized in that: the degree of depth of described grooving (3) is less than or equal to a screw thread scale lengths.
4. a kind of tail end pre-slotting according to claim 1,2 or 3 can realize the threaded male fastener of riveting assembling, it is characterized in that: the position, center bottom the tail end of described screw rod (2) offers the nest seat (4) of an indent, the center of circle of the center of nest seat (4), the center of grooving (3), screw rod (2) overlaps.
5. a kind of tail end pre-slotting according to claim 4 can realize the threaded male fastener of riveting assembling, and it is characterized in that: the shape of described nest seat (4) is taper or circle, the diameter of nest seat (4) is less than the diameter of thread size of threaded male fastener.
6. a kind of tail end pre-slotting according to claim 5 can realize the threaded male fastener of riveting assembling, it is characterized in that: the diameter of described nest seat (4) is 0.2 –, 0.8 times of screw thread scale lengths.
7. a kind of tail end pre-slotting according to claim 1,2 or 3 can realize the threaded male fastener of riveting assembling, it is characterized in that: the quantity of described grooving (3) is at least two, and the arrangement of all groovings (3) is for pressing same circumference uniform distribution.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520059349.2U CN204477001U (en) | 2015-01-28 | 2015-01-28 | External thread fastener with pre-grooved tail end capable of realizing riveting assembly |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520059349.2U CN204477001U (en) | 2015-01-28 | 2015-01-28 | External thread fastener with pre-grooved tail end capable of realizing riveting assembly |
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| CN204477001U true CN204477001U (en) | 2015-07-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104595329A (en) * | 2015-01-28 | 2015-05-06 | 东风商用车有限公司 | External thread fastener with pre-grooved tail end and capable of realizing riveting assembly and using method thereof |
| CN107882840A (en) * | 2017-11-08 | 2018-04-06 | 贵州航天精工制造有限公司 | A kind of lock-screw and its locking method |
| CN109737126A (en) * | 2018-11-12 | 2019-05-10 | 陈红印 | Superpower anti-slip bolt |
| CN111173824A (en) * | 2020-01-21 | 2020-05-19 | 上海球明标准件有限公司 | Bolt metal plate for realizing connection of two components |
-
2015
- 2015-01-28 CN CN201520059349.2U patent/CN204477001U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104595329A (en) * | 2015-01-28 | 2015-05-06 | 东风商用车有限公司 | External thread fastener with pre-grooved tail end and capable of realizing riveting assembly and using method thereof |
| CN107882840A (en) * | 2017-11-08 | 2018-04-06 | 贵州航天精工制造有限公司 | A kind of lock-screw and its locking method |
| CN109737126A (en) * | 2018-11-12 | 2019-05-10 | 陈红印 | Superpower anti-slip bolt |
| CN111173824A (en) * | 2020-01-21 | 2020-05-19 | 上海球明标准件有限公司 | Bolt metal plate for realizing connection of two components |
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