CN100523527C - Threaded fastener - Google Patents

Abstract

A threaded fastener (50) includes a curved-line path (64) thread provided in a helical pattern along a shank (54) of the fastener. The curved-line path can be provided on either side of the standard straight-line path (60,62) or both sides of the straight-line path. The curved-line path and can be provided on all or a portion of the thread (52) from near the tip (56) end thereof to near the head (56) end thereof.

Description

Threaded fastener

The cross reference of related application

The sequence number that this formal U.S. Patent application requires to submit to April 21 in 2004 is No.60/564,188 U.S. Provisional Patent Application, the sequence number of submitting on June 17th, 2004 are No.60/580,477 U.S. Provisional Patent Application and the sequence number of submitting on June 23rd, 2004 are No.60/582, the rights and interests of 381 U.S. Provisional Patent Application.

Technical field

The present invention relates generally to threaded fastener, more particularly, the present invention relates to be used to produce the worm structure of the threaded fastener that presets torque.

Background technique

Simple threaded fastener comprises and is configured to be meshing with each other so that outside thread member and the inner threaded member that a plurality of part interfixes.According to U.S. industrial fasteners association, screw thread is defined as being arranged on the uniform parts of spiral form on the outer surface of cylinder or the internal surface.The straight thread or the parallel thread that are formed on the cylinder are provided, and the tapered thread that perhaps is formed on the truncated cone or the cone is known.Threaded fastener is used for various application, environment and the condition of various purposes.The known thread fastening piece is made by multiple soft or hard different materials, comprises various metals and plastics.

In order to improve the performance of the threaded fastener that is used for different purposes, known multiple thread structure, for example mechanical whorl form and the thread forms that adds packing ring.Usually, all types screw thread is based on straight-line helical pattern.Pitch can be from the fastening piece of a type or size to another kind of and change, and known different pitch can be set on the different piece of same fastening piece.But no matter pitch how, screw thread is all followed straight-line helical pattern.

In standard fastener design, for specific pitch or ' substantially ' pitch, outside thread is arranged to be equal to or less than basic screw-pitch, and internal thread is arranged to be equal to or greater than basic screw-pitch.The result is, outside thread is in the inside of internal thread ' floating ', and two members are spun together in whole reach under very little or the situation that do not have to interfere, up to apply clamping pressure during finally the tightening of fastening piece till.

When fastening piece is tightened and applied clamping load,, just in fastening piece, produced frictional force under pressure state because stretch because fastening piece is placed.Owing to the reasons such as slippage, expansion and contraction cycle of the angular thread surfaces of vibration, the fastening piece that takes place as time passes, clamping load may fluff.Knownly preset torque in fastening piece, or in screw thread, use colloid substance to keep the relative position of outside thread and internal thread, even lost clamping load by nut distortion is provided.Turnbuckle increases sizable cost to manufacture process, and the known colloid substance that is used for this purpose is subjected to some restriction under extreme temperature conditions, thereby has limited durability.Comprise typical in internal thread, place plastic pad preset the torque thread forms, interfere with the matching thread of another fastening piece at the bottom of relying on the tooth top of a fastening piece or tooth.These designs do not reach the reliability and the repeatability of performance.Further, this structure provides presets in the whole length that torque is present in thread engagement between bull and the parent part, thereby all requires extra torque in whole rotary course.It is too high that the cost of torque configurations is preset in manufacturing.

In anchor design, acceptable is to be absorbed in 1/3rd screw threads of fastening piece up to 80% of all tension force usually.Correspondingly, fastener designers must be considered this feature.The whole length of the fastening piece of engagement or at least its more main portions to distribute tension force more equably be useful.

When threaded fastener is used for some off-gauge situations, can produce further difficulty.Tightening fastener parts need apply clamping load, means that the supporting plane of head, mother fastener of fastening piece and all material between the two or member all are pressed together.In so-called " soft connection ", the connection of the elastic material that for example keeps together, packing ring or same material, desirablely be, there be not excessive clamping force to be applied under the situation on the material that is kept, it be closely that fastening piece connects.Shouldered tap bolt or the standard fasteners that has a pad have been applied to this purpose, but the complicated cost that also increases is installed.

Threaded fastener is installed in the member that is designed to install with other member or link in advance, and it is known tightening then.For example, provide the various on-the-spot electric devices that are used for, it has the screw rod that the appropriate location that is arranged on terminal is used for receiving therein electric wire.Under the appropriate situation about being provided with of electric wire, tighten screw rod and electrically connect between electric wire and electric device, to set up.The pre-installed position of screw rod must be comparatively safe, and the inefficacy so that screw rod can not become can not make member not use.It is known being used for keeping the various interference of screw position or presetting torque configurations, but this structure has the required undesired effect that is used for the rotary screw torque of increase on its whole length.This makes pre-installation and finally screws more difficult.It also is known reducing as far as possible and can be screwed up to it by the precession screw rod.This has is installing and is using the shortcoming that needs to unscrew screw rod before can beginning.So not only lost time but also bothersome.

Therefore need a kind of thread forms, it provides in order to keeping the torque of presetting that fastening piece screws, and can be used for the on-the-spot ready member of preassembly, and male fastener is pre-aligned with respect to mother fastener.

Summary of the invention

The invention provides a kind of curve pitch that is arranged on whole screw threads or the sub-fraction screw thread,, perhaps provide the torque of presetting when fastening piece is tightened so that set up the torque of presetting that can be used for pre-aligned fastening piece along the required part of fastening piece.

In one aspect of the invention, provide a kind of threaded fastener, comprise screw rod and the screw thread that is arranged on this screw rod, this screw thread comprises tip of thread and Bottom of Thread.This screw thread is provided with along this screw rod with the helicon mode of routine.At least a portion screw thread is followed curvilinear path.This curvilinear path deviates from straight-line helical paths, follows conventional helicon mode simultaneously, and so consequently this tip of thread and this Bottom of Thread are followed similar curvilinear path in described part scope.

In another aspect of the present invention, provide threaded male fastener with screw rod.The screw thread that comprises tip of thread and Bottom of Thread has at least a portion, and this part is followed the curvilinear path of sine wave shape.This screw thread is arranged on this screw rod with helicon mode.

Still another aspect of the present invention provides a kind of assembly, and this assembly comprises first member and the outside thread member of thread engagement in this hole with interior threaded hole.This outside thread member comprises screw rod and is located at the outside thread that has tip of thread and Bottom of Thread on this screw rod.This outside thread is provided with along this screw rod with conventional helicon mode.This externally threaded at least a portion is followed curvilinear path.This curvilinear path deviates from straight-line helical paths, follows conventional helicon mode simultaneously.This tip of thread and this Bottom of Thread are followed similar curvilinear path in this part scope.

Advantage of the present invention provides a kind of threaded fastener, it can be scheduled to be positioned at on-the-spot ready position with respect to inner threaded member, and with respect to known fasteners, be not used for that required torque is installed in advance or be used for final rising going under the situation of tightening required torque not increasing substantially, this threaded fastener will be firmly held in the appropriate location.

Another advantage of the present invention is to provide a kind of threaded fastener with the torque of presetting that can repeat and utilize.

After consulting following detailed description, claims and accompanying drawing, other features and advantages of the present invention will become apparent for those skilled in the art, and in the accompanying drawings, identical mark is used in reference to identical feature of generation.

Description of drawings

Fig. 1 has the plan view of the threaded fastener of interactive fit screw thread for the present invention;

Fig. 2 is the plan view that is similar to Fig. 1, but expression is according to a kind of different thread forms of the present invention;

Fig. 3 is the amplification stereogram of thread forms of the present invention, does not express screw rod, to represent whole peripheries of screw thread better;

Fig. 4 is the plotted curve of thread forms of the present invention;

Fig. 5 has the plan view of the male fastener of interactive fit screw thread for the present invention;

Fig. 6 is the stereogram of the electronic component of the fastening piece of use interactive fit screw thread of the present invention;

Fig. 7 has the plan view of a part of the threaded fastener of interactive fit screw thread for the present invention;

Fig. 8 is the plan view that comprises the attachment means of bolt and inner threaded member, and this bolt has interactive fit screw thread of the present invention; With

Fig. 9 is the part enlarged view of attachment means shown in Figure 8.

Before describing embodiments of the invention in detail, be appreciated that the present invention do not limit its application to the following describes book is set forth or expression in the accompanying drawings element structure and the details of configuration.The present invention can have other embodiment and can implement or realization by variety of way.And be appreciated that word used herein and term are to be used for purpose of description should not think restriction.Here used " comprising ", " comprising " and its modification meaning comprise the member of listing thereafter and are equal to member with it, and additional member is equal to member with it.

Embodiment

Now in more detail with reference to accompanying drawing, extra check Fig. 1, mark 10 expression fastening pieces, the in more detail screw of expression with interactive fit screw thread 12 of the present invention.Screw 10 comprises screw rod 14 and is arranged on the head 16 of screw rod 14 1 ends.

In an illustrated embodiment, head 16 is made the structure by screwdriver engagement, and head 16 has the groove 18 that is formed at wherein.Those skilled in the art can understand easily, and head 18 can be made and be different from the structure with straight trough 18.Therefore, head 16 can be made the structure that has groove, is used to receive Karen Phillips bottle opener, TORX bottle opener, hexagonal bottle opener or similar bottle opener.Further, the peripheral shape of head 16 can be made the structure that spanner engages, rather than with the structure of screwdriver engagement.

Interactive fit screw thread 12 of the present invention can be used for the fastening piece 10 of polytype, shape and model, the screw 10 shown in comprising or other bolt and threaded fastener.Interactive fit screw thread 12 also can be used to be different from the screw member or the device of fastening piece.Screw thread of the present invention has purposes and application widely.

Screw thread 12 comprises from tip of thread 24 to Bottom of Thread 26 pressure flank 20 and trailing flank 22.Screw thread 12 along screw rod 14 with common spiral way setting, and the whole substantially length that can extend fastening piece 10, perhaps can from the end part interval of fastening piece some apart from beginning or finish.

The screw thread of standard fasteners is followed line thread path usually in helicon mode.On the contrary, screw thread 12 is not followed continuous straight line path in common helicon mode.Screw thread 12 is followed the curvilinear path that is arranged on the screw rod 14 in helicon mode.The curved-line thread of screw thread 12 shows as sinusoidal wave form, and shows that the revolution of helicon mode is provided with one-period in the embodiment shown in fig. 1.

Fig. 2 has illustrated a similar screw 30; But the interactive fit screw thread 32 of this screw is different from screw thread 12, because screw thread 32 is followed the curvilinear path of respectively subcontracting the sine wave shape of drawing together two periods of wave of helicon mode.More clearly visible among increase frequency ratio Fig. 1 of Fig. 2 medium wave.Similarly screw thread 32 comprises pressure flank 20, trailing flank 22, tip of thread 24 and Bottom of Thread 26.

The present invention is different from the existing structure that worm structure deforms.In the present invention, worm structure keeps identical shape of cross section at the entire curve track.Therefore, the entire curve track that the pass between pressure flank 20, trailing flank 22 and the tip of thread 24 ties up to screw thread all is identical, and also is identical at the straight section (if any) of screw thread.In whole helicon mode, shape of cross section is consistent.But 24 whole screw thread is all followed curvilinear path in helical pattern from Bottom of Thread 26 to tip of thread.Therefore, Bottom of Thread 26 is similarly followed curvilinear path along screw rod 14 with common helicon mode.

For shape and the structure that screw thread of the present invention is described better, referring to Fig. 3, its mode with enlarged view illustrates the screw thread 32 that does not have screw rod 13.But be appreciated that interactive fit screw thread of the present invention and screw thread screw rod formed thereon often is that monomer is made, Fig. 3 more clearly shows whole circumferential shapes of screw thread 32.As seen from Figure 3, for the entire curve track and the whole helicon mode of screw thread 32, it is identical that shape of cross section all keeps.Tip of thread 24, the relation of pressure flank 20 and trailing flank 22 keep identical.

Worm structure of the present invention be can make, torque or frictional force preset in being threaded, to provide.Variation or variable pitch make line line contact between outside thread and the internal thread continuously.Increase frictional force to being threaded and to allow nut thread cold forming that harder screw will be softer matched shape for not fluffing owing to vibration.Usually, the material of screw is harder in the material of wherein female member or nut than screw engagement.Therefore, even have interactive fit screw thread of the present invention, the infringement of double thread also is limited, and threaded male fastener is can be reusable.

Fig. 1 represents to have along the helical pattern revolution interactive fit screw thread 12 of a period of wave, the screw thread 32 that the revolution of expression helical pattern has two periods of wave among Fig. 2 and Fig. 3.Be appreciated that along each single commentaries on classics of helicon mode the three or more cycles can be set.Need not in the single spiral rotation of helical pattern, to be set complete period of wave.Further, though screw thread 12 and 32 is expressed as continous curve, can have curved portion and straight section according to screw thread of the present invention.Therefore, utilize screw thread design person of the present invention the desirable characteristics curve design can be gone into be threaded, and these characteristic curves are impossible in following the standard thread structure of straight-line helical paths.

Fig. 4 is the plotted curve of this mode, and some curved portion that are used for screw thread of the present invention in this mode can be different from the straight-line helical paths of standard fasteners.Dotted line 40 expression straight-line helical paths among Fig. 4, it is arranged in the helicon mode on the fastening piece.The curved-line thread of the sine wave shape of line 42 expressions departs to the both sides of line thread path 40.Therefore, the curvilinear path that the worm structure of line 42 expression is followed away from and towards the straight path of the standard thread structure of dotted line 40 expressions, not only towards the head of curvilinear path fastening piece provided thereon but also towards its end.Curved-line thread 42 expressions depart to the opposite side of line thread path 40 equably.Can predict, in some purposes, curved-line thread of the present invention can be unequally departs to the opposite side of standard straight line thread path.

Interactive fit screw thread of the present invention also can be only to a lateral deviation of standard straight line thread path 40 from.Like this, the curved-line thread of line 44 expression to a lateral deviation of line thread path 40 from, and the curved-line thread of line 46 expressions departs to the opposite side of line thread path 40.If the head that is illustrated in the fastening piece among Fig. 4 is above plotted curve, the end of fastening piece is below plotted curve, and the curved-line thread of line 44 expressions deviates from the line thread path that line 40 is represented towards end and away from head so.The curved-line thread of line 46 expression is headward and deviate from the line thread path of line 40 expressions away from end.

Curved-line thread of the present invention can be arranged at the whole screw thread on the fastening piece basically.But curved-line thread of the present invention can preferably be applicable to the part screw thread less than the whole length of screw thread.Fig. 5 is illustrated in the fastening piece 50 that has screw thread 52 on the screw rod 54.Be provided with head 56 and terminal 58 in the opposite end of screw rod 54.Screw thread 52 comprises near the standard straight line thread path parts 62 near the standard straight line thread path part 60 and terminal 56 that is located at the head 52.Three spirals that intermediate thread part 64 is included in the screw thread 52 of following curved-line thread in the helicon mode change.Screw thread 52 is included in pressure flank 66 and the trailing flank 68 between tip of thread 70 and the Bottom of Thread 72, all follows straight path substantially at all of these factors taken together of entire portion 60 and 62, and follows similar curvilinear path in entire curve part 64.

According to the needs that are used for application-specific, fastening piece 50 can be made multiple size and conventional helical pitch.In the standard female hole, fastening piece 50 precession easily is because be provided with initial standard straight-line curved-line thread path part 62 near 56 endways.Fastening piece 50 will freely begin along part 62.When curved-line thread part 64 enters interior threaded hole, the torque that needs to increase is with turn Fastener 50.Therefore, when curved-line thread part 64 meshes with mother fastener, in the process of operation and precession, fastening piece 50 will rest on the appropriate location.Afterwards, when being further rotated fastening piece 50 again, when curved-line thread part 64 rotated through the internal thread fastening piece, standard straight line thread path part 60 began and meshes with internal thread, and fastening piece 50 becomes free precession again.

Fig. 6 represents preferably fastening piece 50 to be used for structure wherein.Be electrically connected assembly 80 have interior threaded hole 82,84 and 86 and be located at each hole 82,84 and 86 in threaded fasteners 50.Electric wire receiving hole 92,94 and 96 intersects with tapped hole 82,84 and 86 respectively, and is formed in the structure that wherein receives wire end 98.Assembly 80 can utilize the fastening piece 50 in hole 82,84 and 86 to install in advance, so that the curved-line thread part of all fastening pieces 50 64 and tapped hole 82,84 and 86 engagements.Under the situation of curved-line thread part 64 with respect to terminal 58 appropriate location, fastening piece 50 remains on appropriate location so that terminal 58 safely and can not stretch in electric wire receiving hole 92,94 and 96.Between the cooperation internal thread of curved-line thread part 64 and hole 82,84 and 86, produce and interfere, so that fastening piece 50 remains on on-the-spot ready position tightly.Wire end 98 can insert electric wire receiving hole 92,94 and 96 fully, and does not interfere with the end 58 of fastening piece 50.When wire end 98 inserted rightly, coupled fasteners 50 was butted on wire end 98 and is tightened to set up electrical connection.Though each fixed block 50 is securely held in on-the-spot ready position, after small rotation made curved-line thread part 64 exceed the cooperation internal thread forward, fastening piece 50 still can relatively freely rotate.Fastening piece 50 props up finally tightening of wire end 98 and can finish under the situation that does not need undue torque.

Sinusoidal wave wave amplitude is slightly larger than the internal thread groove width, so that produce the frictional force of required increase along curved-line thread part 64.In one embodiment, sine wave curve part 64 departs to the both sides of standard straight-line track, and it is the same that line 42 is as shown in Figure 4 represented.Curved-line thread part does not make the internal thread of the cooperation of assembly 50 deform, but is causing that not compounding ingredient begins under the situation of plastic deformation, only is frictionally engage threads pressure flank and screw thread trailing flank.Sinusoidal curved-line thread path provides the recess of the fluctuating engagement internal thread of nature between crest.Be different from other known interactive fit screw thread, fastening piece 50 does not produce interference between a tip of thread and another Bottom of Thread, and provides on the contrary along the cooperation of pressure flank and trailing flank.The big footpath of fastening piece 50 and path remain unchanged in its whole length, and line thread path part 60,62 or curved-line thread part 64 all do not have significantly to degenerate on performance, and fastening piece 50 can be reused.Because fastening piece 50 does not make the screw thread distortion in hole 82,84 and 86, so assembly 80 also can be reused.

Another useful purposes of the present invention is to be used for various calibrations or adjusting screw, and they do not remain on adjusted position slippingly.The fastening piece that is provided with the curved-line thread part along the live part of the whole reach of screw thread is effective as calibration screw or lock screw.The axial position of this screw is with respect to this screw engagement cooperation internal thread wherein, even making usually under this device loosening vibration or other situation, also can continue to bear regulating action.Can be along the length adjustment screw of curved-line thread part, and bear regulating action or bear the re-adjustments effect continuing.Confining force in female member do not have obviously to reduce the time, can repeatedly regulate.Therefore, screw of the present invention can be used as calibration screw or adjusting screw with common or standard female part, and does not need to design especially internal thread to keep the axial position of outside thread adjusting member.Screw member with screw thread of the present invention can be set to improve part, and does not need to change connected screw member.Correspondingly, calibration screw of the present invention or adjusting screw can be installed easily as an improvement, and the adjusting reliability of the device of this screw is installed with raising.

Curved-line thread of the present invention can design and produce in a large number to meet needs widely.The frequency of wave mode, wave amplitude, position and ripple phase can change in the curved-line thread, being fit to hard or soft attaching nut construction material, and for example in the free precession of fastening piece or be in and preset torque following time, the order of performance of change fastening piece.Can adopt a plurality of free precession length and a plurality of frictional force or preset the torque area.Can with terminal centre the curved-line thread part be set at the head of fastening piece and preset torque zone with foundation, and the curved-line thread part can be set near the head of fastening piece as presetting torque zone, so that in the process of final tightening fastener parts, be fit to engagement.Like this, need not apply under the situation of firm grip power to maintenance material in its vicinity, male fastener can be tightened with respect to mother fastener or be fixing.Fastening piece of the present invention is useful for so-called " being flexible coupling ".

Fastening piece of the present invention can be made by multiple metal or plastic material, and standard fasteners is the same as is known.Can use the finishing and the coating that are similar to known standard fasteners to handle.

Can utilize variation with the wave amplitude of trade-off curve curved-line thread path part and frequency to reach the result who wants.In the curved-line thread part by a narrow margin curve significantly do not change required torque in the assembly process, but after applying clamping load in the end tightening, influence the interaction between outside thread and the internal thread.In case applied clamping load, just between the straight line helical internal thread of the crest of the outside thread member of curve and mother fastener, set up line and contacted.Pressure in the connection points to the head of fastening piece, and therefore the confining force that increases is provided under load.Because the thread cross section shape partly remains unchanged in entire curve, so all retention wire contacts between male fastener and mother fastener from the tooth bottom to tooth top.Like this, point is opposite with the worm structure of putting the distortion that contacts with producing in fact, and the present invention distributes for improvement power provides the straight line that prolongs contact.

Fig. 7 represents that one has the fastening piece 100 of interactive fit screw thread 102, and it has pressure flank 104, trailing flank 106, tip of thread 108 and Bottom of Thread 110.Curve crest in curvilinear path part and the internal thread (not shown) of cooperation 110 are set up line and are contacted from tip of thread 108 to Bottom of Thread.The crest of some rather than all screw threads is expressed with line 112, and along the line 112 110 carry out the line contact from tip of thread 108 to Bottom of Thread.As time goes on and variation of temperature act on junction point, in closely being connected, stand distortion with the internal thread of screw thread 102 engagement, present externally threaded shape, so increased and preset thread torque.Eliminated two plane of inclination with the interactional curved-line thread of internal thread and slided mutually or loosening common characteristic, and screw thread 102 has produced difficult slip or loosening interlock fit.

Higher amplitude curve in the curved-line thread part has increased required torque in assembly process, and can be as the torque characteristic that presets of the diverse location of the whole helical thread portion of fastening piece.

Fig. 8 represents fastening piece 120, and it has the screw thread 122 that is arranged on the screw rod 124, and its opposite end at screw rod 124 is provided with head 126 and terminal 128.The curved-line thread part 130 of the screw thread 122 that enlarged view Fig. 9, expression and the female thread portion 132 that is connected female member mesh.Pressure flank part 143 and trailing flank part 136 in the continuous commentaries on classics of screw thread 122 are axially aligned substantially. Part 134 and 136 is ' out-phase ', forms the reverse part of curved-line thread part 130 tracks.Therefore, part 134 and 136 reverse engagement first and second 138 and 140 of single female thread portion 132 in single commentaries on classics of internal thread respectively.Because female thread portion 132 remains between two continuous commentaries on classics of screw thread 122 by this way, so comprise that the balance of the threaded fastener of line thread path part is free-oscillation, the while outside thread is located substantially on the center and meshes with internal thread between the two and not.As a result, only by the zone decision of curved-line thread part 130, when turn Fastener 120, curved-line thread part 130 meshes with the part 132 of internal thread in turn Fastener 120 required torques.Correspondingly, torque request can be controlled exactly by the wave amplitude of the curve in the curved-line thread part and the selection of frequency.The crest of curved-line thread part equal intervals makes fastening piece keep straight in the hole.

The invention provides design and have the very low torque of presetting, but do not lose the ability of the fastening piece of whole torque risks.By reducing the area of contact of curved-line thread part 130 and female thread portion 132 to greatest extent, remain on the externally threaded balance of the void area that cooperates internal thread simultaneously, preset torque owing to have only area of contact to provide, so can produce the very low torque of presetting.But, design very lowly even preset torque, it also is to determine with reliably.

Other variation also may be consistent with the present invention.For example, curvilinear path can be provided with in single commentaries on classics of helicon mode, or even along being provided with in the scope that is less than a commentaries on classics.Further, it is sinusoidal that curvilinear path needs not to be, and can be other curve form.It is consistent that curve form needs not to be, but can change frequency, wave amplitude and ripple phase.Straight path can be arranged in the curvilinear path.It also is foreseeable also having other variation.

By regulating and change the torque of presetting of male fastener in mother fastener, the invention provides the threaded fastener that is used for special-purpose and application of accurate design.Fastener assembly can design as required exactly, is included in the pre-installation that the threaded male fastener that is positioned at the internal thread fastening piece is provided on the end of fastening piece and the head end position intermediate.The performance of fastening piece can repeat and utilize.

Aforesaid variation and modification are all within the scope of the present invention.Be appreciated that here that invention open and that limit is prolonged and obviously from the two or more optional combination of text and/or accompanying drawing or the independent characteristic mentioned.Various optional aspect of the present invention is formed in all these different combinations.Embodiment as described herein has illustrated and has been used to implement known best way of the present invention, and will make others skilled in the art can utilize the present invention.Claim should be interpreted as comprising the optional embodiment of prior art permissible degree.

Various feature of the present invention will be illustrated in the claim below.

Claims (28)

1. threaded fastener comprises:

Screw rod has head at the one end, has end in the opposite end of one end;

Be arranged at the screw thread on the described screw rod, it has tip of thread and Bottom of Thread, and with conventional helicon mode setting, described screw thread also has pressure flank and trailing flank from described tip of thread to described Bottom of Thread to described screw thread along described screw rod; And

At least a portion of described screw thread is followed curvilinear path, and described curvilinear path off-straight curved-line thread path is also followed described conventional helicon mode, and simultaneously, described tip of thread and described Bottom of Thread are followed similar curvilinear path in described part,

Described screw thread also constitutes, and to described Bottom of Thread, described pressure flank and described trailing flank are followed straight path substantially from described tip of thread, and keeps constant substantially sectional shape at least on the described part of following described curvilinear path of described screw thread.

2. fastening piece according to claim 1, wherein, described curvilinear path only departs from described line thread path below described line thread path.

3. fastening piece according to claim 1, wherein, the described screw thread of following described line thread path has pitch, and described screw thread also has vibration pitch between the adjacent portion of following described line thread path of the described part of following described curvilinear path of described screw thread and described screw thread, make described vibration pitch be equal to or less than the described pitch with respect to the described screw thread of following described line thread path on the side of the more close described end of described head in described line thread path.

4. fastening piece according to claim 1, described screw thread have the line thread part on the opposite side that is located at the described part of following described curvilinear path.

5. fastening piece according to claim 1 is compared with described end, and the described part of described screw thread more approaches described head.

6. fastening piece according to claim 1, the described part of described screw thread comprises whole described screw threads substantially.

7. fastening piece according to claim 1, the described part of described screw thread comprise single a commentaries on classics in described helicon mode.

8. fastening piece according to claim 1, the described part of described screw thread comprise that in described helicon mode being less than a list changes.

9. form single period of wave in the commentaries on classics in described helicon mode of fastening piece according to claim 1, the described part of described screw thread.

10. form at least two periods of wave in the commentaries on classics in described helicon mode of fastening piece according to claim 1, the described part of described screw thread.

11. fastening piece according to claim 1, the described part of described screw thread comprise the part of axially aligning of continuous commentaries on classics in the relative part of wave phase.

12. a threaded male fastener comprises:

Screw rod has head at the one end, has end in the opposite end of one end;

Screw thread, be arranged on the described screw rod with conventional rotary mode, described screw thread comprises tip of thread and Bottom of Thread, and described screw thread has the curvilinear path that at least a portion is followed sine wave shape, and described screw thread also has pressure flank and trailing flank from described tip of thread to described Bottom of Thread; And

Described screw thread also constitutes, from described tip of thread to described Bottom of Thread, described pressure flank and described trailing flank are followed straight path substantially, and keep constant substantially sectional shape with described sine wave shape at least on the described part of following described curvilinear path of described screw thread.

13. threaded male fastener according to claim 12, the curvilinear path of described sine wave shape has three periods of wave along each single commentaries on classics of described conventional rotary mode at least, thereby on described curvilinear path, described screw thread comprises that continuous non-rectilinear changes pitch.

14. threaded male fastener according to claim 12, wherein, described curvilinear path is off-straight curved-line thread path below line thread path only.

15. threaded male fastener according to claim 12, wherein, the described screw thread of following line thread path has pitch, and described screw thread also has vibration pitch between the adjacent portion of following described line thread path of the described part of following described curvilinear path of described screw thread and described screw thread, make described vibration pitch be equal to or less than the described pitch of the described screw thread of following described line thread path on more close described terminal side of described line thread path.

16. threaded male fastener according to claim 12, described screw thread have the straight path part that is arranged on described curvilinear path part opposite side.

17. threaded male fastener according to claim 12, the described part of described screw thread comprise the part of axially aligning of continuous commentaries on classics in the axial mode of the relative part of wave phase.

18. threaded male fastener according to claim 12, described curvilinear path is with a plurality of revolution settings of helicon mode.

19. threaded male fastener according to claim 12, described curvilinear path is provided with single commentaries on classics of helicon mode.

20. an assembly comprises:

First member with interior threaded hole; With

Thread engagement is in the outside thread member in described hole, and described outside thread member comprises:

Screw rod has head at the one end, has end in the opposite end of one end;

Be arranged at the outside thread on the described screw rod, it has tip of thread and Bottom of Thread, and with conventional helicon mode setting, described screw thread also has pressure flank and trailing flank from described tip of thread to described Bottom of Thread to described outside thread along described screw rod; And

Described externally threaded at least a portion is followed curvilinear path, and described curvilinear path off-straight curved-line thread path is also followed described conventional helicon mode, and simultaneously, described tip of thread and described Bottom of Thread are followed similar curvilinear path in described part,

Described screw thread also constitutes, from described tip of thread to described Bottom of Thread, described pressure flank and described trailing flank are followed straight path substantially, and keep constant substantially sectional shape at least on the described externally threaded described part of following described curvilinear path.

21. assembly according to claim 20, wherein, described curvilinear path is that described curvilinear path only departs from described line thread path towards described end and away from described head along each single sinusoidal form with at least three periods of wave that changes of described conventional rotary mode.

22. assembly according to claim 20, wherein, described screw thread has vibration pitch between the adjacent portion of following described line thread path of the described part of following described curvilinear path of described screw thread and described screw thread.

23. assembly according to claim 22, wherein, described vibration pitch is equal to or less than the described pitch of the described screw thread of following described line thread path on a side of the more close described end of described line thread path.

24. assembly according to claim 20, wherein, described curvilinear path only departs from described line thread path below described line thread path.

25. assembly according to claim 20, the described outside thread that is arranged on the described screw rod has the line thread part that is located on the described part opposite side of following curvilinear path.

26. assembly according to claim 20, described externally threaded described part comprises single commentaries on classics in described helicon mode.

27. assembly according to claim 20, described externally threaded described part comprise change more in described helicon mode.

28. assembly according to claim 20, described externally threaded described part comprises the part of axially aligning of continuous commentaries on classics in the relative part of wave phase.

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