CN103291727A - Anti-loosening cylindrical threaded part - Google Patents

Anti-loosening cylindrical threaded part Download PDF

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Publication number
CN103291727A
CN103291727A CN2013102757276A CN201310275727A CN103291727A CN 103291727 A CN103291727 A CN 103291727A CN 2013102757276 A CN2013102757276 A CN 2013102757276A CN 201310275727 A CN201310275727 A CN 201310275727A CN 103291727 A CN103291727 A CN 103291727A
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CN
China
Prior art keywords
thread
cylindrical
threaded
external
piece
Prior art date
Application number
CN2013102757276A
Other languages
Chinese (zh)
Inventor
许松林
Original Assignee
许松林
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 许松林 filed Critical 许松林
Priority to CN2013102757276A priority Critical patent/CN103291727A/en
Publication of CN103291727A publication Critical patent/CN103291727A/en
Priority claimed from KR1020157035807A external-priority patent/KR20160003313A/en

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Abstract

The invention discloses an anti-loosening cylindrical threaded part which comprises an internal threaded part and an external threaded part. A cylindrical internal thread is arranged in an inner hole of the internal threaded part, a cylindrical external thread is arranged on a screw of the external threaded part, the screw of the external threaded part is provided with the cylindrical surface parallel to a longitudinal center axis of the external thread, and the external diameter of the cylindrical surface is smaller than the maximum external diameter of the external thread. The internal thread, the surface of the external thread and the cylindrical surface are not covered with anti-loosening materials. After the internal thread and the external thread are mutually tightened, the cylindrical surface and a crest of the internal thread form a mutually close contact structure which is a horizontal locking structure, effective looseness prevention between the cylindrical internal threaded part and the cylindrical external threaded part can also be achieved without longitudinal contractility of a workpiece and the threaded part, the anti-loosening cylindrical threaded part is suitable for looseness prevention in rigid fastening connection and elastic connection and the like, and anti-loosening stability is high.

Description

Anti-loosening cylindrical thread spare

Technical field

The present invention relates to a kind of anti-loosening cylindrical thread spare.

Background technique

The loosening of cylindrical thread spare connection pair is the problem that perplexs us for a long time in the environment of transverse vibration or impact, does cylindrical thread spare connect what is secondary loosening reason in the environment of transverse vibration or impact so? the following inventor makes a concrete analysis of:

Connect between the secondary internal and external screw thread at one group of cylindrical thread spare, friction factor and lead angle between the tooth side reach certain value, just can realize that threaded piece connects secondary vertical self-locking.

Common cylindrical thread spare connects the secondary time spent of doing that is not subjected to external force under the state of tightening, and vertically, laterally all has certain clearance between the internal and external screw thread.

With one group of standard dextrorotation cylindrical thread nut screwing clamping on the corresponding full tooth cylindrical thread of standard dextrorotation bolt (vertically, laterally all having certain clearance between the internal and external screw thread), one end of nut contacts with bolt head and has the threaded piece of certain pretightening force to connect the secondary example that is: bolt head is up under the attitude perpendicular to horizontal plane, and threaded piece connects the secondary horizontal linear direction forward done with the motion of the hard fixture of certain speed bump (bump moment have only bolt head to contact with fixture).If connect the plane that secondary moving direction is parallel to each other with externally threaded longitudinal central axis line and with threaded piece with the longitudinal central axis line that comprises overlapped internal thread screw bolt and nut is divided into the left and right sides, then the externally threaded upper tooth side in the left side of bolt is the curved ramp that is downward, the externally threaded upper tooth side in the right side of bolt then is to be curved ramp upwards, because this structure, the moment that connects secondary bump fixture when threaded piece, be the trend of mutual extrusion between the externally threaded upper tooth side of the lower tooth side of the right side internal thread of nut and the right side of bolt, and be the trend that breaks away from mutually between the externally threaded upper tooth side in the left side of the lower tooth side of the left side internal thread of nut and bolt, so connect the moment of secondary bump fixture when threaded piece, frictional force between the externally threaded upper tooth side of the lower tooth side of the right side internal thread of nut and the right side of bolt is bigger than the frictional force between the externally threaded upper tooth side in left side of the lower tooth side of the left side internal thread of nut and bolt, so connect the moment of secondary bump fixture when threaded piece, nut can produce surface of contact with the externally threaded upper tooth side of the lower tooth side of right side internal thread and right side be fulcrum (in theory, in one circle of common cylinder screw thread, on externally threaded, the lower tooth side all is to be arranged along the helix of screw thread by a lot of mutual uneven straight lines to form, the lower tooth side and one of a circle internal thread of the common cylinder screw thread of contact is enclosed between the externally threaded upper tooth side as long as change the state of contact of coincideing mutually so coincide mutually, between the lower tooth side and externally threaded upper tooth side of internal thread, will have only a point of contact rather than surface of contact, so this point of contact is exactly theoretic fulcrum) do the trend that rotatablely moves left, so when threaded piece connects the certain value of making a concerted effort to surpass that the secondary moment nut that clashes into fixture is subjected to, nut will be done no stationary axle to the motion of anticlockwise, the nut motion of moving back with respect to the bolt pine just, and in, lateral clearance between the outside thread just in time provides nut to do the space that no stationary axle rotatablely moves left.As a following little experiment: more than the twice of the cylindrical pencil of the horizontal suspended external diameter that to put an internal diameter be pencil, (be convenient to like this experimentize, visual effect that also can amplification test simultaneously) circle, push hard the middle part of circle, circle will be done the vertically motion of rotation of no stationary axle, and as long as thrust direction is constant, the sense of rotation of circle is also constant, as long as thrust direction one becomes, the sense of rotation of circle also becomes.

Therefore, can think that the common cylinder threaded piece connects the secondary reason of becoming flexible in generation in the environment of transverse vibration or impact and is: the common cylinder threaded piece connects secondary in the environment of transverse vibration or impact, because the helix structure of screw thread, in one side, frictional force between the externally threaded tooth side is than in the opposite side, frictional force between the externally threaded tooth side is bigger, so inner thread piece or external thread piece can produce with in the bigger side of frictional force, the surface of contact of externally threaded tooth side is that fulcrum is done the trend that laterally rotatablely moves, so when inner thread piece or external thread piece be subjected to make a concerted effort to surpass certain value the time, inner thread piece or external thread piece will be done the laterally motion of rotation of no stationary axle, in laterally the direction of rotation is exactly, loose relatively direction of moving back between the external thread piece, and in, in lateral clearance between the outside thread provides, do the space that no stationary axle laterally rotatablely moves between the external thread piece.

Therefore, as long as stop the no stationary axle between the internal and external screw thread spare laterally to rotatablely move, just can realize that threaded piece connects pair locking fully in the environment of transverse vibration or impact.

U.S. Harold (" Ace ") has designed the Spiralock nut, obtains patent the seventies in 20th century, obtains user's very big favorable comment by the operation of Detroit industrial group in 1979.But MIT (U.S. horse province Institute of Technology) professor Nayak claims: " test situation of this fastening system is good especially, and the purpose of test is in default of theoretical foundation ".The wedge shape inclined-plane that is 30 ° of angles with internal thread or externally threaded longitudinal central axis line is arranged at the bottom of the internal thread of Spiralock cylindrical thread spare or the externally threaded tooth, and the dynamic friction factor between the thread surface of most of cylindrical thread spare connection pairs that need be locking is all less than tan30 ° (≈ 0.577), so horizontal locking between internal thread or externally threaded surface and the wedge shape inclined-plane, therefore very big pretightening force that must handy recommendation is out of shape generation between internal thread or externally threaded surface and the wedge shape inclined-plane and is become the structure of horizontal locking, thereby in effectively stoping, no stationary axle between the external thread piece laterally rotatablely moves, and could realize that cylindrical thread spare connects the effectively locking of pair.

Object is still on the inclined-plane, when the inclination angle on inclined-plane increases to θ, object can at the uniform velocity glide from the inclined-plane just, the inclination angle of inclined plane θ of this moment is called friction angle, can calculate dynamic friction factor between object and the inclined-plane according to the friction angle size, be μ=tan θ, also can calculate friction angle size, i.e. θ=tan according to the dynamic friction factor between object and the inclined-plane -1μ.When inclination angle of inclined plane during less than friction angle θ, it is multiple no matter the object on the inclined-plane becomes, and object can not slide; When inclination angle of inclined plane during greater than friction angle θ, it is multiple no matter the object on the inclined-plane becomes, and object all can slide.

In the use of threaded fastener, if the dynamic friction factor between the internal and external screw thread is excessive, cause easily producing loosening crisis between coupled because clamping force makes inadequately.According to the VDA235-101 standard that German automobiles TIA formulates, the dynamic friction factor between the internal and external screw thread of internal and external screw thread spare should be greater than 0.15.

The cylindrical thread spare of existing wedge thread locking, the longitudinal extension power that must rely on threaded piece and workpiece obtains pretightening force and could realize, so be only applicable to the locking of the fastening connection of rigidity, the cylindrical thread spare connection pair of existing wedge thread is in the environment of complicated vibrations or impact for a long time, can lose part or all of pretightening force because of the reasons such as linear deformation of threaded piece and workpiece, thereby cause locking inefficacy.

Summary of the invention

Technical problem to be solved by this invention is: for the above-mentioned deficiency of the cylindrical thread spare that overcomes existing wedge thread, the invention provides a kind of anti-loosening cylindrical thread spare, also can realize effectively locking between cylinder inner thread piece and the cylinder external thread piece under the situation of the longitudinal extension power that does not have threaded piece and workpiece, it is locking to be applicable to that various cylindrical thread spares such as the fastening connection of rigidity, resilient connection connect, and locking stability is stronger.

For addressing the above problem, the technical solution used in the present invention is: be provided with the cylinder internal thread in the endoporus of inner thread piece, the screw rod of external thread piece is provided with the cylinder outside thread, the periphery that is parallel to each other with externally threaded longitudinal central axis line is arranged on the screw rod of external thread piece, the external diameter of periphery is less than externally threaded maximum outside diameter, be not covered with locking material on internal thread and externally threaded surface and the periphery, after screwing mutually between internal thread and the outside thread, it is mutually tight contacting structure between the crest of periphery and internal thread, the horizontal structure of locking just, thereby in effectively stoping, no stationary axle between the external thread piece laterally rotatablely moves, and just can realize effectively locking between cylinder inner thread piece and the cylinder external thread piece.

The invention has the beneficial effects as follows: above-mentioned anti-loosening cylindrical thread spare, compare with the cylindrical thread spare of existing wedge thread, it also can realize effectively locking between cylinder inner thread piece and the cylinder external thread piece under situation of the longitudinal extension power that does not have threaded piece and workpiece, it is locking to be applicable to that various cylindrical thread spares such as the fastening connection of rigidity, resilient connection connect, and locking stability is stronger; Above-mentioned anti-loosening cylindrical thread spare, it is simple in structure, easy to use, and utilizes existing processes and equipment just can realize large-scale production.

Description of drawings

Fig. 1 is that the threaded piece after screwing mutually between internal thread and the outside thread of the first embodiment of the present invention connects secondary center vertical profile schematic side view;

Fig. 2 is that the threaded piece after screwing mutually between internal thread and the outside thread of the second embodiment of the present invention connects secondary center vertical profile schematic side view;

Among the figure: 1, inner thread piece, 2, external thread piece, 3, internal thread, 4, outside thread, 5, the longitudinal central axis line, 6, periphery.

Embodiment

Below by specific embodiment anti-loosening cylindrical thread spare of the present invention is described in further detail.

Embodiment 1

As shown in Figure 1, anti-loosening cylindrical thread spare, comprise inner thread piece 1 and external thread piece 2, wherein: be provided with cylinder internal thread 3 in the endoporus of inner thread piece 1, the screw rod of external thread piece 2 is provided with cylinder outside thread 4, the periphery 6 that has the longitudinal central axis line 5 with outside thread 4 to be parallel to each other at the bottom of the tooth of outside thread 4, the external diameter of periphery 6 is less than the maximum outside diameter of outside thread 4; Be not covered with locking material on the surface of internal thread 3 and outside thread 4; As shown in Figure 1, after screwing mutually between internal thread 3 and the outside thread 4, be mutually tight contacting structure between the crest of periphery 6 and internal thread 3.

Embodiment 2

As shown in Figure 2, anti-loosening cylindrical thread spare, comprise inner thread piece 1 and external thread piece 2, wherein: be provided with cylinder internal thread 3 in the endoporus of inner thread piece 1, the screw rod of external thread piece 2 is provided with cylinder outside thread 4, the periphery 6 that has the longitudinal central axis line 5 with outside thread 4 to be parallel to each other on the screw rod of external thread piece 2, the external diameter of periphery 6 is less than the maximum outside diameter of outside thread 4; Be not covered with locking material on the surface of internal thread 3 and outside thread 4 and the periphery 6; As shown in Figure 2, after screwing mutually between internal thread 3 and the outside thread 4, be mutually tight contacting structure between the crest of periphery 6 and internal thread 3.

The above embodiments are principle and the effect thereof of illustrative the invention only, and the embodiment of part utilization, but not is used for restriction the present invention; Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the invention design, can also make some distortion and improvement, these all belong to protection scope of the present invention.

Claims (1)

1. anti-loosening cylindrical thread spare, comprise inner thread piece and external thread piece, be provided with the cylinder internal thread in the endoporus of inner thread piece, the screw rod of external thread piece is provided with the cylinder outside thread, the periphery that is parallel to each other with externally threaded longitudinal central axis line is arranged on the screw rod of external thread piece, the external diameter of periphery is less than externally threaded maximum outside diameter, be not covered with locking material on internal thread and externally threaded surface and the periphery, it is characterized in that: after screwing mutually between internal thread and the outside thread, be mutually tight contacting structure between the crest of periphery and internal thread.
CN2013102757276A 2013-07-03 2013-07-03 Anti-loosening cylindrical threaded part CN103291727A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013102757276A CN103291727A (en) 2013-07-03 2013-07-03 Anti-loosening cylindrical threaded part

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
CN2013102757276A CN103291727A (en) 2013-07-03 2013-07-03 Anti-loosening cylindrical threaded part
KR1020157035807A KR20160003313A (en) 2013-07-03 2014-04-15 Anti-loosening cylindrical threaded part
EP14819641.3A EP3020985A4 (en) 2013-07-03 2014-04-15 Anti-loosening cylindrical threaded part
JP2016520248A JP2016522374A (en) 2013-07-03 2014-04-15 Locking cylindrical screw member
US14/898,854 US20160131176A1 (en) 2013-07-03 2014-04-15 Anti-loosening cylindrical threaded part
PCT/CN2014/075344 WO2015000316A1 (en) 2013-07-03 2014-04-15 Anti-loosening cylindrical threaded part
CA2915886A CA2915886A1 (en) 2013-07-03 2014-04-15 Anti-loosening cylindrical threaded part

Publications (1)

Publication Number Publication Date
CN103291727A true CN103291727A (en) 2013-09-11

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CN2013102757276A CN103291727A (en) 2013-07-03 2013-07-03 Anti-loosening cylindrical threaded part

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015000317A1 (en) * 2013-07-03 2015-01-08 Xu Songlin Anti-loosening cylindrical threaded part
WO2015000316A1 (en) * 2013-07-03 2015-01-08 Xu Songlin Anti-loosening cylindrical threaded part
WO2019205956A1 (en) * 2018-04-23 2019-10-31 Xu Songlin Threaded joint preventing self-rotation in loosening direction

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US271852A (en) * 1883-02-06 Duane hull
DE2948967A1 (en) * 1978-12-11 1980-06-19 Aerpat Ag Blind fastener
EP0063677A1 (en) * 1981-04-27 1982-11-03 Lear Siegler, Inc. Self-locking fastener and tool for making same
CN2217706Y (en) * 1994-01-06 1996-01-17 上海铁道学院轮轨系统研究所 Anti-loosening nut
JP2002349536A (en) * 2001-05-31 2002-12-04 Nitto Seiko Co Ltd Locking screw
CN203374616U (en) * 2013-07-03 2014-01-01 许松林 Anti-loosening cylindrical screw element

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US271852A (en) * 1883-02-06 Duane hull
DE2948967A1 (en) * 1978-12-11 1980-06-19 Aerpat Ag Blind fastener
EP0063677A1 (en) * 1981-04-27 1982-11-03 Lear Siegler, Inc. Self-locking fastener and tool for making same
CN2217706Y (en) * 1994-01-06 1996-01-17 上海铁道学院轮轨系统研究所 Anti-loosening nut
JP2002349536A (en) * 2001-05-31 2002-12-04 Nitto Seiko Co Ltd Locking screw
CN203374616U (en) * 2013-07-03 2014-01-01 许松林 Anti-loosening cylindrical screw element

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
孙秀芳: ""螺纹联接自锁性能的分析"", 《山西广播电视大学学报》, no. 4, 30 December 2000 (2000-12-30) *
沈英明等: ""螺纹联接防松性能的一种测试与评价新方法"", 《石家庄铁道学院学报》, vol. 15, no. 1, 25 March 2002 (2002-03-25), pages 16 - 2 *
赵勇: ""螺纹联接的防松"", 《煤矿机械》, vol. 30, no. 12, 15 December 2009 (2009-12-15), pages 163 - 164 *
项忠霞等: ""螺纹联接防松方法的评述"", 《机械设计》, no. 11, 30 November 1996 (1996-11-30), pages 1 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015000317A1 (en) * 2013-07-03 2015-01-08 Xu Songlin Anti-loosening cylindrical threaded part
WO2015000316A1 (en) * 2013-07-03 2015-01-08 Xu Songlin Anti-loosening cylindrical threaded part
WO2019205956A1 (en) * 2018-04-23 2019-10-31 Xu Songlin Threaded joint preventing self-rotation in loosening direction

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