CN103291730A - Anti-loose cylindrical threaded part - Google Patents
Anti-loose cylindrical threaded part Download PDFInfo
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- CN103291730A CN103291730A CN2013102757577A CN201310275757A CN103291730A CN 103291730 A CN103291730 A CN 103291730A CN 2013102757577 A CN2013102757577 A CN 2013102757577A CN 201310275757 A CN201310275757 A CN 201310275757A CN 103291730 A CN103291730 A CN 103291730A
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Abstract
The invention discloses an anti-loose cylindrical threaded part which comprises an internal threaded part and an external threaded part. A cylindrical internal thread is formed in an inner hole of the internal threaded part, a cylindrical external thread is formed on a screw of the external threaded part, a cylindrical surface parallel to the longitudinal central axis of the internal thread is formed in the inner hole of the internal threaded part, the inner diameter of the cylindrical surface is larger than the minimum inner diameter of the internal thread, anti-loose materials are not coated on the surface of the internal thread, the surface of the external thread and the cylindrical surface, the cylindrical surface structurally closely contacts with the crest of the external thread, namely, the cylindrical surface and the crest are structurally transversely locked, so that loose of the cylindrical internal threaded part and the cylindrical external threaded part can be effectively prevented without longitudinal expansion force of the threaded part and a workpiece. The anti-loose cylindrical threaded part is applicable to loose prevention for various cylindrical threaded parts for rigid fastened connection and elastic connection, and is higher in anti-loose stability.
Description
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 has the longitudinal central axis line with internal thread to be parallel to each other in the endoporus of inner thread piece, the internal diameter of periphery is greater than the minimum diameter of internal thread, 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 periphery and the externally threaded crest, 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 a kind of 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 a kind of 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 a kind of anti-loosening cylindrical thread spare of the present invention is described in further detail.
As shown in Figure 1, a kind of 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 internal thread 3 to be parallel to each other at the bottom of the tooth of internal thread 3, the internal diameter of periphery 6 is greater than the minimum diameter of internal thread 3; 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 outside thread 4.
As shown in Figure 2, a kind of 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 internal thread 3 to be parallel to each other in the endoporus of inner thread piece 1, the internal diameter of periphery 6 is greater than the minimum diameter of internal thread 3; 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 outside thread 4.
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 has the longitudinal central axis line with internal thread to be parallel to each other in the endoporus of inner thread piece, the internal diameter of periphery is greater than the minimum diameter of internal thread, 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 periphery and the externally threaded crest.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102757577A CN103291730A (en) | 2013-07-03 | 2013-07-03 | Anti-loose cylindrical threaded part |
| PCT/CN2014/075345 WO2015000317A1 (en) | 2013-07-03 | 2014-04-15 | Anti-loosening cylindrical threaded part |
| JP2016520249A JP2016524680A (en) | 2013-07-03 | 2014-04-15 | Locking cylindrical screw member |
| KR1020157035812A KR20160003314A (en) | 2013-07-03 | 2014-04-15 | Anti-loosening cylindrical threaded part |
| EP14818845.1A EP3018366A4 (en) | 2013-07-03 | 2014-04-15 | Anti-loosening cylindrical threaded part |
| US14/898,848 US20160115990A1 (en) | 2013-07-03 | 2014-04-15 | Anti-loosening cylindrical threaded part |
| CA2915889A CA2915889A1 (en) | 2013-07-03 | 2014-04-15 | Anti-loosening cylindrical threaded part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102757577A CN103291730A (en) | 2013-07-03 | 2013-07-03 | Anti-loose cylindrical threaded part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103291730A true CN103291730A (en) | 2013-09-11 |
Family
ID=49093116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102757577A Pending CN103291730A (en) | 2013-07-03 | 2013-07-03 | Anti-loose cylindrical threaded part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103291730A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790077A (en) * | 2013-11-29 | 2014-05-14 | 淮北龙盘工贸有限责任公司 | Environment-friendly and ecological adsorbent wallpaper |
| 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 |
Citations (8)
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| US271852A (en) * | 1883-02-06 | Duane hull | ||
| 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 |
| US5738472A (en) * | 1995-10-18 | 1998-04-14 | Honeybee Robotics Inc. | Modified locking thread form for fastener |
| CN2494889Y (en) * | 2001-08-15 | 2002-06-12 | 张永华 | Full thread locking nut |
| EP1391618A1 (en) * | 2002-08-23 | 2004-02-25 | HYDAC Electronic GmbH | Screw locking device |
| CN102261365A (en) * | 2010-04-22 | 2011-11-30 | (株)亚细亚Bolt | Screw configured to have improved anti-shock, anti-vibration, and fastening ability, and screw-type mechanical component |
| CN203335598U (en) * | 2013-07-03 | 2013-12-11 | 许松林 | Looseness-proof cylindrical threaded part |
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2013
- 2013-07-03 CN CN2013102757577A patent/CN103291730A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US271852A (en) * | 1883-02-06 | Duane hull | ||
| 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 |
| US5738472A (en) * | 1995-10-18 | 1998-04-14 | Honeybee Robotics Inc. | Modified locking thread form for fastener |
| CN2494889Y (en) * | 2001-08-15 | 2002-06-12 | 张永华 | Full thread locking nut |
| EP1391618A1 (en) * | 2002-08-23 | 2004-02-25 | HYDAC Electronic GmbH | Screw locking device |
| CN102261365A (en) * | 2010-04-22 | 2011-11-30 | (株)亚细亚Bolt | Screw configured to have improved anti-shock, anti-vibration, and fastening ability, and screw-type mechanical component |
| CN203335598U (en) * | 2013-07-03 | 2013-12-11 | 许松林 | Looseness-proof cylindrical threaded part |
Non-Patent Citations (4)
| Title |
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| 孙秀芳: ""螺纹联接自锁性能的分析"", 《山西广播电视大学学报》 * |
| 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》 * |
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Cited By (3)
| 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 |
| CN103790077A (en) * | 2013-11-29 | 2014-05-14 | 淮北龙盘工贸有限责任公司 | Environment-friendly and ecological adsorbent wallpaper |
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