CN103291729A - Anti-loosening threaded part - Google Patents
Anti-loosening threaded part Download PDFInfo
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- CN103291729A CN103291729A CN2013102756767A CN201310275676A CN103291729A CN 103291729 A CN103291729 A CN 103291729A CN 2013102756767 A CN2013102756767 A CN 2013102756767A CN 201310275676 A CN201310275676 A CN 201310275676A CN 103291729 A CN103291729 A CN 103291729A
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Abstract
The invention discloses an anti-loosening 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, a wedge-shaped inclined plane which forms an included angle alpha or an included angle beta with a longitudinal center axis of the internal thread or the external thread is arranged at the root of the internal thread or the external thread, and tan alpha or tan beta is smaller than a dynamic friction factor between contact surfaces of both the wedge-shaped inclined plane and the internal thread or the external thread. After the internal threaded part and the external threaded part are mutually tightened, the surface of the internal thread or the external thread and the wedge-shaped inclined plane form a mutually close contact structure which is a horizontal locking structure, and as long as the surface of the internal thread or the external thread and the wedge-shaped inclined plane are mutually closely contacted through pretightening force, effective looseness prevention of cylindrical threaded part connecting pairs which are provided with threaded surfaces and made of various materials can be achieved.
Description
Technical field
The present invention relates to a kind of anti-loosening threaded piece.
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.
Summary of the invention
Technical problem to be solved by this invention is: in order to overcome the above-mentioned deficiency of Spiralock cylindrical thread spare, the invention provides a kind of anti-loosening threaded piece, as long as pretightening force can make between internal thread or externally threaded surface and the wedge shape inclined-plane and closely contact mutually, just can realize cylindrical thread spare connection pair effectively locking of various material thread surface.
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, be not covered with locking material on internal thread and the externally threaded surface, the wedge shape inclined-plane that is angle α or angle β with internal thread or externally threaded longitudinal central axis line is arranged at the bottom of internal thread or the externally threaded tooth, tan α or tan β are less than the dynamic friction factor between wedge shape inclined-plane and internal thread or the externally threaded surface of contact, screw mutually between inner thread piece and the external thread piece tighten after, it is mutually tight contacting structure between internal thread or externally threaded surface and the wedge shape inclined-plane, 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 VDA235-101 standard of formulating according to German automobiles TIA, dynamic friction factor between the internal and external screw thread of internal and external screw thread spare should be greater than 0.15, and tan α or tan β can not become 0 (because internal thread or externally threaded longitudinal central axis line can not on the wedge shape inclined-plane), thus preferred tan α or tan β greater than 0 less than 0.15.
The invention has the beneficial effects as follows: above-mentioned anti-loosening threaded piece, as long as can making between internal thread or externally threaded surface and the wedge shape inclined-plane, pretightening force closely contacts mutually, just can realize cylindrical thread spare connection pair effectively locking of various material thread surface.Above-mentioned anti-loosening threaded piece, 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 that screws mutually after tightening between inner thread piece and the external thread piece of the first embodiment of the present invention connects secondary center vertical profile schematic side view;
Fig. 2 is the local enlarged diagram of Fig. 1;
Fig. 3 is that the threaded piece that screws mutually after tightening between inner thread piece and the external thread piece of the second embodiment of the present invention connects secondary center vertical profile schematic side view;
Fig. 4 is the local enlarged diagram of Fig. 3;
Among the figure: 1, inner thread piece, 2, external thread piece, 3, internal thread, 4, outside thread, 5, the longitudinal central axis line, 6, the wedge shape inclined-plane.
Embodiment
Below by specific embodiment anti-loosening threaded piece of the present invention is described in further detail.
As shown in Figure 1 and Figure 2, anti-loosening threaded piece comprises inner thread piece 1 and external thread piece 2, and wherein: as shown in Figure 1, 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; Be not covered with locking material on the surface of internal thread 3 and outside thread 4; As shown in Figure 2, the wedge shape inclined-plane 6 that is angle α with the longitudinal central axis line 5 of outside thread 4 is arranged at the bottom of the tooth of outside thread 4; Tan α is less than the dynamic friction factor between the surface of contact of wedge shape inclined-plane 6 and internal thread 3; As shown in Figure 1, 2, screw mutually between inner thread piece 1 and the external thread piece 2 tighten after, be mutual closely contacting structure between the surface of internal thread 3 and the wedge shape inclined-plane 6.Described tan α greater than 0 less than 0.15.
As shown in Figure 3, Figure 4, anti-loosening threaded piece comprises inner thread piece 1 and external thread piece 2, and wherein: as shown in Figure 3, 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; Be not covered with locking material on the surface of internal thread 3 and outside thread 4; As shown in Figure 4, the wedge shape inclined-plane 6 that is angle β with the longitudinal central axis line 5 of internal thread 3 is arranged at the bottom of the tooth of internal thread 3; Tan β is less than the dynamic friction factor between the surface of contact of wedge shape inclined-plane 6 and outside thread 4; Shown in Fig. 3,4, screw mutually between inner thread piece 1 and the external thread piece 2 tighten after, be mutual closely contacting structure between the surface of outside thread 4 and the wedge shape inclined-plane 6.Described tan β greater than 0 less than 0.15.
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 (2)
1. anti-loosening threaded piece, 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, be not covered with locking material on internal thread and the externally threaded surface, the wedge shape inclined-plane that is angle α or angle β with internal thread or externally threaded longitudinal central axis line is arranged at the bottom of internal thread or the externally threaded tooth, screw mutually between inner thread piece and the external thread piece tighten after, be mutually tight contacting structure between internal thread or externally threaded surface and the wedge shape inclined-plane, it is characterized in that: tan α or tan β are less than the dynamic friction factor between wedge shape inclined-plane and internal thread or the externally threaded surface of contact.
2. anti-loosening threaded piece according to claim 1 is characterized in that: tan α or tan β greater than 0 less than 0.15.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310275676.7A CN103291729B (en) | 2013-07-03 | 2013-07-03 | Anti-loosening threaded piece |
| EP14820287.2A EP3018367A4 (en) | 2013-07-03 | 2014-04-15 | Anti-loosening threaded part |
| KR1020157035814A KR20160003315A (en) | 2013-07-03 | 2014-04-15 | Anti-loosening threaded part |
| PCT/CN2014/075346 WO2015000318A1 (en) | 2013-07-03 | 2014-04-15 | Anti-loosening threaded part |
| CA2915891A CA2915891C (en) | 2013-07-03 | 2014-04-15 | Anti-loosening threaded part |
| US14/898,842 US20160153486A1 (en) | 2013-07-03 | 2014-04-15 | Anti-loosening threaded part |
| JP2016520250A JP2016524681A (en) | 2013-07-03 | 2014-04-15 | Locking screw member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310275676.7A CN103291729B (en) | 2013-07-03 | 2013-07-03 | Anti-loosening threaded piece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103291729A true CN103291729A (en) | 2013-09-11 |
| CN103291729B CN103291729B (en) | 2015-12-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310275676.7A Active CN103291729B (en) | 2013-07-03 | 2013-07-03 | Anti-loosening threaded piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103291729B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015000318A1 (en) * | 2013-07-03 | 2015-01-08 | Xu Songlin | Anti-loosening threaded part |
| CN104819195A (en) * | 2015-04-15 | 2015-08-05 | 李延春 | Loosening-prevention type bolt |
| CN109185323A (en) * | 2018-11-27 | 2019-01-11 | 北京理工大学 | It can inhibit the anti-loosening threaded pair and checknut part of interface sliding |
| CN112272739A (en) * | 2018-06-19 | 2021-01-26 | 日本八幡持股株式会社 | Anti-loosening metal external thread |
| WO2022174758A1 (en) * | 2021-02-17 | 2022-08-25 | 许松林 | Fastener for preventing self-turning motion in loosening direction |
| WO2022179467A1 (en) * | 2021-02-23 | 2022-09-01 | 许松林 | Thread pair for preventing automatic rolling movement in loosening direction |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN201714813U (en) * | 2010-07-01 | 2011-01-19 | 上海振高螺母有限公司 | Anti-loose internal thread structure |
| US20120195713A1 (en) * | 2010-12-17 | 2012-08-02 | Shanghai Detroit Precision Fastener Co., Ltd. | Fastening member with external threads and threaded fastening assembly |
| CN202946514U (en) * | 2012-08-10 | 2013-05-22 | 青岛德才装饰安装工程有限公司 | Anti-loose self-locking nut and bolt |
| CN203335597U (en) * | 2013-07-03 | 2013-12-11 | 许松林 | Anti-loosening threaded part |
-
2013
- 2013-07-03 CN CN201310275676.7A patent/CN103291729B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN201714813U (en) * | 2010-07-01 | 2011-01-19 | 上海振高螺母有限公司 | Anti-loose internal thread structure |
| US20120195713A1 (en) * | 2010-12-17 | 2012-08-02 | Shanghai Detroit Precision Fastener Co., Ltd. | Fastening member with external threads and threaded fastening assembly |
| CN202946514U (en) * | 2012-08-10 | 2013-05-22 | 青岛德才装饰安装工程有限公司 | Anti-loose self-locking nut and bolt |
| CN203335597U (en) * | 2013-07-03 | 2013-12-11 | 许松林 | Anti-loosening threaded part |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015000318A1 (en) * | 2013-07-03 | 2015-01-08 | Xu Songlin | Anti-loosening threaded part |
| CN104819195A (en) * | 2015-04-15 | 2015-08-05 | 李延春 | Loosening-prevention type bolt |
| CN112272739A (en) * | 2018-06-19 | 2021-01-26 | 日本八幡持股株式会社 | Anti-loosening metal external thread |
| CN112272739B (en) * | 2018-06-19 | 2022-05-10 | 日本八幡持股株式会社 | Anti-loosening metal external thread |
| CN109185323A (en) * | 2018-11-27 | 2019-01-11 | 北京理工大学 | It can inhibit the anti-loosening threaded pair and checknut part of interface sliding |
| CN109185323B (en) * | 2018-11-27 | 2020-09-29 | 北京理工大学 | Anti-loosening thread pair capable of inhibiting interface slippage and anti-loosening thread piece |
| WO2022174758A1 (en) * | 2021-02-17 | 2022-08-25 | 许松林 | Fastener for preventing self-turning motion in loosening direction |
| WO2022179467A1 (en) * | 2021-02-23 | 2022-09-01 | 许松林 | Thread pair for preventing automatic rolling movement in loosening direction |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103291729B (en) | 2015-12-16 |
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Effective date of registration: 20180823 Address after: 215400 Taicang science and Technology Industrial Park, Suzhou, Jiangsu (two West Side) Patentee after: SUZHOU DTFLOCK PRECISION FASTENER CO.,LTD. Address before: 215600 Suzhou, Zhangjiagang, Jiangsu, Yang Shi Town, New Town Road, 15 buildings 603 rooms Patentee before: Xu Songlin |
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Effective date of registration: 20240131 Address after: 201800, 3rd Floor, Building 7, No. 1055 Fuhai Road, Jiading Industrial Zone, Shanghai Patentee after: SHANGHAI DETROIT PRECISION FASTENER Co.,Ltd. Country or region after: China Address before: 215400 Taicang science and Technology Industrial Park, Suzhou, Jiangsu (two West Side) Patentee before: SUZHOU DTFLOCK PRECISION FASTENER CO.,LTD. Country or region before: China |