CN102518638A - Self-locking bolt capable of automatically locking and loosening - Google Patents
Self-locking bolt capable of automatically locking and loosening Download PDFInfo
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- CN102518638A CN102518638A CN2011103656220A CN201110365622A CN102518638A CN 102518638 A CN102518638 A CN 102518638A CN 2011103656220 A CN2011103656220 A CN 2011103656220A CN 201110365622 A CN201110365622 A CN 201110365622A CN 102518638 A CN102518638 A CN 102518638A
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- circular cone
- spring
- connecting rod
- locking
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Abstract
The invention provides a self-locking bolt capable of automatically locking and loosening and relates to a self-locking bolt. A spring (5) is sleeved on a connecting rod (4); a thread head (11) at the upper end of the connecting rod (4) passes through an internal thread (3) at a screwing end (2) so as to be arranged in an upper dent (1); the upper end of the spring (5) props against a step of an unthreaded hole (6) at the lower part of the internal thread (3), and the lower end of the spring (5) props against the upper end surface of a conical block (10); the conical block (10) is inserted in the port part of the lower end of the unthreaded hole (6), and the width of a collapsible groove (9) is increased by virtue of the conical block (10) so as to form the expansion self-locking of an external thread (7). According to the self-locking bolt, the propping action of the conical block for the conical hole of a lower rod body is utilized, so that the external thread at the lower end of the rod body and a screw hole are locked after the self-locking bolt provided by the invention is screwed down, thus the railways train operation safety is ensured; and the connecting rod and the spring in the bolt are of an integral design and interact with each other, thus preventing the occurrence of drop.
Description
[technical field]
The present invention relates to a kind of self-locking screw, specifically the present invention relates to the self-locking screw that a kind of auto lock that on high ferro bridge fence or railroad rail backplate steel plate rolling stock alive, uses loosens.
[background technique]
Known; Safety of railway traffic is related to the big problem of national economy; Because the shock-effect in the railway operation, employed various component need pass through that relevant departments carry out a large amount of experiments and through post-installation review, its Security for confirmation, durability and stability; Wherein the use amount of bolt is extremely huge; Commercially available self-locking screw kind is more, mostly through on the outside thread of bolt, locking mechanism being set, also has the spring sheet of use or rubber to form locking " self-locking "; But its using effect is unsatisfactory; Just a lot of self-locking screws receive erosion by wind and rain and vibrations for a long time, and spring sheet just can fatigue occur and lose auto-lock function, especially rubber in case tired or agingly just have no auto-lock function; Auto-lock function forfeiture phenomenon also can appear in the obstruction that the self-locking screw that locking mechanism is set on the outside thread receives rusty stain behind the rain erosion and dust, and can't discover; State Planning Commission's key industry project of arranging for example, by common " China Star " train accomplished of 12 enterprises, scientific research institutions and universities, the main cause that withdraws from railway is in the maintenance, the Ministry of Railways finds the potential safety hazard of certain bolt looseness; And domestic a lot of rolling stock derailment accidents are derived from bolt looseness.
[summary of the invention]
In order to overcome the deficiency in the background technique; The invention discloses the self-locking screw that a kind of auto lock loosens, the present invention has utilized the hold out against effect of circular cone to bottom body of rod cone shape hole, and the outside thread and the screw that make the present invention tighten body of rod lower end, back are realized locking; Guaranteed railway operation safety; Because connecting rod in the said bolt and spring belong to the one design, and interact, and have taken precautions against the generation that comes off.
In order to realize the object of the invention, the present invention adopts following technological scheme:
The self-locking screw that a kind of auto lock loosens; Comprise bolt, connecting rod and spring; Said bolt top is set to screw end, is outside thread screwing end lower pole body outer edge surface, holds upper-end surface to body of rod lower end surface to be provided with upper recess, internal thread and the unthreaded hole of perforation successively by screwing; The upper/lower terminal of said connecting rod is respectively equipped with thread head, circular cone; The diameter of connecting rod is less than thread head, circular cone; Said circular cone is the big cone structure in little bottom, top; Be provided with at least one breathing groove in the bottom of unthreaded hole, said breathing groove outside connects to the outside thread of body of rod outer edge surface; On connecting rod, be with spring; The thread head of small end is arranged in the upper recess after passing the internal thread of screwing end; The upper end of said spring withstands on the step of internal thread bottom unthreaded hole; The lower end of spring withstands on the upper-end surface of circular cone, and circular cone is inserted in the lower end oral area of unthreaded hole, makes said breathing groove increase width by circular cone and forms externally threaded expansion self-locking.
The self-locking screw that described auto lock loosens is provided with the big cone shape hole in little bottom, top in the unthreaded hole bottom, circular cone is inserted in the said cone shape hole.
The self-locking screw that described auto lock loosens is provided with in the bottom surfaces of circular cone and screws groove.
The self-locking screw that described auto lock loosens, the said groove of screwing is cross or yi word pattern or interior six sides or interior four directions.
The self-locking screw that described auto lock loosens, said outer rim of screwing end is a polygon.
The self-locking screw that described auto lock loosens, the said polygon of screwing end comprises hexagon and quadrangle.
Through above-mentioned disclosure, the invention has the beneficial effects as follows:
The self-locking screw that auto lock according to the invention loosens, the present invention to the holding out against of bottom body of rod cone shape hole, forces the breathing groove of body of rod bottom to broaden through circular cone; Then make outside thread and screw realize locking, wherein said breathing groove be set to three preferable, but preferably be no more than six; Since in unthreaded hole, be provided with spring, also comparatively laborsaving when pulling down, in unthreaded hole, inject machine oil in the use with certain density; Can play rust inhibition, in order to demonstrate concrete structure of the present invention, so that connecting rod is drawn in the accompanying drawing is thinner; During actual fabrication, as long as just said connecting rod can through internal thread; The present invention is rational in infrastructure, and locking effect is superior to existing self-locking screw, can guarantee the traffic safety of railway, has taken precautions against the generation of bolt falling phenomenon effectively.
[description of drawings]
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a bolt arrangement schematic representation of the present invention;
Fig. 3 is a spring structure schematic representation of the present invention;
Fig. 4 is a bar linkage structure schematic representation of the present invention;
Fig. 5 is a circular cone polycrystalline substance schematic representation of the present invention;
In the drawings: 1, upper recess; 2, screw end; 3, internal thread; 4, connecting rod; 5, spring; 6, unthreaded hole; 7, outside thread; 8, cone shape hole; 9, breathing groove; 10, circular cone; 11, thread head; 12, screw groove.
[embodiment]
Embodiment with reference to following can explain the present invention in more detail; But the present invention is not limited to these embodiments' compound mode.
The self-locking screw that loosens in conjunction with the auto lock described in accompanying drawing 1,2 or 3; Comprise bolt, connecting rod 4 and spring 5; Said bolt top is set to hexagon or quadrangle is screwed end 2; Preferred hexagon is screwed end 2, is outside thread 7 screwing end 2 lower pole body outer edge surfaces, holds 2 upper-end surfaces to body of rod lower end surface to be provided with upper recess 1, internal thread 3, unthreaded hole 6 and the cone shape hole 8 of perforation successively by screwing; The upper/lower terminal of said connecting rod 4 is respectively equipped with thread head 11, circular cone 10; The diameter of connecting rod 4 is less than thread head 11, circular cone 10; Said circular cone 10 is the big cone structure in little bottom, top; Be provided with the big cone shape hole 8 in little bottom, top in unthreaded hole 6 bottoms, the bottom of unthreaded hole 6 and cone shape hole 8 are provided with at least one breathing groove 9, and said breathing groove 9 outsides connect to the outside thread 7 of body of rod outer edge surface; On connecting rod 4, be with spring 5; The thread head 11 of connecting rod 4 upper ends is arranged in the upper recess 1 after passing the internal thread 3 of screwing end 2; The upper end of said spring 5 withstands on the step of internal thread 3 bottom unthreaded holes 6; The lower end of spring 5 withstands on the upper-end surface of circular cone 10, and circular cone 10 is inserted in the lower end oral area of said cone shape hole 8, makes said breathing groove 9 increase the expansion self-locking that width forms outside thread 7 by circular cone 10; Wherein be provided with in the bottom surfaces of circular cone 10 and screw groove 12, the said groove 12 of screwing is cross or yi word pattern or interior six sides or interior four directions.
The self-locking screw that the said auto lock of embodiment of the present invention loosens, the main use has on the link of screw, and the screw degree of depth and the end 2 lower external thread 7 length coupling of screwing of the present invention; During use spring 5 is enclosed within on the connecting rod 4; Utilize the groove 12 of screwing of circular cone 10 bottom surfaces to pass through instrument; Make the thread head 11 of connecting rod 4 upper ends be screwed into internal thread 3 backs and get in the upper recess 1 of screwing end 2, the upper end of at this moment said spring 5 withstands on the excessive step of internal thread 3 bottoms and unthreaded hole 6, and the lower end of spring 5 withstands on the upper-end surface of circular cone 10; Then with the corresponding link screw in the hole of fastener; Tighten and screw end 2 and make bolt according to the invention bottom and screw bottom begin to feed to cone shape hole 8 near, at this moment said circular cone 10 to make breathing groove 9 become big, said outside thread 7 lower ends begin to expand and screw forms self-locking; The present invention tightens the back bolt and can not occur becoming flexible, and only need screw the said end 2 of screwing during maintenance once more and just can; When the present invention need change, screw the said end 2 of screwing, the synchronous thread head 11 that knocks, the present invention just can unload down.
The present invention does not detail part and is existing technology.
The embodiment who selects for use in this article for open the object of the invention currently thinks to suit, but will be appreciated that, the present invention is intended to comprise that all belong to the interior embodiment's of this design and the scope of the invention all changes and improvement.
Claims (6)
1. self-locking screw that auto lock loosens; Comprise bolt, connecting rod (4) and spring (5); It is characterized in that: said bolt top is set to screw end (2); Screwing end (2) lower pole body outer edge surface is outside thread (7), is provided with upper recess (1), internal thread (3) and the unthreaded hole (6) of perforation successively to body of rod lower end surface by screwing end (2) upper-end surface; The upper/lower terminal of said connecting rod (4) is respectively equipped with thread head (11), circular cone (10); The diameter of connecting rod (4) is less than thread head (11), circular cone (10); Said circular cone (10) is the big cone structure in little bottom, top; Be provided with at least one breathing groove (9) in the bottom of unthreaded hole (6), said breathing groove (9) outside connects to the outside thread (7) of body of rod outer edge surface; On connecting rod (4), be with spring (5); After passing the internal thread (3) of screwing end (2), the thread head (11) of connecting rod (4) upper end is arranged in the upper recess (1); The upper end of said spring (5) withstands on the step of internal thread (3) bottom unthreaded hole (6); The lower end of spring (5) withstands on the upper-end surface of circular cone (10); Circular cone (10) is inserted in the lower end oral area of unthreaded hole (6), makes said breathing groove (9) increase the expansion self-locking that width forms outside thread (7) by circular cone (10).
2. the self-locking screw that auto lock according to claim 1 loosens is characterized in that: be provided with the big cone shape hole in little bottom, top (8) in unthreaded hole (6) bottom, circular cone (10) is inserted in the said cone shape hole (8).
3. the self-locking screw that auto lock according to claim 1 loosens is characterized in that: be provided with in the bottom surfaces of circular cone (10) and screw groove (12).
4. the self-locking screw that auto lock according to claim 3 loosens is characterized in that: the said groove (12) of screwing is cross or yi word pattern or interior six sides or interior four directions.
5. the self-locking screw that auto lock according to claim 1 loosens is characterized in that: said outer rim of screwing end (2) is a polygon.
6. the self-locking screw that auto lock according to claim 5 loosens is characterized in that: the said polygon of screwing end (2) comprises hexagon and quadrangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110365622.0A CN102518638B (en) | 2011-11-17 | 2011-11-17 | Self-locking bolt capable of automatically locking and loosening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110365622.0A CN102518638B (en) | 2011-11-17 | 2011-11-17 | Self-locking bolt capable of automatically locking and loosening |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102518638A true CN102518638A (en) | 2012-06-27 |
| CN102518638B CN102518638B (en) | 2014-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110365622.0A Active CN102518638B (en) | 2011-11-17 | 2011-11-17 | Self-locking bolt capable of automatically locking and loosening |
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| Country | Link |
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| CN (1) | CN102518638B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114437A (en) * | 2015-07-31 | 2015-12-02 | 河南航天精工制造有限公司 | Self-locking bolt |
| CN107524682A (en) * | 2017-09-01 | 2017-12-29 | 宁波正宇紧固件有限公司 | A kind of fastener being easily installed |
| CN108867946A (en) * | 2018-06-26 | 2018-11-23 | 周焱春 | A kind of mounting process of glass curtain wall |
| CN110477990A (en) * | 2019-08-09 | 2019-11-22 | 詹菲 | The garnishment safety device of running fire Clip Applier |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2267344Y (en) * | 1996-08-02 | 1997-11-12 | 葛永生 | Internal expanding self-locking type bolt |
| WO1998010198A1 (en) * | 1996-09-03 | 1998-03-12 | Yoshiji Tutikawa | Locking bolt and bolt locking method |
| CN202338551U (en) * | 2011-11-17 | 2012-07-18 | 中铁十五局集团有限公司 | Self-locking bolt capable of automatically locking and loosening |
-
2011
- 2011-11-17 CN CN201110365622.0A patent/CN102518638B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2267344Y (en) * | 1996-08-02 | 1997-11-12 | 葛永生 | Internal expanding self-locking type bolt |
| WO1998010198A1 (en) * | 1996-09-03 | 1998-03-12 | Yoshiji Tutikawa | Locking bolt and bolt locking method |
| CN202338551U (en) * | 2011-11-17 | 2012-07-18 | 中铁十五局集团有限公司 | Self-locking bolt capable of automatically locking and loosening |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114437A (en) * | 2015-07-31 | 2015-12-02 | 河南航天精工制造有限公司 | Self-locking bolt |
| CN107524682A (en) * | 2017-09-01 | 2017-12-29 | 宁波正宇紧固件有限公司 | A kind of fastener being easily installed |
| CN108867946A (en) * | 2018-06-26 | 2018-11-23 | 周焱春 | A kind of mounting process of glass curtain wall |
| CN110477990A (en) * | 2019-08-09 | 2019-11-22 | 詹菲 | The garnishment safety device of running fire Clip Applier |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102518638B (en) | 2014-01-15 |
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