CN202338550U - Pull type self-locking bolt - Google Patents
Pull type self-locking bolt Download PDFInfo
- Publication number
- CN202338550U CN202338550U CN2011204573413U CN201120457341U CN202338550U CN 202338550 U CN202338550 U CN 202338550U CN 2011204573413 U CN2011204573413 U CN 2011204573413U CN 201120457341 U CN201120457341 U CN 201120457341U CN 202338550 U CN202338550 U CN 202338550U
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- China
- Prior art keywords
- nut
- screw rod
- pull
- type self
- circular cone
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
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- 230000002401 inhibitory effect Effects 0.000 claims description 11
- 230000008961 swelling Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 239000010721 machine oil Substances 0.000 abstract description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Mutual Connection Of Rods And Tubes (AREA)
Abstract
A pull-type self-locking bolt relates to a self-locking bolt, a screw rod (7) penetrates through the lower part of a middle through hole (3) of a rod body, a nut (1) is in threaded connection with the upper end of the screw rod, a conical block (9) forms expansion on the lower part of the middle through hole, and an anti-rotation bulge (8) corresponds to an expansion groove (5); the utility model discloses a twist and twist the end soon through revolving, make the external screw thread of twisting the end lower part of twisting connect with the nut screw thread of work piece opposite side, then force the expanding groove widen of the body of rod lower part by the toper piece of screw rod lower part, then make external screw thread inflation and nut realize locking, need pull down the utility model discloses the time at first revolve twist the nut, make the toper piece relieve the pressure to the reaming, in using inject the machine oil that has certain consistency in screw rod and reaming, can play the utility model discloses an antirust action; the utility model discloses it is rational in infrastructure, the locking effect is superior to current self-locking bolt, can ensure the driving safety of railway, has taken precautions against the emergence that the bolt drops the phenomenon effectively.
Description
[technical field]
The utility model relates to a kind of self-locking screw, specifically the utility model relate to a kind of on high ferro bridge fence or railroad rail backplate steel plate are lived rolling stock, use in pull-type self-locking screw.
[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 utility model discloses a kind of pull-type self-locking screw; The utility model has utilized circular cone that the reaming in the body of rod bottom is held out against effect, makes the utility model tighten the back and produces expansion by outside thread, realizes self-locking locking; Guarantee railway operation safety, taken precautions against the generation that fastening piece that bolt falling causes comes off.
In order to realize the purpose of said invention, the utility model adopts following technological scheme:
A kind of pull-type self-locking screw; Comprise bolt, nut and check lock lever; 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 the middle part perforation of perforation by screwing; Perforation bottom to end opening end is provided with at least one breathing groove at the middle part, and said breathing groove outside connects to the outside thread of body of rod outer edge surface; Said check lock lever comprises screw rod and circular cone; Lower end at screw rod is provided with circular cone; Said circular cone is up-small and down-big circular cone bench-type structure; On the circular cone outer edge surface of circular cone bench-type structure, be provided with the rotation inhibiting of breathing groove equal number protrudingly, the protruding width of said rotation inhibiting is less than the breathing groove; Screw rod is penetrated by the perforation bottom, middle part of the body of rod, and the upper end wire connection of said nut and screw rod forms the swelling to perforation bottom, middle part by circular cone, the protruding corresponding breathing groove of wherein said rotation inhibiting.
Described pull-type self-locking screw, the lower end of perforation is provided with reaming at the middle part.
Described pull-type self-locking screw, screw rod in the perforation of middle part and middle part perforation are Spielpassung.
Described pull-type self-locking screw, said outer rim of screwing end is a polygon.
Described pull-type self-locking screw, the said polygon of screwing end comprises hexagon and quadrangle.
Described pull-type self-locking screw, the outer rim of said nut are polygon.
Described pull-type self-locking screw, the said polygon of nut comprises hexagon and quadrangle.
Described pull-type self-locking screw is at nut and screw on the screw rod between the end and be with spring.
Through above-mentioned disclosure, the beneficial effect of the utility model is:
The said pull-type self-locking screw of the utility model, the utility model be through screwing end, makes the outside thread of screwing the end bottom and the nut wire connection of workpiece opposite side; Circular cone by said screw rod bottom forces the breathing groove of body of rod bottom to broaden then; Outside thread is expanded and nut is realized locking, wherein said breathing groove be set to three preferable, but preferably be no more than six; At first screw said nut in the time of the utility model need being pulled down; Make circular cone remove pressure, in screw rod and reaming, inject machine oil in the use, can play the rust inhibition of the utility model with certain density to reaming; The utility model 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 the structural member composite structure schematic representation of the utility model;
Fig. 2 is the structural representation of the utility model;
Fig. 3 is the middle part perforation and the reaming structural representation of the utility model;
In the drawings: 1, nut; 2, screw end; 3, middle part perforation; 4, outside thread; 5, breathing groove; 6, reaming; 7, screw rod; 8, rotation inhibiting is protruding; 9, circular cone; 10, spring.
[embodiment]
Embodiment with reference to following can explain the utility model in more detail; But the utility model is not limited to these embodiments' compound mode.
Pull-type self-locking screw in conjunction with described in accompanying drawing 1,2 or 3 comprises bolt, nut 1 and check lock lever, and said bolt top is set to screw end 2; Said outer edge surface of screwing end 2 is a polygon; The said polygon of screwing end 2 comprises hexagon and quadrangle, and the preferred hexagon of the utility model is an outside thread 4 screwing end 2 lower pole body outer edge surfaces; Hold 2 upper-end surfaces to body of rod lower end surface to be provided with the middle part perforation 3 of perforation by screwing; Lower end in middle part perforation 3 is provided with reaming 6, is provided with at least one breathing groove 5 on boring a hole 3 bottoms to end opening end reaming 6 at the middle part, and said breathing groove 5 outsides connect to the outside thread 4 of body of rod outer edge surface; Said check lock lever comprises screw rod 7 and circular cone 9; Be provided with circular cone 9 in the lower end of screw rod 7; Said circular cone 9 is up-small and down-big circular cone bench-type structure; On circular cone 9 outer edge surfaces of circular cone bench-type structure, be provided with the rotation inhibiting of breathing groove 5 equal numbers protrudingly 8, the width of said rotation inhibiting protruding 8 is less than breathing groove 5; Screw rod 7 is penetrated by 3 bottoms of boring a hole, the middle part of the body of rod, and the screw rods 7 in the middle part perforation 3 be Spielpassung with middle part perforation 3, the upper end wire connection of said nut 1 and screw rod 7; The outer rim of nut 1 is a polygon; The said polygon of nut 1 comprises hexagon and quadrangle, and the preferred six-sided nut 1 of the utility model is at nut 1 and screw on the screw rod 7 of end between 2 and be with spring 10; Form the bore a hole swelling of 3 bottoms of middle part, the protruding 8 corresponding breathing grooves 5 of wherein said rotation inhibiting by the circular cone 9 of screw rod 7 lower ends.
Implement the described pull-type self-locking screw of the utility model; The main use at the plate body of track backplate or vehicle, bridge with during plate body is connected; Wherein the nut of wire connection should not expose nut and be advisable tightening back outside thread 4 on outside thread 4, or uses double nut to be screwed on the outside thread 4; During use screw rod 7 is penetrated middle part perforation 3 by the reaming 6 of body of rod bottom, screw with screw rod 7 by nut 1 and be connected, wherein socket spring 10 on screw rod 7; Said spring 10 is " C " shape structure, and the rotation inhibiting on the said circular cone 9 protruding 8 is corresponding with breathing groove 5, then the utility model is penetrated in the hole of link; Utilize nut and outside thread 4 wire connections and tighten at the opposite side of link, screw said nut 1 then, at this moment under the pulling of nut 1; Said circular cone 9 begins to rise and breathing groove 5 is opened; Force the breathing groove 5 of bottom to broaden, the bottom of outside thread 4 begins outwards stressed, the lower end of outside thread 4 just with nut check; At first screw during the utility model loosening and unload nut 1 down in dismounting; Make circular cone 9 lose pressure to reaming 6; Just can unload the utility model through screwing end 2 then, comparatively firm if circular cone 9 is connected with reaming 6, through the upper end of hammering screw rod 7.
The utility model does not detail part and is existing technology.
The embodiment who selects for use in this article for the purpose of open the utility model currently thinks to suit, but will be appreciated that, the utility model is intended to comprise that all belong to the interior embodiment's of this design and the utility model scope all changes and improvement.
Claims (8)
1. pull-type self-locking screw; Comprise bolt, nut (1) and check lock lever; It is characterized in that: said bolt top is set to screw end (2), is outside thread (4) screwing end (2) lower pole body outer edge surface, is provided with the middle part perforation (3) of perforation to body of rod lower end surface by screwing end (2) upper-end surface; Perforation (3) bottom to end opening end is provided with at least one breathing groove (5) at the middle part, and said breathing groove 5 outsides connect to the outside thread (4) of body of rod outer edge surface; Said check lock lever comprises screw rod (7) and circular cone (9); Be provided with circular cone (9) in the lower end of screw rod (7); Said circular cone (9) is up-small and down-big circular cone bench-type structure; On circular cone (9) outer edge surface of circular cone bench-type structure, be provided with and the rotation inhibiting of breathing groove (5) equal number protruding (8), the width of said rotation inhibiting protruding (8) is less than breathing groove (5); Screw rod (7) is penetrated by perforation (3) bottom, middle part of the body of rod, and the upper end wire connection of said nut (1) and screw rod (7) forms the swelling to perforation (3) bottom, middle part by circular cone (9), protruding (8) the corresponding breathing grooves (5) of wherein said rotation inhibiting.
2. pull-type self-locking screw according to claim 1 is characterized in that: the lower end in middle part perforation (3) is provided with reaming (6).
3. pull-type self-locking screw according to claim 1 is characterized in that: the screw rod (7) in the middle part perforation (3) is a Spielpassung with middle part perforation (3).
4. pull-type self-locking screw according to claim 1 is characterized in that: said outer rim of screwing end (2) is a polygon.
5. pull-type self-locking screw according to claim 4 is characterized in that: the said polygon of screwing end (2) comprises hexagon and quadrangle.
6. pull-type self-locking screw according to claim 1 is characterized in that: the outer rim of said nut (1) is a polygon.
7. pull-type self-locking screw according to claim 6 is characterized in that: the said polygon of nut (1) comprises hexagon and quadrangle.
8. pull-type self-locking screw according to claim 1 is characterized in that: at nut (1) and screw on the screw rod (7) between the end (2) and be with spring (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204573413U CN202338550U (en) | 2011-11-17 | 2011-11-17 | Pull type self-locking bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204573413U CN202338550U (en) | 2011-11-17 | 2011-11-17 | Pull type self-locking bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202338550U true CN202338550U (en) | 2012-07-18 |
Family
ID=46487242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204573413U Expired - Lifetime CN202338550U (en) | 2011-11-17 | 2011-11-17 | Pull type self-locking bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202338550U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410295A (en) * | 2011-11-17 | 2012-04-11 | 中铁十五局集团有限公司 | Pull type self-locking bolt |
| CN105452686A (en) * | 2014-04-11 | 2016-03-30 | 刘兴邦 | Double-bolt loose proof method |
-
2011
- 2011-11-17 CN CN2011204573413U patent/CN202338550U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410295A (en) * | 2011-11-17 | 2012-04-11 | 中铁十五局集团有限公司 | Pull type self-locking bolt |
| CN105452686A (en) * | 2014-04-11 | 2016-03-30 | 刘兴邦 | Double-bolt loose proof method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120718 |