CN203923808U - A kind of anti-loosening service sleeve assembly for rail fastener system - Google Patents
A kind of anti-loosening service sleeve assembly for rail fastener system Download PDFInfo
- Publication number
- CN203923808U CN203923808U CN201420277457.2U CN201420277457U CN203923808U CN 203923808 U CN203923808 U CN 203923808U CN 201420277457 U CN201420277457 U CN 201420277457U CN 203923808 U CN203923808 U CN 203923808U
- Authority
- CN
- China
- Prior art keywords
- service sleeve
- bolt
- loosening
- fastener system
- rail fastener
- 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 - Fee Related
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Abstract
For an anti-loosening service sleeve assembly for rail fastener system, effectively to improve anti-loosening performance, reduce railway maintenance workload.Comprise bolt and service sleeve, the external thread section of bolt is tightened in the internal thread hole of service sleeve, and the front end of described bolt external thread section has along its axis to being recessed on cone hole, and the bottom of service sleeve internal thread hole has the frustum corresponding with this cone hole.
Description
Technical field
The utility model relates to railroad track, particularly a kind of anti-loosening service sleeve assembly for rail fastener system.
Background technology
Fastener system is as one of vitals of track structure, not only lay quantity large, with high content of technology, and the construction cycle is long, need to it be continued research and development and be improved.The bolt using in fastener system, by the frictional force between the screw thread contact surface of bolt and service sleeve, plays the object of fastening spring.Although indices all meets the requirements when mounted, but in long-term military service process, repeated action due to wheel rail force, make to occur gap between the screw thread contact surface of bolt and service sleeve, the elastic-restoring force of spring makes bolt have the trend of outside back-out simultaneously, in the course of time, just can there is loosening phenomenon in railway spike.
Along with the increase of China railways freight volume, axle heavily improves constantly, and the stress of fastener is further aggravated, and the workload that railway maintenance staff twists bolt again also will increase, and the research of the locking measure of contacting piece system has important practical significance.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of anti-loosening service sleeve assembly for rail fastener system, effectively to improve anti-loosening performance, reduces railway maintenance workload.
It is as follows that the utility model solves the technical scheme that its technical problem adopts:
A kind of anti-loosening service sleeve assembly for rail fastener system of the present utility model, comprise bolt and service sleeve, the external thread section of bolt is tightened in the internal thread hole of service sleeve, it is characterized in that: the front end of described bolt external thread section has along its axis to being recessed on cone hole, and the bottom of service sleeve internal thread hole has the frustum corresponding with this cone hole.
The beneficial effects of the utility model are, when keeping bolt circle column type external surface that frictional force is provided, can also additionally provide frictional force in bolt bottom, so have good anti-loosening performance; Simple in structure, easy for installation, and can effectively reduce railway maintenance workload.
Accompanying drawing explanation
This manual comprises following six width accompanying drawings:
Fig. 1 is the structural representation of a kind of anti-loosening service sleeve assembly for rail fastener system of the utility model;
Fig. 2 is the sectional view of a kind of anti-loosening service sleeve assembly service sleeve for rail fastener system of the utility model;
Fig. 3 is the sectional view of a kind of anti-loosening service sleeve assembly bolt for rail fastener system of the utility model;
Fig. 4 is the left view of a kind of anti-loosening service sleeve assembly bolt for rail fastener system of the utility model;
Fig. 5 is the left view of a kind of anti-loosening service sleeve assembly bolt for rail fastener system of the utility model;
Fig. 6 is the left view of a kind of anti-loosening service sleeve assembly bolt for rail fastener system of the utility model.
The title of member shown in figure and corresponding mark: bolt 10, cone hole 11, service sleeve 20, frustum 21.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
With reference to Fig. 1, a kind of anti-loosening service sleeve assembly for rail fastener system of the utility model, comprises bolt 10 and service sleeve 20, and the external thread section of bolt 10 is tightened in the internal thread hole of service sleeve 20.With reference to Fig. 3, the front end of described bolt 10 external thread sections has along its axis to being recessed on cone hole 11.With reference to Fig. 2, the bottom of service sleeve 20 internal thread holes has the frustum 21 corresponding with this cone hole 11.
With reference to Fig. 1, when screwing bolt 10, bolt 10 front-end-cones are cheated the frustum 21 that first 11 surfaces can touch the bottom protrusion of service sleeve 20 internal thread holes, and frustum 21 can stop being rotated further of bolt.Now apply a larger torque, can pass through the distortion of service sleeve 20,11 surfaces, cone hole are contacted completely with frustum 21 surfaces, 11 surfaces, cone hole are superimposed with frustum 21.Cancel after clamp load torque, 11 surfaces, cone hole just can provide a larger frictional force with the binding site of frustum 21, to improve the anti-loose ability of bolt 10.
The utility model has changed existing bolt and service sleeve assembly only increases the mode of frictional force along hand of spiral dimension, the working space that increases frictional force is converted to the base plane of bolt 10, when keeping bolt 10 external screw thread faces that frictional force is provided, can also additionally provide frictional force in bolt 10 bottoms.
With reference to Fig. 4, the cone wall of described cone hole 11, frustum 21 can be taper seat.For farthest improving the anti-loosening property of bolt 10, with reference to Fig. 5 and Fig. 6, the cone wall in described cone hole 11 should consist of many planes, and after applying larger clamp load torque, the distortion of the circular cone face cone wall of frustum 21 fits with the cone hole cone of plane more than 11 wall.
Some principles of a kind of anti-loosening service sleeve assembly for rail fastener system of the above the utility model that just explains through diagrams, be not the utility model to be confined to shown in and in described concrete structure and the scope of application, therefore the corresponding modify being likely utilized every and equivalent, all belong to the scope of the claims that the utility model is applied for.
Claims (2)
1. the anti-loosening service sleeve assembly for rail fastener system, comprise bolt (10) and service sleeve (20), the external thread section of bolt (10) is tightened in the internal thread hole of service sleeve (20), it is characterized in that: the front end of described bolt (10) external thread section has along its axis to being recessed on cone hole (11), and the bottom of service sleeve (20) internal thread hole has the frustum (21) corresponding with this cone hole (11).
2. a kind of anti-loosening service sleeve assembly for rail fastener system as claimed in claim 1, is characterized in that: the cone wall in described cone hole (11) consists of many planes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420277457.2U CN203923808U (en) | 2014-05-28 | 2014-05-28 | A kind of anti-loosening service sleeve assembly for rail fastener system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420277457.2U CN203923808U (en) | 2014-05-28 | 2014-05-28 | A kind of anti-loosening service sleeve assembly for rail fastener system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203923808U true CN203923808U (en) | 2014-11-05 |
Family
ID=51819663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420277457.2U Expired - Fee Related CN203923808U (en) | 2014-05-28 | 2014-05-28 | A kind of anti-loosening service sleeve assembly for rail fastener system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203923808U (en) |
-
2014
- 2014-05-28 CN CN201420277457.2U patent/CN203923808U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |