CN201027758Y - Locking dowel with key - Google Patents
Locking dowel with key Download PDFInfo
- Publication number
- CN201027758Y CN201027758Y CNU2007200630389U CN200720063038U CN201027758Y CN 201027758 Y CN201027758 Y CN 201027758Y CN U2007200630389 U CNU2007200630389 U CN U2007200630389U CN 200720063038 U CN200720063038 U CN 200720063038U CN 201027758 Y CN201027758 Y CN 201027758Y
- Authority
- CN
- China
- Prior art keywords
- key
- locking
- stud
- utility
- model
- 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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- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The utility model relates to a lock screw peg with a key. The key point of the utility model is that at least two coattail key grooves are arranged at the outside of the bottom of the screw peg; a lock key is embedded in the coattail groove. The front part of the lock key is a guide part, and the rear part of the lock key is a ladder-shaped key handle. With the lock screw sleeve of the utility model, the installation work is convenient, and the screw sleeve can be directly screwed in the bottom hole; the installation is firm, and the screw sleeve does not rotate along with the outer screw element because of the rotation of an outer screw element, so the connection is reliable; and once installation fails, a special tool can be used for detaching and reinstalling.
Description
Technical field
The utility model relates to a kind of manufacturing of machine element, is specifically related to a kind of band key locking stud.
Background technique
In the connection procedure of aluminum-magnesium alloy body, usually adopt the stud that is screwed into the interference screw thread within it.And existing interference stud is general and the self-locking nut combination, and there are some shortcomings like this in this combination, the one, and the installation resisting moment that the installation of self-locking nut, decomposition moment are produced by magnitude of interference greater than match stud and body tapped hole.When practical set and decomposition, stud is usually twisted and is taken off, and causes the body thread damage, makes the inefficacy that is threaded.The 2nd, interference fit between stud and the aluminum alloy organism tapped hole make the internal and external threads material produce compressive strain in assembly process and after the assembling, and the compressive strain of material produces mounting torque and locking resistance.Along with operating time and vibration environment influence, residual stress reduces gradually, and the friction ractor of screw pair reduces gradually, and the reliability that causes being threaded reduces or inefficacy.Also therefore influence the quality and the safety of product.
Summary of the invention
The purpose of this utility model is: provide a kind of easy for installation, connect band key locking stud reliably, be used to overcome the existing defective of above-mentioned stud.
The technical solution of the utility model is: the stud bottom outside is provided with the keyway of at least two swallow-tail forms, and locking key is inlaid in the swallow-tail form keyway.
For further realizing the above purpose, the front end of the said locking key of the utility model is a targeting part, and the rear end is the key lever of band " ladder " type, and the circumcircle of this targeting part is less than its screw thread path, and the key lever circumcircle is less than its Major Diam.
Adopt locking stud of the present utility model, easy for installation, can directly stud be screwed in thread Pilot hole; Connect reliably, during the mounting or dismounting self-locking nut, can not cause the stud rotation because of self-locking nut rotates; After failure is installed, can use the special tool dismounting, reinstall; The outside thread of stud is a standard thread, and the bottom outlet screw thread can be processed with the regular screw threads screw tap.
Description of drawings
Fig. 1 is the utility model structural representation.
Plan view when Fig. 2 does not embed locking key for the utility model.
Fig. 3 is the structural representation of the utility model locking key.
Fig. 4 is the partial sectional view of the utility model Fig. 3 key lever.
1 stud among the figure, 2 locking keies, 3 swallow-tail form keyways.
Embodiment
Be provided with the keyway 3 of two (below the M6) or four (more than the M6) swallow-tail forms in stud 1 bottom outside, be embedded with locking key 2 in the swallow-tail form keyway 3, the front end of this locking key 2 is a targeting part, and the rear end is a key lever, and this key lever is " ladder " font.The length of targeting part accounts for 1/3rd to 1/5th of locking key 2 total lengths.The targeting part circumcircle of locking key 2 is less than its screw thread path, and the key lever circumcircle of locking key 2 is less than its Major Diam.Locking key 2 materials are the cold rolling moulding of G18NI9 of solid solution attitude.
Its working principle is: when stud 1 is installed, earlier stud 1 is screwed in the matrix interior threaded hole, with instrument locking key 2 is press fitted in the tapped hole, locking key 2 interferes with the matrix internal thread, makes stud be securely fixed in the matrix screw.
Claims (2)
1. band key locking stud is characterized in that: be provided with the keyway (3) of at least two swallow-tail forms in stud (1) bottom outside, locking key (2) is inlaid in the swallow-tail form keyway (3).
2. according to the described band key locking of claim 1 stud, it is characterized in that: the front end of said locking key (2) is a targeting part, and the rear end is band " ladder " type key lever; The circumcircle of the targeting part of locking key (2) is less than its screw thread path, and the key lever circumcircle of locking key (2) is less than its Major Diam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200630389U CN201027758Y (en) | 2007-04-24 | 2007-04-24 | Locking dowel with key |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200630389U CN201027758Y (en) | 2007-04-24 | 2007-04-24 | Locking dowel with key |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201027758Y true CN201027758Y (en) | 2008-02-27 |
Family
ID=39131967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200630389U Expired - Lifetime CN201027758Y (en) | 2007-04-24 | 2007-04-24 | Locking dowel with key |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201027758Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8544179B2 (en) | 2008-10-30 | 2013-10-01 | Vallourec Mannesmann Oil & Gas France | Inspection method of gauge for a self-locking threading of a tubular connection used in the oil industry |
-
2007
- 2007-04-24 CN CNU2007200630389U patent/CN201027758Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8544179B2 (en) | 2008-10-30 | 2013-10-01 | Vallourec Mannesmann Oil & Gas France | Inspection method of gauge for a self-locking threading of a tubular connection used in the oil industry |
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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: 20080227 |