CN201027756Y - High-strength screw - Google Patents
High-strength screw Download PDFInfo
- Publication number
- CN201027756Y CN201027756Y CNU2007200363867U CN200720036386U CN201027756Y CN 201027756 Y CN201027756 Y CN 201027756Y CN U2007200363867 U CNU2007200363867 U CN U2007200363867U CN 200720036386 U CN200720036386 U CN 200720036386U CN 201027756 Y CN201027756 Y CN 201027756Y
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- thread
- screw
- nut
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Abstract
The utility model discloses a high-strength bolt comprising a screw and a nut; a tooth-shaped screw thread is arranged at the inner side of the nut; one inclined surface of the cuniform inclined surface of the tooth-shaped thread of the nut is composed of two intersectant inclined surfaces with a certain angle. The screw of the high-strength bolt bears even load and improves the strength of the bolt; and the clearance problem of screw which can cause the looseness of tightening element is solved; compared with the prior common torque-type tightening element, the utility model has more tightening force, so the utility model can replace expensive self-lock tightening element; and can be loosened or tightened without losing of tightening force, and the utility model is easy to assemble.
Description
Technical field
The utility model relates to a kind of fastening piece, relates in particular to a kind of screw.
Background technique
The use of fastening piece is very extensive, the basic component that industrial products such as electronics, chemical industry, traffic, building, military affairs, space flight must use, along with development and national economy, requirement to screw is more and more higher, lock screw, high-strength screw, anti-corrosion screw arise at the historic moment, in the prior art, satisfy the needs of various special industries mostly by the mechanical property that improves material.
Summary of the invention
The utility model provides a kind of high-strength screw by improving the immanent structure of nut.
The utility model is achieved by the following technical solution: high-strength screw, comprise screw and nut, and described nut inboard is a V-thread, a skew back face on the wedge shape inclined-plane of V-thread is made of two inclined-planes that intersect several angle in the described nut.
Two crossing angles in inclined-plane are 150 degree on the one skew back face on described wedge shape inclined-plane.
The spacing of the gap ratio standard thread of described nut inner thread is big.
In the prior art, in the standard thread thread form, great majority clamp load centralization on article one screw thread, the standard thread nut demonstrates and screws the screw thread upper stress in article one and concentrate, other screw threads are partly contact or contact, and this is to cause owing to inevitable production error reaches the resiliently deformable that takes place when tightening threaded male fastener.And the tapped hole of the utility model high-strength screw nut, the externally threaded crest of master serew is tight against on the wedge shape inclined-plane that is pressed in nut inner thread, it is to form a kind of contact of screw thread continuously along whole length of thread engagement, show a kind of load allocating very uniformly, showed that also the load on each bolt thread all is applied on the tip of thread, therefore avoided in the common stressed concentrated phenomenon that occurs of screw bolt root, the internal thread of this high-strength screw nut, bear 17% of whole loads from article one screw thread, until 12.5% load on the last item screw thread does not wait, clamping force is evenly distributed on each screw thread more, it is more even that the clamping load allocating that screws along whole screw thread is got, and improves the intensity of screw.
Compared with prior art, the utlity model has following advantage:
1, solved the only screw thread carrying problem that causes that easily fastening piece is loosening, photoelasticity studies have shown that high-strength screw screw thread load allocating is even.
In the common shape-V thread of prior art, article one screws screw thread and bears most of load that clamps.The utility model high-strength screw screw thread has been avoided the problem of this load centralization, because this screw thread design is to make to form a kind of contact of screw thread continuously between the wedge shape inclined-plane of externally threaded crest and internal thread, this continuous wedge shape closely that exists between outside thread and internal thread screws, not only prevented the side direction relaxation exercise, and because the influence on wedge shape inclined-plane, it can be along whole helical surface, produce very strong rubbing contact coupling mechanism force, the stress distribution that photoelasticity research style photo clearly demonstrates two kinds of thread profile is even.Test shows: the percentage that each of high-strength screw screw-threaded coupling screws load that screw thread bears almost is the same, the more important thing is that the high-strength screw screw thread is lower by 18% than the percentage of standard thread load, it is too concentrated that these characteristics have avoided article one to screw on the screw thread load.Therefore, improve the intensity of screw, reduced bolt fracture, thereby guaranteed safety such as machinery, equipment, engineering.
2, solved the thread pitch problem that causes that easily fastening piece is loosening, had more clamping force, the self-locking fastener of alternative costliness than the common moment of torsion type of prior art fastening piece.
In a single day the utility model high-strength screw screw thread has the clamping load, externally threaded crest just is against on the angled inclined-plane of internal thread tightly, because the mechanical dominance of angular dependence between the wedge shape inclined-plane of this uniqueness and the outside thread, lateral movement is restricted, also just stop the transverse movement of vibration, thereby kept locking.Endurance test by the lateral load detection facility proves: the utility model high-strength screw wedge thread clinch fastener is superior to other self-locking fastener, after standard lock nut and common torque take-up nut check inefficacy, high-strength screw screw-threaded coupling nut still can keep locking, run into when damaging when the frequency of vibration being increased to bolt itself, high-strength screw screw-threaded coupling nut still can keep locking.When the threaded male fastener of internal thread fastening piece of the present utility model and standard matches, forming one between tip of thread and the internal thread wedge shape inclined-plane outside screws from locking wire, this wedge thread clinch fastener other clinch fastener with regard to alternative those a lot of costs has been arranged, as the fastening piece that relies on spring washer, nylon chock or Chemical Felter to lock.
3, turn on or tighten, and do not lose fastening force
Some equipment product often need be turned on its fastening piece, and the utility model high-strength screw wedge thread clinch fastener can repeated disassembled and assembled, and does not lose the coupling mechanism force of fastening piece, and this is an important feature that is superior to other clinch fastener.The coupling mechanism force of other clinch fastener is not destroyed through dismounting, is weakened greatly exactly.Than the easier assembling of other fastening piece, under immunization with gD DNA vaccine, the utility model high-strength screw wedge lock screw thread is bigger than the spacing of standard thread, and this just for simplifying assembly manipulation, has created condition in particular for the spin assembling.Compare with the common moment of torsion fastening piece of prior art, this wedge thread clinch fastener is regardless of being by hand or being used for automatic assembly machine, all very easily assemblings.
Description of drawings
Fig. 1 is the structural representation of the inboard V-thread of the utility model embodiment nut.
Being labeled as in the accompanying drawing: 2, inclined-plane, 3, the inclined-plane, 4, angle, 5, the internal thread spacing.
Embodiment
A kind of high-strength screw, comprise screw and nut, described nut inboard is a V-thread, the spacing 5 of described nut inner thread is bigger than the spacing of standard thread, a skew back face on the wedge shape inclined-plane of V-thread is made of two inclined-planes 2,3 that intersect several angle in the described nut, and two inclined-plane 2,3 crossing angles 4 are 150 degree on the skew back face on described wedge shape inclined-plane.
Claims (3)
1. high-strength screw comprises screw and nut, and described nut inboard is a V-thread, it is characterized in that: a skew back face on the wedge shape inclined-plane of V-thread is made of two inclined-planes (2) that intersect several angle, (3) in the described nut.
2. high-strength screw according to claim 1 is characterized in that: the angle (4) that intersect two inclined-planes (2), (3) on the skew back face on described wedge shape inclined-plane is 150 degree.
3. high-strength screw according to claim 1 and 2 is characterized in that: the spacing of described nut inner thread (5) is bigger than the spacing of standard thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200363867U CN201027756Y (en) | 2007-04-05 | 2007-04-05 | High-strength screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200363867U CN201027756Y (en) | 2007-04-05 | 2007-04-05 | High-strength screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201027756Y true CN201027756Y (en) | 2008-02-27 |
Family
ID=39131965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200363867U Expired - Fee Related CN201027756Y (en) | 2007-04-05 | 2007-04-05 | High-strength screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201027756Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106725785A (en) * | 2016-12-24 | 2017-05-31 | 上海施必康医疗器械有限公司 | A kind of orthopaedics internal fixation system |
-
2007
- 2007-04-05 CN CNU2007200363867U patent/CN201027756Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106725785A (en) * | 2016-12-24 | 2017-05-31 | 上海施必康医疗器械有限公司 | A kind of orthopaedics internal fixation system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080227 |