CN2307148Y - Self-locking stop nut pair - Google Patents
Self-locking stop nut pair Download PDFInfo
- Publication number
- CN2307148Y CN2307148Y CN 97234751 CN97234751U CN2307148Y CN 2307148 Y CN2307148 Y CN 2307148Y CN 97234751 CN97234751 CN 97234751 CN 97234751 U CN97234751 U CN 97234751U CN 2307148 Y CN2307148 Y CN 2307148Y
- Authority
- CN
- China
- Prior art keywords
- nut
- eccentric cam
- holding hole
- self
- eccentric
- 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
Links
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 abstract description 6
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000003044 adaptive effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910000926 A-3 tool steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Bolts, Nuts, And Washers (AREA)
Abstract
The utility model relates to a fastening piece. The fastening piece is tied on a screw bolt, the utility model is composed of the screw bolt and two nuts screwed on the screw bolt, and the two nuts are respectively an eccentric nut of an eccentric cam, which is arranged at one end, and a contained nut of a concentrical (or an eccentric) contained hole for threads, which is arranged at the other end. The end parts of the eccentric cam and the contained hole are respectively with guide chamferings. Thus, the utility model has the advantages of reasonable structure, convenient manufacture, low cost, reliable fastening, favorable anti-loosing effect, etc. The utility model can be widely used in violent vibrative occasions, or in environments having alternate stress with periodicity.
Description
The utility model relates to a kind of fastening piece, especially a kind of pair of nut that prevents nut loosening.
Usually, the way that prevents nut loosening is to add compression spring between nut and fastener, perhaps have two plain nuts successively reinforcing tighten.But, in the frequent occasion of vibration, loosening phenomenon still can appear.
For this reason, the someone designs the nut of a band cone and the nut of a band taper hole, two nuts and bolt all eccentric (CN86204074U)." prevent become flexible pair of nut " (CN87216533U) then will have in cone and the taper hole one with place nut thread decentraction, and another is concentric.During use, be screwed into one by one, and reinforcing tightens, then can prevent nut loosening to a certain extent.But, owing to must be provided with bigger tapering in this class design proposal, thereby in the occasion of frequent vibration, loosening phenomenon still can appear in nut.
For this reason, " locking double nut " (CN2064836U) then is provided with tenon on lower nut, and this tenon is to screw in the set tapped hole of upper cap nut, and two nuts screw mutually with connecting thread and fuse and this connecting thread and internal thread decentraction.After the installation, lower nut is fixed, upper cap nut is tightened in rotation, then with the bolt jam-packed, arrives and to prevent the effect become flexible.But, comparatively complicated because of said structure, make trouble, make it the expectancy that difficulty has practical application.
The purpose of this utility model provides a kind of simple and reasonable for structure, and is easy to make, with low cost, and fastening reliable, anti-loosing effect is self-locking lock nut pair preferably.Particularly, even with spanner back tightening nut is wherein unscrewed 90 °-180 ° artificially, still there is good self-locking expanding force in the utility model, makes it can not get loose under the environment of fierceness vibrations in the same old way.
Major scheme of the present utility model is: described pair of nut is respectively an end and is provided with the eccentric nut of eccentric cam and an end and is provided with containing nut with screw thread concentric (or eccentric) holding hole; And, be respectively equipped with the guiding chamfering in the end of eccentric cam and holding hole.Because mainly being reasonable use guiding chamfering, the utility model realizes that the eccentric cam of pair of nut imports in the holding hole.Make the equal zero draft of described eccentric cam and holding hole; Usually the design parameter of pair of nut meets following condition:
(1) the diameter phi A=of eccentric cam (M+1)～(S-1) mm;
(2) height h=H-(0.2～0.5) mm of eccentric cam;
(3) the guiding chamfering α of eccentric cam and holding hole=5 °～60 °;
(4) degree of depth C=of the angle of deflection of eccentric cam and holding hole (0.1-1.0) t;
(5) nt of the depth H of holding hole=(0.2-0.7);
In the formula: S be the nut opposite side distance from;
M is the screw thread nominal diameter of nut;
N is total effect number of turns of nut;
T is a pitch.
Degree of eccentricity E can decide according to the screw thread manufacturing tolerances and the actual size of nut-screw.
The decision design parameter of pair of nut of the present utility model meets following condition:
(1) the diameter phi A=of eccentric cam (S+M)/2;
(2) height h=H-(0.2～0.5) mm of eccentric cam;
(3) angle [alpha]=20 of the guiding chamfering (8) of eccentric cam and holding hole °～30 °;
(4) degree of depth C=of the angle of deflection of eccentric cam and holding hole (0.2～0.4) t;
(5) depth H of holding hole=(0.35～0.45) nt;
In the formula: S be the nut opposite side distance from;
M is the screw thread nominal diameter of nut;
N is total number of active coils of nut;
T is a pitch.
In addition, the aperture φ B of described holding hole can equal the diameter phi A of eccentric cam, and manufacturing tolerances is that unit bore system is advisable for 3 grades-6 grades.Can adopt materials such as A3 steel, No. 45 steel, copper, stainless steel to process as required.
The profile of above-mentioned pair of nut can be according to using needs, makes Hexagon, square or circle etc., is widely used for fierceness such as railway, bridge, pile driver, jarring machine, metal forming machinery, line belt, compressor and vibrates and have in the environment of completely reserved stress.
Because the utility model designs on a nut and is shaped on a holding hole, and is provided with adaptive guiding chamfering in its end; And on another nut, be provided with an adaptive eccentric cam and guiding chamfering, and utilize both adaptive containment relationships dexterously.When using, it is tightened on the same screw rod, promptly produce axial expanding force, thereupon, the eccentric cam of eccentric nut is clamp-oned in the holding hole that contains nut.Under the effect of eccentric cam, make to produce radially expanding force between nut and the screw rod, thereby reach the locking fastening purpose of self-locking.
Therefore, the utlity model has characteristics such as simple and reasonable for structure, easy to make, with low cost, fastening, that connection is reliable, and the self-locking anti-loosing effect is good.Has fastening locking function when especially it not only screws, unscrew 90 °-180 ° even will carry on the back tight nut artificially, even more for a long time, also still have enough radially expanding forces (self-lock force) because of eccentric cam and the equal zero draft of holding hole, make it under the environment of fierceness vibrations, can not get loose in the same old way.
Fig. 1 is a kind of structural representation of facing of eccentric nut of the present utility model;
Fig. 2 is a kind of side-looking structural representation with part section of eccentric nut of the present utility model;
Fig. 3 is a kind of structural representation of facing of containing nut of the present utility model;
Fig. 4 is a kind of side-looking structural representation with part section of containing nut of the present utility model.
Below by embodiment, the utility model is described specifically.
Embodiment: on a M20 nut, process a concentric holding hole (2), the aperture φ B of holding hole is 25mm, and depth H=5mm contains nut (5) and constitute; And processing is shaped on an eccentric cam (3) on another M20 nut, its throw of eccentric E=0.35mm, and the height h of eccentric cam is 4.5mm, the diameter phi A=25mm of eccentric cam constitutes eccentric nut (4).The angle of being located at the guiding chamfering (8) of eccentric cam (3) end and holding hole (2) end is 25 °, and the degree of depth C of guiding chamfering (8) is 0.5mm.This total number of active coils n to the pair of nut screw thread is 5 circles, and its pitch t is 2.5mm.
Claims (4)
1, a kind of self-locking lock nut pair, by screw rod with revolve two nuts provided thereon and form, it is characterized in that described nut is respectively an end and is provided with the eccentric nut (4) of eccentric cam (3) and the containing nut (5) that an end is provided with the holding hole concentric with screw thread (2); And be respectively equipped with guiding chamfering (8) in the end of eccentric cam (3) and holding hole (2).
2, self-locking lock nut pair as claimed in claim 1 is characterized in that described eccentric cam (3) and holding hole (2) tapering are zero, and the design parameter of pair of nut meets following condition:
(1) straight φ A=(M+1)～(S-1) mm of eccentric cam;
(2) height h=H-(0.2～0.5) mm of eccentric cam;
(3) angle [alpha]=5 of the guiding chamfering (8) of eccentric cam and holding hole °～60 °;
(4) degree of depth C=of the angle of deflection of eccentric cam and holding hole (0.1～1.0) t;
(5) depth H of holding hole=(0.2～0.7) nt;
In the formula: S be the nut opposite side distance from;
M is the screw thread nominal diameter of nut;
N is total number of active coils of nut;
T is a pitch.
3, self-locking lock nut pair as claimed in claim is characterized in that described eccentric cam (3) and holding hole (2) tapering are zero, and its decision design parameter meets following condition:
(1) the diameter phi A=of eccentric cam (S+M)/2;
(2) height h=H-(0.2-0.5) mm of eccentric cam;
(3) the guiding chamfering α of eccentric cam and holding hole=20 °～30 °;
(4) degree of depth C=of the angle of deflection of eccentric cam and holding hole (0.2-0.4) t;
(5) nt of the depth H of holding hole=(0.35-0.45);
In the formula: S be the nut opposite side distance from;
M is the screw thread nominal diameter of nut;
N is total number of active coils of nut;
T is a pitch.
4,, it is characterized in that the diameter phi A of the aperture φ B=eccentric cam (3) of described holding hole (2), and manufacturing tolerances is 3 grades-6 grades of unit bore systems as claim 1 or 2 or 3 described self-locking lock nut pairs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97234751 CN2307148Y (en) | 1997-06-05 | 1997-06-05 | Self-locking stop nut pair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97234751 CN2307148Y (en) | 1997-06-05 | 1997-06-05 | Self-locking stop nut pair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2307148Y true CN2307148Y (en) | 1999-02-10 |
Family
ID=33946021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97234751 Expired - Fee Related CN2307148Y (en) | 1997-06-05 | 1997-06-05 | Self-locking stop nut pair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2307148Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102431056A (en) * | 2010-07-23 | 2012-05-02 | P·皮埃雷 | Improvements in or relating to cutting machines |
| CN108916197A (en) * | 2018-08-15 | 2018-11-30 | 黄万强 | Anti-loosening bolt and nut lock solid structure |
-
1997
- 1997-06-05 CN CN 97234751 patent/CN2307148Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102431056A (en) * | 2010-07-23 | 2012-05-02 | P·皮埃雷 | Improvements in or relating to cutting machines |
| CN108916197A (en) * | 2018-08-15 | 2018-11-30 | 黄万强 | Anti-loosening bolt and nut lock solid structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |