CN204239430U - A kind of anti-theft nut - Google Patents
A kind of anti-theft nut Download PDFInfo
- Publication number
- CN204239430U CN204239430U CN201420585565.6U CN201420585565U CN204239430U CN 204239430 U CN204239430 U CN 204239430U CN 201420585565 U CN201420585565 U CN 201420585565U CN 204239430 U CN204239430 U CN 204239430U
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- CN
- China
- Prior art keywords
- fastener
- nut sleeve
- nut
- convex stupefied
- madial wall
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- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a kind of anti-theft nut, comprise: the fastener in the nut sleeve manufactured by metallic material and nut sleeve, when described anti-theft nut is installed and used, described nut sleeve around anti-theft nut axis rotary squeezing described in fastener, make described fastener outer side wall produce local or partial deformation; Especially make the screw thread of fastener madial wall there occurs larger deformation or displacement, cause the worm structure between anti-theft nut and the screw rod be attached thereto to create destruction.Cannot unload by rotating after fastener is fastening, and nut sleeve produces the slip of circumferencial direction relative to fastener, thus reach antitheft object.
Description
Technical field
The utility model relates to fastener areas, is specifically related to a kind of anti-theft nut.
Background technique
In some field, a large amount of needs antitheft, the lock nut of use, is such as arranged on the outdoor facility such as communication, electric power, railway, owing to using traditional plain nut, turn on easily via instrument, be therefore very easily stolen, so antitheft, lock nut must be used.The irregular profile of the employing that existing anti-theft nut has, just can be turned on, but thief is also easy to customize similar instrument according to the shape of nut is turned on nut by the instrument being equipped with custom-made; Also have the anti-theft nut adopting steel ball or steel pin structure, but when using, steel pin or steel ball do not touch screw rod, anti-theft nut still can oppositely screw off easily very much, and anti-theft effect is still undesirable.
Model utility content
Can worm structure be destroyed when technical problem to be solved in the utility model is to provide a kind of use, and the anti-theft nut that nut sleeve is rotated relative to fastening physical efficiency generation circumferencial direction.
The utility model is achieved through the following technical solutions: a kind of anti-theft nut, comprising: the nut sleeve manufactured by metallic material and the fastener be arranged in nut sleeve, and the shape of cross section of described nut sleeve outer side wall is the regular polygon on more than four limits; The first groove is provided with in the middle part of described nut sleeve, the madial wall of this first groove is provided with that at least one is parallel or through the plane of nut sleeve axis, or be provided with at least one to raised first convex stupefied of nut sleeve axial direction, or be provided with that at least one is parallel or through the plane of nut sleeve axis with at least one is to raised first convex stupefied of nut sleeve axial direction simultaneously; The first described bottom portion of groove is provided with the first through hole.
Described fastener is the cylindrical shape of hollow, the second circular through hole is provided with in the middle part of fastener, described fastener outer side wall is provided with that at least one is parallel or through the plane of fastener axis, or it is convex stupefied away from second of fastener axial direction projection to be provided with at least one, or to be provided with at least one parallel or through fastener axis plane convex stupefied away from second of fastener axial direction projection with at least one simultaneously.
The most weakness of described nut sleeve madial wall radial distance is slightly smaller than the distance of described fastener outer side wall radial distance biggest place apart from fastener axis apart from the distance of nut sleeve axis.
The sidewall of the first described through hole is the collar flange that axial direction projection is yearned in footpath, described fastener bottom is fixedly installed on this collar flange, is provided with continuous print screw thread or arranges the size interval with screw thread phase uniform pitch inside the madial wall of described fastener second through hole and collar flange.
Described anti-theft nut is not when using, and described fastener is fixedly installed in the through hole of described nut sleeve; When described anti-theft nut is installed and used, described nut sleeve rotates around fastener, the position of described nut sleeve madial wall projection and the position of described fastener outer side wall projection abut against, and extruding produces certain moment of torsion, the described fastener described in nut sleeve extruding, make the screw thread extruding screw in described fastener second through hole and produce certain distortion, described nut sleeve produces the rotation of circumferencial direction relative to fastener.
Further, the first described boss and the cross section of the second boss are semicircle.
Further, the top of described fastener is provided with at least two equally distributed wedge-shaped impressions.
Further, spaced 120 ° of described nut sleeve first groove madial wall is provided with 3 planes paralleled to the axis, and to be provided with 3 sliver transvers sections be semicircular convex stupefied to spaced 120 ° of described fastener outer side wall.
Further, described nut sleeve does not overlap with the axis of fastener but parallel, and described nut sleeve madial wall is connected by 2 facets by the arc surface that the arc surface that diameter is larger is less with diameter and forms, its larger arc surface be provided with one convex stupefied; Described fastener outer side wall is connected by 2 facets by the arc surface that the arc surface that diameter is larger is less with diameter and forms, its less arc surface be provided with one convex stupefied; The arc surface that described nut sleeve madial wall is less and the larger arc surface end of described fastener abut against, convex stupefied with the described fastener of described nut sleeve madial wall comparatively great circle cambered surface abuts against, and convex stupefied with the described nut sleeve madial wall of described fastener outer side wall abuts against.
Further, to be provided with 3 sliver transvers sections be that to be provided with 3 sliver transvers sections be semicircular convex stupefied to spaced 120 ° of semicircular convex stupefied, described fastener outer side wall to spaced 120 ° of described nut sleeve first groove madial wall.
Beneficial effect: pass through nut sleeve inner sidewall diameter less position when anti-theft nut of the present utility model uses to the extruding of fastener diameter larger portion position, make the local that there occurs outside fastener or partial deformation, especially make the screw thread of fastener madial wall there occurs larger deformation or displacement, cause the worm structure between anti-theft nut and the screw rod be attached thereto to create certain destruction.Fastener cannot unload by rotating, and nut sleeve produces certain slip of circumferencial direction relative to fastener, thus reaches antitheft object.
Accompanying drawing explanation
For ease of illustrating, the utility model is described in detail by following specific embodiment and accompanying drawing.
Fig. 1 is the schematic perspective view of the utility model anti-theft nut embodiment 2;
Fig. 2 is the plan view of the utility model anti-theft nut embodiment 2;
Fig. 3 is the schematic perspective view of the utility model anti-theft nut embodiment 3;
Fig. 4 is the plan view of the utility model anti-theft nut embodiment 3;
Fig. 5 is the plan view of the utility model anti-theft nut embodiment 4;
Fig. 6 is the plan view of the utility model anti-theft nut embodiment 5.
Wherein: 1 nut sleeve; 2 fasteners.
Embodiment
Further specific descriptions will be done by specific embodiment to the utility model below below in conjunction with accompanying drawing, but can not be interpreted as it is restriction to the utility model protection domain.
In description of the present utility model, needs are understood, and " the first through hole ", " the second through hole ", " the first groove ", " first is convex stupefied " and " second is convex stupefied " are for ease of describing the utility model and simplified characterization, instead of refer to specific title.In addition, common saying " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristics.Embodiment's schematic diagram that accompanying drawing provides is only the several of the utility model anti-theft nut, can not think that the utility model is only limitted to this several structure, when the ABC that those skilled in the art grasp and operative skill, the anti-theft nut of a series of similar structure can also be expanded.
Embodiment 1
A kind of anti-theft nut, comprising: the nut sleeve 1 manufactured by metallic material and the fastener 2 be arranged in nut sleeve 1, and the shape of cross section of described nut sleeve 1 outer side wall is the regular polygon on more than four limits; The first groove is provided with in the middle part of described nut sleeve 1, the madial wall of this first groove is provided with that at least one is parallel or through the plane of nut sleeve 1 axis, or be provided with at least one to raised first convex stupefied of nut sleeve 1 axial direction, or be provided with that at least one is parallel or through the plane of nut sleeve 1 axis with at least one is to raised first convex stupefied of nut sleeve 1 axial direction simultaneously; The first described bottom portion of groove is provided with the first through hole.
Described fastener 2 is the cylindrical shape of hollow, the second circular through hole is provided with in the middle part of fastener 2, described fastener 2 outer side wall is provided with that at least one is parallel or through the plane of fastener 2 axis, or it is convex stupefied away from second of fastener 2 axial direction projection to be provided with at least one, or to be provided with at least one parallel or through fastener 2 axis plane convex stupefied away from second of fastener 2 axial direction projection with at least one simultaneously.
The most weakness of described nut sleeve 1 madial wall radial distance is slightly smaller than the distance of described fastener 2 outer side wall radial distance biggest place apart from fastener 2 axis apart from the distance of nut sleeve 1 axis, by regulate the difference of this distance can adjusting nut cover 1 to skid relative to fastener 2 and produce circumferencial direction rotate needed for moment values, difference is less, required moment is less, difference is larger, and required moment is also larger.
The sidewall of the first described through hole is the collar flange that axial direction projection is yearned in footpath, described fastener 2 bottom is fixedly installed on this collar flange, is provided with continuous print screw thread or arranges the size interval with screw thread phase uniform pitch inside the madial wall of described fastener 2 second through hole and collar flange.
Described anti-theft nut is not when using, and described fastener 2 is fixedly installed in the through hole of described nut sleeve 1; When described anti-theft nut is installed and used, described nut sleeve 1 rotates around fastener 2, the position of described nut sleeve 1 madial wall projection and the position of described fastener 2 outer side wall projection abut against, and extruding produces certain moment of torsion, described nut sleeve 1 extrudes described fastener 2, make the screw thread extruding screw in described fastener 2 second through hole and produce certain distortion, described nut sleeve 1 produces the rotation of circumferencial direction relative to fastener 2.
Preferred, the first described boss and the cross section of the second boss are semicircle, and such arranging can be that nut sleeve 1 is more smooth and easy relative to the rotation of fastener 2.
A manufacture method for anti-theft nut, comprises the following steps:
Step one, by be shaped to after a columniform metal bar cutting some basal diameter be less than or equal to D1, highly be the cylindrical body of L, become blank.
Step 2, by the blank of step one in cold header in corresponding mould by sidewall forging and stamping for cross section is the regular polygon on more than four limits, upper surface and lower surface have circular chamfering, and basal diameter is more than or equal to D1, is highly L1.
Step 3, by the workpiece transfer after step 2 shaping in the corresponding mould of cold header, the first groove that a diameter is D1a is forged and pressed out downwards at the upper surface of workpiece, the first described groove madial wall forges and presses the plane having at least one to parallel to the axis, or forging and stamping have at least one to raised first convex stupefied of axial direction, or forge and press the plane that has at least one to parallel to the axis and at least one is to raised first convex stupefied of axial direction simultaneously, it is d1 that lower surface central protrusion forms a diameter, it is highly the cylindrical boss of l1, the diameter d 1 of described boss is less than the diameter D1a of described first groove.
Step 4, the boss of the workpiece of completing steps three is yearned for the punching press of upper surface direction in the mould of workpiece surface outside along workpiece spindle, the joint of boss and workpiece is broken to form the first through hole that diameter is d2a, d2a is more than or equal to d1, diameter d 1 due to described boss is less than the diameter of described groove, the the first through hole edge formed becomes the collar flange that axial direction projection is yearned in footpath, and the described workpiece with the first through hole and the first groove becomes the nut sleeve 1 of anti-theft nut; Described boss is the fastener 2 of anti-theft nut by forging and stamping in mould, diameter is d2, highly for l2, be the plane having at least one to parallel to the axis by the outer side wall punching press upsetting of boss, or it is convex stupefied away from second of axial direction projection to be provided with at least one, or to be provided with at least one plane paralleled to the axis convex stupefied away from second of axial direction projection with at least one simultaneously.
Step 5, axially push back in the first groove of nut sleeve 1 toward the first through hole direction by the described fastener 2 of completing steps four along nut sleeve 1, described fastener 2 bottom is fixed on the first through hole collar flange.
Step 6, by the method for punching press, is the second through hole being less than or equal to d2a by going out a diameter through the fastener 2 described in the first through hole along the axis of nut sleeve 1.
Step 7, passes through tapping method tapping continuous print screw thread at the inwall of the first described through hole and the inwall of the second through hole.
Embodiment 2
As depicted in figs. 1 and 2, relative to embodiment 1, difference is only: spaced 120 ° of described nut sleeve 1 first groove madial wall is provided with 3 planes paralleled to the axis, and to be provided with 3 sliver transvers sections be semicircular second convex stupefied to spaced 120 ° of described fastener 2 outer side wall.When anti-theft nut 1 carries out rotational fastener, the plane of nut sleeve 1 madial wall abuts and extrudes the second convex stupefied of fastener 2 outer side wall, the screw thread of fastener 2 is caused to produce certain destruction, when exceeding default moment, nut sleeve 1 is skidded relative to fastener 2 and is produced the rotation of circumferencial direction, thus fastener 2 cannot be unloaded.
Embodiment 3
As shown in Figure 3 and Figure 4, relative to embodiment 1, difference is only: described nut sleeve 1 does not overlap with the axis of fastener 2 but parallel, described nut sleeve 1 madial wall is connected by 2 facets by the arc surface that the arc surface that diameter is larger is less with diameter and forms, its larger arc surface be provided with one convex stupefied; Described fastener 2 outer side wall is connected by 2 facets by the arc surface that the arc surface that diameter is larger is less with diameter and forms, its less arc surface be provided with one convex stupefied; The arc surface that described nut sleeve 1 madial wall is less and the larger arc surface end of described fastener 2 abut against, convex stupefied with the described fastener 2 of described nut sleeve 1 madial wall comparatively great circle cambered surface abuts against, and convex stupefied with described nut sleeve 1 madial wall of described fastener 2 outer side wall abuts against.Because the axis of nut sleeve 1 with fastener 2 does not overlap, after nut sleeve 1 to be skidded relative to fastener 2 and is produced the rotation of circumferencial direction, the screw thread of the first through hole madial wall of nut sleeve 1 and the screw thread of fastener second through hole madial wall are broken into discontinuous screw thread, cause nut sleeve 1 more difficult relative to the rotation of fastener 2 circumferencial direction, the arc surface end that fastener 2 is larger when rotation 45 ° and the convex stupefied of nut sleeve 1 madial wall abut against, need very large moment that nut sleeve 1 just can be made to skid relative to fastener 2 and produce the rotation of circumferencial direction, when half-twist, due to threading dislocations, nut sleeve 1 is relative to the rotation difficulty of fastener 2 circumferencial direction, substantially can not make the convex stupefied extruding of the convex stupefied of nut sleeve 1 and fastener and skid.Due to the first through hole madial wall of described nut sleeve 1 also having screw thread, when described nut sleeve 1 and fastener 2 use conversely, nut sleeve 1 uses as fastener, after fastener 2 is tightened with the special spanner supporting with its outer side wall, nut sleeve 1 and fastener 2 joint disconnect, because described nut sleeve 1 not to overlap with the axis of fastener 2 but parallel, thus make the internal thread threading dislocations of the first through hole and the second through hole, nut sleeve 1 is more difficult relative to the rotation of fastener 2 circumferencial direction, thus reaches good anti-loose anti-theft effect.Embodiment 4
As shown in Figure 5, relative to embodiment 1, difference is only: to be provided with 3 sliver transvers sections be semicircular convex stupefied 3 planes paralleled to the axis to spaced 120 ° of described nut sleeve 1 first groove madial wall, spaced 120 ° of described fastener 2 outer side wall is provided with 3 planes paralleled to the axis, the top of described fastener 2 is provided with at least two equally distributed wedge-shaped impressions, the use of anti-theft nut through the long period can loosen unavoidably, now nut sleeve 1 can not play the effect that clamping fastener body 2 screws, by being provided with wedge-shaped impression, can by special sleeve barrel tool and wedge slot adaptation, further reinforcing is screwed to anti-theft nut, and the setting of wedge slot ensure that anti-theft nut can only rotate along the direction of tightening nut, in the other direction then cannot be stressed, still anti-theft nut cannot be outwarded winding.
Embodiment 5
As shown in Figure 6, relative to embodiment 1, difference is only: to be provided with 3 sliver transvers sections be that to be provided with 3 sliver transvers sections be semicircular convex stupefied to spaced 120 ° of semicircular convex stupefied, described fastener 2 outer side wall to spaced 120 ° of described nut sleeve 1 first groove madial wall.When anti-theft nut 1 carries out rotational fastener, first convex stupefied abutting of nut sleeve 1 madial wall also extrudes the second convex stupefied of fastener 2 outer side wall, the screw thread of fastener 2 is caused to produce certain destruction, when exceeding default moment, nut sleeve 1 is skidded relative to fastener 2 and is produced the rotation of circumferencial direction, thus fastener 2 cannot be unloaded.
The less position of nut sleeve inner sidewall diameter is passed through to the extruding of fastener diameter larger portion position when anti-theft nut of the present utility model uses, fastener is made to there occurs the deformation of local or part, especially make the screw thread of fastener madial wall there occurs larger deformation, cause the worm structure between anti-theft nut and the screw rod be attached thereto to create destruction.Fastener cannot unload by rotating, and nut sleeve produces the slip of circumferencial direction relative to fastener, thus reaches antitheft object.
More than show and describe basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and the claimed scope of the utility model is defined by appending claims, specification and equivalent thereof.
Claims (6)
1. an anti-theft nut, comprise: the nut sleeve (1) manufactured by metallic material and the fastener (2) be arranged in nut sleeve (1), is characterized in that: the shape of cross section of described nut sleeve (1) outer side wall is the regular polygon on more than four limits; Described nut sleeve (1) middle part is provided with the first groove, the madial wall of this first groove is provided with that at least one is parallel or through the plane of nut sleeve (1) axis, or be provided with at least one to raised first convex stupefied of nut sleeve (1) axial direction, or be provided with that at least one is parallel or through the plane of nut sleeve (1) axis with at least one is to raised first convex stupefied of nut sleeve (1) axial direction simultaneously; The first described bottom portion of groove is provided with the first through hole;
The cylindrical shape that described fastener (2) is hollow, fastener (2) middle part is provided with the second circular through hole, described fastener (2) outer side wall is provided with that at least one is parallel or through the plane of fastener (2) axis, or it is convex stupefied away from second of fastener (2) axial direction projection to be provided with at least one, or to be provided with at least one parallel or through fastener (2) axis plane convex stupefied away from second of fastener (2) axial direction projection with at least one simultaneously;
The most weakness of described nut sleeve (1) madial wall radial distance, apart from the distance of nut sleeve (1) axis, is slightly smaller than the distance of described fastener (2) outer side wall radial distance biggest place apart from fastener (2) axis;
The sidewall of the first described through hole is the collar flange that axial direction projection is yearned in footpath, described fastener (2) bottom is fixedly installed on this collar flange, is provided with continuous print screw thread or arranges the size interval with screw thread phase uniform pitch inside the madial wall of described fastener (2) second through hole and collar flange;
Described anti-theft nut is not when using, and described fastener (2) is fixedly installed in the through hole of described nut sleeve (1); When described anti-theft nut is installed and used, described nut sleeve (1) rotates around fastener (2), the position of described nut sleeve (1) madial wall projection and the position of described fastener (2) outer side wall projection abut against, and extruding produces certain moment of torsion, the described fastener (2) described in nut sleeve (1) extruding, make the screw thread extruding screw in described fastener (2) second through hole and produce certain distortion, described nut sleeve (1) produces the rotation of circumferencial direction relative to fastener (2).
2. anti-theft nut according to claim 1, is characterized in that: described first convex stupefied and the second convex stupefied cross section is for semicircle.
3. anti-theft nut according to claim 1, is characterized in that: the top of described fastener (2) is provided with at least two equally distributed wedge-shaped impressions.
4. the anti-theft nut according to claim 1,2 or 3, it is characterized in that: spaced 120 ° of described nut sleeve (1) first groove madial wall is provided with 3 planes paralleled to the axis, to be provided with 3 sliver transvers sections be semicircular convex stupefied to spaced 120 ° of described fastener (2) outer side wall.
5. the anti-theft nut according to claim 1,2 or 3, it is characterized in that: described nut sleeve (1) does not overlap with the axis of fastener (2) but parallel, described nut sleeve (1) madial wall is connected by 2 facets by the arc surface that the arc surface that diameter is larger is less with diameter and forms, its larger arc surface be provided with one convex stupefied; Described fastener (2) outer side wall is connected by 2 facets by the arc surface that the arc surface that diameter is larger is less with diameter and forms, its less arc surface be provided with one convex stupefied; The arc surface that described nut sleeve (1) madial wall is less and the larger arc surface end of described fastener (2) abut against, convex stupefied with the described fastener (2) of described nut sleeve (1) madial wall comparatively great circle cambered surface abuts against, and convex stupefied with described nut sleeve (1) madial wall of described fastener (2) outer side wall abuts against.
6. the anti-theft nut according to claim 1,2 or 3, it is characterized in that: to be provided with 3 sliver transvers sections be that to be provided with 3 sliver transvers sections be semicircular convex stupefied to spaced 120 ° of semicircular convex stupefied, described fastener (2) outer side wall to spaced 120 ° of described nut sleeve (1) first groove madial wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420585565.6U CN204239430U (en) | 2014-10-11 | 2014-10-11 | A kind of anti-theft nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420585565.6U CN204239430U (en) | 2014-10-11 | 2014-10-11 | A kind of anti-theft nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204239430U true CN204239430U (en) | 2015-04-01 |
Family
ID=52768930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420585565.6U Withdrawn - After Issue CN204239430U (en) | 2014-10-11 | 2014-10-11 | A kind of anti-theft nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204239430U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314961A (en) * | 2014-10-11 | 2015-01-28 | 俞宜洪 | Burglarproof nut and manufacturing method thereof |
-
2014
- 2014-10-11 CN CN201420585565.6U patent/CN204239430U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314961A (en) * | 2014-10-11 | 2015-01-28 | 俞宜洪 | Burglarproof nut and manufacturing method thereof |
| CN104314961B (en) * | 2014-10-11 | 2016-09-28 | 俞宜洪 | A kind of anti-theft nut and manufacture method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150401 Effective date of abandoning: 20160928 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |