CN214404291U - Anti-theft type non-detachable screw - Google Patents
Anti-theft type non-detachable screw Download PDFInfo
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- CN214404291U CN214404291U CN202120580774.1U CN202120580774U CN214404291U CN 214404291 U CN214404291 U CN 214404291U CN 202120580774 U CN202120580774 U CN 202120580774U CN 214404291 U CN214404291 U CN 214404291U
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- ratchet
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- nut
- screw rod
- smooth surface
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Abstract
The utility model discloses an anti-theft type non-detachable screw, which relates to the field of screw design, and comprises a screw rod and a screw cap, wherein a smooth surface is formed on the outer side of the upper end of the screw rod, an external thread is formed on the outer side of the lower end of the screw rod, a limit nut is arranged on the outer side of the smooth surface in a sliding fit manner, a first ratchet is formed on the upper side surface of the limit nut, the screw cap is formed on the upper end of the screw rod, a second ratchet is formed on the lower side surface of the screw cap, the direction of the second ratchet is the same as that of the first ratchet, a spring washer is arranged below the limit nut, and the spring washer is arranged on the outer side of the smooth surface in a sliding fit manner; the beneficial effects are that: during the installation, through the nut with screw rod screw in screw hole, spring washer drives stop nut gland nut for first ratchet and second ratchet sticiss each other, and after the screw rod screw in screw hole completely, because stop nut card is unable rotatory in the countersunk head inslot, first ratchet just can block the second ratchet, does not let nut reverse rotation, thereby lets novel screw undetachable, has improved the theftproof ability.
Description
Technical Field
The utility model belongs to the technical field of the screw design and specifically relates to a non-detachable screw of theftproof type is related to.
Background
The Screw is a Screw (foreign name: Screw), which is a tool for fastening the parts of an object step by utilizing the physics and mathematical principle of the inclined circular rotation and friction of the object.
The screw used in the production and the life at present is characterized in that: the screw can be screwed in and out easily and can be reused, and the screw cannot be used for permanent security facilities and permanent facilities needing theft prevention. If the anti-theft nail cover needs to be used, a sealing object must be added on the nail cover or a knife edge must be ground, so that the labor and the materials are wasted, the investment is increased, the benefit is reduced, the anti-theft effect is still poor, and the nail cover can be screwed out in a mode of clamping the nail cover through a steel wire clamp.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an it is not enough to overcome above-mentioned condition, provides a technical scheme that can solve above-mentioned problem.
The utility model provides an anti-theft type non-detachable screw, including screw rod and nut, the outside shaping of screw rod upper end has the smooth surface, the outside shaping of screw rod lower extreme has the external screw thread, stop nut is installed to the outside sliding fit of smooth surface, stop nut's upside surface shaping has first ratchet, the nut shaping is in the upper end of screw rod, the downside surface shaping of nut has the second ratchet, the second ratchet is the same with the direction of first ratchet, stop nut's below is provided with spring washer, the outside at the smooth surface is installed to spring washer sliding fit.
As a further aspect of the present invention: the upper side surface of the screw cap is formed with a third ratchet, and the direction of the third ratchet is opposite to that of the first ratchet.
As a further aspect of the present invention: the third ratchet is provided with two arranged in a circular array.
As a further aspect of the present invention: the middle part shaping of stop nut has the through-hole, and the outside at the smooth surface is installed to through-hole sliding fit.
As a further aspect of the present invention: the limiting nut is an outer hexagon nut.
As a further aspect of the present invention: the upper end of the limiting nut is formed with a positioning disc, the diameter of the positioning disc is the same as that of the screw cap, and the first ratchet is formed on the upper side surface of the positioning disc.
As a further aspect of the present invention: the first ratchet is provided with more than two arranged in a circular array, and the number of the second ratchet is the same as that of the first ratchet.
As a further aspect of the present invention: the lower end edge of the screw rod is formed with a chamfer angle.
Compared with the prior art, the beneficial effects of the utility model are that: during the installation, in with the external screw thread screw in to the screw thread hole of screw rod lower extreme through the nut, stop nut clearance fit is at the countersunk head inslot, the countersunk head groove can restrict stop nut and rotate, spring washer drives stop nut gland nut, make first ratchet and second ratchet sticis each other, after the screw rod screw in screw hole completely, because stop nut card is unable rotatory at the countersunk head inslot, the first ratchet of stop nut just can block the second ratchet, do not let the nut reverse rotation, thereby realize novel screw non-detachable effect, the theftproof ability has been improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the countersunk head groove and the screw hole of the present invention.
Shown in the figure: 1. a screw; 2. a nut; 3. a smooth surface; 4. an external thread; 5. a limit nut; 6. a first ratchet; 7. a second ratchet; 8. a spring washer; 9. a third ratchet; 10. a through hole; 11. positioning the disc; 12. chamfering; 13. a countersunk groove; 14. and (4) screw holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, an anti-theft type non-detachable screw comprises a screw rod 1 and a screw cap 2, wherein a smooth surface 3 is formed on the outer side of the upper end of the screw rod 1, an external thread 4 is formed on the outer side of the lower end of the screw rod 1, a limit nut 5 is installed on the outer side of the smooth surface 3 in a sliding fit manner, a first ratchet 6 is formed on the upper side surface of the limit nut 5, the screw cap 2 is formed on the upper end of the screw rod 1, a second ratchet 7 is formed on the lower side surface of the screw cap 2, the direction of the second ratchet 7 is the same as that of the first ratchet 6, a spring washer 8 is arranged below the limit nut 5, and the spring washer 8 is installed on the outer side of the smooth surface 3 in a sliding fit manner;
the principle is as follows: during the installation, in the screw hole 14 is screwed in with external screw thread 4 of 1 lower extreme of screw rod through nut 2, 5 clearance fit of stop nut is in countersunk groove 13, countersunk groove 13 can restrict 5 rotations of stop nut, spring washer 8 drives 5 gland nut 2 of stop nut, make first ratchet 6 and second ratchet 7 sticis each other, 1 complete screw in screw hole 14 backs of screw rod, because 5 cards of stop nut are unable rotatory in countersunk groove 13, 5 first ratchets of stop nut 6 just can block second ratchet 7, do not let nut 2 reverse rotation, thereby realize novel screw non-detachable effect, the theftproof ability has been improved.
As a further aspect of the present invention: the upper side surface of the screw cap 2 is formed with a third ratchet 9, and the direction of the third ratchet 9 is opposite to that of the first ratchet 6; so that the nut 2 can not rotate anticlockwise and the novel screw can not be detached.
As a further aspect of the present invention: the third ratchet 9 is provided with two arranged in a circular array; nut 2 can drive through the mode of a word screwdriver card between two third ratchet 9, and a word screwdriver blocks two third ratchet 9 and drives nut clockwise turning locking, and the setting of third ratchet 9 lets a word screwdriver can't drive nut 2 anticlockwise turning for novel screw can not be dismantled.
As a further aspect of the present invention: a through hole 10 is formed in the middle of the limiting nut 5, and the through hole 10 is installed on the outer side of the smooth surface 3 in a sliding fit mode; the through hole 10 can be arranged to cancel the thread in the stop nut 5, so that the stop nut 5 can be arranged on the outer side of the smooth surface 3 in a more stable sliding fit manner.
As a further aspect of the present invention: the limiting nut 5 is an outer hexagon nut.
As a further aspect of the present invention: a positioning disc 11 is formed at the upper end of the limiting nut 5, the diameter of the positioning disc 11 is the same as that of the nut 2, and the first ratchet 6 is formed on the upper side surface of the positioning disc 11; make first ratchet 6 more stable, when needing to dismantle novel screw, push down whole stop nut 5 for spring washer 8 is in the compression state, and first ratchet 6 breaks away from second ratchet 7, thereby makes nut 2 can the anticlockwise rotation dismantlement, but pushes down whole stop nut 5 and need use special instrument, and the theftproof effect improves.
As a further aspect of the present invention: the first ratchets 6 are provided with more than two arranged in a circular array, and the number of the second ratchets 7 is the same as that of the first ratchets 6; so that the first ratchet 6 can more stably catch the second ratchet 7.
As a further aspect of the present invention: a chamfer angle 12 is formed at the lower end edge of the screw rod 1; the external thread 4 of the screw rod 1 can enter the threaded hole 14 more easily, and the use is more convenient.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The utility model provides a non-detachable screw of theftproof type, includes screw rod and nut, its characterized in that: the outside shaping of screw rod upper end has smooth surface, and the outside shaping of screw rod lower extreme has the external screw thread, and stop nut is installed to the outside sliding fit of smooth surface, and stop nut's upside surface shaping has first ratchet, and the nut shaping is in the upper end of screw rod, and the downside surface shaping of nut has the second ratchet, and the second ratchet is the same with the direction of first ratchet, and stop nut's below is provided with spring washer, and spring washer sliding fit installs the outside at the smooth surface.
2. An anti-theft non-removable screw, according to claim 1, characterized in that: the upper side surface of the screw cap is formed with a third ratchet, and the direction of the third ratchet is opposite to that of the first ratchet.
3. An anti-theft non-removable screw, according to claim 2, characterized in that: the third ratchet is provided with two arranged in a circular array.
4. An anti-theft non-removable screw, according to claim 1, characterized in that: the middle part shaping of stop nut has the through-hole, and the outside at the smooth surface is installed to through-hole sliding fit.
5. An anti-theft non-removable screw, according to any one of claims 1 or 4, characterized in that: the limiting nut is an outer hexagon nut.
6. An anti-theft non-removable screw, according to claim 1, characterized in that: the upper end of the limiting nut is formed with a positioning disc, the diameter of the positioning disc is the same as that of the screw cap, and the first ratchet is formed on the upper side surface of the positioning disc.
7. An anti-theft non-removable screw, according to claim 1, characterized in that: the first ratchet is provided with more than two arranged in a circular array, and the number of the second ratchet is the same as that of the first ratchet.
8. An anti-theft non-removable screw, according to claim 1, characterized in that: the lower end edge of the screw rod is formed with a chamfer angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120580774.1U CN214404291U (en) | 2021-03-22 | 2021-03-22 | Anti-theft type non-detachable screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120580774.1U CN214404291U (en) | 2021-03-22 | 2021-03-22 | Anti-theft type non-detachable screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214404291U true CN214404291U (en) | 2021-10-15 |
Family
ID=78029595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120580774.1U Active CN214404291U (en) | 2021-03-22 | 2021-03-22 | Anti-theft type non-detachable screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214404291U (en) |
-
2021
- 2021-03-22 CN CN202120580774.1U patent/CN214404291U/en active Active
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