CN220668037U - Double-nut locking device and connecting mechanism - Google Patents
Double-nut locking device and connecting mechanism Download PDFInfo
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- CN220668037U CN220668037U CN202322356010.6U CN202322356010U CN220668037U CN 220668037 U CN220668037 U CN 220668037U CN 202322356010 U CN202322356010 U CN 202322356010U CN 220668037 U CN220668037 U CN 220668037U
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- 239000002131 composite material Substances 0.000 description 2
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- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses a double-nut locking device and a connecting mechanism, comprising a fastening bolt, a fastening nut and a locknut; the radial circumferential surface of the screw rod of the fastening bolt is provided with a fastening external thread, the axial surface of the screw rod of the fastening bolt is provided with a groove, and the groove is internally provided with an anti-loosening internal thread; the fastening nut is provided with a fastening internal thread matched with the fastening external thread, and the fastening external thread and the fastening internal thread are mutually meshed to form a fastening thread pair; an annular groove is formed in one axial surface of the locknut, an anti-loosening external thread matched with the anti-loosening internal thread is formed in a central cylinder in the annular groove, the anti-loosening internal thread and the anti-loosening external thread are meshed with each other to form an anti-loosening thread pair, and a mounting hole is formed in the other axial surface of the locknut. The fastening thread pair and the anti-loosening thread pair are opposite in screwing direction, and mutual limiting is achieved through two pairs of threads opposite in screwing direction, so that the loosening problem of nuts is avoided.
Description
Technical Field
The utility model relates to the technical field of fastening, in particular to a double-nut locking device.
Background
Screw thread connection is a common mechanical connection mode and is widely applied to various mechanical equipment. However, in the use process, the threaded connection is easily loosened due to the influence of factors such as vibration, temperature difference, alternating load and the like, so that accidents occur. The existing anti-loosening mode uses double nuts to replace single nuts for connection, but the anti-loosening mode can not effectively prevent loosening under alternating load and vibration working conditions, and the phenomenon of loosening of the nuts still occurs.
The traditional down bolt, a composite thread (bulletin number: CN 1281954A) of Chinese patent adopts a composite structure of positive and negative threads, and the pretightening force can be effectively reserved by means of mutual restriction of left-handed threads and right-handed threads, but the manufacturing process is difficult and the cost is high, in addition, the strength of the threads is reduced, and the screw cannot be widely used.
Disclosure of Invention
The utility model aims to solve the problems and provide the double-nut locking device, wherein the external screw thread is fastened by the fastening bolt and the internal screw thread is fastened by the fastening nut to form the fastening screw pair, the anti-loosening screw pair is formed by the anti-loosening internal screw of the fastening bolt and the anti-loosening external screw of the anti-loosening nut, the screw directions of the fastening screw pair and the anti-loosening screw pair are opposite, and the mutual limit is realized by two pairs of opposite screw threads, so that the loosening of the nut can be effectively prevented.
The utility model is realized according to the following technical scheme:
in a first aspect, the present utility model discloses a double nut locking device comprising:
the radial peripheral surface of the screw rod of the fastening bolt is provided with a fastening external thread, the axial surface of the screw rod is provided with a groove, and the groove is internally provided with an anti-loosening internal thread;
the fastening nut is provided with a fastening internal thread matched with the fastening external thread, and the fastening external thread and the fastening internal thread are mutually meshed to form a fastening thread pair;
an annular groove is arranged on one axial surface of the locknut, an anti-loosening external thread matched with the anti-loosening internal thread is arranged on a central cylinder in the annular groove, the anti-loosening internal thread and the anti-loosening external thread are meshed with each other to form an anti-loosening thread pair, and a mounting hole is arranged on the other axial surface of the locknut.
In some embodiments, the tightening thread pair is counter-handed to the anti-loosening thread pair.
In some embodiments, further comprising:
the gasket is provided with a connecting hole and is sleeved on the fastening bolt screw rod, and the gasket is tightly pressed on the connecting plate through the fastening nut.
In some embodiments, the central axes of the fastening external thread, the locking internal thread, the connecting hole, the fastening internal thread, the locking external thread, the mounting hole and the annular groove coincide.
In some embodiments, the diameter of the connecting hole and the diameter of the outer wall of the annular groove of the gasket are 1mm-2mm larger than the diameter of the thread of the fastening bolt.
In some embodiments, the mounting hole on the locknut is a hexagon socket mounting hole.
In some embodiments, after the fastening, the outer edge of the locknut is pressed on the upper surface of the fastening nut, and a preset gap is formed between the fastening bolt and the bottom of the locknut annular groove.
In a second aspect, the present utility model discloses a connection mechanism comprising:
the double nut locking device;
the first connecting plate and the second connecting plate are fixed together through the double-nut locking device.
In some embodiments, the first connecting plate and the second connecting plate are respectively provided with a connecting hole, and the fastening bolts are sequentially connected with the first connecting plate, the second connecting plate, the fastening nuts and the locknuts.
In some embodiments, the diameter of the outer wall of the connecting hole of the first connecting plate and the second connecting plate is 1mm-2mm larger than the diameter of the thread of the fastening bolt.
The utility model has the beneficial effects that:
the external screw thread is fastened through the fastening bolt and the internal screw thread is fastened through the fastening nut to form a fastening screw thread pair, the anti-loosening screw thread pair is formed by the fastening bolt anti-loosening internal screw thread and the anti-loosening screw thread of the anti-loosening nut, the fastening screw thread pair is opposite to the anti-loosening screw thread pair in screwing direction, mutual limiting is realized through two pairs of opposite-direction screw threads, and loosening of the nut can be effectively prevented. Meanwhile, compared with the Down's thread, the down's thread has wide applicability, and the manufacturing difficulty and the manufacturing cost are reduced under the condition that the strength of the thread pair is not reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort.
In the drawings:
FIG. 1 is a schematic view of an application split of a double nut locking device of the present utility model;
fig. 2 is an installation cross-section of the double nut locking device of the present utility model.
Reference numerals illustrate: the fastening bolt 1, the fastening external thread 11, the anti-loosening internal thread 12, the first connecting plate 2, the connecting hole 21, the second connecting plate 3, the connecting hole 31, the gasket 4, the connecting hole 41, the fastening nut 5, the fastening internal thread 51, the anti-loosening nut 6, the anti-loosening external thread 61, the mounting hole 62 and the annular groove 63.
It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.
Description of the embodiments
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1 and 2, a double-nut locking device comprises a fastening bolt 1, a washer 4, a fastening nut 5 and a locknut 6. The radial circumferential surface of the screw rod of the fastening bolt 1 is provided with a fastening external thread 11, the axial surface of the screw rod of the fastening bolt 1 is provided with a groove, and the groove is internally provided with a locking internal thread 12; the fastening nut 5 is provided with a fastening internal thread 51 matched with the fastening external thread 11, and the fastening external thread 11 and the fastening internal thread 51 are mutually meshed to form a fastening thread pair; an annular groove 63 is arranged on one axial surface of the locknut 6, a locking external thread 61 matched with the locking internal thread 12 is arranged on a central cylinder in the annular groove 63, the locking internal thread 12 and the locking external thread 61 are meshed with each other to form a locking thread pair, and a mounting hole 62 is arranged on the other axial surface of the locknut 6; the gasket 4 is provided with a connecting hole for being sleeved on the fastening bolt screw rod, and the gasket 4 is tightly pressed on the connecting plate through the fastening nut 5.
The further scheme is as follows: the fastening thread pair and the anti-loosening thread pair are opposite in screwing direction, and mutual limiting is achieved through two pairs of threads opposite in screwing direction, so that the loosening problem of nuts is avoided.
The further scheme is as follows: the central axes of the fastening external thread 11, the locking internal thread 12, the connecting hole 41, the fastening internal thread 51, the locking external thread 61, the mounting hole 62 and the annular groove 63 are coincident.
The further scheme is as follows: the diameters of the connecting hole 41 of the washer 4 and the outer wall of the annular groove 63 are both larger than the thread diameter of the fastening bolt 1 by 1mm-2mm.
The further scheme is as follows: the mounting hole 62 on the locknut 6 is a hexagon socket mounting hole.
The further scheme is as follows: after fastening, the outer edge of the locknut 6 is pressed on the upper surface of the fastening nut 5, and the fastening bolt 1 has a preset gap from the bottom 63 of the annular groove.
With continued reference to fig. 1 and 2, the utility model also discloses a connecting mechanism, which comprises the double-nut locking device, a first connecting plate 2 and a second connecting plate 3; the first connecting plate 2 and the second connecting plate 3 are fixed together through a double-nut locking device.
The further scheme is as follows: the first connecting plate 2 is provided with a connecting hole 21, the second connecting plate 3 is provided with a connecting hole 31, and the fastening bolt 1 is sequentially connected with the first connecting plate 2, the second connecting plate 3, the gasket 4, the fastening nut 5 and the locknut 6.
The further scheme is as follows: the diameters of the outer walls of the connecting holes 21 of the first connecting plate 2 and the connecting holes 31 of the second connecting plate 3 are larger than the thread diameter of the fastening bolt 1 by 1mm-2mm.
In summary, the utility model discloses a double-nut locking device, which comprises a fastening bolt, a gasket, a fastening nut and a locknut. The fastening screw bolt fastening external thread and the fastening nut fastening internal thread form a fastening screw pair, the fastening screw bolt anti-loosening internal thread and the anti-loosening screw nut anti-loosening external thread form an anti-loosening screw pair, the fastening screw pair and the anti-loosening screw pair are opposite in screwing direction, mutual limiting is achieved through two pairs of opposite-screwing-direction threads, and therefore the loosening problem of nuts is avoided.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features contained in other embodiments, but not others, combinations of features of different embodiments are equally meant to be within the scope of the utility model and form different embodiments. For example, in the above embodiments, those skilled in the art can use the above embodiments in combination according to known technical solutions and technical problems to be solved by the present application.
The foregoing description is only illustrative of the preferred embodiments of the present utility model, and is not intended to limit the utility model to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the appended claims.
Claims (10)
1. A double nut locking device, comprising:
the radial peripheral surface of the screw rod of the fastening bolt is provided with a fastening external thread, the axial surface of the screw rod is provided with a groove, and the groove is internally provided with an anti-loosening internal thread;
the fastening nut is provided with a fastening internal thread matched with the fastening external thread, and the fastening external thread and the fastening internal thread are mutually meshed to form a fastening thread pair;
an annular groove is arranged on one axial surface of the locknut, an anti-loosening external thread matched with the anti-loosening internal thread is arranged on a central cylinder in the annular groove, the anti-loosening internal thread and the anti-loosening external thread are meshed with each other to form an anti-loosening thread pair, and a mounting hole is arranged on the other axial surface of the locknut.
2. A double nut locking device as defined in claim 1 wherein:
the fastening thread pair and the anti-loosening thread pair are opposite in rotation direction.
3. The double nut locking device as recited in claim 1, further comprising:
the gasket is provided with a connecting hole and is sleeved on the fastening bolt screw rod, and the gasket is tightly pressed on the connecting plate through the fastening nut.
4. A double nut locking device as claimed in claim 3 wherein:
the central axes of the fastening external thread, the anti-loose internal thread, the connecting hole, the fastening internal thread, the anti-loose external thread, the mounting hole and the annular groove are coincident.
5. A double nut locking device as claimed in claim 3 wherein:
the diameters of the connecting hole of the gasket and the outer wall of the annular groove are both larger than the thread diameter of the fastening bolt by 1mm-2mm.
6. A double nut locking device as defined in claim 1 wherein:
the mounting hole on the locknut is an inner hexagonal mounting hole.
7. A double nut locking device as defined in claim 1 wherein:
after fastening, the outer edge of the locknut is pressed on the upper surface of the fastening nut, and a preset gap is reserved between the fastening bolt and the bottom of the locknut annular groove.
8. A connection mechanism, comprising:
the double nut lock device as claimed in any one of claims 1 to 7;
the first connecting plate and the second connecting plate are fixed together through the double-nut locking device.
9. A connection mechanism according to claim 8, wherein:
the first connecting plate and the second connecting plate are respectively provided with a connecting hole, and the fastening bolts are sequentially connected with the first connecting plate, the second connecting plate, the fastening nuts and the locknuts.
10. A connection mechanism according to claim 9, wherein:
the diameters of the outer walls of the connecting holes of the first connecting plate and the second connecting plate are both larger than the diameter of the screw thread of the fastening bolt by 1mm-2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322356010.6U CN220668037U (en) | 2023-08-31 | 2023-08-31 | Double-nut locking device and connecting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322356010.6U CN220668037U (en) | 2023-08-31 | 2023-08-31 | Double-nut locking device and connecting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220668037U true CN220668037U (en) | 2024-03-26 |
Family
ID=90335242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322356010.6U Active CN220668037U (en) | 2023-08-31 | 2023-08-31 | Double-nut locking device and connecting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220668037U (en) |
-
2023
- 2023-08-31 CN CN202322356010.6U patent/CN220668037U/en active Active
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