CN220956376U - Locking fastener - Google Patents
Locking fastener Download PDFInfo
- Publication number
- CN220956376U CN220956376U CN202322759030.8U CN202322759030U CN220956376U CN 220956376 U CN220956376 U CN 220956376U CN 202322759030 U CN202322759030 U CN 202322759030U CN 220956376 U CN220956376 U CN 220956376U
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- Prior art keywords
- nut
- bolt
- mounting groove
- loosening
- fastening device
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- 239000007769 metal material Substances 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract description 8
- 238000007906 compression Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Abstract
The utility model discloses an anti-loosening fastening device which comprises a screw rod, a nut and a bolt, wherein the screw rod is in threaded connection with the nut, a mounting groove is formed in the surface of the nut, the bolt is in clearance fit with the mounting groove in the surface of the nut, a tight supporting part capable of being tightly supported by the inner wall of the mounting groove is arranged on the bolt, one end of the bolt is provided with a fixing part extending to the outer side of the nut, and the fixing part is clamped in a gap between the nut and a compacting object so that the tight supporting part is tightly supported by the inner wall of the mounting groove, and therefore the bolt can generate a pretightening force on the nut. When the anti-loosening fastening device is in contact with a compression object through the rotation of the nut, the fixing part of the bolt is pressed into a gap between the nut and the compression object by utilizing the rotation force, the bolt moves upwards in the mounting groove, and the abutting part abuts against the inner wall of the mounting groove, so that the bolt generates a pretightening force on the nut, and the nut is prevented from loosening in use. The utility model has simple structure, convenient operation and strong practicability.
Description
Technical Field
The utility model belongs to the technical field of mechanical fasteners, and particularly relates to an anti-loosening fastening device.
Background
The nut is a fixing piece, and is usually matched with a screw or a bolt for use, the nut is in threaded connection with the screw, and the nut is pressed on a compacting object after being screwed up, so that the fixing effect on the compacting object is realized. However, after the nut is tightened, the problem that the nut is loosened easily occurs when the compression object or the screw is subjected to external force, particularly vibration external force for a long time, during long-term use, resulting in weak fixing effect of the compression object.
The prior nut is generally in a loose-proof mode, a gasket is generally adopted, a pretightening force is generated between the nut and a compacting object, so that the nut is not easy to fall off, the pretightening force is lost due to the fact that elasticity of the gasket is damaged, and finally the nut still loosens, and particularly in a severe vibration environment, certain potential safety hazards exist.
Disclosure of utility model
The utility model aims to provide a locking fastening device which is used for solving the problems in the prior art.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a locking fastener, includes screw rod, nut and bolt, screw rod and nut threaded connection, the mounting groove has been seted up on the nut surface, bolt and the mounting groove clearance fit on nut surface are equipped with on the bolt can support tight portion with the mounting groove inner wall, and the one end of bolt is equipped with the fixed part that extends to the nut outside, fixed part centre gripping is in the gap between nut and the compact heap to make to support tight portion and mounting groove inner wall to support tightly, thereby make the bolt produce a pretightning force to the nut.
As an optional implementation manner of the foregoing technical solution, the abutting portion includes a first abutting convex strip, and the first abutting convex strip is disposed on one side of the latch and is in clearance fit with the mounting groove.
As an optional implementation manner of the foregoing technical solution, the abutting portion further includes a second abutting convex strip, where the first abutting convex strip and the second abutting convex strip are disposed on two sides of the latch, and the second abutting convex strip is in clearance fit with the mounting groove.
As an optional implementation manner of the technical scheme, locking teeth are arranged on the surface of the bolt, a through hole communicated with the mounting groove is formed in the nut, and the locking teeth can extend into the through hole to be meshed with external threads of the screw rod.
As an optional implementation manner of the above technical scheme, the fixing portion includes a fixing strip, the fixing strip is disposed at one end of the bolt and is bent towards the screw rod, one end of the mounting groove is provided with a positioning opening portion, a part of the fixing strip is embedded into the positioning opening portion, and another part of the fixing strip is exposed outside the nut.
As an alternative embodiment of the above technical solution, the mounting groove is obliquely arranged on the surface of the nut.
As an optional implementation manner of the technical scheme, at least two mounting grooves are uniformly formed in the surface of the nut along the circumferential direction, and a bolt is arranged in each mounting groove.
As an alternative embodiment of the above technical solution, the plug pin is made of plastic or metal material.
The beneficial effects of the utility model are as follows:
When the anti-loosening fastening device is in contact with a compression object through the rotation of the nut, the fixing part of the bolt is pressed into a gap between the nut and the compression object by utilizing the rotation force, the bolt moves upwards in the mounting groove, and the abutting part abuts against the inner wall of the mounting groove, so that the bolt generates a pretightening force on the nut, and the nut is prevented from loosening in use. The utility model has simple structure, convenient operation and strong practicability.
Drawings
FIG. 1 is a schematic view of a structure of a loosening prevention fastening device in one embodiment of the present utility model;
fig. 2 is a schematic view of the structure of the locking tooth in one embodiment of the present utility model.
In the figure: 1-a screw; 2-a nut; 3-a bolt; 4-mounting grooves; 5-compacting; 6-a first tightening convex strip; 7-second tightening convex strips; 8-locking teeth; 9-fixing strips.
Detailed Description
Examples
As shown in fig. 1 and 2, the embodiment provides a locking fastening device, which comprises a screw 1, a nut 2 and a bolt 3, wherein external threads are arranged on the surface of the screw 1, the screw 1 can be replaced by bolts, internal threads are arranged on the inner wall of the nut 2, and the screw 1 is in threaded connection with the nut 2. The compression object 5 is provided with a mounting hole matched with the screw rod 1, the mounting hole can be designed into a threaded hole or a unthreaded hole, and the screw rod 1 penetrates through the compression object 5 and is locked through the nut 2.
As shown in fig. 1, the surface of the nut 2 is provided with a mounting groove 4, and the bolt 3 is in clearance fit with the mounting groove 4 on the surface of the nut 2, i.e. the bolt 3 can move up and down in a small range in the mounting groove 4. The bolt 3 is provided with a tight supporting part which can be abutted against the inner wall of the mounting groove 4, one end of the bolt 3 is provided with a fixing part which extends to the outer side of the nut 2, and the fixing part is clamped in a gap between the nut 2 and the compacting object 5, so that the tight supporting part is abutted against the inner wall of the mounting groove 4, and the bolt 3 generates a pretightening force on the nut 2.
When the anti-loosening fastening device is in contact with the compacting object 5 through the rotation of the nut 2, the fixing part of the bolt 3 is pressed into a gap between the nut 2 and the compacting object 5 by utilizing the rotation force, the bolt 3 moves upwards in the mounting groove 4, and the abutting part abuts against the inner wall of the mounting groove 4, so that the bolt 3 generates a pretightening force on the nut 2, and the nut 2 is prevented from loosening in use. The utility model has simple structure, convenient operation and strong practicability.
In this embodiment, the abutting portion includes a first abutting convex strip 6, and the first abutting convex strip 6 is disposed on one side of the latch 3 and is in clearance fit with the mounting groove 4. Preferably, the abutting part further comprises a second abutting convex strip 7, the first abutting convex strip 6 and the second abutting convex strip 7 are oppositely arranged on two sides of the action of the bolt 3, and the second abutting convex strip 7 is in clearance fit with the mounting groove 4. When the bolt 3 moves upwards in the mounting groove 4, the first abutting convex strip 6 and the second abutting convex strip 7 are abutted tightly with the inner wall of the mounting groove 4, so that the stress stability of the nut 2 is improved.
As shown in fig. 2, in order to increase the anti-loosening effect, the surface of the bolt 3 is provided with anti-loosening teeth 8, the nut 2 is provided with a through hole communicated with the mounting groove 4, and the anti-loosening teeth 8 can extend into the through hole to be meshed with the external thread of the screw 1. The bolt 3 can rotate along with the nut 2 in the mounting groove 4, and the clamp 5 supports tightly the bolt 3 after, and the locking tooth 8 of bolt 3 and the external screw thread of screw rod 1 interlock each other, have increased the frictional force of bolt 3 and screw rod 1, have effectively improved the locking effect between nut 2 and the screw rod 1 adopting this mode.
In this embodiment, the fixing portion includes a fixing strip 9, the fixing strip 9 is disposed at one end of the bolt 3 and is bent towards the screw 1, one end of the mounting groove 4 is provided with a positioning opening, a part of the fixing strip 9 is embedded into the positioning opening, and another part of the fixing strip 9 is exposed outside the nut 2. The fixing strip 9 is clamped in the gap between the nut 2 and the compacting object 5, and the positioning opening part is favorable for positioning the fixing strip 9.
Wherein, mounting groove 4 slope sets up on nut 2 surface, nut 2 surface evenly is equipped with two at least mounting grooves 4 along the circumferencial direction, all is equipped with bolt 3 in every mounting groove 4, can greatly increased screw rod 1 and nut 2's locking performance.
It should be noted that, the bolt 3 is made of plastic or metal, etc., and can be made into a plastic bolt 3, a metal bolt 3 or bolts made of other materials, and the bolt can be selected for use according to different occasions, so as to meet different use requirements.
When the anti-loosening fastening device is in contact with the compacting object 5 through the rotation of the nut 2, the fixing part of the bolt 3 is pressed into a gap between the nut 2 and the compacting object 5 by utilizing the rotation force, the bolt 3 moves upwards in the mounting groove 4, and the abutting part abuts against the inner wall of the mounting groove 4, so that the bolt 3 generates a pretightening force on the nut 2, and the nut 2 is prevented from loosening in use; in addition, the locking tooth 8 of the bolt 3 is meshed with the external thread of the screw 1, so that the friction force between the bolt 3 and the screw 1 is increased, and the locking effect between the nut 2 and the screw 1 is effectively improved.
Compared with the prior art, the utility model has the advantages that the technical scheme is adopted: the nut 2 can bear larger torsion and have longer lasting anti-loosening effect, can be fast assembled and cached, can more effectively meet daily use requirements (such as automobiles, machine tools, building structures and the like) of people, and can also increase the number of bolts 3 according to customer requirements to enable the nut 2 to have higher anti-loosening effect and meet higher-requirement customer groups (such as high-speed rail, aerospace science and technology, military equipment and the like).
In the description of the present utility model, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be fixedly connected, detachably connected, or integrally formed; may be a mechanical or electrical connection; may be directly connected or indirectly connected through an intermediate medium, and may be in communication with the inside of two elements or in interaction with the two elements, the specific meaning of the terms being understood by those skilled in the art. Furthermore, the particular features, structures, etc. described in the examples are included in at least one embodiment and those of skill in the art may combine features of different embodiments without contradiction. The scope of the present utility model is not limited to the above-described specific embodiments, and embodiments which can be suggested to those skilled in the art without inventive effort according to the basic technical concept of the present utility model are all within the scope of the present utility model.
Claims (8)
1. The utility model provides a locking fastener, its characterized in that, includes screw rod (1), nut (2) and bolt (3), screw rod (1) and nut (2) threaded connection, mounting groove (4) have been seted up on nut (2) surface, bolt (3) and mounting groove (4) clearance fit on nut (2) surface are equipped with on bolt (3) can with mounting groove (4) inner wall tight portion of support, and the one end of bolt (3) is equipped with the fixed part that extends to the nut (2) outside, fixed part centre gripping is in the gap between nut (2) and compact (5) to make support tight portion and mounting groove (4) inner wall tight, thereby make bolt (3) produce a pretightning force to nut (2).
2. The anti-loosening fastening device of claim 1, wherein the tightening portion comprises a first tightening tab (6), the first tightening tab (6) being disposed on one side of the plug pin (3) and being in clearance fit with the mounting slot (4).
3. The anti-loosening fastening device according to claim 2, wherein the abutting portion further comprises a second abutting convex strip (7), the first abutting convex strip (6) and the second abutting convex strip (7) are oppositely arranged on two sides of the bolt (3), and the second abutting convex strip (7) is in clearance fit with the mounting groove (4).
4. The anti-loosening fastening device according to claim 1, wherein anti-loosening teeth (8) are arranged on the surface of the bolt (3), a through hole communicated with the mounting groove (4) is formed in the nut (2), and the anti-loosening teeth (8) can extend into the through hole to be meshed with external threads of the screw (1).
5. The loosening prevention fastening device as claimed in claim 1, wherein the fixing portion comprises a fixing strip (9), the fixing strip (9) is disposed at one end of the plug pin (3) and is bent toward the screw (1), one end of the mounting groove (4) is provided with a positioning opening portion, a part of the fixing strip (9) is embedded into the positioning opening portion, and another part of the fixing strip (9) is exposed outside the nut (2).
6. The anti-loosening fastening device of claim 1, wherein the mounting groove (4) is obliquely disposed on the surface of the nut (2).
7. The anti-loosening fastening device according to claim 1, wherein at least two mounting grooves (4) are uniformly formed in the surface of the nut (2) along the circumferential direction, and a plug pin (3) is arranged in each mounting groove (4).
8. The anti-loosening fastening device according to claim 1, wherein the plug pin (3) is made of plastic or metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322759030.8U CN220956376U (en) | 2023-10-13 | 2023-10-13 | Locking fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322759030.8U CN220956376U (en) | 2023-10-13 | 2023-10-13 | Locking fastener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220956376U true CN220956376U (en) | 2024-05-14 |
Family
ID=90977291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322759030.8U Active CN220956376U (en) | 2023-10-13 | 2023-10-13 | Locking fastener |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220956376U (en) |
-
2023
- 2023-10-13 CN CN202322759030.8U patent/CN220956376U/en active Active
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| GR01 | Patent grant | ||
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