CN212717585U - Anti-loose bolt and nut - Google Patents
Anti-loose bolt and nut Download PDFInfo
- Publication number
- CN212717585U CN212717585U CN202021802901.XU CN202021802901U CN212717585U CN 212717585 U CN212717585 U CN 212717585U CN 202021802901 U CN202021802901 U CN 202021802901U CN 212717585 U CN212717585 U CN 212717585U
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- nut
- bolt
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- pin
- hole
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Abstract
The utility model provides a locking bolt and nut, wherein the bolt and the nut are respectively provided with an external thread section and an internal thread section which are mutually matched, and the external thread section of the bolt is sunken along the length direction to form a positioning groove; the nut is provided with a through hole which penetrates through the inner thread section along the radial direction, and a pin structure is arranged in the through hole and has a movement trend towards the surface direction of the bolt, so that interference positioning can be formed between the pin structure and the groove edge in the unscrewing direction in the positioning groove when the nut moves towards the loosening direction. Adopt the technical scheme provided by the utility model, the nut in case screw up in place and with round pin structure lock solid, then can not loosen basically and take off.
Description
Technical Field
The utility model relates to a bolt and nut's anti loosening structure.
Background
The bolt and the nut are common mechanical parts in life and production work, are called as mechanical rice, and have the most extensive application.
However, the bolt and nut are generally anti-loose by static friction force, and the bolt and nut are easily loosened and dropped under the action of long-term external force or under the impact of large force, so that the fastening connection of the bolt and nut fails.
SUMMERY OF THE UTILITY MODEL
The invention aims to provide a check bolt nut, which avoids loosening.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a check bolt nut, bolt and nut have the external screw thread section and the internal thread section of mutually supporting respectively, its characterized in that:
the external thread section of the bolt is sunken along the length direction to form a positioning groove;
the nut is provided with a through hole which penetrates through the inner thread section along the radial direction, and a pin structure is arranged in the through hole and has a movement trend towards the surface direction of the bolt, so that interference positioning can be formed between the pin structure and the groove edge in the unscrewing direction in the positioning groove when the nut moves towards the loosening direction.
The lockbolt nut, wherein: the groove edge of the positioning groove in the screwing direction is in an outward-expanding inclined shape, and the groove edge in the unscrewing direction is arranged along the radial direction;
the pin structure is a telescopic pin structure and comprises a one-way pin, an elastic compression piece and a plug which are sequentially abutted; one-way round pin, elasticity receive the perforation of piece and end cap from outer to built-in nut in proper order, and the end cap passes through screw thread fastening connection with fenestrate outer end, and the head end of one-way round pin is worn out and can be with the external screw thread section part butt of bolt from fenestrate inner, and one side of the head end of one-way round pin is the slope form and can be located the groove limit butt of screwing up the direction with the constant head tank, and the opposite side of the head end of one-way round pin is radial extension form and can be located the groove limit butt of unscrewing the direction with the constant head tank.
The lockbolt nut, wherein: a ring of annular groove is arranged on the outer surface of the nut corresponding to the position of the through hole, and a spring hoop is sleeved on the annular groove to prevent the plug from falling off.
The lockbolt nut, wherein: the through hole is a stepped hole;
the pin structure is a clamping pin which is in a step shape, the head end of the clamping pin can penetrate out of a small hole of the stepped hole and is abutted against the positioning groove, and the tail end of the clamping pin penetrates out of a large hole of the stepped hole and is elastically abutted against a spring band sleeved on the outer surface of the nut.
The lockbolt nut, wherein: the groove edges on the two sides of the positioning groove are arranged along the radial direction.
The lockbolt nut, wherein: the bolt is provided with at least one pair of positioning grooves which are oppositely arranged, the nut is provided with two through holes which radially penetrate through the internal thread section and are oppositely arranged, and the two through holes can be matched with the pair of positioning grooves;
the pin structure is a U-shaped elastic hook, two ends of the U-shaped elastic hook are respectively inserted into the two through holes from outside to inside, and the U-shaped elastic hook has a movement tendency of clamping with each other so as to form interference with the pair of positioning grooves.
Compared with the prior art, the utility model discloses the beneficial effect who has is: once the nut is tightened in place and secured with the pin structure, it is substantially not loosened.
Drawings
Fig. 1 is a schematic view of a general cross-sectional structure of a bolt according to a first embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of FIG. 1;
fig. 3 is a schematic structural view of a nut according to a first embodiment of the present invention;
fig. 4 is an exploded view of the retractable pin according to the first embodiment of the present invention;
fig. 5 is a transverse sectional view of the combined structure of the first embodiment of the present invention;
fig. 6 is a schematic structural view of a spring band according to a first embodiment of the present invention;
fig. 7 is a schematic cross-sectional view of a bolt according to a second embodiment of the present invention;
fig. 8 is a schematic structural view of a nut according to a second embodiment of the present invention;
fig. 9 and 10 are front and top views of a locking pin according to a second embodiment of the present invention;
fig. 11 is a transverse sectional view of a composite structure of a second embodiment of the present invention;
fig. 12 is a schematic structural view of a nut according to a third embodiment of the present invention;
fig. 13 is a transverse sectional view of a third embodiment of the composite structure of the present invention.
Description of reference numerals: an external thread section 1; positioning a groove 2; a groove edge 21 in the tightening direction; a groove edge 22 in the unscrewing direction; a perforation 3; a ring groove 4; a one-way pin 5; an elastic pressure receiving member 6; a plug 7; a spring band 8; a locking pin 9; a head end 91 of the locking pin; the tail end 92 of the locking pin; a U-shaped resilient hook 10.
Detailed Description
The utility model discloses a first embodiment provides a flexible round pin formula check bolt nut, wherein:
as shown in fig. 1 and 2, one end of the bolt is a screwing end, the other end of the bolt is provided with an external thread section 1, the external thread section 1 is provided with an external circumferential surface, the external thread section 1 of the bolt is provided with a plurality of positioning grooves 2 recessed in the external circumferential surface along the length direction, the positioning grooves 2 are distributed at equal angle intervals, each positioning groove 2 is provided with a groove bottom and groove edges at two sides of the groove bottom, the groove edge 21 in the screwing direction is in an outward-expanding inclined shape, and the groove edge 22 in the unscrewing direction is arranged along the radial direction;
as shown in fig. 3, the inner side of the nut is provided with an internal thread section, and the nut of the present invention is provided with a plurality of perforations 3 (the positions and the number of the perforations 3 are preferably, but not necessarily, corresponding to the positions and the number of the positioning grooves 2) radially penetrating through the internal thread section, in the present embodiment, the plurality of perforations 3 are located on the same circumference, and the outer surface of the nut is provided with a ring groove 4 corresponding to the circumferential position;
as shown in fig. 4, the device further comprises a telescopic pin structure, which comprises a one-way pin 5, an elastic pressure piece 6 (a spiral spring or a plate spring) and a plug 7 which are abutted in sequence;
as shown in fig. 5, when the nut is installed, a group of telescopic pin structures are arranged in at least one through hole 3 of the nut; the one-way pin 5, the elastic compression piece 6 and the plug 7 are sequentially arranged in the through hole 3 of the nut from outside to inside, the plug 7 is fixedly connected with the outer end of the through hole 3 through threads, so that the one-way pin 5 and the elastic compression piece 6 cannot fall out outwards, the head end of the one-way pin 5 penetrates out of the inner end of the through hole 3 and can be abutted against the part of the external thread section 1 of the bolt, the tail end of the one-way pin 5 is larger than the inner end of the through hole 3 in size and cannot fall out inwards, one side of the head end of the one-way pin 5 is inclined and can be abutted against the groove edge 21 of the positioning groove 2 in the screwing direction, and the other side of the head end of the one-way pin 5 is radially extended and can be abutted against the groove edge 22; after the telescopic pin structure is installed, a spring band 8 (as shown in fig. 6) is sleeved on the annular groove 4 to prevent the plug 7 from falling off;
thus, in the process of screwing the nut, the head end of the one-way pin 5 has a tendency of penetrating out from the inner end of the through hole 3 under the action of the elastic force of the elastic pressure piece 6, if the position of the outer surface of the bolt opposite to the through hole 3 is a thread, the head end of the one-way pin 5 is blocked, if the position of the outer surface of the bolt opposite to the through hole 3 is the positioning groove 2, the head end of the one-way pin 5 extends into the positioning groove 2, and because the inclined side of the head end of the one-way pin 5 is abutted against the groove edge 21 (also inclined) of the positioning groove 2 in the screwing direction, the head end of the one-way pin 5 is retracted inwards, passes over the positioning groove 2 and is screwed continuously until the preset fastening position is reached;
at the moment, if the position of the outer surface of the bolt, which is opposite to the through hole 3, is the positioning groove 2, the screwing operation is stopped, and the head end of the one-way pin 5 is ensured to be clamped into the positioning groove 2; if the outer surface of the bolt is provided with threads opposite to the through hole 3, care is not needed, and if the nut moves towards the loosening direction, once the through hole 3 is opposite to the positioning groove 2, the head end of the one-way pin 5 can be clamped into the positioning groove 2 under the action of elastic force;
once the nut is tightened in place and secured with the pin structure, it is essentially not loosened because: when the nut has a loosening movement tendency, one side of the head end of the one-way pin 5, which extends in the radial direction, can abut against the groove edge 22 (arranged in the radial direction) of the positioning groove 2 in the loosening direction, so that the nut cannot rotate in the loosening direction.
If the nut needs to be unscrewed, the spring band 8 can be taken off, then the plug 7 at the outer end of the through hole 3 is screwed out (or broken and taken out) and then the one-way pin 5 is taken out of the through hole 3, so that the nut can be rotated normally, and the nut and the bolt can be separated smoothly.
And the utility model provides a second embodiment is a bayonet type anticreep bolt nut, wherein:
the structure of the bolt is similar to that of the first embodiment, one end of the bolt is a screwing end, the other end of the bolt is provided with an external thread section 1, the external thread section 1 is provided with an outer circumferential surface, a plurality of positioning grooves 2 which are sunken in the outer circumferential surface are arranged on the external thread section 1 of the bolt along the length direction, the positioning grooves 2 are distributed at equal angle intervals, and each positioning groove 2 is provided with a groove bottom and groove edges at two sides of the groove bottom; the difference is that as shown in fig. 1 and 7, the two sides of the positioning slot 2 are arranged along the radial direction;
the nut structure is similar to the first embodiment, and a plurality of through holes 3 are also arranged on the nut, and the through holes penetrate through the internal thread section along the radial direction (the positions and the number of the through holes 3 are preferably corresponding to those of the positioning grooves 2, but not corresponding to those of the positioning grooves); in this embodiment, the plurality of through holes 3 are located on the same circumference, and a ring of annular grooves 4 are formed on the outer surface of the nut corresponding to the circumference; the difference is that, as shown in fig. 8, the through hole 3 is a stepped hole;
as shown in fig. 9 and 10, a clamping pin 9 is provided, the clamping pin 9 is in a step shape, a head end 91 can penetrate through a small hole of the stepped hole (the through hole 3) and is abutted against the positioning groove 2, and a tail end 92 penetrates through a large hole of the stepped hole (the through hole 3) and is elastically abutted against a spring band 8 sleeved on the outer surface of the nut;
as shown in fig. 11, during installation, the nut is screwed in place, then the alignment condition of the through hole 3 and the positioning groove 2 is observed, if the two positions are opposite, the clamping pin 9 is inserted into the through hole 3, and the head end 91 of the clamping pin 9 gradually penetrates out of the small hole of the stepped hole to the positioning groove 2 to form clamping positioning by means of the threaded fit of the tail end 92 of the clamping pin 9 and the large hole of the stepped hole; if the through hole 3 and the positioning groove 2 have a dislocation condition, care is not needed, the spring band 8 is sleeved, and if the nut moves towards the loosening direction, once the through hole 3 is opposite to the positioning groove 2, the clamping pin 9 can be inserted into the positioning groove 2 under the elastic force action of the spring band 8 to form clamping positioning.
Once the nut is tightened in place and secured with the pin structure, it is essentially not loosened because: when the nut has a tendency to loosen, the side of the head end of the locking pin 9 abuts against the groove edge 22 (arranged radially) of the positioning groove 2 in the loosening direction, so that the nut cannot rotate in the loosening direction.
If the nut needs to be unscrewed, the spring band 8 can be taken off, and then the clamping pin 9 is screwed out of the through hole 3 in the reverse direction, so that the nut can be rotated normally, and the nut and the bolt can be separated smoothly.
The utility model provides a third embodiment is an external round pin formula anticreep bolt nut, wherein:
the structure of the bolt is shown in fig. 1 and 7, which is not described herein; it is emphasized that the bolt is provided with at least one pair of positioning grooves 2 which are oppositely arranged (preferably symmetrically arranged at an angle of 180 degrees);
the structure of the nut is as shown in fig. 12, two through holes 3 which penetrate through the internal thread section along the radial direction and are opposite in position are arranged on the nut, and the two through holes 3 are preferably symmetrically arranged at an angle of 180 degrees;
during installation, as shown in fig. 13, the nut is firstly screwed in place, and then whether the two through holes 3 are matched with the positions of the pair of positioning grooves 2 or not is observed; if the two positions are matched, the two ends of the U-shaped elastic hook 10 are respectively inserted into the two through holes 3 to form interference with the pair of positioning grooves 2; if perforation 3 and constant head tank 2 have the dislocation condition, also needn't care, directly insert two perforation 3 respectively with the both ends of the elastic hook 10 of U-shaped can, if the nut during toward the direction motion of taking off, in case perforation 3 matches with constant head tank 2 position, the both ends of the elastic hook 10 of U-shaped can be closed up under the effect of elastic force and insert in the constant head tank 2.
Once the nut is tightened in place and secured with the pin structure, it is essentially not loosened because: when the nut has a tendency to loosen, the U-shaped elastic hook 10 abuts against the groove edge 22 (arranged radially) of the positioning groove 2 in the loosening direction, so that the nut cannot rotate in the loosening direction.
If the nut needs to be unscrewed, the U-shaped elastic hook 10 can be taken off first, and the nut can be rotated normally, so that the nut and the bolt can be separated smoothly.
The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. The utility model provides a check bolt nut, bolt and nut have the external screw thread section and the internal thread section of mutually supporting respectively, its characterized in that:
the external thread section of the bolt is sunken along the length direction to form a positioning groove;
the nut is provided with a through hole which penetrates through the inner thread section along the radial direction, and a pin structure is arranged in the through hole and has a movement trend towards the surface direction of the bolt, so that interference positioning can be formed between the pin structure and the groove edge in the unscrewing direction in the positioning groove when the nut moves towards the loosening direction.
2. The lockbolt nut of claim 1 wherein: the groove edge of the positioning groove in the screwing direction is in an outward-expanding inclined shape, and the groove edge in the unscrewing direction is arranged along the radial direction;
the pin structure is a telescopic pin structure and comprises a one-way pin, an elastic compression piece and a plug which are sequentially abutted; one-way round pin, elasticity receive the perforation of piece and end cap from outer to built-in nut in proper order, and the end cap passes through screw thread fastening connection with fenestrate outer end, and the head end of one-way round pin is worn out and can be with the external screw thread section part butt of bolt from fenestrate inner, and one side of the head end of one-way round pin is the slope form and can be located the groove limit butt of screwing up the direction with the constant head tank, and the opposite side of the head end of one-way round pin is radial extension form and can be located the groove limit butt of unscrewing the direction with the constant head tank.
3. The lockbolt nut of claim 2 wherein: a ring of annular groove is arranged on the outer surface of the nut corresponding to the position of the through hole, and a spring hoop is sleeved on the annular groove to prevent the plug from falling off.
4. The lockbolt nut of claim 1 wherein: the through hole is a stepped hole;
the pin structure is a clamping pin which is in a step shape, the head end of the clamping pin can penetrate out of a small hole of the stepped hole and is abutted against the positioning groove, and the tail end of the clamping pin penetrates out of a large hole of the stepped hole and is elastically abutted against a spring band sleeved on the outer surface of the nut.
5. The lockbolt nut of claim 4 wherein: the groove edges on the two sides of the positioning groove are arranged along the radial direction.
6. The lockbolt nut of claim 1 wherein: the bolt is provided with at least one pair of positioning grooves which are oppositely arranged, the nut is provided with two through holes which radially penetrate through the internal thread section and are oppositely arranged, and the two through holes can be matched with the pair of positioning grooves;
the pin structure is a U-shaped elastic hook, two ends of the U-shaped elastic hook are respectively inserted into the two through holes from outside to inside, and the U-shaped elastic hook has a movement tendency of clamping with each other so as to form interference with the pair of positioning grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021802901.XU CN212717585U (en) | 2020-08-25 | 2020-08-25 | Anti-loose bolt and nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021802901.XU CN212717585U (en) | 2020-08-25 | 2020-08-25 | Anti-loose bolt and nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212717585U true CN212717585U (en) | 2021-03-16 |
Family
ID=74924243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021802901.XU Expired - Fee Related CN212717585U (en) | 2020-08-25 | 2020-08-25 | Anti-loose bolt and nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212717585U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112032178A (en) * | 2020-08-25 | 2020-12-04 | 马文武 | Anti-loose bolt and nut |
| CN115773303A (en) * | 2022-12-19 | 2023-03-10 | 蔚来汽车科技(安徽)有限公司 | Anti-loose fastening device |
-
2020
- 2020-08-25 CN CN202021802901.XU patent/CN212717585U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112032178A (en) * | 2020-08-25 | 2020-12-04 | 马文武 | Anti-loose bolt and nut |
| CN115773303A (en) * | 2022-12-19 | 2023-03-10 | 蔚来汽车科技(安徽)有限公司 | Anti-loose fastening device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210316 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |