CN210106366U - Anti-loose nut - Google Patents
Anti-loose nut Download PDFInfo
- Publication number
- CN210106366U CN210106366U CN201920844717.2U CN201920844717U CN210106366U CN 210106366 U CN210106366 U CN 210106366U CN 201920844717 U CN201920844717 U CN 201920844717U CN 210106366 U CN210106366 U CN 210106366U
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- screw
- nut body
- hole
- loosening
- locknut
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Abstract
The utility model provides a locknut, including the nut body, nut body center is equipped with the main thread that runs through whole nut body and set up, nut body lateral wall is equipped with the thread root and the tangent vice screw hole in main thread crest, vice screw hole is the blind hole, vice screw hole internal rotation has with vice screw hole screw-thread fit's check screw, check screw is equipped with the screwhead towards the one end of vice screw hole orifice department, the screwhead terminal surface is equipped with interior hexagonal hole, check screw and screwhead be integrated into one piece, its material is alloy steel material, the hardness of bolt when quenching hardness is greater than the nut body and revolves on the bolt. The utility model has the advantages of firm in connection is reliable, can avoid appearing not hard up under the condition that bears various impact load.
Description
Technical Field
The utility model relates to a machine part field, concretely relates to locknut.
Background
The looseness-proof effect of the nut depends on the looseness-proof mode, and at present, three looseness-proof modes are commonly used.
The first is friction locking, which is the most widely used locking method that generates a positive pressure between the thread pairs that is independent of external forces to generate a frictional force that prevents the thread pairs from rotating relative to each other. This positive pressure can be achieved by axial or simultaneous two-way compression of the thread pairs. Such as an elastic washer, a double nut, a self-locking nut, a nylon insert locking nut and the like. The anti-loosening mode is convenient for disassembling the nut, but under the conditions of impact, vibration and variable load, the pretightening force of the bolt is reduced due to loosening, the lost pretightening force is slowly increased along with the increase of the vibration times, and finally the nut is loosened and the threaded connection fails.
The second way is mechanical anti-loosening, which is to use a stopper to directly limit the relative rotation of the screw pair. Such as the use of cotter pins, tandem wires, and stop washers. This way the disassembly is inconvenient.
The third mode is riveting and punching looseness prevention, and after the screw is screwed down, methods such as point punching, welding, bonding and the like are adopted, so that the screw pair loses the characteristics of a kinematic pair and is connected into non-detachable connection. The disadvantage of this method is that the bolt can only be used once and is difficult to remove, and the bolt pair must be destroyed to be removed.
The three anti-loosening modes mainly rely on the third party to loosen, and mainly refer to friction. The second and third types use two completely different ways, namely the third type needs to be disassembled to damage the bolt pair, and the second type is troublesome to disassemble.
SUMMERY OF THE UTILITY MODEL
Based on the problem, the utility model aims to provide a firm in connection is reliable, can avoid appearing not hard up locknut under the condition that bears various impact load.
Aiming at the problems, the following technical scheme is provided: the utility model provides a locknut, includes the nut body, nut body center is equipped with the main thread that runs through whole nut body and set up, nut body lateral wall is equipped with the tangent vice screw hole in bottom of a tooth and main thread crest, vice screw hole is the blind hole, vice screw hole internal rotation have with vice screw hole screw-thread fit's check screw, check screw is equipped with the screwhead towards the one end of vice screw hole orifice department, the screwhead terminal surface is equipped with interior hexagonal hole, check screw and screwhead are integrated into one piece, and its material is alloy steel material, the hardness of bolt when quenching hardness is greater than the nut body and revolves on the bolt.
In the structure, after the nut body is screwed on the bolt and pre-tightened, the screw thread of the anti-loosening screw is meshed with the crest of the screw thread of the bolt through screwing in the anti-loosening screw, so that the nut body and the bolt are prevented from being reversely screwed out when impacted, and the anti-loosening screw needs to be extruded out of the screw thread on the crest of the screw thread when anti-loosening is realized, so that the hardness of the anti-loosening screw is higher than that of the bolt, and the inner hexagon wrench can be inserted into the inner hexagon hole to reversely loosen the anti-loosening screw when being disassembled at the later stage, so that the nut body is disassembled.
The utility model discloses further set up to, set up outer slot on the screwhead outer cylinder wall of locking screw and screwhead junction.
In the structure, for some occasions which do not require disassembly or one-time permanent connection, the connection strength between the screw head and the anti-loosening screw is weakened by arranging the outer groove, when the anti-loosening screw is completely screwed in and is abutted against the bottom of the auxiliary threaded hole, the torque is further increased, so that the screw head and the anti-loosening screw are broken along the outer groove, the screw head is separated and falls off, the disassembly possibility is avoided, and the one-time fixing purpose is realized.
The utility model discloses further set up to, outer slot annealing hardness and intensity are less than locking screw and screwhead.
In the above structure, in order to further weaken the material strength at the outer groove position, annealing treatment needs to be performed on the outer groove.
The utility model discloses further set up to, locking screw is equipped with a plurality of chip grooves of seting up along locking screw axial direction on the screw thread of the one end of vice screw hole bottom, its outer cylinder wall, the chip groove sets up along locking screw circumference direction equipartition, and it sets up the degree of depth and progressively shallows towards the screwhead direction.
In the structure, when the anti-loosening screw bites into the crest on the bolt during screwing in, the crest material is extruded, the extrusion force can influence the screwing in of the anti-loosening screw, and therefore the chip discharge groove is arranged, the extrusion chips of partial bolt crests are accommodated by the chip discharge groove, and the anti-loosening screw is favorably screwed in completely.
The utility model discloses further set up to, the nut body is regular hexagon, the counter thread hole is seted up on the regular hexagon lateral wall.
The utility model discloses further set up to, when locking screw screwed in vice screw hole completely, its screwhead is not higher than vice screw hole drill way.
In the structure, the screw head can be prevented from protruding out of the nut body to influence the appearance; meanwhile, the auxiliary threaded hole opening can be filled in by a spot welding filling mode when necessary, so that the possibility of being disassembled is completely avoided.
The utility model discloses further set up to, screwhead external diameter is less than or equal to locking screw thread path.
In the structure, the contact between the screw head and the thread root on the inner wall of the secondary threaded hole can be avoided when the screw head is screwed in.
The utility model discloses further set up as, the nut body is alloy steel material, its quenching hardness is the same with locking screw.
In the structure, because the anti-loosening screw extrudes the screw crest to generate extrusion force when screwing in, if the hardness of the nut body is too low, the thread form of the inner wall of the auxiliary threaded hole is easy to cause thread slipping.
The utility model discloses further set up to, nut body surface is equipped with the copper plate, the copper plate surface is equipped with chromium coating.
In the above structure, the corrosion resistance of the nut body can be increased.
The utility model has the advantages that: after the nut body is screwed on the bolt and is pre-tightened, the thread of the anti-loosening screw is meshed with the crest of the thread of the bolt through screwing in the anti-loosening screw, so that the nut body and the bolt are prevented from being reversely screwed out when being impacted, and the anti-loosening screw needs to be extruded out of the thread on the crest of the thread of the bolt when being prevented from being loosened, so that the hardness of the anti-loosening screw is higher than that of the bolt, and the hexagon socket wrench can be inserted into the hexagon socket hole to reversely loosen the anti-loosening screw when being disassembled at a later stage, so that the nut body is disassembled.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is the schematic view of the nut body full-section structure of the present invention.
Fig. 3 is a schematic diagram of the explosion structure of the present invention.
The reference numbers in the figures mean: 10-a nut body; 11-main thread; 12-minor threaded hole; 20-a lock screw; 21-screw head; 22-hexagon socket; 23-outer groove; 24-chip grooves.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
Referring to fig. 1 to 3, the locknut shown in fig. 1 to 3 includes a nut body 10, a main thread 11 is provided at the center of the nut body 10 and penetrates through the entire nut body 10, a secondary threaded hole 12 is provided on the outer side wall of the nut body 10, the root of the secondary threaded hole 12 is tangential to the crest of the main thread 11, the secondary threaded hole 12 is a blind hole, a lockscrew 20 in threaded engagement with the secondary threaded hole 12 is screwed into the secondary threaded hole 12, a screw head 21 is provided at one end of the lockscrew 20 facing the hole of the secondary threaded hole 12, an inner hexagonal hole 22 is provided on the end surface of the screw head 21, the lockscrew 20 and the screw head 21 are integrally formed, and the lockscrew 20 and the screw head 21 are made of an alloy steel material and have a quenching hardness greater than that of a bolt (not shown in the figures.
In the above structure, after the nut body 10 is screwed on the bolt and pre-tightened, the locking screw 20 is screwed in to make the thread of the locking screw 20 bite into the crest of the bolt thread, thereby preventing the nut body 10 and the bolt from being reversely screwed out when being impacted, because the locking screw 20 needs to extrude the thread on the crest of the bolt thread when realizing locking, the hardness of the locking screw 20 must be higher than that of the bolt, when needing to be disassembled at later stage, a socket head wrench (not shown in the figure) can be inserted into the socket head hole 22 to reversely loosen the locking screw 20, thereby realizing the disassembly of the nut body 10.
In this embodiment, an outer cylindrical wall of the screw head 21 at the connection position of the anti-loosening screw 20 and the screw head 21 is provided with an outer groove 23.
In the structure, for some occasions which do not require disassembly or one-time permanent connection, the connecting strength between the screw head 21 and the anti-loose screw 20 is weakened by arranging the outer groove chip 23, when the anti-loose screw 20 is completely screwed into the bottom of the hole of the secondary threaded hole 12 to be abutted against, the torque is further increased to enable the position between the screw head 21 and the anti-loose screw 20 along the outer groove 23 to be broken, so that the screw head 21 is separated and separated, the possibility of disassembly is avoided, and the purpose of one-time fixing is realized.
In the present embodiment, the annealing hardness and strength of the outer groove 23 are smaller than those of the locking screw 20 and the screw head 21.
In the above structure, in order to further weaken the material strength at the position of the outer trench 23, annealing treatment is required.
In this embodiment, a plurality of chip grooves 24 formed along the axial direction of the locking screw 20 are formed in the thread of the outer cylindrical wall of the locking screw 20 at the end of the locking screw 20 facing the hole bottom of the secondary threaded hole 12, and the chip grooves 24 are uniformly distributed along the circumferential direction of the locking screw 20 and are formed with depths gradually becoming shallower in the direction of the screw head 21.
In the above structure, when the locking screw 20 bites into the crest of the bolt during screwing, the crest material is extruded, and the extrusion force affects the screwing of the locking screw 20, so that the chip discharge groove 24 is provided, and the chip discharge groove 24 is used for accommodating the extrusion chips of partial bolt crests, thereby being beneficial to the complete screwing of the locking screw 20.
In this embodiment, the nut body 10 is a regular hexagon, and the sub-threaded hole 12 is opened in a side wall of the regular hexagon.
In the present embodiment, when the anti-loose screw 20 is completely screwed into the secondary threaded hole 12, the screw head 21 is not higher than the aperture of the secondary threaded hole 12.
In the structure, the screw head 21 can be prevented from protruding out of the nut body 10 to affect the appearance; meanwhile, if necessary, an over-spot welding filling mode can be provided to fill the opening of the secondary threaded hole 12, so that the possibility of being disassembled is completely avoided.
In this embodiment, the outer diameter of the screw head 21 is smaller than or equal to the small diameter of the screw thread of the anti-loose screw 20.
In the above configuration, the screw head 21 is prevented from coming into contact with the thread root on the inner wall of the sub-screw hole 12 when screwing in.
In this embodiment, the nut body 10 is made of alloy steel, and has the same quenching hardness as the locking screw 20.
In the above structure, since the anti-loosening screw 20 extrudes the screw crest during screwing in, if the hardness of the nut body 10 is too low, the thread profile of the inner wall of the secondary threaded hole 12 is easy to slip.
In this embodiment, the nut body 10 has a copper plated layer (not shown) on the outer surface thereof, and a chromium plated layer (not shown) on the outer surface thereof.
In the above structure, the corrosion resistance of the nut body 10 can be increased.
The utility model has the advantages that: after the nut body 10 is screwed on the bolt and pre-tightened, the thread of the anti-loosening screw 20 is engaged with the crest of the bolt thread by screwing in the anti-loosening screw 20, so that the nut body 10 and the bolt are prevented from being reversely screwed out when being impacted, and because the anti-loosening screw 20 needs to extrude the thread on the crest of the bolt thread when realizing anti-loosening, the hardness of the anti-loosening screw 20 needs to be higher than that of the bolt, and a hexagon socket wrench (not shown in the figure) can be inserted into the hexagon socket hole 22 to reversely loosen the anti-loosening screw 20 when needing to be disassembled at a later stage, so that the nut body 10 is disassembled.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations of the above assumption should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides a locknut, includes the nut body, nut body center is equipped with the main thread that runs through whole nut body and set up which characterized in that: the nut body lateral wall is equipped with the tangent vice screw hole in thread bottom and main thread crest, vice screw hole is the blind hole, vice screw hole internal rotation has with vice screw hole thread fit's check screw, check screw is equipped with the screwhead towards the one end of vice screw hole orifice department, screwhead terminal surface is equipped with interior hexagonal hole, check screw and screwhead are integrated into one piece, and its material is alloy steel material, and the hardness of quenching is greater than the hardness of bolt when the nut body revolves on the bolt.
2. The locknut of claim 1, wherein: an outer cylindrical wall of the screw head at the joint of the anti-loosening screw and the screw head is provided with an outer groove.
3. The locknut of claim 2, wherein: the annealing hardness and the strength of the outer groove are smaller than those of the anti-loosening screw and the screw head.
4. The locknut of claim 1, wherein: the anti-loosening screw is characterized in that a plurality of chip grooves formed in the axial direction of the anti-loosening screw are formed in the threads of the outer cylindrical wall of one end, facing the hole bottom of the auxiliary threaded hole, of the anti-loosening screw, the chip grooves are uniformly distributed in the circumferential direction of the anti-loosening screw, and the depth of the chip grooves formed in the screw head direction becomes shallow gradually.
5. The locknut of claim 1, wherein: the nut body is in a regular hexagon shape, and the auxiliary threaded hole is formed in the side wall of the regular hexagon.
6. The locknut of claim 1, wherein: when the anti-loosening screw is completely screwed into the auxiliary threaded hole, the screw head of the anti-loosening screw is not higher than the orifice of the auxiliary threaded hole.
7. The locknut of claim 1, wherein: the outer diameter of the screw head is smaller than or equal to the small diameter of the screw thread of the anti-loosening screw.
8. The locknut of claim 1, wherein: the nut body is made of alloy steel, and the quenching hardness of the nut body is the same as that of the anti-loosening screw.
9. The locknut of claim 1, wherein: the nut body outer surface is equipped with the copper-plated layer, the copper-plated layer outer surface is equipped with the chromium coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920844717.2U CN210106366U (en) | 2019-06-03 | 2019-06-03 | Anti-loose nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920844717.2U CN210106366U (en) | 2019-06-03 | 2019-06-03 | Anti-loose nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210106366U true CN210106366U (en) | 2020-02-21 |
Family
ID=69562331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920844717.2U Expired - Fee Related CN210106366U (en) | 2019-06-03 | 2019-06-03 | Anti-loose nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210106366U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113039997A (en) * | 2021-04-24 | 2021-06-29 | 北京青城生态园林有限公司 | Landscape plant curing means |
-
2019
- 2019-06-03 CN CN201920844717.2U patent/CN210106366U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113039997A (en) * | 2021-04-24 | 2021-06-29 | 北京青城生态园林有限公司 | Landscape plant curing means |
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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: 20200221 Termination date: 20210603 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |