CN211039353U - Anti-loosening fastener - Google Patents
Anti-loosening fastener Download PDFInfo
- Publication number
- CN211039353U CN211039353U CN201921884849.4U CN201921884849U CN211039353U CN 211039353 U CN211039353 U CN 211039353U CN 201921884849 U CN201921884849 U CN 201921884849U CN 211039353 U CN211039353 U CN 211039353U
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- loose
- spline
- locknut
- fastening nut
- fastener
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Abstract
The utility model discloses a locking fastener, including bolt, fastening nut and locknut, the characteristics are that at least one in two relative terminal surfaces of fastening nut and locknut is first inclined plane, make the thickness inequality of the left and right both sides of fastening nut or locknut, fastening nut is provided with first flower tooth on the terminal surface of one end towards locknut, locknut is provided with the second flower tooth on the terminal surface of one end towards fastening nut, the direction of rotation of second flower tooth is the same with the direction of rotation of first flower tooth and is interlock mutually, make the part that lies in locknut in the bolt and outside produce the microbending; the anti-loosening fastener has the advantages that when a workpiece is fixed, the parts of the bolt, which are positioned in the anti-loosening nut and outside, are slightly bent, and the parts of the bolt, which are positioned in the fastening nut and the workpiece, are not deformed, so that the fastening nut and the anti-loosening nut cannot rotate anticlockwise and are loosened after being vibrated, and the anti-loosening effect of the fastener is good.
Description
Technical Field
The utility model relates to a fastener for fixing two or more than two parts especially relates to a locking fastener.
Background
Fasteners are the most common mechanical parts used in everyday life and modern industry for securing two or more workpieces, and are mainly composed of bolts, nuts and washers. With the development of science and technology, the requirements on the fastening piece are higher and higher, and the fastening piece is required to be not loosened particularly in the fields of spaceflight, high-speed rails, ships, military affairs and the like. The existing anti-loose fasteners mostly adopt a mode of arranging the spline teeth on double nuts, and the structure is suitable for static occasions or workpieces, but when strong vibration is received, the double nuts can synchronously rotate and loosen, so that the anti-loose fasteners cannot be used for high-speed rail tracks, cylinder heads of engines and other occasions which are easy to vibrate. The anti-loose fastener required to be used in the occasions is mainly imported into Japan at present, but the price is higher, the structure is complex, and the fastening stress section of the bolt deforms when being fastened, so that the service life of the bolt is influenced, and the bolt cannot be reused.
Disclosure of Invention
The utility model aims to solve the technical problem that a locking fastener is provided, its simple structure, low in manufacturing cost, and the long service life of bolt, repeatedly usable.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a kind of loose-proof fastener, including bolt, fastening nut and locknut, the said fastening nut and at least one in two relative terminal surfaces of the said locknut is the first inclined plane, make the said fastening nut or the thickness of the left and right sides of the said locknut unequal, the said fastening nut is faced to there are first teeth on the terminal surface of one end of the said locknut, the said locknut is faced to there are second teeth on the terminal surface of one end of the said fastening nut, the direction of rotation of the said second teeth is the same and is occluded with the direction of rotation of the said first teeth, make the said bolt lie in the said locknut in and part of the outside produce the microbending.
Furthermore, the end face of one end of the fastening nut, which faces the locknut, is a first inclined plane, and the first spline teeth are arranged on the first inclined plane; or the end surface of one end of the locknut, which faces the fastening nut, is a first inclined surface, the second spline is arranged on the first inclined surface, and the inclination angle of the first inclined surface is 2.6-3.9 degrees.
Furthermore, the end face of the fastening nut facing the one end of the locknut and the end face of the locknut facing the one end of the fastening nut are both first inclined planes, the sum of the inclination angles of the two first inclined planes is 2.6-3.9 degrees, and the first spline teeth and the second spline teeth are respectively arranged on the corresponding first inclined planes.
Furthermore, the rotation directions of the first spline teeth and the second spline teeth are both clockwise.
Furthermore, the locknut is a flange nut, and the second spline is arranged on the end face, facing the fastening nut, of the flange nut.
A kind of anti-loose fastener, including bolt, first anti-loose shim and second anti-loose shim, the said first anti-loose shim is the hexagon shape, the said first anti-loose shim is towards the end surface of the work piece to have third castellations, when the anti-loose fastener is used for fixing the work piece, the said third castellations bite into the work piece, at least one of the two opposite end surfaces of the said first anti-loose shim and the said second anti-loose shim is the second inclined plane, make the thickness of the left, right both sides of the said first anti-loose shim or the said second anti-loose shim unequal, the said first anti-loose shim is towards the said end surface of the second anti-loose shim to have fourth castellations, the said second anti-loose shim is towards to have fifth castellations on the said end surface of the first anti-loose shim, the direction of the said fifth castellations is the same as and bites mutually with the direction of the said fourth castellations, and the part of the bolt between the second anti-loosening gasket and the bolt head is slightly bent, the second anti-loosening gasket is provided with a hexagon socket, and the bolt head of the bolt is embedded into the hexagon socket and matched with the hexagon socket.
Furthermore, the first anti-loosening gasket is made of manganese steel or spring steel.
Furthermore, the end surface of the first anti-loosening gasket, which faces the second anti-loosening gasket, is a second inclined surface, and the fourth spline is arranged on the second inclined surface; or the end surface of the second anti-loosening gasket facing the first anti-loosening gasket is a second inclined surface, the fifth spline is arranged on the second inclined surface, and the inclination angle of the second inclined surface is 2.6-3.9 degrees.
Furthermore, the end face of the first anti-loose gasket facing the second anti-loose gasket and the end face of the second anti-loose gasket facing the first anti-loose gasket are both second inclined planes, the sum of the inclination angles of the two second inclined planes is 2.6-3.9 degrees, and the fourth spline teeth and the fifth spline teeth are respectively arranged on the second inclined planes corresponding to the fourth spline teeth and the fifth spline teeth.
Furthermore, the rotation directions of the third spline tooth, the fourth spline tooth and the fifth spline tooth are all clockwise.
Compared with the prior art, the utility model has the advantages that:
(1) because at least one of the two opposite end surfaces of the fastening nut and the locknut is a first inclined surface and is meshed with each other through the spline, when the workpiece is fixed together with the bolt, the parts of the bolt positioned in the locknut and the outer side of the bolt are slightly bent, and the parts of the bolt positioned in the fastening nut and the workpiece are not deformed, so that the fastening nut and the locknut cannot simultaneously rotate anticlockwise to be loosened after being vibrated, and the fastener has a good anti-loosening effect; in a similar way, at least one of the two opposite end faces of the first anti-loosening gasket and the second anti-loosening gasket is a second inclined face and is meshed with each other through the spline teeth, and when the first anti-loosening gasket and the second anti-loosening gasket fix a workpiece together, the meshing force between the third spline teeth on the first anti-loosening gasket and the workpiece can be increased, so that the fastener has a good anti-loosening effect.
(2) When the locknut or the bolt is screwed out, the part of the bolt which is slightly bent can be restored, the repeated use of the bolt is not influenced, and the service life of the bolt is longer.
(3) Because first check washer is hexagon shape outward, when fixed work piece, can block first check washer with the spanner, make the third spline on the first check washer not imbed the work piece in the state of rotation, guaranteed the good interlock state and the good occlusal force of third spline and work piece.
(4) The locking fastener is simple in structure, the bolt is a universal part, only the fastening nut, the locknut, the first locking gasket and the second locking gasket need to be customized, the manufacturing process is simple, cold heading or hot heading process can be formed in one step, and cost is greatly reduced.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;
fig. 2 is a front view of a fastening nut according to a first embodiment of the present invention;
FIG. 3 is a top view of FIG. 2;
fig. 4 is a bottom view of a locknut according to a first embodiment of the present invention;
fig. 5 is a schematic view of a first embodiment of the present invention in a use state;
fig. 6 is a schematic structural diagram of a second embodiment of the present invention;
fig. 7 is a front view of a first anti-loose gasket according to a second embodiment of the present invention;
FIG. 8 is a bottom view of FIG. 7;
FIG. 9 is a top view of FIG. 7;
fig. 10 is a top view of a second anti-loose pad according to a second embodiment of the present invention;
fig. 11 is a bottom view of a second anti-loose pad according to a second embodiment of the present invention;
fig. 12 is a schematic view of a use state of the second embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
In the first embodiment, as shown in the figure, the anti-loose fastener comprises a bolt 1, a fastening nut 2 and an anti-loose nut 3, wherein an end surface of the fastening nut 2 facing the anti-loose nut 3 is a first inclined surface 21, an inclination angle α of the first inclined surface 21 can be selected within a range of 2.6 degrees to 3.9 degrees, so that thicknesses of the left side and the right side of the fastening nut 2 are not equal, as shown in fig. 2, a first spline 22 is arranged on the first inclined surface 21, an end surface of the anti-loose nut 3 facing the fastening nut 2 is a normal horizontal surface and is provided with a second spline 31, a rotation direction of the second spline 31 is the same as that of the first spline 22, and the second spline 31 is engaged with the first spline, so that parts of the bolt 1, which are located inside and outside the anti-loose nut 3, are slightly bent, as shown.
In the first embodiment, the turning directions of the first spline 22 and the second spline 31 can be set to be clockwise according to the standard locking turning direction of the nut; the locknut 3 may also be a flange nut, and the second spline 31 is disposed on an end surface of the flange nut facing the fastening nut 2.
Besides, besides the structure shown in the attached drawings, the end surface of the locknut 3 facing the fastening nut 2 can be a first inclined surface, the inclination angle of the first inclined surface can be selected within the range of 2.6-3.9 degrees, so that the thicknesses of the left side and the right side of the locknut 3 are unequal, the end surface of the fastening nut 2 facing the locknut 3 is a conventional horizontal plane, and the second spline 31 is arranged on the first inclined surface; the end face of the fastening nut 2 facing the locknut 3 and the end face of the locknut 3 facing the fastening nut 2 can be both first inclined planes, and the sum of the inclination angles of the two first inclined planes can be selected within the range of 2.6-3.9 degrees, so that the thicknesses of the left side and the right side of the fastening nut 2 and the locknut 3 are not equal, and the first spline teeth 22 and the second spline teeth 31 are respectively arranged on the corresponding first inclined planes.
In the second embodiment, as shown in the drawing, a loose-proof fastener includes a bolt 4, a first loose-proof washer 5 and a second loose-proof washer 6, the first loose-proof washer 5 is in an outer hexagon shape, a third spline 51 is provided on an end surface of the first loose-proof washer 5 facing a workpiece 7, when the loose-proof fastener is used for fixing the workpiece 7, the third spline 51 bites into the workpiece 7, the end surface of the first loose-proof washer 5 facing the second loose-proof washer 6 is a second inclined surface 52, an inclination angle β of the second inclined surface 52 can be selected within a range of 2.6 ° to 3.9 °, the thicknesses of the left and right sides of the first loose-proof washer 5 are not equal, as shown in fig. 7, a fourth spline 53 is provided on the second inclined surface 52, the end surface of the second loose-proof washer 6 facing the first loose-proof washer 5 is a conventional horizontal plane and is provided with a fifth spline 61, the direction of the fifth spline 61 is the same as the direction of the fourth spline 53 and is engaged, so that a portion of the bolt 4 located between the second loose-proof washer 6 and the bolt head 41 is provided with a hexagon bolt head 62, and the bolt 4 is inserted into a hexagon bolt head 62, as shown in a hexagon bolt head 62, and a hexagon bolt head 62 is provided.
In the second embodiment, the material of the first anti-loose pad 5 may be manganese steel or spring steel, so that the third spline 51 on the first anti-loose pad 5 is easy to bite into the workpiece 7; the rotation directions of the third spline 51, the fourth spline 53 and the fifth spline 61 are all clockwise.
Besides, besides the structure shown in the attached drawings, the end surface of the second anti-loose gasket 6 facing the first anti-loose gasket 5 can be a second inclined surface, the inclination angle of the second inclined surface can be selected within the range of 2.6-3.9 degrees, so that the thicknesses of the left side and the right side of the second anti-loose gasket 6 are unequal, the end surface of the first anti-loose gasket 5 facing the second anti-loose gasket 6 is a conventional horizontal plane, and the fifth spline 61 is arranged on the second inclined surface; the end face of the first anti-loose gasket 5 facing the second anti-loose gasket 6 and the end face of the second anti-loose gasket 6 facing the first anti-loose gasket 5 can be both second inclined faces, and the sum of the inclination angles of the two second inclined faces is selected within the range of 2.6-3.9 degrees, so that the thicknesses of the left side and the right side of the first anti-loose gasket 5 and the second anti-loose gasket 6 are not equal, and the fourth spline 53 and the fifth spline 61 are respectively arranged on the second inclined faces corresponding to the fourth spline 53 and the fifth spline 61.
It is right below the utility model discloses a two kinds of locking fastener's of bolt nut, bolt gasket locking effect test:
the utility model discloses a test is carried out to two kinds of locking fastener entrusts SGS standard technical service Limited Suzhou branch company, specifically be, get a plurality of locking fastener A and a plurality of locking fastener B that constitute by bolt 4, first check washer 5 and second check washer 6 of constituteing by bolt 1, fastening nut 2 and locknut 3, wherein the material of bolt 1, fastening nut 2, locknut 3, bolt 4 and second check washer 6 is conventional bolt and nut 'S common material, for example stainless steel or ordinary steel, the material of first check washer 5 is manganese steel or spring steel, then fix two work pieces mutually with above-mentioned locking fastener A and locking fastener B, and install the work piece after fixing on the mechanical vibration platform that the model is ES-50L S3-445-L T1010, the environmental condition in laboratory is 15 ~ 35 ℃, the air humidity is 25 ~ 75% RH. simulation high-speed railway vibration condition in the operation environment and exerts the vibration parameter to locking fastener A, fastener B' S axial and radial respectively for the vibration parameter:
the test direction is as follows: axial and radial (X/Y/Z axis) of the bolt
And (3) testing time: 5 hours/axis for 15 hours.
Frequency (Hz) and amplitude (mm) of the mechanical vibration table:
the test results are: the appearance of the anti-loose fastener A and the anti-loose fastener B has no visible mechanical damage and is not loosened.
The protection scope of the present invention includes but is not limited to the above embodiments, the protection scope of the present invention is subject to the claims, and any replacement, deformation, and improvement that can be easily conceived by those skilled in the art made by the present technology all fall into the protection scope of the present invention.
Claims (10)
1. The utility model provides a locking fastener, includes bolt, fastening nut and locknut, its characterized in that: at least one of two opposite end faces of the fastening nut and the locknut is a first inclined plane, so that the thicknesses of the left side and the right side of the fastening nut or the locknut are not equal, a first spline tooth is arranged on one end face of the fastening nut, which faces the locknut, a second spline tooth is arranged on one end face of the locknut, which faces the fastening nut, the rotation direction of the second spline tooth is the same as that of the first spline tooth and is meshed with the first spline tooth, and parts, located in the locknut and outside the bolt, are slightly bent.
2. A check fastener as defined in claim 1, wherein: the end face of one end, facing the locknut, of the fastening nut is a first inclined plane, and the first spline teeth are arranged on the first inclined plane; or the end surface of one end of the locknut, which faces the fastening nut, is a first inclined surface, the second spline is arranged on the first inclined surface, and the inclination angle of the first inclined surface is 2.6-3.9 degrees.
3. A check fastener as defined in claim 1, wherein: the end face of the fastening nut, which faces the locknut, and the end face of the locknut, which faces the fastening nut, are both first inclined planes, the sum of the inclination angles of the two first inclined planes is 2.6-3.9 degrees, and the first spline teeth and the second spline teeth are respectively arranged on the corresponding first inclined planes.
4. A check fastener as defined in claim 1, wherein: the rotation directions of the first spline teeth and the second spline teeth are both clockwise.
5. A check fastener as defined in claim 1, wherein: the anti-loose nut is a flange nut, and the second spline is arranged on one end face, facing the fastening nut, of the flange nut.
6. A kind of anti-loose fastener, characterized by including the bolt, first anti-loose shim and second anti-loose shim, the said first anti-loose shim is the hexagon shape, there are third teeth on the end surface of the said first anti-loose shim towards the work piece, when the anti-loose fastener is used for fixing the work piece, the said third teeth bite into the work piece, at least one of two opposite end surfaces of said first anti-loose shim and said second anti-loose shim is the second inclined plane, make the thickness of the left, right both sides of said first anti-loose shim or said second anti-loose shim unequal, the said first anti-loose shim is equipped with the fourth teeth on the end surface towards said second anti-loose shim, said second anti-loose shim towards said first anti-loose shim on be equipped with the fifth teeth, the direction of rotation of the said fifth teeth is the same as and is engaged with the direction of rotation of the said fourth teeth, and the part of the bolt between the second anti-loosening gasket and the bolt head is slightly bent, the second anti-loosening gasket is provided with a hexagon socket, and the bolt head of the bolt is embedded into the hexagon socket and matched with the hexagon socket.
7. An anti-loose fastener as defined in claim 6, wherein: the first anti-loosening gasket is made of manganese steel or spring steel.
8. An anti-loose fastener as defined in claim 6, wherein: the end surface of the first anti-loosening gasket, which faces the second anti-loosening gasket, is a second inclined surface, and the fourth spline is arranged on the second inclined surface; or the end surface of the second anti-loosening gasket facing the first anti-loosening gasket is a second inclined surface, the fifth spline is arranged on the second inclined surface, and the inclination angle of the second inclined surface is 2.6-3.9 degrees.
9. An anti-loose fastener as defined in claim 6, wherein: the end faces of the first anti-loosening gasket facing the second anti-loosening gasket and the end faces of the second anti-loosening gasket facing the first anti-loosening gasket are both second inclined planes, the sum of the inclination angles of the two second inclined planes is 2.6-3.9 degrees, and the fourth spline teeth and the fifth spline teeth are respectively arranged on the second inclined planes corresponding to the fourth spline teeth and the fifth spline teeth.
10. An anti-loose fastener as defined in claim 6, wherein: the rotation directions of the third spline tooth, the fourth spline tooth and the fifth spline tooth are all clockwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921884849.4U CN211039353U (en) | 2019-11-04 | 2019-11-04 | Anti-loosening fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921884849.4U CN211039353U (en) | 2019-11-04 | 2019-11-04 | Anti-loosening fastener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211039353U true CN211039353U (en) | 2020-07-17 |
Family
ID=71534865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921884849.4U Expired - Fee Related CN211039353U (en) | 2019-11-04 | 2019-11-04 | Anti-loosening fastener |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211039353U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734728A (en) * | 2020-07-23 | 2020-10-02 | 冯鲁民 | Anti-loosening nut with double anti-loosening and pretightening force estimation functions |
-
2019
- 2019-11-04 CN CN201921884849.4U patent/CN211039353U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734728A (en) * | 2020-07-23 | 2020-10-02 | 冯鲁民 | Anti-loosening nut with double anti-loosening and pretightening force estimation functions |
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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: 20200717 Termination date: 20211104 |
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| CF01 | Termination of patent right due to non-payment of annual fee |