CN111173830A - Composite locknut - Google Patents
Composite locknut Download PDFInfo
- Publication number
- CN111173830A CN111173830A CN202010127627.9A CN202010127627A CN111173830A CN 111173830 A CN111173830 A CN 111173830A CN 202010127627 A CN202010127627 A CN 202010127627A CN 111173830 A CN111173830 A CN 111173830A
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- Prior art keywords
- sleeve
- groove
- spring
- taper
- nut
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 230000000694 effects Effects 0.000 abstract description 8
- 238000005299 abrasion Methods 0.000 abstract description 4
- 230000002045 lasting effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/36—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt with conical locking parts, which may be split, including use of separate rings co-operating therewith
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
- F16B39/26—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object with spring washers fastened to the nut or bolt-head
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
Abstract
The invention discloses a composite locknut which comprises a taper nut, a taper sleeve and a spring structure; the taper nut comprises a rotary sleeve, a connecting sleeve and an inner taper sleeve which are sequentially connected, the outer surface of the inner taper sleeve is a conical surface, and a plurality of through grooves extending along the axial direction of the inner taper sleeve are formed in the inner taper sleeve; the tapered sleeve is internally provided with a tapered groove and a spring groove which are communicated, the tapered groove is matched with the inner tapered sleeve, and the spring groove is internally provided with a plurality of spring structures. According to the composite type anti-loose nut provided by the invention, the wedge-shaped force-increasing structure with the through groove and the spring structure are combined, the axial pre-tightening force is unchanged, and the radial pre-tightening force is multiplied, so that the actual contact area between the nut and the bolt is obviously increased due to the wedge-shaped structure with the through groove, the overlarge local abrasion and damage between the locking surfaces during disassembly are avoided, the composite type anti-loose nut can be repeatedly used for many times, the constant and lasting pre-tightening force can be provided by the spring structure, and the anti-loose effect is better in.
Description
Technical Field
The invention belongs to the technical field of nuts, and particularly relates to a composite locknut.
Background
The screw connection has been widely used in the industries of automobiles, machine tools, aerospace, railways and the like because of the advantages of compact structure, easy assembly and disassembly, large connecting force, reusability and the like. The traditional threaded connection meets the self-locking condition under the conditions of static load action and small temperature change, the unscrewing torque between threads is smaller than the self-locking torque, the connection system is in a balanced state, effective locking can be realized, and generally, an additional anti-loosening method is not required to be introduced to prevent loosening. However, when the structure is subjected to impact and vibration, particularly to dynamic load in a transverse circulation mode, the pretightening force of the threaded connection is easy to gradually reduce, and finally, the problems of connection failure in the modes of loosening, disengaging, dropping and the like are caused. In safety and critical applications, such failures can be catastrophic.
In general, the durability of a mechanical structure is proportional to the number of bolted connections, and with the development of modern manufacturing industry, the problem of avoiding loosening of a threaded connection structure during operation has become one of the core problems of the design of the threaded connection structure at present. Therefore, it is critical to design and use a secure and reliable threaded coupling anti-loosening method. Although there are many methods for preventing loosening of threaded fasteners, there are four general methods: the first is friction anti-loosening, which mainly depends on increasing friction force; the second is mechanical anti-loosening, which is to use a pin, a gasket and a steel wire to clamp a nut; the third is rivet punching anti-loosing, mainly to rivet and weld the thread pair; the fourth is the structure anti-loose, such as Hard Lock locknut, Down's screw anti-loose, ST2 type locknut, SLB screw anti-loose, etc.
The first type of friction locking is the most widely used locking method, which generates a positive pressure between the thread pairs that is not changed by an external force, thereby obtaining a friction force that can prevent the thread pairs from rotating relative to each other. This friction 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 bolt can cause the pretightening force to be reduced due to loosening, the lost pretightening force is slowly increased along with the increase of the vibration times, the nut can be finally loosened and the thread coupling can be failed, and the increase of the friction force by increasing the positive pressure between the thread pairs is limited.
The second way is to use a stop to directly limit the relative rotation of the thread pairs. Such as the use of cotter pins, tandem wires, and stop washers. This kind of mode causes the dismantlement inconvenient, and its locking mode does not have the pretightning force moreover, when the bolt pine moves back to locking position, locking mode could take place the effect promptly. Thus, this approach is not anti-loosening in nature, but rather anti-drop.
The third mode is riveting and anti-loosening, which adopts the methods of punching, welding, bonding and the like after screwing, so that the screw pair loses the characteristics of the 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 application range is very limited.
The most classical anti-loose structure in the fourth structure is a Japanese Hard Lock anti-loose nut, which is improved by combining the anti-loose principle of a double nut and a convex-concave nut. The upper nut is a concave nut, the lower nut is a convex nut, the center slightly shifts during processing, eccentric processing is achieved, the effect of driving a wedge into a gap is achieved, loosening of threads is prevented, different corresponding eccentric amounts exist for different sizes and materials, manufacturing and production are troublesome, and efficiency is low.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a composite type locknut which is simple in structure, combines a wedge-shaped force-increasing structure with a through groove with a spring structure, ensures that the axial pretightening force is unchanged and the radial pretightening force is multiplied, ensures that the actual contact area of the nut and a bolt is obviously increased by the wedge-shaped structure with the through groove, avoids overlarge local abrasion and damage between locking surfaces during disassembly, can be repeatedly used for many times, can provide constant and lasting pretightening force by the spring structure, and has better locknut effect in occasions with large vibration and temperature change.
The invention provides the following technical scheme:
a composite locknut comprises a taper nut, a taper sleeve and a spring structure;
the taper nut comprises a rotary sleeve, a connecting sleeve and an inner taper sleeve which are sequentially connected, the outer surface of the inner taper sleeve is a conical surface, and a plurality of through grooves extending along the axial direction of the inner taper sleeve are formed in the inner taper sleeve;
the tapered sleeve is internally provided with a tapered groove and a spring groove which are communicated, the tapered groove is matched with the inner tapered sleeve, and the spring groove is internally provided with a plurality of spring structures.
Preferably, the inner surfaces of the rotary sleeve, the connecting sleeve and the inner taper sleeve are provided with internal threads matched with the external threads of the bolt rod.
Preferably, the outer surface of the rotating sleeve is hexagonal.
Preferably, the outer surface of the connecting sleeve is an arc surface.
Preferably, the through grooves are uniformly distributed along the circumferential direction of the inner taper sleeve.
Preferably, the upper surface of the spring groove protrudes out of the conical surface groove and forms an annular limiting table, and the inner diameter of the limiting table is smaller than the outer diameter of the inner taper sleeve.
Preferably, the spring structure is a disc spring, and the outer diameter of the disc spring is smaller than the inner diameter of the end face of the spring groove.
Preferably, the taper angles of the outer surface of the inner taper sleeve and the inner surface of the tapered groove are both 3 to 15 °.
Compared with the prior art, the invention has the beneficial effects that:
(1) the inner taper sleeve of the taper nut is matched with the taper groove of the taper sleeve, and the matching surface is a taper surface, so that a wedge-shaped force-increasing structure is formed, under the condition that the axial pretightening force is kept unchanged, the radial pretightening force of a thread is increased in multiples, the radial gap causing impact load and fatigue damage is eliminated, the radial contact area of a bolt and the nut is also obviously increased, and the connection force of the thread is increased;
(2) the inner taper sleeve of the taper nut is provided with a plurality of through grooves extending along the axial direction of the inner taper sleeve, so that the inner taper sleeve can deform along the radial direction within a certain range, and the attaching area of the inner taper sleeve and a bolt is increased, thereby increasing the threaded connection force, having the anti-loosening effect, avoiding overlarge local abrasion and damage between locking surfaces during disassembly, and being reusable for many times;
(3) the spring grooves of the taper sleeve are internally provided with the plurality of spring structures, when the taper sleeve is used, the lower end surfaces of the spring structures are contacted with the upper end surface of a fastening object, when the taper nut is screwed, the spring structures can always keep the radial pre-tightening force and the axial pre-tightening force of the threads, so that the pre-tightening of the threads is not influenced by adverse factors such as vibration, expansion with heat and contraction with cold, the anti-loosening effect is realized, and the connection failure of the nut and the bolt is prevented;
(4) the composite locknut provided by the invention has the advantages of small number of components, simple structure, convenience in manufacturing, low cost and convenience in production and application.
Drawings
FIG. 1 is a schematic structural view of a composite locknut;
FIG. 2 is a schematic structural view of a taper nut;
FIG. 3 is an axial cross-sectional view of the taper nut;
FIG. 4 is an axial cross-sectional view of the taper sleeve;
FIG. 5 is a cross-sectional axial view of the composite locknut;
fig. 6 is a sectional view of the composite locknut;
labeled as: 1. a taper nut; 1-1, rotating sleeve; 1-2, inner taper sleeve; 1-3, connecting sleeves; 1-4, through grooves; 1-5, internal threads; 2. a taper sleeve; 2-1, a conical groove; 2-2, spring grooves; 2-3, a limit table; 2-4, end faces of the spring grooves; 3. a bolt; 3-1, bolt bar; 3-2, bolt head; 4. a spring structure; 5. and (5) fastening the object.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
It should be noted that in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1-6, a composite locknut comprises a taper nut 1, a taper sleeve 2 and a spring structure 4; the taper nut 1 comprises a rotary sleeve 1-1, a connecting sleeve 1-3 and an inner taper sleeve 1-2 which are connected in sequence, the outer surface of the inner taper sleeve 1-2 is a conical surface, and a plurality of through grooves 1-4 extending along the axial direction of the inner taper sleeve 1-2 are arranged on the inner taper sleeve 1-2; the tapered sleeve 2 is internally provided with a tapered groove 2-1 and a spring groove 2-2 which are communicated, the tapered groove 2-1 is matched with the inner tapered sleeve 1-2, and a plurality of spring structures 4 are arranged in the spring groove 2-2.
As shown in figures 2 and 3, the inner surfaces of the rotary sleeve 1-1, the connecting sleeve 1-3 and the inner taper sleeve 1-2 are provided with inner threads 1-5 matched with the outer threads of the bolt rod 3-1. The outer surface of the rotating sleeve 1-1 is a hexagonal surface, so that external force application is facilitated to rotate. The outer surface of the connecting sleeve 1-3 is a cambered surface, so that stress concentration is avoided, collision damage in the installation process is also prevented, and the service life is prolonged. The through grooves 1-4 are uniformly distributed along the circumferential direction of the inner taper sleeve 1-2, so that the inner taper sleeve 1-2 is uniformly deformed along the radial direction in a certain range, and the attaching area of the inner taper sleeve 1-2 and the bolt rod 3-1 is increased.
As shown in figure 4, the upper surface of the spring groove 2-2 protrudes out of the conical surface groove 2-1 and forms an annular limiting table 2-3, the inner diameter of the limiting table 2-3 is smaller than the outer diameter of the inner taper sleeve 1-2, and the lower end surface of the inner taper sleeve 1-2 is clamped on the upper end surface of the limiting table 2-3 during installation. The spring structure 4 is a disc spring, and the outer diameter of the disc spring is smaller than the inner diameter of 2-4 parts of the end face of the spring groove, so that the disc spring is convenient to mount.
As shown in FIG. 5, the taper angles of the outer surface of the inner taper sleeve 1-2 and the inner surface of the tapered groove 2-1 are each 3-15 deg..
As shown in fig. 5 and 6, during installation, a bolt rod 3-1 of a bolt 3 sequentially passes through a fastening object 5, a spring structure 4, a taper sleeve 2 and a taper nut 1, so that the upper end surface of the bolt head 3-2 is in contact with the lower end surface of the fastening object 5, the spring structure 4 is clamped in a spring groove 2-2 of the taper sleeve 2, the lower end surface of the spring structure 4 is in contact with the upper end surface of the fastening object 5, the upper end surface of the spring structure 4 is in contact with the upper surface of the spring groove 2-2, and an inner taper sleeve 1-2 of the taper nut 1 is clamped in a taper groove 2-1 of the taper sleeve 2.
As shown in fig. 5 and 6, in the working state, the rotating sleeve 1-1 of the taper nut 1 is rotated, and the taper nut 1 moves downwards, so that the outer surface of the inner taper sleeve 1-2 is contacted with the inner surface of the taper groove 2-1; and continuing to rotate the rotating sleeve 1-1 of the taper nut 1, driving the taper sleeve 2 to move downwards by the taper nut 1 until the bottom of the end face of the spring groove 2-2 is contacted with the upper end face of the fastening object 5, and applying a locking force distance to meet the standard requirement during rotation. At the moment, the inner taper sleeve 1-2 of the taper nut 1 is subjected to the axial force given by the locking moment and the elastic force of the spring structure 4 and also subjected to the inclined plane reaction force (which can be decomposed into the axial force and the radial force) given by the taper sleeve 2, wherein the radial force is a plurality of times of the axial force, so that the internal thread of the taper nut 1 is tightly attached to the external thread on the bolt rod 3; meanwhile, the inner taper sleeve 1-2 deforms along the radial direction in a certain range in the installation process, and the attaching area of the inner taper sleeve 1-2 and the bolt rod 3-1 is increased, so that the threaded connection force is increased, and the anti-loose locking effect is achieved.
The composite type locknut provided by the invention adopts the principle of an expansion screw, combines a wedge-shaped force-increasing structure with a through groove and a spring structure, and has the advantages that the axial pretightening force is unchanged and the radial pretightening force is multiplied. Different from other traditional structures, due to the existence of the through groove, the front end of the inner taper sleeve in a cantilever state is easy to generate overall deformation under the action of radial pretightening force, and meanwhile, the internal thread is matched with the external thread of the bolt rod (the thread shape and the thread pitch are completely consistent), so that the axial gap and the radial gap between the nut and the bolt are effectively eliminated (the radial gap is the main reason for generating thread loosening), the actual contact area between the nut and the bolt is obviously increased, the reliability of thread locking is improved, overlarge local abrasion and damage between locking surfaces during disassembly can be avoided, and the locking force can be continuously used without obvious change after 30 times of disassembly; the spring structure can provide constant and lasting pretightening force, and the anti-loosening effect is better on occasions with large vibration and temperature change.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A composite locknut is characterized by comprising a taper nut, a taper sleeve and a spring structure;
the taper nut comprises a rotary sleeve, a connecting sleeve and an inner taper sleeve which are sequentially connected, the outer surface of the inner taper sleeve is a conical surface, and a plurality of through grooves extending along the axial direction of the inner taper sleeve are formed in the inner taper sleeve;
the tapered sleeve is internally provided with a tapered groove and a spring groove which are communicated, the tapered groove is matched with the inner tapered sleeve, and the spring groove is internally provided with a plurality of spring structures.
2. The composite type locknut of claim 1, wherein the inner surfaces of the rotary sleeve, the connecting sleeve and the inner taper sleeve are provided with internal threads matching with the external threads of the bolt shank.
3. The composite locknut of claim 2 wherein the outer surface of the swivel sleeve is hexagonal.
4. The composite type locknut of claim 2, wherein the outer surface of the connecting sleeve is a cambered surface.
5. The composite type locknut of claim 2, wherein the through slots are evenly distributed along the circumferential direction of the inner taper sleeve.
6. The composite type locknut of claim 1, wherein the upper surface of the spring groove protrudes from the conical surface groove and forms an annular limiting table, and the inner diameter of the limiting table is smaller than the outer diameter of the inner taper sleeve.
7. The composite locknut of claim 1 wherein the spring structure is a belleville spring having an outer diameter less than an inner diameter of the end face of the spring groove.
8. The composite type locknut of claim 1, wherein the taper angles of the inner taper sleeve outer surface and the tapered groove inner surface are both 3-15 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010127627.9A CN111173830A (en) | 2020-02-28 | 2020-02-28 | Composite locknut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010127627.9A CN111173830A (en) | 2020-02-28 | 2020-02-28 | Composite locknut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111173830A true CN111173830A (en) | 2020-05-19 |
Family
ID=70626019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010127627.9A Pending CN111173830A (en) | 2020-02-28 | 2020-02-28 | Composite locknut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111173830A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943776A (en) * | 2021-03-10 | 2021-06-11 | 扬州工业职业技术学院 | High-strength special nut with constant friction coefficient |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR765730A (en) * | 1933-12-18 | 1934-06-14 | System of nut, lock nut and spring washer indissoluble | |
| GB858138A (en) * | 1958-02-19 | 1961-01-04 | Martin Littman | Nuts |
| GB872733A (en) * | 1956-11-23 | 1961-07-12 | Friedrich Doerr | Improvements in or relating to lock-nuts |
| US4068697A (en) * | 1975-09-02 | 1978-01-17 | Ubaldo Schiaffino | Self-locking screw nut |
| JPH07151129A (en) * | 1993-11-29 | 1995-06-13 | Furukawa Electric Co Ltd:The | Nut and loosening stopping screw fastening fitting |
| CN102829062A (en) * | 2012-09-07 | 2012-12-19 | 力帆实业(集团)股份有限公司 | Bolt locking and looseness-preventing device |
| CN203809477U (en) * | 2014-03-05 | 2014-09-03 | 浙江赛日机电科技有限公司 | Eccentric loose preventing nut |
| KR20150010484A (en) * | 2013-07-19 | 2015-01-28 | 임채우 | Nut for looseness prevention |
| CN104405752A (en) * | 2014-11-26 | 2015-03-11 | 北京京诚之星科技开发有限公司 | Locknut |
| CN109185321A (en) * | 2018-11-20 | 2019-01-11 | 韦志锋 | A kind of pairs of anti-loose nut bolt group and its operating method with elastic bumps nut and annular groove nut composition |
| CN209925403U (en) * | 2019-04-03 | 2020-01-10 | 伍国强 | Column sleeve locknut, taper sleeve locknut and bolt combined locknut |
| CN211820332U (en) * | 2020-02-28 | 2020-10-30 | 扬州工业职业技术学院 | Composite locknut |
-
2020
- 2020-02-28 CN CN202010127627.9A patent/CN111173830A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR765730A (en) * | 1933-12-18 | 1934-06-14 | System of nut, lock nut and spring washer indissoluble | |
| GB872733A (en) * | 1956-11-23 | 1961-07-12 | Friedrich Doerr | Improvements in or relating to lock-nuts |
| GB858138A (en) * | 1958-02-19 | 1961-01-04 | Martin Littman | Nuts |
| US4068697A (en) * | 1975-09-02 | 1978-01-17 | Ubaldo Schiaffino | Self-locking screw nut |
| JPH07151129A (en) * | 1993-11-29 | 1995-06-13 | Furukawa Electric Co Ltd:The | Nut and loosening stopping screw fastening fitting |
| CN102829062A (en) * | 2012-09-07 | 2012-12-19 | 力帆实业(集团)股份有限公司 | Bolt locking and looseness-preventing device |
| KR20150010484A (en) * | 2013-07-19 | 2015-01-28 | 임채우 | Nut for looseness prevention |
| CN203809477U (en) * | 2014-03-05 | 2014-09-03 | 浙江赛日机电科技有限公司 | Eccentric loose preventing nut |
| CN104405752A (en) * | 2014-11-26 | 2015-03-11 | 北京京诚之星科技开发有限公司 | Locknut |
| CN109185321A (en) * | 2018-11-20 | 2019-01-11 | 韦志锋 | A kind of pairs of anti-loose nut bolt group and its operating method with elastic bumps nut and annular groove nut composition |
| CN209925403U (en) * | 2019-04-03 | 2020-01-10 | 伍国强 | Column sleeve locknut, taper sleeve locknut and bolt combined locknut |
| CN211820332U (en) * | 2020-02-28 | 2020-10-30 | 扬州工业职业技术学院 | Composite locknut |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943776A (en) * | 2021-03-10 | 2021-06-11 | 扬州工业职业技术学院 | High-strength special nut with constant friction coefficient |
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