CN112555266A - Anti-loose bolt group consisting of nut with elastic bulge and gasket with spiral lifting groove - Google Patents
Anti-loose bolt group consisting of nut with elastic bulge and gasket with spiral lifting groove Download PDFInfo
- Publication number
- CN112555266A CN112555266A CN202011274242.1A CN202011274242A CN112555266A CN 112555266 A CN112555266 A CN 112555266A CN 202011274242 A CN202011274242 A CN 202011274242A CN 112555266 A CN112555266 A CN 112555266A
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- Prior art keywords
- nut
- gasket
- groove
- elastic bulge
- spiral lifting
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- 230000000630 rising effect Effects 0.000 claims description 5
- 239000013013 elastic material Substances 0.000 claims description 3
- 230000033001 locomotion Effects 0.000 abstract description 7
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000002265 prevention Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000035939 shock Effects 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
- F16B39/282—Locking by means of special shape of work-engaging surfaces, e.g. notched or toothed nuts
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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
- F16B39/24—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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints With Pressure Members (AREA)
- Gasket Seals (AREA)
Abstract
A check bolt group consisting of a nut with an elastic bulge and a gasket with a spiral lifting groove realizes that the nut is screwed with two different threads simultaneously after the nut with the elastic bulge and the gasket with the spiral lifting groove are pre-tightened. Because the lead angle and the thread pitch of the two threads are different, when the nut is to generate relative rotation, the axial displacement of the two threads is different, the two threads interfere with each other and are restricted with each other in the same corner, so that the relative rotation of the nut cannot be generated, the relative rotation of a thread pair is avoided, and the purpose of preventing looseness by utilizing structural motion interference is achieved. The structure movement interference anti-loosening is more reliable than the friction anti-loosening, the operation is more convenient than the mechanical anti-loosening, the anti-loosening device still belongs to detachable threaded connection, and the use is very convenient. The device has good reliability and practicability, can be used in severe impact, vibration, alternating load or occasions with large temperature change, effectively reduces the maintenance and overhaul of threaded connection, and improves the safety and utilization rate of equipment utilization.
Description
Technical Field
The invention belongs to the field of looseness prevention of mechanical engineering threaded connection, and relates to an looseness prevention bolt group consisting of a nut with an elastic bulge and a gasket with a spiral lifting groove, which can fully utilize structural movement interference, prevent the threaded connection from loosening, improve the connection effect and reduce the maintenance and overhaul of the threaded connection.
Background
The various machines and components are not detachable from the coupling during the assembly of the connection. The number of the connecting pieces is about 60 percent of the total number of mechanical parts, wherein the thread connection is the most common form used in the mechanical connection, has the advantages of simple structure, reliable connection, convenient assembly and disassembly and the like, and brings convenience to the mechanical industry. However, it has an inevitable weakness, and under the effect of severe impact, shock or variable load, or when the temperature change is large, the threaded coupling may loosen or even become completely disengaged. In real life, the cases of product failure, machine failure and disassembly caused by loose screw thread connection and even machine damage and human death are frequently rare. Therefore, how to ensure the reliability of the threaded connection and prevent the threaded connection from loosening is an important aspect of effectively ensuring the product quality and improving the product reliability, and the problem of thread looseness prevention becomes an actual technical problem which needs to be solved urgently.
To solve the problem of loosening of the coupling, starting with the birth of threaded couplings, a great deal of experimentation and research has been conducted by scientists and engineers in many countries of the world.
The methods for preventing looseness are various, and according to different working principles, the methods for preventing looseness are divided into friction looseness prevention, mechanical looseness prevention and the like. In addition, special methods such as rivet welding, spot-locking, adhesive-locking between thread pairs, etc., are known and are used for non-detachable connections.
Friction locking is the most widely used locking method, which generates a positive pressure between the thread pairs that does not change with external force, so as to generate a friction force that can prevent the thread pairs from rotating relatively. 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 locknut 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, and is gradually reduced along with the increase of the vibration times, so that the nut is loosened and the threaded connection fails.
The second way is mechanical anti-loosening. The relative rotation of the thread pair is directly limited by a member. Such as using cotter pins, tandem wires and washers, etc. This way the disassembly is inconvenient.
Disclosure of Invention
The fundamental problem with bolting anti-loosening is to prevent relative rotation of the thread pairs. The thread form, major diameter, pitch, number of threads and direction of rotation of the thread are called five elements of the thread, and only the internal thread and the external thread which are the same as the five elements can be mutually screwed. If the nut threads are screwed with the two threads respectively after being pre-tightened, the lead angles of the two threads are different, one thread is a normal connecting thread, and the lead angle of the other thread is far larger than that of the normal thread; the pitch is also unequal and the pitch of a thread with a large lead angle is much larger than the pitch of a normal thread. Therefore, when the nut is to generate relative rotation, the axial displacement of the two threads is unequal and mutually interfered and restricted in the same corner, so that the relative rotation cannot be generated, the relative rotation of the thread pair is avoided, and the anti-loosening purpose is realized.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a take locking bolt group that elasticity protruding nut and the gasket of taking spiral groove of rising constitute, characterized by: comprises a nut with an elastic bulge, a gasket with a spiral lifting groove and a bolt; the elastic bulge of the nut with the elastic bulge is in a spherical crown shape, a spherical crown columnar shape or a cylindrical shape, is made of elastic materials, is positioned on one end face of the nut, is upright and is vertical to the end face of the nut; the outer corridor of the gasket with the spiral lifting groove is hexagonal and has the same size as the nut, and the inner cavity of the gasket is a round hole with the diameter larger than that of the screw rod; one end of the end surface of the gasket is a flat surface, and a spiral groove is formed on the wall thickness central line from the inner cavity of the other end surface to the surface of the outer gallery; the axial section of the groove is the same as the section of the protrusion on the end surface of the nut, the depth of the groove end is the same as the height of the protrusion, and the groove bottom spirally rises in an anticlockwise direction by taking alpha as a rising angle; the lead angle and the thread pitch of the spiral lead groove are at least more than 2 times of the connection internal thread of the nut; the elastic bulge of the nut and the gasket spiral lifting groove are positioned on a radius arc with the same center of circle; when the elastic bulge of the nut is buckled into the groove deep end of the gasket spiral lifting groove, six surfaces of the nut are required to be correspondingly superposed with the hexagonal vertical surfaces of the gasket outer gallery one by one.
The nut with the elastic bulge and the gasket with the spiral lifting groove are pre-tightened, so that the nut can be simultaneously screwed with two different threads. Because the lead angle and the thread pitch of the two threads are different, when the nut is to generate relative rotation, the axial displacement of the two threads is different, the two threads interfere with each other and are restricted with each other in the same corner, so that the relative rotation of the nut cannot be generated, the relative rotation of a thread pair is avoided, and the purpose of preventing looseness by utilizing structural motion interference is achieved. The structure movement interference anti-loosening is more reliable than the friction anti-loosening, the operation is more convenient than the mechanical anti-loosening, the anti-loosening device still belongs to detachable threaded connection, and the use is very convenient. The device has good reliability and practicability, can be used in severe impact, vibration, alternating load or occasions with large temperature change, effectively reduces the maintenance and overhaul of threaded connection, and improves the safety and utilization rate of equipment utilization.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic axial cross-sectional view of the coupling assembly of the present invention.
Fig. 2 is an axial sectional view of the elastic lug nut.
FIG. 3 is a front elevational view of the raised end of the resilient raised nut.
Fig. 4 is a perspective view of a gasket with a spiral groove.
Fig. 5 is a partial cross-sectional schematic view of the coupling assembly of the present invention.
In the figure: 1. gasket 2 with spiral lifting groove 3, nut with elastic bulge
4. Bolt 5, vertical elastic bulge 6, round washer
7. Joined workpiece 18 joined workpiece 2.
Detailed Description
In the embodiment of fig. 1, a check bolt group composed of a nut (3) with an elastic protrusion and a gasket (1) with a spiral groove comprises the gasket (1) with the spiral groove, the nut (3) with the elastic protrusion and a bolt (4). The upright elastic bulge (5) with the elastic bulge nut (3) is arc-shaped, is made of elastic materials, is positioned on one end face of the bulge nut (3), is upright and is vertical to the end face of the bulge nut (3). One end of the end surface of the gasket (1) with the spiral lifting groove is a flat surface, and a spiral groove (2) is formed on the wall thickness centerline from the inner cavity of the other end surface to the surface of the outer gallery; the axial section of the groove is the same as the section of the protrusion (5) on the end surface of the nut, the depth of the groove end is the same as the height of the protrusion, and the groove bottom spirally rises in the counterclockwise direction by taking alpha as a rising angle. The alpha lead angle and the thread pitch of the spiral lead groove are at least more than 2 times of the internal thread of the nut. The elastic bulge (5) of the nut and the gasket spiral lifting groove (2) are positioned on the same circle center radius arc; when the elastic bulge (5) of the nut is buckled into the groove deep end of the gasket spiral lifting groove (2), six surfaces of the nut (3) are required to be correspondingly superposed with the hexagonal vertical surfaces of the outer gallery of the gasket (1) one by one.
When the screw is used, the elastic bulge (5) of the bulge nut (3) is opposite to the groove surface end of the gasket (1) with the spiral lifting groove, the elastic bulge (5) is buckled into the deep groove end of the spiral lifting groove (2) of the gasket, and the elastic bulge and the gasket are screwed into the screw (4) together. As the nut (3) and the gasket (1) have the same shape and size, the planes of the outer galleries are overlapped. When the wrench is screwed, the wrench tooth mouth can simultaneously bite the nut (3) and the gasket (1), and the wrench tooth mouth rotates clockwise. The nut (3) rotates continuously, the elastic bulge (5) drives the gasket (1) to move downwards gradually, so that the flat end face of the gasket is contacted with the supporting surface of the workpiece, and the gasket (1) is screwed by the nut (3) until reaching the specified maximum pretightening force.
When in work, the spiral lifting grooves (2) of the gasket (1) and the elastic bulges (5) are a thread lifting surface because of mutual independence. When the nut (3) is to generate relative rotation, in the same corner, the nut has unequal axial displacements between the internal thread and the spiral lifting groove, and the mutual interference and restriction are realized, so that the relative rotation can not be generated, thereby avoiding the relative rotation of the thread pair and realizing the purpose of preventing looseness by utilizing the structural motion interference.
When the nut (3) is dismounted, as long as the nut (3) and the gasket (1) rotate together, no relative movement exists between the nut (3) and the gasket, no interference is generated, and the unscrewing operation of the nut (3) is not influenced. When the elastic bulge (5) of the nut (3) is screwed out of the spiral lifting groove (2), the nut (3) can be screwed out independently.
Claims (1)
1. The utility model provides a take locking bolt group that elasticity protruding nut and the gasket of taking spiral groove of rising constitute, characterized by: comprises a nut with an elastic bulge, a gasket with a spiral lifting groove and a bolt; the elastic bulge of the nut with the elastic bulge is in a spherical crown shape, a spherical crown columnar shape or a cylindrical shape, is made of elastic materials, is positioned on one end face of the nut, is upright and is vertical to the end face of the nut; the outer corridor of the gasket with the spiral lifting groove is hexagonal and has the same size as the nut, and the inner cavity of the gasket is a round hole with the diameter larger than that of the screw rod; one end of the end surface of the gasket is a flat surface, and a spiral groove is formed on the wall thickness central line from the inner cavity of the other end surface to the surface of the outer gallery; the axial section of the groove is the same as the section of the protrusion on the end surface of the nut, the depth of the groove end is the same as the height of the protrusion, and the groove bottom spirally rises in an anticlockwise direction by taking alpha as a rising angle; the lead angle and the thread pitch of the spiral lead groove are at least more than 2 times of the connection internal thread of the nut; the elastic bulge of the nut and the gasket spiral lifting groove are positioned on a radius arc with the same center of circle; when the elastic bulge of the nut is buckled into the groove deep end of the gasket spiral lifting groove, six surfaces of the nut are required to be correspondingly superposed with the hexagonal vertical surfaces of the gasket outer gallery one by one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011274242.1A CN112555266A (en) | 2020-11-15 | 2020-11-15 | Anti-loose bolt group consisting of nut with elastic bulge and gasket with spiral lifting groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011274242.1A CN112555266A (en) | 2020-11-15 | 2020-11-15 | Anti-loose bolt group consisting of nut with elastic bulge and gasket with spiral lifting groove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112555266A true CN112555266A (en) | 2021-03-26 |
Family
ID=75042347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011274242.1A Pending CN112555266A (en) | 2020-11-15 | 2020-11-15 | Anti-loose bolt group consisting of nut with elastic bulge and gasket with spiral lifting groove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112555266A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113229865A (en) * | 2021-04-21 | 2021-08-10 | 启晨(上海)医疗器械有限公司 | Conveying device for atrium shunt |
| CN113309778A (en) * | 2021-05-26 | 2021-08-27 | 西安理工大学 | Locking device that locking and mechanical locking of nut prestressing force combined together |
-
2020
- 2020-11-15 CN CN202011274242.1A patent/CN112555266A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113229865A (en) * | 2021-04-21 | 2021-08-10 | 启晨(上海)医疗器械有限公司 | Conveying device for atrium shunt |
| CN113309778A (en) * | 2021-05-26 | 2021-08-27 | 西安理工大学 | Locking device that locking and mechanical locking of nut prestressing force combined together |
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