CN214661426U - Check bolt group with internal thread regular polygon gasket - Google Patents
Check bolt group with internal thread regular polygon gasket Download PDFInfo
- Publication number
- CN214661426U CN214661426U CN202022970382.4U CN202022970382U CN214661426U CN 214661426 U CN214661426 U CN 214661426U CN 202022970382 U CN202022970382 U CN 202022970382U CN 214661426 U CN214661426 U CN 214661426U
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- nut
- gasket
- thread
- internal thread
- loosening
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- 230000033001 locomotion Effects 0.000 abstract description 9
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 8
- 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 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 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
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- Gasket Seals (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
A check bolt group with an internal thread regular polygon gasket realizes that a nut is screwed with two different threads simultaneously after the nut and the gasket 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 utility model relates to a take lockbolt group of internal screw thread regular polygon gasket and operation method thereof, it passes through nut and gasket pretension back, realizes that the nut closes with two kinds of different screw threads soon simultaneously. The movement of different screw threads of structural element interferes each other, restricts each other for nut relative rotation can not produce, thereby has avoided the relative rotation of screw thread pair, prevents that the threaded connection is not hard up, improves the hookup effect, reduces the maintenance, the maintenance of threaded connection, belongs to the locking field of mechanical engineering 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 punching, and applying adhesives between thread pairs are used to prevent loosening.
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 screw thread pairs is directly limited by a stop member. Such as the use of cotter pins, tandem wires, and stop washers. This way the disassembly is inconvenient.
Rivet welding, punching, adhesive coating and the like destroy the relationship of the thread pair, and the thread pair is converted into a non-kinematic pair, so that the possibility of relative rotation is eliminated. But this is already a non-detachable coupling.
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 utility model provides a technical scheme that its technical problem adopted:
the utility model provides a take anti-loosening bolt group of internal screw thread regular polygon gasket which characterized by: the inner hole of the nut penetrates through the two ends, and the surface of the inner hole is provided with an internal thread; the nut has two parts of outline, wherein the upper part is hexagonal, the lower part is cylindrical, and the diameter of the cylindrical is smaller than that of an inscribed circle of the hexagonal; the outer surface of the cylinder is provided with a non-self-locking external thread with a lead angle more than 3 times larger than that of the internal thread, and the external thread has no self-locking property; the parameters of the internal thread of the regular polygonal gasket with the internal thread are the same as those of the non-self-locking external thread on the cylindrical part of the nut, the regular polygonal gasket with the internal thread and the non-self-locking external thread can be screwed together, and the top end of the internal thread is provided with a flange which prevents the external thread from being screwed out of the thickness of the gasket; the outline of the gasket is a regular polygon, and the distance s between the opposite sides of the outline is the same as the hexagon s of the nut; the regular polygonal gasket is at least a regular 24-sided polygon.
The operation method is characterized in that: when in use, the non-self-locking external thread on the cylindrical part of the nut is screwed into the gasket until the non-self-locking external thread abuts against a flange in front of the internal thread of the gasket; then the two are sleeved by a screw rod and rotate together until the two are tightly screwed together and the screwing is stopped until the specified pretightening force is reached. During the screwing process, the washer and the nut must be ensured to rotate together without relative movement.
When the nut is dismounted, as long as the nut and the gasket rotate together, no relative movement exists between the nut and the gasket, no interference is generated, and the unscrewing operation of the nut is not influenced.
The beneficial effects of the utility model are that, a take anti-loosening bolt group of internal screw thread regular polygon gasket realizes that the nut closes with two kinds of different screw threads soon simultaneously behind nut and gasket pretension. 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 present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic axial section of the coupling of the present invention.
FIG. 2 is an axial cross-section of a regular polygon shim with internal threads.
Fig. 3 is an axial cross-sectional view of a nut having a hexagonal upper portion and a cylindrical lower portion.
In the figure:
1. regular polygon gasket 2 with internal thread and non-self-locking internal thread of gasket
3. Gasket inner flange 4. gasket inner through hole
5. A nut 6 with hexagonal upper part and cylindrical lower part and internal thread
7. Through hole 8 in nut, hexagonal area of nut
9. Nut cylindrical region 10. non self-locking external screw thread of nut
11. Bolt 12 connected workpiece 1
13. The washer is coupled to the workpiece 2.
Detailed Description
In the embodiment of fig. 1, the regular polygonal shims with internal threads are chosen to be regular 24 sided. When in use, the external thread (10) on the cylindrical part of the nut (5) is screwed into the gasket (1) until the flange (3) in front of the internal thread of the gasket is screwed; then the two are sleeved on a screw (11) together and rotate together. As the distance s between the outer contour and the opposite side of the hexagonal nut (5) and the regular 24-edge gasket (1) is the same, the planes of the outer porches are overlapped. During screwing operation, the tooth mouths of the wrench can simultaneously engage with the contour planes of the nut (5) and the gasket (1) to apply force, and the wrench rotates clockwise until the nut and the gasket are screwed tightly and the screwing is stopped until a specified pretightening force is reached. During the screwing process, the nut (5) and the gasket (1) must be ensured to rotate together and not to move relatively.
After the nut (5) is pre-tightened with the gasket (1), the nut (5) is simultaneously screwed with two different threads. Because the lead angle and the thread pitch of the two threads are different, when the nut (5) is to generate relative rotation, the axial displacement of the two threads is different in the same corner, and the two threads interfere with each other and are restricted with each other, so that the relative rotation can not be generated, the relative rotation of the thread pair is avoided, and the purpose of preventing looseness by utilizing the structural motion interference is realized.
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.
Claims (1)
1. The utility model provides a take anti-loosening bolt group of internal screw thread regular polygon gasket which characterized by: the inner hole of the nut penetrates through the two ends, and the surface of the inner hole is provided with an internal thread; the nut has two parts of outline, wherein the upper part is hexagonal, the lower part is cylindrical, and the diameter of the cylindrical is smaller than that of an inscribed circle of the hexagonal; the outer surface of the cylinder is provided with a non-self-locking external thread with a lead angle more than 3 times larger than that of the internal thread, and the external thread has no self-locking property; the parameters of the internal thread of the regular polygonal gasket with the internal thread are the same as those of the non-self-locking external thread on the cylindrical part of the nut, the regular polygonal gasket with the internal thread and the non-self-locking external thread can be screwed together, and the top end of the internal thread is provided with a flange which prevents the external thread from being screwed out of the thickness of the gasket; the outline of the gasket is a regular polygon, and the distance s between the opposite sides of the outline is the same as the hexagon s of the nut; the regular polygonal gasket is at least a regular 24-sided polygon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022970382.4U CN214661426U (en) | 2020-12-13 | 2020-12-13 | Check bolt group with internal thread regular polygon gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022970382.4U CN214661426U (en) | 2020-12-13 | 2020-12-13 | Check bolt group with internal thread regular polygon gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214661426U true CN214661426U (en) | 2021-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022970382.4U Expired - Fee Related CN214661426U (en) | 2020-12-13 | 2020-12-13 | Check bolt group with internal thread regular polygon gasket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214661426U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483531A (en) * | 2020-12-13 | 2021-03-12 | 重庆科技学院 | Check bolt group with internal thread regular polygon gasket and operation method thereof |
-
2020
- 2020-12-13 CN CN202022970382.4U patent/CN214661426U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483531A (en) * | 2020-12-13 | 2021-03-12 | 重庆科技学院 | Check bolt group with internal thread regular polygon gasket and operation method thereof |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211109 |