CN110630617A - Two-way screw thread locking device - Google Patents
Two-way screw thread locking device Download PDFInfo
- Publication number
- CN110630617A CN110630617A CN201910801637.3A CN201910801637A CN110630617A CN 110630617 A CN110630617 A CN 110630617A CN 201910801637 A CN201910801637 A CN 201910801637A CN 110630617 A CN110630617 A CN 110630617A
- Authority
- CN
- China
- Prior art keywords
- gasket
- thread
- nut
- backing ring
- lower nut
- Prior art date
- 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.)
- Pending
Links
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Images
Classifications
-
- 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
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts
- F16B39/16—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts in which the screw-thread of the locknut differs from that of the nut
Abstract
The invention belongs to the field of mechanical structures, and particularly relates to a bidirectional thread anti-loosening device. The upper part of the bidirectional bolt is provided with reverse threads and forward threads, a first gasket is tightly attached to the head of the bidirectional bolt, a third gasket is arranged on the upper part of the first gasket, a workpiece to be firmed is arranged between the first gasket and the third gasket, a lower nut is arranged on the third gasket, the lower nut is positioned in a forward thread area, the upper part of the lower nut is provided with a backing ring, the upper part of the backing ring is provided with a second gasket and an upper nut, and the upper nut is positioned in a reverse thread area. The device of the invention not only can ensure that the mechanical strength is not reduced, but also can ensure that the structure is simple and the repeated disassembly and assembly are convenient.
Description
Technical Field
The invention belongs to the field of mechanical structures, and particularly relates to a bidirectional thread anti-loosening device.
Background
Thread constructions have found wide application in machine design and have long been used in a variety of machines, the most common method of attachment. The screw rod and the nut are two major components forming a thread structure.
Despite the long history of use of threaded structures, fasteners frequently experience strong vibration and often loosen and lose the coupling function, and such coupling failure sometimes even causes major engineering accidents. The present anti-loose method mainly includes the steps of providing slotted nut with split pin, installing plastic tightening mouth on the nut and adhering solidified nut. However, the methods have many defects, and some methods need to punch holes on the screw rod and open grooves on the nut, so that the mechanical strength is greatly reduced, and the processing difficulty of parts is increased; some anti-loosening methods are not aging-resistant, and can age and deteriorate after a long time, and lose the anti-loosening function; and the other parts can cause difficulty in disassembly and bring inconvenience to maintenance and replacement.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a bidirectional thread anti-loosening device. The device of the invention can not only ensure that the mechanical strength is not reduced, but also ensure that the structure is simple, the repeated assembly and disassembly are convenient, and the purpose of stable and reliable looseness prevention is realized.
The technical scheme of the invention is as follows: the utility model provides a two-way screw thread locking device, includes first gasket, lower nut, backing ring, second gasket, upper nut, two-way bolt, third gasket, upper nut, second gasket, backing ring, lower nut, first gasket from last to concatenating on two-way bolt down in proper order, its characterized in that: the upper portion of the bidirectional bolt is provided with a reverse thread and a forward thread, the first gasket is tightly attached to the head of the bidirectional bolt, the third gasket is arranged on the upper portion of the first gasket, a firm workpiece is arranged between the first gasket and the third gasket, the lower nut is arranged on the third gasket, the lower nut is located between the forward thread and is a backing ring, the upper portion of the backing ring is provided with the second gasket and the upper nut, and the upper nut is located between the reverse thread and the backing ring.
The bidirectional thread anti-loosening device is characterized in that: the lower nut is a right-handed thread and the upper nut is a left-handed thread.
The bidirectional thread anti-loosening device is characterized in that: the lower nut is a left-hand thread and the upper nut is a right-hand thread.
The bidirectional thread anti-loosening device is characterized in that: the minor diameter of the lower nut thread is 1mm to 10mm larger than the major diameter of the upper nut minor thread.
The bidirectional thread anti-loosening device is characterized in that: the contact surfaces of the lower nut and the upper nut with the backing ring are provided with knurling textures.
Compared with the prior art, the invention has the beneficial effects that:
1. the structure does not slot or drill holes on the bolt and the nut, and does not influence the mechanical strength of the bolt and the nut.
2. The structure adopts all standard components, does not need special tools, and the installation is simple.
3. The structure does not adopt glue or plastics, can relapse the dismouting, does not influence locking effect.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the bidirectional bolt.
Description of reference numerals: the device comprises a first gasket 1, a workpiece to be fastened 2, a lower nut 3, a backing ring 4, a second gasket 5, an upper nut 6, a bidirectional bolt 7, a third gasket 8, a reverse thread 9 and a forward thread 10.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
As shown in fig. 1 and 2, the two-way threaded anti-loosening device of the invention comprises a first gasket 1, a lower nut 3, a backing ring 4, a second gasket 5, an upper nut 6, a two-way bolt 7 and a third gasket 8, wherein the upper nut 6, the second gasket 5, the backing ring 4, the lower nut 3 and the first gasket 1 are sequentially connected in series on the two-way bolt 7 from top to bottom, reverse threads 9 and forward threads 10 are arranged on the upper portion of the two-way bolt 7, the first gasket 1 is tightly attached to the head of the two-way bolt 7, the third gasket 8 is arranged on the upper portion of the first gasket 1, a workpiece 2 to be fastened is arranged between the first gasket 1 and the third gasket 8, the lower nut 3 is arranged on the third gasket 8, the lower nut 3 is located in a range of the forward threads 10, the upper portion of the lower nut 3 is the backing ring 4, the upper portion of the backing ring 4 is provided with the second gasket 5 and the upper nut 6, and.
The lower nut 3 can be a right-handed thread, the upper nut 6 can be a left-handed thread, and the other arrangement can be reversed, namely the lower nut 3 is a left-handed thread, the upper nut 6 is a right-handed thread, the reverse thread 9 and the forward thread 10 are correspondingly arranged, and the effects of the two arrangement modes are the same.
In the present invention, the lower nut 3 is preferably slightly larger than the upper nut 6 for easy assembly. The small diameter of the thread of the lower nut 3 is 1mm to 10mm larger than the large diameter of the small thread of the upper nut 6.
In the present invention, the contact surfaces of the lower nut 3 and the upper nut 6 with the backing ring 4 are preferably provided with knurling textures for increasing the friction force between the nuts and the backing ring.
In the invention, the upper nut 6 and the lower nut 3 are separated by the backing ring 4, and the functions of bearing the pretightening force of the upper nut 6 and transmitting the static friction torque are realized.
When the lower nut 3 is in right-handed thread and the upper nut 6 is in left-handed thread, when the structure of the invention is disturbed by clockwise torque, the upper nut 6 transmits the disturbing torque to the backing ring 4 through the static friction force of the joint surface and then to the lower nut 3, the lower nut 3 is in right-handed thread, the clockwise torque can only clamp the structure in a tightening direction, and the lower nut 3 cannot rotate because the previous pretightening force is large enough, and the upper nut 6 cannot be loosened by the reaction force. When the structure receives the disturbance of anticlockwise moment, upper nut 6 transmits the disturbance moment to backing ring 4 through the static friction force on composition surface, and then to lower nut 3, lower nut 3 is the right-handed screw, and anticlockwise moment probably makes lower nut 3 have the trend of upwards loosening, because upper nut 6 is the left-handed screw, has the trend that has the downward removal of the moment effect that receives the anticlockwise, consequently two nuts and backing ring can compress more tightly more, because the pretightning force when fastening is enough big, the disturbance moment can not make the structure rotate.
Claims (5)
1. The utility model provides a two-way screw thread locking device, includes first gasket, lower nut, backing ring, second gasket, upper nut, two-way bolt, third gasket, upper nut, second gasket, backing ring, lower nut, first gasket from last to concatenating on two-way bolt down in proper order, its characterized in that: the upper portion of the bidirectional bolt is provided with a reverse thread and a forward thread, the first gasket is tightly attached to the head of the bidirectional bolt, the third gasket is arranged on the upper portion of the first gasket, a firm workpiece is arranged between the first gasket and the third gasket, the lower nut is arranged on the third gasket, the lower nut is located between the forward thread and is a backing ring, the upper portion of the backing ring is provided with the second gasket and the upper nut, and the upper nut is located between the reverse thread and the backing ring.
2. A two-way thread anti-loosening device as claimed in claim 1, wherein: the lower nut is a right-handed thread and the upper nut is a left-handed thread.
3. A two-way thread anti-loosening device as claimed in claim 1, wherein: the lower nut is a left-hand thread and the upper nut is a right-hand thread.
4. A two-way thread anti-loosening device as claimed in claim 1, wherein: the minor diameter of the lower nut thread is 1mm to 10mm larger than the major diameter of the upper nut minor thread.
5. A two-way thread anti-loosening device as claimed in claim 1, wherein: the contact surfaces of the lower nut and the upper nut with the backing ring are provided with knurling textures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910801637.3A CN110630617A (en) | 2019-08-28 | 2019-08-28 | Two-way screw thread locking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910801637.3A CN110630617A (en) | 2019-08-28 | 2019-08-28 | Two-way screw thread locking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110630617A true CN110630617A (en) | 2019-12-31 |
Family
ID=68969349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910801637.3A Pending CN110630617A (en) | 2019-08-28 | 2019-08-28 | Two-way screw thread locking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110630617A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3149555U (en) * | 2009-01-20 | 2009-04-02 | 一心エンジニアリング有限会社 | Loose fastening member |
| CN202560769U (en) * | 2012-04-11 | 2012-11-28 | 宁波金鼎紧固件有限公司 | Check bolt and nut connecting pair |
| CN205715164U (en) * | 2016-04-12 | 2016-11-23 | 中国第一汽车股份有限公司 | Self-locking type check bolt assembly |
| CN208778454U (en) * | 2018-08-15 | 2019-04-23 | 吴雁南 | A kind of anti-loose fastener of compound thread |
-
2019
- 2019-08-28 CN CN201910801637.3A patent/CN110630617A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3149555U (en) * | 2009-01-20 | 2009-04-02 | 一心エンジニアリング有限会社 | Loose fastening member |
| CN202560769U (en) * | 2012-04-11 | 2012-11-28 | 宁波金鼎紧固件有限公司 | Check bolt and nut connecting pair |
| CN205715164U (en) * | 2016-04-12 | 2016-11-23 | 中国第一汽车股份有限公司 | Self-locking type check bolt assembly |
| CN208778454U (en) * | 2018-08-15 | 2019-04-23 | 吴雁南 | A kind of anti-loose fastener of compound thread |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |