CN108825633B - Self-tightening screw - Google Patents
Self-tightening screw Download PDFInfo
- Publication number
- CN108825633B CN108825633B CN201810750925.6A CN201810750925A CN108825633B CN 108825633 B CN108825633 B CN 108825633B CN 201810750925 A CN201810750925 A CN 201810750925A CN 108825633 B CN108825633 B CN 108825633B
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- fastening
- ring
- cavity
- nut
- self
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- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims description 4
- 239000013013 elastic material Substances 0.000 claims description 3
- 244000098674 Pinus cembroides Species 0.000 abstract 1
- 235000005013 Pinus cembroides Nutrition 0.000 abstract 1
- 235000008591 Pinus cembroides var edulis Nutrition 0.000 abstract 1
- 235000015593 Pinus monophylla Nutrition 0.000 abstract 1
- 235000015594 Pinus parryana Nutrition 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 description 5
- 238000005381 potential energy Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003825 pressing 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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- 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
- F16B39/284—Locking by means of elastic deformation
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
The invention relates to a self-tightening screw, which comprises a screw rod, a nut and a fastening ring; the fastening ring and the nut are coaxially sleeved on the screw rod, and matched anti-slip teeth are carved on the ring surface of the fastening ring opposite to the nut; an annular fastening cavity is formed in the fastening ring, and the axis of the fastening cavity is parallel to the axis of the fastening ring; a transmission ring is arranged in the fastening cavity, and a fastening coil spring is connected between the transmission ring and the fastening cavity; an anti-falling washer is coaxially sleeved outside the transmission ring, an elastic layer is arranged between an upper ring surface of the anti-falling washer and the fastening cavity, and a lower ring surface of the anti-falling washer is exposed from the fastening cavity; a limiting column used for limiting the rotation of the anti-falling washer is arranged on the fastening ring, and a limiting hole matched with the limiting column is formed in the anti-falling washer; this self-tightening screw novel structure, principle are unique, can prevent effectively that the nut pine from taking off, guarantee the firm connection of subassembly.
Description
Technical Field
The invention relates to a screw, in particular to a screw capable of preventing loosening.
Background
The device is screwed and fixed through the screw during assembly, the device can generate high-frequency micro vibration during high-speed operation, the micro vibration easily causes the loosening of the screw, the connection of the assembly is not firm, and safety accidents are easily caused, so that many enterprises pay great attention to the fastening of the screw, and even after the assembly is screwed and fixed by the screw, many enterprises directly weld the screw cap, but the method causes great obstruction to subsequent maintenance and also seriously affects the maintenance of the device; therefore, the appearance of the self-tightening screw is concerned and favored by enterprises; however, the self-tightening screws used in China are mainly imported, and when the trade and war starts, the shortage of the independent technology can seriously limit the defense force of China.
Disclosure of Invention
In order to solve the problems, the invention provides the self-tightening screw which is novel in structure and unique in principle, can effectively prevent the nut from loosening and ensures the firm connection of the components.
In order to solve the problems, the technical scheme adopted by the invention is as follows: the self-tightening screw comprises a screw rod, a nut and a fastening ring, wherein the screw rod and the nut are combined through threads; the fastening ring and the nut are coaxially sleeved on the screw rod, and matched anti-slip teeth are carved on the ring surface of the fastening ring opposite to the nut; an annular fastening cavity is formed in the fastening ring, and the axis of the fastening cavity is parallel to the axis of the fastening ring; a transmission ring is arranged in the fastening cavity, a fastening coil spring is connected between the transmission ring and the fastening cavity, the inner ring end of the fastening coil spring is fixedly connected to the cavity wall of the fastening cavity, and the outer ring end of the fastening coil spring is fixedly connected to the inner ring wall of the transmission ring; an anti-falling washer is coaxially sleeved outside the transmission ring, an inner ring of the anti-falling washer is meshed with an outer ring of the transmission ring through a limiting stripe, an elastic layer is arranged between an upper ring surface of the anti-falling washer and the fastening cavity, and a lower ring surface of the anti-falling washer is exposed out of the fastening cavity; the anti-falling washer and the transmission ring can slide relative to the fastening cavity; the fastening ring is provided with a limiting column used for limiting rotation of the anti-falling washer, and the anti-falling washer is provided with a limiting hole matched with the limiting column.
The invention has the beneficial effects that: during production and processing, the fastening coil spring is pre-screwed, so that sufficient elastic potential energy is stored in the fastening coil spring; inserting the limiting column into the limiting hole, and limiting and locking the anti-falling washer; when the self-tightening screw assembling instrument is used, after a screw rod penetrates into a screw hole, a fastening ring is sleeved on the screw rod in a sliding mode, and then a nut is sleeved on the screw rod in a rotating mode, so that the nut and one surface of the fastening ring, which is provided with anti-skidding teeth, are paired oppositely; the anti-falling washer on the fastening ring faces the surface of the instrument; the nut is screwed to fix the instrument, the nut is meshed with the limiting teeth on the opposite surface of the fastening ring in a matching manner, the anti-falling washer is tightly attached to the instrument, and strong static friction force is generated between the anti-falling washer and the surface of the instrument, so that the anti-falling washer and the instrument are effectively prevented from sliding; the limiting column is taken down from the outside, at the moment, the anti-falling washer and the fastening cavity are free from limitation and can move relatively, the fastening ring rotates relative to the anti-falling washer under the action of the fastening coil spring, and the nut is driven to rotate continuously through the limiting tooth; the nut has the tendency to continue to be tightened, and the anti-slip washer is retracted into the tightening cavity under the pressing force, so that the whole self-tightening screw is completely assembled.
During use, the fastening coil spring always has a tendency to drive the fastening ring to rotate, so that the nut always has a tendency to be tightened; the high-frequency micro-vibration can cause the loosening of the nut during the operation process of the device, and when the device is used, the nut is always kept in a screwed state, and is reinforced by external force, so that the loosening of the nut is effectively prevented; in conclusion, the self-tightening screw always keeps the nut screwed tightly by utilizing the elastic potential energy stored in the fastening coil spring, so that the loosening caused by the vibration of the instrument is resisted; simultaneously, this structure is convenient to be dismantled, and use that can relapse facilitates for maintenance, the maintenance in later stage.
Preferably, the anti-slip teeth are wedge-shaped teeth extending along the circumferential direction of the fastening ring; so as to reduce the processing complexity and improve the anti-loosening effect.
Preferably, the tail end of the wedge-shaped tooth is provided with a buffer layer made of an elastic material; so as to counteract the vibration of the instrument and further to prevent the nut from loosening due to the rigid collision with the fastening ring.
Drawings
Fig. 1 is a schematic view of an assembly structure of an embodiment of the self-tightening screw.
Fig. 2 is a schematic cross-sectional view of the fastening ring in the embodiment of fig. 1.
Fig. 3 is a perspective view of the fastening ring in the embodiment of fig. 1.
Detailed Description
Example (b):
in the embodiment shown in fig. 1 to 3, the self-tightening screw comprises a screw rod 1, a nut 2 and a fastening ring 3, wherein the screw rod 1 and the nut 2 are combined through threads; the fastening ring 3 and the nut 2 are coaxially sleeved on the screw rod 1, and matched anti-skidding teeth 4 are carved on the ring surface of the fastening ring 3 opposite to the nut 2; the anti-skid teeth 4 are wedge-shaped teeth extending along the circumferential direction of the fastening ring 3; a buffer layer 41 made of elastic material is arranged at the tail end of the wedge-shaped tooth; an annular fastening cavity is formed in the fastening ring 3, and the axis of the fastening cavity is parallel to the axis of the fastening ring 3; a transmission ring 5 is arranged in the fastening cavity, a fastening coil spring 6 is connected between the transmission ring 5 and the fastening cavity, the inner ring end of the fastening coil spring 6 is fixedly connected to the cavity wall of the fastening cavity, and the outer ring end of the fastening coil spring 6 is fixedly connected to the inner ring wall of the transmission ring 5; an anti-falling washer 7 is coaxially sleeved outside the transmission ring 5, an inner ring of the anti-falling washer 7 is meshed and connected with an outer ring of the transmission ring 5 through limiting stripes, an elastic layer 8 is arranged between an upper ring surface of the anti-falling washer 7 and a fastening cavity, and a lower ring surface of the anti-falling washer 7 is exposed out of the fastening cavity; the anti-falling washer 7 and the transmission ring 5 can slide relative to the fastening cavity; a limiting column 9 for limiting the rotation of the anti-falling washer 7 is arranged on the fastening ring 3, and a limiting hole matched with the limiting column 9 is formed in the anti-falling washer 7; this structure can make things convenient for the operation personnel to set up in advance anticreep packing ring 7 to improve the anticreep effect of self-tightening screw.
During production and processing, the fastening coil spring 6 is pre-screwed, so that enough elastic potential energy is stored in the fastening coil spring 6; inserting the limiting column 9 into the limiting hole, and limiting and locking the anti-falling washer 7; when the self-tightening screw assembling instrument is used, after the screw rod 1 penetrates into the screw hole, the fastening ring 3 is sleeved on the screw rod 1 in a sliding mode, and then the nut 2 is sleeved on the screw rod 1 in a rotating mode, so that the nut 2 and one surface, provided with the anti-skidding teeth 4, of the fastening ring 3 are paired oppositely; the anti-slip washer 7 on the fastening ring 3 now faces the surface of the instrument; the nut 2 is screwed to fix the instrument, at the moment, the nut 2 is meshed with the limiting teeth on the surface opposite to the fastening ring 3 in a matching manner, the anti-falling washer 7 is tightly attached to the instrument, and the anti-falling washer 7 generates stronger static friction force with the surface of the instrument, so that the anti-falling washer 7 is effectively prevented from sliding with the instrument; the limiting column 9 is taken down from the outside, at the moment, the anti-falling washer 7 and the fastening cavity are free from limitation and can move relatively, the fastening ring 3 rotates relative to the anti-falling washer 7 under the action of the fastening coil spring 6, and the nut 2 is driven to continue rotating through the limiting teeth; the nut 2 has the tendency of continuing to be screwed, and the anti-falling washer 7 retracts into the fastening cavity under the extrusion force, so that the whole self-tightening screw is assembled; in the embodiment, the nut 2 is matched and meshed with the fastening ring 3 through the wedge-shaped tooth structure, and meanwhile, the buffer layer 41 at the tail end of the wedge-shaped tooth is extruded and deformed by the wedge-shaped tooth structure.
During use, the tightening coil spring 6 always has a tendency to drive the tightening ring 3 in rotation, and therefore the nut 2 always has a tendency to tighten; the high-frequency micro vibration of the device can cause the loosening of the nut 2 in the operation process, and when the device is used, the nut 2 is always kept in a tightening state, and is reinforced by external force, so that the loosening of the nut 2 is effectively prevented; meanwhile, the buffer layer 41 at the tail end of the wedge-shaped tooth can effectively counteract the micro-vibration of the instrument, and further reduce the loosening speed of the nut 2 due to rigid collision.
In conclusion, the self-tightening screw is novel in structure and unique in principle, and the nut 2 is always tightened by utilizing the elastic potential energy stored in the fastening coil spring 6, so that loosening caused by vibration of an instrument is resisted; meanwhile, the structure is convenient to disassemble and can be repeatedly used, and convenience is brought to later maintenance.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (3)
1. A self-tightening screw comprises a screw rod (1), a nut (2) and a fastening ring (3), wherein the screw rod (1) and the nut (2) are combined through threads; the method is characterized in that: the fastening ring (3) and the nut (2) are coaxially sleeved on the screw rod (1), and matched anti-skidding teeth (4) are carved on the ring surface of the fastening ring (3) opposite to the nut (2); an annular fastening cavity is formed in the fastening ring (3), and the axis of the fastening cavity is parallel to the axis of the fastening ring (3); a transmission ring (5) is arranged in the fastening cavity, a fastening coil spring (6) is connected between the transmission ring (5) and the fastening cavity, the inner ring end of the fastening coil spring (6) is fixedly connected to the cavity wall of the fastening cavity, and the outer ring end of the fastening coil spring (6) is fixedly connected to the inner ring wall of the transmission ring (5); an anti-falling washer (7) is coaxially sleeved outside the transmission ring (5), an inner ring of the anti-falling washer (7) is meshed and connected with an outer ring of the transmission ring (5) through limiting stripes, an elastic layer (8) is arranged between an upper ring surface of the anti-falling washer (7) and the fastening cavity, and a lower ring surface of the anti-falling washer (7) is exposed from the fastening cavity; the anti-falling washer (7) and the transmission ring (5) can slide relative to the fastening cavity; the anti-loosening device is characterized in that a limiting column (9) used for limiting rotation of the anti-loosening gasket (7) is arranged on the fastening ring (3), and a limiting hole matched with the limiting column (9) is formed in the anti-loosening gasket (7).
2. The self-tightening screw according to claim 1, wherein: the anti-skid teeth (4) are wedge-shaped teeth extending along the circumferential direction of the fastening ring (3).
3. The self-tightening screw according to claim 2, wherein: and a buffer layer (41) made of elastic material is arranged at the tail end of the wedge-shaped tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810750925.6A CN108825633B (en) | 2018-07-10 | 2018-07-10 | Self-tightening screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810750925.6A CN108825633B (en) | 2018-07-10 | 2018-07-10 | Self-tightening screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108825633A CN108825633A (en) | 2018-11-16 |
| CN108825633B true CN108825633B (en) | 2020-06-02 |
Family
ID=64136866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810750925.6A Active CN108825633B (en) | 2018-07-10 | 2018-07-10 | Self-tightening screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108825633B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111761695B (en) * | 2020-07-09 | 2021-04-23 | 贺新 | Embedded part mounting device for machine-made concrete slab |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2132018Y (en) * | 1992-02-17 | 1993-05-05 | 邵国强 | Torsion spring type thread anti-loosening device |
| JPH09257026A (en) * | 1996-01-17 | 1997-09-30 | Ikeya Kogyo Kk | Screw fixing tool |
| JPH10122222A (en) * | 1996-10-15 | 1998-05-12 | Shigezo Tatsumi | Self-locking nut with spring |
| JP2007016882A (en) * | 2005-07-07 | 2007-01-25 | Miyoshi Kikuo | Automatic tightening means |
| JP2009121577A (en) * | 2007-11-14 | 2009-06-04 | Satoshi Kokue | Lock nut device |
| CN102840214A (en) * | 2011-06-21 | 2012-12-26 | 北汽福田汽车股份有限公司 | Bolt group |
| CN206017411U (en) * | 2016-07-16 | 2017-03-15 | 温州市康华液压有限公司 | A kind of stop nut |
-
2018
- 2018-07-10 CN CN201810750925.6A patent/CN108825633B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2132018Y (en) * | 1992-02-17 | 1993-05-05 | 邵国强 | Torsion spring type thread anti-loosening device |
| JPH09257026A (en) * | 1996-01-17 | 1997-09-30 | Ikeya Kogyo Kk | Screw fixing tool |
| JPH10122222A (en) * | 1996-10-15 | 1998-05-12 | Shigezo Tatsumi | Self-locking nut with spring |
| JP2007016882A (en) * | 2005-07-07 | 2007-01-25 | Miyoshi Kikuo | Automatic tightening means |
| JP2009121577A (en) * | 2007-11-14 | 2009-06-04 | Satoshi Kokue | Lock nut device |
| CN102840214A (en) * | 2011-06-21 | 2012-12-26 | 北汽福田汽车股份有限公司 | Bolt group |
| CN206017411U (en) * | 2016-07-16 | 2017-03-15 | 温州市康华液压有限公司 | A kind of stop nut |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108825633A (en) | 2018-11-16 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200506 Address after: 523750 second floor, No.4, Mingzhu Second Road, shebei village, Huangjiang Town, Dongguan City, Guangdong Province Applicant after: Dongguan pin Gu Precision Hardware Products Co.,Ltd. Address before: 215000 Shuixiu Tiandi, Kaiping Road, Wujiang District, Suzhou City, Jiangsu Province, 2003 Applicant before: Gu Yufeng |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |