CN112983959A - Nut locked in screwing process - Google Patents
Nut locked in screwing process Download PDFInfo
- Publication number
- CN112983959A CN112983959A CN202110319759.6A CN202110319759A CN112983959A CN 112983959 A CN112983959 A CN 112983959A CN 202110319759 A CN202110319759 A CN 202110319759A CN 112983959 A CN112983959 A CN 112983959A
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- China
- Prior art keywords
- nut
- inner nut
- conical surface
- outer sleeve
- face
- 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.)
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000010959 steel Substances 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
- F16B37/00—Nuts or like thread-engaging members
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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
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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
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
Abstract
The invention relates to a nut locked in a screwing process, and belongs to the technical field of manufacturing equipment. The technical scheme is as follows: the inner nut (2) is provided with an internal thread matched with the connecting bolt, one end of the inner nut (2) is of an outer hexagonal (2-1) structure, the other end of the inner nut (2) is of an inner nut conical surface (2-2) structure, the diameter of one end, close to the outer hexagonal (2-1), of the inner nut conical surface (2-2) is larger than that of one end, far away from the outer hexagonal (2-1), of the inner nut conical surface, and a plurality of open grooves (2-3) are formed in the inner nut conical surface (2-2) along the axial direction; the outer sleeve (1-1) is provided with an inner hexagonal surface (1-1) and an outer sleeve conical surface (1-2) which are matched with the outer hexagonal surface (2-1) and the inner nut conical surface (2-2) of the inner nut (2); the outer sleeve (1) and the inner nut (2) are combined together to form the locking nut in the screwing process. The invention has the beneficial effects that: the nut and the bolt can be screwed together, and the purpose of looseness prevention is achieved.
Description
Technical Field
The invention relates to a nut locked in a screwing process, and belongs to the technical field of manufacturing equipment.
Background
Along with the large-scale of the manufacturing equipment in China, the requirements on the stability and the reliability of various power transmissions are higher and higher, and particularly in the aspects of steel structure buildings and vehicles relating to personnel safety, the requirements on the reliability of bolt connection and fastening are stricter, and even the nut which is never loosened is required.
Disclosure of Invention
The invention aims to provide a nut locked in a screwing process, which can enable the nut and a bolt to be screwed together, achieves the purpose of looseness prevention and solves the problems in the background technology.
The technical scheme of the invention is as follows:
a nut locked in a screwing process comprises an outer sleeve and an inner nut, wherein the inner nut is provided with an internal thread matched with a connecting bolt, one end of the inner nut is of an outer hexagonal structure, the other end of the inner nut is of an inner nut conical surface structure, the diameter of one end, close to the outer hexagonal, of an inner nut conical surface is larger than that of one end, far away from the outer hexagonal, of the inner nut conical surface, and a plurality of open grooves are formed in the inner nut conical surface along the axial direction; the outer sleeve is provided with an inner hexagonal surface and an outer sleeve conical surface which are matched with the outer hexagonal surface and the inner nut conical surface of the inner nut; the outer sleeve and the inner nut are combined together to form the nut locked in the screwing process.
And a gap is arranged between the end surface of the inner hexagon and the end surface of the outer hexagon in the locked nut formed by combining the outer sleeve and the inner nut in the screwing process, and a gap is arranged between the end surface of the conical surface of the inner nut and the end surface of the conical surface of the outer sleeve.
The clearance between the end face of the inner nut conical surface and the end face of the outer sleeve conical surface is larger than the clearance between the end faces of the inner hexagon and the outer hexagon.
The clearance between the end face of the inner nut conical surface and the end face of the outer sleeve conical surface is 1-1.5mm larger than the clearance between the end faces of the inner hexagon and the outer hexagon.
Four open grooves are uniformly distributed on the conical surface of the inner nut along the axial direction, and the included angle between every two adjacent open grooves is 90 degrees.
The invention has the beneficial effects that: when the nut is screwed to the fastening surface, along with the further screwing of the nut, the outer sleeve of the nut generates a compressed radial force on the inner nut, so that the nut and the screw thread of the bolt are compressed, the screw threads are buckled with each other, and the purpose of preventing loosening is achieved.
Drawings
FIG. 1 is a front view of an inner nut;
FIG. 2 is a left side view of the inner nut;
FIG. 3 is a cross-sectional view of the jacket;
FIG. 4 is a left side view of the outer cover;
FIG. 5 is a schematic view of the nut prior to tightening;
FIG. 6 is a schematic view of the nut after it is tightened;
in the figure: the connecting device comprises an outer sleeve 1, an inner hexagon 1-1, an outer sleeve conical surface 1-2, an inner nut 2, an outer hexagon 2-1, an inner nut conical surface 2-2, an open groove 2-3, a conical contact surface 3, a first connecting piece 4, a second connecting piece 5 and a connecting bolt 6.
Detailed Description
The invention is further illustrated by way of example in the following with reference to the accompanying drawings.
Referring to the attached drawings 1-6, a nut locked in a screwing process comprises an outer sleeve 1 and an inner nut 2, wherein the inner nut 2 is provided with an internal thread matched with a connecting bolt, one end of the inner nut 2 is of an outer hexagonal 2-1 structure, the other end of the inner nut 2 is of an inner nut conical surface 2-2 structure, the diameter of one end, close to the outer hexagonal 2-1, of the inner nut conical surface 2-2 is larger than that of one end, far away from the outer hexagonal 2-1, of the inner nut conical surface 2-2, and a plurality of open grooves 2-3 are formed in the inner nut conical surface 2-2 along the axial direction; the outer sleeve 1-1 is provided with an inner hexagon 1-1 and an outer sleeve conical surface 1-2 which are matched with the outer hexagon 2-1 and the inner nut conical surface 2-2 of the inner nut 2; the outer sleeve 1 and the inner nut 2 are combined together to form the nut locked in the screwing process.
In this embodiment, referring to fig. 1 and 2, the left half of the inner nut 2 is a hexagonal structure of a common bolt, the right half is a tapered structure with a large left and a small right, and four symmetrical open slots are formed in the tapered structure, so that the nut can be self-locked when being screwed.
Referring to fig. 3 and 4, the left half part of the outer sleeve is of a hexagonal structure with an inner hexagonal hole, and the inner hexagonal hole is in clearance fit with the inner nut hexagonal. The right half part is a reverse taper hole with the same taper as the inner nut. When in use, the components are combined firstly and then used after being matched and combined.
Referring to fig. 5 and 6, after the outer sleeve and the inner nut of the nut are matched and combined, when the conical surfaces are tightly attached but radial force is not generated, a gap B1 of 3-5mm exists between the end surfaces of the inner hexagon and the outer hexagon, and the specific size value is determined according to the specification and the model of the nut, as shown in fig. 5; a gap B2 exists between the end surfaces of the inner nut and the outer sleeve, as shown in figure 5; the B2 is 1-1.5mm larger than the B1, so that a gap of 1-1.5mm between B3 and B2 and B1 exists after the locknut is screwed, and the gap can ensure that the composite nut can effectively realize self-locking after being screwed.
The working principle of the nut is as follows:
referring to fig. 1-6, the inner nut and the outer sleeve are first combined, or the inner hexagonal hole of the outer sleeve is first sleeved on the bolt, and then the outer hexagonal hole of the inner nut is screwed in along the screw rod, so that the inner nut and the outer sleeve are matched together. In the screwing process, the right end face of the outer sleeve is firstly contacted with the fastening face of the connecting piece, at the moment, the fastening face of the connecting piece generates outward thrust on the outer sleeve, and the outer sleeve does not move towards the fastening face along the axis after the screwing force is continuously applied. In the process of continuously applying the screwing force, the inner nut moves relative to the nut outer sleeve along the axis to the direction of the fastening surface, the outer hexagon of the inner nut gradually sinks into the inner hexagon hole of the outer sleeve, the conical part of the inner nut is gradually compressed with the inverted conical surface of the outer sleeve in the moving process, and the radial component force generated by the outer sleeve on the conical part of the inner nut enables the thread screw of the conical part of the inner nut to be compressed with the thread screw of the screw rod, so that self-locking is realized. The four symmetrical open grooves of the conical part of the inner nut play a role in assisting the compression deformation.
In the fastening process of the nut, the end face of the outer sleeve is in contact with the fastening face, the relative contact area is smaller than that of a common nut, the friction resistance of the fastening face is smaller, and the effective fastening of the nut is facilitated; meanwhile, after the outer sleeve is fastened in place, the end face of the outer sleeve still contacts with the fastening face (see the attached figure 6), when the fastening face is impacted and vibrated, firstly, the outer sleeve receives impact force, the impact force is transmitted to the inner nut, and due to radial component force generated by the conical contact face, the screw thread of the inner nut is more tightly pressed with the screw thread of the screw rod, the self-locking force is increased, and effective anti-loosening is realized.
After the nut is disassembled, the screw rod is not damaged, but the disassembling force required in the nut disassembling process is larger than that of common threaded connection, the outer sleeve and the inner nut can be separated after being unscrewed for 2-3 circles with great force, the self-locking force of the nut can be thoroughly released, and the anti-loosening capability of the nut is superior to that of the existing nut in the market.
Claims (5)
1. The utility model provides a nut of locking of in-process of screwing which characterized in that: the connecting bolt comprises an outer sleeve (1) and an inner nut (2), wherein the inner nut (2) is provided with an internal thread matched with the connecting bolt, one end of the inner nut (2) is of an outer hexagonal (2-1) structure, the other end of the inner nut (2) is of an inner nut conical surface (2-2) structure, the diameter of one end, close to the outer hexagonal (2-1), of the inner nut conical surface (2-2) is larger than that of one end, far away from the outer hexagonal (2-1), of the inner nut conical surface, and a plurality of open grooves (2-3) are formed in the inner nut conical surface (2-2) along the axial direction; the outer sleeve (1-1) is provided with an inner hexagonal surface (1-1) and an outer sleeve conical surface (1-2) which are matched with the outer hexagonal surface (2-1) and the inner nut conical surface (2-2) of the inner nut (2); the outer sleeve (1) and the inner nut (2) are combined together to form the locking nut in the screwing process.
2. The lock nut in tightening according to claim 1, wherein: a gap (B1) is arranged between the end face of the inner hexagon (1-1) and the end face of the outer hexagon (2-1) in the locked nut formed by combining the outer sleeve (1) and the inner nut (2) in the screwing process, and a gap (B2) is arranged between the end face of the inner nut conical surface (2-2) and the end face of the outer sleeve conical surface (1-2).
3. The nut for locking during tightening of claim 2, wherein: the clearance (B2) between the end face of the inner nut conical surface (2-2) and the end face of the outer sleeve conical surface (1-2) is larger than the clearance (B1) between the end face of the inner hexagon (1-1) and the end face of the outer hexagon (2-1).
4. A nut for clinching during tightening as claimed in claim 3, wherein: the clearance (B2) between the end surface of the inner nut conical surface (2-2) and the end surface of the outer sleeve conical surface (1-2) is 1-1.5mm larger than the clearance (B1) between the end surface of the inner hexagon (1-1) and the end surface of the outer hexagon (2-1).
5. The lock nut in tightening according to claim 1, wherein: four open grooves (2-3) are uniformly distributed on the conical surface (2-2) of the inner nut along the axial direction, and the included angle between every two adjacent open grooves (3) is 90 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110319759.6A CN112983959A (en) | 2021-03-25 | 2021-03-25 | Nut locked in screwing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110319759.6A CN112983959A (en) | 2021-03-25 | 2021-03-25 | Nut locked in screwing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112983959A true CN112983959A (en) | 2021-06-18 |
Family
ID=76333586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110319759.6A Withdrawn CN112983959A (en) | 2021-03-25 | 2021-03-25 | Nut locked in screwing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112983959A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0763212A (en) * | 1993-08-26 | 1995-03-07 | Nabco Ltd | Nut locking device |
| CN203594672U (en) * | 2013-12-10 | 2014-05-14 | 祝月强 | Novel assembly connection nut |
| CN106640914A (en) * | 2016-12-12 | 2017-05-10 | 华和平 | Radial locking anti-loose retreating-stopping nut |
| CN106837976A (en) * | 2016-11-18 | 2017-06-13 | 华和平 | A kind of threaded fastener companion |
| CN107740807A (en) * | 2017-11-29 | 2018-02-27 | 忻建国 | A kind of combination stop nut locked using tapered thread |
| CN110454488A (en) * | 2019-07-23 | 2019-11-15 | 瑞通机械张家口有限公司 | A kind of compound nut that automatically lock is anti-loosening |
| CN209875699U (en) * | 2019-05-10 | 2019-12-31 | 赵月 | Novel anti-loosening nut |
| CN112128209A (en) * | 2020-08-12 | 2020-12-25 | 江苏大学 | Upper locking type elastic conical locknut |
-
2021
- 2021-03-25 CN CN202110319759.6A patent/CN112983959A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0763212A (en) * | 1993-08-26 | 1995-03-07 | Nabco Ltd | Nut locking device |
| CN203594672U (en) * | 2013-12-10 | 2014-05-14 | 祝月强 | Novel assembly connection nut |
| CN106837976A (en) * | 2016-11-18 | 2017-06-13 | 华和平 | A kind of threaded fastener companion |
| CN106640914A (en) * | 2016-12-12 | 2017-05-10 | 华和平 | Radial locking anti-loose retreating-stopping nut |
| CN107740807A (en) * | 2017-11-29 | 2018-02-27 | 忻建国 | A kind of combination stop nut locked using tapered thread |
| CN209875699U (en) * | 2019-05-10 | 2019-12-31 | 赵月 | Novel anti-loosening nut |
| CN110454488A (en) * | 2019-07-23 | 2019-11-15 | 瑞通机械张家口有限公司 | A kind of compound nut that automatically lock is anti-loosening |
| CN112128209A (en) * | 2020-08-12 | 2020-12-25 | 江苏大学 | Upper locking type elastic conical locknut |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210618 |
|
| WW01 | Invention patent application withdrawn after publication |