CN113062912A - Moment control type bolt and nut - Google Patents
Moment control type bolt and nut Download PDFInfo
- Publication number
- CN113062912A CN113062912A CN202110287985.0A CN202110287985A CN113062912A CN 113062912 A CN113062912 A CN 113062912A CN 202110287985 A CN202110287985 A CN 202110287985A CN 113062912 A CN113062912 A CN 113062912A
- Authority
- CN
- China
- Prior art keywords
- bolt
- nut
- locking
- protective
- protective outer
- 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
- 230000001681 protective effect Effects 0.000 claims abstract description 44
- 239000004033 plastic Substances 0.000 claims abstract description 12
- 238000007689 inspection Methods 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000012797 qualification Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material 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
- F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
- F16B41/002—Measures against loss of bolts, nuts or pins
-
- 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
-
- 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
- F16B39/028—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of an auxiliary bolt or threaded element whose action provokes the deformation of the main bolt or nut and thereby its blocking
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
The invention relates to the technical field of fasteners, and particularly discloses a torque control type bolt and nut, which comprises a protective sleeve; the two protective sleeves comprise bolt protective outer sleeves and nut protective outer sleeves; the bolt protective sleeve is sleeved on the connecting bolt, and the nut protective sleeve is sleeved on the nut body. According to the invention, the bolt protective outer sleeve is sleeved on the connecting bolt, so that an anticorrosive coating on the surface of the connecting bolt cannot be damaged after the connecting bolt is screwed down, secondary maintenance work is basically not required in the later period, and the maintenance cost can be saved to the greatest extent; the split of the plastic protective sleeve is used as a judgment basis for qualification of quality inspection, and the split rubber jacket can be conveniently recycled, so that a large amount of manpower, material resources and production cost are saved; the protection overcoat after splitting can not produce any change to the original structure and the size of bolt, avoids producing extra potential safety hazard in the use in later stage.
Description
Technical Field
The invention relates to the technical field of fasteners, in particular to a torque control type bolt and nut.
Background
Conventional twist-off nuts achieve locking by tightening the upper twist-off portion. When the predetermined torque value is reached, the central screw-off region breaks itself by exceeding its own maximum load-bearing value, so that the lower screw portion and the upper screw-off portion are separated. Therefore, in the later screwing quality inspection process, whether the screwed-off part is screwed off or not can be directly inspected to be used as the judgment basis of the screwing of the bolt.
From the working principle of screwing off the bolt it is easy to find that it presents two very significant drawbacks: 1. the upper end of the screw-off part cannot be used continuously after being screwed off, which causes material waste. In addition, the difficulty of cleaning the residual bolt head on site is high, and serious potential safety hazard is easily caused when the bolt head is not cleaned. 2. The twist-off area will form an exposed cross section after twist-off, and the exposed part will rust quickly because of no protection without the anticorrosion protection of the surface. Thereby accelerating the corrosion of the whole bolt pair and seriously influencing the service life of components and engineering projects. In addition, because the fracture surface is not a complete smooth surface, it is easy to scratch personnel on site.
And the bolt form with non-obvious control indexes is adopted for fixing, so that later detection is difficult. The actual installation condition of each bolt cannot be visually seen through eyes on site; the bolt and the nut are directly screwed according to the empirical value, the bolt is greatly extruded, and most of the surface anticorrosive coatings of the bolt and the nut are damaged. Meanwhile, the surface anticorrosive coatings of the bolts and the nuts are inevitably damaged in the screwing process of the bolts and the nuts, so that the corrosion of the bolts and the nuts can be accelerated under the indoor working condition and the outdoor working condition with poor conditions, the maintenance period of the whole project is greatly shortened, and the whole operation cost of the project is increased.
Disclosure of Invention
The present invention is directed to a torque-controlled bolt and nut to solve the above problems of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a torque control type bolt and nut comprises a protective sleeve; the two protective sleeves comprise bolt protective outer sleeves and nut protective outer sleeves; the bolt protective sleeve is sleeved on the connecting bolt, and the nut protective sleeve is sleeved on the nut body.
As a preferable scheme of the invention, the connecting bolt comprises a screwing end and a fixed screw, and the bolt protective sleeve is sleeved on the screwing end.
As a preferable scheme of the invention, a locking threaded hole is formed in one end of the fixing screw rod, which is far away from the nut body, a locking screw rod is installed in the internal thread of the locking threaded hole, and a locking end is arranged at a position of the locking screw rod, which is far away from the fixing screw rod.
As a preferable scheme of the invention, at least three locking ejector rods are arranged on one surface of the locking end close to the nut body in an annular array mode.
As a preferred scheme of the invention, an annular sliding groove is formed in the nut body at a position corresponding to the locking ejector rod, and after the locking screw is locked by the locking threaded hole, the end part of the locking ejector rod is arranged in the locking sliding groove.
As a preferable scheme of the invention, the bolt protective outer sleeve and the nut protective outer sleeve are both rubber plastic parts.
In a preferred embodiment of the present invention, the hardness and brittleness of the rubber-plastic part during production are controlled such that the rubber-plastic part automatically bursts after reaching a predetermined tightening force value.
In a preferred embodiment of the present invention, the bolt protective sheath after reaching the predetermined tightening force value is used as an indicative mark for quality inspection of the connecting bolt.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the bolt protective outer sleeve is sleeved on the connecting bolt, so that an anticorrosive coating on the surface of the connecting bolt cannot be damaged after the connecting bolt is screwed down, secondary maintenance work is basically not needed in the later period, and the maintenance cost can be saved to the greatest extent.
2. The cracking of the plastic protective sleeve is used as a qualified judgment basis for quality inspection, and the cracked rubber outer sleeve can be conveniently recycled, so that a large amount of manpower, material resources and production cost are saved.
3. The protection overcoat after splitting can not produce any change to the original structure and the size of bolt, avoids producing extra potential safety hazard in the use in later stage.
4. According to the invention, the connecting bolt is provided with the locking screw rod with the locking ejector rod, so that the nut body can be further locked by the locking ejector rod after the connecting bolt is fastened by the nut body, and the nut body is prevented from loosening in the long-term use process.
Drawings
FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a coupling bolt according to embodiment 1 of the present invention;
fig. 3 is a detailed structural diagram of a nut body according to embodiment 1 of the present invention;
FIG. 4 is a rear view of embodiment 1 of the present invention;
FIG. 5 is a schematic view of the overall structure of embodiment 2 of the present invention;
fig. 6 is a schematic structural diagram of embodiment 2 of the present invention.
In the figure: 1. a bolt protective sleeve; 2. a nut protective sleeve; 3. a connecting bolt; 301. screwing the end; 302. fixing the screw rod; 303. locking the threaded hole; 304. locking the screw rod; 305. a locking end; 306. locking the ejector rod; 307. locking the sliding chute; 4. the nut body.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Any one embodiment of the present invention is described below in conjunction with figures 1-6 for further illustration:
example 1: the invention provides a technical scheme that: a torque control type bolt and nut comprises a protective sleeve; the two protective sleeves comprise a bolt protective outer sleeve 1 and a nut protective outer sleeve 2; the bolt protective sleeve 1 is sleeved on the connecting bolt 3, and the nut protective sleeve 2 is sleeved on the nut body 4.
As a preferred embodiment of the present invention, the connecting bolt 3 includes a screwing end 301 and a fixing screw 302, and the bolt protecting sheath 1 is sleeved on the screwing end 301.
In a preferred embodiment of the present invention, the bolt protective sleeve 1 and the nut protective sleeve 2 are both made of rubber plastic.
In a preferred embodiment of the present invention, the hardness and brittleness of the rubber-plastic part during production are controlled such that the rubber-plastic part automatically bursts after reaching a predetermined tightening force value.
In a preferred embodiment of the present invention, the bolt protective sheath 1 after reaching the predetermined tightening force value is used as an indicator for quality inspection of the connecting bolt 3.
In this embodiment: this scheme is equipped with bolt protection overcoat 1 on connecting bolt 3 cover, bolt protection overcoat 1 after screwing predetermined power value has all fallen, in the testing process in later stage as long as simple observation rubber overcoat just falls, can carry out large batch bolt and nut detection at the same time, and twist off the nut and have more audio-visual effect, compare with the bolt that does not have the instruction type index, need not to twist the detection again in turn, also need not to do sampling test plan and detect the sample interval.
The split rubber jacket can be conveniently recycled as the basis for qualification inspection by adopting the split plastic protective sleeve, the recycled rubber jacket is processed and reused again, and compared with the traditional screw bolt which is unscrewed, the material cost can be saved by at least 20%, and the economic benefit is higher.
In addition, the rubber part cracks, the anticorrosive coating on the original surface of the connecting bolt 3 cannot be damaged, the corrosion resistance in the later stage of the connecting bolt 3 is not influenced, the connecting bolt 3 still serves as a complete independent body after the bolt protective outer sleeve 1 cracks, any change is not generated on the original structure and size of the connecting bolt 3, and extra potential safety hazards cannot be generated in the later-stage use process.
The bolt protective outer sleeve 1 and the nut protective outer sleeve 2 can protect the outdoor connecting bolt 3 and the nut body 4 from being damaged by surface anticorrosive treatment to the greatest extent, the problems that the surfaces of the connecting bolt 3 and the nut body 4 rust rapidly due to loss of a protective layer and the like are avoided, the whole service life of the connecting bolt 3 and the nut body 4 is prolonged, the service time of components and engineering projects is prolonged, and the economic cost of the project full life cycle is saved.
Example 2: a locking threaded hole 303 is formed in one end, far away from the nut body 4, of the fixing screw 302, a locking screw 304 is installed in the locking threaded hole 303 in a threaded manner, and a locking end 305 is arranged at a position, far away from the fixing screw 302, of the locking screw 304; at least three locking ejector rods 306 are arranged on one surface of the locking end 305 close to the nut body 4 in an annular array.
As a preferable scheme of the present invention, an annular sliding groove 307 is formed in a position of the nut body 4 corresponding to the locking push rod 306, and after the locking screw 304 is locked by the locking threaded hole 303, an end of the locking push rod 306 is disposed in the locking sliding groove 307.
In this embodiment: in the invention, the connecting bolt 3 is also provided with the locking screw 304 with the locking ejector rod 306, so that after the connecting bolt 3 is fastened by the nut body 4, the locking screw 304 is screwed into the locking threaded hole 303, and the locking ejector rod 306 plays a further role in locking and ejecting the nut body 4, thereby preventing the nut body 4 from loosening in the long-term use process.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a moment control type bolt and nut which characterized in that: comprises a protective sleeve; the two protective sleeves are arranged and comprise bolt protective outer sleeves (1) and nut protective outer sleeves (2); the bolt protective outer sleeve (1) is sleeved on the connecting bolt (3), and the nut protective outer sleeve (2) is sleeved on the nut body (4).
2. A torque-controlled bolt and nut as defined in claim 1, wherein: the connecting bolt (3) comprises a screwing end (301) and a fixing screw rod (302), and the bolt protective outer sleeve (1) is sleeved on the screwing end (301).
3. A torque-controlled bolt and nut as defined in claim 2, wherein: the nut is characterized in that a locking threaded hole (303) is formed in one end, far away from the nut body (4), of the fixing screw rod (302), a locking screw rod (304) is installed on the internal thread of the locking threaded hole (303), and a locking end (305) is arranged on the position, far away from the fixing screw rod (302), of the locking screw rod (304).
4. A torque-controlled bolt and nut as defined in claim 3, wherein: at least three locking ejector rods (306) are arranged on one surface, close to the nut body (4), of the locking end (305) in an annular array mode.
5. A torque-controlled bolt and nut as defined in claim 1, wherein: an annular sliding groove (307) is formed in the position, corresponding to the locking ejector rod (306), of the nut body (4), and when the locking screw (304) is locked in the locking threaded hole (303), the end portion of the locking ejector rod (306) is arranged in the locking sliding groove (307).
6. A torque-controlled bolt and nut as defined in claim 1, wherein: the bolt protective outer sleeve (1) and the nut protective outer sleeve (2) are both rubber plastic parts.
7. A torque-controlled bolt and nut as defined in claim 6, wherein: and after the rubber plastic part reaches a preset screwing force value, the rubber plastic part automatically bursts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110287985.0A CN113062912A (en) | 2021-03-17 | 2021-03-17 | Moment control type bolt and nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110287985.0A CN113062912A (en) | 2021-03-17 | 2021-03-17 | Moment control type bolt and nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113062912A true CN113062912A (en) | 2021-07-02 |
Family
ID=76561303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110287985.0A Pending CN113062912A (en) | 2021-03-17 | 2021-03-17 | Moment control type bolt and nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113062912A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113776798A (en) * | 2021-08-23 | 2021-12-10 | 东风汽车集团股份有限公司 | Device and method for testing correlation between bolt tightening times and corrosion resistance |
-
2021
- 2021-03-17 CN CN202110287985.0A patent/CN113062912A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113776798A (en) * | 2021-08-23 | 2021-12-10 | 东风汽车集团股份有限公司 | Device and method for testing correlation between bolt tightening times and corrosion resistance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113062912A (en) | Moment control type bolt and nut | |
| CN204694393U (en) | A kind of screw torque force checking device | |
| CN204594801U (en) | A kind of Brazilian disc end face diametral compression test fixture | |
| CN203236432U (en) | Track shoe replacing tool | |
| CN211955325U (en) | Porcelain insulator crack detection device | |
| CN213331935U (en) | Detachable bolt for electric power facility | |
| CN212003889U (en) | Inner hexagonal and outer hexagonal screw | |
| CN219865836U (en) | Corrosion-resistant bolt assembly for aircraft engine pylon | |
| CN203672725U (en) | Torsional shear type high-strength bolt fastening and pretension force testing device | |
| CN205908608U (en) | Improve square nut that forms by tensile round nut | |
| CN203894040U (en) | Apparatus for detecting fastening occlusion case of large-scale bolt and large-scale nut | |
| CN212779054U (en) | Hexagonal rod detection tool | |
| CN219633689U (en) | Fan blade bolt disassembling tool | |
| CN201843579U (en) | Fixing screw cap for hand wheel of valve of Christmas tree | |
| CN201666302U (en) | Passive theftproof bolt and nut | |
| CN204982043U (en) | Self -align automation compresses tightly into electric subassembly device | |
| CN219673057U (en) | Screw rust-proof hexagonal nut | |
| CN205552373U (en) | Novel bolt fastening spanner | |
| CN203863578U (en) | Tool facilitating screw assembly | |
| CN205609227U (en) | Reactor pressure vessel connection structure | |
| CN111927868B (en) | Anti-theft bolt capable of being screwed up twice | |
| CN203743170U (en) | Antitheft bolt of transmission tower | |
| CN210081620U (en) | Repeatedly usable's disk seat extractor | |
| CN219918304U (en) | Pipeline connection protection device | |
| CN215394930U (en) | High pressure water injection flow water gauge extracting tool |
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 |