CN114087267B - Split nested single-side bolt - Google Patents
Split nested single-side bolt Download PDFInfo
- Publication number
- CN114087267B CN114087267B CN202111236974.6A CN202111236974A CN114087267B CN 114087267 B CN114087267 B CN 114087267B CN 202111236974 A CN202111236974 A CN 202111236974A CN 114087267 B CN114087267 B CN 114087267B
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- Prior art keywords
- mounting
- fan ring
- diameter part
- main screw
- mounting hole
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- 238000003780 insertion Methods 0.000 claims abstract description 13
- 230000037431 insertion Effects 0.000 claims abstract description 13
- 238000009434 installation Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 230000007774 longterm Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 20
- 239000010959 steel Substances 0.000 description 20
- 241000446313 Lamella Species 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 1
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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
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
- F16B13/066—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like
- F16B13/068—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like expanded in two or more places
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a split nested unilateral bolt, which comprises a gasket, a nut, a mounting ring, four mounting rods and four fan ring segments, wherein the four fan ring segments are arranged on the gasket; the large diameter part of each fan ring valve is positioned outside the front opening of the mounting hole, the small diameter part of each fan ring valve is positioned in the mounting hole, the front end of each mounting rod is in threaded connection with the rear part of a corresponding fan ring valve, and the rear ends of the four mounting rods are connected with the mounting rings; the mounting ring is positioned at the outer side of the rear opening of the mounting hole; an insertion gap is formed between every two adjacent fan ring segments; the bolt also comprises a main screw, wherein the rear section of the main screw is sleeved with a gasket and screwed with a nut; the front section of the main screw rod is in sliding fit with sliding blocks, and a front convex stay is arranged on the outer side of each sliding block; the front end of each chute is fixedly provided with a lifting head for lifting the stay to radially open the fan ring valve; the front end of the large-diameter part of each fan ring petal is provided with a bayonet; the four mounting rods are in sliding fit with a sliding sleeve, and four inserting rods for extruding into four inserting slits are arranged at the front end of the sliding sleeve. The bolt can avoid loosening after long-term service.
Description
Technical Field
The invention relates to the technical field of steel structure construction, in particular to a split nested unilateral bolt for connecting different steel members.
Background
In the construction process of steel structure buildings or structures, adjacent steel members such as steel columns, steel beams, steel floors and the like are often required to be connected and fastened, and conventionally, bolts are used for penetrating two connecting steel plates of two adjacent steel members to be connected in a threaded manner. When a conventional bolt is installed, two groups of personnel are generally required to work cooperatively on two sides of a connecting steel plate, one clamping the head of the bolt, and the other screwing a nut; thus, the labor cost is high; in addition, special situations that people cannot stand on the other side are frequently encountered in steel structure construction, for example, the other side is a cavity in the middle of a steel upright post, and therefore the conventional bolt is limited in installation and use.
Of course, split nested bolts capable of being installed on one side have been developed, such as a patent with the patent number of CN201310660709X and the name of a split nested type unilateral bolt fastener; the bolt of this patent is divided into a plurality of subassemblies, for example the bolt that the head passed the mounting hole, divide into the nest of four fan ring lamella etc. when using, passes the mounting hole of connecting steel sheet with bolt head and each fan ring lamella in batches, closes four fan ring lamella into complete annular nest for with the bolt head card at the mounting hole inboard drill way of connecting steel sheet, screw the nut from the mounting hole outside again.
The above structure realizes single-side installation, but still has the disadvantage. The bolts, the annular nest and the wall of the mounting hole are weak in circumferential limitation, lack of anchoring, and can slide circumferentially after long-term service, so that the bolts are loose, and potential safety hazards exist.
Disclosure of Invention
The invention aims to solve the technical problem of providing the split nested unilateral bolt which can strengthen circumferential limitation of the bolt, the annular nest and the wall of the mounting hole, thereby avoiding loosening of the bolt after long-term service.
The technical scheme of the invention is that a split nested unilateral bolt is provided, which comprises a gasket, a nut, a mounting ring, four mounting rods and four fan ring segments; each fan ring petal comprises a large-diameter part, a small-diameter part and a step surface between the large-diameter part and the small-diameter part; the large diameter part is positioned outside the front opening of the mounting hole, the small diameter part is positioned in the mounting hole, and the step surface is clamped at the front opening of the mounting hole; the front end of each mounting rod is in threaded connection with the rear part of a corresponding sector ring petal, and the rear ends of the four mounting rods are connected with the mounting rings; the mounting ring is positioned at the outer side of the rear opening of the mounting hole; an insertion gap is formed between every two adjacent fan ring segments; the bolt also comprises a main screw, the rear section of the main screw extends out of the rear opening of the mounting hole, and the rear section of the main screw is an external thread section for sleeving the gasket and screwing the screw cap; the front section of the main screw is provided with four sliding grooves with T-shaped sections, each sliding groove is internally and slidably matched with a T-shaped sliding block, and the outer side of each sliding block is provided with a forward convex stay; the front end of each chute is fixedly provided with a lifting head for lifting the stay to radially open the fan ring valve; the front end of the large-diameter part of each fan ring petal is provided with a bayonet used for clamping the rear end of the stay; the four mounting rods are in sliding fit with a sliding sleeve, and four inserting rods for extruding into four inserting slits are arranged at the front end of the sliding sleeve.
Compared with the prior art, the split nested unilateral bolt with the structure has the following advantages.
The process of installing the bolt is first analyzed.
The workers stand at the rear side of the mounting hole all the time; respectively holding four mounting rods, enabling four fan ring petals to pass through the mounting holes one by one from back to front, placing a main screw rod with a stay between the four mounting rods, sleeving a sliding sleeve with the four mounting rods at the same time, and fixing the rear ends of the four mounting rods with the mounting rings; thus, at the front side of the mounting hole, the four fan ring petals form a semi-closed nest with four insertion slits;
the main screw rod passes through the mounting hole and the semi-closed nest from back to front, and the four stay bars just pass through the four insertion slits; after the four support bars are positioned at the front end of the nesting, the main screw is rotated for 45 degrees, so that the four support bars just face the four bayonet openings of the four fan ring segments, the main screw is pulled backwards, the rear ends of the support bars are blocked by the bayonet openings and cannot retreat, and the lifting heads move backwards along with the main screw so as to lift the corresponding support bars, thus the four support bars are lifted to expand radially outwards, the four fan ring segments are propped radially outwards, and the four fan ring segments are expanded to tightly cover the wall of the mounting hole;
the sliding sleeve is pushed forward, and as the four fan ring petals are radially spread at the moment, the insertion gaps among the fan ring petals are slightly enlarged along with the fan ring petals, so that the four inserted rods of the sliding sleeve are just hard extruded into the corresponding four insertion gaps; thus, the four inserted bars and the four fan ring petals which are mutually interfered together form a totally-enclosed whole-circle nest, and the nest and the wall of the mounting hole are in interference expansion;
and (3) sleeving a gasket on the external thread section of the rear opening of the main screw extending out of the mounting hole, screwing in a nut, and screwing and fastening the two connecting plates of the two steel members.
From the above analysis, it can be seen that; on the basis of keeping the traditional performance of unilateral installation, the unilateral bolt utilizes four inserted bars and four fan ring petals which are mutually interfered to form a totally-enclosed whole-circle nest together, the nest and the wall of the installation hole are in interference expansion and are tightly combined, and four stays of the main screw are also clamped in four bayonets of the whole-circle nest, so that the anchoring is tight and reliable between the main screw and the whole-circle nest and between the whole-circle nest and the wall of the installation hole, circumferential sliding does not exist, the bolt can not loosen even if the bolt is in service for a long time, and potential safety hazards are avoided.
Preferably, the rear end of the main screw is in threaded connection with an auxiliary screw; the auxiliary screw rod has the functions of firstly serving as an extension part of the main screw rod, so that the auxiliary screw rod is convenient to grasp by a worker, and then the worker can easily and conveniently push the main screw rod and each stay forward through the mounting hole by grasping the auxiliary screw rod; the main screw rod is also convenient to rotate for 45 degrees so as to clamp the rear end of the stay with the bayonet of the fan ring flap; secondly, the rear end of the auxiliary screw rod protrudes backwards to form a sliding sleeve and a mounting ring, so that the auxiliary screw rod is convenient to clamp firmly by a clamp, and further is convenient to pull backwards by exerting force, and the four clamped supporting strips radially expand and tighten the fan ring valve and the wall of the mounting hole; thirdly, when the nut is screwed, although the wall of the main screw rod, the whole circle nest and the wall of the mounting hole are radially limited, if the force for screwing the nut is too large, the nut can still be loosened, so that a worker clamps the auxiliary screw rod by using the clamp, and unexpected loosening of the main screw rod and the whole circle nest in the screwing process of the nut can be avoided.
As a further preferable mode, the front end of the stay is provided with a lifting surface which is matched with the lifting head; like this, when pulling the main screw rod backward, four stays are by bayonet joint unable backing up, so the stay front end can be pushed the lifting by the lifting head of main screw rod, and the stay front end contact surface also designs into anastomotic lifting face, can further guide the lifting process, also makes the lifting prop up the process of stay more smooth and easy.
Drawings
Fig. 1 is a schematic structural view of a stay of a split nested single-sided bolt before being spread.
Fig. 2 is a schematic structural view of the split nested single-sided bolt of the present invention with the main shank of the bolt passing forward through the semi-closed nest.
Fig. 3 is a schematic structural view of the stay of the split nested unilateral bolt after being spread.
Fig. 4 is a schematic view of the split nested single-sided bolt of the present invention assembled in two steel webs, both of which are partially semi-sectioned for ease of illustration.
Fig. 5 is a schematic structural view of a slider and a stay of the split nested single-sided bolt of the present invention.
FIG. 6 is a schematic cross-sectional view of the main shank of the split nested single-sided bolt of the present invention, taken from the middle.
1, a gasket, 2, a nut, 3, a mounting ring, 4, a mounting rod, 5, a fan ring flap, 5.1, a large diameter part, 5.2, a small diameter part, 5.3, a step surface, 6, a mounting hole, 7, slot, 8, main screw, 9, chute, 10, slider, 11, stay, 11.1, lifting surface, 12, lifting head, 13, bayonet, 14, sliding sleeve, 15, inserted link, 16, auxiliary screw.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
As shown in fig. 1 to 6, the split nested unilateral bolt comprises a gasket 1, a nut 2, a mounting ring 3, four mounting rods 4 and four fan ring segments 5. Each sector ring flap 5 comprises a large diameter part 5.1, a small diameter part 5.2 and a step surface 5.3 positioned between the large diameter part 5.1 and the small diameter part 5.2; the large diameter part 5.1 is positioned at the outer side of the front opening of the mounting hole 6, the small diameter part 5.2 is positioned in the mounting hole 6, and the step surface 5.3 is clamped at the front opening of the mounting hole 6. The mounting hole 6 of the application is that two steel connecting plates of two steel members to be connected are respectively provided with two sections of mounting hole sections, and the two sections of mounting hole sections are aligned and communicated to jointly construct the mounting hole 6 of the application.
The front end of each mounting rod 4 is in threaded connection with the rear part of the corresponding sector ring petal 5, namely, the front end of the mounting rod 4 is provided with external threads, the rear end face of the small diameter part 5.1 of the sector ring petal 5 is provided with an internal threaded hole, and the front end of the mounting rod 4 is in threaded engagement with the internal threaded hole at the rear end of the sector ring petal 5. The rear ends of the four mounting rods 4 are connected with the mounting ring 3; namely, the mounting ring 3 is provided with four through holes, and the rear ends of the four mounting rods 4 are sleeved in the four through holes in a sliding way. The mounting ring 3 is positioned outside the rear opening of the mounting hole 6; of course, the worker stands on the rear side of the mounting hole 6 all the time.
An insertion gap 7 is formed between every two adjacent fan ring segments 5; i.e. four slits 7 are present between the four fan ring segments 5. The four sector ring flaps 5 form a semi-closed nest with four slits 7.
The bolt further comprises a main screw rod 8, four sliding grooves 9 with T-shaped cross sections are arranged at the front section of the main screw rod 8, a sliding block 10 with T-shaped cross sections is slidably matched in each sliding groove 9, and a forward protruding supporting bar 11 is arranged on the outer side of each sliding block 10, namely the supporting bar 11 protrudes forward from the sliding block 10 where the supporting bar 11 is located. The front end of each chute 9 is fixed with a lifting head 12 for lifting the stay 11 to enable the stay 11 to radially open the fan ring valve 5; the lifting head 12 is fixed with the main screw rod 8; the stay 11 is in a transverse initial state, and the front end of the stay 11 is provided with a lifting surface 11.1 which is matched with the lifting head 12.
The front end of the large diameter part 5.1 of each fan ring petal 5 is provided with a bayonet 13 for clamping the rear end of a corresponding stay 11.
The four mounting bars 4 are slidably fitted with a sliding sleeve 14, i.e. the sliding sleeve 14 is perforated with four through holes, and the sliding sleeve 14 is slidably fitted with the four mounting bars by means of the four through holes. The front end of the sliding sleeve 14 is provided with four inserting rods 15 which are used for extruding into the four inserting slits 7.
The rear section of the main screw rod 8 extends out of the rear opening of the mounting hole 6, and the rear section of the main screw rod 8 is an external thread section for sleeving the gasket 1 and screwing the screw cap 2; the rear end of the main screw rod 8 is also connected with an auxiliary screw rod 16 in a screw manner.
The worker holds the auxiliary screw 16, passes the main screw 8, the sliding block 10 and the stay 11 through the mounting hole 6 from back to front and is nested in a semi-closed manner, and the four stays 11 just pass through the four insertion slits 7; the main screw rod 8 is rotated for 45 degrees through the auxiliary bolt 16 and pulled back, so that the rear ends of the four stays 11 are clamped into the bayonets 13 corresponding to the fan ring segments 5; continuing to pull the main screw rod 8 backwards so that the four stay bars 11 are spread outwards in the radial direction by the lifting heads 12 at the front end of the main screw rod 8; the four fan ring petals 5 are supported by the connecting belt, so that the four fan ring petals 5 expand the wall of the mounting hole 6; while the four fan ring segments 5 are radially spread, the insertion slits 7 between the fan ring segments 5 are slightly enlarged along with the radial spread, and the sliding sleeve 14 is pushed forward so that the four insertion rods 15 of the sliding sleeve 14 are just hard extruded into the corresponding four insertion slits 7; thus, the four inserted bars 15 and the four fan ring segments 5 which are mutually interfered together form a totally-enclosed whole-circle nest, and the nest and the wall of the mounting hole 6 are in interference expansion; finally, the main screw rod 8 extends out of the external thread section of the rear opening of the mounting hole 6, the gasket 1 is sleeved, the screw cap 2 is screwed, and the two steel connecting plates of the two steel members are screwed and fastened.
Claims (2)
1. A split nested unilateral bolt comprises a gasket (1), a nut (2), a mounting ring (3), four mounting rods (4) and four fan ring segments (5); each fan ring flap (5) comprises a large-diameter part (5.1), a small-diameter part (5.2) and a step surface (5.3) between the large-diameter part and the small-diameter part; the large-diameter part (5.1) is positioned at the outer side of the front opening of the mounting hole (6), the small-diameter part (5.2) is positioned in the mounting hole (6), and the step surface (5.3) is clamped at the front opening of the mounting hole (6); the front end of each mounting rod (4) is in threaded connection with the rear part of a corresponding sector ring petal (5), and the rear ends of the four mounting rods (4) are connected with the mounting ring (3); the mounting ring (3) is positioned at the outer side of the rear opening of the mounting hole (6); the method is characterized in that: an insertion slot (7) is formed between every two adjacent fan ring segments (5); the bolt also comprises a main screw rod (8), wherein the rear section of the main screw rod (8) extends out of the rear opening of the mounting hole (6), and the rear section of the main screw rod (8) is an external thread section for sleeving the gasket (1) and screwing the screw cap (2); four sliding grooves (9) with T-shaped cross sections are arranged at the front section of the main screw (8), a T-shaped sliding block (10) is slidably matched with each sliding groove (9), and a front convex stay (11) is arranged at the outer side of each sliding block (10); the front end of each chute (9) is fixedly provided with a lifting head (12) for lifting the stay (11) to radially open the fan ring segments (5); the front end of the large diameter part (5.1) of each fan ring flap (5) is provided with a bayonet (13) for clamping the rear end of the stay (11); the four mounting rods (4) are in sliding fit with a sliding sleeve (14), and four inserting rods (15) for extruding into the four inserting slits (7) are arranged at the front end of the sliding sleeve (14);
an auxiliary screw rod (16) is connected with the rear end of the main screw rod (8) in a screw manner;
during installation, a worker holds the auxiliary screw (16), the main screw (8), the sliding block (10) and the stay bars (11) pass through the installation holes (6) and the semi-closed nest from back to front, and the four stay bars (11) just pass through the four insertion slits (7); and then the main screw rod (8) is rotated for 45 degrees through the auxiliary bolt (16) and pulled back, so that the rear ends of the four stays (11) are clamped into the bayonets (13) corresponding to the fan ring segments (5).
2. The split nested single-sided bolt of claim 1, wherein: the front end of the stay (11) is provided with a lifting surface (11.1) which is matched with the lifting head (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111236974.6A CN114087267B (en) | 2021-10-24 | 2021-10-24 | Split nested single-side bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111236974.6A CN114087267B (en) | 2021-10-24 | 2021-10-24 | Split nested single-side bolt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114087267A CN114087267A (en) | 2022-02-25 |
| CN114087267B true CN114087267B (en) | 2023-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111236974.6A Active CN114087267B (en) | 2021-10-24 | 2021-10-24 | Split nested single-side bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114087267B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671447B (en) * | 2013-12-10 | 2015-07-29 | 同济大学 | A kind of split Nested-type single-side bolt fastener |
| DE102018119075A1 (en) * | 2018-08-06 | 2020-02-06 | Fischerwerke Gmbh & Co. Kg | expansion anchor |
| CN211288374U (en) * | 2019-08-14 | 2020-08-18 | 扬州市森林汽车零部件有限公司 | Expansion bolt |
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2021
- 2021-10-24 CN CN202111236974.6A patent/CN114087267B/en active Active
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| Publication number | Publication date |
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| CN114087267A (en) | 2022-02-25 |
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