CN114658739A - Long-circular-hole friction type one-way T-shaped high-strength bolt and using method thereof - Google Patents
Long-circular-hole friction type one-way T-shaped high-strength bolt and using method thereof Download PDFInfo
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- CN114658739A CN114658739A CN202210354603.6A CN202210354603A CN114658739A CN 114658739 A CN114658739 A CN 114658739A CN 202210354603 A CN202210354603 A CN 202210354603A CN 114658739 A CN114658739 A CN 114658739A
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- cap
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000009434 installation Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 description 17
- 239000010959 steel Substances 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003466 welding Methods 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
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B1/5806—Connections for building structures in general of bar-shaped building elements with a cross-section having an open profile
- E04B1/5812—Connections for building structures in general of bar-shaped building elements with a cross-section having an open profile of substantially I - or H - form
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B1/5825—Connections for building structures in general of bar-shaped building elements with a closed cross-section
- E04B1/5831—Connections for building structures in general of bar-shaped building elements with a closed cross-section of substantially rectangular form
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2418—Details of bolting
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2454—Connections between open and closed section profiles
Abstract
The invention discloses a long-hole friction type one-way T-shaped high-strength bolt which comprises a T-shaped bolt cap, wherein a bolt rod is connected onto the T-shaped bolt cap, a hexagonal bolt fixed end is fixedly connected to one end, away from the T-shaped bolt cap, of the bolt rod, a hexagonal nut in threaded connection with the bolt rod is sleeved on the bolt rod, and a bolt cap orientation mark is fixedly connected to one end, away from the bolt rod, of the hexagonal bolt fixed end; the invention also discloses a use method of the long round hole type friction type one-way T-shaped high-strength bolt, which comprises the following steps: s1, extending the T-shaped bolt cap into the closed connecting plate through the oblong hole; and S2, determining that the T-shaped bolt cap is perpendicular to the long round hole through the orientation mark of the bolt cap. The invention can solve the connection problem of the closed connecting plate, and the long round hole type friction type unidirectional T-shaped high-strength bolt connection pair has simple structure and excellent performance, and can meet the requirements of safe and reliable connection of the closed connecting plate, convenient installation, strong manufacturability and high installation speed.
Description
Technical Field
The invention relates to the technical field of steel structural member connection, in particular to a long round hole type friction type one-way T-shaped high-strength bolt and a using method thereof.
Background
The prefabricated building refers to a building which is produced by producing components in a factory and assembling and connecting the components at a construction site. The assembled steel structure building saves resources and energy, reduces pollution, effectively improves labor production efficiency, improves engineering quality and greatly shortens construction period. In recent years, the national continuous issue requires the vigorous development of fabricated buildings.
When the fabricated steel structure buildings are connected on site, bolts are used for splicing on site, and the existing bolt form is roughly divided into a double-side fastening bolt and a single-side fastening bolt. Unidirectional bolts can fasten and connect members having a closed cross section from one side, and square steel pipes and round pipe members having a closed cross section are widely used in steel structure buildings.
The development of single-sided bolts began in the 80's of the 20 th century, foreign single-sided Bolt products such as Hollo-Bolt and Blind-Bolt in the United kingdom, Boxbolt and Ultra-Twist in the United states, One-Side-Fastener in Australia, TCBB in Japan, and the like. Domestic unilateral bolt products such as self-locking unilateral fastening bolt, spring-open unilateral bolt fastener, pull-bracing unilateral bolt fastener, rotary closed unilateral bolt fastener, umbrella type expansion bolt fastener and rotary type expansion bolt fastener.
The single-side self-locking bolt is inserted into the closed cross section, and the fixing device is extended in the single-side self-locking bolt to realize fixing and locking at the outside to finish installation. The unilateral self-locking bolt in the beam-column unilateral bolt connection node has the self-tightening function, a mounting hand hole does not need to be formed, welding is not needed, the construction efficiency is high, the maximum diameter of the unilateral self-locking bolt developed in the prior art can reach M39, but the unilateral bolt is complex to manufacture and high in production cost, the manufacturing material of the unilateral anchoring part not only needs enough strength, but also needs to meet the requirement of fastening deformation, in the unilateral bolt test, the anchoring part is easy to damage, the anti-sliding capability of the unilateral bolt is poor, and the energy consumption capability of the connection node is lower than that of a high-strength bolt connection node. To being connected of closed steel-pipe column and girder steel, develop one kind can install fast convenient, carry out one-way connection from the outside, can guarantee to connect safe and reliable's novel one-way bolt simultaneously again, be a problem that awaits the solution urgently.
Therefore, a long round hole type friction type one-way T-shaped high-strength bolt and a using method thereof are designed.
Disclosure of Invention
The invention aims to provide a long round hole type friction type one-way T-shaped high-strength bolt and a using method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the long round hole type friction type unidirectional T-shaped high-strength bolt comprises a T-shaped bolt cap, wherein a bolt rod is connected to the T-shaped bolt cap, one end, far away from the T-shaped bolt cap, of the bolt rod is fixedly connected with a hexagon bolt fixed end, the bolt rod is sleeved with a hexagon nut in threaded connection with the bolt rod, and one end, far away from the bolt rod, of the hexagon bolt fixed end is fixedly connected with a bolt cap orientation mark.
Preferably, the T-shaped bolt cap is in a long strip shape, and the width of the T-shaped bolt cap is the same as the diameter of the bolt rod.
Preferably, the outside cover of hexagonal bolt stiff end is equipped with the lantern ring, the inner wall of the lantern ring is the hexagon setting, the inner wall of the lantern ring offsets and matches the setting with the outer wall of hexagonal bolt stiff end, the outer wall cover of the lantern ring is equipped with the sleeve pipe, the sleeve pipe cover is in hexagon nut's outside setting, be equipped with stop gear between sleeve pipe and the lantern ring.
Preferably, the inner wall part of the sleeve is a hexagonal prism-shaped part which is sleeved outside the hexagonal nut and is matched with the hexagonal prism-shaped part, and the cylindrical part of the sleeve is sleeved on the outer wall of the sleeve ring and is connected in a rotating mode.
Preferably, the outer wall of the sleeve is hexagonal prism-shaped.
Preferably, stop gear is including setting up the annular groove on the lantern ring outer wall, install the annular rack board in the annular groove, two sheathed tube inner wall fixedly connected with locating pieces, two install the stopper of rotating the connection between the locating piece, the stopper offsets with the annular rack board.
Preferably, the two positioning blocks are rotatably connected with a shaft rod, the limiting blocks are arranged on the shaft rod, and torsion springs are arranged between the limiting blocks and the positioning blocks.
The invention also discloses a use method of the long round hole type friction type one-way T-shaped high-strength bolt, which comprises the following steps:
s1, extending the T-shaped bolt cap into the closed connecting plate through the long round hole;
s2, rotating the bolt rod, and determining that the T-shaped bolt cap is vertical to the long circular hole through the directional mark of the bolt cap;
and S3, clamping the fixed end of the hexagon bolt by using a spanner, and fastening the hexagon nut by using another spanner to ensure that the applied pretension force reaches the pulling force required by the connection design, thereby completing the installation.
The invention has the beneficial effects that:
the invention can solve the connection problem of the closed connecting plate, and the long round hole type friction type unidirectional T-shaped high-strength bolt connection pair has simple structure and excellent performance, and can meet the requirements of safe and reliable connection of the closed connecting plate, convenient installation, strong manufacturability and high installation speed.
Drawings
Fig. 1 is a schematic structural view of a long round hole friction type unidirectional T-shaped high-strength bolt provided in example 1;
fig. 2 is an exploded view of an oblong hole friction type unidirectional T-shaped high-strength bolt proposed in example 1;
fig. 3 is a schematic structural view of a long round hole friction type unidirectional T-shaped high-strength bolt provided in example 2;
fig. 4 is a schematic structural view of a position a in the long round hole friction type unidirectional T-shaped high-strength bolt provided in example 2;
fig. 5 is a partial side sectional view of an elongated round hole friction type one-way T-shaped high-strength bolt proposed in example 2;
fig. 6 is a schematic structural view of a use method of a long round hole friction type one-way T-shaped high-strength bolt provided by the invention;
FIG. 7 is a disassembled view of a method for using the long round hole type friction type one-way T-shaped high-strength bolt provided by the invention;
FIG. 8 is an assembly diagram of a method of using a long round hole friction type unidirectional T-shaped high-strength bolt according to the present invention;
fig. 9 is a partial schematic view of a use method of a long round hole friction type one-way T-shaped high-strength bolt provided by the invention.
In the figure: the bolt comprises a 1T-shaped bolt cap, a 2 bolt rod, a 3 hexagonal nut, a 4 hexagonal bolt fixed end, a 5 bolt cap orientation mark, a 6 square steel pipe column, a 7H-shaped steel beam, 8 long round holes, 9 end plates, 10 sleeves, 11 lantern rings, 12 annular grooves, 13 annular rack plates, 14 torsion springs, 15 limiting blocks, 16 positioning blocks and 17 shaft rods.
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.
Example 1
Referring to fig. 1-2 and 6-9, the long round hole type friction type unidirectional T-shaped high-strength bolt comprises a T-shaped bolt cap 1, a bolt rod 2 is connected onto the T-shaped bolt cap 1, a hexagonal bolt fixing end 4 is fixedly connected to one end, far away from the T-shaped bolt cap 1, of the bolt rod 2, a hexagonal nut 3 in threaded connection with the bolt rod 2 is sleeved on the bolt rod 2, a bolt cap orientation mark 5 is fixedly connected to one end, far away from the bolt rod 2, of the hexagonal bolt fixing end 4, the T-shaped bolt cap 1 is in a long strip shape, and the width of the T-shaped bolt cap 1 is the same as the diameter of the bolt rod 2.
In the embodiment, the connection problem of the closed connecting plate can be solved, the long round hole type friction type unidirectional T-shaped high-strength bolt connection pair is simple in structure and excellent in performance, and the requirements of safe and reliable connection of the closed connecting plate, convenience in installation, strong manufacturability and high installation speed can be met.
Example 2
Referring to fig. 3-5, the difference between this embodiment and embodiment 1 is that the exterior of the hexagon bolt fixing end 4 is sleeved with a lantern ring 11, the inner wall of the lantern ring 11 is arranged in a hexagon shape, the inner wall of the lantern ring 11 is abutted against and matched with the outer wall of the hexagon bolt fixing end 4, the outer wall of the lantern ring 11 is sleeved with a sleeve 10, the outer wall of the sleeve 10 is arranged in a hexagonal prism shape, the inner wall of the sleeve 10 is cylindrical, the hexagonal prism shape in the sleeve 10 is sleeved outside and matched with the hexagon nut 3, and the cylindrical shape of the sleeve 10 is sleeved on the outer wall of the lantern ring 11 and is rotatably connected.
After the hexagon nut 3 is arranged and fastened on the bolt rod 2, the sleeve 10 is sleeved outside the hexagon nut 3 on the bolt rod 2, and then the lantern ring 11 is rotated, so that the lantern ring 11 can be sleeved outside the hexagon bolt fixed end 4; the hexagonal nut 3 is rotated along the same direction as the fastening direction, namely the hexagonal nut 3 can be rotated and fastened by rotating the sleeve 10, and at the moment, the limiting block 15 and the annular rack plate 13 move relatively, so that the limiting block 15 can be reset under the action of the torsion spring 14; when hexagonal nut 3 is rotated to the counter-potential, sleeve pipe 10 is rotated to the counter-potential promptly, and stopper 15 offsets with annular rack board 13 this moment, can't rotate sleeve pipe 10, so can carry on spacingly to hexagonal nut 3 through sleeve pipe 10, makes hexagonal nut 3 can not become flexible, guarantees the stability after the fastening.
The invention also discloses a use method of the slotted hole type friction type one-way T-shaped high-strength bolt, which comprises the following steps of:
s1, extending the T-shaped bolt cap 1 into the closed connecting plate through the long round hole;
s2, rotating the bolt rod 2, and determining that the T-shaped bolt cap 1 is perpendicular to the long circular hole through the bolt cap orientation mark 5;
and S3, clamping the fixed end 4 of the hexagon bolt by using a spanner, and fastening the hexagon nut 3 by using another spanner to ensure that the applied pretension force reaches the pulling force required by the connection design, thereby completing the installation.
The use method of the T-shaped high-strength bolt is specifically described as follows:
in the installation process, for example, the square steel pipe column 6 and the H-shaped steel beam 7 are connected, firstly, the square steel pipe column 6 and the H-shaped steel beam 7 are installed in place, wherein the end plate 9 is welded to the end plate of the H-shaped steel beam 7, long round holes 8 are formed in the square steel pipe column 6 and the end plate 9 in advance, and as shown in fig. 7, in the installation method, the T-shaped bolt caps 1 are inserted into the long round holes 8 in parallel; then, the bolt bar 2 is rotated, and the T-shaped bolt cap 1 is determined to be vertical to the long round hole 8 through the bolt cap orientation mark 5; a wrench is used for clamping the fixed end 4 of the main hexagon bolt, and the hexagon nut 3 is fastened through another wrench, so that the applied pretension force reaches the pulling force required by the connection design, as shown in fig. 8, the long-circular friction type one-way T-shaped high-strength bolt connection pair is applied to the connection and fastening of the square steel pipe column 6 and the H-shaped steel beam 7; as shown in fig. 9, inside the square steel pipe column 6, the T-bolt caps 1 are perpendicular to the oblong holes 8.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The long round hole type friction type unidirectional T-shaped high-strength bolt comprises a T-shaped bolt cap (1) and is characterized in that a bolt rod (2) is connected onto the T-shaped bolt cap (1), one end of the bolt rod (2) far away from the T-shaped bolt cap (1) is fixedly connected with a hexagonal bolt fixed end (4), a hexagonal nut (3) in threaded connection with the bolt rod (2) is sleeved on the bolt rod (2), and one end of the hexagonal bolt fixed end (4) far away from the bolt rod (2) is fixedly connected with a bolt cap orientation mark (5).
2. A slotted friction one-way T-shaped high-strength bolt according to claim 1, characterized in that said T-shaped bolt cap (1) is elongated and the width of said T-shaped bolt cap (1) is the same as the diameter of the bolt shank (2).
3. The long round friction type one-way T-shaped high-strength bolt is characterized in that a sleeve ring (11) is sleeved outside the hexagon bolt fixing end (4), the inner wall of the sleeve ring (11) is arranged in a hexagon shape, the inner wall of the sleeve ring (11) is abutted to and matched with the outer wall of the hexagon bolt fixing end (4), a sleeve (10) is sleeved on the outer wall of the sleeve ring (11), the sleeve (10) is sleeved outside the hexagon nut (3), and a limiting mechanism is arranged between the sleeve (10) and the sleeve ring (11).
4. A slotted friction one-way T-shaped high-strength bolt according to claim 3, wherein the inner wall of said sleeve (10) is hexagonal prism-shaped, the hexagonal prism-shaped part in said sleeve (10) is sleeved outside the hexagonal nut (3) and is arranged in a matching way, and the cylindrical part of said sleeve (10) is sleeved on the outer wall of the sleeve ring (11) and is connected in a rotating way.
5. A slotted friction one-way T high-strength bolt according to claim 3, characterized in that the outer wall of said sleeve (10) is hexagonal prism shaped.
6. A long round hole type friction type one-way T-shaped high-strength bolt according to claim 3, wherein the limiting mechanism comprises an annular groove (12) arranged on the outer wall of the lantern ring (11), an annular rack plate (13) is installed in the annular groove (12), two positioning blocks (16) are fixedly connected to the inner wall of the sleeve (10), a limiting block (15) in rotary connection is installed between the two positioning blocks (16), and the limiting block (15) abuts against the annular rack plate (13).
7. The slotted friction type one-way T-shaped high-strength bolt according to claim 6, wherein a shaft rod (17) is rotatably connected between the two positioning blocks (16), the limiting block (15) is installed on the shaft rod (17), and a torsion spring (14) is installed between the limiting block (15) and the positioning blocks (16).
8. A use method of a long round hole type friction type one-way T-shaped high-strength bolt is characterized by comprising the following steps:
s1, extending the T-shaped bolt cap (1) into the closed connecting plate through the long round hole (8);
s2, rotating the bolt rod (2), and determining that the T-shaped bolt cap (1) is perpendicular to the long round hole (8) through the bolt cap orientation mark (5);
and S3, clamping the fixed end (4) of the hexagon bolt by using a spanner, and fastening the hexagon nut (3) by using another spanner to ensure that the applied pretension force reaches the pulling force required by the connection design, thereby completing the installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210354603.6A CN114658739A (en) | 2022-04-06 | 2022-04-06 | Long-circular-hole friction type one-way T-shaped high-strength bolt and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210354603.6A CN114658739A (en) | 2022-04-06 | 2022-04-06 | Long-circular-hole friction type one-way T-shaped high-strength bolt and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114658739A true CN114658739A (en) | 2022-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210354603.6A Pending CN114658739A (en) | 2022-04-06 | 2022-04-06 | Long-circular-hole friction type one-way T-shaped high-strength bolt and using method thereof |
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|---|---|
| CN (1) | CN114658739A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009062775A (en) * | 2007-09-07 | 2009-03-26 | Akihiro Yamamoto | Method of connecting and fixing wooden building members to each other |
| CN201779119U (en) * | 2010-05-31 | 2011-03-30 | 陈献友 | Anti-loosening bolt assembly |
| CN106836483A (en) * | 2017-01-06 | 2017-06-13 | 长安大学 | The unilateral bolt connection node of inner sleeve cartridge type of steel pipe column and H profile steel beam |
| CN208057650U (en) * | 2018-03-31 | 2018-11-06 | 杨润平 | Anti-loosening bolt |
| CN208089738U (en) * | 2017-12-20 | 2018-11-13 | 中民筑友房屋科技有限公司 | A kind of bolt pair |
| CN110735841A (en) * | 2019-11-20 | 2020-01-31 | 青岛城建集团有限公司 | T-shaped unilateral bolt fastener and using method thereof |
| CN111059125A (en) * | 2019-11-27 | 2020-04-24 | 同济大学 | T-shaped unilateral bolt fastener |
| CN214998780U (en) * | 2021-06-11 | 2021-12-03 | 李建明 | Bolt and nut anti-loosening structure |
-
2022
- 2022-04-06 CN CN202210354603.6A patent/CN114658739A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009062775A (en) * | 2007-09-07 | 2009-03-26 | Akihiro Yamamoto | Method of connecting and fixing wooden building members to each other |
| CN201779119U (en) * | 2010-05-31 | 2011-03-30 | 陈献友 | Anti-loosening bolt assembly |
| CN106836483A (en) * | 2017-01-06 | 2017-06-13 | 长安大学 | The unilateral bolt connection node of inner sleeve cartridge type of steel pipe column and H profile steel beam |
| CN208089738U (en) * | 2017-12-20 | 2018-11-13 | 中民筑友房屋科技有限公司 | A kind of bolt pair |
| CN208057650U (en) * | 2018-03-31 | 2018-11-06 | 杨润平 | Anti-loosening bolt |
| CN110735841A (en) * | 2019-11-20 | 2020-01-31 | 青岛城建集团有限公司 | T-shaped unilateral bolt fastener and using method thereof |
| CN111059125A (en) * | 2019-11-27 | 2020-04-24 | 同济大学 | T-shaped unilateral bolt fastener |
| CN214998780U (en) * | 2021-06-11 | 2021-12-03 | 李建明 | Bolt and nut anti-loosening structure |
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