CN113847324A - Anti-loosening bolt for bridge - Google Patents
Anti-loosening bolt for bridge Download PDFInfo
- Publication number
- CN113847324A CN113847324A CN202111104714.3A CN202111104714A CN113847324A CN 113847324 A CN113847324 A CN 113847324A CN 202111104714 A CN202111104714 A CN 202111104714A CN 113847324 A CN113847324 A CN 113847324A
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- Prior art keywords
- arc
- rod
- pipe
- blind hole
- external thread
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- 230000004323 axial length Effects 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 9
- 230000003044 adaptive effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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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
- 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
- F16B39/04—Locking of screws, bolts or nuts in which the locking takes place after screwing down with a member penetrating the screw-threaded surface of at least one part, e.g. a pin, a wedge, cotter-pin, screw
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention discloses a looseness-preventing bolt for a bridge, which comprises a bolt main body, a limiting pipe, ejector rods and a positioning rod, wherein the bolt main body consists of a nut, an internal thread blind hole, a round blind hole, a first external thread rod, grooves and through holes, the lower end face of the nut is provided with the coaxial first external thread rod, the upper end face of the nut is provided with the coaxial internal thread blind hole, the coaxial round blind hole is arranged at the inner bottom of the internal thread blind hole and extends into the first external thread rod, the inner wall of the round blind hole is provided with a plurality of grooves, the grooves are distributed in a circumferential manner by taking the axis of the first external thread rod as the circle center, the bottoms of the grooves are provided with the through holes arranged in the radial direction, a through hole is clamped between every two adjacent grooves, and one adaptive ejector rod is inserted into each through hole. According to the bolt, after the bolt main body is installed, the ejector rod extends out of the outer surface of the first external thread rod to abut against the inner wall of the installation hole, so that the first external thread rod is not easy to move in the installation hole in the axial direction and the radial direction.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of fasteners, in particular to the technical field of anti-loosening bolts for bridges.
[ background of the invention ]
The bolt is a mechanical part and is a cylindrical threaded fastener matched with a nut. A fastener consisting of a head part and a screw (a cylinder with external threads) is matched with a nut and used for fastening and connecting two parts with through holes, and the connection form is called bolt connection. The bolt is widely used, one of main fasteners of the bridge when the bolt is used, the bridge is influenced by wind power, vehicles and other factors in the working process to generate vibration, and therefore the bolt is easy to loosen.
[ summary of the invention ]
The invention aims to solve the problems in the prior art and provides a locking bolt for a bridge, which can be firmly installed and is not easy to loosen.
In order to achieve the purpose, the invention provides a looseness-preventing bolt for a bridge, which comprises a bolt body, a limiting pipe, an ejector rod and a positioning rod, wherein the bolt body is composed of a nut, an internal thread blind hole, a round blind hole, a first external thread rod, grooves and through holes, the first external thread rod is coaxial with the nut, the first external thread rod is arranged on the lower end face of the nut, the internal thread blind hole is coaxial with the nut, the round blind hole extends into the first external thread rod, a plurality of grooves are arranged on the inner wall of the round blind hole, the grooves are circumferentially distributed by taking the axis of the first external thread rod as the center of a circle, the bottoms of the grooves are provided with through holes which are radially arranged, a through hole is clamped between every two adjacent grooves, a corresponding ejector rod is inserted into each through hole, the limiting pipe is composed of an internal prismatic pipe, a round pipe, an arc-shaped plate, a semicircular spherical magnet and an arc-shaped plate-shaped magnet, the internal prismatic pipe is arranged in the round blind hole, and the internal pipe, The round blind hole is coaxial, the terminal surface is equipped with coaxial pipe under the interior arris pipe, the pipe suits with the round blind hole, the lower terminal surface of pipe is equipped with a plurality of arc, the horizontal cross-section of arc is the axis of arc and arc coaxial with the axis of first external screw thread pole, a plurality of arc uses first external screw thread pole axle center to be the circumference and distributes as the centre of a circle, a plurality of arc and a plurality of recess one-to-one, semicircle spherical magnet, arc plate magnet all establishes on the outer wall of arc, accompany an arc plate magnet between per two adjacent semicircle spherical magnet, arc plate magnet all suits with the through-hole, the locating lever is by the outer threaded rod of second, the round bar is constituteed, the terminal surface is equipped with coaxial round bar under the outer threaded rod of second, the outer threaded rod of second twists in the blind hole, the round bar inserts in the spacing intraductal.
Preferably, the through hole is formed between the bottom of the round blind hole and the lower end face of the nut.
Preferably, the axial length of the limiting pipe is equal to that of the round blind hole, and the arc-shaped plates are arranged below the screw cap.
Preferably, only one hemispheric magnet or one arc-shaped plate magnet is mounted on one arc-shaped plate, the number of the through holes, the number of the hemispheric magnets and the number of the arc-shaped plate magnets are the same, the hemispheric magnets correspond to the through holes one by one, and the arc-shaped plate magnets correspond to the through holes one by one.
Preferably, the arc-shaped plate-shaped magnet is embedded into the arc-shaped plate, and the outer wall of the arc-shaped plate-shaped magnet is coplanar with the outer wall of the arc-shaped plate.
Preferably, the ejector rod is an iron rod, when the ejector rod is matched with the semi-spherical magnet, the semi-spherical magnet abuts against the ejector rod, the ejector rod extends out of the outer surface of the first external thread rod, and the maximum radial length between the rod body of the ejector rod and the axis of the first external thread rod is larger than the radial length of the thread bottom of the external thread of the first external thread rod and smaller than the radial length of the thread top of the external thread of the first external thread rod; when the ejector rod is matched with the arc-shaped plate magnet, the arc-shaped plate magnet attracts the ejector rod, and the maximum radial length between the rod body of the ejector rod and the axis of the first external thread rod is smaller than the radial length of the external thread tooth bottom of the first external thread rod.
Preferably, the groove is a semispherical groove arranged in the radial direction, and the semispherical groove is matched with the semispherical magnet.
Preferably, the axial lengths of the round rod and the round blind hole are equal, the axial lengths of the second external threaded rod and the second internal threaded blind hole are equal, the upper end face of the second external threaded rod is provided with a mounting hole, and the horizontal section of the mounting hole is parallel and symmetrical to the section of the inner pipe of the inner prismatic pipe.
Preferably, the inner pipe of the inner prismatic pipe is a polygonal pipe, the inner pipe of the circular pipe is an inscribed circle of the polygonal pipe, the outer pipe of the inner prismatic pipe is a first circular pipe, the outer diameter of the first circular pipe is the same as that of the circular pipe, the arc-shaped plate is a part of the second circular pipe, and the inner diameter and the outer diameter of the second circular pipe are the same as those of the circular pipe.
The invention has the beneficial effects that: according to the bolt, after the bolt main body is installed, the ejector rod extends out of the outer surface of the first external thread rod to abut against the inner wall of the installation hole, so that the first external thread rod is not easy to move in the installation hole in the axial direction and the radial direction, and the first external thread rod can be tightly and firmly fixed in the installation hole; an arc-shaped plate-shaped magnet is clamped between every two adjacent semi-spherical magnets, so that after the limiting pipe rotates, the semi-spherical magnets and the arc-shaped plate-shaped magnets can adapt to the through holes in turn, and the ejector rod can be conveniently adjusted to extend out of and retract into the outer surface of the first external threaded rod; the horizontal section of the mounting hole is parallel and symmetrical to the section of the inner pipe of the inner edge pipe, and the second outer threaded rod and the inner edge pipe are screwed through the same prism, so that the mounting is convenient; the axial length of spacing pipe, circle blind hole, round bar equals, and the axial length of second outer threaded rod, internal thread blind hole equals, and after the bolt installation was accomplished, spacing pipe can not axial displacement, ensures that the hemisphere form magnet can effectively withstand the ejector pin.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
[ description of the drawings ]
Fig. 1 is a front view of a locking bolt for a bridge according to the present invention.
In the figure: the bolt comprises a bolt body 1, a nut 11, an internal thread blind hole 111, a round blind hole 112, a first external thread rod 12, a groove 121, a through hole 122, a limiting pipe 2, an internal prism pipe 21, a round pipe 22, an arc-shaped plate 23, a semi-spherical magnet 241, an arc-shaped plate-shaped magnet 242, a push rod 3, a positioning rod 4, a second external thread rod 41 and a round rod 42.
[ detailed description ] embodiments
Referring to fig. 1, the anti-loosening bolt for a bridge of the present invention comprises a bolt body 1, a limiting tube 2, an ejector rod 3 and a positioning rod 4, wherein the bolt body 1 comprises a nut 11, an internal threaded blind hole 111, a circular blind hole 112, a first external threaded rod 12, a groove 121 and a through hole 122, the lower end surface of the nut 11 is provided with the coaxial first external threaded rod 12, the upper end surface of the nut 11 is provided with the coaxial internal threaded blind hole 111, the internal bottom of the internal threaded blind hole 111 is provided with the coaxial circular blind hole 112, the circular blind hole 112 extends to the inside of the first external threaded rod 12, the inner wall of the circular blind hole 112 is provided with a plurality of grooves 121, the plurality of grooves 121 are circumferentially distributed with the axis of the first external threaded rod 12 as the center, the groove 121 is provided with a through hole 122 arranged in the radial direction, a through hole 122 is clamped between two adjacent grooves 121, a corresponding ejector rod 3 is inserted into each through hole 122, and the limiting tube 2 comprises an inner tube 21, an inner tube, a plurality of inner tube, a plurality of inner tube, a plurality of inner tube, a plurality of inner tube, a plurality of a plurality, The circular tube 22, the arc-shaped plates 23, the semi-spherical magnets 241 and the arc-shaped plate-shaped magnets 242 are arranged, the inner edge tube 21 is arranged in the circular blind hole 112, the inner edge tube 21 and the circular blind hole 112 are coaxial, the coaxial circular tube 22 is arranged on the lower end face of the inner edge tube 21, the circular tube 22 is matched with the circular blind hole 112, the plurality of arc-shaped plates 23 are arranged on the lower end face of the circular tube 22, the horizontal section of each arc-shaped plate 23 is arc-shaped, the axis of each arc-shaped plate 23 is coaxial with the axis of the first outer threaded rod 12, the plurality of arc-shaped plates 23 are circumferentially distributed by taking the axis of the first outer threaded rod 12 as the center, the plurality of arc-shaped plates 23 are in one-to-one correspondence with the plurality of grooves 121, the semi-spherical magnets 241 and the arc-shaped plate-shaped magnets 242 are arranged on the outer wall of the arc-shaped plates 23, one arc-shaped plate-shaped magnet 242 is clamped between every two adjacent semi-spherical magnets 241, the semi-spherical magnets 241 and the arc-shaped magnets 242 are matched with the through holes 122, and the positioning rod 4 is composed of the second outer threaded rods 41, the arc-shaped magnets 41 and the arc-shaped plates 242, The round rod 42 is arranged, the lower end face of the second external threaded rod 41 is provided with the coaxial round rod 42, the second external threaded rod 41 is screwed into the internal threaded blind hole 111, the round rod 42 is inserted into the limiting tube 2, the through hole 122 is arranged between the inner hole bottom of the round blind hole 112 and the lower end face of the screw cap 11, the axial lengths of the limiting tube 2 and the round blind hole 112 are equal, a plurality of arc-shaped plates 23 are all arranged below the screw cap 11, only one semi-spherical magnet 241 or one arc-shaped plate magnet 242 is arranged on one arc-shaped plate 23, the number of the through holes 122, the number of the semi-spherical magnets 241 and the number of the arc-shaped plate magnets 242 are the same, the semi-spherical magnets 241 are in one-to-one correspondence with the through holes 122, the arc-shaped plate magnets 242 are embedded into the arc-shaped plates 23, the outer walls of the arc-shaped plate magnets 242 are coplanar with the outer walls of the arc-shaped plates 23, the ejector rod 3 is an iron rod, and when the ejector rod 3 is matched with the semi-spherical magnet 241, the semispherical magnet 241 props against the ejector rod 3, the ejector rod 3 extends out of the outer surface of the first external thread rod 12, and the maximum radial length between the rod body of the ejector rod 3 and the axis of the first external thread rod 12 is larger than the radial length of the external thread root of the first external thread rod 12 and smaller than the radial length of the external thread crest of the first external thread rod 12; when the top rod 3 is matched with the arc-shaped plate-shaped magnet 242, the arc-shaped plate-shaped magnet 242 attracts the top rod 3, the maximum radial length between the rod body of the top rod 3 and the axis of the first external threaded rod 12 is smaller than the radial length of the external thread root of the first external threaded rod 12, the groove 121 is a semispherical groove which is radially arranged, the semispherical groove is matched with the semispherical magnet 241, the axial lengths of the round rod 42 and the round blind hole 112 are equal, the axial lengths of the second external threaded rod 41 and the internal threaded blind hole 111 are equal, the upper end surface of the second external threaded rod 41 is provided with a mounting hole 411, the horizontal section of the mounting hole 411 is parallel and symmetrical to the section of the inner tube of the inner prismatic tube 21, the inner tube of the inner prismatic tube 21 is a polygonal tube, the inner tube of the round tube 22 is an inscribed circle of the polygonal tube, the outer tube of the inner prismatic tube 21 is a first round tube, the outer diameter of the first round tube is the same as the outer diameter of the round tube 22, the arc-shaped plate 23 is a part of the second round tube, and the inner diameter of the second round tube 22, The outer diameters are all the same.
The working process of the invention is as follows:
the invention relates to a locking bolt for a bridge, which comprises a first step; taking out the positioning rod 4, and performing a second step; inserting a prism into the inner prism tube 21, rotating the prism to rotate the limiting tube 2, enabling the ejector rod 3 to be matched with the arc-shaped plate-shaped magnet 242, enabling the arc-shaped plate-shaped magnet 242 of the ejector rod 3 to attract the ejector rod 3, and enabling the ejector rod 3 not to extend out of the outer surface of the first outer threaded rod 12; mounting the bolt main body 1, and fourthly; rotating the limiting pipe 2, wherein the ejector rod 3 is matched with the semi-spherical magnet 241, the semi-spherical magnet 241 abuts against the ejector rod 3, and the ejector rod 3 extends out of the outer surface of the first external thread rod 12; the positioning rod 4 is installed.
According to the invention, after the bolt body 1 is installed, the ejector rod 3 extends out of the outer surface of the first external thread rod 12 to abut against the inner wall of the installation hole, so that the first external thread rod 12 is not easy to move in the installation hole in the axial direction and the radial direction, and the first external thread rod 12 can be tightly and firmly fixed in the installation hole; an arc-shaped plate-shaped magnet 242 is clamped between every two adjacent semi-spherical magnets 241, so that after the limiting pipe 2 rotates, the semi-spherical magnets 241 and the arc-shaped plate-shaped magnets 242 can be adapted to the through holes 122 in turn, and the ejector rod 3 can be conveniently adjusted to extend out of and retract into the outer surface of the first external threaded rod 12; the horizontal section of the mounting hole 411 is parallel and symmetrical to the section of the inner tube of the inner edge tube 21, and the second outer threaded rod 41 and the inner edge tube 21 are screwed through the same prism, so that the mounting is convenient; the axial length of the limiting pipe 2, the axial length of the round blind hole 112 and the axial length of the round rod 42 are equal, the axial length of the second external threaded rod 41 and the axial length of the internal threaded blind hole 111 are equal, and after the bolt is installed, the limiting pipe 2 cannot move axially, so that the semi-spherical magnet 241 can be guaranteed to effectively support the ejector rod 3.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (9)
1. The utility model provides a locking bolt that moves for bridge which characterized in that: comprises a bolt main body (1), a limiting pipe (2), a top rod (3) and a positioning rod (4), wherein the bolt main body (1) consists of a nut (11), an internal thread blind hole (111), a round blind hole (112), a first external thread rod (12), a groove (121) and a through hole (122), the lower end surface of the nut (11) is provided with the coaxial first external thread rod (12), the upper end surface of the nut (11) is provided with the coaxial internal thread blind hole (111), the inner bottom of the internal thread blind hole (111) is provided with the coaxial round blind hole (112), the round blind hole (112) extends to the inside of the first external thread rod (12), the inner wall of the round blind hole (112) is provided with a plurality of grooves (121), the plurality of grooves (121) are circumferentially distributed by taking the axle center of the first external thread rod (12), the bottoms of the grooves (121) are provided with radially arranged through holes (122), and one through hole (122) is clamped between two adjacent grooves (121), a mandril (3) which is suitable for each through hole (122) is inserted into each through hole (122), each limiting pipe (2) is composed of an inner prismatic pipe (21), a round pipe (22), an arc-shaped plate (23), a semi-spherical magnet (241) and an arc-shaped plate-shaped magnet (242), the inner prismatic pipe (21) is arranged in the round blind hole (112), the inner prismatic pipe (21) and the round blind hole (112) are coaxial, the lower end face of the inner prismatic pipe (21) is provided with the coaxial round pipe (22), the round pipe (22) is suitable for the round blind hole (112), the lower end face of the round pipe (22) is provided with a plurality of arc-shaped plates (23), the horizontal cross section of each arc-shaped plate (23) is arc-shaped, the axis of each arc-shaped plate (23) is coaxial with the axis of a first outer threaded rod (12), the plurality of arc-shaped plates (23) are circumferentially distributed by taking the axis of the first outer threaded rod (12) as the center of the circle, the plurality of each arc-shaped plate (23) is in one-to-one correspondence with the plurality of grooves (121), the semi-spherical magnet (241), Arc plate magnet (242) all are established on the outer wall of arc (23), accompany an arc plate magnet (242) between per two adjacent hemisphere magnets (241), hemisphere magnet (241), arc plate magnet (242) all suit with through-hole (122), locating lever (4) are by second outer threaded rod (41), round bar (42) are constituteed, terminal surface is equipped with coaxial round bar (42) under second outer threaded rod (41), second outer threaded rod (41) are twisted in internal thread blind hole (111), round bar (42) insert in spacing pipe (2).
2. The anti-loosening bolt for the bridge as claimed in claim 1, wherein: the through hole (122) is arranged between the inner hole bottom of the round blind hole (112) and the lower end face of the screw cap (11).
3. The anti-loosening bolt for the bridge as claimed in claim 1, wherein: the axial length of the limiting pipe (2) and the axial length of the round blind hole (112) are equal, and the arc-shaped plates (23) are arranged below the screw cap (11).
4. The anti-loosening bolt for the bridge as claimed in claim 1, wherein: only one semi-spherical magnet (241) or one arc-shaped plate magnet (242) is arranged on one arc-shaped plate (23), the number of the through holes (122), the number of the semi-spherical magnets (241) and the number of the arc-shaped plate magnets (242) are the same, the semi-spherical magnets (241) correspond to the through holes (122) one by one, and the arc-shaped plate magnets (242) correspond to the through holes (122) one by one.
5. The anti-loosening bolt for the bridge as claimed in claim 1, wherein: the arc-shaped plate-shaped magnet (242) is embedded into the arc-shaped plate (23), and the outer wall of the arc-shaped plate-shaped magnet (242) is coplanar with the outer wall of the arc-shaped plate (23).
6. The anti-loosening bolt for the bridge as claimed in claim 1, wherein: the ejector rod (3) is an iron rod, when the ejector rod (3) is matched with the semi-spherical magnet (241), the semi-spherical magnet (241) abuts against the ejector rod (3), the ejector rod (3) extends out of the outer surface of the first external thread rod (12), and the maximum radial length between the rod body of the ejector rod (3) and the axis of the first external thread rod (12) is larger than the radial length of the external thread bottom of the first external thread rod (12) and smaller than the radial length of the external thread top of the first external thread rod (12); when the ejector rod (3) is matched with the arc-shaped plate-shaped magnet (242), the arc-shaped plate-shaped magnet (242) attracts the ejector rod (3), and the maximum radial length between the rod body of the ejector rod (3) and the axis of the first external thread rod (12) is smaller than the radial length of the external thread tooth bottom of the first external thread rod (12).
7. The anti-loosening bolt for the bridge as claimed in claim 1, wherein: the groove (121) is a semispherical groove which is radially arranged and is matched with the semispherical magnet (241).
8. The anti-loosening bolt for the bridge as claimed in claim 1, wherein: the axial length of round rod (42), round blind hole (112) equals, and the axial length of second outer threaded rod (41), internal thread blind hole (111) equals, and second outer threaded rod (41) up end is equipped with mounting hole (411), and the horizontal cross-section of mounting hole (411) is parallel symmetry with the inner tube cross-section of interior arris pipe (21).
9. The anti-loosening bolt for the bridge as claimed in claim 1, wherein: the inner pipe of the inner prismatic pipe (21) is a polygonal pipe, the inner pipe of the circular pipe (22) is an inscribed circle of the polygonal pipe, the outer pipe of the inner prismatic pipe (21) is a first circular pipe, the outer diameter of the first circular pipe is the same as that of the circular pipe (22), the arc-shaped plate (23) is a part of a second circular pipe, and the inner diameter and the outer diameter of the second circular pipe are the same as those of the circular pipe (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111104714.3A CN113847324A (en) | 2021-09-22 | 2021-09-22 | Anti-loosening bolt for bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111104714.3A CN113847324A (en) | 2021-09-22 | 2021-09-22 | Anti-loosening bolt for bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113847324A true CN113847324A (en) | 2021-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111104714.3A Pending CN113847324A (en) | 2021-09-22 | 2021-09-22 | Anti-loosening bolt for bridge |
Country Status (1)
| Country | Link |
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| CN (1) | CN113847324A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115325012A (en) * | 2022-08-12 | 2022-11-11 | 嘉兴圣龙五金科技股份有限公司 | Anti-disassembly bolt |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115325012A (en) * | 2022-08-12 | 2022-11-11 | 嘉兴圣龙五金科技股份有限公司 | Anti-disassembly bolt |
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Application publication date: 20211228 |