CN113175471A - U-shaped bolt assembly with strong stability for mechanical configuration - Google Patents
U-shaped bolt assembly with strong stability for mechanical configuration Download PDFInfo
- Publication number
- CN113175471A CN113175471A CN202110528462.0A CN202110528462A CN113175471A CN 113175471 A CN113175471 A CN 113175471A CN 202110528462 A CN202110528462 A CN 202110528462A CN 113175471 A CN113175471 A CN 113175471A
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- Prior art keywords
- cavity
- gear
- groove
- rod
- sliding
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- 230000006835 compression Effects 0.000 claims abstract description 7
- 238000007906 compression Methods 0.000 claims abstract description 7
- 238000003466 welding Methods 0.000 claims abstract description 5
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 4
- 238000010030 laminating Methods 0.000 claims 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/282—Locking by means of special shape of work-engaging surfaces, e.g. notched or toothed nuts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/284—Locking by means of elastic deformation
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
Abstract
The invention discloses a U-shaped bolt component with strong stability for mechanical configuration, which comprises a cavity, wherein the bottom surface of a dovetail block is fixedly connected with the top surface of a gear, the gear is arranged between two toothed rings and is meshed with the toothed rings, the bottom surface of the gear is provided with a groove, one end of the gear is jointed and arranged in a second chute, the section of the gear is in a right triangle shape, the other end of the gear penetrates out of the second chute and penetrates into the groove, a multi-section telescopic rod is sleeved with a second spring which is a compression spring, a polygonal block is fixedly sleeved with a second limiting ring, the bottom surface of the second limiting ring is jointed with the bottom surface in the cavity, the second limiting ring is arranged in the groove, the gear is made of alloy steel material, the polygonal block is connected with a transverse plate in a welding manner, the temporary fixation between the toothed ring and the gear can be realized, so that the stability between a nut and a U-shaped screw rod is improved, the falling phenomenon is effectively prevented, and the safety coefficient of equipment is improved, the use requirement is met.
Description
Technical Field
The invention belongs to the technical field of fasteners, and particularly relates to a U-shaped bolt assembly with high stability for mechanical configuration.
Background
A bolt is a mechanical part, a cylindrical threaded fastener matched with a nut, a fastener composed of a head part and a screw (a cylinder with an external thread) needs to be matched with the nut and is used for fastening and connecting two parts with through holes, the connection form is called bolt connection, if the nut is screwed off from the bolt, the two parts can be separated, so the bolt connection belongs to detachable connection, the bolt is widely applied in the mechanical configuration industry, the bolt needs to be matched with the nut for use under most conditions, and the nut is easy to fall off due to various reasons when the U-shaped bolt is used for a long time, so that the bolt connection fails, potential safety hazards exist, and the use requirements cannot be met.
Disclosure of Invention
In order to solve the above-mentioned problems, the present invention provides a U-bolt assembly with high mechanical stability.
The invention aims to accomplish the task, and provides a U-shaped bolt assembly with strong stability for mechanical configuration, which comprises a cavity, wherein the cavity is formed by fixedly connecting two half barrels, two nuts are symmetrically and rotatably embedded in the cavity, two first limiting rings are fixedly sleeved on the nuts, the two first limiting rings are positioned in the cavity and are attached to the inner surface of the cavity, a toothed ring is fixedly sleeved on the nuts, a U-shaped screw is arranged right below the cavity, a vertical rod of the U-shaped screw penetrates through the nuts, a gear is rotatably attached to the top surface in the cavity, a dovetail groove is annularly formed in the top surface in the cavity, a dovetail block is slidably attached to the inside of the dovetail groove, the bottom surface of the dovetail block is fixedly connected with the top surface of the gear, the gear is arranged between the two toothed rings, the gear is meshed with the toothed rings, a groove is formed in the bottom surface of the gear, and an inner toothed ring is attached to the inside of the groove, the inner gear ring is fixedly connected with the inner wall of the gear, the cavity is provided with a through hole, a rotating block is rotatably arranged in the through hole in a fitting manner, the top surface of the rotating block is provided with a straight groove, the bottom surface of the rotating block is fixedly connected with a vertical rod, the cross section of the vertical rod is square, the bottom end of the vertical rod penetrates through the through hole and penetrates through the gear and into the groove, the vertical rod is slidably connected with the gear, a barrel body is fixedly sleeved on the vertical rod and is arranged in the inner gear ring, the top surface of the barrel body is fitted with the inner top surface of the gear, a polygonal block is arranged under the cavity, the top surface of the polygonal block is provided with a first sliding groove, a T-shaped sliding rod is slidably arranged in the first sliding groove in a fitting manner, the outer cross section of the polygonal block is a regular polygon, the top end of the polygonal block penetrates into the cavity and is fixedly connected with a transverse plate in the groove, the top end of the T-shaped sliding rod penetrates through the transverse plate and is fixedly connected with the bottom surface of the vertical rod, the cross section of the T-shaped sliding rod is circular, the top surface of the cross rod of the T-shaped sliding rod is attached to the bottom surface of the transverse plate, the T-shaped sliding rod is rotationally connected with the transverse plate, a first spring is arranged in the first sliding groove, the first spring is a compression spring, a plurality of second sliding grooves are annularly formed on the top surface of the polygonal block, a plurality of sections of telescopic rods are arranged in the second sliding groove, one end of each section of telescopic rod is fixedly connected with the side wall of the polygonal block, the other end of the multi-section telescopic rod is fixedly connected with a tooth, one end of the tooth is arranged in the second chute in an attaching way, the section of the tooth is right triangle, the other end of the tooth penetrates out of the second chute and penetrates into the groove, the multi-section telescopic rod is sleeved with a second spring, the second spring is a compression spring, a second limiting ring is fixedly sleeved on the polygonal block, the bottom surface of the second limiting ring is attached to the inner bottom surface of the cavity, and the second limiting ring is arranged in the groove.
Preferably, the gear is made of alloy steel materials.
Preferably, the polygonal block and the transverse plate are connected by welding.
Compared with the prior art, the invention has the beneficial effects that: this device simple structure, the function is various, and the practicality is strong, can realize the temporary fixation between ring gear and the gear through setting up first spacing ring, dovetail piece, interior ring gear, rotatory piece, montant, staving, polygonal piece, T shape slide bar, diaphragm, first spring, multisection telescopic link, tooth, second spring and second spacing ring to improve the stability between nut and the U-shaped screw rod, the effectual emergence that prevents the phenomenon of droing, improve equipment's factor of safety, satisfy the user demand.
Drawings
FIG. 1 is a block diagram of an embodiment of the present invention.
Fig. 2 is a sectional view a-a of fig. 1.
Fig. 3 is an enlarged view of a portion a of fig. 1.
FIG. 4 is a schematic view of the present invention.
In the figure: the device comprises a cavity 1, a nut 2, a first limiting ring 3, a toothed ring 4, a U-shaped screw 5, a gear 6, a dovetail block 7, an inner toothed ring 8, a rotating block 9, a vertical rod 10, a barrel body 11, a polygonal block 12, a T-shaped sliding rod 13, a transverse plate 14, a first spring 15, a multi-section telescopic rod 16, a tooth 17, a second spring 18, a second limiting ring 19, a dovetail groove 1-1, a through hole 1-2, a groove 6-1, a straight groove 9-1, a first sliding groove 12-1 and a second sliding groove 12-2.
Detailed Description
The invention is described in further detail below with reference to the following detailed description and accompanying drawings:
referring to fig. 1 to 4, a U-shaped bolt assembly with strong stability for mechanical configuration comprises a cavity 1, the cavity 1 is formed by fixedly connecting two half barrels, two nuts 2 are symmetrically and rotatably embedded in the cavity 1, two first limiting rings 3 are fixedly sleeved on the nuts 2, the two first limiting rings 3 are positioned in the cavity 1 and are attached to the inner surface of the cavity 1, toothed rings 4 are fixedly sleeved on the nuts 2, a U-shaped screw 5 is arranged under the cavity 1, a vertical rod of the U-shaped screw 5 penetrates through the nuts 2, a gear 6 is rotatably attached to the inner top surface of the cavity 1, a dovetail groove 1-1 is annularly formed on the inner top surface of the cavity 1, a dovetail block 7 is slidably attached to the inner portion of the dovetail groove 1-1, the bottom surface of the dovetail block 7 is fixedly connected with the top surface of the gear 6, the gear 6 is arranged between the two toothed rings 4, and the gear 6 is engaged with the toothed rings 4, the bottom surface of the gear 6 is provided with a groove 6-1, an inner gear ring 8 is fitted in the groove 6-1, the inner gear ring 8 is fixedly connected with the inner wall of the gear 6, the cavity 1 is provided with a through hole 1-2, a rotating block 9 is rotatably fitted in the through hole 1-2, the top surface of the rotating block 9 is provided with a straight groove 9-1, the bottom surface of the rotating block 9 is fixedly connected with a vertical rod 10, the cross section of the vertical rod 10 is square, the bottom end of the vertical rod 10 penetrates through the through hole 1-2 and penetrates through the gear 6 and the groove 6-1, the vertical rod 10 is slidably connected with the gear 6, the vertical rod 10 is fixedly sleeved with a barrel body 11, the barrel body 11 is arranged in the inner gear ring 8, the top surface of the barrel body 11 is fitted with the inner top surface of the gear 6, a polygonal block 12 is arranged under the cavity 1, the top surface of the polygonal block 12 is provided with a first sliding groove 12-1, a T-shaped sliding rod 13 is arranged in the first sliding groove 12-1 in a fit and sliding manner, the outer cross section of the polygonal block 12 is a regular polygon, the top end of the polygonal block 12 penetrates into the cavity 1 and penetrates into the groove 6-1 to be fixedly connected with a transverse plate 14, the polygonal block 12 is connected with the cavity 1 in a sliding manner, the top end of the T-shaped sliding rod 13 penetrates through the transverse plate 14 to be fixedly connected with the bottom surface of a vertical rod 10, the cross section of the T-shaped sliding rod 13 is circular, the top surface of the cross rod of the T-shaped sliding rod 13 is fit with the bottom surface of the transverse plate 14, the T-shaped sliding rod 13 is rotationally connected with the transverse plate 14, a first spring 15 is arranged in the first sliding groove 12-1, the first spring 15 is a compression spring, a plurality of second sliding grooves 12-2 are annularly formed in the top surface of the polygonal block 12, a plurality of telescopic rods 16 are arranged in the second sliding grooves 12-2, one end of each telescopic rod 16 is fixedly connected with the side wall of the polygonal block 12, the other end of the multi-section telescopic rod 16 is fixedly connected with a tooth 17, one end of the tooth 17 is attached to and arranged in the second sliding groove 12-2, the section of the tooth 17 is a right triangle, the other end of the tooth 17 penetrates out of the second sliding groove 12-2 and penetrates into the groove 6-1, a second spring 18 is sleeved on the multi-section telescopic rod 16, the second spring 18 is a compression spring, a second limiting ring 19 is fixedly sleeved on the polygonal block 12, the bottom surface of the second limiting ring 19 is attached to the inner bottom surface of the cavity 1, and the second limiting ring 19 is arranged in the groove 6-1.
The gear 6 is made of alloy steel materials.
The polygonal block 12 and the transverse plate 14 are connected by welding (i.e. adopting welding connection).
The working principle is as follows: when mechanical equipment needs to be fixed through a U-shaped screw, the device is used for replacing a traditional U-shaped screw for fixing, firstly, two vertical rods of the U-shaped screw 5 penetrate through corresponding connecting holes, then the cavity 1 is moved, the cavity 1 drives the nut 2 to move through the first limiting ring 3, so that the nut 2 is positioned right above the vertical rods of the U-shaped screw 5, then the cavity 1 is moved downwards, the cavity 1 indirectly drives the nut 2 to be sleeved on the vertical rods of the U-shaped screw 5, then a screwdriver is inserted into the linear groove 9-1 to start rotating the rotating block 9, the rotating block 9 is not required to be pressed downwards, the rotating block 9 drives the vertical rods 10 to rotate, the vertical rods 10 drive the gear 6 to rotate, the gear 6 drives the toothed ring 4 to rotate, the toothed ring 4 drives the nut 2 to rotate on the vertical rods of the U-shaped screw 5, the nut 2 drives the first limiting ring 3 to move, the first limiting ring 3 drives the cavity 1 to move, the cavity 1 drives the gear 6, the gear 6 drives the barrel body 11 to move, the barrel body 11 drives the T-shaped sliding rod 13 to move downwards, the T-shaped sliding rod 13 drives the first spring 15 to move downwards, the first spring 15 drives the polygonal block 12 to move downwards to gradually fit with the surface of equipment, the rotating block 9 is continuously screwed after the bottom surface of the polygonal block 12 is fit with the surface of the equipment, the rotating block 9 indirectly drives the gear 6 to move downwards, the gear 6 drives the inner toothed ring 8 to move downwards to gradually engage with the plurality of teeth 17, after the inner toothed ring 8 moves downwards to gradually engage with the plurality of teeth 17, the inner toothed ring 8 rotates to push the teeth 17 to move to extrude the second spring 18, the teeth 17 gradually shrink back into the second sliding chute 12-2, when the bottom surface of the cavity 1 is fit with the surface of the equipment, the bottom surface of the cavity 1 and the bottom surface of the polygonal block 12 are in the same plane, as shown in figure 4, the fixation between the equipment is realized, as the main view and the top view of the teeth 17 are right-angled triangles, therefore, the limit of the inner gear ring 8 is realized, the inner gear ring 8 can only rotate in one direction, when the nut 2 is separated from the U-shaped screw 5 due to external factors, the nut 2 and the U-shaped screw 5 rotate relatively, the nut 2 drives the gear 6 to rotate, the gear 6 drives the gear ring 8 to rotate, the inner gear ring 8 drives the teeth 17 to rotate, the teeth 17 drive the multi-section telescopic rod 16 to rotate, the multi-section telescopic rod 16 drives the polygonal block 12 to rotate, the polygonal block 12 drives the cavity 1 to rotate, the cross section of the polygonal block 12 is a regular polygon and is in sliding connection with the cavity 1, the cavity 1 cannot rotate due to the limit of the vertical rod of the U-shaped screw 5, so that the temporary fixation between the nut 2 and the U-shaped screw 5 is realized, the stability of the connection between the nut 2 and the U-shaped screw 5 is effectively improved, when the separation of the nut 2 and the U-shaped screw 5 is required to be realized, the nut is inserted into the straight groove 9-1 through a screwdriver, then press down rotatory piece 9, rotatory piece 9 drives montant 10 and removes, montant 10 drives T shape slide bar 13 and removes extrusion first spring 15, montant 10 drives staving 11 and moves down, staving 11 promotes tooth 17 and removes, tooth 17 contracts gradually and no longer meshes with interior ring gear 8 in second spout 12-2, tooth 17 can' T carry on spacingly to interior ring gear 8 again, then rotatory piece 9, rotatory piece 9 indirectly drives the rotatory and 5 montant separation of U-shaped screw rod of nut 2, first spring 15 and the effectual reset action that plays of setting up of second spring 18, the assurance device normally works, diaphragm 14, the setting of first spacing ring 3 and second spacing ring 19 plays limiting displacement.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. The utility model provides a strong U-shaped bolt assembly of stability for mechanical configuration, includes cavity (1), cavity (1) has fixed connection to constitute between the two halves staving, its characterized in that: the inner symmetrical rotary embedding of the cavity (1) is provided with two nuts (2), the nuts (2) are fixedly sleeved with two first limiting rings (3), the two first limiting rings (3) are positioned in the cavity (1) and are attached to the inner surface of the cavity, the nuts (2) are fixedly sleeved with toothed rings (4), U-shaped screws (5) are arranged under the cavity (1), vertical rods of the U-shaped screws (5) penetrate through the nuts (2), gears (6) are rotatably arranged on the inner top surface of the cavity (1) in an attaching manner, dovetail grooves (1-1) are annularly opened on the inner top surface of the cavity (1), dovetail blocks (7) are slidably arranged in the dovetail grooves (1-1) in an attaching manner, the bottom surfaces of the dovetail blocks (7) are fixedly connected with the top surfaces of the gears (6), the gears (6) are arranged between the two toothed rings (4), and the gears (6) are engaged with the toothed rings (4), the bottom surface of the gear (6) is provided with a groove (6-1), the groove (6-1) is internally provided with an inner toothed ring (8) in a laminating manner, the inner toothed ring (8) is fixedly connected with the inner wall of the gear (6), the cavity (1) is provided with a through hole (1-2), the through hole (1-2) is internally provided with a rotating block (9) in a laminating manner, the top surface of the rotating block (9) is provided with a straight groove (9-1), the bottom surface of the rotating block (9) is fixedly connected with a vertical rod (10), the cross section of the vertical rod (10) is square, the bottom end of the vertical rod (10) penetrates through the through hole (1-2) to penetrate through the gear (6) and penetrate into the groove (6-1), the vertical rod (10) is in sliding connection with the gear (6), the vertical rod (10) is fixedly sleeved with a barrel body (11), and the barrel body (11) is arranged, the top surface of the barrel body (11) is attached to the inner top surface of the gear (6), a polygonal block (12) is arranged under the cavity (1), a first sliding groove (12-1) is formed in the top surface of the polygonal block (12), a T-shaped sliding rod (13) is arranged in the first sliding groove (12-1) in an attaching and sliding mode, the outer cross section of the polygonal block (12) is a regular polygon, the top end of the polygonal block (12) penetrates into the cavity (1) and penetrates into a groove (6-1) to be fixedly connected with a transverse plate (14), the polygonal block (12) is connected with the cavity (1) in a sliding mode, the top end of the T-shaped sliding rod (13) penetrates through the transverse plate (14) to be fixedly connected with the bottom surface of the vertical rod (10), the cross section of the T-shaped sliding rod (13) is circular, the top surface of a cross rod of the T-shaped sliding rod (13) is attached to the bottom surface of the transverse plate (14), and the T-shaped sliding rod (13) is rotatably connected with the transverse plate (14), a first spring (15) is arranged in the first sliding groove (12-1), the first spring (15) is a compression spring, a plurality of second sliding grooves (12-2) are annularly formed in the top surface of the polygonal block (12), a plurality of sections of telescopic rods (16) are arranged in the second sliding grooves (12-2), one end of each section of telescopic rod (16) is fixedly connected with the side wall of the polygonal block (12), teeth (17) are fixedly connected to the other end of each section of telescopic rod (16), one end of each tooth (17) is arranged in the corresponding second sliding groove (12-2) in an attached mode, the cross section of each tooth (17) is a right triangle, the other end of each tooth (17) penetrates through the corresponding second sliding groove (12-2) and penetrates into the corresponding groove (6-1), the second spring (18) is sleeved on each section of telescopic rod (16), the second spring (18) is a compression spring, and a second limiting ring (19) is fixedly sleeved on the polygonal block (12), the bottom surface of the second limiting ring (19) is attached to the inner bottom surface of the cavity (1), and the second limiting ring (19) is arranged in the groove (6-1).
2. A mechanically strong U-bolt assembly according to claim 1 wherein: the gear (6) is made of alloy steel materials.
3. A mechanically strong U-bolt assembly according to claim 1 wherein: the polygonal block (12) and the transverse plate (14) are connected in a welding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110528462.0A CN113175471A (en) | 2021-05-14 | 2021-05-14 | U-shaped bolt assembly with strong stability for mechanical configuration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110528462.0A CN113175471A (en) | 2021-05-14 | 2021-05-14 | U-shaped bolt assembly with strong stability for mechanical configuration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113175471A true CN113175471A (en) | 2021-07-27 |
Family
ID=76928999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110528462.0A Withdrawn CN113175471A (en) | 2021-05-14 | 2021-05-14 | U-shaped bolt assembly with strong stability for mechanical configuration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113175471A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201013703Y (en) * | 2007-01-10 | 2008-01-30 | 中国国际海运集装箱(集团)股份有限公司 | Loosening proof U type bolt component |
| CN201884426U (en) * | 2010-12-21 | 2011-06-29 | 浙江一标紧固件有限公司 | U-shaped bolt with check nut |
| CN210946475U (en) * | 2019-06-27 | 2020-07-07 | 武汉海润工程设备有限公司 | Bridge comb-tooth type expansion joint device with anti-loosening function |
-
2021
- 2021-05-14 CN CN202110528462.0A patent/CN113175471A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201013703Y (en) * | 2007-01-10 | 2008-01-30 | 中国国际海运集装箱(集团)股份有限公司 | Loosening proof U type bolt component |
| CN201884426U (en) * | 2010-12-21 | 2011-06-29 | 浙江一标紧固件有限公司 | U-shaped bolt with check nut |
| CN210946475U (en) * | 2019-06-27 | 2020-07-07 | 武汉海润工程设备有限公司 | Bridge comb-tooth type expansion joint device with anti-loosening function |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210727 |