CN112709745B - Screw fastener - Google Patents
Screw fastener Download PDFInfo
- Publication number
- CN112709745B CN112709745B CN202011529485.5A CN202011529485A CN112709745B CN 112709745 B CN112709745 B CN 112709745B CN 202011529485 A CN202011529485 A CN 202011529485A CN 112709745 B CN112709745 B CN 112709745B
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- Prior art keywords
- screw
- groove
- hydraulic
- pressure regulating
- control
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- 230000007246 mechanism Effects 0.000 claims abstract description 42
- 230000001105 regulatory effect Effects 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 230000001276 controlling effect Effects 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000725 suspension Substances 0.000 description 9
- 230000033001 locomotion Effects 0.000 description 6
- 239000002775 capsule Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 230000005291 magnetic effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
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
- 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
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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
- F16B33/00—Features common to bolt and nut
- F16B33/02—Shape of thread; Special thread-forms
Abstract
The invention discloses a screw fastener which comprises a screw and a fixing shell, wherein a fixing groove with an opening is formed in the fixing shell, a hydraulic mechanism is arranged at one end, away from the opening, of the fixing groove, the hydraulic mechanism is in transmission connection with a plurality of limiting mechanisms capable of limiting the screw, the hydraulic mechanism is connected with a pressure regulating mechanism for controlling the hydraulic pressure in the hydraulic mechanism, and the pressure regulating mechanism is arranged in the inner wall of the fixing shell. According to the invention, two threads with opposite textures are arranged on the screw, so that when the limiting plate limits the screw and applies a torsional force to the screw, the screw can receive two opposite forces along the axis of the screw through the first screw and the second screw, and the screw is prevented from moving in the fixing groove.
Description
Technical Field
The invention relates to the technical field of hardware products, in particular to a screw fastener.
Background
Fasteners are a generic term for a class of mechanical parts used to fasten two or more parts (or components) together as a unit, and screws are one of the most widely used fasteners.
However, the screw fastening part is usually loosened in the current screw fastening process, and particularly, when the screw is frequently subjected to external constantly changing external force, the screw fastening part is not stable enough.
Disclosure of Invention
The invention aims to solve the problem that screw connection is easy to loosen in the prior art, and provides a screw fastener.
In order to achieve the purpose, the invention adopts the following technical scheme:
a screw fastener comprises a screw and a fixed shell, wherein a fixed groove with an opening is formed in the fixed shell, a hydraulic mechanism is arranged at one end, away from the opening, of the fixed groove, the hydraulic mechanism is in transmission connection with a plurality of limiting mechanisms capable of limiting the screw, the hydraulic mechanism is connected with a pressure regulating mechanism for controlling hydraulic pressure in the hydraulic mechanism, and the pressure regulating mechanism is arranged in the inner wall of the fixed shell;
preferably, the screw consists of a head, a first screw rod and a second screw rod, one end of the first screw rod is integrally formed with the head, and the other end of the first screw rod is integrally formed with the second screw rod;
preferably, threads with opposite textures are respectively arranged on the first screw and the second screw, the diameter of the section of the first screw is larger than that of the section of the second screw, a sliding groove is formed in the screw, and a permanent magnet is connected in the sliding groove in a sliding manner;
during operation, can cooperate through screwdriver and cross-shaped groove and realize the rotation to the screw, and then realize the position that the screw precession needs, and because be equipped with on the fixed slot lateral wall with first screw rod matched with screw, when advancing the screw and entering into the fixed slot, rotatory screw this moment, the screw will realize through the cooperation between first screw rod and the fixed slot lateral wall that the rotary motion of screw and then realize that the screw will precession fixed slot or screw out fixed slot.
Preferably, the limiting mechanism comprises a plurality of telescopic cylinders, a plurality of springs and a plurality of limiting plates, wherein the side wall of the fixed groove is provided with a through groove communicated with the fixed groove, one end of each telescopic cylinder is fixedly connected with the through groove, the other end of each telescopic cylinder is fixedly connected with the limiting plate, and the two ends of each spring are respectively and fixedly connected with the limiting plate and the through groove;
during operation, the spring is tension spring, and the spring will have towards the pulling force of spring direction to the limiting plate, and then realize that the limiting plate will be in logical inslot portion under the normality, and then when avoiding the normality down the screw enter into the fixed slot, the limiting plate will block the condition such as motion of screw and take place.
Preferably, one end of the limiting plate, which is far away from the telescopic cylinder, is provided with a thread which can be matched with the second screw, and the limiting plate is of an arc-shaped plate structure; when the screw fixing device works, the limiting plate is better attached to the second screw, so that the position of the limiting plate can be fixed, and the screw is favorably clamped and limited;
preferably, the telescopic cylinder consists of a fixed column, a moving column and a control plate, the fixed column is fixedly connected with the through groove, a control groove is arranged in the fixed column, the control plate is connected in the control groove in a sealing and sliding manner, one end of the moving column penetrates through the side wall of the control groove and is fixedly connected with the control plate, and the other end of the moving column is fixedly connected with the limiting plate;
preferably, the hydraulic mechanism consists of a hydraulic bag and a conduit assembly, the hydraulic bag is fixedly connected with the side wall of one end of the fixing groove far away from the opening, the conduit assembly is arranged inside the side wall of the fixing groove, and the hydraulic bag is communicated with the conduit assembly;
preferably, magnetorheological fluids are contained in the hydraulic bag and the conduit assembly, and the conduit assembly is communicated with the control groove;
during operation, when the hydraulic pressure bag received the extrusion, the hydraulic pressure bag will be pushed into the control flume through inside magnetorheological suspensions this moment, and then realizes that magnetorheological suspensions will promote the control panel and remove in the control flume, and then realizes that the control panel will drive the removal post and remove, and then realizes driving the limiting plate and remove and cooperate the realization spacing to the screw with the second screw rod.
Preferably, the pressure regulating mechanism comprises a pressure regulating cavity, a thread groove, a control rod, a hydraulic plate and a fixed block, the pressure regulating cavity is arranged inside the fixed shell and communicated with the conduit assembly, the hydraulic plate is connected in the pressure regulating cavity in a sealing and sliding manner, one end of the pressure regulating cavity, far away from the conduit assembly, is communicated with the thread groove, the other end of the thread groove is communicated with the outside, the control rod is in threaded connection with the thread groove, the part of the control rod, located outside, is fixedly connected with the fixed block, and the other end of the control rod is located in the pressure regulating cavity and is rotationally connected with the hydraulic plate;
during operation, when the control lever rotated, the control lever would move along thread groove axis direction under the effect of thread groove, and then realized that the control lever would appear this moment and will drive the hydraulic plate and remove in pressure regulating chamber, and then realized changing the pressure of magnetorheological suspensions through the removal realization of hydraulic plate.
Compared with the prior art, the invention has the beneficial effects that:
when the screw constantly precession in the fixed slot, screw thread point-end will contact with the capsule this moment, and then realize that the screw will extrude the capsule, and then realize magnetorheological suspensions in the capsule will make telescopic cylinder extend through the duct subassembly, and then realize the limiting plate will carry on spacingly with the second screw-thread fit to the limiting plate.
Then impel the permanent magnet in the sliding tray, the permanent magnet will make the magnetorheological suspensions in telescopic cylinder, duct subassembly and the hydraulic pressure bag change into solid-state, and then realizes that the fixed cylinder will be unable flexible this moment, and then further ensures the fixed effect of limiting plate to the screw.
According to the invention, two threads with opposite textures are arranged on the screw, so that when the limiting plate limits the screw and applies a torsional force to the screw, the screw can receive two opposite forces along the axis of the screw through the first screw and the second screw, and the screw is prevented from moving in the fixing groove.
Drawings
Fig. 1 is a schematic view of an overall structure of a screw fastener according to the present invention;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 3 is an enlarged view of the structure at B in FIG. 1;
FIG. 4 is a schematic structural diagram of a telescopic cylinder in a screw fastener according to the present invention;
fig. 5 is a schematic view of a radial section structure of a fixing housing in a screw fastener according to the present invention.
In the figure: the hydraulic pressure regulating device comprises a screw 1, a head 11, a first screw 12, a second screw 13, a sliding groove 14, a permanent magnet 15, a pull ring 16, a fixed shell 2, a fixed groove 3, a through groove 31, a hydraulic mechanism 4, a hydraulic bag 41, a conduit assembly 42, a limiting mechanism 5, a telescopic cylinder 51, a fixed column 511, a movable column 512, a control plate 513, a control groove 514, a spring 52, a limiting plate 53, a pressure regulating mechanism 6, a pressure regulating cavity 61, a threaded groove 62, a control rod 63, a hydraulic plate 64 and a fixed block 65.
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.
Referring to fig. 1-5, a screw fastener includes a screw 1 and a fixed housing 2, a fixed slot 3 provided with an opening is provided in the fixed housing 2, one end of the fixed slot 3 away from the opening is provided with a hydraulic mechanism 4, the hydraulic mechanism 4 is in transmission connection with a plurality of limiting mechanisms 5 capable of limiting the screw 1, the hydraulic mechanism 4 is connected with a pressure regulating mechanism 6 for controlling hydraulic pressure in the hydraulic mechanism 4, and the pressure regulating mechanism 6 is provided in an inner wall of the fixed housing 2;
the screw 1 consists of a head 11, a first screw 12 and a second screw 13, one end of the first screw 12 is integrally formed with the head 11, the other end of the first screw 12 is integrally formed with the second screw 13, and the head 11 is provided with a cross-shaped groove;
threads with opposite textures are respectively arranged on the first screw 12 and the second screw 13, the diameter of the section of the first screw 12 is larger than that of the section of the second screw 13, a sliding groove 14 is formed in the screw 1, a permanent magnet 15 is connected in the sliding groove 14 in a sliding manner, the permanent magnet 15 and the sliding groove 14 are tightly attached, the screw 1 is made of ferromagnetic materials, and therefore the permanent magnet 15 and the pull ring 16 have large friction resistance, and the permanent magnet 15 and the pull ring 16 are arranged on the permanent magnet 15, so that the permanent magnet 15 can be conveniently pulled out of the sliding groove 14;
during operation, can cooperate through screwdriver and cross-shaped groove and realize the rotation to screw 1, and then realize 1 precession needs position of screw, and because be equipped with on the fixed slot 3 lateral wall with first screw rod 12 matched with screw, when advancing screw 1 and entering into fixed slot 3, rotatory screw 1 this moment, screw 1 will realize through the cooperation between first screw rod 12 and the fixed slot 3 lateral wall that screw 1's rotary motion and then realize that screw 1 will precession fixed slot 3 or screw out fixed slot 3.
As an embodiment of the present invention, the hydraulic mechanism 4 is composed of a hydraulic bag 41 and a conduit assembly 42, the hydraulic bag 41 is fixedly connected to a side wall of one end of the fixing groove 3 away from the opening, the conduit assembly 42 is disposed inside the side wall of the fixing groove 3, the hydraulic bag 41 is communicated with the conduit assembly 42, and magnetorheological fluids are both contained in the hydraulic bag 41 and the conduit assembly 42;
during operation, the magnetorheological fluid is converted into a solid state under the action of an external magnetic field, for example, when the screw 1 enters the fixing groove 3 and the permanent magnet 15 is pushed into the sliding groove 14, the magnetorheological fluid is converted into the solid state under the action of the permanent magnet 15, and the magnetorheological fluid cannot flow.
As an embodiment of the present invention, the hydraulic mechanism 4 is in transmission connection with a plurality of limiting mechanisms 5 capable of limiting the screw 1, referring to fig. 2, each limiting mechanism 5 is composed of a telescopic cylinder 51, a spring 52 and a limiting plate 53, a through groove 31 communicated with the fixed groove 3 is formed on the side wall of the fixed groove 3, the telescopic cylinders 51 are provided in plurality, one end of each telescopic cylinder 51 is fixedly connected with the through groove 31, the other end of each telescopic cylinder 51 is fixedly connected with the limiting plate 53, the springs 52 are provided in plurality, and two ends of each spring 52 are respectively fixedly connected with the limiting plate 53 and the through groove 31;
during operation, spring 52 is tension spring, and spring 52 will have the pulling force towards spring 52 direction to limiting plate 53, and then realizes that limiting plate 53 will be in logical groove 31 under the normality inside, and then when avoiding screw 1 to enter into fixed slot 3 under the normality, the circumstances such as limiting plate 53 will block the motion of screw 1 take place.
As an embodiment of the present invention, a thread capable of matching with the second screw 13 is disposed at one end of the limiting plate 53 away from the telescopic cylinder 51, and the limiting plate 53 is an arc-shaped plate structure; during operation, limiting plate 53 and second screw 13 will be better laminating, and then can realize fixing the position of limiting plate 53, be favorable to extremely spacing to the card of screw 1.
As an embodiment of the present invention, the telescopic cylinder 51 comprises a fixed column 511, a movable column 512 and a control panel 513, the fixed column 511 is fixedly connected with the through groove 31, a control groove 514 is arranged in the fixed column 511, the control panel 513 is hermetically and slidably connected in the control groove 514, one end of the movable column 512 penetrates through the side wall of the control groove 514 and is fixedly connected with the control panel 513, the other end of the movable column 512 is fixedly connected with the limit plate 53, and the conduit assembly 42 is communicated with the control groove 514;
during operation, when hydraulic pressure bag 41 received the extrusion, hydraulic pressure bag 41 will be pushed into control tank 514 through inside magnetorheological suspensions this moment, and then realize that magnetorheological suspensions will push control panel 513 and remove in control tank 514, and then realize that control panel 513 will drive the removal post 512 and remove, and then realize driving limiting plate 53 and cooperate the realization to screw 1 spacing with second screw 13.
As an embodiment of the present invention, the pressure regulating mechanism 6 is composed of a pressure regulating cavity 61, a thread groove 62, a control rod 63, a hydraulic plate 64 and a fixed block 65, the pressure regulating cavity 61 is arranged inside the fixed housing 2, the pressure regulating cavity 61 is communicated with the conduit assembly 42, the hydraulic plate 64 is hermetically and slidably connected in the pressure regulating cavity 61, one end of the pressure regulating cavity 61, which is far away from the conduit assembly 42, is communicated with the thread groove 62, the other end of the thread groove 62 is communicated with the outside, the control rod 63 is in threaded connection with the thread groove 62, the part of the control rod 63, which is located in the outside, is fixedly connected with the fixed block 65, and the other end of the control rod 63 is located in the pressure regulating cavity 61 and is rotatably connected with the hydraulic plate 64;
during operation, when the control lever 63 rotates, the control lever 63 will move along the axial direction of the thread groove 62 under the action of the thread groove 62, so that the control lever 63 will move the hydraulic plate 64 in the pressure regulating cavity 61, and the pressure of the magnetorheological fluid can be changed by the movement of the hydraulic plate 64.
The specific working process is as follows:
firstly, the screw 1 is placed in the fixing groove 3, then the screw 1 is rotated by the cooperation of the screwdriver and the head 11 of the screw 1, at the moment, the first screw 12 is in threaded connection with the fixing groove 3, and then the screw 1 is continuously screwed into the fixing groove 3 at the moment.
After the screw 1 contacts the hydraulic bag 41, the screw 1 will squeeze the hydraulic bag 41, so that the hydraulic bag 41 will squeeze the magnetorheological fluid into the control groove 514 through the conduit assembly 42, the hydraulic plate 64 in the control groove 514 will move towards the direction of the moving column 512 under the action of the magnetorheological fluid, and the moving column 512 will push the limiting plate 53 to move towards the direction of the screw 1 until the limiting plate 53 is attached to the second screw 13.
Then the permanent magnet 15 is pushed into the sliding groove 14, at this time, the permanent magnet 15 makes the magnetorheological fluid in the device change into a solid state through the magnetic field of the permanent magnet 15, and then the threaded connection between the limiting plate 53 and the second screw 13 is realized.
When the screw 1 receives the effect of torsional force this moment, will produce along the ascending power of fixed slot 3 axial direction between first screw rod 12 and fixed slot 3, second screw rod 13 and the limiting plate 53 this moment, and the opposite mutual offset of direction of the two, and then realize that the screw 1 will be unable to move along fixed slot 3 axial direction this moment, and then realize that the screw 1 will be in the card dead state this moment, the not hard up condition of screw 1 can not appear.
When needs are to take out screw 1, at first pull out permanent magnet 15 from sliding tray 14 through pull ring 16, magnetorheological suspensions will be become liquid this moment, then wrench movement control lever 63, and then realize driving hydraulic plate 64 through control lever 63 and move towards the direction of control lever 63, and then hydraulic plate 64 will inhale pressure regulating chamber 61 with magnetorheological suspensions in telescopic cylinder 51, telescopic cylinder 51 this moment will shorten, and then realize that limiting plate 53 will appear at this moment and second screw 13 separation, and then cancel spacing to screw 1 this moment, and then can be convenient take out screw 1.
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 (3)
1. A screw fastener comprising a screw (1) and a stationary housing (2), characterized in that: a fixing groove (3) with an opening is formed in the fixing shell (2), a hydraulic mechanism (4) is arranged at one end, far away from the opening, of the fixing groove (3), the hydraulic mechanism (4) is in transmission connection with a plurality of limiting mechanisms (5) capable of limiting the screw (1), the hydraulic mechanism (4) is connected with a pressure regulating mechanism (6) for controlling the hydraulic pressure in the hydraulic mechanism (4), and the pressure regulating mechanism (6) is arranged in the inner wall of the fixing shell (2);
the screw (1) consists of a head (11), a first screw (12) and a second screw (13), one end of the first screw (12) is integrally formed with the head (11), and the other end of the first screw (12) is integrally formed with the second screw (13);
threads with opposite textures are respectively arranged on the first screw (12) and the second screw (13), the diameter of the section of the first screw (12) is larger than that of the section of the second screw (13), a sliding groove (14) is arranged inside the screw (1), and a permanent magnet (15) is connected in the sliding groove (14) in a sliding mode;
the limiting mechanism (5) comprises a telescopic cylinder (51), a plurality of springs (52) and a limiting plate (53), a through groove (31) communicated with the fixed groove (3) is formed in the side wall of the fixed groove (3), one end of each telescopic cylinder (51) is fixedly connected with the through groove (31), the other end of each telescopic cylinder (51) is fixedly connected with the limiting plate (53), the springs (52) are provided in a plurality, and two ends of each spring (52) are respectively fixedly connected with the limiting plate (53) and the through groove (31);
threads capable of being matched with the second screw (13) are arranged at one end, away from the telescopic cylinder (51), of the limiting plate (53), and the limiting plate (53) is of an arc-shaped plate structure;
the hydraulic mechanism (4) consists of a hydraulic bag (41) and a conduit assembly (42), the hydraulic bag (41) is fixedly connected with the side wall of one end, far away from the opening, of the fixing groove (3), the conduit assembly (42) is arranged inside the side wall of the fixing groove (3), and the hydraulic bag (41) is communicated with the conduit assembly (42);
magnetorheological fluids are contained in the hydraulic bag (41) and the conduit assembly (42), and the conduit assembly (42) is communicated with the control groove (514).
2. A screw fastener according to claim 1, wherein: the telescopic cylinder (51) is composed of a fixed column (511), a movable column (512) and a control plate (513), the fixed column (511) is fixedly connected with the through groove (31), a control groove (514) is arranged in the fixed column (511), the control plate (513) is connected in the control groove (514) in a sealing and sliding mode, one end of the movable column (512) penetrates through the side wall of the control groove (514) and is fixedly connected with the control plate (513), and the other end of the movable column (512) is fixedly connected with the limiting plate (53).
3. A screw fastener according to claim 1, wherein: pressure regulating mechanism (6) comprise pressure regulating chamber (61), thread groove (62), control lever (63), hydraulic pressure board (64) and fixed block (65), pressure regulating chamber (61) sets up inside fixed casing (2), pressure regulating chamber (61) and duct assembly (42) intercommunication set up, hydraulic pressure board (64) sealed sliding connection is in pressure regulating chamber (61), the one end and the thread groove (62) intercommunication setting of duct assembly (42) are kept away from in pressure regulating chamber (61), the thread groove (62) other end and external intercommunication set up, control lever (63) and thread groove (62) threaded connection, control lever (63) are located external part and fixed block (65) fixed connection, control lever (63) other end is located pressure regulating chamber (61) and rotates with hydraulic pressure board (64) and is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011529485.5A CN112709745B (en) | 2020-12-22 | 2020-12-22 | Screw fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011529485.5A CN112709745B (en) | 2020-12-22 | 2020-12-22 | Screw fastener |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112709745A CN112709745A (en) | 2021-04-27 |
| CN112709745B true CN112709745B (en) | 2022-06-10 |
Family
ID=75545213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011529485.5A Active CN112709745B (en) | 2020-12-22 | 2020-12-22 | Screw fastener |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112709745B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2323161A1 (en) * | 2000-10-16 | 2002-04-16 | Michael George William Woolford | Woolford's pressure equaliser |
| DE102010043589A1 (en) * | 2010-11-08 | 2012-05-10 | Baier & Michels Gmbh & Co. Kg | Thread-generating nut, blank for producing the nut and screw connection of nut and bolt |
| CN104632849A (en) * | 2013-11-07 | 2015-05-20 | 西安道恒交通设备科技有限公司 | Thread looseness prevention structure |
| CN206626069U (en) * | 2017-03-09 | 2017-11-10 | 重庆宏生机电有限责任公司 | Reverse bolt structure |
| CN208651395U (en) * | 2018-05-10 | 2019-03-26 | 宁波斯立福精密工业有限公司 | A kind of novel hydraulic nut |
| CN108644215A (en) * | 2018-07-24 | 2018-10-12 | 合肥仨力机械制造有限公司 | A kind of Multifunctional bolt |
| CN109026949A (en) * | 2018-08-13 | 2018-12-18 | 徐州圣旺达液压机械有限公司 | A kind of hydraulic cylinder mounting device with protective shell |
| CN211975625U (en) * | 2020-01-06 | 2020-11-20 | 上海本安实业发展有限公司 | High-strength anti-loosening hydraulic bolt |
-
2020
- 2020-12-22 CN CN202011529485.5A patent/CN112709745B/en active Active
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| CN112709745A (en) | 2021-04-27 |
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Effective date of registration: 20220526 Address after: 255000 Road East, 3km north of Linzi Expressway intersection, Zibo City, Shandong Province Applicant after: Zibo qimeite Chemical Equipment Co.,Ltd. Address before: 100000 room 1201, building 11, huishixin garden, Guangcai Road, dahongmen street, Fengtai District, Beijing Applicant before: Xu Zhipei |
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