CN108691870B - Split bolt - Google Patents
Split bolt Download PDFInfo
- Publication number
- CN108691870B CN108691870B CN201810600362.2A CN201810600362A CN108691870B CN 108691870 B CN108691870 B CN 108691870B CN 201810600362 A CN201810600362 A CN 201810600362A CN 108691870 B CN108691870 B CN 108691870B
- Authority
- CN
- China
- Prior art keywords
- bolt
- stud
- head
- locking
- locking column
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005260 corrosion Methods 0.000 claims abstract description 7
- 230000007797 corrosion Effects 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 238000009434 installation Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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
- F16B35/02—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws divided longitudinally
-
- 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
- F16B37/00—Nuts or like thread-engaging members
- F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
- F16B37/041—Releasable devices
- F16B37/042—Releasable devices locking by rotation
-
- 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
-
- 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
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
Abstract
The invention provides a split bolt, which comprises: a bolt head; one end of the bolt sleeve is connected with the bolt head, and the bolt sleeve is provided with internal threads; one end of the stud can extend into the bolt sleeve and is in threaded connection with the bolt sleeve, and a through hole which is penetrated along the axial direction is formed in the stud; the locking column can axially slide and penetrate through the through hole, the locking column is circumferentially fixed with the stud, one end of the locking column is a locking head which can be spliced with the bolt head, and the locking column can be spliced with the bolt head through sliding and circumferentially positioned; the compressing piece is arranged at the other end of the stud and can axially position the locking column by compressing the other end of the locking column. The invention solves the problem that the bolt cannot be replaced because the bolt head is buried, solves the problem that the bolt connection strength and rigidity are reduced because of corrosion, and also solves the problem that the bolt is loosened in the use process.
Description
Technical Field
The invention relates to a connecting piece, in particular to a split bolt convenient for single-side replacement.
Background
The underground steel pipe gallery is formed by splicing a plurality of corrugated steel pipe sheets through connecting bolts, and the service life of the main body is 100 years. Due to the severe underground environment, the bolts need to be periodically protected and replaced during the design life due to humidity, corrosion and the like.
But underground steel pipe gallery belongs to cylindric container, and the direct engineering in pipe gallery outside is backfilled, leads to the bolt head to hide the landfill in the soil layer, so, in underground steel pipe gallery fortune dimension in-process, can't change connecting bolt.
Disclosure of Invention
The invention aims to provide a split bolt so as to solve the problem that the bolt cannot be replaced because the bolt head is buried.
In order to achieve the above object, the present invention provides a split bolt, comprising: a bolt head; one end of the bolt sleeve is connected with the bolt head, and the bolt sleeve is provided with internal threads; one end of the stud can extend into the bolt sleeve and is in threaded connection with the bolt sleeve, and a through hole penetrating along the axial direction is formed in the stud; the locking column can axially slide to penetrate through the through hole, the locking column is circumferentially fixed with the stud, one end of the locking column is a locking head which can be inserted with the bolt head, and the locking column can be inserted with the bolt head in a sliding manner and circumferentially positioned; the compressing piece is arranged at the other end of the stud and can axially position the locking column by compressing the other end of the locking column.
The split bolt is characterized in that the locking column is circumferentially fixed with the stud through key connection, a key is fixedly connected to the inner side wall of the stud along the axial direction, a key groove is formed in the outer side wall of the locking column, the length of the key groove is larger than that of the key, and the locking column can slide along the key.
The split bolt is characterized in that the end part of the bolt head is provided with the anti-rotation boss, the end part of the locking head is provided with the anti-rotation groove matched with the anti-rotation boss, and the anti-rotation boss can be embedded into the anti-rotation groove.
The split bolt is characterized in that the outer side wall of the stud is provided with the screwing stopping mark, and the anti-rotation boss is aligned with the anti-rotation groove in a state that the screwing stopping mark is aligned with the end face of the other end of the bolt sleeve.
The split bolt is characterized in that the pressing piece is a pressing piece, one end of the pressing piece is connected with the end face of the stud, and the other end of the pressing piece is tightly pressed against the end face of the other end of the locking column.
The split bolt comprises the locking head, the stud and the bolt sleeve, wherein the locking head extends out of the stud, the inner diameter of one end of the bolt sleeve is larger than the diameter of the locking head, and a sliding space for the locking head to axially slide is formed in one end of the bolt sleeve.
The split bolt comprises the locking head, wherein the diameter of the locking head is equal to the outer diameter of the stud, the locking head is provided with external threads, and the locking head can be in butt joint with the stud to form continuous external threads.
The split bolt as described above wherein the locking head has a diameter less than the outer diameter of the stud.
The split bolt comprises the split bolt, wherein one end of the stud is provided with the right-handed external thread, and the internal thread of the bolt sleeve is the right-handed internal thread; the other end of the stud is also provided with left-handed external threads.
The split bolt as described above wherein the bolt head and the bolt sleeve are each made of a corrosion resistant material.
The split bolt has the characteristics and advantages that:
1. the split bolt is of a split structure, when the bolt is required to be replaced, the fastening nut, the pressing piece, the stud and the locking column which are positioned on one side of the large plane part or the closed container are detached and replaced, and the bolt head which is hidden or buried on the other side of the large plane part or the closed container is not required to be detached, so that the operation of detaching and replacing the bolt can be completed on one side of the large plane part or the closed container, the problem that the bolt cannot be replaced due to the fact that the bolt head is buried is solved, the problem that the bolt connection strength and rigidity are reduced due to corrosion is solved through replacing the bolt, and the service life of the bolt is prolonged; in addition, the split bolt is provided with a bolt sleeve, a stud and a locking column which are mutually limited and positioned, so that the problem of loosening of the bolt in the use process can be solved;
2. according to the split bolt, the external threads with different rotation directions are arranged at the two ends of the stud, so that the bolt can be further prevented from loosening in the use process;
3. the split bolt is convenient to assemble and disassemble, and can realize that different parts are made of different materials, so that the cost is reduced.
Drawings
The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention. Wherein:
FIG. 1 is a schematic illustration of a split bolt of the present invention in a locked post unlocked condition;
FIG. 2 is a schematic view of the split bolt of the present invention in a locked condition of the locking post;
FIG. 3 is a front view of the bolt head of the present invention;
fig. 4 is a top view of the bolt head of fig. 3.
Reference numerals for main elements:
1. a bolt head; 11. anti-rotation boss; 2. a bolt sleeve; 3. a stud; 4. locking the column; 41. a locking head; 42. an anti-rotation groove; 5. a pressing member; 6. a key; 7. a sliding space; 8. a gasket; 9. a fastening nut; 10. a hand piece; 100. a first connected member; 200. and a second connected member.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides a split bolt for connecting a first connected member 100 and a second connected member 200, for example, the first connected member 100 and the second connected member 200 are corrugated steel pipe sheets of an underground steel pipe gallery, and the split bolt comprises a bolt head 1, a bolt sleeve 2, a stud 3, a locking post 4 and a pressing member 5;
the bolt sleeve 2 is sleeve-shaped, one end of the bolt sleeve 2 is connected with the bolt head 1, preferably, the bolt sleeve 2 is coaxially connected with the bolt head 1, and the bolt sleeve 2 is provided with internal threads;
one end of the stud 3 can extend into the bolt sleeve 2 and is in threaded connection with the bolt sleeve 2, and a through hole which is penetrated along the axial direction is formed in the stud 3, and is preferably a central through hole of the stud 3;
the locking column 4 can axially slide and penetrate through the through hole, the locking column 4 and the stud 3 are circumferentially fixed, namely the locking column 4 and the stud 3 cannot relatively rotate, one end of the locking column 4 is provided with a locking head 41 which can be spliced with the bolt head 1, the locking column 4 can be spliced with the bolt head 1 through sliding and circumferentially positioned, namely the locking column 4 and the bolt head 1 cannot relatively rotate in a state that the locking head 41 is spliced with the bolt head 1;
the compressing piece 5 is arranged at the other end of the stud 3, and can axially position the locking column 4 by compressing the other end of the locking column 4.
When the split bolt is installed, the bolt sleeve 2 is firstly extended into the bolt hole of the connected piece, and the bolt head 1 is propped against the outer side of the connected piece; then screwing the stud 3 together with the locking post 4 into the bolt sleeve 2 to a proper depth; then, the locking column 4 is slid towards the bolt head 1, so that the locking head 41 of the locking column 4 is spliced with the bolt head 1, the circumferential position of the locking column 4 is fixed, the locking column 4 cannot rotate relative to the bolt head 1, and the stud 3 cannot rotate relative to the bolt head 1 any more; then the other end of the locking column 4 is pressed by the pressing piece 5, at the moment, the axial position of the locking column 4 is fixed, and the locking column 4 can not axially slide relative to the stud 3 any more; finally, screwing a fastening nut 9 into the other end of the stud 3, so as to finish the installation of the split bolt; because the circumferential position and the axial position of the locking column 4 are fixed, and the locking column 4 and the stud 3 are mutually limited and positioned, the looseness of the bolt in the use process can be effectively avoided.
When the bolts need to be replaced, the disassembly operation is opposite to the above-described installation operation.
The split bolt is particularly suitable for connection of large plane parts (such as corrugated steel pipe sheets of underground steel pipe gallery) or connection of closed containers, when the bolt needs to be replaced, the fastening nut 9, the pressing piece 5, the stud 3 and the locking column 4 which are positioned on one side of the large plane part or the closed container are detached and replaced, and the bolt head 1 which is hidden or buried on the other side of the large plane part or the closed container does not need to be detached, so that the operation of detaching and replacing the bolt can be completed on one side of the large plane part or the closed container, and the problem of reduced bolt connection strength and rigidity caused by corrosion is solved.
As further shown in fig. 1, in one embodiment, the locking post 4 is secured circumferentially to the stud 3 by a keyed connection, such as, but not limited to, a flat key, spline connection.
Further, a key 6 is fixedly connected to the inner side wall of the stud 3 along the axial direction, a key groove is formed in the outer side wall of the locking column 4 along the axial direction, and the length of the key groove is larger than that of the key 6, so that the locking column 4 can slide along the key 6 along the axial direction.
However, the present invention is not limited thereto, and the locking post 4 and the stud 3 may be fixed circumferentially by a pin connection, for example, a pin is fixed radially on an inner side wall of the stud 3, a chute is formed on an outer side wall of the locking post 4 in an axial direction, the pin extends into the chute, and the locking post 4 can only slide axially and cannot rotate circumferentially under a limiting effect of the pin.
Of course, a sliding groove may be formed on the inner side wall of the stud 3 in the axial direction, and a pin may be fixed on the outer side wall of the locking post 4 in the radial direction.
As shown in fig. 2, 3 and 4, in another embodiment, the end of the bolt head 1 is provided with an anti-rotation boss 11, the end of the locking head 41 is provided with an anti-rotation groove 42 matched with the anti-rotation boss 11, and the anti-rotation boss 11 can be embedded into the anti-rotation groove 42.
Further, the anti-rotation boss 11 is a wedge-shaped boss, a sheet-shaped boss or a zigzag boss, and correspondingly, the anti-rotation groove 42 is a wedge-shaped groove, a rectangular groove or a zigzag groove.
However, the present invention is not limited thereto, and an anti-rotation groove may be provided at the end of the bolt head 1, and an anti-rotation boss that mates with the anti-rotation groove may be provided at the end of the locking head 41.
In the embodiment shown in fig. 1, the compressing member 5 is a compressing piece, one end of which is connected with the end face of the stud 3, and the other end of which compresses the locking post 4 by being tightly attached to the end face of the other end of the locking post 4. For example, the number of the pressing pieces is two, the two pressing pieces are symmetrically welded on the end face of the stud 3, the pressing pieces are preferably steel sheets, and the shape of the pressing pieces can be rectangular, square or oval.
Further, the end face of the other end of the locking column 4 is connected with the hand piece 10, and when the hand piece 10 is operated, the hand piece 10 slides or rotates the locking column 4, so that the operation is very convenient, for example, the hand piece 10 is a thin plate, an opening is formed in the hand piece 10, and fingers can conveniently extend into the opening to push down or lift the locking column 4.
As shown in fig. 1 and 2, in a preferred embodiment, the locking head 41 protrudes out of the stud 3, and an inner diameter of an end of the bolt housing 2 near the bolt head 1 is larger than a diameter of the locking head 41 to form a sliding space 7 for axially sliding the locking head 41 inside the bolt housing 2. When the bolt is installed, the stud 3 is screwed into the bolt sleeve 2 to a proper depth, so that the anti-rotation groove 42 of the locking head 41 is aligned with the anti-rotation boss 11 of the bolt head 1, and then the locking column 4 is pressed down towards the bolt head 1, so that the locking head 41 slides in the sliding space 7 until the locking head 41 is spliced with the bolt head 1.
Further, in order to facilitate the judgment of the screwing depth of the stud 3, a screwing stop mark is provided on the outer sidewall of the stud 3, the distance between the screwing stop mark and the end face of one end of the stud 3 (i.e., the end of the stud 3 extending into the bolt sleeve 2) is the required screwing depth, and in a state that the screwing stop mark aligns with the end face of the other end of the bolt sleeve 2 (i.e., the end of the bolt sleeve 2 away from the bolt head 1), the anti-rotation boss 11 aligns with the anti-rotation groove 42, and at this time, the locking post 4 is slid toward the bolt head 1, so that the locking head 41 can be inserted into the bolt head 1.
As shown in fig. 1 and 2, in one possible technical solution, the diameter of the locking head 41 is equal to the outer diameter of the stud 3, the locking head 41 has an external thread, and the locking head 41 can be abutted with the stud 3 to form a continuous external thread, that is, the locking head 41 is tightly abutted with the stud 3, and the external thread of the locking head 41 is connected with the external thread of the stud 3 to form a continuous external thread. With this arrangement, the locking post 4 is screwed into the bolt housing 2 simultaneously with the stud 3 until the locking head 41 enters the sliding space 7.
In another possible technical scheme, the diameter of the locking head 41 is smaller than the outer diameter of the stud 3, and external threads are not required to be arranged on the outer wall of the locking head 41, and as the locking column 4 is circumferentially fixed with the stud 3, the locking column 4 can be screwed into the bolt sleeve 2 under the driving of the stud 3, and after the stud 3 is screwed into the bolt sleeve 2 to a proper depth, the locking column 4 is slid, so that the locking head 41 is spliced with the bolt head 1. In this embodiment, the diameter of the locking head 41 is preferably larger than the inner diameter of the stud 3, so that the stud 3 limits the sliding locking head 41.
In another preferred embodiment, one end of the stud 3 has a right-handed external thread, and correspondingly, the internal thread of the bolt housing 2 is a right-handed internal thread; the other end of the stud 3 is also provided with a left-handed external thread, and when in use, the washer 8 is sleeved at the other end of the stud 3 and then the fastening nut 9 is screwed in.
In this embodiment, the right-handed external thread and the left-handed external thread are respectively disposed at two ends of the stud 3, so that the screw directions of the two sections of the stud 3 are different, and the loosening of the bolt in the use process can be further prevented.
The bolt is a split bolt, so that all parts of the bolt can be made of different materials. Since the bolt head 1 and the bolt sleeve 2 are non-exchangeable, a long service life is required, both the bolt head 1 and the bolt sleeve 2 are made of a corrosion resistant material, such as stainless steel or other existing corrosion resistant steel; the stud 3 and the locking head 41 are replaceable, so that 8.8-grade bolt materials can be selected; the key 6 belongs to a connecting piece, and can be used for calculating according to shearing force, and 45# steel or other materials can be selected; the washer 8 and the tightening nut 9 may be selected from common national standard such as 65Mn washer, class 8 nut. It should be noted that, the common bolt and nut connection is selected from 8.8-stage bolts and 8-stage nuts.
The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention. It should be noted that, the components of the present invention are not limited to the above-mentioned overall application, and each technical feature described in the specification of the present invention may be selected to be used singly or in combination according to actual needs, so that other combinations and specific applications related to the present invention are naturally covered by the present invention.
Claims (7)
1. A split bolt, characterized in that the split bolt comprises:
a bolt head;
one end of the bolt sleeve is connected with the bolt head, and the bolt sleeve is provided with internal threads;
one end of the stud can extend into the bolt sleeve and is in threaded connection with the bolt sleeve, and a through hole penetrating along the axial direction is formed in the stud;
the locking column can axially slide to penetrate through the through hole, the locking column is circumferentially fixed with the stud, one end of the locking column is a locking head which can be inserted with the bolt head, and the locking column can be inserted with the bolt head in a sliding manner and circumferentially positioned; the locking column is circumferentially fixed with the stud through key connection, a key is axially fixedly connected to the inner side wall of the stud, a key groove is formed in the outer side wall of the locking column, the length of the key groove is larger than that of the key, and the locking column can slide along the key; the end part of the bolt head is provided with an anti-rotation boss, the end part of the locking head is provided with an anti-rotation groove matched with the anti-rotation boss, and the anti-rotation boss can be embedded into the anti-rotation groove;
the compressing piece is arranged at the other end of the stud and can axially position the locking column by compressing the other end of the locking column; the compressing piece is a compressing piece, one end of the compressing piece is connected with the end face of the stud, and the other end of the compressing piece compresses the locking column by tightly clinging to the end face of the other end of the locking column.
2. The split bolt according to claim 1, wherein a stop screw mark is provided on an outer side wall of the stud, and the rotation preventing boss is aligned with the rotation preventing groove in a state that the stop screw mark is aligned with the other end face of the bolt housing.
3. A split bolt according to any one of claims 1 to 2, wherein the locking head extends out of the stud, the inner diameter of one end of the bolt housing is larger than the diameter of the locking head, and a sliding space for the locking head to slide axially is formed inside one end of the bolt housing.
4. A split bolt according to claim 3 wherein the locking head has a diameter equal to the outer diameter of the stud, the locking head having an external thread, the locking head being capable of interfacing with the stud to form a continuous external thread.
5. A split bolt according to claim 3 wherein the locking head has a diameter less than the outer diameter of the stud.
6. The split bolt of any one of claims 1 to 2, wherein one end of the stud has right-handed external threads and the internal threads of the bolt housing are right-handed internal threads; the other end of the stud is also provided with left-handed external threads.
7. Split bolt according to any of claims 1-2, wherein the bolt head and the bolt sleeve are both made of a corrosion resistant material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810600362.2A CN108691870B (en) | 2018-06-12 | 2018-06-12 | Split bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810600362.2A CN108691870B (en) | 2018-06-12 | 2018-06-12 | Split bolt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108691870A CN108691870A (en) | 2018-10-23 |
| CN108691870B true CN108691870B (en) | 2024-02-06 |
Family
ID=63848837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810600362.2A Active CN108691870B (en) | 2018-06-12 | 2018-06-12 | Split bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108691870B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3800361A1 (en) * | 2019-10-02 | 2021-04-07 | Siemens Aktiengesellschaft | Anchoring unit, method for fixing an installation with an anchoring unit and installation unit with anchoring unit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3165929U (en) * | 2010-11-30 | 2011-02-10 | 株式会社ヤマザキアクティブ | Loosening bolt |
| CN206582218U (en) * | 2017-03-13 | 2017-10-24 | 苏州嘉翔展示道具有限公司 | A kind of fastening bolt |
| CN107939804A (en) * | 2018-01-02 | 2018-04-20 | 福建泉州市金正机械有限公司 | A kind of double rod bolt |
| CN208311223U (en) * | 2018-06-12 | 2019-01-01 | 中冶京诚工程技术有限公司 | A kind of Split type bolt |
-
2018
- 2018-06-12 CN CN201810600362.2A patent/CN108691870B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3165929U (en) * | 2010-11-30 | 2011-02-10 | 株式会社ヤマザキアクティブ | Loosening bolt |
| CN206582218U (en) * | 2017-03-13 | 2017-10-24 | 苏州嘉翔展示道具有限公司 | A kind of fastening bolt |
| CN107939804A (en) * | 2018-01-02 | 2018-04-20 | 福建泉州市金正机械有限公司 | A kind of double rod bolt |
| CN208311223U (en) * | 2018-06-12 | 2019-01-01 | 中冶京诚工程技术有限公司 | A kind of Split type bolt |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108691870A (en) | 2018-10-23 |
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