CN111425512A - Anti-loosening bolt and nut assembly - Google Patents
Anti-loosening bolt and nut assembly Download PDFInfo
- Publication number
- CN111425512A CN111425512A CN202010380281.3A CN202010380281A CN111425512A CN 111425512 A CN111425512 A CN 111425512A CN 202010380281 A CN202010380281 A CN 202010380281A CN 111425512 A CN111425512 A CN 111425512A
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- CN
- China
- Prior art keywords
- expansion sleeve
- nut
- main bolt
- bolt
- circular
- 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.)
- Pending
Links
- 230000006835 compression Effects 0.000 claims abstract description 21
- 238000007906 compression Methods 0.000 claims abstract description 21
- 229910000639 Spring steel Inorganic materials 0.000 claims description 3
- 210000004907 gland Anatomy 0.000 abstract description 8
- 230000002265 prevention Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 229910000576 Laminated steel Inorganic materials 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007779 soft material Substances 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000007704 transition Effects 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
- F16B39/22—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
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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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- 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
- F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
Abstract
The invention discloses an anti-loosening bolt and nut assembly which comprises a main bolt and a circular expansion sleeve. The circular expansion sleeve is sleeved on the periphery of the main bolt. Wherein, the lower extreme of kingbolt is established and is installed the cover gland nut that rises through the inside bottom cover of circular cover that rises. Wherein, the lower side of the expansion sleeve gland nut on the main bolt is sleeved with a belleville spring washer. And the bottom end of the main bolt is positioned at the periphery of the expansion sleeve compression nut and the butterfly spring washer, and is sleeved with a main bolt tensioning nut. Wherein, the periphery of the circular expansion sleeve is provided with a connected piece through a main bolt tightening nut. Therefore, the anti-loosening bolt and nut assembly has the advantages of simple structure of the whole device, vibration resistance and looseness prevention, convenience in disassembly and assembly, repeated use for many times, and higher stability and practicability.
Description
Technical Field
The invention relates to the technical field of machine manufacturing, in particular to an anti-loosening bolt and nut assembly.
Background
At present, the anti-loosening technology of threaded connection mainly comprises three types: friction locking, mechanical locking and thread pair damage locking. The anti-loosening requirement of the threaded connection mainly needs to ensure that the nut, namely the internal thread, is constant relative to the bolt, namely the axial position of the external thread, in the service process, even if the thickness of a fastener is reduced or the thickness of the fastener disappears, but the anti-loosening failure caused by the decline of pretightening force exists in the friction anti-loosening process, the mechanical anti-loosening process has the difficulty of re-tightening and tightening torque, and the defect that the torque requirement cannot be reused when the anti-loosening of a thread pair is damaged, namely the tail of the thread pair is damaged by a punch or the gap of the thread pair is solidified. Particularly, for a fastened piece with a screw hole formed in a soft material, transition threads or interference threads with the increased pitch diameter of the external threads are mainly applied to solve the problem of loosening in the service process, and the fastened piece with the light hole formed is also made of the soft material and is easy to loosen, so that the fastened piece cannot be reused.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a bolt and nut assembly capable of preventing loosening, which is simple in structure, has the effects of vibration resistance and looseness prevention, is convenient to disassemble and assemble, can be repeatedly used for many times, and is high in stability and practicability.
In order to achieve the purpose, the invention provides an anti-loosening bolt and nut assembly which comprises a main bolt and a circular expansion sleeve. The circular expansion sleeve is sleeved on the periphery of the main bolt. Wherein, the lower extreme of kingbolt is established and is installed the cover gland nut that rises through the inside bottom cover of circular cover that rises. Wherein, the lower side of the expansion sleeve gland nut on the main bolt is sleeved with a belleville spring washer. And the bottom end of the main bolt is positioned at the periphery of the expansion sleeve compression nut and the butterfly spring washer, and is sleeved with a main bolt tensioning nut. Wherein, the periphery of the circular expansion sleeve is provided with a connected piece through a main bolt tightening nut.
In an embodiment of the invention, the top end of the main bolt adopts a fixing structure with an external hexagonal bottom circular flange arranged at the top, the periphery of the bottom end of the main bolt is provided with external threads matched with the tightening nut of the main bolt, the middle section of the main bolt is a tapered rod part, and the outer tapered surface of the rod part is matched with the inner hole tapered surface of the circular expansion sleeve.
In one embodiment of the invention, the circular expansion sleeve is an elastic sleeve with an axial opening, the circular expansion sleeve is made of spring steel, an inner hole conical surface is arranged inside the circular expansion sleeve, and the outer side surface of the circular expansion sleeve is a cylindrical surface and is coaxial with the inner hole conical surface.
In one embodiment of the present invention, the bottom end of the expansion sleeve compression nut is in a circular flange surface structure, and the top end of the expansion sleeve compression nut is in an external hexagonal structure.
In an embodiment of the present invention, a counter bore is provided at the top end of the main bolt tensioning nut, a blind hole is provided at the inner bottom end of the main bolt tensioning nut, and an internal thread is provided on the inner wall of the main bolt tensioning nut.
In an embodiment of the present invention, the connected pieces are provided with a plurality of groups, and the top of the connected pieces is provided with an inner hole, and the size of the inner hole matches with that of the circular expansion sleeve.
Compared with the prior art, the anti-loosening bolt and nut assembly has the advantages of simple and reasonable structure, vibration resistance and looseness prevention, convenience in assembling and applying the existing tightening equipment, and convenience in tightening and loosening during inspection and maintenance. The novel laminated rotor is suitable for fastening laminated rotors, laminated steel plates and the like at normal temperature, is convenient to disassemble and assemble, can be repeatedly used for many times, and is high in stability and practicability.
Drawings
FIG. 1 is a perspective view of an anti-loosening bolt and nut assembly according to one embodiment of the present invention;
FIG. 2 is a schematic view of the internal structure of an anti-loosening bolt and nut assembly according to an embodiment of the present invention;
FIG. 3 is an exploded view of the anti-loosening bolt and nut assembly according to one embodiment of the present invention;
FIG. 4 is a schematic view of an installation structure of the anti-loose bolt and nut assembly connecting connected pieces according to an embodiment of the invention.
Description of the main reference numerals:
1-main bolt, 2-circular expansion sleeve, 3-expansion sleeve compression nut, 4-belleville spring washer, 5-main bolt tightening nut and 6-connected piece.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Fig. 1 is a perspective view of a bolt and nut assembly according to an embodiment of the present invention. Fig. 2 is a schematic view of the internal structure of the anti-loosening bolt and nut assembly according to an embodiment of the present invention. FIG. 3 is an exploded view of the anti-loosening bolt and nut assembly according to one embodiment of the present invention. FIG. 4 is a schematic view of an installation structure of the anti-loose bolt and nut assembly connecting connected pieces according to an embodiment of the invention.
As shown in fig. 1 to 4, a loosening prevention bolt and nut assembly according to a preferred embodiment of the present invention includes a main bolt 1, a circular expansion sleeve 2, an expansion sleeve compression nut 3, and a belleville washer 4, and a main bolt tension nut 5. The top end of the main bolt 1 is provided with an outer hexagonal bottom circular flange fixing structure at the top. The periphery of the bottom end of the main bolt 1 is provided with an external thread matched with the main bolt tensioning nut 5, the middle section of the main bolt 1 is a tapered rod part, and the inner hole conical surface of the circular expansion sleeve 2 on the outer conical surface of the rod part is matched and installed. The peripheral cover of kingbolt 1 is equipped with circular cover 2 that rises, and circular cover 2 that rises is an axial open-ended elastic sleeve, and circular cover 2 that rises adopts the spring steel material, and the inside of circular cover 2 that rises is equipped with the hole conical surface. The outer side surface of the circular expansion sleeve 2 is a cylindrical surface and is coaxial with the conical surface of the inner hole. The lower extreme of kingbolt 1 runs through the inside bottom cover of circular cover 2 that rises and establishes and install cover gland nut 3 that rises, and the bottom of cover gland nut 3 that rises is circular flange face structure, and the top of cover gland nut 3 that rises is outer hexagonal shape structure.
And a belleville spring washer 4 is sleeved on the lower side of the expansion sleeve compression nut 3 on the main bolt 1. The bottom end of the main bolt 1 is positioned at the periphery of the expansion sleeve compression nut 3 and the butterfly spring washer 4, and a main bolt tensioning nut 5 is sleeved and installed. The top end of the main bolt tensioning nut 5 is provided with a counter bore. The inside bottom of main bolt straining nut 5 is equipped with the blind hole, and 5 inner walls of main bolt straining nut are equipped with the internal thread. The periphery of the circular expansion sleeve 2 is provided with a connected piece 6 through a main bolt tightening nut 5, the connected piece 6 is provided with a plurality of groups, the top of the connected piece 6 is provided with an inner hole, and the size of the inner hole is matched with that of the circular expansion sleeve 2.
The main bolt tensioning nut 5 is arranged to rotate relative to the main bolt 1 to be tightened to generate axial movement, the disc spring washer 4 is driven to rotate by friction force generated by the joint end face of the main bolt tensioning nut 5 and the disc spring washer 4, and the expansion sleeve compression nut 3 is driven to rotate relative to the main bolt by friction force generated by the joint end face of the disc spring washer 4 and the zero expansion sleeve compression nut 3. And the expansion sleeve compression nut 3 rotates to generate axial movement, so that the circular expansion sleeve 2 is pushed to move axially along the axis of the rod part of the main bolt 1. When the circular expansion sleeve 2 axially moves and radially expands simultaneously, and the outer cylindrical surface of the circular expansion sleeve 2 and the inner hole surface of each connected piece 6 reach a specified torque value, the outer cylindrical surface of the circular expansion sleeve 2 is fully attached to and completely pressed against the inner hole surface of each connected piece 6. The inner space of each fastened part hole is sealed by materials, and the loosening process is just opposite when the effect of vibration resistance and loosening prevention is achieved. Firstly screwing out the main bolt tensioning nut 5, then screwing out the expansion sleeve compression nut 3, drawing out the main bolt 1, and then pushing out the circular expansion sleeve 2 by using the cylindrical rod. The whole device has simple structure and vibration-resistant and anti-loose effect, is convenient to assemble and apply the existing tightening equipment, is convenient to tighten and loosen during inspection and maintenance, is suitable for fastening of laminated rotors, laminated steel plates and the like at normal temperature, and can be repeatedly used for many times and has higher stability and practicability when being convenient to disassemble and assemble.
In practical application, the working process of the anti-loosening bolt and nut assembly is as follows: in use, axial movement is generated by rotational tightening of the kingbolt-tightening nut 5 relative to the kingbolt 1. The disc spring washer 4 is rotated by the frictional force generated by the joint end surface of the main bolt tightening nut 5 and the disc spring washer 4. And then the expansion sleeve compression nut 3 rotates relative to the main bolt through the friction force generated by the joint end surface of the disc-shaped spring pad 4 and the zero expansion sleeve compression nut 3. And the expansion sleeve compression nut 3 rotates to generate axial movement, so that the circular expansion sleeve 2 is pushed to axially move along the axis of the rod part of the main bolt 1, and the circular expansion sleeve 2 expands along the radial direction in the axial movement process. When the outer cylindrical surface and the inner hole surface of each connected piece 6 reach the specified torque value, the outer cylindrical surface of the circular expansion sleeve 2 is fully attached to and completely pressed against the inner hole surface of each connected piece 6. The material that has formed in each part downthehole space fastened seals, reaches the locking effect of nai shake and tears the pine process open and then just opposite, screws out the jack-up nut 5 earlier, screws out the cover gland nut that rises 3 again, takes out jack-up 1, and circular cover 2 that rises is released to reuse cylinder stick, and overall device simple structure has the locking effect of nai shake.
In a word, the anti-loosening bolt and nut assembly is simple and reasonable in structure, has the effects of vibration resistance and loosening prevention, is convenient to assemble and apply the existing tightening equipment, and is convenient to tighten and loosen during inspection and maintenance. The novel laminated rotor is suitable for fastening laminated rotors, laminated steel plates and the like at normal temperature, is convenient to disassemble and assemble, can be repeatedly used for many times, and is high in stability and practicability.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (6)
1. An anti-loosening bolt and nut assembly, comprising:
a main bolt; and
the circular expansion sleeve is sleeved on the periphery of the main bolt;
the lower end of the main bolt penetrates through the inner bottom end of the circular expansion sleeve and is sleeved with an expansion sleeve compression nut;
a butterfly spring washer is sleeved on the main bolt and positioned on the lower side of the expansion sleeve compression nut;
the bottom end of the main bolt is positioned at the peripheries of the expansion sleeve compression nut and the butterfly spring washer, and a main bolt tensioning nut is sleeved and installed on the peripheries of the expansion sleeve compression nut and the butterfly spring washer; and
and the periphery of the circular expansion sleeve is provided with a connected piece through the main bolt tightening nut.
2. The anti-loosening bolt-nut assembly according to claim 1, wherein the top end of the main bolt is provided with a bottom circular flange fixing structure with an outer hexagonal shape at the top, the periphery of the bottom end of the main bolt is provided with an external thread matched with the tightening nut of the main bolt, the middle section of the main bolt is a tapered rod part, and the outer tapered surface of the rod part is matched with the inner hole tapered surface of the circular expansion sleeve.
3. The anti-loosening bolt and nut assembly according to claim 1, wherein the circular expansion sleeve is an elastic sleeve with an axial opening, the circular expansion sleeve is made of spring steel, an inner hole conical surface is arranged inside the circular expansion sleeve, and the outer side surface of the circular expansion sleeve is a cylindrical surface and is coaxial with the inner hole conical surface.
4. The anti-loosening bolt and nut assembly according to claim 1 wherein the bottom end of the expansion sleeve compression nut is in a circular flange face configuration and the top end of the expansion sleeve compression nut is in an external hexagonal configuration.
5. The anti-loosening bolt and nut assembly according to claim 1, wherein the top end of the main bolt tension nut is provided with a counter bore, the inner bottom end of the main bolt tension nut is provided with a blind hole, and the inner wall of the main bolt tension nut is provided with an internal thread.
6. The anti-loosening bolt and nut assembly according to claim 1, wherein the connected pieces are provided with a plurality of groups, an inner hole is formed in the top of each connected piece, and the inner hole is matched with the circular expansion sleeve in size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010380281.3A CN111425512A (en) | 2020-05-08 | 2020-05-08 | Anti-loosening bolt and nut assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010380281.3A CN111425512A (en) | 2020-05-08 | 2020-05-08 | Anti-loosening bolt and nut assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111425512A true CN111425512A (en) | 2020-07-17 |
Family
ID=71550685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010380281.3A Pending CN111425512A (en) | 2020-05-08 | 2020-05-08 | Anti-loosening bolt and nut assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111425512A (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1269821A (en) * | 1968-05-10 | 1972-04-06 | Tuflex Ag | An improved fixing assembly for detachably securing an object to a rail of the assembly |
| FR2416374A1 (en) * | 1978-02-03 | 1979-08-31 | Fmc Corp | DEVICE FOR MOUNTING A TUBULAR ELEMENT ON A SHAFT |
| CN1846070A (en) * | 2003-07-01 | 2006-10-11 | 埃茨纳特私人有限公司 | Elastic joint element and fastener assembly incorporating the same |
| CN102705345A (en) * | 2012-06-13 | 2012-10-03 | 梁嘉麟 | Unremovable bolt-type rivet and riveting operation method thereof during on-site construction |
| CN103372777A (en) * | 2012-04-24 | 2013-10-30 | 安徽华菱汽车有限公司 | Auxiliary supporting device |
| CN103807275A (en) * | 2012-11-12 | 2014-05-21 | 利西太空公司 | Leak-proof fastening device and assembly method thereof |
| CN204387068U (en) * | 2014-06-24 | 2015-06-10 | 郑州宇通客车股份有限公司 | Anti-loosen screw nut component and use the threaded anti-loosing structure of this assembly |
| CN205678369U (en) * | 2016-06-06 | 2016-11-09 | 湖北宜都宜运机电工程有限公司 | A kind of combined type support bar |
| CN106438644A (en) * | 2016-11-04 | 2017-02-22 | 同济大学 | Eccentric torsional shear damage type self-fixing single-side bolt fastener |
| CN207364059U (en) * | 2017-10-30 | 2018-05-15 | 天津市京铁铁路机车车辆配件厂 | A kind of engine truck gear-box fixation backing-up screw |
| CN110552946A (en) * | 2019-09-27 | 2019-12-10 | 鲁东大学 | Locking stopping bolt assembly with single nut |
| CN110792678A (en) * | 2019-11-01 | 2020-02-14 | 朱永发 | Structure for preventing nut from loosening |
| CN210087795U (en) * | 2019-06-13 | 2020-02-18 | 淄博强大集团有限公司 | High-strength bolt |
| CN212455171U (en) * | 2020-05-08 | 2021-02-02 | 广西玉柴机器股份有限公司 | Anti-loosening bolt and nut assembly |
-
2020
- 2020-05-08 CN CN202010380281.3A patent/CN111425512A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1269821A (en) * | 1968-05-10 | 1972-04-06 | Tuflex Ag | An improved fixing assembly for detachably securing an object to a rail of the assembly |
| FR2416374A1 (en) * | 1978-02-03 | 1979-08-31 | Fmc Corp | DEVICE FOR MOUNTING A TUBULAR ELEMENT ON A SHAFT |
| CN1846070A (en) * | 2003-07-01 | 2006-10-11 | 埃茨纳特私人有限公司 | Elastic joint element and fastener assembly incorporating the same |
| CN103372777A (en) * | 2012-04-24 | 2013-10-30 | 安徽华菱汽车有限公司 | Auxiliary supporting device |
| CN102705345A (en) * | 2012-06-13 | 2012-10-03 | 梁嘉麟 | Unremovable bolt-type rivet and riveting operation method thereof during on-site construction |
| CN103807275A (en) * | 2012-11-12 | 2014-05-21 | 利西太空公司 | Leak-proof fastening device and assembly method thereof |
| CN204387068U (en) * | 2014-06-24 | 2015-06-10 | 郑州宇通客车股份有限公司 | Anti-loosen screw nut component and use the threaded anti-loosing structure of this assembly |
| CN205678369U (en) * | 2016-06-06 | 2016-11-09 | 湖北宜都宜运机电工程有限公司 | A kind of combined type support bar |
| CN106438644A (en) * | 2016-11-04 | 2017-02-22 | 同济大学 | Eccentric torsional shear damage type self-fixing single-side bolt fastener |
| CN207364059U (en) * | 2017-10-30 | 2018-05-15 | 天津市京铁铁路机车车辆配件厂 | A kind of engine truck gear-box fixation backing-up screw |
| CN210087795U (en) * | 2019-06-13 | 2020-02-18 | 淄博强大集团有限公司 | High-strength bolt |
| CN110552946A (en) * | 2019-09-27 | 2019-12-10 | 鲁东大学 | Locking stopping bolt assembly with single nut |
| CN110792678A (en) * | 2019-11-01 | 2020-02-14 | 朱永发 | Structure for preventing nut from loosening |
| CN212455171U (en) * | 2020-05-08 | 2021-02-02 | 广西玉柴机器股份有限公司 | Anti-loosening bolt and nut assembly |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200717 |
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| RJ01 | Rejection of invention patent application after publication |