CN112483568A - Fault detector for brake shoe of elevator driving host - Google Patents
Fault detector for brake shoe of elevator driving host Download PDFInfo
- Publication number
- CN112483568A CN112483568A CN202011428435.8A CN202011428435A CN112483568A CN 112483568 A CN112483568 A CN 112483568A CN 202011428435 A CN202011428435 A CN 202011428435A CN 112483568 A CN112483568 A CN 112483568A
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- Prior art keywords
- fault detector
- conductive contact
- brake
- arc
- contactor
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- 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.)
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- 230000015556 catabolic process Effects 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000009434 installation Methods 0.000 claims abstract description 6
- 230000000149 penetrating effect Effects 0.000 claims abstract 4
- 125000003003 spiro group Chemical group 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 238000011897 real-time detection Methods 0.000 abstract 1
- 238000005299 abrasion Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000005253 cladding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D66/02—Apparatus for indicating wear
- F16D66/021—Apparatus for indicating wear using electrical detection or indication means
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D66/02—Apparatus for indicating wear
- F16D66/021—Apparatus for indicating wear using electrical detection or indication means
- F16D66/022—Apparatus for indicating wear using electrical detection or indication means indicating that a lining is worn to minimum allowable thickness
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention belongs to the technical field of elevator detection equipment, and particularly relates to a fault detector for a brake shoe of an elevator driving host, which comprises a brake wheel fixed on an output shaft of the driving host, a band-type brake device arranged on the outer side of the brake wheel and a detection circuit, wherein two conductive contact columns easy to wear are arranged on one arc-shaped band-type brake arm, an insulating installation part is arranged between each conductive contact column and the arc-shaped band-type brake arm, the detection circuit comprises a main loop and a secondary loop, the main loop comprises an indicator lamp, a contactor KM and a main contact of the contactor KM which are connected in series in the circuit, the secondary loop comprises a sealing breakdown mechanism and two conductive contact columns which are connected in series, the secondary loop is connected with the main contact of the contactor KM in parallel, two spheres penetrating through a sealing shell are arranged in the sealing shell. The purpose is as follows: the problem of the unable in elevator normal use that leads to of current detection mode, carry out real-time detection to the condition of the brake shoe wearing and tearing of host computer excessive is solved.
Description
Technical Field
The invention belongs to the technical field of elevator detection equipment, and particularly relates to a fault detector for a brake shoe of an elevator driving host.
Background
The elevator plays more and more important roles in daily life and work of people, the elevator also has to meet the requirements of safety and reliability, high conveying efficiency, accurate leveling, comfortable riding and the like when in use, and meanwhile, the elevator also has to be provided with a safety protection device so as to be capable of emergently braking when the elevator breaks down, wherein a brake shoe (also called a contracting brake) of an elevator main machine is an important part for braking the elevator, the elevator can be safely stopped at the leveling position of a car door to ensure that passengers safely get in and out of an elevator car, and the brake shoe of the elevator main machine is mainly used for contracting a main machine traction wheel so as to prevent the traction wheel from rotating.
Research shows that when the service life of the conventional elevator is too long, the elevator can not be effectively stopped due to the abrasion of brake shoes of the main machine in the elevator stopping process or after the elevator stops, so that the elevator car can move accidentally when passengers get in and out of the elevator car, and serious potential safety hazards can be brought to the passengers.
At present, brake shoe abrasion of a main machine is judged by adopting a field ruler measurement method, and the condition of excessive brake shoe abrasion of the main machine cannot be detected in real time in the normal use process of an elevator.
Disclosure of Invention
The purpose of the invention is: the fault detector is used for solving the problem that the condition of brake shoe abrasion of the main machine is excessive in real time in the normal use process of the elevator due to the existing detection mode.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
the utility model provides an elevator drive host computer is fault detector for brake shoe, is including being fixed in the braked wheel on the drive host computer output shaft, installing in the band-type brake device and the detection circuitry in the braked wheel outside, be equipped with the insulating layer between braked wheel and the drive host computer output shaft, the band-type brake device includes the arc contracting brake arm of two mutual symmetries, arc contracting brake arm inner wall demountable installation has the brake shoe, the brake shoe is made by non-conductive rubber material, one of them install two conductive contact post that easily wear and tear on the arc contracting brake arm, install insulating installed part between conductive contact post and the arc contracting brake arm, one of them two blind holes have been seted up in the brake shoe outside, conductive contact post is close to braked wheel one end and wears to establish in the blind hole, detection circuitry includes main loop and vice return circuit, main loop includes the pilot lamp of establishing ties in the, The main contact of contactor KM and contactor KM, vice return circuit is including the sealed breakdown mechanism and two electrically conductive contact posts that are in series connection together, vice return circuit is parallelly connected with contactor KM's main contact, sealed breakdown mechanism includes sealed casing, install two spheroids that pass sealed casing in the sealed casing, two the spheroid passes through the wire and connects in vice return circuit, two have certain distance between the spheroid.
Further defined, the conductive contact posts are copper guide posts. By adopting the structure design, the copper guide pillar has lower resistance and lower hardness, is convenient to conduct, and can meet the requirement of easy abrasion of the conductive contact pillar.
Further defined, the blind hole is a stepped hole. Such structural design, when using, can stretch into the blind hole to insulating installed part near braked wheel one end in, avoid electrically conductive contact post and braked wheel contact and the electric leakage problem that causes.
Further inject, set up the through-hole that runs through arc contracting brake arm on the arc contracting brake arm, the annular groove with the through-hole coaxial line is seted up in the arc contracting brake arm outside, set up the internal thread with the spiro union of insulating installed part in the annular groove. Such structural design can be after installing the brake shoe on arc braking arm, and internal thread and the insulating installed part spiro union in the reuse annular groove are installed conductive contact post and insulating installed part, and it is more convenient to install.
Further inject, the insulating mounting spare is including being located the barrel and keeping away from the annular boss of braked wheel one side, electrically conductive contact post keeps away from braked wheel one end and has seted up the screw hole, threaded hole spiro union has fixing bolt, fixing bolt wears to establish in the annular boss, wire and fixing bolt fixed connection. Such structural design carries out the cladding to electrically conductive contact post through the barrel, avoids electrically conductive contact post and arc contracting brake arm contact, causes the risk of electric leakage, connects electrically conductive contact post and insulating installed part through fixing bolt simultaneously, simple structure, simple to operate.
Further, the insulating mounting piece is hexagonal and is far away from one end of the brake wheel. Such structural design, when installing insulating installed part on arc contracting brake arm, usable box spanner or hex wrench rotate insulating installed part, and convenient to use also can dodge fixing bolt simultaneously, avoids fixing bolt's existence to influence the installation of insulating installed part.
Further, the fixing bolt is sleeved with a conducting ring on the outer side of the annular boss, and the conducting ring is connected with the electric wire. The conductive contact column is communicated through the connection of the conductive ring and the electric wire, and the structure design is simple and convenient to install.
The invention adopting the technical scheme has the advantages that:
1. after the brake wheel is used for contacting the conductive contact column, the contact area between the conductive contact column and the brake wheel is gradually increased due to the abrasion of the conductive contact column, so that the potential difference between spheres in the sealed breakdown mechanism is increased, the air in the sealed breakdown mechanism is broken down, a circuit is formed, and the management is reminded in a mode that the indicator lamp continuously emits light, so that the aim of detecting the condition that the brake shoe of the host machine is excessively abraded in real time in the normal use process of the elevator is fulfilled;
2. through the use of the contactor, the indicator lamp continuously emits light after the sealed breakdown mechanism is broken down, and the indicator lamp is not extinguished because the conductive contact column is separated from the brake wheel, so that the problem of short service life caused by frequent opening and closing of the indicator lamp is avoided;
3. through the use of the sealing breakdown mechanism, the detector automatically forms a circuit only after the brake shoe is excessively worn, so that the power consumption of the detector in the use process is reduced, and the use of the electric quantity is saved.
Drawings
The invention is further illustrated by the non-limiting examples given in the accompanying drawings;
FIG. 1 is a schematic structural diagram of an embodiment of a fault detector for a brake shoe of an elevator driving host according to the present invention;
FIG. 2 is a schematic cross-sectional view of an embodiment of a fault detector for a brake shoe of an elevator driving main unit according to the present invention;
FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;
FIG. 4 is a detection circuit diagram of an embodiment of a fault detector for a brake shoe of an elevator driving host according to the present invention;
the main element symbols are as follows:
a brake wheel 1, an arc-shaped contracting brake arm 2, a brake shoe 3, a conductive contact column 4,
An insulating mounting member 5, a fixing bolt 50, an annular boss 51, a conductive ring 52,
The sealed breakdown mechanism 6, the main contact 62, the indicator light 63 and the contactor KM 64.
Detailed Description
The present invention will be described in detail with reference to the drawings and specific embodiments, wherein like reference numerals are used for similar or identical parts in the drawings or the description, and implementations not shown or described in the drawings are known to those of ordinary skill in the art. In addition, directional terms, such as "upper", "lower", "top", "bottom", "left", "right", "front", "rear", and the like, used in the embodiments are only directions referring to the drawings, and are not intended to limit the scope of the present invention.
As shown in figures 1-4, the fault detector for the brake shoe of the elevator driving host comprises a brake wheel 1 fixed on an output shaft of the driving host, a band-type brake device arranged on the outer side of the brake wheel 1 and a detection circuit, wherein an insulating layer is arranged between the brake wheel 1 and the output shaft of the driving host, the band-type brake device comprises two arc-shaped band-type brake arms 2 which are symmetrical to each other, brake shoes 3 are detachably arranged on the inner walls of the arc-shaped band-type brake arms 2, the brake shoes 3 are made of non-conductive rubber materials, two conductive contact columns 4 which are easy to wear are arranged on one of the arc-shaped band-type brake arms 2, an insulating mounting part 5 is arranged between the conductive contact columns 4 and the arc-shaped band-type brake arms 2, two blind holes are formed in the outer side of one of the brake shoes 3, one ends, close to the brake wheel 1, of the conductive contact columns 4 are, The main contact 62 of contactor KM64 and contactor KM, the secondary circuit is including the sealed breakdown mechanism 6 and two electrically conductive contact posts 4 that are in series connection together, and the secondary circuit is parallelly connected with the main contact 62 of contactor KM, and sealed breakdown mechanism 6 includes sealed housing, installs two spheroids that pass sealed housing in the sealed housing, and two spheroids pass through the wire and connect in the secondary circuit, have certain distance between two spheroids.
The conductive contact posts 4 are copper guide posts. The copper guide post has lower resistance and lower hardness, is convenient to conduct electricity and can meet the requirement that the conductive contact post 4 is easy to wear.
The blind hole is a stepped hole. When the brake wheel structure is used, one end, close to the brake wheel 1, of the insulating mounting part 5 can extend into the blind hole, and the problem of electric leakage caused by contact of the conductive contact column 4 and the brake wheel 1 is avoided.
Set up the through-hole that runs through arc contracting brake arm 2 on the arc contracting brake arm 2, set up the annular groove with the through-hole coaxial line in the arc contracting brake arm 2 outside, seted up the internal thread with 5 spiro unions of insulating installed part in the annular groove. Can install back on arc contracting brake arm 2 to brake shoe 3, recycle the internal thread in the annular groove and the 5 spiro union of insulating installed part, install electrically conductive contact post 4 and insulating installed part 5, it is more convenient to install.
Insulating installed part 5 is including being located the barrel and keeping away from annular boss 51 of braked wheel 1 one side, and electrically conductive contact post 4 keeps away from braked wheel 1 one end and has seted up the screw hole, and threaded hole spiro union has fixing bolt 50, and fixing bolt 50 wears to establish in annular boss 51, wire and fixing bolt 50 fixed connection. Carry out the cladding to electrically conductive contact post 4 through the barrel, avoid electrically conductive contact post 4 and the contact of arc contracting brake arm 2, cause the risk of electric leakage, connect simple structure, simple to operate simultaneously through fixing bolt 50 to electrically conductive contact post 4 and insulating installed part 5.
The insulating mounting piece 5 is away from one end of the brake wheel 1 and is in a hexagonal shape. When installing insulating installed part 5 on arc contracting brake arm 2, usable box spanner or hexagonal spanner rotate insulating installed part 5, and convenient to use also can dodge fixing bolt 50 simultaneously, avoids fixing bolt 50's existence to influence the installation of insulating installed part 5.
The fixing bolt 50 is sleeved with a conductive ring 52 outside the annular boss 51, and the conductive ring 52 is connected with the electric wire. The conductive contact post 4 is communicated through the connection of the conductive ring 52 and the wire, and the structure is simple and the installation is convenient.
In the embodiment, when the brake shoe is used, the thickness of the brake shoe 3 is continuously reduced along with the abrasion of the brake shoe 3 until the conductive contact column 4 is contacted with the brake wheel 1, at the moment, the conductive contact column 4 and the brake wheel 1 form a passage, but due to the existence of the sealed breakdown mechanism 6, when the contact area between the conductive contact column 4 and the brake wheel 1 is insufficient, the potential difference between two spheres in the sealed breakdown mechanism 6 is insufficient, the air between the two spheres in the sealed breakdown mechanism 6 is not punctured, at the moment, the contactor KM64 does not act, the main loop does not form a passage, the indicator light 63 does not emit light, and the whole passage does not consume electric quantity;
continue to use, braked wheel 1 wears out electrically conductive contact post 4, until electrically conductive contact post 4 is worn out to laminating braked wheel 1 by the terminal surface of braked wheel 1 one side of being close to, and when area of contact is greater than certain limit, the electric potential difference reaches certain limit between two spheroids in the sealed breakdown mechanism 6, puncture the air between two spheroids in the sealed breakdown mechanism 6, make vice return circuit form and let in, contactor KM64 gets electric, it is closed to drive contactor KM's main contact 62, main return circuit forms the route, pilot lamp 63 is luminous, remind managers 3 wearing and tearing have worn out excessively.
The fault detector for the brake shoe of the elevator driving host provided by the invention is described in detail above. The description of the specific embodiments is only intended to facilitate an understanding of the method of the invention and its core ideas. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. The utility model provides an elevator drive host computer fault detector for brake shoe, is including being fixed in on the drive host computer output shaft braked wheel (1), installing in the band-type brake device and the detection circuitry in the braked wheel (1) outside, be equipped with the insulating layer between braked wheel (1) and the drive host computer output shaft, the band-type brake device includes arc contracting brake arm (2) of two mutual symmetries, arc contracting brake arm (2) inner wall demountable installation has brake shoe (3), brake shoe (3) are made its characterized in that by the rubber material that does not electrically conduct: one of the arc-shaped contracting brake arm (2) is provided with two conductive contact columns (4) which are easy to wear, an insulating mounting part (5) is arranged between the conductive contact columns (4) and the arc-shaped contracting brake arm (2), two blind holes are formed in the outer side of the brake shoe (3), one end, close to the brake wheel (1), of each conductive contact column (4) is arranged in each blind hole in a penetrating mode, the detection circuit comprises a main loop and a secondary loop, the main loop comprises an indicator lamp (63), a contactor KM (64) and a main contact (62) of the contactor KM which are connected in series in the circuit, the secondary loop comprises a sealing breakdown mechanism (6) and two conductive contact columns (4) which are connected in series, the secondary loop is connected in parallel with the main contact (62) of the contactor KM, the sealing breakdown mechanism (6) comprises a sealing shell, and two spheres penetrating through the sealing shell are arranged in the sealing shell, the two spheres are connected in the secondary loop through a lead, and a certain distance is reserved between the two spheres.
2. The fault detector of claim 1, wherein the fault detector comprises: the conductive contact column (4) is a copper guide column.
3. The fault detector of claim 1, wherein the fault detector comprises: the blind holes are stepped holes.
4. The fault detector of claim 3, wherein the fault detector comprises: the arc contracting brake arm (2) is provided with a through hole penetrating through the arc contracting brake arm (2), the outer side of the arc contracting brake arm (2) is provided with an annular groove coaxial with the through hole, and an internal thread connected with the insulating mounting part (5) in a threaded mode is arranged in the annular groove.
5. The fault detector of claim 4, wherein the fault detector comprises: insulating installed part (5) are including being located the barrel and keeping away from annular boss (51) of braked wheel (1) one side, the electrically conductive contact post (4) is kept away from braked wheel (1) one end and is seted up threaded hole, threaded hole spiro union has fixing bolt (50), fixing bolt (50) are worn to establish in annular boss (51), wire and fixing bolt (50) fixed connection.
6. The fault detector of claim 5, wherein the fault detector comprises: the insulating mounting piece (5) is away from one end of the brake wheel (1) and is in a hexagonal shape.
7. The fault detector of claim 6, wherein the fault detector comprises: the fixing bolt (50) is sleeved with a conductive ring (52) on the outer side of the annular boss (51), and the conductive ring (52) is connected with an electric wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011428435.8A CN112483568A (en) | 2020-12-09 | 2020-12-09 | Fault detector for brake shoe of elevator driving host |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011428435.8A CN112483568A (en) | 2020-12-09 | 2020-12-09 | Fault detector for brake shoe of elevator driving host |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112483568A true CN112483568A (en) | 2021-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011428435.8A Pending CN112483568A (en) | 2020-12-09 | 2020-12-09 | Fault detector for brake shoe of elevator driving host |
Country Status (1)
| Country | Link |
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| CN (1) | CN112483568A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294359A (en) * | 2021-12-14 | 2022-04-08 | 上海爱登堡电梯集团股份有限公司 | Escalator with built-in probe structure brake lining failure monitoring device |
| CN115420185A (en) * | 2022-11-04 | 2022-12-02 | 北京建筑大学 | Vehicle brake shoe residual thickness detection system |
| CN116215683A (en) * | 2023-03-22 | 2023-06-06 | 河北中拟科技有限公司 | Battlefield inducer capable of being repaired for many times |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1591735A (en) * | 1976-09-30 | 1981-06-24 | Abex Pagid Equip | Disc brakes |
| DE4005407A1 (en) * | 1989-03-04 | 1990-09-06 | Volkswagen Ag | Speed controller for vehicle engine - has servo operated brake shoe on flywheel to retard engine under set conditions |
| EP0502282A1 (en) * | 1991-03-07 | 1992-09-09 | Otis Elevator Company | Procedure and device for the control of appropiate operation of a block brake |
| WO2006021136A1 (en) * | 2004-08-24 | 2006-03-02 | Jinlin Chen | Detecting device and detecting method for an elevator |
| CN205500491U (en) * | 2016-04-13 | 2016-08-24 | 新疆维吾尔自治区特种设备检验研究院 | Elevator braking band -type brake |
| CN107654545A (en) * | 2017-10-09 | 2018-02-02 | 快意电梯股份有限公司 | Elevator main brake block abrasion detection means and detection method |
| CN108529477A (en) * | 2018-05-30 | 2018-09-14 | 宁波欣达电梯配件厂 | Brake brake block abrasion detection structure and its installation method, control method |
| CN208361783U (en) * | 2018-05-30 | 2019-01-11 | 宁波欣达电梯配件厂 | Brake brake block abrasion detection structure |
-
2020
- 2020-12-09 CN CN202011428435.8A patent/CN112483568A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1591735A (en) * | 1976-09-30 | 1981-06-24 | Abex Pagid Equip | Disc brakes |
| DE4005407A1 (en) * | 1989-03-04 | 1990-09-06 | Volkswagen Ag | Speed controller for vehicle engine - has servo operated brake shoe on flywheel to retard engine under set conditions |
| EP0502282A1 (en) * | 1991-03-07 | 1992-09-09 | Otis Elevator Company | Procedure and device for the control of appropiate operation of a block brake |
| WO2006021136A1 (en) * | 2004-08-24 | 2006-03-02 | Jinlin Chen | Detecting device and detecting method for an elevator |
| CN205500491U (en) * | 2016-04-13 | 2016-08-24 | 新疆维吾尔自治区特种设备检验研究院 | Elevator braking band -type brake |
| CN107654545A (en) * | 2017-10-09 | 2018-02-02 | 快意电梯股份有限公司 | Elevator main brake block abrasion detection means and detection method |
| CN108529477A (en) * | 2018-05-30 | 2018-09-14 | 宁波欣达电梯配件厂 | Brake brake block abrasion detection structure and its installation method, control method |
| CN208361783U (en) * | 2018-05-30 | 2019-01-11 | 宁波欣达电梯配件厂 | Brake brake block abrasion detection structure |
Non-Patent Citations (2)
| Title |
|---|
| 武占成等: "《气体放电》", 31 January 2012 * |
| 郭凤仪等: "《矿山智能电器》", 30 June 2018 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114294359A (en) * | 2021-12-14 | 2022-04-08 | 上海爱登堡电梯集团股份有限公司 | Escalator with built-in probe structure brake lining failure monitoring device |
| CN115420185A (en) * | 2022-11-04 | 2022-12-02 | 北京建筑大学 | Vehicle brake shoe residual thickness detection system |
| CN116215683A (en) * | 2023-03-22 | 2023-06-06 | 河北中拟科技有限公司 | Battlefield inducer capable of being repaired for many times |
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Application publication date: 20210312 |