CN207909740U - A kind of three station slow speed operation mechanism of speed reducer formula - Google Patents

A kind of three station slow speed operation mechanism of speed reducer formula Download PDF

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Publication number
CN207909740U
CN207909740U CN201721720532.8U CN201721720532U CN207909740U CN 207909740 U CN207909740 U CN 207909740U CN 201721720532 U CN201721720532 U CN 201721720532U CN 207909740 U CN207909740 U CN 207909740U
Authority
CN
China
Prior art keywords
switch
speed reducer
rotating shaft
gear
travel switch
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.)
Withdrawn - After Issue
Application number
CN201721720532.8U
Other languages
Chinese (zh)
Inventor
吴克彦
王式磊
侯志林
曹西良
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANDONG TAISHAN HIGH VOLTAGE SWITCH CO Ltd
Original Assignee
SHANDONG TAISHAN HIGH VOLTAGE SWITCH CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to CN201720498209 priority Critical
Priority to CN2017204982094 priority
Application filed by SHANDONG TAISHAN HIGH VOLTAGE SWITCH CO Ltd filed Critical SHANDONG TAISHAN HIGH VOLTAGE SWITCH CO Ltd
Application granted granted Critical
Publication of CN207909740U publication Critical patent/CN207909740U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20Interlocking, locking, or latching mechanisms
    • H01H9/26Interlocking, locking, or latching mechanisms for interlocking two or more switches
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/22Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/26Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00Mechanisms for operating contacts
    • H01H3/22Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/26Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
    • H01H2003/266Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor having control circuits for motor operating switches, e.g. controlling the opening or closing speed of the contacts

Abstract

The utility model discloses a kind of three station slow speed operation mechanisms of speed reducer formula, including bottom plate, first speed reducer is installed on the bottom plate and drives the power plant of first speed reducer, the speed reducer is equipped with first rotating shaft, the first rotating shaft is driven by the power plant, the first rotating shaft upper end is fixedly connected with cam, the both sides of the cam are respectively set there are four travel switch, the angle of travel switch control cam rotation, the first rotating shaft lower end also with the switch axis connection of the first high-voltage switch gear.The three station slow speed operation mechanism structure of speed reducer formula of the utility model is simple, apparent size is small, light-weight, output is stablized, while security performance is high.

Description

A kind of three station slow speed operation mechanism of speed reducer formula
Technical field
The utility model is related to power equipment operating mechanism technical field more particularly to a kind of three stations of speed reducer formula at a slow speed Operating mechanism.
Background technology
There are following disadvantage in three common station slow speed operation mechanisms:1. three common station slow speed operation mechanism movements Support is easily deformed for welding post-processing, processes axis hole and the bad control of when wire hole position, will appear after the completion of assembly gear it Between or worm and gear fit clearance it is excessive or too small, longtime running is excessive with occlusal wear, reduces the service life that there are serious safeties Hidden danger.2. three common all operating members of station slow speed operation mechanism are mechanical processing, the big cost of labor of processing capacity compared with It is high.3. three common station slow speed operation mechanism structure complex parts are more, manufacturing cost is high, difficult to install big.
Invention content
It is the technical issues of in the presence of the utility model mainly solution prior art, a kind of compact-sized to provide, Apparent size is small, light-weight, and output is stablized, the lower three station slow speed operation mechanism of speed reducer formula of overall cost.
The above-mentioned technical problem of the utility model is mainly to be addressed by following technical proposals:
A kind of three station slow speed operation mechanism of speed reducer formula, including bottom plate, be equipped on the bottom plate the first speed reducer and The power plant of first speed reducer, first speed reducer is driven to be equipped with first rotating shaft, the first rotating shaft passes through institute Power plant driving is stated, the first rotating shaft upper end is fixedly connected with cam, and the convex side of the cam is disposed with first Travel switch, the second travel switch, third trip switch, fourth line journey switch, first to fourth travel switch pass through control Device processed is connect with power plant, and first to fourth travel switch is mounted on travel switch mounting plate, and the stroke is opened Close mounting plate be mounted on the first speed reducer on, the first rotating shaft lower end also with the switch axis connection of the first high-voltage switch gear.
Further, the cam can be moved to ground connection control position, isolation control position and the combined floodgate set gradually Control position;When the cam is in ground connection control position, the first travel switch, the second travel switch are closed, and third trip is opened It closes, fourth line journey switch is opened;When the cam is in isolation control position, the second travel switch, third trip switch are closed, First travel switch, fourth line journey switch are opened;When the cam is in shutting-brake control position, the first travel switch, the second row Cheng Kaiguan is opened, and third trip switch, fourth line journey switch are closed.
Further, it is also installed with the first limiting plate in the first rotating shaft, is also equipped on the speed reducer Two limiting plates are provided with the first stop surface and the second stop surface on second limiting plate, and first limiting plate is along described One shaft rotate when, can backstop on first stop surface or the second stop surface.
Further, the power plant is driving motor, and the control device comprises the following modules:
Human-computer interaction module, staff input aiming station by human-computer interaction module;
Whether position computation module, for identification first rotating shaft current station and aiming station calculate motor and start and electricity The steering of machine, judge and control ground connection control module, isolation control module or switch-on controlling module be connected to motor stopping modular;
Electric motor starting module, for sending enabling signal and turn signal to power drive module;
Motor drive module, receives enabling signal and turn signal that electric motor starting module is sent, and control motor rotates forward Or reversion, the stopping signal of motor stopping modular is received, control motor is closed;
It is grounded control module, for detecting whether third trip switch is opened;
Control module is isolated, for detecting the first travel switch, whether fourth line journey switch is opened;
Switch-on controlling module, for detecting whether the second travel switch is opened;
Motor stopping modular calculates ground connection control module, isolation control module or switch-on controlling module according to aiming station Then the position arriving signal sent sends stopping signal to motor drive module;
The human-computer interaction module, position computation module, electric motor starting module, motor drive module are sequentially connected electrically, institute It states position computation module also to connect with motor drive module by ground connection control module, motor stopping modular, the position calculates Module is also electrically connected by the way that control module is isolated with motor stopping modular, and the position computation module also passes through switch-on controlling module It is electrically connected with motor stopping modular;
The ground connection control module and third trip switch be electrically connecteds, the isolation control module and the first travel switch, Second travel switch is electrically connected, and the switch-on controlling module is electrically connected with fourth line journey switch, and the power plant is driven with motor Dynamic model block is electrically connected.
Further, it is also installed with third gear in the first rotating shaft, and is also equipped with auxiliary on the bottom plate Switch, the auxiliary switch are equipped with the second shaft, sector gear, the sector gear are installed in second shaft It is engaged with third gear.
Further, there are three the auxiliary switch quantity, the second shaft on three auxiliary switches passes through the same company Bar is hinged.
Further, the power plant includes the driving motor being mounted on the bottom plate, is pacified on the driving motor Equipped with first gear, second gear is installed on the input shaft of the speed reducer, the first gear is engaged with second gear.
Further, be also equipped with contactor and terminal block on the bottom plate, the contactor and terminal block with control Device connects.
Further, the first rotating shaft lower end is six square structures.
Compared with prior art, the utility model has the advantage of:By installing power plant on bottom plate, filled by power The first speed reducer of driving is set, cam is installed in the first rotating shaft of the first speed reducer, and four strokes are installed in cam both sides Switch, while the switch axis connection of first rotating shaft lower end and the first high-voltage switch gear, original state are isolation and are grounded all in dividing Lock state, when control device control power plant driving first rotating shaft rotates counterclockwise, first rotating shaft drives the first high-voltage switch gear Isolation is closed a floodgate, while the second travel switch flicks, and high-voltage switch gear sends a signal to control device, and control device controls power dress Set stopping;When power plant driving first rotating shaft rotates clockwise, first rotating shaft drives the first high-voltage switch gear that separating brake is isolated, simultaneously 4th right travel switch flicks, and power plant stops;When power plant continues that first rotating shaft is driven to rotate clockwise, first rotating shaft The first high-voltage switch gear contact of earth is driven, while third trip switch flicks, power plant stops;Power plant continues driving When one shaft rotates counterclockwise, first rotating shaft drives the first high-voltage switch gear to be grounded separating brake, while the first travel switch flicks, power Device stops, and mechanism returns to original state.
Three station slow speed operation mechanism structure of speed reducer formula is simple, apparent size is small for this, light-weight, output is stablized, simultaneously Security performance is high.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the vertical view of the three station slow speed operation mechanism of speed reducer formula of the utility model;
Fig. 2 is the front view of the three station slow speed operation mechanism of speed reducer formula of the utility model;
Fig. 3 is the control principle block diagram of the three station slow speed operation mechanism of speed reducer formula of the utility model.
Reference sign:1, bottom plate, the 2, second shaft, 3, auxiliary switch, 4, sector gear, 5, speed reducer, 6, contact Device, 7, terminal block, 8, travel switch mounting plate, the 91, first travel switch, the 92, second travel switch, 93, third trip switch, 94, fourth line journey switchs, and 10, cam, 11, second gear, 12, first gear, 13, power plant, 14, first rotating shaft, 15, the Two limiting plates, the 16, first limiting plate, 17, third gear, 18, driving motor, 19, connecting rod, 50, high-voltage switch gear ontology.
Specific implementation mode
The preferred embodiment of the utility model is described in detail below in conjunction with the accompanying drawings, so that the advantages of the utility model It can be easier to be readily appreciated by one skilled in the art with feature, it is apparent clear to be made to the scope of protection of the utility model Define.
Refering to fig. 1, shown in Fig. 2, a kind of three station slow speed operation mechanism of speed reducer formula provided by the utility model, bottom plate 1 On the power plant 13 of the first speed reducer 5 of the first speed reducer 5 and driving is installed, the first speed reducer 5 is equipped with first rotating shaft 14, First rotating shaft 14 is driven by power plant 13, and 14 upper end of first rotating shaft is fixedly connected with cam 10, and 10 both sides of cam are set respectively It is equipped with the first travel switch 91, the second travel switch 92, third trip switch 93 and fourth line journey switch 94, described first to Four travel switches(91-94)On travel switch mounting plate 8, and first to fourth travel switch(91-94)Pass through control Device 20 is connect with power plant 13, and the travel switch mounting plate 8 is under 5 top of the first speed reducer, first rotating shaft 14 Hold the switch axis connection also with the first high-voltage switch gear 50.If original state is isolation and is grounded all in gate-dividing state, power dress When setting 13 14 rotation counterclockwise of driving first rotating shafts, first rotating shaft 14 drives the isolation of the first high-voltage switch gear 50 to close a floodgate, while second Travel switch 92 flicks, and power plant 13 stops;When power plant 13 drives first rotating shaft 14 to rotate clockwise, first rotating shaft 14 Drive the first high-voltage switch gear 50 that separating brake is isolated, while fourth line journey switch 94 flicks, power plant 13 stops;Power plant 13 after When continuous driving first rotating shaft 14 rotates clockwise, first rotating shaft 14 drives 50 contact of earth of the first high-voltage switch gear, while the third line Cheng Kaiguan 93 is flicked, and power plant 13 stops;When power plant 13 continues that first rotating shaft 14 is driven to rotate counterclockwise, first rotating shaft 14 drive the first high-voltage switch gear 50 to be grounded separating brake, while the first travel switch 91 flicks, and power plant 13 stops, and mechanism returns to just Beginning state.The speed reducer structure is simple, apparent size is small, light-weight, output is stablized, while security performance is high.
In the present embodiment, it is also installed with the first limiting plate 16 in first rotating shaft 14, is also equipped on speed reducer 5 Two limiting plates 15 are provided with the first stop surface 151 and the second stop surface 152 on second limiting plate 15, and the first limiting plate 16 is along One shaft 14 rotate when, can backstop on the first stop surface 151 or the second stop surface 152.Pass through the first limiting plate 16 and Two limiting plates 15, can be to 14 rotary stopper of first rotating shaft, and the first stop surface 151 or the second stop surface 152 are respectively to first turn The left-handed limit of axis 14 and dextrorotation limit, it is excessive and destroy in GIS high-voltage switch gears to effectively prevent 14 rotation angle of first rotating shaft Body part.
Preferably, it is also installed with third gear 17 in first rotating shaft 14, and is also equipped with three auxiliary on bottom plate 1 and opens 3 are closed, auxiliary switch 3 is equipped with the second shaft 2, and 2 upper end of the second shaft is connected with sector gear 4, sector gear 4 and third gear Engagement, auxiliary switch division is controlled by the second shaft 2.It is also equipped with connecting rod 19 in second shaft 14, ensures three auxiliary The division simultaneously of switch 3.After auxiliary switch rotation is turned to another direction, normally closed point becomes opened point, and opened point becomes normally closed point, realizes One logical and obstructed variation.The third gear 17 can also drive the auxiliary switch 3 of other quantity.
Specifically, power plant 13 includes the driving motor 18 being mounted on bottom plate 1, pacify on the output shaft of driving motor 18 Equipped with first gear 12, second gear 11 is installed on the input shaft of speed reducer 7, first gear 12 is engaged with second gear 11. Output shaft rotation is driven by driving motor 18, by driving speed reducer after first gear 12 and 11 passing power of second gear First rotating shaft 14 rotates.Contactor 6 and terminal block 7,6 composition control device of contactor control driving electricity are also equipped on bottom plate 1 18 positive and negative rotation of machine, terminal block 7 is used to draw auxiliary switch contact and power supply wiring.Optimal, 14 lower end of first rotating shaft is six Square structure, the convenient switch axis connection with the first high-voltage switch gear 50.
Embodiment two
The difference between this embodiment and the first embodiment lies in the cam 10 can be moved to the ground connection control bit set gradually It sets, control position and shutting-brake control position is isolated;When the cam 10 is in ground connection control position, the first travel switch 91, the Two travel switches are closed 92, and third trip switch 93, fourth line journey switch 94 are opened;The cam 10 is in isolation control position When, the second travel switch 92, third trip switch 93 are closed, and the first travel switch 91, fourth line journey switch 94 are opened;It is described convex When wheel 10 is in shutting-brake control position, the first travel switch 91, the second travel switch 92 are opened, third trip switch the 93, the 4th Travel switch 94 is closed.Closure signal, closure signal can certainly be replaced to replace open signal with travel switch open signal Nor affect on the implementation of the present embodiment.
Power plant 13 is driving motor 18, as shown in fig.3, control device 20 comprises the following modules:
Human-computer interaction module 21, staff inputs aiming station by human-computer interaction module;
Position computation module 22, first rotating shaft current station and aiming station for identification, calculate motor whether start and The steering of motor judges and controls ground connection control module 25, isolation control module 26 or switch-on controlling module 27 and motor stopping Module 28 is connected to.For example, when needing to rotate to closing position, position computation module 22 stops switch-on controlling module 27 and motor Module 28 is connected, and ground connection control module 25, isolation control module 26 are not connected to motor stopping modular 28, so only closing a floodgate When control module 27 detects closing position, just signal is sent to motor stopping modular 28.
Preferably, position computation module 22 can also control ground connection control module 25, isolation control module 26 or control of closing a floodgate Whether molding block 27 works only is detected a kind of state to control.
Electric motor starting module 23, for sending enabling signal and turn signal to power drive module;
Motor drive module 24 receives enabling signal and turn signal that electric motor starting module is sent, and control motor is just Turn or reversion, the stopping signal of reception motor stopping modular, control motor are closed;
It is grounded control module 25, for detecting whether third trip switch 93 is opened;This module is used to detect cam 10 No rotation to ground connection controls position;
Control module 26 is isolated, for detecting the first travel switch 91, whether fourth line journey switch 94 is opened;This module is used Position is controlled in whether detection cam 10 rotates to isolation;
Switch-on controlling module 27, for detecting whether the second travel switch 92 is opened;This module is used to detect cam 10 It is no to rotate to shutting-brake control position.
Certainly, the position of cam 10 can also be switched by the first travel switch of whole detection to fourth line journey(91-94) Open/close states judge.
Motor stopping modular 28 calculates ground connection control module 25, isolation control module 26 or closes a floodgate and controls according to aiming station Then the position arriving signal that molding block 27 is sent sends stopping signal to motor drive module 24;
Human-computer interaction module 21, position computation module 22, electric motor starting module 23, motor drive module 24 are electrically connected successively It connects, position computation module 22 is also connect by ground connection control module 25, motor stopping modular 28 with motor drive module 24, position Computing module 22 is also electrically connected by the way that control module 26 is isolated with motor stopping modular 28, and position computation module 22 also passes through combined floodgate Control module 27 is electrically connected with motor stopping modular 28.
Ground connection control module 25 be electrically connected with third trip switch 93, isolation control module 26 and the first travel switch 91, Two or four travel switch 94 is electrically connected, and switch-on controlling module 27 is electrically connected with the second travel switch 92, power plant 13 and motor Drive module 24 is electrically connected.
When in use, user inputs aiming station by human-computer interaction module 21, in the present embodiment exemplary target work Position is isolation station, after position computation module 22 receives signal, identifies 10 current station of cam;Cam 10 currently if it is Earthing position, then position computation module 22 judge motor need start and need driving cam 10 counterclockwise rotate;Cam 10 is worked as It is preceding if it is closing position, then position computation module 22 judges that motor needs to start and driving cam 10 is needed to rotate clockwise; Cam 10 is currently if it is isolated location, then position just judges motor without starting by module 22.
After electric motor starting module 23 receives enabling signal and turn signal, motor drive module 24 is sent a signal to, electricity Machine drive module 24 is rotated according to enabling signal and turn signal driving motor.Meanwhile the detection the in real time of control module 26 is isolated Whether one stroke switch 91 and fourth line journey switch 94 are in the open state, stop to motor if so, sending position arriving signal Only module 28, motor stopping modular 28 send stopping signal to motor drive module 24, and 24 driving motor of motor drive module stops Only.
The three position mechanism of the utility model is compact-sized, and apparent size is small, light-weight, and output is stablized, and overall cost is more It is low, it can realize automation control.
More than, only specific embodiment of the present utility model, but protection scope of the utility model is not limited thereto, Any change or replacement expected without creative work, should be covered within the scope of the utility model.Therefore, The scope of protection of the utility model should be determined by the scope of protection defined in the claims.

Claims (7)

1. a kind of three station slow speed operation mechanism of speed reducer formula, including bottom plate, it is characterised in that:It is equipped with first on the bottom plate Speed reducer and the power plant for driving first speed reducer, first speed reducer are equipped with first rotating shaft, described first turn Axis is driven by the power plant, and the first rotating shaft upper end is fixedly connected with cam, and the convex side of the cam is set successively It is equipped with the first travel switch, the second travel switch, third trip switch, fourth line journey switch, first to fourth stroke is opened Pass is connect by control device with power plant, and first to fourth travel switch is mounted on travel switch mounting plate, institute Travel switch mounting plate is stated on the first speed reducer, the first rotating shaft lower end also connects with the switch shaft of the first high-voltage switch gear It connects, the cam can be moved to ground connection control position, isolation control position and the shutting-brake control position set gradually;It is described convex When wheel is in ground connection control position, the first travel switch, the second travel switch are closed, third trip switch, fourth line journey switch It opens;When the cam is in isolation control position, the second travel switch, third trip switch are closed, the first travel switch, the Four travel switches are opened;When the cam is in shutting-brake control position, the first travel switch, the second travel switch are opened, third Travel switch, fourth line journey switch are closed.
2. three station slow speed operation mechanism of speed reducer formula according to claim 1, it is characterised in that:In the first rotating shaft It is also installed with the first limiting plate, the second limiting plate is also equipped on the speed reducer, is provided on second limiting plate First stop surface and the second stop surface, when first limiting plate is rotated along the first rotating shaft, can backstop described first On stop surface or the second stop surface.
3. three station slow speed operation mechanism of speed reducer formula according to claim 2, it is characterised in that:In the first rotating shaft It is also installed with third gear, and is also equipped with auxiliary switch on the bottom plate, the auxiliary switch is equipped with the second shaft, Sector gear is installed in second shaft, the sector gear is engaged with third gear.
4. three station slow speed operation mechanism of speed reducer formula according to claim 3, it is characterised in that:The auxiliary switch number There are three amounts, and the second shaft on three auxiliary switches is hinged by the same connecting rod.
5. three station slow speed operation mechanism of speed reducer formula according to claim 4, it is characterised in that:The power plant packet The driving motor on the bottom plate is included, first gear, the input shaft of the speed reducer are installed on the driving motor On second gear is installed, the first gear is engaged with second gear.
6. three station slow speed operation mechanism of speed reducer formula according to claim 5, it is characterised in that:Also pacify on the bottom plate Equipped with contactor and terminal block, the contactor and terminal block are connect with control device.
7. three station slow speed operation mechanism of speed reducer formula according to claim 6, it is characterised in that:Under the first rotating shaft End is six square structures.
CN201721720532.8U 2017-05-08 2017-12-12 A kind of three station slow speed operation mechanism of speed reducer formula Withdrawn - After Issue CN207909740U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201720498209 2017-05-08
CN2017204982094 2017-05-08

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Publication Number Publication Date
CN207909740U true CN207909740U (en) 2018-09-25

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CN201711315895.8A Active CN107887204B (en) 2017-05-08 2017-12-12 Speed reducer type three-station slow-speed operating mechanism
CN201721720532.8U Withdrawn - After Issue CN207909740U (en) 2017-05-08 2017-12-12 A kind of three station slow speed operation mechanism of speed reducer formula

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Application Number Title Priority Date Filing Date
CN201711315895.8A Active CN107887204B (en) 2017-05-08 2017-12-12 Speed reducer type three-station slow-speed operating mechanism

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107887204A (en) * 2017-05-08 2018-04-06 泰安泰山高压开关有限公司 A kind of station slow speed operation mechanism of reductor formula three

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3710374C2 (en) * 1987-03-28 1990-07-26 Bbc Brown Boveri Ag, Baden, Aargau, Ch
CN100466126C (en) * 2005-07-11 2009-03-04 河南平高电气股份有限公司 Multi-station electric operation mechanism
CN102543551B (en) * 2011-12-26 2014-07-16 沈阳华德海泰电器有限公司 Operating mechanism of three-station switch
CN107887204B (en) * 2017-05-08 2019-12-06 泰安泰山高压开关有限公司 Speed reducer type three-station slow-speed operating mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107887204A (en) * 2017-05-08 2018-04-06 泰安泰山高压开关有限公司 A kind of station slow speed operation mechanism of reductor formula three

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CN107887204B (en) 2019-12-06

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Granted publication date: 20180925

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