CN110329288A - Railcar - Google Patents
Railcar Download PDFInfo
- Publication number
- CN110329288A CN110329288A CN201910706139.0A CN201910706139A CN110329288A CN 110329288 A CN110329288 A CN 110329288A CN 201910706139 A CN201910706139 A CN 201910706139A CN 110329288 A CN110329288 A CN 110329288A
- Authority
- CN
- China
- Prior art keywords
- flexible shell
- railcar
- compartment
- tailstock
- headstock
- 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
- 230000033001 locomotion Effects 0.000 claims description 19
- 230000007246 mechanism Effects 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D17/00—Construction details of vehicle bodies
- B61D17/02—Construction details of vehicle bodies reducing air resistance by modifying contour ; Constructional features for fast vehicles sustaining sudden variations of atmospheric pressure, e.g. when crossing in tunnels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Abstract
The present invention discloses a kind of railcar, including compartment, and the compartment includes headstock and the tailstock, and a flexible shell with airbag structure is covered on the headstock and/or the tailstock；When the flexible shell is in unfolded state, the whole streamlined structure of railcar；Since railcar of the present invention is covered with the flexible shell with airbag structure on the tailstock in compartment, to have streamlined structure when driving when any railcar is independent, windage is smaller, when more railcar head and the tail connect into a train, seamless interfacing can be achieved, the windage for reducing train, achievees the effect that reduce the energy consumption of railcar than individually travelling smaller windage；In addition, under the buffer function of the flexible shell of unfolded state, effective reducing impact force achievees the purpose that protect compartment and passenger when railcar collides.
Description
Technical field
The present invention relates to technical field of rail traffic more particularly to a kind of railcars with airbag structure.
Background technique
Overhead rail train (referred to as empty rail) is suspension type monorail traffic system.Track is square ON TRAINS, by steel or water
Mud upright supports are in the sky.Since empty rail traffic system moves to traffic above-ground in the air, set without extending city existing highway
It can be relieved urban transportation problem on the basis of applying；Again since it only moves to track in the air, rather than as elevated railway or ride seat
Formula single track like that lifts on entire road surface into aerial, therefore overcomes the disadvantage of other Rail Transit Systems, in construction and operator
Face has many features and advantages outstanding.
It is all at present using traditional carriage body construction, this railcar using the railcar in Rail Transit System in the sky
When running at high speed, not only air resistance coefficient is big, and in the process of moving in case of collide, generate hard collision power without
Damage can be all brought to car body or to the passenger in car body by being, so, the security performance of this railcar is relatively low, uncomfortable
Conjunction is run at high speed.
Summary of the invention
Railcar that is low, supporting high speed walking that the object of the present invention is to provide a kind of air resistance coefficients.
To achieve the goals above, the present invention discloses a kind of railcar, including compartment, and the compartment includes headstock and vehicle
Tail covers a flexible shell with airbag structure on the headstock and/or the tailstock；When the flexible shell is in unfolded state
When, the railcar is integrally in the streamlined structure gradually tapered up to headstock and the tailstock.
Compared with prior art, railcar of the present invention is covered on the headstock and/or the tailstock in compartment with airbag structure
Flexible shell, so that air can be filled with into flexible shell in the process of moving when railcar so that flexible shell is unfolded, and
There is streamlined structure when driving when any railcar is independent, windage is smaller, links together when by more railcar head and the tail
When forming train, the air in flexible shell can be released, be at soft contraction state, to realize railcar
Seamless connection, this just reduces the windage of the train connected on the whole, so that windage is smaller than individually traveling；In addition, rail
Road vehicle in case of collide, under the buffer function of the flexible shell of unfolded state, can effective reducing impact force, reach protection vehicle
The purpose in compartment and passenger；Furthermore since when the flexible shell is in unfolded state, railcar is in headstock and vehicle on the whole
The streamlined structure that tail gradually tapers up to effectively reduce the air resistance coefficient of compartment entirety, and then reduces railcar high speed and advances
In resistance, reduce railcar energy consumption and noise.
Preferably, the flexible shell has an opening portion, the flexible shell passes through the opening portion and the compartment
Connection forms one first closure cavity between the flexible shell and the compartment.
Preferably, being provided with the first air inlet on the side wall of the junction or flexible shell in the flexible shell and the compartment
Channel, air-flow can enter the first closure cavity by first inlet channel.
Preferably, the flexible shell is a closing structure body, in have and formed by the inner wall of the flexible shell
Second closure cavity.
Preferably, being provided with the second inlet channel being connected to the second closure cavity, air-flow on the flexible shell
Enter the second closure cavity by second inlet channel.
Preferably, the railcar further includes an air delivery device being connected to the flexible shell, so that described soft
Property shell is in unfolded state.
Preferably, the compartment further includes roof, the sleeve that a front and back extends is set on the roof, is set in the sleeve
A motion bar that can be slid back and forth along the sleeve is set, the rear end of the motion bar is connect with the flexible shell.
Preferably, on the roof at the headstock and the tailstock one connector worked in coordination of setting and
Connection matching piece can be linked together the railcar of front and back two by the connector and the connection matching piece.
Preferably, on the roof respectively at be provided with a driving wheel mechanism and one at the headstock and the tailstock
Driven pulley mechanism, the connector and it is described connection matching piece be separately mounted to the driving wheel mechanism mounting rack and it is described from
On the mounting rack of driving wheel mechanism.
Preferably, it is described connection matching piece can the relatively described driven pulley mechanism the elastic movement of mounting rack.
Preferably, being provided with the first electrical connector on the connector, second is provided with electrically on the connection matching piece
Connector, when the connector links together with the connection matching piece, the described first electrical connector and described second is electrically
Connector is electrically connected.
Detailed description of the invention
Fig. 1 is the working state schematic representation of middle orbit of embodiment of the present invention vehicle.
Fig. 2 is the schematic perspective view of middle orbit of embodiment of the present invention vehicle.
Fig. 3 is the schematic perspective view of the flexible shell of the first embodiment in the embodiment of the present invention.
Fig. 4 is the schematic perspective view of the flexible shell of second of embodiment in the embodiment of the present invention.
Fig. 5 is the combination schematic diagram of front housing and flexible shell in the embodiment of the present invention.
Fig. 6 is the mounting structure schematic diagram of middle sleeve of the embodiment of the present invention and motion bar.
Fig. 7 is the front side schematic diagram of flexible shell in Fig. 5.
Fig. 8 is the rear side schematic diagram of flexible shell in Fig. 5.
Fig. 9 is connector and the bonding state schematic diagram that connect matching piece in the embodiment of the present invention.
Figure 10 is the decomposition diagram that the mounting structure of matching piece is connected in Fig. 9.
Specific embodiment
For technology contents, structure feature, realization principle and the objects and the effects that the present invention will be described in detail, tie below
It closes embodiment and attached drawing is cooperated to be explained in detail.
As shown in Figures 1 to 4, the present invention discloses a kind of railcar, which hangs on track girder 1, and along track
Beam 1 is walked, and railcar includes compartment 20, and compartment 20 includes headstock 21, the tailstock 22 and roof 23, and one is covered on the tailstock 22 has gas
The flexible shell 3 of capsule structure, the i.e. flexible shell 3 can be inflated expansion, when flexible shell 3 is in unfolded state, railcar
The streamlined structure gradually tapered up on the whole to headstock 21 and the tailstock 22.It should be noted that flexible shell 3 can also be covered in vehicle
On first 21, it can also be covered in simultaneously on headstock 21 and the tailstock 22.Preferably, only covering flexibility on the tailstock 22 in the present embodiment
Shell 3 is stiff case on headstock 21.When railcar is in traveling process, flexible shell 3 can be inflated expansion, be formed
One air bag, when front and back two, railcar collides in this way, the flexible shell 3 in unfolded state can effectively slow down collision
Power, to achieve the purpose that effective protection compartment 20 and passenger.In addition, being connected to when by the head and the tail of the railcar with above structure
When forming train together, the air in flexible shell 3 can be released, be at doughy state, when vehicle docks, rear
The headstock 21 of railcar can be inserted into the flexible shell 3 of front track vehicle (such as Fig. 5), to reach more railcar seamless connections
Purpose, this just further reduces the air resistance coefficient of train entirety.Furthermore according to fluid mechanics principle, in general, vehicle
When running at high speed, vacuum area of the resistance caused by external form from rear of vehicle, vacuum area is bigger, and resistance is bigger, then
In the present embodiment, since when flexible shell 3 is in unfolded state, appearance is streamlined in gradually tapering up backward from the tailstock 22
Structure, this just effectively reduces the air flow vacuum area at 20 rear of compartment, achievees the purpose that reduce windage.Flexibility in the present embodiment
Shell 3 is in water-drop-shaped when being in unfolded state, to reduce the air resistance coefficient in compartment 20 to the maximum extent.In the present embodiment
Flexible shell 3 can form the material of airbag structure for plastic material, cloth etc., flexible shell 3 by rivet, bonding or other
Mode is fixed on the tailstock 22.
About the airbag structure of flexible shell 3, the present invention discloses two kinds of specific embodiments, one is, it is flexible such as Fig. 3
Shell 3 has an opening portion 35, and 3 opening 35 of flexible shell is connect with the tailstock 22, shape between flexible shell 3 and the tailstock 22
At one first closure cavity 30, flexible shell 3 is blown afloat to unfolded state by the way that gas to be filled in the first closure cavity 30,
In present embodiment, it is logical first air inlet can be set on the side wall of the junction or flexible shell 3 of flexible shell 3 and the tailstock 22
Road, air-flow enter the first closure cavity 30 by the first inlet channel.When the first inlet channel is arranged in flexible shell 3 and the tailstock
When 22 junction, the first inlet channel can constitute (such as Fig. 1) by the gap 32 between flexible shell 3 and compartment 20, when first
When inlet channel is arranged on the side wall of flexible shell 3, the first inlet channel can be the stomata 31 being provided on flexible shell 3
(such as Fig. 3).Railcar when driving caused by air-flow the first closure cavity 30 poured by the first inlet channel, thus by flexible shell
Body 3 is blown afloat to unfolded state, when railcar stop when driving, first closure cavity 30 in pressure-air can also by first into
Gas channel outflow, so that flexible shell 3 is in doughy state.In the present embodiment, the first closure cavity 30 is by flexible shell 3
It is enclosed jointly with the tailstock 22.
About the airbag structure of flexible shell 3, second of embodiment is that, such as Fig. 4, flexible shell 3 is a closing structure
Body, it is interior that there is the second closure cavity 34 formed by the inner wall of flexible shell 3.In the present embodiment mode, the second closure is empty
Chamber 34 is made of in itself flexible shell 3, then the second air inlet being connected to the second closure cavity 34 can be arranged on flexible shell 3
Channel, air-flow enter the second closure cavity 34 by the second inlet channel.Railcar when driving caused by high-speed flow pass through the
Two inlet channels enter the second closure cavity 34, to blowing afloat flexible shell 3 to unfolded state.In present embodiment, second
Inlet channel is all the stomata 31 being arranged on flexible shell 3.
Please refer to shown in Fig. 3 to Fig. 7, for the airbag structure of above two structure, can also by with flexible shell 3
One air delivery device of connection is blown into the first closure cavity 30 or the second closure cavity 34, so that flexible shell 3 is in exhibition
Open state.In the present embodiment, air pump 5 is can be used in air delivery device, and air pump 5 is mountable empty in the first closure cavity 30 or the second closure
In chamber 34, also on the mountable compartment 20 outside flexible shell 3, then the gas connecting with air pump 5 is set on flexible shell 3
Mouth 33, when railcar starting, booster air pump 5 is inflated by gas nozzle 33 into flexible shell 3, to guarantee that flexible shell 3 is in
Fully unfolded position.It should be noted that stomata 31 can need not be opened up on flexible shell 3 in the case where installing air pump 5 additional,
Outer gas stream passes in and out flexible shell 3 by gas nozzle 33.
Incorporated by reference to shown in Fig. 2 and Fig. 5, when being mutually connected to each other more railcars, to further decrease front and back two
Gap 32 in railcar between headstock 21 and the tailstock 22, on the headstock 21 of railcar can also one rigidity of projection front housing 4, lead to
The front housing 4 for crossing the projection, when two railcars link together, flexible shell 3 on front track vehicle is by rearward tracks vehicle
On front housing 4 package enter, thus further decrease railcar connection when be formed by gap 32.In the present embodiment, outside front housing 4
The streamlined Mongolian bag-like structure of wall, that is, play the purpose for further decreasing wind resistance coefficient of whole vehicle, thus can realize front housing 4 with
The seamless interfacing of flexible shell 3.
Incorporated by reference to the sleeve 60 that a front and back extension shown in Fig. 1 and Fig. 8, can also be arranged on roof 23, it is arranged in sleeve 60
One can connect along the motion bar 61 that sleeve 60 slides back and forth, the rear end of motion bar 61 with flexible shell 3.In the present embodiment, sleeve
A piston structure is formed between 60 and motion bar 61, when flexible shell 3 is in loose flat state, motion bar 61 can be flexible shell
3 provide support pulling force, and the rear end of flexible shell 3 is avoided to fall, and when flexible shell 3 is gradually blown afloat, drive motion bar
61 pull out from sleeve 60.In addition, due to the cooperation of sleeve 60 and motion bar 61, when two railcars collide, if
Collision of the motion bar 61 by the headstock 21 of rearward tracks vehicle, motion bar 61 can along the rapidly forward slip of sleeve 60, then
Inside sleeve 60, a barrier activity will form between one end that motion bar 61 is located in sleeve 60 and the front inner wall of sleeve 60
The reversed blocking air-flow that bar 61 moves forward slows down the speed of advancement of motion bar 61, and then subtract under the action of the reversed blocking air-flow
Slow Forward of the compartment 20 under colliding forces reduces collision to the impact force of human body and vehicle.In the present embodiment, motion bar 61
There is the gap for air disengaging between sleeve 60, so that air can slowly pass in and out sleeve 60, reach buffering collision
Purpose.
To please refer to Fig. 2 and Fig. 9, another preferable reality of railcar of the present invention convenient for the connection of the head and the tail of more railcars
It applies in example, the connector 70 and connection matching piece that setting one is worked in coordination at headstock 21 and the tailstock 22 on roof 23
71, by connector 70 and connection matching piece 71, the railcar of front and back two can be linked together.In the present embodiment, in roof
A driving wheel mechanism 80 and a driven pulley mechanism 81, connector 70 and connection are provided on 23 at headstock 21 and the tailstock 22
Matching piece 71 is separately mounted on the mounting rack 800 of driving wheel mechanism 80 and the mounting rack 810 of driven pulley mechanism 81, connector 70
For an elastic hook, connection matching piece 71 is a hanging block compatible with elastic hook.When connector 70 and connection matching piece 71
When linking together, to further avoid interlocking collision effect, such as Figure 10 caused by hitting, connection matching piece 71 can be relatively driven
The elastic movement of mounting rack 810 of mechanism 81 is taken turns, specifically, a sliding slot 90 is opened up on the mounting rack 810 of driven pulley mechanism 81,
Connection matching piece 71 is slidably connected by a connecting rod 91 with sliding slot 90, when connection matching piece 71 is by impact force in the front-back direction
When, connecting rod 91 drives 90 Forward along the chute of connection matching piece 71, to slow down impact force.In addition, can also be set on connector 70
The first electrical connector 700 is set, the electrical connector of setting second on connection matching piece 71, when connector 70 connects with matching piece 71 is connect
When being connected together, the first electrical connector 700 and the second electrical connector 710 are electrically connected.It is formed when by the railcar of above structure
When train, if the wherein power interruptions in a railcar, the above-mentioned first electrical connector 700 and the second electrical connector can be passed through
710 connection is powered by other railcars for being connected with electrical source of power for it.
The above disclosure is only a preferred example of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore according to equivalent variations made by scope of the present invention patent, still falls within the range that the present invention is covered.
Claims (11)
1. a kind of railcar, which is characterized in that including compartment, the compartment includes headstock and the tailstock, the headstock and/or the tailstock
On cover one with airbag structure flexible shell；When the flexible shell is in unfolded state, the railcar is integrally in
The streamlined structure gradually tapered up to headstock and the tailstock.
2. railcar according to claim 1, which is characterized in that the flexible shell has an opening portion, the flexibility
Shell is connect by the opening portion with the compartment, and it is empty that one first closure is formed between the flexible shell and the compartment
Chamber.
3. railcar according to claim 2, which is characterized in that the junction in the flexible shell and the compartment is soft
Property shell side wall on be provided with the first inlet channel, it is empty that air-flow can enter first closure by first inlet channel
Chamber.
4. railcar according to claim 1, which is characterized in that the flexible shell is a closing structure body, interior tool
There is the second closure cavity formed by the inner wall of the flexible shell.
5. railcar according to claim 4, which is characterized in that be provided on the flexible shell and second closure
Second inlet channel of cavity connection, air-flow enter the second closure cavity by second inlet channel.
6. railcar according to claim 1, which is characterized in that further include a gas transmission being connected to the flexible shell
Device, so that the flexible shell is in unfolded state.
7. railcar according to claim 1, which is characterized in that the compartment further includes roof, is arranged on the roof
The sleeve that one front and back extends, the motion bar that setting one can slide back and forth along the sleeve in the sleeve, after the motion bar
End is connect with the flexible shell.
8. railcar according to claim 7, which is characterized in that respectively at the headstock and the vehicle on the roof
One connector worked in coordination of setting and connection matching piece at tail, by the connector and the connection matching piece, can will before
Two railcars link together afterwards.
9. railcar according to claim 8, which is characterized in that on the roof respectively at the headstock and described
A driving wheel mechanism and a driven pulley mechanism are provided at the tailstock, the connector and the connection matching piece are separately mounted to institute
It states on the mounting rack of driving wheel mechanism and the mounting rack of the driven pulley mechanism.
10. railcar according to claim 9, which is characterized in that the connection matching piece can the relatively described driven turbine
The elastic movement of the mounting rack of structure.
11. railcar according to claim 8, which is characterized in that be provided with the first electrical connector, institute on the connector
It states and is provided with the second electrical connector, when the connector links together with the connection matching piece, institute on connection matching piece
It states the first electrical connector and the second electrical connector is electrically connected.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910706139.0A CN110329288A (en) | 2019-07-30 | 2019-07-30 | Railcar |
| PCT/CN2020/100287 WO2021017758A1 (en) | 2019-07-30 | 2020-07-04 | Rail car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910706139.0A CN110329288A (en) | 2019-07-30 | 2019-07-30 | Railcar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110329288A true CN110329288A (en) | 2019-10-15 |
Family
ID=68148256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910706139.0A Pending CN110329288A (en) | 2019-07-30 | 2019-07-30 | Railcar |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110329288A (en) |
| WO (1) | WO2021017758A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021017758A1 (en) * | 2019-07-30 | 2021-02-04 | 东莞开道科技有限公司 | Rail car |
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| CN103863421A (en) * | 2012-12-07 | 2014-06-18 | 北京精诚博桑科技有限公司 | Air flow guiding device for reducing trailer wind resistance |
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| CN106891913A (en) * | 2017-04-05 | 2017-06-27 | 深圳市小的科技有限公司 | One kind suspention small rail car attachment structure |
| CN206544514U (en) * | 2015-11-17 | 2017-10-10 | 马东升 | Intelligent folding formula bumper |
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| CN210554813U (en) * | 2019-07-30 | 2020-05-19 | 东莞开道科技有限公司 | Rail car |
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| CN102897177B (en) * | 2012-10-22 | 2016-02-17 | 唐山轨道客车有限责任公司 | Head of anti-drag motor train unit |
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| DE102016210004B4 (en) * | 2016-06-07 | 2022-05-25 | Siemens Mobility GmbH | Vehicle, in particular rail vehicle |
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2019
- 2019-07-30 CN CN201910706139.0A patent/CN110329288A/en active Pending
-
2020
- 2020-07-04 WO PCT/CN2020/100287 patent/WO2021017758A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20130196519A1 (en) * | 2010-09-17 | 2013-08-01 | Harting Electric Gmbh & Co. Kg | Electric coupling for railways |
| CN103863421A (en) * | 2012-12-07 | 2014-06-18 | 北京精诚博桑科技有限公司 | Air flow guiding device for reducing trailer wind resistance |
| CN205589317U (en) * | 2015-11-17 | 2016-09-21 | 马东升 | Foldable additional rear of a vehicle |
| CN206544514U (en) * | 2015-11-17 | 2017-10-10 | 马东升 | Intelligent folding formula bumper |
| CN105365717A (en) * | 2015-12-08 | 2016-03-02 | 莆田市云驰新能源汽车研究院有限公司 | Automobile turbulence device capable of reducing wind resistance |
| CN106891913A (en) * | 2017-04-05 | 2017-06-27 | 深圳市小的科技有限公司 | One kind suspention small rail car attachment structure |
| CN107554534A (en) * | 2017-09-20 | 2018-01-09 | 莱芜美澳冶金科技有限公司 | A kind of dual-purpose shared traffic system for overhead track in new energy vacant lot and operation method |
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| CN207875664U (en) * | 2018-01-11 | 2018-09-18 | 江苏添仂智能科技有限公司 | A kind of automobile-used beam of suspension type rail |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021017758A1 (en) * | 2019-07-30 | 2021-02-04 | 东莞开道科技有限公司 | Rail car |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021017758A1 (en) | 2021-02-04 |
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