CN110011463B - Wire passing structure of fuel pump motor - Google Patents
Wire passing structure of fuel pump motor Download PDFInfo
- Publication number
- CN110011463B CN110011463B CN201910408539.3A CN201910408539A CN110011463B CN 110011463 B CN110011463 B CN 110011463B CN 201910408539 A CN201910408539 A CN 201910408539A CN 110011463 B CN110011463 B CN 110011463B
- Authority
- CN
- China
- Prior art keywords
- wire
- wire passing
- hole
- motor
- fuel pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 21
- 239000004033 plastic Substances 0.000 claims abstract description 50
- 229920003023 plastic Polymers 0.000 claims abstract description 50
- RVCKCEDKBVEEHL-UHFFFAOYSA-N 2,3,4,5,6-pentachlorobenzyl alcohol Chemical compound OCC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl RVCKCEDKBVEEHL-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000565 sealant Substances 0.000 claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims 1
- 238000004880 explosion Methods 0.000 abstract description 8
- 238000007789 sealing Methods 0.000 abstract description 8
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 238000001746 injection moulding Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 208000002925 dental caries Diseases 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000004382 potting Methods 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/136—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas explosion-proof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention discloses a wire passing structure of a fuel pump motor, which comprises a casing, wherein two cavities for accommodating the motor and a PCBA board are arranged in the casing, a through hole for communicating the two cavities is arranged on the casing, a plastic bracket for sealing and plugging the through hole is arranged in the through hole, at least one wire passing hole penetrating front and back is arranged on the plastic bracket, a wire for connecting the motor and the PCBA board passes through the wire passing hole, and pouring sealant for sealing is filled between the wire passing hole and the wire. The invention can divide the motor and the motor controller into two cavities of the same shell, isolate the gas between the two cavities, prevent the controller from being damaged by the influence of explosion, and has the characteristics of simple structure, small volume, low cost and high reliability, thereby being applicable to the requirements of small occasions such as automobiles and the like.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a wire passing structure of a fuel pump motor.
Background
The vehicle-mounted fuel pump drives the booster pump motor, because the motor works in a gas environment, the pump head is a gas flow channel, so that the inside of the motor needs to have better sealing and explosion-proof performance, and the connection of wires of the motor bin and the controller bin becomes the key of the explosion-proof problem; in order to realize the explosion-proof effect of working in a gas environment, the existing explosion-proof motor structure is high in cost, complex in structure and not suitable for miniaturized occasions such as vehicles.
At present, an explosion-proof motor mainly adopts a split type structure, namely a motor part and a controller box of the motor are divided into two different shells, wires in a motor cavity are led out through an explosion-proof gram head, and a section of cable is connected to the controller box.
The other structure of the explosion-proof motor is that the motor and a controller (specifically a PCBA board) of the motor are positioned in a cavity, and share a shell, and a separation structure is not adopted, so that the explosion-proof motor has the advantages of simple structure and better product weight, but because the product works in a gas environment, the inside of the motor is in the gas atmosphere, the bearing, the rotor and other structures of a motor bin have the risk of generating sparks to cause explosion in the bin, and the electronic components in the controller have poorer capability of resisting the deflagration, so that the reliability of the structure is poorer, and the product has failure risk in the use process.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a wire passing structure of a fuel pump motor, which can divide a motor and a controller of the motor into two cavities of the same casing, isolate gas between the two cavities, prevent the controller from being damaged by the influence of explosion, and has the characteristics of simple structure, small volume, low cost and high reliability, thereby being suitable for the requirements of small occasions such as automobiles.
In order to solve the technical problems, the invention provides a wire passing structure of a fuel pump motor, which comprises a machine shell, wherein two cavities for accommodating the motor and a PCBA board are arranged in the machine shell, through holes for communicating the two cavities are formed in the machine shell, a plastic bracket for sealing and blocking the through holes is arranged in the through holes, at least one wire passing hole penetrating front and back is formed in the plastic bracket, a wire for connecting the motor and the PCBA board passes through the wire passing hole, and potting adhesive for sealing is filled between the wire passing hole and the wire.
Further, the plastic support is fixed to the through hole in an insert mode, and the plastic support is formed through injection molding in an injection molding mode.
Further, the edges of the through holes are provided with convex edges extending forwards and backwards, the edges of the through holes are in a convex V shape, and the V shape and the convex edges are combined to form an arrow structure.
Further, an arrow-shaped open slot matched with the arrow structure is formed in the periphery of the plastic support, so that the plastic support is clamped in the through hole.
Further, grooves surrounding the wire through holes are formed in the front end face and/or the rear end face of the plastic support, and the pouring sealant is filled in the grooves.
Further, the wire passing structure of the fuel pump motor further comprises a wiring terminal used for connecting the PCBA plate and the wires, the wiring terminal is fixed on the plastic bracket, and the wiring terminal is located in a cavity for accommodating the PCBA plate.
Further, the plastic bracket is provided with a fixing part for fixing the wiring terminal in a protruding mode, and the position, where the wiring terminal is fixed on the fixing part, is provided with a barb.
Further, a semicircular hook is arranged at one end, connected with the wire, of the wiring terminal, and the wire is inserted into the semicircular hook and welded together.
Further, the number of the wires is consistent with that of the motor, and the number of the wire through holes and the wiring terminals are consistent with that of the wires and are matched in a one-to-one correspondence mode.
Further, the wiring terminal is right-angle; the shell is a metal shell; the lead is a copper lead.
The invention has the following beneficial effects:
according to the invention, the motor and the controller (PCBA board) of the motor are arranged in two cavities of the same shell, and wires for connecting the motor and the controller are insulated and sealed by using the plastic support and the pouring sealant, so that gas between the two cavities is isolated, gas in the cavity for accommodating the motor cannot enter the cavity for accommodating the controller, and the controller in the other cavity cannot be contacted by the explosion generated in the cavity for accommodating the motor, so that the controller is prevented from being damaged due to the influence of the explosion, the safety and reliability of the controller are greatly improved, and the reliability of a product is further improved; the fuel pump motor wire passing structure has the characteristics of simple structure, convenient assembly, small volume, low cost and high reliability.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate and do not limit the invention, and together with the description serve to explain the principle of the invention:
FIG. 1 is a schematic diagram of a fuel pump motor wire-passing structure in an embodiment;
FIG. 2 is a partial schematic view of an embodiment where a fuel pump motor wire passing position is located in a housing;
FIG. 3 is a cross-sectional view of an embodiment of a plastic bracket at a via;
fig. 4 is a schematic top view of the mating of the terminal with the wire and plastic bracket in an embodiment.
Detailed Description
For a more complete understanding of the present invention, reference should be made to the following descriptions and illustrations of the present invention in conjunction with the accompanying drawings and the detailed description thereof; it should be noted that, the descriptions of "first" and "second" herein are used to distinguish different components, and do not represent a sequence, and the descriptions of "first" and "second" are not limited to different types.
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
Examples
As shown in fig. 1 to 4, the wire passing structure of the fuel pump motor in this embodiment includes a casing 1 made of metal, two cavities 11 for accommodating the motor and the PCBA board 2 are provided in the casing 1, a through hole 12 for communicating the two cavities 11 is provided on the casing 1, a plastic support 4 for sealing and plugging the through hole is provided in the through hole 12, at least one wire passing hole 41 penetrating from front to back is provided on the plastic support 4, a wire 5 for connecting the motor and the PCBA board 2 passes through the wire passing hole 41, and a potting adhesive 7 for sealing is filled between the wire passing hole 41 and the wire 5; above-mentioned in, through set up two spaced apart cavitys in the casing to utilize plastic bracket and pouring sealant to seal the shutoff to through-hole and wire hole, when making motor and PCBA board in two cavitys utilize the wire to communicate, gas between two cavitys is thoroughly sealed isolated, the cavity that is used for the unable entering accommodation controller of the gas in the cavity of accommodation motor, the controller in another cavity can not be touched in the internal emergence blasting of cavity of accommodation motor, prevent that the controller from receiving blasting influence and damaging, greatly increased the security and the reliability of controller, and then increased product reliability.
Specifically, the plastic bracket 4 is fixed in the through hole 12 in an insert mode, and the plastic bracket 4 is injection molded in an injection molding mode, so that the plastic bracket and the casing are combined into a whole in the injection molding process, the combination of the plastic bracket and the casing is firm and reliable, no gap exists between the plastic bracket and the casing, and the tightness and the reliability between the plastic bracket and the casing are ensured.
Considering the practical application environment of the fuel pump motor, in the using process, the explosion phenomenon easily occurs in a cavity for accommodating the motor, the plastic bracket can bear larger pressure during the explosion, and the plastic bracket and the shell are combined together only in an injection molding mode without a corresponding fixed structure, so that the plastic bracket is easy to separate from the shell or loose after being pressed during the explosion, and the tightness is easily affected by gaps after the looseness; therefore, in this embodiment, a specific fixing structure between the plastic support and the casing is further provided, specifically, the peripheral edges of the through hole 12 are provided with convex edges 13 extending forward and backward and protruding, the peripheral edge ends of the through hole 12 are both in a convex V shape 14 (i.e. the upper side and the lower side of the peripheral edge of the through hole are both oblique sides), the V shape 14 and the convex edges 13 are combined to form an arrow structure 6, the periphery of the plastic support 4 is provided with an arrow-shaped open slot 42 matched with the arrow structure 6, and the plastic support is clamped and fixed in the through hole through the matching of the arrow structure and the arrow-shaped open slot, so that the plastic support cannot generate transverse, longitudinal and vertical displacement relative to the casing, the problem that the plastic support cannot loose or fall off due to compression is ensured, the contact area and the binding force between the plastic support and the casing are increased, the problem of a gap between the two cavities is effectively avoided, and the firmness and reliability after the two cavities are combined are improved.
Specifically, the front end face and/or the rear end face of the plastic bracket 4 are provided with grooves 43 surrounding the wire holes 41, and the pouring sealant 7 is filled in the grooves 43 and is in contact with the wires, so that the wire holes are sealed and blocked; filling the pouring sealant in the groove can ensure and improve the reliability of sealing and plugging.
In this embodiment, the wire passing structure of the fuel pump motor further includes a connection terminal 8 for connecting the PCBA board 2 and the wires 5, the connection terminal 8 is fixed on the plastic bracket 4, and the connection terminal 8 is located in the cavity for accommodating the PCBA board 2; the plastic bracket 4 is provided with a fixing part 3 for fixing the wiring terminal 8 in a protruding way, so that the wiring terminal is fixed on the plastic bracket, the connection between the wiring terminal and the wire and the PCBA board is facilitated, and the assembly process is simplified; and the two sides of the position of the binding post 8 fixed on the fixed part 3 are provided with barbs 82 respectively, so that the binding force between the binding post and the fixed part is enhanced.
One end of the wiring terminal 8, which is connected with the wire 5, is provided with a semicircular hook 81, the wire 5 is inserted into the middle of the semicircular hook 81 and welded together in a butt-joint mode, and the shape characteristics of the semicircular hook 81 are utilized to enable the wiring terminal and the wire to form a semi-cladding structure after being welded, so that the welding area between the wire and the wiring terminal is increased, the firmness and the connection reliability after the wire and the wiring terminal are combined are improved, and the requirement of electric connection is met.
The number of the wires is consistent with that of the motor, and the number of the wire through holes and the wiring terminals are consistent with that of the wires and are matched in a one-to-one correspondence manner; in this embodiment, the motor is a three-phase motor, correspondingly, three wires 5 connected with the motor are arranged on the plastic bracket 4 at intervals, three wire through holes 41 which are arranged in parallel and are in one-to-one correspondence with the three wires, and three wire connecting terminals 8 are also arranged and are in one-to-one correspondence and matched connection with the three wires; the grooves are arranged around the three wire through holes, but not around one groove respectively around each wire through hole, so that the plastic bracket is convenient to process during injection molding.
The wiring terminal 8 is in a right angle shape, the right angle turning part in the wiring terminal 8 is fixed on the plastic bracket, and barbs combined with the fixing parts are arranged on two sides of the two right angle sides; two right-angle sides are respectively protruded out of the plastic support and respectively extend transversely and longitudinally, wherein a semicircular hook 81 is arranged on one right-angle side and is welded with a wire, the end part of the other right-angle side is inserted into a corresponding jack in the PCBA board, then the wiring terminal and the PCBA board are welded together by using soldering tin, the space inside a cavity can be better saved by adopting the right-angle wiring terminal, and the assembly of the PCBA board can be facilitated.
In this embodiment, the conductive wire 5 is a copper conductive wire.
In other embodiments of the present invention, the motor may be a two-phase motor, a four-phase motor, or a five-phase motor, and the number of wires and terminals matched with the motor is the same as the number of phases of the motor.
In other embodiments of the invention, the potting adhesive is an epoxy adhesive.
In other embodiments of the present invention, the barbs on two sides of the same right-angle side are arranged in a front-back staggered manner, so that stability and reliability can be further enhanced.
In other embodiments of the present invention, to facilitate insertion of a wire into and through a via, the aperture of the via is designed as a beveled chamfer of the bevel.
In other embodiments of the present invention, a corresponding groove surrounding each via hole may be disposed around each via hole, so that the grooves around the periphery of the three via holes are separated.
In a similar scheme of the invention, the wire on the motor and the PCBA board are connected by the plug connector through injection molding in the plastic bracket while injection molding the plastic bracket, but in the structure, the wire on the motor is difficult to connect with the plug connector, wire redundancy exists in a cavity for accommodating the motor, and meanwhile, the plug connector has the characteristics of poor vibration resistance and the like, so that the connection reliability is relatively poor.
The foregoing has described in detail the technical solutions provided by the embodiments of the present invention, and specific examples have been applied to illustrate the principles and implementations of the embodiments of the present invention, where the above description of the embodiments is only suitable for helping to understand the principles of the embodiments of the present invention; meanwhile, as for those skilled in the art, according to the embodiments of the present invention, there are variations in the specific embodiments and the application scope, and the present description should not be construed as limiting the present invention.
Claims (7)
1. The utility model provides a fuel pump motor wire passing structure, includes the casing, its characterized in that is equipped with two cavities that are used for holding motor and PCBA board respectively in the casing, be equipped with the through-hole of two intercommunication cavities on the casing, be equipped with the plastics support that is used for sealed shutoff through-hole in the through-hole, be equipped with at least one wire passing hole that pierces through from front to back on the plastics support, the wire that connects motor and PCBA board passes the wire passing hole, just fill between wire passing hole and the wire and be used for sealed pouring sealant;
the periphery of the through hole is provided with convex edges extending forwards and backwards, the periphery of the through hole is in a convex V shape, and the V shape and the convex edges are combined to form an arrow structure; the periphery of the plastic support is provided with an arrow-shaped open slot matched with the arrow structure, so that the plastic support is clamped in the through hole in an insert manner; the plastic bracket is injection molded in a mode of package molding.
2. The wire passing structure of the fuel pump motor according to claim 1, wherein grooves surrounding the wire passing holes are formed in the front end face and/or the rear end face of the plastic support, and the pouring sealant is filled in the grooves.
3. The fuel pump motor wire passing structure according to claim 1 or 2, further comprising a terminal for connecting the PCBA board and a wire, the terminal being fixed to the plastic bracket, and the terminal being located in a cavity accommodating the PCBA board.
4. The wire passing structure of the fuel pump motor according to claim 3, wherein the plastic bracket is provided with a fixing part for fixing the terminal, and the position of the terminal fixed on the fixing part is provided with a barb.
5. The fuel pump motor wire passing structure according to claim 4, wherein one end of the connection terminal connected to the wire is provided with a semicircular hook, and the wire is inserted into the semicircular hook and welded together.
6. The fuel pump motor wire passing structure according to claim 5, wherein the number of wires is identical to the number of phases of the motor, and the number of wire passing holes and wire connecting terminals is identical to the number of wires and is matched in a one-to-one correspondence manner.
7. The fuel pump motor wire passing structure according to claim 6, wherein the connection terminal is in a right angle shape; the shell is a metal shell; the lead is a copper lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910408539.3A CN110011463B (en) | 2019-05-16 | 2019-05-16 | Wire passing structure of fuel pump motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910408539.3A CN110011463B (en) | 2019-05-16 | 2019-05-16 | Wire passing structure of fuel pump motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110011463A CN110011463A (en) | 2019-07-12 |
| CN110011463B true CN110011463B (en) | 2024-04-02 |
Family
ID=67177176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910408539.3A Active CN110011463B (en) | 2019-05-16 | 2019-05-16 | Wire passing structure of fuel pump motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110011463B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2842274Y (en) * | 2005-11-04 | 2006-11-29 | 上海市宝山区青少年科学技术指导站 | Anti-burst control box for air-conditioner |
| WO2012103983A2 (en) * | 2011-02-04 | 2012-08-09 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Direct current electric motor in an explosion proof design |
| CN103216890A (en) * | 2013-04-25 | 2013-07-24 | 广东志高空调有限公司 | Whole moving type anti-explosion air conditioner |
| CN203850945U (en) * | 2013-10-07 | 2014-09-24 | 江门市地尔汉宇电器股份有限公司 | Drainage pump motor equipped with connector accessory |
| WO2017107315A1 (en) * | 2015-12-23 | 2017-06-29 | 中山大洋电机股份有限公司 | Plastic package stator of external rotor motor and external rotor motor having same |
| CN107317424A (en) * | 2017-07-28 | 2017-11-03 | 卧龙电气集团股份有限公司 | A kind of high pressure composite anti-explosion type threephase asynchronous |
| CN107947439A (en) * | 2017-12-21 | 2018-04-20 | 宁夏西北骏马电机制造股份有限公司 | Electrical control babinet and motor fixed connection method |
| CN209730947U (en) * | 2019-05-16 | 2019-12-03 | 深圳南方德尔汽车电子有限公司 | Fuel pump motor string-passing structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8227947B2 (en) * | 2009-08-10 | 2012-07-24 | Stainless Motors, Inc. | Electric motor for use in hazardous environments |
-
2019
- 2019-05-16 CN CN201910408539.3A patent/CN110011463B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2842274Y (en) * | 2005-11-04 | 2006-11-29 | 上海市宝山区青少年科学技术指导站 | Anti-burst control box for air-conditioner |
| WO2012103983A2 (en) * | 2011-02-04 | 2012-08-09 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Direct current electric motor in an explosion proof design |
| CN103216890A (en) * | 2013-04-25 | 2013-07-24 | 广东志高空调有限公司 | Whole moving type anti-explosion air conditioner |
| CN203850945U (en) * | 2013-10-07 | 2014-09-24 | 江门市地尔汉宇电器股份有限公司 | Drainage pump motor equipped with connector accessory |
| WO2017107315A1 (en) * | 2015-12-23 | 2017-06-29 | 中山大洋电机股份有限公司 | Plastic package stator of external rotor motor and external rotor motor having same |
| CN107317424A (en) * | 2017-07-28 | 2017-11-03 | 卧龙电气集团股份有限公司 | A kind of high pressure composite anti-explosion type threephase asynchronous |
| CN107947439A (en) * | 2017-12-21 | 2018-04-20 | 宁夏西北骏马电机制造股份有限公司 | Electrical control babinet and motor fixed connection method |
| CN209730947U (en) * | 2019-05-16 | 2019-12-03 | 深圳南方德尔汽车电子有限公司 | Fuel pump motor string-passing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110011463A (en) | 2019-07-12 |
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