CN214797463U - Punching device for multi-element doped high-rate lithium manganate composite positive electrode material - Google Patents
Punching device for multi-element doped high-rate lithium manganate composite positive electrode material Download PDFInfo
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- CN214797463U CN214797463U CN202120915805.4U CN202120915805U CN214797463U CN 214797463 U CN214797463 U CN 214797463U CN 202120915805 U CN202120915805 U CN 202120915805U CN 214797463 U CN214797463 U CN 214797463U
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model discloses a multielement mixes compound cathode material of high magnification lithium manganate and uses device of punching a hole, comprises a workbench, rotate through the bearing between the relative both sides inner wall of workstation and be connected with the reel, and the winding has the conveyer belt between two reels, install the spacing section of thick bamboo that is equidistant structure distribution through the bolt on conveyer belt top outer wall and the bottom outer wall, install the motor through the bolt on the outer wall of workstation one side, and the one end of one of them reel is fixed connection through the output of parallel key with the motor, top shell is installed through the bolt in workstation top outer wall both sides, and top shell top outer wall center department installs the cylinder through the bolt. The conveying belt of the utility model can convey the lithium ion battery by matching with the limiting cylinder, thereby leading the equipment to continuously carry out the hole pricking treatment on the lithium ion battery; when the equipment is used for punching the lithium ion batteries, the plurality of needle cylinders on the substrate can simultaneously punch the plurality of lithium ion batteries, so that the punching efficiency is improved.
Description
Technical Field
The utility model relates to a lithium manganate anode material production facility technical field especially relates to a multielement dopes compound anode material of high rate lithium manganate with device of punching.
Background
Currently, a lithium ion battery is a secondary battery (rechargeable battery) that mainly operates by movement of lithium ions between a positive electrode and a negative electrode. During charging and discharging, Li + is inserted and extracted back and forth between two electrodes: during charging, Li + is extracted from the positive electrode and is inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; when discharging, the battery generally adopts a material containing lithium as an electrode, which is a representative of modern high-performance batteries.
At present, the current lithium manganate positive electrode material of lithium ion battery needs to be pricked to handle, but current equipment of pricking can not be in succession to the lithium ion battery and handle, and current equipment of pricking is lower to lithium ion battery treatment effeciency simultaneously, influences lithium ion battery's production, consequently, needs to design a many element doping high rate lithium manganate composite positive electrode material and solves above-mentioned problem with pricking device urgently.
Disclosure of Invention
The utility model aims at solving the current lithium ion battery equipment of punching that exists among the prior art and can not be in succession to the lithium ion battery the shortcoming of punching and punching equipment inefficiency, and the compound anode material of a multielement doping high magnification lithium manganate is with punching device that proposes.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a punching device for a multi-element doped high-rate lithium manganate composite anode material comprises a workbench, wherein winding drums are rotatably connected between the inner walls of two opposite sides of the workbench through bearings, a conveyer belt is wound between the two winding drums, the outer walls of the top and the bottom of the conveyer belt are provided with limit drums which are distributed in an equidistant structure through bolts, the outer wall of one side of the workbench is provided with a motor through bolts, one end of one winding drum is fixedly connected with the output end of the motor through a flat key, two sides of the outer wall of the top of the workbench are provided with top shells through bolts, and the center of the outer wall of the top shell is provided with a cylinder through a bolt, the output end of the cylinder is provided with a base plate through a bolt, and the outer wall of the bottom of the substrate is in threaded connection with syringes distributed in an equidistant structure, and the center of the outer wall of the bottom of the substrate is provided with a photoelectric sensor through a bolt.
The key concept of the technical scheme is as follows: when the equipment is used for pricking the lithium ion battery, the conveying belt is matched with the limiting cylinder to convey the lithium ion battery, so that the equipment can continuously prick the lithium ion battery; when the equipment is used for punching the lithium ion batteries, the plurality of needle cylinders on the substrate can simultaneously punch the plurality of lithium ion batteries, so that the punching efficiency is improved.
Furthermore, the connecting pipes are installed on two sides of the inner wall of the top shell through bolts, telescopic pipes distributed in an equidistant structure are inserted into the outer wall of the bottom of the connecting pipe, the bottom ends of the telescopic pipes are communicated with the needle cylinder, and door curtains are installed on the inner wall of the top shell close to the two sides through bolts.
Further, install the case that gathers materials through the bolt on the epitheca one side outer wall, and gather materials and install the air extractor through the bolt in workbin bottom outer wall one side, it has the gas-supply pipe that extends to the epitheca outside to peg graft in connecting pipe top outer wall one side, and the one end that the connecting pipe was kept away from to the gas-supply pipe extends to inside the case that gathers materials.
Further, install the control cabinet through the bolt on the outer wall of top shell one side, install the cooler that link up each other with the workstation through the bolt on the outer wall of workstation one side, and the cooler is electric connection through wire and control cabinet.
Furthermore, slide bars which are distributed in an equidistant structure are inserted into two sides of the outer wall of the top of the base plate, a top plate is welded to the top ends of the slide bars, and springs sleeved outside the slide bars are installed on the outer wall of the bottom of the top plate and between the outer wall of the top of the base plate through bolts.
Furthermore, a pressing plate is installed on the outer wall of the bottom of the sliding rod through a bolt, and a rubber pad is bonded on the outer wall of the bottom of the pressing plate.
The utility model has the advantages that:
1. through the conveyer belt and the spacing section of thick bamboo that set up, when using this equipment to prick the hole to lithium ion battery, the cooperation of conveyer belt and spacing section of thick bamboo can carry lithium ion battery to make this equipment carry out the hole processing to lithium ion battery in succession.
2. Through the base plate and the needle cylinders, when the equipment is used for punching the lithium ion batteries, the plurality of needle cylinders on the base plate can simultaneously punch the plurality of lithium ion batteries, and the punching efficiency is improved.
3. Through the clamp plate that sets up, when using this equipment to prick the eye to handle lithium ion battery, the clamp plate can tightly push down lithium ion battery under the effect of spring, avoids lithium ion battery to appear rocking when pricking the eye.
4. Through the case and the air extractor that gather materials that set up, when using this to prick the hole, the staff can start the air extractor for it is the negative pressure to gather materials incasement, thereby inhales the material that stays in the inside of cylinder after pricking the cylinder in the case of gathering materials, so that reduce the waste to the resource.
Drawings
Fig. 1 is a schematic structural view of a punching device for a multi-element doped high-rate lithium manganate composite positive electrode material provided by the present invention;
fig. 2 is a schematic structural view of a workbench of a punching device for a multi-element doped high-rate lithium manganate composite positive electrode material provided by the present invention;
fig. 3 is a side view of a top shell structure of a punching device for a multi-element doped high-rate lithium manganate composite positive electrode material provided by the present invention;
fig. 4 is a sectional view of a top shell structure of a punching device for a multi-element doped high-rate lithium manganate composite positive electrode material provided by the present invention;
fig. 5 is a schematic structural view of a base plate and a needle cylinder of a punching device for a multi-element doped high-rate lithium manganate composite positive electrode material provided by the present invention;
fig. 6 is a control flow chart of the multi-element doping high-rate lithium manganate composite anode material piercing device provided by the utility model.
In the figure: 1 workbench, 2 conveyer belts, 3 limiting cylinders, 4 top shells, 5 control tables, 6 air cylinders, 7 air conveying pipes, 8 door curtains, 9 motors, 10 material collecting boxes, 11 air extractors, 12 coolers, 13 winding drums, 14 connecting pipes, 15 telescopic pipes, 16 base plates, 17 needle cylinders, 18 sliding rods, 19 top plates, 20 springs, 21 pressing plates, 22 rubber pads and 23 photoelectric sensors.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Please refer to fig. 1 to 6 simultaneously, a punching device for a multi-element doped high-rate lithium manganate composite anode material, comprising a workbench 1, wherein drums 13 are rotatably connected between inner walls of two opposite sides of the workbench 1 through bearings, the drums 13 are convenient for mounting conveyer belts 2, the conveyer belts 2 are wound between the two drums 13, the conveyer belts 2 are convenient for conveying lithium ion batteries, the outer walls of the top and the bottom of the conveyer belts 2 are provided with limiting cylinders 3 distributed in an equidistant structure through bolts, the outer wall of one side of the workbench 1 is provided with a motor 9 through bolts, the motor 9 is preferably 57J1880-830 in type, so as to provide power for the rotation of the drums 13, one end of one drum 13 is fixedly connected with the output end of the motor 9 through a flat key, top shells 4 are mounted on two sides of the outer wall of the top of the workbench 1 through bolts, and the top shells 4 are convenient for mounting cylinders 6, and top shell 4 top outer wall center department installs cylinder 6 through the bolt, and cylinder 6 model is preferred SC80 400, is convenient for make the base plate 16 motion, base plate 16 is installed through the bolt to cylinder 6's output, and base plate 16 is convenient for install cylinder 17, and threaded connection has cylinder 17 that is equidistant structure distribution on the outer wall of base plate 16 bottom, and cylinder 17 is convenient for prick the eye and handle lithium ion battery, base plate 16 bottom outer wall center department has photoelectric sensor 23 through the bolt mounting, and photoelectric sensor 23 model is preferred PU05-TDNB-T2, is convenient for remove base plate 16 position department at lithium ion battery for equipment such as this equipment automatic control cylinder 6 starts.
As can be seen from the above description, the present invention has the following advantages: when the equipment is used for pricking the lithium ion battery, the conveying belt 2 is matched with the limiting cylinder 3 to convey the lithium ion battery, so that the equipment can continuously prick the lithium ion battery; when the equipment is used for pricking the lithium ion batteries, the plurality of needle cylinders 17 on the base plate 16 can prick the plurality of lithium ion batteries simultaneously, and the pricking efficiency is improved.
Furthermore, connecting pipes 14 are installed on two sides of the inner wall of the top shell 4 through bolts, telescopic pipes 15 which are distributed in an equidistant structure are inserted into the outer wall of the bottom of the connecting pipe 14, the telescopic pipes 15 are convenient to communicate the connecting pipe 14 with a needle cylinder 17, the bottom end of each telescopic pipe 15 is communicated with the needle cylinder 17, door curtains 8 are installed on the inner wall of the top shell 4 close to the two sides through bolts, and the door curtains 8 are convenient to make the top shell 4 airtight.
Furthermore, install case 10 that gathers materials through the bolt on the outer wall of top shell 4 one side, and gather materials and install aspirator 11 through the bolt in case 10 bottom outer wall one side, aspirator 11 model is preferred ZW512-7005 and supplyes material box 3700, is convenient for make and gathers materials and become the negative pressure in the case 10, peg graft in connecting pipe 14 top outer wall one side and have the gas-supply pipe 7 that extends to the top shell 4 outside, and the inside material of cylinder 17 flows into case 10 that gathers materials is convenient for to gas-supply pipe 7, and the one end that connecting pipe 14 was kept away from to gas-supply pipe 7 extends to gathering materials and expects inside 10.
Further, install control cabinet 5 through the bolt on the outer wall of top shell 4 one side, control cabinet 5 is convenient for control this equipment operation, install through the bolt on the outer wall of 1 one side of workstation and the workstation 1 cooler 12 that link up each other, cooler 12 is convenient for make the inside change cold of cavity that top shell 4 and workstation 1 constitute for this equipment begins to process, and cooler 12 is electric connection through wire and control cabinet 5.
Furthermore, slide bars 18 which are distributed in an equidistant structure are inserted into two sides of the outer wall of the top of the base plate 16, a top plate 19 is welded at the top end of each slide bar 18, a spring 20 is convenient to mount on each top plate 19, a spring 20 sleeved outside each slide bar 18 is mounted between the outer wall of the bottom of each top plate 19 and the outer wall of the top of the base plate 16 through bolts, and the spring 20 enables a pressing plate 21 to press the lithium ion battery conveniently.
Furthermore, a pressing plate 21 is installed on the outer wall of the bottom of the sliding rod 18 through a bolt, the pressing plate 21 is of an annular structure, the needle cylinder 17 is located inside a structure formed by the four sliding rods 18 which are distributed annularly and the hollow parts of the pressing plate 21, the pressing plate 21 is convenient for pressing the lithium ion battery under the action of the spring 20, a rubber pad 22 is bonded on the outer wall of the bottom of the pressing plate 21, and the pressing plate 21 is prevented from damaging the lithium ion battery by the rubber pad 22.
By adopting the pressing plate 21, when the device is used for pricking the holes of the lithium ion battery, the pressing plate 21 can tightly press the lithium ion battery under the action of the spring 20, so that the lithium ion battery is prevented from shaking during pricking; when the pricking hole is used, a worker can start the air pump 11 to enable the interior of the material collecting box 10 to be negative pressure, so that materials left in the needle cylinder 17 after the needle cylinder 17 is pricked are sucked into the material collecting box 10, and waste of resources is reduced.
In the following, some preferred embodiments or application examples are listed to help those skilled in the art to better understand the technical content of the present invention and the technical contribution of the present invention to the prior art:
example 1
The utility model provides a compound cathode material of many elements doping high magnification lithium manganate is with device of punching a hole, includes workstation 1, it is connected with reel 13 to rotate through the bearing between the relative both sides inner wall of workstation 1, and reel 13 is convenient for install conveyer belt 2, and the winding has conveyer belt 2 between two reels 13, and conveyer belt 2 is convenient for carry lithium ion battery, install the spacing section of thick bamboo 3 that is equidistance structure distribution through the bolt on 2 top outer walls of conveyer belt and the bottom outer wall, install motor 9 through the bolt on workstation 1 one side outer wall, the preferred 57J1880-830 of motor 9 model is convenient for provide power for reel 13 rotates, and the one end of one of them reel 13 is fixed connection through the parallel key and the output of motor 9, top shell 4 is installed through the bolt in workstation 1 top outer wall both sides, and top shell 4 is convenient for installing cylinder 6, and top shell 4 top outer wall center department installs cylinder 6 through the bolt, the cylinder 6 model is preferably SC80 × 400, is convenient for make the base plate 16 move, base plate 16 is installed through the bolt to the output of cylinder 6, and base plate 16 is convenient for install cylinder 17, and threaded connection has cylinder 17 that is equidistant structure distribution on the outer wall of base plate 16 bottom, and cylinder 17 is convenient for prick the eye to lithium ion battery and is handled, base plate 16 bottom outer wall center department has photoelectric sensor 23 through the bolt installation, and photoelectric sensor 23 model is preferably PU05-TDNB-T2, is convenient for remove base plate 16 position department at lithium ion battery for equipment such as this equipment automatic control cylinder 6 starts.
The two sides of the inner wall of the top shell 4 are both provided with connecting pipes 14 through bolts, the outer wall of the bottom of each connecting pipe 14 is spliced with telescopic pipes 15 which are distributed in an equidistant structure, the telescopic pipes 15 are convenient for communicating the connecting pipes 14 with a needle cylinder 17, the bottom ends of the telescopic pipes 15 are mutually communicated with the needle cylinder 17, the inner wall of the top shell 4, close to the two sides, is provided with door curtains 8 through bolts, and the door curtains 8 are convenient for sealing the top shell 4; the outer wall of one side of the top shell 4 is provided with a material collecting box 10 through a bolt, one side of the outer wall of the bottom of the material collecting box 10 is provided with an air pump 11 through a bolt, the type of the air pump 11 is preferably ZW 512-7005-; the control console 5 is mounted on the outer wall of one side of the top shell 4 through bolts, the control console 5 is convenient for controlling the equipment to run, the cooling machine 12 communicated with the workbench 1 is mounted on the outer wall of one side of the workbench 1 through bolts, the cooling machine 12 is convenient for cooling the inside of a cavity formed by the top shell 4 and the workbench 1, the equipment starts to be processed, and the cooling machine 12 is electrically connected with the control console 5 through a lead; the two sides of the outer wall of the top of the base plate 16 are respectively inserted with sliding rods 18 which are distributed in an equidistant structure, the top ends of the sliding rods 18 are welded with top plates 19, the top plates 19 facilitate mounting of springs 20, the springs 20 which are sleeved outside the sliding rods 18 are mounted on the outer wall of the bottom of the top plates 19 and the outer wall of the top of the base plate 16 through bolts, and the springs 20 facilitate pressing of a pressing plate 21 on the lithium ion battery; the pressing plate 21 is mounted on the outer wall of the bottom of the sliding rod 18 through a bolt, the pressing plate 21 is convenient for pressing the lithium ion battery under the action of the spring 20, the rubber pad 22 is bonded on the outer wall of the bottom of the pressing plate 21, and the rubber pad 22 prevents the pressing plate 21 from damaging the lithium ion battery.
The working principle is as follows: when the lithium ion battery pressing device is used, a worker can lower a lithium ion battery to be placed inside the limiting barrel 3, then the worker starts the motor 9 through the control console 5, the winding barrel 13 rotates, the conveying belt 2 conveys the lithium ion battery, meanwhile, the worker starts the cooling machine 12 through the control console 5, the inside of the top shell 4 is in a low-temperature environment, ignition of the lithium ion battery due to overhigh temperature when a needle cylinder punctures is avoided, meanwhile, when the photoelectric sensor 23 on the base plate 16 detects the lithium ion battery, the control console 5 can enable the air cylinder 6 to be started, the output shaft of the air cylinder 6 drives the base plate 16 to descend, the rubber pad 22 on the pressing plate 21 is in contact with the lithium ion battery before pressing the lithium ion battery, the lithium ion battery is pressed, at the moment, the sliding rod 18 slides on the base plate 16, the top plate 19 is enabled to ascend relative to the base plate 16, and the distance between the top plate 19 and the base plate 16 is enabled to be increased, make the tensile length of spring 20 lengthen, simultaneously can taut roof 19 when spring 20 is tensile, make slide bar 18 top clamp plate 21, make clamp plate 21 tightly push down lithium ion battery, thereby carry out spacing fixed to lithium ion battery, simultaneously along with the decline of base plate 16 position, inside cylinder 17 can insert the lithium cell, thereby carry out the treatment of borduring to lithium ion battery, simultaneously at this time the end of borduring, the staff can start air extractor 11, make cylinder 17 behind the borduring, the inside lithium ion battery material that contains of cylinder 17 is inhaled the case 10 inside from gas-supply pipe 7, so that collect lithium ion battery material resource.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides a compound cathode material of multi-element doping high magnification lithium manganate is with device of punching a hole, includes workstation (1), its characterized in that, it is connected with reel (13) to rotate through the bearing between the relative both sides inner wall of workstation (1), and the winding has conveyer belt (2) between two reel (13), install spacing section of thick bamboo (3) that are equidistance structure distribution through the bolt on conveyer belt (2) top outer wall and the bottom outer wall, install motor (9) through the bolt on workstation (1) one side outer wall, and the one end of one of them reel (13) is fixed connection through the output of parallel key and motor (9), top shell (4) is installed through the bolt in workstation (1) top outer wall both sides, and top shell (4) top outer wall center department installs cylinder (6) through the bolt, base plate (16) are installed through the bolt to the output of cylinder (6), and the outer wall of the bottom of the base plate (16) is in threaded connection with needle cylinders (17) which are distributed in an equidistant structure, and the center of the outer wall of the bottom of the base plate (16) is provided with a photoelectric sensor (23) through a bolt.
2. The punching device for the multi-element-doped high-rate lithium manganate composite cathode material as claimed in claim 1, wherein the top shell (4) is provided with connecting pipes (14) at both sides of the top inner wall thereof by bolts, and the outer wall of the bottom of each connecting pipe (14) is provided with telescopic pipes (15) in an equidistant structure, the bottom ends of the telescopic pipes (15) are communicated with the needle cylinder (17), and the top inner wall of the top shell (4) is provided with door curtains (8) at positions close to both sides thereof by bolts.
3. The multi-element-doped high-rate lithium manganate composite positive electrode material as claimed in claim 2, wherein said top shell (4) is equipped with a material collecting box (10) on the outer wall of one side by bolts, and an air extractor (11) is installed on one side of the outer wall of the bottom of material collecting box (10) by bolts, and said connecting pipe (14) is inserted into one side of the outer wall of the top shell (4) and extends to the outside of said top shell (4), and the end of said gas pipe (7) far away from said connecting pipe (14) extends to the inside of said material collecting box (10).
4. The punching device for the multi-element-doped high-rate lithium manganate composite cathode material as claimed in claim 1, wherein a console (5) is mounted on the outer wall of one side of said top shell (4) by means of bolts, a cooler (12) communicated with said workbench (1) is mounted on the outer wall of one side of said workbench (1) by means of bolts, and said cooler (12) is electrically connected to said console (5) by means of wires.
5. The punching device for the multi-element-doped high-rate lithium manganate composite cathode material as claimed in claim 1, wherein the sliding rods (18) are inserted into two sides of the top outer wall of the base plate (16) and distributed in an equidistant structure, the top ends of the sliding rods (18) are welded with top plates (19), and springs (20) sleeved outside the sliding rods (18) are installed between the outer wall of the bottom of the top plates (19) and the outer wall of the top of the base plate (16) through bolts.
6. The punching device for the multi-element-doped high-rate lithium manganate composite cathode material as claimed in claim 5, wherein the outer wall of the bottom of said sliding bar (18) is provided with a pressing plate (21) by bolts, and the outer wall of the bottom of said pressing plate (21) is bonded with a rubber pad (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120915805.4U CN214797463U (en) | 2021-04-29 | 2021-04-29 | Punching device for multi-element doped high-rate lithium manganate composite positive electrode material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120915805.4U CN214797463U (en) | 2021-04-29 | 2021-04-29 | Punching device for multi-element doped high-rate lithium manganate composite positive electrode material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214797463U true CN214797463U (en) | 2021-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120915805.4U Active CN214797463U (en) | 2021-04-29 | 2021-04-29 | Punching device for multi-element doped high-rate lithium manganate composite positive electrode material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214797463U (en) |
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2021
- 2021-04-29 CN CN202120915805.4U patent/CN214797463U/en active Active
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