CN220195016U - Graphite pulverizer - Google Patents
Graphite pulverizer Download PDFInfo
- Publication number
- CN220195016U CN220195016U CN202321520603.5U CN202321520603U CN220195016U CN 220195016 U CN220195016 U CN 220195016U CN 202321520603 U CN202321520603 U CN 202321520603U CN 220195016 U CN220195016 U CN 220195016U
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- Prior art keywords
- grinding part
- grinding
- pulverizing
- kettle
- graphite
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 52
- 239000010439 graphite Substances 0.000 title claims abstract description 52
- 238000000227 grinding Methods 0.000 claims abstract description 189
- 238000010298 pulverizing process Methods 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 239000002245 particle Substances 0.000 abstract description 22
- 230000000694 effects Effects 0.000 description 11
- 230000000903 blocking effect Effects 0.000 description 5
- 239000008187 granular material Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
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- Crushing And Grinding (AREA)
Abstract
The utility model discloses a graphite pulverizer, which comprises a pulverizing kettle, a lower grinding part and an upper grinding mechanism, wherein the top end of the pulverizing kettle is provided with a cover body, the lower grinding part is arranged in the pulverizing kettle, the upper surface of the lower grinding part is provided with a concave arc surface, the lower grinding part is provided with a discharge hole penetrating up and down, the upper grinding mechanism comprises a driving shaft which is vertically and rotatably arranged on the cover body, the top end of the driving shaft is in transmission connection with a motor, the bottom end of the driving shaft extends into the pulverizing kettle and is provided with an upper grinding part, the upper grinding part is arranged above the lower grinding part, and the lower surface of the upper grinding part is provided with a lower convex arc surface matched with the upper surface of the lower grinding part, wherein the cover body can be adjusted up and down, or the lower grinding part can be adjusted up and down. The graphite pulverizer disclosed by the utility model is more convenient for graphite particles to enter the gap between the upper grinding part and the lower grinding part, so that the grinding efficiency can be improved.
Description
Technical Field
The utility model relates to graphite processing equipment, in particular to a graphite pulverizer.
Background
The graphite pulverizer is equipment for grinding graphite particles into graphite powder, the types of the graphite pulverizer are various, part of the graphite pulverizer comprises a pulverizing kettle, a cover body is arranged at the top end of the pulverizing kettle, a driving motor is arranged on the cover body, a driving shaft extending into the pulverizing kettle is vertically arranged on the driving motor, an upper grinding part is arranged at the bottom end of the driving shaft, a lower grinding part is arranged below the upper grinding part in the pulverizing kettle, the upper surface of the lower grinding part is provided with a concave arc surface, the lower surface of the upper grinding part is provided with a lower convex arc surface matched with the upper surface of the lower grinding part, and the driving shaft drives the upper grinding part to rotate.
According to the graphite pulverizer, the upper grinding part and the lower grinding part are arranged up and down, so that the grinding time can be longer, the upper surface of the lower grinding part is set to be a concave arc surface, the lower surface of the upper grinding part is set to be a convex arc surface, and the grinding area is larger, so that the grinding effect is better.
However, in the use process, it is found that since the upper grinding part and the lower grinding part are arranged up and down, and the gap between the lower surface of the upper grinding part and the upper surface of the lower grinding part is small, graphite particles are difficult to enter into the gap between the upper grinding part and the lower grinding part, and the grinding efficiency is reduced.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the graphite pulverizer, which is more convenient for graphite particles to enter a gap between the upper grinding part and the lower grinding part, and further can improve the grinding efficiency.
According to an embodiment of the present utility model, a graphite pulverizer includes:
the top end of the grinding kettle is provided with a cover body;
the lower grinding part is arranged in the grinding kettle, the upper surface of the lower grinding part is provided with a concave arc surface, and the lower grinding part is provided with a discharge hole penetrating up and down;
the upper grinding mechanism comprises a driving shaft which is vertical and rotationally arranged on the cover body, the top end of the driving shaft is in transmission connection with a motor, the bottom end of the driving shaft extends into the grinding kettle and is provided with an upper grinding part, the upper grinding part is positioned above the lower grinding part, and the lower surface of the upper grinding part is provided with a lower convex arc surface which is matched with the upper surface of the lower grinding part;
wherein, the lid can be adjusted from top to bottom, perhaps lower mill portion can be adjusted from top to bottom.
The graphite pulverizer provided by the embodiment of the utility model has at least the following beneficial effects:
the graphite particles are placed between the lower surface of the upper grinding part and the upper surface of the lower grinding part, the motor is started, the motor can control the driving shaft to rotate, the driving shaft can drive the upper grinding part to rotate, and the graphite particles can be ground into graphite powder through the cooperation between the lower surface of the upper grinding part and the upper surface of the lower grinding part. When the graphite particles need to be added, the cover body is moved upwards, the cover body drives the upper grinding part to move upwards, or the lower grinding part is moved downwards, so that the gap between the lower surface of the upper grinding part and the upper surface of the lower grinding part is increased, the graphite particles can conveniently enter the gap between the upper grinding part and the lower grinding part, and finally, the cover body is moved downwards or the lower grinding part is moved upwards, so that a new round of grinding work can be performed. In the utility model, the gap between the upper grinding part and the lower grinding part can be adjusted, so that the graphite particle raw material is convenient to add, and the grinding efficiency can be improved.
According to some embodiments of the utility model, a blocking column matched with the discharging hole is arranged on the bottom surface of the upper grinding part, the blocking column is gradually inserted into the discharging hole when the cover body moves downwards or the lower grinding part moves upwards, and the blocking column is gradually removed from the discharging hole when the cover body moves upwards or the lower grinding part moves downwards.
According to some embodiments of the utility model, the cover body is capable of being arranged at the top end of the grinding kettle in an up-and-down adjusting manner, and the edge of the lower grinding part is connected with the inner side wall of the grinding kettle.
According to some embodiments of the utility model, the edge of the lower grinding part is connected with the inner side wall of the grinding kettle in a sealing way, and a plurality of feeding holes are formed in the side wall of the grinding kettle along the circumferential direction and are positioned above the lower grinding part.
According to some embodiments of the utility model, the outer side wall of the grinding kettle is provided with a plurality of lifting cylinders along the circumferential direction, and the cover body is connected with the top ends of the lifting cylinders.
According to some embodiments of the utility model, the outer side wall of the grinding kettle is provided with a plurality of guide rods along the circumferential direction, the guide rods extend along the vertical direction, and the cover body is provided with guide holes for the guide rods to pass through.
According to some embodiments of the utility model, the edge of the cover body is provided with an annular side plate, and the inner side wall of the annular side plate is attached to the outer side wall of the top end of the grinding kettle.
According to some embodiments of the utility model, the grinding kettle is obliquely provided with a filter plate below the lower grinding part, and the side wall of the grinding kettle is provided with a yielding port for the lower end of the filter plate to pass through.
According to some embodiments of the utility model, the filter plate is provided with a vibrator.
According to some embodiments of the utility model, a plurality of first reinforcing rods are arranged between the top end of the upper grinding part and the driving shaft, and a plurality of second reinforcing rods are arranged between the bottom end of the lower grinding part and the inner side wall of the grinding kettle.
Additional aspects and advantages of the utility model 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 utility model.
Drawings
The utility model is further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a partial cross-sectional view of the present utility model;
FIG. 3 is a schematic illustration of the addition of graphite particles;
FIG. 4 is a schematic illustration of grinding graphite particles;
fig. 5 is a schematic diagram of the discharge.
Reference numerals:
a grinding kettle 100; a cover 101; a feed hole 102; a lift cylinder 103; a guide bar 104; an annular side plate 105; a filter plate 106; a vibrator 107; a feed connection 108;
a lower grinding part 200; a discharge hole 201; a second reinforcing bar 202;
a grinding mechanism 300; a drive shaft 301; a motor 302; an upper grinding part 303; plugging a column 304; a first reinforcing bar 305.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, a plurality refers to two or more. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
A graphite pulverizer according to an embodiment of the present utility model is described below with reference to fig. 1 to 5.
As shown in fig. 1 to 5, a graphite pulverizer according to an embodiment of the present utility model includes:
a grinding kettle 100, wherein a cover body 101 is arranged at the top end of the grinding kettle 100;
the lower grinding part 200 is arranged in the grinding kettle 100, the upper surface of the lower grinding part 200 is provided with a concave arc surface, and the lower grinding part 200 is provided with a discharge hole 201 penetrating up and down;
the upper grinding mechanism 300 comprises a driving shaft 301 which is vertically and rotatably arranged on the cover body 101, a motor 302 is connected to the top end of the driving shaft 301 in a transmission way, the bottom end of the driving shaft 301 extends into the grinding kettle 100 and is provided with an upper grinding part 303, the upper grinding part 303 is positioned above the lower grinding part 200, and the lower surface of the upper grinding part 303 is provided with a lower convex arc surface which is matched with the upper surface of the lower grinding part 200;
wherein, the cover 101 can be adjusted up and down, or the lower grinding part 200 can be adjusted up and down.
According to the graphite pulverizer of the present utility model, graphite particles are placed between the lower surface of the upper pulverizing part 303 and the upper surface of the lower pulverizing part 200, the motor 302 is started, the motor 302 can control the driving shaft 301 to rotate, the driving shaft 301 can drive the upper pulverizing part 303 to rotate, and the graphite particles can be pulverized into graphite powder by the cooperation between the lower surface of the upper pulverizing part 303 and the upper surface of the lower pulverizing part 200. When graphite particles need to be added, the cover 101 is moved upwards, the cover 101 drives the upper grinding part 303 to move upwards, or the lower grinding part 200 is moved downwards, so that the gap between the lower surface of the upper grinding part 303 and the upper surface of the lower grinding part 200 is increased, and the graphite particles can enter the gap between the upper grinding part 303 and the lower grinding part 200, and finally the cover 101 is moved downwards or the lower grinding part 200 is moved upwards, so that a new round of grinding work can be performed. In the present utility model, since the gap between the upper grinding part 303 and the lower grinding part 200 can be adjusted, it is convenient to add graphite particle raw materials, and thus grinding efficiency can be improved.
The driving shaft 301 may be directly coaxially connected to the output shaft of the motor 302, and the motor 302 may further directly control the rotation of the driving shaft 301, and a transmission structure such as a speed reducer may be disposed between the driving shaft 301 and the output shaft of the motor 302. The lower grinding part 200 is provided with a discharge hole 201 penetrating up and down, after grinding is completed, graphite powder can be discharged through the discharge hole 201 and finally discharged through a discharge pipe at the bottom end of the grinding kettle 100, and the discharge hole 201 can be vertically arranged at the middle position of the lower grinding part 200. In addition, in the grinding process, the cover body 101 can be slowly moved downwards or the lower grinding part 200 can be slowly moved upwards, so that the gap between the lower surface of the upper grinding part 303 and the upper surface of the lower grinding part 200 is gradually reduced, and the situation that graphite particles are gradually reduced can be just adapted, and the grinding effect is better.
In some embodiments of the present utility model, the bottom surface of the upper grinding portion 303 is provided with a plug 304 adapted to the discharge hole 201, when the cover 101 moves downward or the lower grinding portion 200 moves upward, the plug 304 is gradually inserted into the discharge hole 201, and when the cover 101 moves upward or the lower grinding portion 200 moves downward, the plug 304 is gradually moved out of the discharge hole 201.
Specifically, the plug 304 may be disposed vertically and coaxial with the discharge hole 201, and the diameter of the plug 304 may be equal to the aperture of the discharge hole 201. As shown in fig. 3, when graphite particles are added, the blocking column 304 partially extends into the discharge hole 201, so that the graphite particles can be prevented from being directly discharged from the discharge hole 201 to reduce the grinding effect. As shown in fig. 4, during the grinding process, the blocking column 304 partially or completely extends into the discharge hole 201, so as to avoid that the incompletely ground graphite particles are directly discharged from the discharge hole 201, thereby reducing the grinding effect. As shown in fig. 5, after finishing grinding, the plug 304 is moved out of the discharge hole 201 and is located above the discharge hole 201, so that the ground graphite powder is conveniently discharged from the discharge hole 201, and the grinding machine is ingenious in design and convenient to use.
It should be noted that a valve may be provided in the lower grinding portion 200, and the valve may control the opening and closing of the discharge hole 201 according to actual conditions.
In some embodiments of the present utility model, as shown in fig. 2, the cover 101 is provided at the top end of the grinding kettle 100 to be vertically adjustable, and the edge of the lower grinding part 200 is connected to the inner sidewall of the grinding kettle 100. The clearance between the lower surface of the upper grinding part 303 and the upper surface of the lower grinding part 200 can be adjusted by controlling the lifting of the cover body 101, the operation is simple and convenient, the time and the labor are saved, the lower grinding part 200 does not move, the connection strength with the grinding kettle 100 is higher, and the grinding kettle can bear larger force during grinding, so that the grinding effect is better, and the service life is longer. The cover 101 may not be moved, but the lower grinding part 200 may be moved up and down.
In some embodiments of the present utility model, as shown in fig. 1 and 2, the edge of the lower grinding part 200 is hermetically connected to the inner sidewall of the grinding kettle 100, and the sidewall of the grinding kettle 100 is provided with a plurality of feed holes 102 along the circumferential direction, and the feed holes 102 are located above the lower grinding part 200. The outer end of feed port 102 can be equipped with feed joint 108, and all feed joints 108 and feed system intercommunication, and feed system can carry graphite granule to grinding cauldron 100 in from the multiple direction of grinding cauldron 100 week side through feed joint 108 and feed port 102, and then from the multiple direction at lower mill portion 200 border enter into the clearance between the lower surface of last mill portion 303 and the upper surface of lower mill portion 200, and feed efficiency is higher, and the feeding is more even, and then grinding efficiency is higher, and the grinding effect is better.
In some embodiments of the present utility model, as shown in fig. 1 and 2, the outer sidewall of the grinding still 100 is provided with a plurality of lift cylinders 103 in the circumferential direction, and the cover 101 is connected to the top ends of the lift cylinders 103. Specifically, the lifting cylinder 103 may be vertically disposed, the bottom end of the lifting cylinder 103 is mounted on the outer side wall of the grinding kettle 100 through a mounting seat, and a connection portion may be disposed on the peripheral side of the cover 101 and connected to the top end of the lifting cylinder 103. The lifting oil cylinder 103 is started, so that the cover body 101 can be controlled to lift, the structure is simple, the operation is convenient, a plurality of lifting oil cylinders 103 are arranged, the lifting effect is better, the cover body 101 is supported more stably, and side turning of the cover body 101 can be avoided.
It should be noted that, the cover 101 may be controlled to be lifted by other manners, for example, the lifting of the cover 101 may be controlled by a motor screw, specifically, the outer side wall of the grinding kettle 100 is provided with a plurality of screws vertically and rotationally along the circumferential direction, the screws are in threaded connection with the cover 101, the screw is connected with a control motor in a transmission manner, the control motor is started, the control motor can control the screw to rotate, and the screw can drive the cover 101 to lift.
In some embodiments of the present utility model, as shown in fig. 1, the outer sidewall of the grinding still 100 is provided with a plurality of guide rods 104 in the circumferential direction, the guide rods extend in the vertical direction, and the cover 101 is provided with guide holes through which the guide rods 104 pass. Through the cooperation of guide bar 104 and guiding hole, not only can lead lid 101 for lid 101 removes more accurately, can produce the moment of torsion effort to lid 101 when last grinding portion 303 rotates moreover, if do not set up guide bar 104 and guiding hole, the moment of torsion effort can directly act on lift cylinder 103, and then leads to lift cylinder 103 to damage, and in this embodiment, set up guide bar 104 and guiding hole, can reduce the moment of torsion effort that lift cylinder 103 received, and then can avoid lift cylinder 103 to suffer damage.
In some embodiments of the present utility model, as shown in fig. 2, an annular side plate 105 is disposed at the edge of the cover 101, and the inner side wall of the annular side plate 105 is attached to the outer side wall of the top end of the grinding kettle 100. Even if the cover body 101 is lifted to any position, the inner side wall of the annular side plate 105 is attached to the outer side wall of the top end of the grinding kettle 100, so that the sealing effect is good, and further graphite powder can be prevented from being discharged from between the cover body 101 and the grinding kettle 100. In addition, through the cooperation between the inside wall of annular curb plate 105 and the lateral wall of grinding cauldron 100, can also play the guide effect for lid 101 goes up and down to remove more accurate.
In some embodiments of the present utility model, as shown in fig. 2, the grinding still 100 is obliquely provided with a filter plate 106 below the lower grinding part 200, and a sidewall of the grinding still 100 is provided with a relief hole through which a lower end of the filter plate 106 passes. Specifically, filter 106 is equipped with the filtration pore, and the filtration pore allows graphite powder to pass, but restricts the graphite granule of certain size and pass, and filter 106 incline direction's bottom can be connected with storage device, and filter 106 is used for filtering and grinds incomplete graphite granule, and then makes graphite powder finished product quality higher, and filter 106 slope setting can make graphite granule landing on it collect the storage in to storage device.
It should be noted that, two sides of the filter plate 106 may be provided with a baffle for preventing graphite particles from sliding off from two sides of the filter plate 106. The baffle is stretched out the mouth of stepping down equally, and the top of the part that two baffles stretched out the mouth of stepping down can be equipped with the roof, and then can avoid graphite powder to stretch out the top of the part of stepping down the mouth from filter 106 and spill. It will be appreciated that the portion of the filter plate 106 extending beyond the relief port is not provided with filter apertures.
In some embodiments of the utility model, as shown in fig. 2, the filter board 106 is provided with a vibrator 107. Set up vibrator 107, vibrator 107 can make filter 106 produce the vibration to can improve the filter effect of filter 106, make graphite particles's landing more quick moreover, the screening effect is better.
In some embodiments of the present utility model, as shown in fig. 2, a plurality of first reinforcing rods 305 are provided between the top end of the upper grinding part 303 and the driving shaft 301, and a plurality of second reinforcing rods 202 are provided between the bottom end of the lower grinding part 200 and the inner sidewall of the grinding kettle 100. The first reinforcing rod 305 and the second reinforcing rod 202 are arranged, so that the structural strength can be enhanced, the connection between the upper grinding part 303 and the driving shaft 301 is more stable, and the connection between the lower grinding part 200 and the grinding kettle 100 is more stable.
The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.
Claims (10)
1. A graphite pulverizer, comprising:
the top end of the grinding kettle is provided with a cover body;
the lower grinding part is arranged in the grinding kettle, the upper surface of the lower grinding part is provided with a concave arc surface, and the lower grinding part is provided with a discharge hole penetrating up and down;
the upper grinding mechanism comprises a driving shaft which is vertical and rotationally arranged on the cover body, the top end of the driving shaft is in transmission connection with a motor, the bottom end of the driving shaft extends into the grinding kettle and is provided with an upper grinding part, the upper grinding part is positioned above the lower grinding part, and the lower surface of the upper grinding part is provided with a lower convex arc surface which is matched with the upper surface of the lower grinding part;
wherein, the lid can be adjusted from top to bottom, perhaps lower mill portion can be adjusted from top to bottom.
2. The graphite pulverizer of claim 1, wherein the bottom surface of the upper grinding portion is provided with a plug post adapted to the discharge hole, the plug post is gradually inserted into the discharge hole when the cover moves downward or the lower grinding portion moves upward, and the plug post is gradually removed from the discharge hole when the cover moves upward or the lower grinding portion moves downward.
3. The graphite pulverizer of claim 1 or 2, wherein the cover body is capable of being arranged at the top end of the pulverizing kettle in an up-and-down adjusting manner, and the edge of the lower grinding part is connected with the inner side wall of the pulverizing kettle.
4. A graphite pulverizer as in claim 3 wherein the rim of the lower pulverizing section is sealingly connected to the inner sidewall of the pulverizing tank, the sidewall of the pulverizing tank being circumferentially provided with a plurality of feed holes, the feed holes being located above the lower pulverizing section.
5. A graphite pulverizer as in claim 3 wherein the outer sidewall of the pulverizing tank is circumferentially provided with a plurality of lift cylinders, and the cover is attached to the top end of the lift cylinders.
6. The graphite pulverizer of claim 5, wherein the outer sidewall of the pulverizing tank is provided with a plurality of guide bars in the circumferential direction, the guide bars extend in the vertical direction, and the cover is provided with guide holes through which the guide bars pass.
7. A graphite pulverizer as in claim 3 wherein the cover is provided with annular side panels at its edges, the inner side walls of the annular side panels being attached to the outer side walls of the pulverizing tank top.
8. The graphite pulverizer of claim 1 or 2, wherein the pulverizing kettle is obliquely provided with a filter plate below the lower grinding part, and a sidewall of the pulverizing kettle is provided with a relief opening through which the lower end of the filter plate passes.
9. The graphite pulverizer of claim 8, wherein the filter plate is provided with a vibrator.
10. A graphite pulverizer as in claim 3, wherein a plurality of first reinforcing bars are provided between the top end of the upper pulverizing section and the drive shaft, and a plurality of second reinforcing bars are provided between the bottom end of the lower pulverizing section and the inner side wall of the pulverizing tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321520603.5U CN220195016U (en) | 2023-06-14 | 2023-06-14 | Graphite pulverizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321520603.5U CN220195016U (en) | 2023-06-14 | 2023-06-14 | Graphite pulverizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220195016U true CN220195016U (en) | 2023-12-19 |
Family
ID=89152664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321520603.5U Active CN220195016U (en) | 2023-06-14 | 2023-06-14 | Graphite pulverizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220195016U (en) |
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2023
- 2023-06-14 CN CN202321520603.5U patent/CN220195016U/en active Active
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