CN219352359U - Fertilizing vehicle for forestry - Google Patents
Fertilizing vehicle for forestry Download PDFInfo
- Publication number
- CN219352359U CN219352359U CN202320160507.8U CN202320160507U CN219352359U CN 219352359 U CN219352359 U CN 219352359U CN 202320160507 U CN202320160507 U CN 202320160507U CN 219352359 U CN219352359 U CN 219352359U
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- fertilizer
- fixedly connected
- blanking
- electric telescopic
- box
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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
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
Abstract
The utility model discloses a fertilizer truck for forestry, which relates to the technical field of forestry fertilization and comprises a truck frame, wherein the top of the truck frame is fixedly connected with a fertilizer box, a first pushing mechanism is arranged in the fertilizer box, a first blanking opening is formed in one side of the fertilizer box, a blanking box is fixedly connected with one side of the fertilizer box, an induction blanking mechanism is arranged in the blanking box, a second blanking opening is formed in one side of the blanking box, a blanking hopper is fixedly connected with one side of the blanking box, the second blanking opening is matched with the blanking hopper, a drilling mechanism is arranged in the truck frame, a first sliding mechanism is arranged in the truck frame, and a feeding hopper is arranged at the top of the fertilizer box, and the fertilizer truck has the beneficial effects that: the sensing blanking mechanism can control the blanking amount of the fertilizer, so that the fertilizing amount of different trees is conveniently controlled, the fertilizing efficiency is greatly improved, and the working intensity of a user is reduced.
Description
Technical Field
The utility model relates to the technical field of forestry fertilization, in particular to a fertilization vehicle for forestry.
Background
Fertilizing refers to agricultural technical measures of applying fertilizers to soil or spraying the fertilizers on plants, providing nutrients required by the plants, and maintaining and improving the soil fertility. The main purpose of fertilization is to increase crop yield, improve crop quality, fertilize soil fertility and increase economic benefits, so reasonable and scientific fertilization is one of the main means for guaranteeing grain safety and maintaining agricultural sustainable development.
At present, in the planting process of forestry trees, the trees are generally required to be fertilized, most of the existing fertilizing devices are simple in structure, the quantity of fertilizing the trees cannot be accurately controlled, the fertilizing quantities required by different kinds of trees are different, the follow-up growth condition of the trees is seriously influenced by the fertilizing quantity of the trees, and therefore the fertilizing vehicle for the forestry is provided.
Disclosure of Invention
Aiming at the defects that most of fertilizing devices in the prior art are simple in structure and cannot accurately control the fertilizing amount of trees, the utility model provides a fertilizing vehicle for forestry, and solves the problems in the background art.
In order to achieve the above purpose, the utility model is realized by the following technical scheme: the utility model provides a fertilizer distributor for forestry, includes the frame, the top fixedly connected with fertilizer box of frame, the inside of fertilizer box is provided with first pushing mechanism, first feed opening has been seted up to one side of fertilizer box, one side fixedly connected with unloading case of fertilizer box, the inside of unloading case is provided with response unloading mechanism, the second feed opening has been seted up to one side of unloading case, one side fixedly connected with unloading hopper of unloading case, second feed opening cooperates with unloading hopper, the inside of frame is provided with drilling mechanism, the inside of frame is provided with first slide mechanism, the top of fertilizer case is provided with into the hopper.
Preferably, the first pushing mechanism comprises a first electric telescopic rod, the first electric telescopic rod is fixedly connected to the inside of the fertilizer box, the output end of the fertilizer box is fixedly connected with a pushing plate, and fertilizer can be pushed from the inside of the fertilizer box through the first pushing mechanism, so that the fertilizer is conveniently fed, and when the fertilizer feeding mechanism is used, the first electric telescopic rod is started to extend out, so that the first electric telescopic rod drives the pushing plate to push the fertilizer of the fertilizer box.
Preferably, the response unloading mechanism includes two third electric telescopic handle, first mounting panel, the fixed connection of third electric telescopic handle is in the inside of unloading case, first mounting panel rotates the inside of connecting in the unloading case, first sliding tray has been seted up to the inside of first mounting panel, the inside sliding connection of first sliding tray has first sliding block, the inside rotation of first sliding block is connected with the connecting rod, the outside of the connecting rod other end and the output rotation of third electric telescopic handle are connected, the top of first mounting panel is provided with gravity inductor, gravity inductor's top is provided with the barrier plate, can control the unloading volume of fertilizer through response unloading mechanism to the fertilizer volume of different trees, during the use, earlier through the controller of unloading case outside setting, the gravity induction of gravity inductor sets up, then makes fertilizer from the inside of first unloading mouth unloading to the unloading case, when the inside fertilizer of unloading case reaches the weight that sets up, seals first unloading mouth, then starts two third electric telescopic handle and carries out shrink, thereby drive the inside that drives the inside that drives the connecting rod and rotate to the inside that drives the unloading case at the inside of first unloading case, and the inside that drives the inside that the expansion joint is rotated to the inside the connecting rod to the inside the unloading case, and the inside that drives the first unloading case at the first unloading case.
Preferably, one side fixedly connected with second electric telescopic handle of fertilizer case, the output fixedly connected with lifter plate of second electric telescopic handle, the lifter plate is mutually supported with first feed opening, through the mutually supporting of second electric telescopic handle, lifter plate, first feed opening and response feed opening mechanism, when need carry out the unloading, starts the second electric telescopic handle and contracts, drives the lifter plate and rises to remove the restriction to first feed opening, thereby carry out the unloading, when reaching the weight that response feed opening set up, can start the second electric telescopic handle again and stretch out, drive the lifter plate decline and seal first feed opening.
Preferably, the drilling mechanism comprises a fourth electric telescopic rod, the fourth electric telescopic rod is fixedly connected to one side of the frame, the output end of the fourth electric telescopic rod is fixedly connected with a mounting block, the bottom of the mounting block is rotationally connected with a drill bit, a first servo motor is fixedly arranged in the mounting block, the output end of the first servo motor is fixedly connected with the drill bit, drilling can be conducted according to different drilling depths of requirements when the drilling mechanism is used for conducting fertilization, follow-up fertilization is convenient, when the drilling mechanism is used, the fourth electric telescopic rod is started to extend out, so that the mounting block drives the first servo motor to move downwards, and meanwhile, the mounting block is started to drive the drill bit to rotate, and therefore drilling is conducted.
Preferably, the first sliding mechanism comprises a second sliding groove, the second sliding groove is formed in the frame, a bidirectional screw rod is connected to the second sliding groove in a rotating mode, two second sliding blocks are connected to the second sliding groove in a sliding mode, the bidirectional screw rod penetrates through the two second sliding blocks and is in threaded connection with the two second sliding blocks, a second servo motor is fixedly arranged in the frame, an output end of the second servo motor is fixedly connected with the bidirectional screw rod, the second servo motor can be matched with a discharging pipe and a water outlet pipe after drilling is completed, fertilizer is discharged into the drilling hole, a certain amount of water is injected into the drilling hole to enable the fertilizer to be easily absorbed by trees, after drilling is completed, the drilling mechanism is lifted firstly, then the second servo motor is started to enable the bidirectional screw rod to drive the two second sliding blocks to slide in the second sliding groove, and the discharging pipe and the water outlet pipe are respectively driven to move to discharge the inside of the drilling hole.
Preferably, the top fixedly connected with water tank of frame, one side fixedly connected with outlet pipe of water tank, the other end of outlet pipe extends to one of them second sliding block and contacts, conveniently carries out the water injection to the drilling inside through the mutually supporting of water tank, outlet pipe and second sliding block, and during the use, the force (forcing) pump in the outlet pipe outside starts earlier, carries the inside water of water tank through the outlet pipe, pours into to the drilling inside.
Preferably, the bottom fixedly connected with unloading pipe of unloading hopper, the other end of unloading pipe contacts with another second sliding block, through the mutual cooperation of unloading hopper, unloading pipe and second sliding block, conveniently carries out the unloading to the drilling inside after the drilling is accomplished.
The utility model provides a fertilizer truck for forestry, which has the following beneficial effects:
1. this fertilizer truck for forestry can control the unloading volume of fertilizer through response unloading mechanism to the fertilizer volume of different trees is controlled to convenient control, during the use, earlier through the controller that the unloading case outside set up, gravity induction to the gravity inductor sets up, then make fertilizer follow first feed opening unloading to the inside of unloading case, when the inside fertilizer of unloading case reaches the weight of setting, seal first feed opening, then start two third electric telescopic handle and shrink, thereby drive the connecting rod and rotate, make the connecting rod drive first sliding block slide in the inside of first sliding tray under rotation spacing, make first mounting panel rotate in the inside of unloading case, then with the inside fertilizer of unloading to unloading case through the inside of second feed opening unloading to the unloading case, the stop block that the inside of unloading case set up, can prevent that first mounting panel rotation angle is too big, make fertilizer card in the gap, greatly improved the efficiency of fertilization, user's working strength has been alleviateed.
2. This fertilizer distributor for forestry can accomplish the back through first slide mechanism, mutually support with unloading pipe and outlet pipe, with fertilizer unloading to inside the drilling, reinjection of water of a certain amount makes fertilizer absorbed by trees easily, after accomplishing the drilling, raise drilling mechanism earlier, then start second servo motor and make two second sliding blocks drive two second sliding blocks slide in the inside of second sliding tray, drive unloading pipe and outlet pipe respectively and remove the inside to carry out the unloading to the drilling, greatly improved the speed of fertilization unloading, can carry out the water injection to inside the drilling simultaneously, thereby accelerate the absorption of trees to fertilizer, it is more convenient to compare general fertilizer distributor for forestry use on the market.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of a gravity sensing mechanism according to the present utility model;
FIG. 3 is a cross-sectional view of a first pushing mechanism of the present utility model;
fig. 4 is a schematic view of a first sliding mechanism according to the present utility model.
1, a frame; 2. a water tank; 3. a fertilizer box; 4. feeding into a hopper; 5. a water outlet pipe; 6. a first electric telescopic rod; 7. a pushing plate; 8. a first blanking port; 9. a lifting plate; 10. a lifting plate; 11. discharging boxes; 12. discharging a hopper; 13. a second feed opening; 14. a blocking plate; 15. a gravity sensor; 16. a first mounting plate; 17. a first sliding groove; 18. a first slider; 19. a connecting rod; 20. a third electric telescopic rod; 21. a fourth electric telescopic rod; 22. a mounting block; 23. a first servo motor; 24. a drill bit; 25. a second sliding groove; 26. a second slider; 27. a two-way screw rod; 28. a second servo motor; 29. and (5) blanking pipes.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
Referring to fig. 1 to 4, the present utility model provides a technical solution: the utility model provides a fertilizer car for forestry, including frame 1, the top fixedly connected with fertilizer box 3 of frame 1, the inside of fertilizer box 3 is provided with first pushing mechanism, first feed opening 8 has been seted up to one side of fertilizer box 3, one side fixedly connected with unloading case 11 of fertilizer box 3, the inside of unloading case 11 is provided with response unloading mechanism, second feed opening 13 has been seted up to one side of unloading case 11, one side fixedly connected with unloading hopper 12 of unloading case 11, second feed opening 13 cooperates with unloading hopper 12, the inside of frame 1 is provided with drilling mechanism, the inside of frame 1 is provided with first sliding mechanism, the top of fertilizer box 3 is provided with into hopper 4;
the first pushing mechanism comprises a first electric telescopic rod 6, the first electric telescopic rod 6 is fixedly connected to the inside of the fertilizer box 3, the output end of the fertilizer box 3 is fixedly connected with a pushing plate 7, and fertilizer can be pushed from the inside of the fertilizer box 3 through the first pushing mechanism, so that the fertilizer is conveniently discharged, and when the fertilizer pushing mechanism is used, the first electric telescopic rod 6 is started to extend out firstly, so that the first electric telescopic rod 6 drives the pushing plate 7 to push the fertilizer of the fertilizer box 3;
the induction blanking mechanism comprises two third electric telescopic rods 20 and a first mounting plate 16, wherein the third electric telescopic rods 20 are fixedly connected to the inside of a blanking box 11, the first mounting plate 16 is rotationally connected to the inside of the blanking box 11, a first sliding groove 17 is formed in the inside of the first mounting plate 16, a first sliding block 18 is slidingly connected to the inside of the first sliding groove 17, a connecting rod 19 is rotationally connected to the inside of the first sliding block 18, the outer side of the other end of the connecting rod 19 is rotationally connected with the output end of the third electric telescopic rods 20, a gravity sensor 15 is arranged at the top of the first mounting plate 16, a gravity sensor 14 is arranged at the top of the gravity sensor 15, the blanking amount of fertilizers can be controlled through the induction blanking mechanism, so that the fertilizing amount of different trees is conveniently controlled, when the induction blanking mechanism is used, firstly, the fertilizers are blanked from a first blanking opening 8 to the inside of the blanking box 11 through a controller arranged on the outer side of the blanking box 11, when the fertilizers in the blanking box 11 reach set weight, the first blanking opening 8 is closed, then two electric telescopic rods 20 are started to be rotationally connected with the output end of the third electric telescopic rods 20, the first blanking box 16 is rotationally blocked by the first sliding block 11, the first sliding block 19 is rotationally blocked in the inside the blanking box 11, and the blanking box 11 is rotationally blocked by the first sliding block 11, and the first sliding rod is rotationally blocked inside the blanking box 11, and the blanking plate is rotationally blocked by the first sliding rod 19, and the first sliding rod is rotationally blocked inside the blanking rod is rotationally blocked by the first blanking rod, and the first blanking rod is rotationally;
the second electric telescopic rod 10 is fixedly connected to one side of the fertilizer box 3, the lifting plate 9 is fixedly connected to the output end of the second electric telescopic rod 10, the lifting plate 9 is matched with the first blanking opening 8, the mounting block 22 is fixedly connected to the output end of the fourth electric telescopic rod 21, the drill bit 24 is rotatably connected to the bottom of the mounting block 22, the first servo motor 23 is fixedly arranged in the mounting block 22, the output end of the first servo motor 23 is fixedly connected with the drill bit 24, so that the limitation on the first blanking opening 8 is relieved, the blanking is performed, the second electric telescopic rod 10 is started to extend again when the weight set by the induction blanking mechanism is reached, the lifting plate 9 is driven to descend to seal the first blanking opening 8, the drilling mechanism comprises the fourth electric telescopic rod 21, the fourth electric telescopic rod 21 is fixedly connected to one side of the frame 1, the first servo motor 23 is fixedly arranged in the drilling block 22, the output end of the first servo motor 23 is fixedly connected with the drill bit 24, the drill bit 22 can be conveniently and rotatably mounted in the drilling block 22 according to different depths when the drill bit 22 is reached, and the drill bit is conveniently started to rotate and the drill bit 24 is driven to extend downwards when the drill bit 22 is required to be mounted;
the first sliding mechanism comprises a second sliding groove 25, the second sliding groove 25 is arranged in the frame 1, a bidirectional screw rod 27 is rotatably connected in the second sliding groove 25, two second sliding blocks 26 are slidably connected in the second sliding groove 25, the bidirectional screw rod 27 penetrates through the two second sliding blocks 26 and is in threaded connection with the two second sliding blocks, a second servo motor 28 is fixedly arranged in the frame 1, an output end of the second servo motor 28 is fixedly connected with the bidirectional screw rod 27, after drilling is finished through the first sliding mechanism, the output end of the second servo motor 28 can be matched with the blanking pipe 29 and the water outlet pipe 5, the fertilizer is blanked into the drilling hole, a certain amount of water is injected to enable the fertilizer to be easily absorbed by trees, after drilling is finished, the drilling mechanism is lifted, and then the second servo motor 28 is started to enable the bidirectional screw rod 27 to drive the two second sliding blocks 26 to slide in the second sliding groove 25, and the blanking pipe 29 and the water outlet pipe 5 are respectively driven to move to perform blanking on the inside of the drilling hole;
the top fixedly connected with water tank 2 of frame 1, one side fixedly connected with outlet pipe 5 of water tank 2, the other end of outlet pipe 5 extends to one of them second sliding block 26 and contacts, conveniently carry out the water injection to the drilling inside through the mutually supporting of water tank 2, outlet pipe 5 and second sliding block 26, during the use, start the force (forcing) pump in outlet pipe 5 outside earlier, carry water tank 2's inside water through outlet pipe 5, pour into to the drilling inside, the bottom fixedly connected with unloading pipe 29 of unloading hopper 12, unloading pipe 29's the other end contacts with another second sliding block 26, through the mutually supporting of unloading hopper 12, unloading pipe 29 and second sliding block 26, conveniently carry out the unloading to the drilling inside after the drilling is accomplished.
In summary, when the fertilizer truck for forestry is used, a user firstly performs setting by gravity induction of the gravity sensor 15 through the controller arranged on the outer side of the blanking box 11, then blanking the fertilizer into the fertilizer box 3 through the feeding hopper 4, then starting the fourth electric telescopic rod 21 to extend, so that the mounting block 22 drives the first servo motor 23 to move downwards, simultaneously starting the mounting block 22 to drive the drill bit 24 to rotate, thereby drilling, controlling the extending length of the fourth electric telescopic rod 21 according to the required drilling depth, then lifting the drilling mechanism, then starting the second servo motor 28 to drive the two second sliding blocks 26 to slide in the second sliding grooves 25 by the bidirectional screw rod 27, respectively driving the blanking pipe 29 and the water outlet pipe 5 to move, simultaneously starting the first electric telescopic rod 6 to extend, driving the pushing plate 7 to push the fertilizer of the fertilizer box 3 by the first electric telescopic rod 6, then the second electric telescopic rods 10 are started to shrink, the lifting plate 9 is driven to lift, the limitation on the first blanking opening 8 is relieved, blanking is carried out, the first blanking opening 8 is closed when the fertilizer in the blanking box 11 reaches the set weight through the gravity induction of the gravity sensor 15, then the two third electric telescopic rods 20 are started to shrink, the connecting rods 19 are driven to rotate, the connecting rods 19 drive the first sliding blocks 18 to slide in the first sliding grooves 17 under the rotation limitation, the first mounting plates 16 rotate in the blanking box 11, then the fertilizer which is blanked into the blanking box 11 is blanked into the blanking hopper 12 through the second blanking opening 13, the blocking blocks arranged in the blanking box 11 can prevent the first mounting plates 16 from rotating too much, make fertilizer card in the gap, then through the cooperation of unloading hopper 12 and unloading pipe 29 with the fertilizer unloading to the drilling inside, then start the force (forcing) pump in outlet pipe 5 outside, carry the inside water of water tank 2 through outlet pipe 5, pour into to the drilling inside, can add the solution of fertilizer and make trees can absorb better.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (8)
1. The utility model provides a fertilizer distributor car for forestry, includes frame (1), its characterized in that: the utility model discloses a feed hopper (4) of frame (1), including frame (1), top fixedly connected with fertilizer case (3), the inside of fertilizer case (3) is provided with first pushing mechanism, first feed opening (8) have been seted up to one side of fertilizer case (3), one side fixedly connected with feed box (11) of fertilizer case (3), the inside of feed box (11) is provided with response feed mechanism, second feed opening (13) have been seted up to one side of feed box (11), one side fixedly connected with feed hopper (12) of feed box (11), second feed opening (13) and feed hopper (12) mutually support, the inside of frame (1) is provided with drilling mechanism, the inside of frame (1) is provided with first sliding mechanism, the top of fertilizer case (3) is provided with into hopper (4).
2. A fertilizer truck for forestry as set forth in claim 1, wherein: the first pushing mechanism comprises a first electric telescopic rod (6), the first electric telescopic rod (6) is fixedly connected to the inside of the fertilizer box (3), and the output end of the fertilizer box (3) is fixedly connected with a pushing plate (7).
3. A fertilizer truck for forestry as set forth in claim 1, wherein: the induction blanking mechanism comprises two third electric telescopic rods (20) and a first mounting plate (16), wherein the third electric telescopic rods (20) are fixedly connected to the inside of a blanking box (11), the first mounting plate (16) is rotationally connected to the inside of the blanking box (11), a first sliding groove (17) is formed in the first mounting plate (16), a first sliding block (18) is slidingly connected to the inside of the first sliding groove (17), a connecting rod (19) is rotationally connected to the inside of the first sliding block (18), the outer side of the other end of the connecting rod (19) is rotationally connected with the output end of the third electric telescopic rods (20), a gravity sensor (15) is arranged at the top of the first mounting plate (16), and a blocking plate (14) is arranged at the top of the gravity sensor (15).
4. A fertilizer truck for forestry as set forth in claim 1, wherein: one side fixedly connected with second electric telescopic handle (10) of fertilizer case (3), the output fixedly connected with lifter plate (9) of second electric telescopic handle (10), lifter plate (9) and first feed opening (8) mutually support.
5. A fertilizer truck for forestry as set forth in claim 1, wherein: the drilling mechanism comprises a fourth electric telescopic rod (21), the fourth electric telescopic rod (21) is fixedly connected to one side of the frame (1), the output end of the fourth electric telescopic rod (21) is fixedly connected with a mounting block (22), the bottom of the mounting block (22) is rotationally connected with a drill bit (24), a first servo motor (23) is fixedly arranged in the mounting block (22), and the output end of the first servo motor (23) is fixedly connected with the drill bit (24).
6. A fertilizer truck for forestry as set forth in claim 1, wherein: the first sliding mechanism comprises a second sliding groove (25), the second sliding groove (25) is formed in the frame (1), a bidirectional screw rod (27) is connected to the second sliding groove (25) in a rotating mode, two second sliding blocks (26) are connected to the second sliding groove (25) in a sliding mode, the bidirectional screw rod (27) penetrates through the two second sliding blocks (26) and is in threaded connection with the two second sliding blocks, a second servo motor (28) is fixedly mounted in the frame (1), and the output end of the second servo motor (28) is fixedly connected with the bidirectional screw rod (27).
7. A fertilizer truck for forestry as set forth in claim 1, wherein: the top fixedly connected with water tank (2) of frame (1), one side fixedly connected with outlet pipe (5) of water tank (2), the other end of outlet pipe (5) extends to one of them second sliding block (26) and contacts.
8. A fertilizer truck for forestry as set forth in claim 1, wherein: the bottom of the blanking hopper (12) is fixedly connected with a blanking pipe (29), and the other end of the blanking pipe (29) is contacted with another second sliding block (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320160507.8U CN219352359U (en) | 2023-02-09 | 2023-02-09 | Fertilizing vehicle for forestry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320160507.8U CN219352359U (en) | 2023-02-09 | 2023-02-09 | Fertilizing vehicle for forestry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219352359U true CN219352359U (en) | 2023-07-18 |
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ID=87138245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320160507.8U Active CN219352359U (en) | 2023-02-09 | 2023-02-09 | Fertilizing vehicle for forestry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219352359U (en) |
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2023
- 2023-02-09 CN CN202320160507.8U patent/CN219352359U/en active Active
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