CN219255204U - Semi-automatic unloader of numerically control grinder - Google Patents
Semi-automatic unloader of numerically control grinder Download PDFInfo
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- CN219255204U CN219255204U CN202222735205.7U CN202222735205U CN219255204U CN 219255204 U CN219255204 U CN 219255204U CN 202222735205 U CN202222735205 U CN 202222735205U CN 219255204 U CN219255204 U CN 219255204U
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- material conveying
- machine tool
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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
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Abstract
The utility model provides a semi-automatic blanking device of a numerically controlled grinder, which comprises a workbench arranged in the machine tool, a mechanical arm arranged in the machine tool and arranged on the workbench, and a grabbing product sent into a grinding processing area; the material guiding rail is arranged in the machine tool and is connected with the workbench through the bottom base, a material pushing unit is arranged in the material guiding rail, and the material pushing unit enables products to enter the material taking area of the mechanical arm; the steering adjusting cavity is arranged above the material guiding track in the machine tool, the bottom outlet is connected to the material guiding track in the direction away from the mechanical arm, an annular track is arranged in the steering adjusting cavity, and products in the material receiving guide rail are transmitted into the material guiding track; the material conveying guide rail is arranged on the machine tool in a penetrating way and is obliquely arranged, a material inlet at the top of the material conveying guide rail is arranged on the outer side of the machine tool, and a material outlet at the bottom of the material conveying guide rail is arranged on the inner side of the machine tool and is connected with the material inlet of the annular rail; the utility model adopts the mechanical arm, the material guide rail, the steering adjusting cavity, the material conveying guide rail, the material conveying limiting device and the automatic material conveying mechanism to realize the purpose of semi-automatic blanking of the machine tool, so that one person can manage a plurality of machines.
Description
Technical Field
The utility model relates to the field of semi-automatic machining of bearings, in particular to a blanking process of a numerical control grinding machine, and particularly relates to a semi-automatic blanking device of the numerical control grinding machine.
Background
Because the blanking track of the existing numerical control grinding machine is shorter, operators are required to perform blanking one by one according to the machining progress, and the efficiency of one or two machine tools can only be lowered.
And the existing machine tool such as an automatic grinding machine feed port with the model of 3mk1310 is arranged on the front face of the machine tool corresponding to the operation post of an operator, and if the use of the operator is influenced by the original feed channel at the original opening, the potential safety hazard exists.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present utility model aims to provide a semi-automatic blanking device of a numerically controlled grinder, which is used for solving the difficulties of the prior art.
To achieve the above and other related objects, the present utility model provides a semiautomatic blanking device of a numerically controlled grinder, including:
a machine tool 1, wherein a workbench 2 is arranged inside the machine tool 1;
the mechanical arm 3 is arranged in the machine tool 1 and is arranged on the workbench 2, and products in the grabbing guide rail 4 are sent into the grinding processing area 12;
the material guiding rail 4 is arranged at the left side of the mechanical arm 3 in the machine tool 1 and is connected with the workbench 2 through the bottom base 11, a material pushing unit 5 is arranged in the material guiding rail 4, and the material pushing unit 5 pushes a product falling into the material guiding rail 4 to enter the material taking area 6 of the mechanical arm;
the steering adjusting cavity 7 is arranged in the machine tool 1 and is positioned above the material guide rail 4, the bottom outlet is connected to the direction that the material guide rail 4 is far away from the mechanical arm 3, an annular rail 702 is arranged in the steering adjusting cavity 7, the discharge hole at the bottom of the annular rail 702 is arranged right above the material guide rail 4 in parallel, the top material inlet is connected with the discharge hole at the bottom of the upper material conveying guide rail 8, and products in the material conveying guide rail 8 are received to be conveyed into the material guide rail 4;
the material conveying guide rail 8 is arranged on the left side of the machine tool 1 in a penetrating way and is obliquely arranged, a material inlet at the top of the material conveying guide rail 8 is arranged on the outer side of the machine tool 1, and a material outlet at the bottom of the material conveying guide rail 8 is arranged on the inner side of the machine tool 1 and penetrates through the steering adjusting cavity 7 to be connected with a material inlet of the annular track 702 in the adjusting cavity;
the material conveying limiting device 9 is arranged on one side of the inside of the material conveying guide rail 8, limiting plates 901 with different thicknesses are additionally arranged in the material conveying guide rail corresponding to the product width to change the width of a material conveying area of the material conveying guide rail 8, and the limiting plates 901 are arranged in parallel with the inner wall of the track of the material conveying guide rail 8;
the automatic material conveying mechanism 10 is arranged at one end of the material conveying guide rail 8 close to the steering adjusting cavity 7, and the speed of the product entering the steering adjusting cavity 7 from the material guiding rail 4 is controlled by the automatic material conveying mechanism 10.
According to a preferred solution, the material handling limiting device 9 comprises:
the limiting plate 901 is arranged in the material conveying guide rail 8 and is parallel to the inner wall of the track of the material conveying guide rail 8;
the limit bolt 902, the limit bolt 902 wears to put between limiting plate 901 and fortune material guide rail 8.
According to a preferred embodiment, the pair of limit bolts 902 is provided, one of the pair of limit bolts 902 is inserted into the feed opening of the material transporting guide rail 8, and the other is inserted into the material transporting guide rail 8 in a direction close to the casing of the machine tool 1.
According to a preferred aspect, the automated material handling mechanism 10 comprises:
the connecting plate 1001 is arranged in an L shape, and comprises a horizontal end 1005 and a vertical end 1006, wherein the vertical end 1006 is fixed on one side, close to the limiting plate 901, of the outer side of the material conveying guide rail 8, and the horizontal end 1005 is arranged above the material conveying guide rail 8 and is perpendicular to a material conveying path;
the sensing cylinder 1002, the said sensing cylinder 1002 is fixed under horizontal end 1005, the sensing cylinder rod 1004 of the sensing cylinder 1002 moves up and down and blocks the supplies towards the material area of the material transporting guide rail 8;
a sensing head 1003, the sensing head 1003 is arranged at the bottom of a sensing cylinder rod 1004 of the sensing cylinder 1002.
According to a preferred embodiment, a coolant group separator 13 is also provided in the machine tool 1 perpendicular to the table 2, said coolant group separator 13 being located between the automatic feed mechanism 10 and the rear grinding machine processing zone in the machine tool 1.
According to a preferred version, the steering adjustment chamber 7 comprises;
the cavity 701 is cylindrical, the top of the cavity 701 is provided with a sealing cover plate 703, and the bottom of the cavity is open;
the annular track 702, the annular track 702 sets up in the cavity 701, the annular track 702 divide into three sections, and the upper segment is that slope track top material guide rail 8 bottom is in succession and is continuous with being curved middle section, and the middle section is held upper segment and hypomere, and the middle section is arc structure, and the hypomere links to each other with the bottom guide track, and the product realizes turning to along the track of arc structure and accomplishes the position adjustment.
According to a preferred solution, the pushing unit 5:
the pushing cylinder 501 is arranged at one end, far away from the mechanical arm 3, of the guide track 4, a pushing cylinder rod 502 of the pushing cylinder 501 is connected with a pushing block 503, the pushing block 503 is arranged in the guide track 4, and the pushing cylinder 501 drives the pushing cylinder rod 502 to enable the pushing block 503 to drive a product to enter the mechanical arm material taking area 6;
according to a preferred embodiment, the mechanical arm reclaiming area 6 comprises:
the safety block 601 is arranged at one end of the material guide track 4, which is close to the mechanical arm 3;
the material taking opening 602 is arranged at one side of the material guiding track 4, which is close to the mechanical arm 3, and is positioned in the operation angle of the mechanical arm 3.
The utility model adopts the mechanical arm, the material guide rail, the steering adjusting cavity, the material conveying guide rail, the material conveying limiting device and the automatic material conveying mechanism to realize the purpose of semi-automatic blanking of the machine tool, so that one person can manage the effects of a plurality of machines.
Preferred embodiments for carrying out the present utility model will be described in more detail below with reference to the attached drawings so that the features and advantages of the present utility model can be easily understood.
Drawings
FIG. 1 is a schematic perspective view of the present utility model;
FIG. 2 is a schematic perspective view of a material transporting rail according to the present utility model;
FIG. 3 is a schematic perspective view of a guide rail according to the present utility model;
FIG. 4 is a top view of the present utility model with the seal cover removed with respect to the steering adjustment chamber;
description of the reference numerals
1. A machine tool; 2. a work table; 3. a mechanical arm; 4. a material guiding rail; 5. a pushing unit; 501. a pushing cylinder; 502. a pushing cylinder rod; 503. a pushing block; 6. a mechanical arm material taking area; 601. a safety block; 602. a material taking port; 7. a steering adjustment chamber; 701. a cavity; 702. an endless track; 703. sealing the cover plate; 8. a material conveying guide rail; 9. a material transporting limiting device;
901. a limiting plate; 902. a limit bolt; 10. an automatic material conveying mechanism; 1001. a connecting plate; 1002. a sensing cylinder;
1003. an induction head; 1004. a sensing cylinder rod; 1005. a horizontal end; 1006. a vertical end; 11. a base; 12. grinding the processing area; 13. a coolant group separator.
Detailed Description
In order to make the objects, technical solutions and advantages of the technical solutions of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present utility model. Like reference numerals in the drawings denote like parts. It should be noted that the described embodiments are some, but not all embodiments of the present utility model. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present utility model fall within the protection scope of the present utility model.
Possible embodiments within the scope of the utility model may have fewer components, have other components not shown in the drawings, different components, differently arranged components or differently connected components, etc. than the examples shown in the drawings. Furthermore, two or more of the elements in the figures may be implemented in a single element or a single element shown in the figures may be implemented as multiple separate elements.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
The utility model provides a semi-automatic blanking device of a numerical control grinding machine, which is used in a bearing production and processing technology, and the type of a processed bearing is not limited, but the structure of the automatic material conveying machine is particularly suitable for semi-automatic production of the bearing.
In general, the semi-automatic blanking device of the numerically controlled grinder provided by the utility model mainly comprises a machine tool 1, a mechanical arm 3, a guide rail 4, a steering adjusting cavity 7, a material conveying guide rail 8, a material conveying limiting device 9 and an automatic material conveying mechanism 10, wherein, referring to fig. 1, the arrangement relation of the machine tool 1, the mechanical arm 3, the guide rail 4, the steering adjusting cavity 7 and the material conveying guide rail 8 is shown.
As shown in fig. 1, in order to achieve the purpose of increasing the safety by extending the material transporting guide rail 8 and adding one person to manage a plurality of machines, the material transporting guide rail 8 of the product is installed on the side surface of the machine tool 1 in a redirecting way from the material transporting guide rail 8 which extends towards the operation table of the operator, and compared with the scheme of extending the material transporting guide rail 8 which extends towards the operator, the design improves the safety of production, and can maximally extend the material transporting guide rail 8 to enable the material transporting guide rail 8 to be placed with the full product for automatic discharging without the operator to directly stand in front of the machine tool for manually discharging one person by one person, thereby realizing that one person manages the machine tool 1 and saving the labor cost. On this basis, the material conveying guide rail 8 is correspondingly adjusted, the material conveying guide rail 8 is obliquely arranged, the feeding port at the top of the material conveying guide rail 8 is arranged outside the machine tool 1, the bottom discharging port is arranged on the inner side of the machine tool 1 and penetrates through the steering adjusting cavity 7 to be connected with the feeding port of the annular track 702 in the adjusting cavity, the material conveying guide rail 8 is formed, the feeding port placing height is higher than that of the discharging port, products can be enabled to be arranged along the material conveying guide rail 8, the original edition design is that the material conveying guide rail 8 is shorter, one material conveying guide rail 8 is placed by an operator, when the operator feeds, the operator gives a forward force to the products, the time and the labor are consumed, the efficiency is influenced, and the material conveying guide rail 8 which is arranged in an oblique mode is prolonged and improves the working efficiency.
In order to further achieve the purpose of semi-automatic blanking of the machine tool 1, an automatic material conveying mechanism 10 is added, as shown in fig. 2, the automatic material conveying mechanism 10 is installed on one end, close to the steering adjusting cavity 7, of a material conveying guide rail 8, a connecting plate 1001 is arranged, the connecting plate 1001 is arranged to be L-shaped and comprises a horizontal end 1005 and a vertical end 1006, the vertical end 1006 is fixed on one side, close to a limiting plate 901, of the outer side of the material conveying guide rail 8, the horizontal end 1005 is arranged above the material conveying guide rail 8, is perpendicular to a material conveying path and is also provided with a sensing cylinder 1002 below the horizontal end 1005, a sensing cylinder rod 1004 of the sensing cylinder 1002 is connected with a sensing head 1003 below the sensing cylinder rod 1004, wherein the fact that the sensing cylinder 1002 and the sensing head 1003 are needed to be specifically explained is located in the middle of a conveying area of the material conveying guide rail 8, products can be effectively blocked when the sensing cylinder rod 1004 extends completely, a machine tool 1 controller stretches out and stretches out the sensing cylinder rod 1004 after the mechanical arm 3 sends products into a grinding processing area 12 to finish, so that next products finally enter the sensing arm area 1003, and if a person can not be reminded of the fact that the sensing cylinder rod is blocked by the pressure of the machine tool is needed to be blocked by the manual operation.
And in order to better achieve the purpose of semi-automatic blanking of the machine tool 1, the product is not clamped on the material conveying guide rail 8, the material conveying limiting device 9 is additionally arranged on one side of the interior of the material conveying guide rail 8, limiting plates 901 with different thicknesses are additionally arranged in the material conveying guide rail corresponding to the width of the product to change the width of a material conveying region of the material conveying guide rail 8, the limiting plates 901 are arranged in parallel with the inner wall of the track of the material conveying guide rail 8, the width of the material conveying region of the material conveying guide rail 8 can be changed according to the thickness of a processed product, the situation that the product is blocked in the middle of the material conveying guide rail 8 and cannot reach a material conveying guide rail 8 discharge hole during manual feeding can be effectively prevented, and the fact that the limiting plates 901 in the device are of a plastic hollow structure are light and convenient to install is required to be explained, and the stability of the guide rail cannot be influenced when the device is arranged on the material conveying guide rail 8.
In order to further achieve the purpose of semi-automatic blanking of the machine tool 1, because the improved material conveying guide rail 8 is improved on the side surface of the machine tool, the position of a product falling into the material guiding track 4 changes, the steering adjusting cavity 7 is additionally arranged, as shown in fig. 4, the steering adjusting cavity 7 is arranged above the material guiding track 4 in the machine tool 1, the bottom outlet is connected to the direction of the material guiding track 4 far away from the mechanical arm 3, the annular track 702 is arranged in the steering adjusting cavity 7, the annular track 702 is divided into three sections, the upper section is formed by connecting the bottom of the material conveying guide rail 8 with the bottom of the slope track, the middle section is connected with the upper section and the lower section, the middle section is of an arc structure, the lower section is connected with the bottom material guiding track 4, the product is steered along the track of the arc structure to achieve direction adjustment, the cavity 701 is cylindrical to be emphasized, the top is provided with the sealing cover plate 703, and the cooling liquid can be prevented from being splashed into the annular track 702 in the cavity 701 by waste iron scraps, and the product slides on the annular track 702 to be blocked.
In order to further realize the purpose of semi-automatic blanking of the machine tool 1, the pushing unit 5 is additionally arranged in order to enable the product to finally enter the mechanical arm material taking area 6 because the distance of product blanking is prolonged by increasing the inner ring track 702 in the cavity of the steering adjusting cavity 7, the speed of the product falling into the material guiding track 4 is reduced. As shown in fig. 3, the pushing unit 5 is disposed in the guiding track 4 and is composed of a pushing cylinder 501, a pushing cylinder rod 502 and a pushing block 503, wherein the pushing cylinder 501 is disposed at one end of the guiding track 4 far away from the mechanical arm 3, the pushing cylinder rod 502 of the pushing cylinder 501 is connected with the pushing block 503, the pushing block 503 is disposed in the guiding track 4, and the pushing cylinder 501 drives the pushing cylinder rod 502 to enable the pushing block 503 to drive a product to enter the mechanical arm material taking area 6.
Finally, a safety block 601 and a material taking opening 602 are arranged in the material taking area 6 of the mechanical arm, wherein the safety block 601 is arranged at one end of the material guiding track 4, which is close to the mechanical arm 3, in order to prevent products from separating from the material guiding track 4, and the material taking opening 602 is arranged at one side of the material guiding track 4, which is close to the mechanical arm 3, and is positioned in the operation angle of the mechanical arm 3, and the material taking opening is formed to facilitate the clamping of the mechanical arm 3 to the products, reduce the programming steps of operators and reduce the use difficulty.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (6)
1. Semi-automatic unloader of numerically control grinder, its characterized in that includes:
a machine tool (1), wherein a workbench (2) is arranged inside the machine tool (1);
the mechanical arm (3) is arranged in the machine tool (1) and is installed on the workbench (2), and products in the grabbing and guiding track (4) are sent into the grinding processing area (12);
the material guiding rail (4), the material guiding rail (4) is arranged in the machine tool (1) and positioned at the left side of the mechanical arm (3) and is connected with the workbench (2) through the bottom base (11), a material pushing unit (5) is arranged in the material guiding rail (4), and the material pushing unit (5) pushes a product falling into the material guiding rail (4) to enter the mechanical arm material taking area (6);
the device comprises a steering adjusting cavity (7), wherein the steering adjusting cavity (7) is arranged in a machine tool (1) and is positioned above a guide rail (4), a bottom outlet is connected to the guide rail (4) in the direction away from a mechanical arm (3), an annular rail (702) is arranged in the steering adjusting cavity (7), a bottom discharge hole of the annular rail (702) is arranged right above the guide rail (4) in parallel, a top feed hole is connected with a discharge hole at the bottom of an upper material conveying guide rail (8), and products in the material conveying guide rail (8) are received to be conveyed into the guide rail (4);
the material conveying guide rail (8) is arranged on the left side of the machine tool (1) in a penetrating manner, a material inlet at the top of the material conveying guide rail (8) is arranged on the outer side of the machine tool (1), and a bottom material outlet is arranged on the inner side of the machine tool (1) and penetrates through the steering adjusting cavity (7) to be connected with a material inlet of the annular track (702) in the adjusting cavity;
the material conveying limiting device (9), the material conveying limiting device (9) is arranged on one side of the inside of the material conveying guide rail (8), limiting plates (901) with different thicknesses are additionally arranged in the material conveying guide rail corresponding to the product width to change the width of a material conveying area of the material conveying guide rail (8), and the limiting plates (901) are arranged in parallel with the inner wall of a track of the material conveying guide rail (8);
the automatic material conveying mechanism (10), the automatic material conveying mechanism (10) is arranged at one end of the material conveying guide rail (8) close to the steering adjusting cavity (7) to control the speed of a product entering the steering adjusting cavity (7) from the material guiding rail (4).
2. Semi-automatic blanking device of a numerically controlled grinder according to claim 1, characterized in that said material transporting limiting device (9) comprises:
the limiting plate (901) is arranged in the material conveying guide rail (8) and is arranged in parallel with the inner wall of the track of the material conveying guide rail (8);
the limiting bolt (902) is arranged between the limiting plate (901) and the material conveying guide rail (8) in a penetrating mode.
3. The semi-automatic blanking device of a numerically controlled grinder as set forth in claim 2, wherein the automatic material handling mechanism (10) includes:
the connecting plate (1001), the connecting plate (1001) is arranged to be L-shaped and comprises a horizontal end (1005) and a vertical end (1006), the vertical end (1006) is fixed on one side, close to the limiting plate (901), of the outer side of the material conveying guide rail (8), and the horizontal end (1005) is arranged above the material conveying guide rail (8) and is perpendicular to a material conveying path;
the sensing cylinder (1002), the said sensing cylinder (1002) is fixed under horizontal end (1005), the sensing cylinder pole (1004) of the sensing cylinder (1002) moves up and down and blocks the supplies towards the material area of the material transporting guide rail (8);
and the sensing head (1003) is arranged at the bottom of a sensing cylinder rod (1004) of the sensing cylinder (1002).
4. A semi-automatic blanking device of a numerically controlled grinder according to claim 3, characterized in that the steering adjustment chamber (7) comprises;
the cavity (701) is cylindrical, the top of the cavity (701) is provided with a sealing cover plate (703), and the bottom of the cavity is open;
the circular orbit (702), circular orbit (702) sets up in cavity (701), circular orbit (702) divide into the syllogic, and the upper segment is that slope track top material guide rail (8) bottom is in succession and is continuous with being curved middle section, and the middle section is held upper segment and hypomere, and the middle section is arc structure, and the hypomere links to each other with the bottom guide track, and the product is realized turning to along the track of arc structure and is accomplished the position adjustment.
5. Semi-automatic blanking device of a numerically controlled grinder according to claim 4, characterized in that said pushing unit (5):
the pushing device comprises a pushing cylinder (501), wherein the pushing cylinder (501) is arranged at one end, far away from the mechanical arm (3), of a guide track (4), a pushing cylinder rod (502) of the pushing cylinder (501) is connected with a pushing block (503), the pushing block (503) is arranged in the guide track (4), and the pushing cylinder (501) drives the pushing cylinder rod (502) to enable the pushing block (503) to drive a product to enter the mechanical arm material taking area (6).
6. The semiautomatic blanking device of the numerically controlled grinder as set forth in claim 5, wherein the mechanical arm material taking area (6) includes:
the safety block (601) is arranged at one end of the material guide rail (4) close to the mechanical arm (3);
the material taking opening (602), the material taking opening (602) is arranged at one side of the material guiding track (4) close to the mechanical arm (3) and is positioned in the operation angle of the mechanical arm (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222735205.7U CN219255204U (en) | 2022-10-17 | 2022-10-17 | Semi-automatic unloader of numerically control grinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222735205.7U CN219255204U (en) | 2022-10-17 | 2022-10-17 | Semi-automatic unloader of numerically control grinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219255204U true CN219255204U (en) | 2023-06-27 |
Family
ID=86872962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222735205.7U Active CN219255204U (en) | 2022-10-17 | 2022-10-17 | Semi-automatic unloader of numerically control grinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219255204U (en) |
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2022
- 2022-10-17 CN CN202222735205.7U patent/CN219255204U/en active Active
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