CN217477295U - High-load-resistant sleeper beam structure and rail vehicle - Google Patents
High-load-resistant sleeper beam structure and rail vehicle Download PDFInfo
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- CN217477295U CN217477295U CN202221802272.XU CN202221802272U CN217477295U CN 217477295 U CN217477295 U CN 217477295U CN 202221802272 U CN202221802272 U CN 202221802272U CN 217477295 U CN217477295 U CN 217477295U
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Abstract
The utility model provides a high-load-resistant sleeper beam structure and a rail vehicle, belonging to the technical field of metal rust removal, comprising an upper cover plate, a lower cover plate, a web plate, a longitudinal supporting beam and a longitudinal traction plate; the lower cover plate is provided with an operation hole, the length direction of the web plate is consistent with that of the upper cover plate, the lower end of the web plate is fixedly connected with the lower cover plate, the length direction of the longitudinal support beam is vertical to the web plate, and each longitudinal support beam is fixedly connected with each web plate; the longitudinal support beam comprises a vertical plate and a horizontal plate, the vertical plate is fixedly connected with the lower cover plate, and the horizontal plate is fixedly connected with the upper cover plate; the longitudinal traction plates are multiple and are arranged in parallel at intervals; the longitudinal traction plates are arranged in parallel with the longitudinal support beams, and each longitudinal traction plate is fixedly connected with each web plate; the longitudinal traction plate is fixedly connected with the upper cover plate. The utility model provides an anti high load sleeper beam structure, bearing capacity is stronger, can bear higher load.
Description
Technical Field
The utility model belongs to the technical field of the metal rust cleaning, more specifically say, relate to an anti high load sleeper beam structure and rail vehicle.
Background
The bolster, as an important stressed component of the vehicle, bears the entire mass load of the vehicle, its structural rigidity also affects the torsional rigidity of the vehicle, and at the same time, the bolster also provides an interface for the mounting of the bogie, and its design is limited by the requirements of the bogie mounting. The existing sleeper beam is fixedly provided with the sleeper beam through a web plate, so that the load resisting capacity of the web plate is reduced; and the connection between the web plate, the supporting beam and the like in the sleeper beam and the upper cover plate and the lower cover plate is not firm enough, and the bearing capacity of the whole sleeper beam is also influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an anti high load sleeper beam structure and rail vehicle to solve the relatively poor technical problem of anti load-carrying capacity of the sleeper beam structure that exists among the prior art.
In order to achieve the above object, the utility model adopts the following technical scheme: the high-load-resistant sleeper beam structure comprises an upper cover plate, a lower cover plate, a web plate, a longitudinal supporting beam and a longitudinal traction plate, wherein the web plate, the longitudinal supporting beam and the longitudinal traction plate are arranged between the upper cover plate and the lower cover plate;
the lower cover plate is provided with an operation hole for fixedly mounting a bogie;
the web plates are multiple and are arranged in parallel at intervals; the length direction of the web plate is consistent with that of the upper cover plate; the lower end of the web plate is fixedly connected with the lower cover plate;
the plurality of longitudinal supporting beams are arranged in parallel at intervals; the length direction of the longitudinal support beam is perpendicular to the web plate; each longitudinal supporting beam is fixedly connected with each web plate; the longitudinal supporting beam comprises a vertical plate and a horizontal plate fixedly arranged at the upper end of the vertical plate, the lower end of the vertical plate is fixedly connected with the lower cover plate, the upper cover plate is provided with a plurality of first connecting holes, and the horizontal plate is fixedly connected with the upper cover plate through the first connecting holes;
the plurality of longitudinal traction plates are arranged in parallel at intervals; the longitudinal traction plates are arranged in parallel with the longitudinal support beams, and each longitudinal traction plate is fixedly connected with each web plate; the upper cover plate is provided with a plurality of second connecting holes, and the longitudinal traction plate is fixedly connected with the upper cover plate through the second connecting holes.
In a possible implementation manner, the longitudinal supporting beam is an L-shaped bending piece.
In a possible implementation manner, the plurality of longitudinal supporting beams are divided into two groups and are respectively arranged on two sides of the upper end of the lower cover plate; the horizontal plates on one set of the longitudinal support beams extend toward or away from the other set of the longitudinal support beams.
In a possible implementation manner, the plurality of longitudinal supporting beams are divided into two groups and are respectively arranged on two sides of the upper end of the lower cover plate; the plurality of longitudinal traction plates are divided into two groups and are positioned between the two groups of longitudinal support beams.
In one possible implementation, the longitudinal support beam, the longitudinal traction plate and the web are the same height.
In a possible implementation manner, the upper end of the longitudinal traction plate is provided with a protruding part, and the protruding part is positioned in the corresponding second connecting hole.
In a possible implementation manner, the protruding portion has a long strip structure, and the second connection hole is a long strip hole.
In a possible realization, the orifice of the elongated hole is provided with a bevel for welding.
In a possible implementation manner, the lower cover plate is provided with an installation seat used for being connected with a bogie and an operation hole located on one side of the installation seat.
The utility model provides an anti high load sleeper beam structure's beneficial effect lies in: compared with the prior art, the utility model discloses anti high load sleeper beam structure, set up a plurality of webs parallel interval, a plurality of longitudinal support beam parallel arrangement, and arrange with a plurality of webs quadrature, a plurality of longitudinal traction plate parallel arrangement, and arrange with a plurality of webs quadrature, a plurality of longitudinal support beam and a plurality of longitudinal traction plate all form the frame with a plurality of webs through welded fastening each other, and with this frame mounting under on the apron, the web, the equal welded fastening of lower extreme of longitudinal support beam and longitudinal traction plate is on the apron down, install the upper cover plate on the frame again, and first connecting hole is corresponding with longitudinal support beam, the upper cover plate is through first connecting hole and longitudinal support beam welded fastening, the second connecting hole is corresponding with longitudinal traction plate, the upper cover plate adopts welded fastening through second connecting hole and longitudinal traction plate, thereby form whole sleeper beam structure. In this way, the operation hole is arranged on the lower cover plate and does not need to be arranged on the web plate, so that the web plate can bear higher load; the longitudinal support beams and the longitudinal traction plates are arranged orthogonally to the web plate and are fixed by welding to form a frame; the longitudinal supporting beams and the longitudinal traction plates are fixedly connected with the upper cover plate and the lower cover plate, the lower ends of the webs are fixedly connected with the lower cover plate, and a sleeper beam structure formed by the webs, the longitudinal supporting beams, the longitudinal traction plates, the lower cover plate and the upper cover plate is high in bearing capacity and capable of bearing higher load.
Another object of the present invention is to provide a railway vehicle, including any one of the above-mentioned high load resistant sleeper beam structures.
The utility model provides a rail vehicle owing to adopted anti high load sleeper beam structure, consequently, has strengthened rail vehicle's bearing capacity, can bear higher load.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a first schematic structural diagram of a high load resistant sleeper beam structure provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram ii of a high load resistant sleeper beam structure provided in the embodiment of the present invention;
fig. 3 is a schematic structural diagram of a high load resisting sleeper beam structure without an upper cover plate according to an embodiment of the present invention;
fig. 4 is a cross-sectional view of a high load resistant bolster structure provided by an embodiment of the present invention;
fig. 5 is a schematic structural view of a longitudinal traction plate according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1. an upper cover plate; 11. a first connection hole; 12. a second connection hole; 2. a lower cover plate; 21. an operation hole; 22. a mounting seat; 3. a web; 4. a longitudinal support beam; 41. a vertical plate; 42. a horizontal plate; 5. a longitudinal traction plate; 51. a projection.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 to 4, a high load resisting sleeper beam structure provided by the present invention will now be described. A high-load-resistant sleeper beam structure comprises an upper cover plate 1, a lower cover plate 2, a web plate 3, a longitudinal support beam 4 and a longitudinal traction plate 5, wherein the web plate 3, the longitudinal support beam 4 and the longitudinal traction plate 5 are arranged between the upper cover plate 1 and the lower cover plate 2;
the lower cover plate 2 is provided with an operation hole 21 for fixedly installing a bogie;
a plurality of webs 3 are arranged in parallel at intervals; the length direction of the web 3 is consistent with that of the upper cover plate 1; the lower end of the web 3 is fixedly connected with the lower cover plate 2;
a plurality of longitudinal supporting beams 4 are arranged in parallel at intervals; the length direction of the longitudinal support beam 4 is vertical to the web 3; each longitudinal support beam 4 is fixedly connected with each web 3; the longitudinal support beam 4 comprises a vertical plate 41 and a horizontal plate 42 fixedly installed at the upper end of the vertical plate 41, the lower end of the vertical plate 41 is fixedly connected with the lower cover plate 2, the upper cover plate 1 is provided with a plurality of first connecting holes 11, and the horizontal plate 42 is fixedly connected with the upper cover plate 1 through the first connecting holes 11;
the plurality of longitudinal traction plates 5 are arranged in parallel at intervals; the longitudinal traction plates 5 are arranged in parallel with the longitudinal support beams 4, and each longitudinal traction plate 5 is fixedly connected with each web plate 3; a plurality of second connecting holes 12 are formed in the upper cover plate 1, and the longitudinal traction plate 5 is fixedly connected with the upper cover plate 1 through the second connecting holes 12.
Compared with the prior art, the utility model provides an anti high load sleeper beam structure, set up a plurality of webs 3 parallel interval, a plurality of longitudinal support beam 4 parallel, and with a plurality of webs 3 orthogonal arrangement, a plurality of longitudinal traction plate 5 parallel, and with a plurality of webs 3 orthogonal arrangement, a plurality of longitudinal support beam 4 and a plurality of longitudinal traction plate 5 all with a plurality of webs 3 through welded fastening formation frame each other, and install this frame on the lower cover plate 2, the web 3, the longitudinal support beam 4 and the lower extreme of longitudinal traction plate 5 all welded fastening on the lower cover plate 2, again install upper cover plate 1 on the frame, and first connecting hole 11 and longitudinal support beam 4 are corresponding, upper cover plate 1 and longitudinal support beam 4 welded fastening through first connecting hole 11, second connecting hole 12 and longitudinal traction plate 5 are corresponding, upper cover plate 1 adopts welded fastening with longitudinal traction plate 5 through second connecting hole 12, thereby forming the entire bolster structure. In this way, the operation hole 21 is formed on the lower cover plate 2 without being formed on the web 3, so that the web 3 can bear higher load; a plurality of longitudinal support beams 4 and a plurality of longitudinal traction plates 5 are arranged orthogonally to the web 3 and are fixed by welding to form a frame; the longitudinal supporting beam 4 and the longitudinal traction plate 5 are fixedly connected with the upper cover plate 1 and the lower cover plate 2, the lower end of the web plate 3 is fixedly connected with the lower cover plate 2, and a sleeper beam structure formed by the web plates 3, the longitudinal supporting beam 4, the longitudinal traction plate 5, the lower cover plate 2 and the upper cover plate 1 has stronger bearing capacity and can bear higher load.
The web 3, the longitudinal support beam 4 and the longitudinal traction plate 5 are connected by fillet welds; the longitudinal traction plate 5 and the upper cover plate 1 are connected through a second connecting hole 12 by adopting a penetration welding seam. Each longitudinal support beam 4 comprises a plurality of plates which are arranged independently, the plates are arranged in the same direction at intervals, and the plates of the same longitudinal support beam 4 are respectively positioned between every two adjacent webs 3; similarly, each longitudinal traction plate 5 comprises a plurality of plates which are arranged separately, and the plates are arranged at intervals in the same direction, and the plates of the same longitudinal traction plate 5 are respectively arranged between the adjacent webs 3.
Preferably, four webs 3, four longitudinal support beams 4 and two longitudinal traction plates 5 are arranged; the web 3 is arranged transversely and the longitudinal support beam 4 and the longitudinal traction plate 5 are arranged longitudinally.
The lower end of the lower cover plate 2 is fixedly provided with an installation seat 22 for installing a bogie, and a small number of operation holes 21 can be formed in the web plate 3, so that the bogie can be conveniently installed.
The upper cover plate 1 is supported by the web 3 in contact with the upper end of the web 3 and is not fixed by welding.
Referring to fig. 3 and 4, as a specific embodiment of the high load resisting sleeper beam structure provided in the present invention, the longitudinal supporting beam 4 is an L-shaped bending member; that is, the longitudinal support beam 4 is formed by bending a plate, and the vertical plate and the horizontal plate 42 are integrally formed, so that the connection strength and the bearing performance between the vertical plate and the horizontal plate are high, and the acting force transmission effect between the upper cover plate 1 and the lower cover plate 2 is better and accurate. The L-shaped bending piece is adopted as the longitudinal supporting beam 4, the installation is accurate and convenient, and the horizontal plate 42 and the vertical plate do not need to be installed independently.
Referring to fig. 3 and 4, as a specific embodiment of the high load resisting sleeper beam structure provided in the present invention, the plurality of longitudinal supporting beams 4 are divided into two groups, and are respectively disposed on two sides of the upper end of the lower cover plate 2; the horizontal plates 42 on one set of longitudinal support beams 4 extend toward or away from the other set of longitudinal support beams 4; at least two longitudinal supporting beams 4 are arranged in each group, and the longitudinal supporting beams 4 in each group are symmetrically arranged on two sides of the central line of the lower cover plate 2, so that the sleeper beam is uniformly stressed in the transverse direction. And the extending directions of the horizontal plates 42 of each group of longitudinal supporting beams 4 are the same, and the extending directions of the horizontal plates 42 of the two groups of longitudinal supporting beams 4 are opposite, so that after the upper cover plate 1 is arranged on a frame consisting of a plurality of web plates 3, a plurality of longitudinal supporting beams 4 and a plurality of longitudinal traction plates 5, the installation process is more stable and accurate, and the stress of the upper cover plate 1 on two sides of the frame is balanced.
Referring to fig. 3 and 4, as a specific embodiment of the high load resisting sleeper beam structure provided in the present invention, a plurality of longitudinal supporting beams 4 are divided into two groups, and are respectively disposed on two sides of the upper end of the lower cover plate 2; the plurality of longitudinal traction plates 5 are divided into two groups and are positioned between the two groups of longitudinal support beams 4; at least two longitudinal supporting beams 4 are arranged in each group, and the central lines of the cover plates 2 below the longitudinal supporting beams 4 in each group are symmetrically arranged on two sides, so that the sleeper beams are uniformly stressed in the transverse direction; meanwhile, two groups of longitudinal traction plates 5 are arranged, the two groups of longitudinal traction plates 5 are symmetrically arranged on two sides by using the central line of the lower cover plate 2, and the two groups of longitudinal traction plates 5 are positioned between the two groups of longitudinal support beams 4, so that the support blank area between the two groups of longitudinal support beams 4 is filled, and each part of the whole sleeper beam structure has stronger bearing capacity and high-load resistance.
Referring to fig. 4, as a specific embodiment of the high load resisting sleeper beam structure provided in the present invention, the heights of the longitudinal supporting beam 4, the longitudinal traction plate 5 and the web 3 are the same; after the lower ends of the longitudinal supporting beam 4, the longitudinal traction plate 5 and the web plate 3 are fixed on the lower cover plate 2 in a welding mode and the like, the upper ends of the longitudinal supporting beam 4, the longitudinal traction plate 5 and the web plate 3 are positioned on the same horizontal plane, when the upper cover plate 1 is installed on a frame, the lower end face of the upper cover plate 1 is abutted against the upper ends of the longitudinal supporting beam 4, the longitudinal traction plate 5 and the web plate 3, and a surface is formed to be connected, so that the purpose of supporting the upper cover plate 1 is achieved, and the acting force applied to the upper cover plate 1 can be smoothly transmitted to the frame. Meanwhile, the mode is also beneficial to the welding and fixing of the longitudinal support beam 4, the longitudinal traction plate 5 and the upper cover plate 1. First connecting hole 11, the second connecting hole 12 on the upper cover plate 1 are the multiunit, and the first connecting hole 11 of multiunit and a plurality of longitudinal support beam 4 one-to-one, multiunit second connecting hole 12 and a plurality of longitudinal traction plate 5 one-to-one.
Referring to fig. 3 to 5, as a specific embodiment of the high load resisting sleeper beam structure provided in the present invention, a protrusion 51 is provided at an upper end of the longitudinal traction plate 5, and the protrusion 51 is located in the corresponding second connecting hole 12; when the upper cover plate 1 is installed on the frame, the second connecting hole 12 of the upper cover plate 1 is installed in cooperation with the protruding part 51 of the longitudinal traction plate 5, so that the purpose of limiting installation of the upper cover plate 1 is achieved, and the upper cover plate 1 is installed more quickly and accurately. The protruding part 51 is arranged to enter the second connecting hole 12 from bottom to top, and a worker welds the protruding part 51 and the upper cover plate 1 through the second connecting hole 12 to realize the fixed installation of the longitudinal traction plate 5 and the upper cover plate 1.
Referring to fig. 1, 3 and 4, as a specific embodiment of the high load resisting sleeper beam structure provided by the present invention, the protruding portion 51 is a long strip structure, and the second connecting hole 12 is a long strip hole; the effective working area of the protruding part 51 and the second connecting hole 12 is increased, so that the connecting area between the upper cover plate 1 and the longitudinal traction plate 5 is increased, and when the upper cover plate 1 and the longitudinal traction plate 5 are welded, the welding area and the usage amount of welding flux are increased, and further the welding quality and the fixed connection firmness of the upper cover plate 1 and the longitudinal traction plate 5 are greatly improved.
Preferably, the elongated hole is a rectangular hole and the projection 51 is a rectangular block.
Referring to fig. 1, 3 and 4, as a specific embodiment of the high load resistant sleeper beam structure provided by the present invention, the orifices of the elongated holes are provided with grooves for welding; the groove is arranged to be annular, the groove is arranged around the hole opening of the strip hole, after the upper cover plate 1 is installed on a frame formed by a plurality of webs 3, a plurality of longitudinal supporting beams 4 and a plurality of longitudinal traction plates 5, the protruding portion 51 at the upper end of each longitudinal traction plate 5 enters the corresponding second connecting hole 12, and then a worker fixedly connects the longitudinal traction plates 5 and the upper cover plate 1 in the position of the corresponding second connecting hole 12 through a penetration welding seam. The groove enables workers to carry out welding operation more conveniently and accurately, the area of a welding area is increased, and the welding effect is firmer.
Referring to fig. 1 to 3, as a specific embodiment of the high load resistant sleeper beam structure provided in the present invention, a plurality of webs 3 are uniformly installed on a lower cover plate 2; the length direction of web 3 is unanimous with the transverse direction of sleeper beam, and consequently a plurality of webs 3 parallel sets up side by side, and sets up along the vertical direction equipartition of apron 2 down, and consequently a plurality of webs 3 when bearing higher load, and each web 3 atress is even, has both guaranteed the anti high load-carrying capacity and the bearing capacity of whole sleeper beam, also can not appear single web 3 atress too big and impaired condition, more is favorable to the sleeper beam to pass through the high load operating mode.
In the drawings, the embodiment of the present invention further provides a rail vehicle, which includes any one of the above-mentioned high-load-resisting sleeper beam structures.
The utility model provides a rail vehicle has adopted foretell anti high load sleeper beam structure, has strengthened rail vehicle's bearing capacity, can bear higher load.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A high-load-resistant sleeper beam structure is characterized by comprising an upper cover plate, a lower cover plate, a web plate, a longitudinal supporting beam and a longitudinal traction plate, wherein the web plate, the longitudinal supporting beam and the longitudinal traction plate are arranged between the upper cover plate and the lower cover plate;
the lower cover plate is provided with an operation hole for fixedly mounting a bogie;
the number of the webs is multiple, and the webs are arranged in parallel at intervals; the length direction of the web plate is consistent with that of the upper cover plate; the lower end of the web plate is fixedly connected with the lower cover plate;
the plurality of longitudinal supporting beams are arranged in parallel at intervals; the length direction of the longitudinal support beam is vertical to the web plate; each longitudinal supporting beam is fixedly connected with each web plate; the longitudinal support beam comprises a vertical plate and a horizontal plate fixedly mounted at the upper end of the vertical plate, the lower end of the vertical plate is fixedly connected with the lower cover plate, the upper cover plate is provided with a plurality of first connecting holes, and the horizontal plate is fixedly connected with the upper cover plate through the first connecting holes;
the plurality of longitudinal traction plates are arranged in parallel at intervals; the longitudinal traction plates are arranged in parallel with the longitudinal support beams, and each longitudinal traction plate is fixedly connected with each web plate; the upper cover plate is provided with a plurality of second connecting holes, and the longitudinal traction plate is fixedly connected with the upper cover plate through the second connecting holes.
2. A high load resisting bolster structure as claimed in claim 1 wherein said longitudinal support beams are L-bend members.
3. The high load resisting bolster structure of claim 2, wherein a plurality of the longitudinal support beams are divided into two groups, respectively provided on both sides of the upper end of the lower cover plate; the horizontal plates on one set of the longitudinal support beams extend toward or away from the other set of the longitudinal support beams.
4. The high load resisting bolster structure of claim 1, wherein a plurality of said longitudinal support beams are divided into two groups, respectively provided on both sides of an upper end of said lower cover plate; the plurality of longitudinal traction plates are divided into two groups and are positioned between the two groups of longitudinal support beams.
5. A high load resisting bolster structure of claim 1 wherein said longitudinal support beams, said longitudinal traction plates and said web are of the same height.
6. The high load resisting bolster structure of claim 1 wherein the upper end of the longitudinal traction plates are provided with a protrusion that is located in the corresponding second attachment hole.
7. The high load resistant bolster structure of claim 6 wherein said projections are elongated structures and said second attachment holes are elongated holes.
8. The high load resistant bolster structure of claim 7 wherein the bore of said elongated hole is provided with a bevel for welding.
9. The high load resisting bolster structure of claim 1 wherein a plurality of said webs are uniformly mounted to said lower deck.
10. A railway vehicle comprising a high load resistant bolster structure of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221802272.XU CN217477295U (en) | 2022-07-12 | 2022-07-12 | High-load-resistant sleeper beam structure and rail vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221802272.XU CN217477295U (en) | 2022-07-12 | 2022-07-12 | High-load-resistant sleeper beam structure and rail vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217477295U true CN217477295U (en) | 2022-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221802272.XU Active CN217477295U (en) | 2022-07-12 | 2022-07-12 | High-load-resistant sleeper beam structure and rail vehicle |
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|---|---|
| CN (1) | CN217477295U (en) |
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- 2022-07-12 CN CN202221802272.XU patent/CN217477295U/en active Active
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