CN213008406U - Floor crossbeam mounting structure and car - Google Patents
Floor crossbeam mounting structure and car Download PDFInfo
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- CN213008406U CN213008406U CN202021175840.9U CN202021175840U CN213008406U CN 213008406 U CN213008406 U CN 213008406U CN 202021175840 U CN202021175840 U CN 202021175840U CN 213008406 U CN213008406 U CN 213008406U
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- floor
- plate
- mounting structure
- longitudinal beam
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Abstract
The utility model discloses a floor beam mounting structure and an automobile, which comprises a floor beam, a rear longitudinal beam and a threshold, wherein the floor beam is connected with the rear longitudinal beam, and the rear longitudinal beam is connected with the threshold; the floor beam comprises a floor beam and is characterized in that a first connecting part is arranged at the end part of the floor beam, a second connecting part is arranged on the rear longitudinal beam, the first connecting part is in lap joint with the second connecting part from top to bottom, at least three contact surfaces are formed by the first connecting part and the second connecting part in lap joint, and the bottom of the first connecting part is attached to the bottom of the rear longitudinal beam. The utility model discloses a floor crossbeam mounting structure's the complete high efficiency of biography power structure improves floor crossbeam and back longeron and threshold's mounting structure's intensity and rigidity, and can realize the lightweight design of car.
Description
Technical Field
The utility model relates to the field of automotive technology, especially, relate to a floor crossbeam mounting structure and car.
Background
Most components and assemblies of automobiles are fixed by frame structures, such as an engine, a transmission system, a suspension, a steering system, a cab, a trunk and related operating mechanisms. The frame structure generally comprises a plurality of cross beams, a plurality of longitudinal beams and a threshold, and plays a role in supporting and connecting various parts of the automobile and bears various loads from the inside and the outside of the automobile. When the automobile runs, the installation and operation of each assembly are required to be ensured to be reliable, passengers feel comfortable and safe, the frame structure has enough strength and proper rigidity and higher NVH (noise, vibration and harshness) performance, and the light weight of the automobile is required to be realized.
The frame structure among the prior art is equipped with the transition piece between crossbeam and the automobile body longeron and is connected, and this punching press transition piece is connected with crossbeam and longeron simultaneously through mechanical connection or welding, has increased the weight of car, is unfavorable for the lightweight design of car, and because the position of connecting is more, causes its intensity and rigidity weak, has the potential safety hazard.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of prior art, providing a floor beam mounting structure, can solve technical problem: the connecting structure of the cross beam and the vehicle body longitudinal beam in the prior art increases the weight of the vehicle, is not beneficial to the light weight design of the vehicle, and has weak strength and rigidity due to more connecting parts because of the addition of the transition piece, thereby having potential safety hazard; another object of the present invention is to provide a vehicle.
In order to achieve the above object, the utility model provides a floor beam mounting structure, which comprises a floor beam, a rear longitudinal beam and a threshold, wherein the floor beam is connected with the rear longitudinal beam, and the rear longitudinal beam is connected with the threshold;
the floor beam comprises a floor beam and is characterized in that a first connecting part is arranged at the end part of the floor beam, a second connecting part is arranged on the rear longitudinal beam, the first connecting part is in lap joint with the second connecting part from top to bottom, at least three contact surfaces are formed by the first connecting part and the second connecting part in lap joint, and the bottom of the first connecting part is attached to the bottom of the rear longitudinal beam.
Preferably, the first connecting portion comprises a first front connecting plate and a first rear connecting plate which are arranged in parallel at intervals from front to back, a rib plate is arranged at the upper part between the first front connecting plate and the first rear connecting plate, and the first front connecting plate, the first rear connecting plate and the rib plate form a lap joint groove lapped with the second connecting portion;
the second connecting portion include with the preceding connecting plate of second of first preceding connecting plate contact, with the connecting plate behind the second of first back connecting plate contact, and connect before the second connecting plate with the left connecting plate of connecting plate behind the second, the laminating is in from top to bottom in the floor the preceding connecting plate of second with the top of connecting plate behind the second, butt is in about the bottom of first connecting portion on the left connecting plate.
Preferably, the transverse length of the first front connecting plate is greater than that of the first rear connecting plate, and the transverse length of the first rear connecting plate is greater than that of the bottom of the first connecting portion.
Preferably, the floor beam comprises a front side plate and a rear side plate which are arranged in parallel at intervals in a front-rear direction, and an upper side plate and a lower side plate which are arranged in an up-down opposite interval, wherein the front side plate, the rear side plate, the upper side plate and the lower side plate form a transversely extending mounting groove;
the first front connecting plate is the end part of the front side plate, the first rear connecting plate is the end part of the rear side plate, the overlapping groove is the end part of the mounting groove, and the rib plates are arranged in an extending mode along the length direction of the mounting groove.
Preferably, the upper parts of the first front connecting plate and the first rear connecting plate are both provided with downward extending oblique angles, so that the transverse section of the overlapping groove is trapezoidal;
the upper parts of the second front connecting plate and the second rear connecting plate are respectively provided with a downward extending oblique angle, so that the transverse section of the second connecting part is trapezoidal.
Preferably, the rear longitudinal beam is provided with a scrap, the middle part of the inner side of the threshold is provided with a middle reinforcing rib, and the scrap is lapped on the threshold so that the bottom of the rear longitudinal beam is transversely abutted against the middle reinforcing rib.
As a preferred scheme, the doorsill is provided with a hollow cavity with a square transverse section, and the middle reinforcing rib is arranged in the hollow cavity;
the bottom of the rear longitudinal beam is transversely abutted with the middle reinforcing rib at intervals of the plurality of wall plates.
Preferably, a transverse reinforcing rib fixedly connected with the overlap edge is arranged in the second connecting portion, the overlap edge is lapped on the upper surface of the doorsill, and the transverse reinforcing rib is transversely abutted against a rib plate on the upper surface of the doorsill.
Preferably, the first connecting part and the rear longitudinal beam are connected in a connecting mode of riveting, FDS flow drilling screws and structural adhesive.
An automobile is characterized by comprising a floor beam mounting structure, wherein the floor beam mounting structure is the floor beam mounting structure.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the floor beam mounting structure comprises a floor beam, a rear longitudinal beam and a threshold, wherein the floor beam is connected with the rear longitudinal beam, the rear longitudinal beam is connected with the threshold, the floor beam can be connected with the rear longitudinal beam and the threshold without adopting a stamping transition piece, the weight of an automobile is reduced, and the lightweight design of the automobile is realized; the end part of the floor beam is provided with a first connecting part, the rear longitudinal beam is provided with a second connecting part, and the first connecting part is vertically matched and lapped on the second connecting part, so that the floor beam can be placed on the rear longitudinal beam along the vertical direction; the first connecting part is provided with at least three contact surfaces lapped with the second connecting part, and the bottom of the first connecting part is vertically attached to the bottom of the rear longitudinal beam; and because the bottom of the first connecting part is vertically attached to the bottom of the rear longitudinal beam, at least three contact surfaces are arranged between the first connecting part and the second connecting part, stress on the rear longitudinal beam is directly transmitted to the doorsill after being transmitted to the first connecting part, so that the stress of the floor beam can be directly transmitted to the doorsill through the rear longitudinal beam, the force transmission structure is complete and efficient, and the strength and the rigidity of the installation structure of the floor beam, the rear longitudinal beam and the doorsill are improved.
The utility model discloses a floor crossbeam mounting structure's floor crossbeam can follow the vertical direction and put into on the second connecting portion of back longeron, has avoided the connection form of grafting, simple to operate, and floor crossbeam's bottom surface overlap joint is just right with the threshold after the back longeron, and the power transmission structure is complete and high-efficient, improves the joint strength and the rigidity of car.
Drawings
Fig. 1 is a schematic structural view of a floor cross member mounting structure in an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a schematic structural view of a floor beam;
FIG. 5 is a schematic structural view of the rear side rail;
FIG. 6 is a schematic view of a portion of the structure of FIG. 5;
fig. 7 is a structural view of the threshold.
In the figure, 1, a floor beam; 101. a front side plate; 102. a rear side plate; 103. an upper side plate; 104. a lower side plate; 11. a first connection portion; 111. a first front connecting plate; 112. a first rear connecting plate; 113. a rib plate; 2. a rear stringer; 21. a second connecting portion; 211. a second front connecting plate; 212. a second rear connecting plate; 213. a left connecting plate; 22. lapping; 23. transverse reinforcing ribs; 3. a threshold; 31. and a middle reinforcing rib.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
The utility model discloses a floor crossbeam mounting structure's preferred embodiment, refer to fig. 1-7, the floor crossbeam mounting structure of the utility model includes floor crossbeam 1, back longeron 2 and threshold 3, floor crossbeam 1 is connected with back longeron 2, back longeron 2 is connected with threshold 3, need not adopt the punching press transition piece can be connected floor crossbeam 1 with back longeron 2 and threshold 3, reduced the weight of car, realized the lightweight design of car; when the floor beam is specifically connected, the end part of the floor beam 1 is provided with a first connecting part 11, the rear longitudinal beam 2 is provided with a second connecting part 21, the first connecting part 11 is vertically matched and lapped on the second connecting part 21, namely, the floor beam 1 can be lapped on the rear longitudinal beam 2 from top to bottom along the vertical direction, the first connecting part 11 is matched with the second connecting part 21, and the bottom of the first connecting part 11 is vertically attached to the bottom of the rear longitudinal beam 2; meanwhile, the rear longitudinal beam 2 is provided with a scrap (bridge) 22, the middle part of the inner side of the threshold 3 is provided with a middle reinforcing rib 31, the scrap (bridge) 22 is lapped on the upper surface of the threshold 3, the bottom of the rear longitudinal beam 2 is transversely abutted against the middle reinforcing rib 31, and the bottom of the first connecting part 11 is vertically attached to the bottom of the rear longitudinal beam 2, so that the bottom of the first connecting part 11 is also directly transversely abutted against the middle reinforcing rib 31, the stress of the floor beam 1 can be directly transmitted to the middle reinforcing rib of the threshold 3 through the rear longitudinal beam 2, the force transmission structure is complete and efficient, and the strength and the rigidity of the installation structure of the floor beam 1, the rear longitudinal beam 2 and the threshold 3. The floor beam 1 is lapped on the rear longitudinal beam 2 from top to bottom along the vertical direction, so that the splicing mode adopted in the prior art is avoided, the installation process is improved, and the installation is convenient.
The first connection portion 11 and the rear side member 2 may be connected by a mechanical connection method, such as riveting, FDS drill screw, and a connection method combining with the structural adhesive, and the lap 22 and the threshold 3 may also be connected by a similar mechanical connection method, such as riveting, FDS drill screw, and a connection method combining with the structural adhesive. The welding connection mode is avoided, the connection process can be improved, the production and installation efficiency and the production beat of the automobile are improved, and the automobile capacity is improved.
Wherein, for further improvement back longeron 2 and threshold 3 joint strength, be equipped with in the second connecting portion 21 with overlap 22 fixed connection's horizontal strengthening rib 23, overlap 22 overlap joint is at the upper surface of threshold 3, horizontal butt behind the side of longeron 2 behind the gusset interval of the one end of horizontal strengthening rib 23 and the upper surface of threshold 3, make the power on the floor crossbeam 1 directly transmit to threshold 3 through second connecting portion 21 and overlap 22, further improvement the intensity of connection, the transmission route of power is complete high-efficient, help improving the joint strength of floor crossbeam 1.
Specifically, the second connecting portion 21, the lap 22, and the lateral reinforcing bead 23 of the rear side member 2 of the present application may be integrally formed to ensure the strength requirement of the entire rear side member 2.
Referring to fig. 4, the first connecting portion 11 has at least three contact surfaces overlapping with the second connecting portion 21, the three contact surfaces enable the force transmission between the first connecting portion 11 and the second connecting portion 21 to be more stable, and the force transmission mechanism is more efficient, so as to improve the connection strength of the floor beam 1. In other embodiments of the present application, the number of the contact surfaces may be four or five, and a plurality of contact surfaces may further improve the efficiency of force transmission, strength and rigidity.
Further, first connecting portion 11 includes first preceding connecting plate 111 and first back connecting plate 112 of parallel interval arrangement from front to back, first preceding connecting plate 111 with upper portion between first back connecting plate 112 is equipped with floor 113, floor 113 is connected with first preceding connecting plate 111 and first back connecting plate 112 are fixed or integrated into one piece, first preceding connecting plate 111 and first back connecting plate 112 all set up vertically, floor 113 level is arranged, first preceding connecting plate 111, first back connecting plate 112 and floor 113 form be used for with the overlap joint groove of second connecting portion 21 overlap joint, the opening in overlap joint groove is located the tip of floor crossbeam 1, the bottom in overlap joint groove also sets up to the opening to make first connecting portion 11 put the piece overlap joint on second connecting portion 21 perpendicularly. The second connection portion 21 includes a second front connection plate 211 contacting the first front connection plate 111, a second rear connection plate 212 contacting the first rear connection plate 112, and a left connection plate 213 connected to left sides of the second front connection plate 211 and the second rear connection plate 212, the second front connection plate 211 and the second rear connection plate 212 are also arranged in parallel at a relative interval, the rib plate 113 is vertically attached to top portions of the second front connection plate 211 and the second rear connection plate 212, and a bottom portion of the first connection portion 11 is used for forming a bottom edge of the insertion groove, so that the first front connection plate 111 contacts the second front connection plate 211, the first rear connection plate 112 contacts the second rear connection plate 212, and the rib plate 113 contacts top portions of the second front connection plate 211 and the second rear connection plate 212, so that the first connection portion 11 and the second connection portion 21 have three contact surfaces, which facilitates force transmission.
As shown in fig. 1, the bottom of the first connecting portion 11 abuts against the left connecting plate 213 from left to right; the lap 23 is fixedly arranged at the right sides of the second front connecting plate 211 and the second rear connecting plate 212; the transverse reinforcing rib 23 is arranged between the second front connecting plate 211 and the second rear connecting plate 212, the transverse reinforcing rib 23, the second front connecting plate 211 and the second rear connecting plate 212 are arranged in parallel and vertically, the right end of the transverse reinforcing rib 23 is adjacent to the overlap 22, and when the overlap 22 is lapped on a rib plate on the upper surface of the doorsill 3, the right end of the transverse reinforcing rib 23 is abutted to the rib plate on the upper surface of the doorsill 3 after being spaced from the side edge of the rear longitudinal beam 2.
Further, the transverse length of the first front connecting plate 111 is greater than that of the first rear connecting plate 112, and the transverse length of the first rear connecting plate 112 is greater than that of the bottom of the first connecting portion 11, and as shown in fig. 4, the first front connecting plate 111 and the first rear connecting plate 112 are in an extended ear-shaped structure.
Specifically, in the embodiment of the present application, the first connecting portion 11 is an end portion structure of the floor cross beam 1, and the second connecting portion 21 is integrally formed with the rear longitudinal beam 2, specifically, the floor cross beam 1 includes a front side plate 101 and a rear side plate 102 which are arranged in parallel and spaced from each other in a front-rear direction, and an upper side plate 103 and a lower side plate 104 which are arranged in an up-down opposite spaced manner, and the front side plate 101, the rear side plate 102, the upper side plate 103 and the lower side plate 104 are fixedly enclosed to form a transversely extending installation groove; the first front connecting plate 111 is an end portion of the front side plate 101, the first rear connecting plate 112 is an end portion of the rear side plate 102, the overlapping groove is an end portion of the mounting groove, and the rib plate 113 extends in a length direction of the mounting groove, so that a force applied to the floor cross beam 1 is consistent with a force applied to the first connecting portion 11, and a force transmission path is reduced.
Further, the upper portions of the first front connecting plate 111 and the first rear connecting plate 112 are both provided with downward extending oblique angles, so that the transverse cross section of the overlapping groove is trapezoidal; the upper portions of the second front connecting plate 211 and the second rear connecting plate 212 are all set to oblique angles extending downwards, so that the transverse cross section of the second connecting portion 21 is trapezoidal, the mounting structures of the first connecting portion 11 and the second connecting portion 21 are trapezoidal, the size of the first connecting portion 11 and the size of the second connecting portion 21 can be reduced on the basis of ensuring the mounting and connecting strength, other mounting structures of the rear longitudinal beam 2 and the doorsill 3 can be avoided conveniently, and a larger use space is provided for an automobile. In another embodiment of the present application, the lap groove of the first connection portion 11 may be triangular, rectangular, square, or the like, and the outer contour of the second connection portion 21 may be matched to the lap groove.
Further, as shown in fig. 7, the threshold 3 has a hollow cavity with a square transverse cross section, the middle reinforcing ribs 31 are arranged in the hollow cavity, the number of the middle reinforcing ribs 31 can be two, the two middle reinforcing ribs 31 are crossed, the side wall of the rear longitudinal beam 2 and the outer wall of the threshold 3 are arranged between the bottom of the rear longitudinal beam 2 and the middle reinforcing ribs 31, when the rear longitudinal beam 2 is stressed, the force at the bottom of the rear longitudinal beam 2 is directly transmitted to the transverse reinforcing ribs 31, the force at the bottom of the rear longitudinal beam 2 is conveniently borne by the transverse reinforcing ribs 31, the bearing capacity of the force is improved, and the strength and the rigidity of the structural connection are improved.
The floor beam mounting structure comprises a floor beam 1, a rear longitudinal beam 2 and a threshold 3, wherein the floor beam 1 is connected with the rear longitudinal beam 2, the rear longitudinal beam 2 is connected with the threshold 3, and the floor beam 1 can be connected with the rear longitudinal beam 2 and the threshold 3 without adopting a stamping transition piece, so that the weight of an automobile is reduced, and the lightweight design of the automobile is realized; wherein, the end part of the floor beam 1 is provided with a first connecting part 11, the rear longitudinal beam 2 is provided with a second connecting part 21, the first connecting part 11 is matched and lapped on the second connecting part 21 up and down, so that the bottom of the first connecting part 11 is vertically jointed with the bottom of the rear longitudinal beam 2, meanwhile, the rear longitudinal beam 2 is provided with a scrap (bridge) 22, the middle part of the inner side of the doorsill 3 is provided with a middle reinforcing rib 31, the scrap (bridge) 22 is lapped on the doorsill 3, so that the bottom of the rear longitudinal beam 2 is transversely abutted against the middle reinforcing rib 31, and because the bottom of the first connecting part 11 is vertically jointed with the bottom of the rear longitudinal beam 2, the bottom of the first connecting part 11 is also directly and transversely butted against the middle reinforcing rib 31, so that the stress of the floor beam 1 can be directly transmitted to the middle reinforcing rib 31 of the threshold 3 through the rear longitudinal beam 2, the force transmission structure is complete and efficient, and the strength and the rigidity of the installation structure of the floor beam 1, the rear longitudinal beam 2 and the threshold 3 are improved.
The utility model discloses a floor crossbeam mounting structure's floor crossbeam 1 can follow the vertical direction and put into the second connecting portion 21 of back longeron 2 on, has avoided the connected form of grafting, simple to operate, and floor crossbeam 1's bottom surface overlap joint is just right with threshold 3 after back longeron 2, and the force transmission structure is complete and high-efficient, improves the joint strength and the rigidity of car.
An automobile comprises the floor cross beam mounting structure.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (10)
1. A floor beam mounting structure is characterized by comprising a floor beam, a rear longitudinal beam and a threshold, wherein the floor beam is connected with the rear longitudinal beam, and the rear longitudinal beam is connected with the threshold;
the floor beam comprises a floor beam and is characterized in that a first connecting part is arranged at the end part of the floor beam, a second connecting part is arranged on the rear longitudinal beam, the first connecting part is in lap joint with the second connecting part from top to bottom, at least three contact surfaces are formed by the first connecting part and the second connecting part in lap joint, and the bottom of the first connecting part is attached to the bottom of the rear longitudinal beam.
2. The floor crossmember mounting structure according to claim 1, wherein the first connecting portion includes a first front connecting plate and a first rear connecting plate arranged in parallel and spaced front and rear, a rib plate is provided at an upper portion between the first front connecting plate and the first rear connecting plate, and the first front connecting plate, the first rear connecting plate, and the rib plate form a lap joint groove that overlaps with the second connecting portion;
the second connecting portion include with the preceding connecting plate of second of first preceding connecting plate contact, with the connecting plate behind the second of first back connecting plate contact, and connect before the second connecting plate with the left connecting plate of connecting plate behind the second, the laminating is in from top to bottom in the floor the preceding connecting plate of second with the top of connecting plate behind the second, butt is in about the bottom of first connecting portion on the left connecting plate.
3. The floor cross member mounting structure according to claim 2, wherein the first front connecting plate has a lateral length greater than that of the first rear connecting plate, and the first rear connecting plate has a lateral length greater than that of the bottom of the first connecting portion.
4. The floor beam mounting structure of claim 2 wherein said floor beam includes front and rear spaced apart front and rear opposed parallel plates and upper and lower spaced apart upper and lower plates, said front, rear, upper and lower plates forming transversely extending mounting slots;
the first front connecting plate is the end part of the front side plate, the first rear connecting plate is the end part of the rear side plate, the overlapping groove is the end part of the mounting groove, and the rib plates are arranged in an extending mode along the length direction of the mounting groove.
5. The floor cross member mounting structure according to claim 2, wherein upper portions of the first front connecting plate and the first rear connecting plate are each provided with a downwardly extending bevel so that a transverse section of the lap joint groove is trapezoidal;
the upper parts of the second front connecting plate and the second rear connecting plate are respectively provided with a downward extending oblique angle, so that the transverse section of the second connecting part is trapezoidal.
6. The floor cross member mounting structure according to claim 1, wherein the rear side member has a bead, and a middle portion inside the rocker has a middle bead, and the bead is lapped on the rocker so that a bottom portion of the rear side member laterally abuts against the middle bead.
7. The floor cross member mounting structure according to claim 6, wherein the rocker has a hollow cavity having a square cross section, the intermediate reinforcing rib being provided in the hollow cavity;
the bottom of the rear longitudinal beam is transversely abutted with the middle reinforcing rib at intervals of the plurality of wall plates.
8. The floor cross member mounting structure according to claim 6, wherein a transverse reinforcing rib fixedly connected to the lap is provided in the second connecting portion, the lap is lapped on an upper surface of the rocker, and the transverse reinforcing rib is in transverse abutment with a rib plate on the upper surface of the rocker.
9. The floor cross member installation structure of any one of claims 1 to 8, wherein the first connection portion is connected to the rear side member by riveting, FDS flow drilling screw and structural adhesive.
10. An automobile characterized by comprising a floor cross member mounting structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021175840.9U CN213008406U (en) | 2020-06-22 | 2020-06-22 | Floor crossbeam mounting structure and car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021175840.9U CN213008406U (en) | 2020-06-22 | 2020-06-22 | Floor crossbeam mounting structure and car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213008406U true CN213008406U (en) | 2021-04-20 |
Family
ID=75497190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021175840.9U Active CN213008406U (en) | 2020-06-22 | 2020-06-22 | Floor crossbeam mounting structure and car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213008406U (en) |
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2020
- 2020-06-22 CN CN202021175840.9U patent/CN213008406U/en active Active
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