CN219591427U - Positive electrode material rolling device for ultralow-temperature lithium ion battery preparation - Google Patents
Positive electrode material rolling device for ultralow-temperature lithium ion battery preparation Download PDFInfo
- Publication number
- CN219591427U CN219591427U CN202320831267.XU CN202320831267U CN219591427U CN 219591427 U CN219591427 U CN 219591427U CN 202320831267 U CN202320831267 U CN 202320831267U CN 219591427 U CN219591427 U CN 219591427U
- Authority
- CN
- China
- Prior art keywords
- groups
- roller
- lithium ion
- ion battery
- positive electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model relates to the technical field of auxiliary devices of rolling equipment, in particular to a positive electrode material rolling device for preparing an ultralow-temperature lithium ion battery ， Which is a kind of Mechanism capable of adjusting gap between rollers of first roller and second roller, thereby enhancing use efficiency and effect of rolling equipment ； The device comprises four groups of supporting legs, a supporting table, a working frame, two groups of conveying tables, a first roller and a second roller, wherein a working cavity is formed in the working frame, the top ends of the four groups of supporting legs are connected with the bottom ends of the supporting table, the left end and the right end of the bottom end of the working frame are respectively connected with the left end and the right end of the top end of the supporting table, the bottom ends of the two groups of conveying tables are connected with the top end of the supporting table, the left end and the right end of the first roller are respectively sleeved with bottom area fastening bearings at the left end and the right end of the working cavity, and lifting mechanisms are arranged at the left end and the right end of the second roller; the lifting mechanism further comprises two groups of fixing plates, two groups of threaded rods, two groups of chain wheels, a first chain, two groups of connecting plates, two groups of lifting plates and a servo motor.
Description
Technical Field
The utility model relates to the technical field of rolling equipment accessory devices, in particular to a positive electrode material rolling device for preparing an ultralow-temperature lithium ion battery.
Background
As is well known, in recent years, due to the advantages of high energy density, high voltage, long cycle and the like, the application of the ultralow temperature lithium ion battery is becoming more and more popular, the positive electrode material is required to be used in the process of producing the ultralow temperature lithium ion battery, the positive electrode material accounts for about 40% of the cost of the lithium ion battery, and in the research and development and production of the positive electrode material, a positive electrode material rolling device for ultralow temperature lithium ion battery preparation is required, the positive electrode material rolling device for ultralow temperature lithium ion battery preparation is a rolling device for the positive electrode material, and the positive electrode material rolling device for ultralow temperature lithium ion battery preparation is widely used in the field of rolling equipment;
when the existing positive electrode material rolling device for preparing the ultralow-temperature lithium ion battery is used, a worker is used for placing the positive electrode material on a conveying table, rolling is carried out through a first roller and a second roller, and the next step is carried out through the conveying table after rolling is finished;
the prior positive electrode material rolling device for ultralow temperature lithium ion battery preparation is found in use, because the gap between the rollers of the first roller and the second roller is not adjustable, only positive electrode materials with fixed sizes can be rolled, the application range is small, and the use efficiency and effect of rolling equipment are reduced, so that the practicability is poor.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a mechanism capable of adjusting the gap between the rollers of the first roller and the second roller, so that the use efficiency and effect of rolling equipment are enhanced, and the practicability is enhanced.
The utility model relates to a positive electrode material rolling device for ultralow temperature lithium ion battery preparation, which comprises four groups of supporting legs, supporting tables, a working frame, two groups of conveying tables, a first roller and a second roller, wherein a working cavity is arranged in the working frame;
the lifting mechanism further comprises two groups of fixing plates, two groups of threaded rods, two groups of chain wheels, a first chain, two groups of connecting plates, two groups of lifting plates and a servo motor, wherein the inner ends of the two groups of fixing plates are respectively connected with the top ends of the left end and the right end of the working frame, the bottom ends of the two groups of threaded rods are respectively sleeved with left end and right end fastening bearings of the top ends of the supporting table, the top ends of the two groups of fixing plates are provided with first through holes, the top areas of the two groups of threaded rods are respectively sleeved with the first through hole fastening bearings of the top ends of the two groups of fixing plates, the bottom ends of the two groups of chain wheels are respectively sleeved with the top ends of the two groups of threaded rods, the two groups of chain wheels are sleeved with the first chain, the middle areas of the left end and the right end of the working cavity are provided with sliding grooves, the inner ends of the two groups of lifting plates are respectively clamped with sliding grooves arranged in the middle areas of the left end and the right end of the working cavity in a sliding manner, the left end and the right end of the second roller are respectively sleeved with inner end middle area fastening bearings of the two groups of lifting plates, the top ends of the two groups of connecting plates are provided with second threaded through holes, the two groups of threaded rods are respectively screwed with the second threaded through holes arranged at the top ends of the two groups of connecting plates, the inner ends of the two groups of connecting plates are respectively connected with the middle parts of the outer ends of the two groups of lifting plates, the top ends of the servo motor are connected with the right end of the bottom end of the supporting table, a sealing rotating bearing of the output end of the servo motor is inserted into the right area of the bottom end of the supporting table, and the output end of the servo motor is connected with the bottom ends of the threaded rods on the right sides of the two groups of the threaded rods.
The utility model relates to a positive electrode material rolling device for ultralow-temperature lithium ion battery preparation, which further comprises a motor shock pad, wherein the motor shock pad is arranged at the top end of a servo motor, and the top end of the motor shock pad is connected with the right side area of the bottom end of a supporting table.
The utility model relates to a positive electrode material rolling device for ultralow-temperature lithium ion battery preparation, which also comprises a motor protection cover, wherein the motor protection cover is arranged at the outer end of a servo motor, and the top end of the motor protection cover is connected with the right side area of the bottom end of a supporting table.
The utility model relates to a positive electrode material rolling device for ultralow-temperature lithium ion battery preparation, which further comprises a portable handle, wherein the top end of the portable handle is connected with the middle part of the bottom end of a motor protection cover.
The utility model relates to a positive electrode material rolling device for ultralow temperature lithium ion battery preparation, which also comprises an anti-slip handle sleeve, wherein the anti-slip handle sleeve is tightly sleeved with the middle part of the bottom end of a portable handle.
The utility model relates to a positive electrode material rolling device for ultralow-temperature lithium ion battery preparation, which further comprises four groups of lifting lugs, wherein the bottom ends of the four groups of lifting lugs are connected with the top end of a supporting table.
The utility model relates to a positive electrode material rolling device for ultralow-temperature lithium ion battery preparation, which also comprises four groups of height threaded rods and four groups of bases, wherein the top ends of the four groups of height threaded rods are respectively connected with the middle parts of the bottom ends of the four groups of supporting legs, and the bottom ends of the four groups of height threaded rods are respectively connected with the top ends of the four groups of bases in a threaded manner.
The utility model relates to a positive electrode material rolling device for ultralow temperature lithium ion battery preparation, which further comprises four groups of anti-slip rubber mats, wherein the top ends of the four groups of anti-slip rubber mats are respectively connected with the bottom ends of the four groups of bases.
Compared with the prior art, the utility model has the beneficial effects that: when using an ultra-low temperature lithium ion battery preparation to roll-in device process with anodal material, the size of the anodal material of roll-in as required, adjust the clearance between the roller, start servo motor, servo motor drives the rotation of the right side threaded rod of two sets of threaded rods, the right side threaded rod of two sets of threaded rods is through driving two sets of sprockets and first chain rotation, thereby drive two sets of threaded rods and rotate, two sets of threaded rods drive two sets of connecting plates and two sets of lifter plates and reciprocate, thereby can drive the second roller and reciprocate, thereby the clearance between the roller has been adjusted, through a mechanism that can adjust the clearance between the roller of first roller and second roller, consequently, the availability factor and the effect of roll-in equipment have been strengthened, thereby the practicality has been strengthened.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the right side view of the present utility model;
FIG. 3 is a schematic diagram of the connection structure of the servo motor and two sets of threaded rods of the present utility model;
FIG. 4 is a schematic view of the connection structure of two sets of sprockets and two sets of threaded rods of the present utility model;
1, four sets of legs; 2. a support table; 3. a work frame; 4. two groups of conveying tables; 5. a first roller; 6. a second roller; 7. a working chamber; 8. two groups of fixing plates; 9. two sets of threaded rods; 10. two sets of sprockets; 11. a first chain; 12. two sets of connecting plates; 13. two sets of lifting plates; 14. a servo motor; 15. a motor damping pad; 16. a motor protection cover; 17. a carrying handle; 18. an anti-slip handle sleeve; 19. four sets of lifting lugs; 20. four sets of height threaded rods; 21. four groups of bases; 22. four sets of anti-skid rubber mats.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
As shown in fig. 1 to 4, the positive electrode material rolling device for preparing the ultralow temperature lithium ion battery comprises four groups of supporting legs 1, a supporting table 2, a working frame 3, two groups of conveying tables 4, a first roller 5 and a second roller 6, wherein a working cavity 7 is arranged in the working frame 3, the top ends of the four groups of supporting legs 1 are connected with the bottom end of the supporting table 2, the left end and the right end of the bottom end of the working frame 3 are respectively connected with the left end and the right end of the top end of the supporting table 2, the bottom ends of the two groups of conveying tables 4 are connected with the top end of the supporting table 2, the left end and the right end of the first roller 5 are respectively sleeved with bottom area fastening bearings at the left end and the right end of the working cavity 7, and the left end and the right end of the second roller 6 are provided with lifting mechanisms;
the lifting mechanism further comprises two groups of fixing plates 8, two groups of threaded rods 9, two groups of chain wheels 10, a first chain 11, two groups of connecting plates 12, two groups of lifting plates 13 and a servo motor 14, wherein the inner ends of the two groups of fixing plates 8 are respectively connected with the top ends of the left and right ends of the working frame 3, the bottom ends of the two groups of threaded rods 9 are respectively sleeved with fastening bearings of the left and right ends of the top end of the supporting table 2, the top ends of the two groups of fixing plates 8 are provided with first through holes, the top areas of the two groups of threaded rods 9 are respectively sleeved with the fastening bearings of the first through holes arranged on the top ends of the two groups of fixing plates 8, the bottom ends of the two groups of chain wheels 10 are respectively sleeved with the top ends of the two groups of threaded rods 9, the two groups of chain wheels 10 are sleeved through the first chain 11, the middle areas of the left and right ends of the working cavity 7 are provided with sliding grooves, the inner ends of the two groups of lifting plates 13 are respectively clamped with sliding grooves arranged in middle areas of the left end and the right end of the working cavity 7 in a sliding manner, the left end and the right end of the second roller 6 are respectively sleeved with inner end middle areas of the two groups of lifting plates 13 in a fastening manner, the top ends of the two groups of connecting plates 12 are provided with second threaded through holes, the two groups of threaded rods 9 are respectively screwed with the second threaded through holes arranged at the top ends of the two groups of connecting plates 12, the inner ends of the two groups of connecting plates 12 are respectively connected with the middle parts of the outer ends of the two groups of lifting plates 13, the top ends of the servo motors 14 are connected with the right ends of the bottom ends of the supporting tables 2, output ends of the servo motors 14 are inserted into the right side areas of the bottom ends of the supporting tables 2 in a sealing manner, and the output ends of the servo motors 14 are connected with the right side threaded rod bottoms of the two groups of the threaded rods 9; when using an ultra-low temperature lithium ion battery preparation to roll-in device process with anodal material, the size of the anodal material of roll-in as required, adjust the clearance between the roller, start servo motor, servo motor drives the rotation of the right side threaded rod of two sets of threaded rods, the right side threaded rod of two sets of threaded rods is through driving two sets of sprockets and first chain rotation, thereby drive two sets of threaded rods and rotate, two sets of threaded rods drive two sets of connecting plates and two sets of lifter plates and reciprocate, thereby can drive the second roller and reciprocate, thereby the clearance between the roller has been adjusted, through a mechanism that can adjust the clearance between the roller of first roller and second roller, consequently, the availability factor and the effect of roll-in equipment have been strengthened, thereby the practicality has been strengthened.
The utility model relates to a positive electrode material rolling device for ultralow temperature lithium ion battery preparation, which further comprises a motor shock pad 15, wherein the top end of a servo motor 14 is provided with the motor shock pad 15, and the top end of the motor shock pad 15 is connected with the right side area of the bottom end of a supporting table 2; the vibration of the servo motor is relieved through the motor shock pad, the service life is prolonged, and therefore the practicability is improved.
The utility model relates to a positive electrode material rolling device for ultralow-temperature lithium ion battery preparation, which further comprises a motor protection cover 16, wherein the motor protection cover 16 is arranged at the outer end of a servo motor 14, and the top end of the motor protection cover 16 is connected with the right side area of the bottom end of a supporting table 2; the damage of sundries to the servo motor is prevented through the motor protection cover, so that the practicability is enhanced.
The utility model relates to a positive electrode material rolling device for ultralow temperature lithium ion battery preparation, which further comprises a hand handle 17, wherein the top end of the hand handle 17 is connected with the middle part of the bottom end of a motor protection cover 16; the protective cover can be conveniently and rapidly moved through the carrying handle, so that the practicability is enhanced.
The utility model relates to a positive electrode material rolling device for ultralow temperature lithium ion battery preparation, which further comprises an anti-slip handle sleeve 18, wherein the anti-slip handle sleeve 18 is tightly sleeved with the middle part of the bottom end of a handle 17; the friction force between the handle and the palm can be increased through the anti-slip handle sleeve, so that the slipping is prevented, and the practicability is enhanced.
The utility model relates to a positive electrode material rolling device for ultralow-temperature lithium ion battery preparation, which further comprises four groups of lifting lugs 19, wherein the bottom ends of the four groups of lifting lugs 19 are connected with the top end of a supporting table 2; the equipment can be conveniently and rapidly moved through the four groups of lifting lugs, so that the practicability is enhanced.
The utility model relates to a positive electrode material rolling device for ultralow temperature lithium ion battery preparation, which also comprises four groups of height threaded rods 20 and four groups of bases 21, wherein the top ends of the four groups of height threaded rods 20 are respectively connected with the middle parts of the bottom ends of the four groups of supporting legs 1, and the bottom ends of the four groups of height threaded rods 20 are respectively in threaded connection with the top ends of the four groups of bases 21; the supporting table can be more stable by adjusting proper heights through rotating the four groups of bases, so that the practicability is enhanced.
The utility model relates to a positive electrode material rolling device for ultralow temperature lithium ion battery preparation, which further comprises four groups of anti-slip rubber mats 22, wherein the top ends of the four groups of anti-slip rubber mats 22 are respectively connected with the bottom ends of four groups of bases 21; the friction force between the four groups of bases and the ground is increased through the four groups of anti-skid rubber mats, so that the practicability is enhanced.
The utility model relates to a positive electrode material rolling device for ultralow temperature lithium ion battery preparation, which is characterized in that before the above actions are completed in working, the positive electrode material rolling device is firstly moved to a position required by a user, when the positive electrode material rolling device for ultralow temperature lithium ion battery preparation is used, the gap between rollers is regulated according to the size of positive electrode materials required to be rolled, a servo motor is started, the servo motor drives the right threaded rods of two groups of threaded rods to rotate, the right threaded rods of the two groups of threaded rods drive the two groups of chain wheels and a first chain to rotate, so that the two groups of threaded rods drive the two groups of connecting plates and the two groups of lifting plates to move up and down, so that a second roller can be driven to move up and down, the gap between rollers is regulated, then the rollers are rolled through the first roller and the second roller, and the next step is carried out through a conveying table after the rolling is finished.
The positive electrode material rolling device for ultralow-temperature lithium ion battery preparation, provided by the utility model, has the advantages that the installation mode, the connection mode or the setting mode are all common mechanical modes, and the positive electrode material rolling device can be implemented as long as the beneficial effects can be achieved.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.
Claims (8)
1. The utility model provides a positive pole material roll-in device for ultralow temperature lithium ion battery preparation, including four sets of landing legs (1), brace table (2), work frame (3), two sets of delivery tables (4), first roller (5) and second roller (6), work cavity (7) are provided inside work frame (3), four sets of landing legs (1) top all are connected with brace table (2) bottom, the both ends about the work frame (3) bottom are connected with the both ends about brace table (2) top respectively, two sets of delivery tables (4) bottom are connected with brace table (2) top, first roller (5) both ends about with the bottom regional fastening bearing suit of both ends about work cavity (7) respectively, both ends are provided with elevating system about second roller (6);
the lifting mechanism is characterized by further comprising two groups of fixing plates (8), two groups of threaded rods (9), two groups of chain wheels (10), a first chain (11), two groups of connecting plates (12), two groups of lifting plates (13) and a servo motor (14), wherein the inner ends of the two groups of fixing plates (8) are respectively connected with the top ends of the left and right ends of the working frame (3), the bottom ends of the two groups of threaded rods (9) are respectively sleeved with fastening bearings at the left and right ends of the top end of the supporting table (2), the top ends of the two groups of fixing plates (8) are provided with first through holes, the top areas of the two groups of threaded rods (9) are respectively sleeved with the fastening bearings at the first through holes arranged at the top ends of the two groups of fixing plates (8), the bottom ends of the two groups of chain wheels (10) are respectively sleeved with the top ends of the two groups of threaded rods (9), the two groups of chain wheels (10) are sleeved through a first chain (11), the middle areas of the left end and the right end of the working cavity (7) are provided with sliding grooves, the inner ends of the two groups of lifting plates (13) are respectively clamped with the sliding grooves arranged in the middle areas of the left end and the right end of the working cavity (7), the left end and the right end of the second roller (6) are respectively sleeved with the middle areas of the inner ends of the two groups of lifting plates (13) by fastening bearings, the top ends of the two groups of connecting plates (12) are provided with second threaded through holes, the two groups of threaded rods (9) are respectively screwed with the second threaded through holes arranged at the top ends of the two groups of connecting plates (12), the inner ends of the two groups of connecting plates (12) are respectively connected with the middle parts of the outer ends of the two groups of lifting plates (13), the top end of the servo motor (14) is connected with the right end of the bottom end of the supporting table (2), a sealing rotating bearing at the output end of the servo motor (14) is inserted into the right side area of the bottom end of the supporting table (2), and the output end of the servo motor (14) is connected with the bottom ends of the right threaded rods of the two groups of threaded rods (9).
2. The positive electrode material rolling device for ultralow-temperature lithium ion battery preparation according to claim 1, further comprising a motor shock pad (15), wherein the motor shock pad (15) is arranged at the top end of the servo motor (14), and the top end of the motor shock pad (15) is connected with the right side area of the bottom end of the supporting table (2).
3. The positive electrode material rolling device for ultralow-temperature lithium ion battery preparation according to claim 2, further comprising a motor protection cover (16), wherein the motor protection cover (16) is arranged at the outer end of the servo motor (14), and the top end of the motor protection cover (16) is connected with the right side area of the bottom end of the supporting table (2).
4. A positive electrode material rolling device for ultralow temperature lithium ion battery preparation as claimed in claim 3, further comprising a carrying handle (17), wherein the top end of the carrying handle (17) is connected with the middle part of the bottom end of the motor protection cover (16).
5. The positive electrode material rolling device for ultralow temperature lithium ion battery preparation according to claim 4, further comprising an anti-slip handle sleeve (18), wherein the anti-slip handle sleeve (18) is tightly sleeved with the middle of the bottom end of the carrying handle (17).
6. The positive electrode material rolling device for ultralow-temperature lithium ion battery preparation according to claim 5, further comprising four groups of lifting lugs (19), wherein the bottom ends of the four groups of lifting lugs (19) are connected with the top end of the supporting table (2).
7. The positive electrode material rolling device for ultralow-temperature lithium ion battery preparation according to claim 6, further comprising four groups of height threaded rods (20) and four groups of bases (21), wherein the top ends of the four groups of height threaded rods (20) are respectively connected with the middle parts of the bottom ends of the four groups of supporting legs (1), and the bottom ends of the four groups of height threaded rods (20) are respectively connected with the top ends of the four groups of bases (21) in a threaded manner.
8. The positive electrode material rolling device for ultralow temperature lithium ion battery preparation according to claim 7, further comprising four groups of anti-slip rubber mats (22), wherein the top ends of the four groups of anti-slip rubber mats (22) are respectively connected with the bottom ends of the four groups of bases (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320831267.XU CN219591427U (en) | 2023-04-14 | 2023-04-14 | Positive electrode material rolling device for ultralow-temperature lithium ion battery preparation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320831267.XU CN219591427U (en) | 2023-04-14 | 2023-04-14 | Positive electrode material rolling device for ultralow-temperature lithium ion battery preparation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219591427U true CN219591427U (en) | 2023-08-25 |
Family
ID=87690649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320831267.XU Active CN219591427U (en) | 2023-04-14 | 2023-04-14 | Positive electrode material rolling device for ultralow-temperature lithium ion battery preparation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219591427U (en) |
-
2023
- 2023-04-14 CN CN202320831267.XU patent/CN219591427U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109202597B (en) | Edging device for preparing wooden floor | |
| CN206738124U (en) | Refrigeration compressor convenient to remove | |
| CN219591427U (en) | Positive electrode material rolling device for ultralow-temperature lithium ion battery preparation | |
| CN214273057U (en) | Assembled building construction strutting arrangement | |
| CN209754781U (en) | Aluminum alloy window frame corner grinding device | |
| CN210578021U (en) | Hidden frame of generator | |
| CN206979443U (en) | A kind of sweeper for being easy to storage | |
| CN209941176U (en) | Drawing frame for flax spinning | |
| CN213649655U (en) | Device convenient to office furniture cabinet removes | |
| CN210339482U (en) | Conveying assembly for leather | |
| CN220267578U (en) | Storage battery elevator | |
| CN210637701U (en) | Fixing device for air filter | |
| CN108715025A (en) | A kind of protection film for automobile pad-pasting fixture | |
| CN206279215U (en) | A kind of leather draw-gear of shoemaking | |
| CN213054170U (en) | Wood grinding machine convenient to move | |
| CN216889963U (en) | Lifting device convenient to move for construction equipment | |
| CN211194082U (en) | PVC tubular product sawing clamping platform device | |
| CN219175807U (en) | Interior decoration scaffold convenient to adjust | |
| CN221756930U (en) | Lithium battery electrode plate rolling device | |
| CN213351858U (en) | Edging machine for glass processing | |
| CN221070795U (en) | Hanging device for injection mold production | |
| CN213931546U (en) | Movable wheel type air energy heat pump unit | |
| CN218284967U (en) | Green processing apparatus that sprays paint of surface for case and bag injection molding | |
| CN221720414U (en) | Transfer device for lifting engineering machinery | |
| CN221371850U (en) | Construction frame |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |