CN217316120U - Slitting equipment for non-ferrous metal strips - Google Patents
Slitting equipment for non-ferrous metal strips Download PDFInfo
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- CN217316120U CN217316120U CN202221019734.0U CN202221019734U CN217316120U CN 217316120 U CN217316120 U CN 217316120U CN 202221019734 U CN202221019734 U CN 202221019734U CN 217316120 U CN217316120 U CN 217316120U
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- burr
- ferrous metal
- slitting
- metal strip
- cut
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Abstract
The utility model provides a non ferrous metal strip slitting equipment, which comprises two slitting cutter shafts and at least one shearing mechanism which are arranged in parallel, wherein each shearing mechanism comprises a male cutter and a female cutter which can be mutually sheared and matched, the male cutter in each shearing mechanism is fixedly arranged on any one slitting cutter shaft, and the female cutter is fixedly arranged on the other slitting cutter shaft; the nonferrous metal strip to be cut is cut by passing between the two cutting knife shafts; at least one set of deburring press roll device is arranged on the discharge side of the two slitting cutter shafts, each set of deburring press roll device comprises a steering roll and a burr press roll, the slit nonferrous metal strip passes through the space between the steering roll and the burr press roll, and the shearing burrs on the slit nonferrous metal strip face the burr press roll; and a linear speed difference exists between the cut aluminum alloy strip and the burr pressing roller. The utility model discloses can effectively get rid of the shearing burr of cutting on the coiled material.
Description
Technical Field
The utility model relates to a non ferrous metal field especially relates to a non ferrous metal strip cut equipment.
Background
Due to the structural advantages of the blade battery, the hot runaway possibly occurring in the traditional power battery during the needling penetration test is thoroughly eliminated, the safety standard of a new energy automobile is redefined, and the safety new altitude of the global power battery is led. However, the blade type battery shell also puts a strict requirement on the product quality of the aluminum alloy coiled material for manufacturing the blade type battery shell, and puts a stricter requirement on the control of the trimming quality (camber and trimming burrs) of the aluminum alloy coiled material after slitting besides general mechanical performance and surface quality, and particularly the welding quality and air tightness of the aluminum alloy coiled material after forming are influenced by the burrs after slitting. The existing non-ferrous metal coil slitting production line generally comprises an uncoiler, an uncoiling tensioning roller mechanism, slitting equipment and a coiler which are sequentially arranged along the production line direction. The aluminum alloy slitting coil manufactured by the existing nonferrous metal coil slitting production line often has tiny burrs which are usually ignored but cannot meet the requirement of the blade battery on the edge slitting quality. Therefore, a solution for solving the above-mentioned problem of micro burrs of the slit aluminum alloy coil is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a non ferrous metal strip cut equipment, it can effectively get rid of the shearing burr on non ferrous metal (especially aluminum alloy) cuts the coiled material, satisfies the blade battery and cuts the requirement of coiled material side cut quality to the aluminum alloy.
A non-ferrous metal strip slitting device comprises two slitting cutter shafts and at least one shearing mechanism which are arranged in parallel, wherein each shearing mechanism comprises a male cutter and a female cutter which can be mutually sheared and matched, the male cutter in each shearing mechanism is fixedly arranged on any one of the two slitting cutter shafts, and the female cutter is fixedly arranged on the other slitting cutter shaft;
the non-ferrous metal strip to be cut passes through the two cutting knife shafts and is cut under the shearing cooperation of the male knife and the female knife;
at least one set of deburring press roll device is arranged on the discharge side of the two slitting cutter shafts, each set of deburring press roll device comprises a steering roll and a burr press roll which are arranged in parallel and mutually matched in a rolling way, the slit nonferrous metal strip passes through the steering roll and the burr press roll, and the shearing burrs on the nonferrous metal strip face the burr press roll;
and a linear speed difference exists between the cut aluminum alloy strip and the burr pressing roller.
The non-ferrous metal strip to be cut is cut under the shearing cooperation of the male knife and the female knife. Due to the axial clearance between the male knife and the female knife, the part to be cut of the nonferrous metal strip to be cut can be torn along the cutting direction during the cutting process, so that cutting burrs are formed. The surface of the cut non-ferrous metal strip with the cutting burrs is the burr surface of the non-ferrous metal strip.
The utility model discloses a discharge side of cutting equipment sets up the steering roll, and the non ferrous metal strip after cutting drives the steering roll and rotates under the effect of batching tension, and the non ferrous metal strip after cutting is in by the steering roll with keep the shearing burr orientation on it when passing between the burr compression roller, in addition, the aluminum alloy strip after cutting with have the line speed difference between the burr compression roller for the non ferrous metal strip after cutting is following steering roll and corresponding shearing burr on its burr face can be in when passing between the burr compression roller carry out the grinding under the frictional action of the roll surface of burr compression roller and get rid of.
Preferably, the linear speed difference between the cut aluminum alloy strip and the burr pressing roller is larger than 0, so that the phenomenon that the scraped burrs splash towards the running front of the strip to influence the tensioning and rolling of the strip after the burrs are removed is avoided. Further, the linear speed difference between the cut aluminum alloy strip and the burr pressing roller is not less than 15%, namely (the running speed of the cut aluminum alloy strip-the linear speed of the burr pressing roller)/the linear speed of the burr pressing roller is not less than 15%.
Preferably, the steering roller is driven by a non-ferrous metal strip to synchronously rotate, a first gear is fixedly sleeved at any shaft end of the steering roller, a second gear meshed with the first gear is fixedly sleeved at the shaft end of the burr pressing roller, and the number of teeth of the first gear is equal to that of the second gear; the outer diameter of the burr pressing roller is unequal to that of the steering roller, so that a linear speed difference is formed between the cut nonferrous metal strip and the burr pressing roller, and the burr pressing roller is simple in structure and convenient to install. In the specific implementation process, the outer diameter of the burr pressing roller is smaller than that of the steering roller, so that the linear speed difference between the cut aluminum alloy strip and the burr pressing roller is larger than 0. Further, (the linear speed of the steering roller-the linear speed of the burr pressing roller)/the linear speed of the burr pressing roller is more than or equal to 15 percent.
When the number of the shearing mechanisms is more than or equal to two, the shearing mechanisms are arranged at intervals along the axial direction of the slitting cutter shafts, and the male cutters and the female cutters are sequentially and alternately arranged on each slitting cutter shaft. The shearing burrs at the shearing edges on the two sides of the cut nonferrous metal strip are in the same direction, so that the two sides of the cut nonferrous metal strip are shearing edges, and the shearing burrs at the shearing edges on the two sides of the cut nonferrous metal strip can be removed together by only adopting one set of deburring compression roller device.
Preferably, the steering roller and the slitting knife shaft are arranged in parallel, so that the non-ferrous metal strips after slitting can be smoothly carried to the corresponding steering roller, and the uniform transverse tension is ensured.
The number of deburring roller sets is preferably two. The shearing burr orientation that produces after cutting is one of them all of the back non ferrous metal strips of cutting of branch cutter shaft are as the back non ferrous metal strips of first group cutting, and the shearing burr orientation that produces after cutting is another all of the back non ferrous metal strips of cutting of branch cutter shaft are as the back non ferrous metal strips of second group cutting, the back non ferrous metal strips of first group cutting all passes through one of them burring compression roller device, the back non ferrous metal strips of second group cutting all passes through another burring compression roller device realizes carrying out categorised rolling to two kinds of back non ferrous metal strips of cutting that the shearing burr orientation is different. Furthermore, two burring compression roller device is separated non ferrous metal strip both sides setting, and first kind of non ferrous metal strip after cutting and second kind of non ferrous metal strip after cutting part to both sides respectively, avoid alternately, and the overall arrangement is more reasonable.
Preferably, a surface pressing roller and a winding machine are sequentially arranged on the discharge side of each deburring pressing roller device along the running direction of the non-ferrous metal strips, and the cut non-ferrous metal strips are S-shaped and sequentially tensioned to pass around the steering rollers of the deburring pressing roller devices, the corresponding surface pressing rollers and wind the corresponding reel outer sleeves of the winding machine to realize winding. The shearing burrs on the cut nonferrous metal strip pass through the surface pressing roller and face the surface pressing roller, and under the rolling action of the self tension of the cut nonferrous metal strip and the surface pressing roller, the planeness of the burr surface of the cut nonferrous metal strip is improved, and further the planeness of coiling is improved.
Preferably, shaft seats are respectively arranged at two shaft ends of each slitting cutter shaft, and each slitting cutter shaft is erected between two corresponding shaft seats; and the two shaft seats corresponding to one of the cutting knife shafts and the two shaft seats corresponding to the other cutting knife shaft move relatively to realize the shearing matching of the male knife and the female knife.
Preferably, the burr pressing roller is a floating roller. Specifically, the burr compression roller is transversely arranged between two racks, a cylinder seat is fixedly arranged on each rack at two shaft ends of the burr compression roller, a cylinder is vertically arranged above each cylinder seat, a piston rod of each cylinder is arranged upwards, a universal ball is arranged at the free end of each piston rod of each cylinder in a butt joint mode, and two shaft ends of the burr compression roller are respectively arranged in the corresponding universal ball.
Preferably, each burr compression roller is of a hollow roller structure, and the burr compression roller is a steel sleeve coated with a chromium layer on the outer peripheral surface. Specifically, a mandrel is coaxially arranged at each of two ends of the roller body of the burr pressing roller through a rolling bearing, and the outer shaft end of the mandrel is arranged in the universal ball.
Drawings
Fig. 1 is a schematic front view of a slitting apparatus for non-ferrous metal strip according to the present invention, wherein the direction indicated by the arrow on the non-ferrous metal strip is the running direction of the non-ferrous metal strip; the arrow on the winder spool indicates the rotation direction of the winder spool;
fig. 2 is a schematic top view of the two-split cutter shaft of the present invention;
FIG. 3 is a schematic diagram showing the distribution of the cut burrs on the non-ferrous metal strip after the non-ferrous metal strip is cut by two adjacent cutting mechanisms of the present invention;
fig. 4 is a left or right side schematic structure diagram of the deburring roller device of the present invention.
Detailed Description
The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown and described.
Use the 3003 aluminum alloy strip of 0.3mm 204.1 specification to cut for the example, adopt the utility model discloses a production is cut to aluminum alloy strip to the equipment of cutting of non ferrous metal strip.
With reference to fig. 1 to fig. 3, the cutting apparatus for non-ferrous metal strip includes two cutting knife shafts (10, 20) and five cutting mechanisms 30 arranged in parallel, each cutting mechanism 30 includes a male knife 31 and a female knife 32 capable of cutting and cooperating with each other, the male knife 31 of each cutting mechanism 30 is fixedly mounted on one of the two cutting knife shafts (10, 20), and the female knife 30 is fixedly mounted on the other cutting knife shaft (20, 10) of the two cutting knife shafts (10, 20);
the aluminum alloy strip 40 to be cut passes through the two cutting knife shafts (10, 20) and is cut under the shearing cooperation of the male knife 10 and the female knife 20;
two sets of deburring press roll devices 50 are arranged on the discharge sides of the two slitting cutter shafts (10 and 20), each set of deburring press roll device 50 comprises a steering roll 51 and a burr press roll 52 which are arranged in parallel and mutually matched in a rolling way, the slit aluminum alloy strip 40 passes between the steering roll 51 and the burr press roll 52, and the shearing burrs 60 on the aluminum alloy strip 40 face the burr press roll 52;
an online speed difference exists between the cut aluminum alloy strip 40 and the burr pressing roller 52;
the shearing mechanisms 30 are arranged at intervals along the axial direction of the slitting cutter shafts (10 and 20), and the male cutters 31 and the female cutters 32 are alternately arranged on each slitting cutter shaft (10 and 20) in sequence;
the number of the deburring press roll devices 50 is two; all the slit aluminum alloy strips with the cutting burrs 60 generated after slitting towards one of the slitting cutter shafts 10 are taken as a first group of slit aluminum alloy strips, all the slit aluminum alloy strips with the cutting burrs 60 generated after slitting towards the other slitting cutter shaft 20 are taken as a second group of slit aluminum alloy strips, the first group of slit aluminum alloy strips all pass through one of the deburring roller devices 50, and the second group of slit aluminum alloy strips all pass through the other deburring roller device 50;
every the discharge side of burr compression roller device 50 all has set gradually a compression roller 80 and rolling machine along aluminum alloy strip 40 'S traffic direction, cuts back aluminum alloy strip 40 and is S-shaped tensioning in proper order and walks around burr compression roller device 50 turn to roller 51, correspond face compression roller 80 and coil corresponding realize the rolling on rolling machine' S the spool outer sleeve 90.
When the slitting equipment is used for slitting an aluminum alloy strip, the uncoiled aluminum alloy strip 40 is slit by passing between the two slitting cutter shafts (10 and 20); the slit aluminum alloy strip 40 passes through the turning roll 51 and the deburring press roll 52 of the deburring press roll device 50 and moves forwards;
the two groups of the slit aluminum alloy strips respectively pass through the steering roller 51 and the surface pressing roller 80 of the deburring pressing roller device 50 corresponding to each group in sequence and are wound on the corresponding reel outer sleeve 90 of the winding machine for winding according to the condition that the cutting burrs face the first group of the slit aluminum alloy strips when the one slitting knife shaft 10 faces the one slitting knife shaft 40 and the second group of the slit aluminum alloy strips when the cutting burrs face the other slitting knife shaft 20;
the uncoiling tensile stress and the coiling tensile stress of the aluminum alloy strip 40 in the running process are both controlled to be 12-15% of the yield limit of the aluminum alloy strip 40, and in the embodiment, the uncoiling tensile stress is 22N/mm 2 Tensile coiling stress of 25N/mm 2 。
The equipment of cutting more than adopting, the shearing burr of the both sides shearing limit department of each first group's back aluminum alloy strip 40 of cutting all moves towards unanimously, and the shearing burr of the both sides shearing limit department of each second group's back aluminum alloy strip 40 of cutting all moves towards unanimously, two burring compression roller device 50 just can get rid of in the lump the both sides shearing burr 60 of the back aluminum alloy strip 40 of cutting of corresponding group. The utility model discloses a cut the shearing burr of the aluminum alloy strip after cutting < 0.01mm, satisfy blade battery completely to aluminum alloy material cut side cut quality requirement. And the cut burrs 60 on the cut aluminum alloy strip 40 face the surface pressing roller 80 when the cut aluminum alloy strip passes through the surface pressing roller 80, so that the flatness of the burr surface of the cut aluminum alloy strip 40 is improved under the self-tension of the cut aluminum alloy strip 40 and the rolling action of the surface pressing roller 80, and further the coiling flatness is improved.
Of course, the number of shearing mechanisms 30 can be adjusted according to the width of the aluminum alloy strip to be cut and the width of the aluminum alloy strip after being cut. The number of shearing mechanisms 30 shown may also be one, or ≧ three. In addition, the number of the deburring roller devices 50 is not limited to two, and if only one aluminum alloy strip meeting the requirements is obtained after slitting, only one deburring roller device 50 is needed to convey the aluminum alloy strip meeting the requirements. Of course, when the number of the first group of slit aluminum alloy strips is more than two, the first group of slit aluminum alloy strips may share one deburring roller device 50, or may share different deburring roller devices 50, and similarly, when the number of the second group of slit aluminum alloy strips is more than two, the number of the deburring roller devices 50 is not less than two.
Preferably, the linear speed difference between the slit aluminum alloy strip 40 and the burr pressing roller 52 is greater than 0, so that the scraped burrs are prevented from splashing to the front of the strip in running to influence the tensioning and winding after the burrs are removed. Of course, the linear speed difference between the slit aluminum alloy strip 40 and the burr pressing roller 52 can be less than 0.
Preferably, the turning roll 51 is driven by the slit aluminum alloy strip 40 to synchronously rotate, a first gear 71 is fixedly sleeved at any shaft end of the turning roll 51, a second gear 72 meshed with the first gear 71 is fixedly sleeved at the shaft end of the burr pressing roll 52, and the number of teeth of the first gear 71 is equal to that of the second gear 72; the outer diameter of the burr pressing roller 52 is different from that of the steering roller 51, so that the speed difference between the burr pressing roller 52 and the slit aluminum alloy strip 40 is realized, and the aluminum alloy strip cutting device is simple in structure and convenient to install. The outer diameter of the burr pressing roller 52 is preferably smaller than that of the steering roller 51, so that the speed limit difference between the cut aluminum alloy strip 40 and the burr pressing roller 52 is larger than 0. Further, (the linear speed of the steering roller 51-the linear speed of the burr pressing roller 52)/the linear speed of the burr pressing roller 52 is not less than 15%.
Preferably, as shown in fig. 1, the turning roll 51 is arranged parallel to the slitting knife shafts (10, 20), so that the slit aluminum alloy strip 40 can be smoothly received onto the corresponding turning roll 50, and the uniform transverse tension is also ensured.
Preferably, as shown in fig. 1, the two turning rolls 51 are arranged at two sides of the aluminum alloy strip 40, and the first type of slit aluminum alloy strip and the second type of slit aluminum alloy strip are separated towards two sides respectively, so that intersection is avoided, and the layout is more reasonable.
Preferably, as shown in fig. 2, shaft seats (100, 110) are respectively arranged at two axial ends of each of the branch cutter shafts (10, 20), and each of the branch cutter shafts (10, 20) is erected between the two corresponding shaft seats (100, 110); the two shaft seats 100 corresponding to one of the cutting knife shafts 10 and the two shaft seats 110 corresponding to the other cutting knife shaft 20 move relatively to each other, so that the male knife 31 and the female knife 32 are in shearing fit. In a specific implementation process, as shown in fig. 2, the two shaft seats 100 corresponding to one of the cutter shafts 10 are all fixedly disposed, and a reciprocating driving mechanism capable of driving the two shaft seats 110 to move relative to the two shaft seats 100 corresponding to one of the cutter shafts 10 is disposed outside the two shaft seats 110 corresponding to the other cutter shaft 20. As shown in fig. 2, the reciprocating drive mechanism may be a lead screw and nut mechanism.
Preferably, as shown in fig. 4, the burring pressing roller 52 is a floating roller. Specifically, as shown in fig. 4, the burr pressing roller 52 is transversely disposed between the two frames 120, a cylinder seat 130 is fixedly disposed on each of the frames 120 at two shaft ends of the burr pressing roller 52, a cylinder 140 is vertically disposed above each cylinder seat 130, a piston rod of each cylinder 140 is disposed upward, a free end of the piston rod of each cylinder 140 is butt-jointed with a universal ball 150, and two shaft ends of the burr pressing roller 52 are respectively disposed in one of the universal balls 150 corresponding thereto. Further, as shown in fig. 4, each of the deburring press rolls 51 has a hollow roll structure, and the deburring press roll 51 is a steel sleeve coated with a chromium layer on an outer circumferential surface thereof. Specifically, as shown in fig. 4, a mandrel 160 is coaxially installed at each end of the barrel of the burring pressing roller 51 through a rolling bearing, and the outer shaft end of the mandrel 160 is installed in the universal ball 150. Of course, the burr pressing roller 52 may also be a non-floating roller. However, when the burring pressing roller 52 is a non-floating roller.
Preferably, the linear speed difference between the cut nonferrous metal strip and the burr pressing roller is more than or equal to 15%, namely (the running speed of the cut nonferrous metal strip-the linear speed of the burr pressing roller)/the linear speed of the burr pressing roller is more than or equal to 15%. The utility model discloses a non ferrous metal strip cut equipment not only is applicable to the aluminum alloy, and it is applicable to all non ferrous metal strips.
The utility model discloses right the utility model belongs to the technical field of the ordinary skilled person, do not deviating from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (8)
1. A piece of slitting equipment for non-ferrous metal strips comprises two slitting cutter shafts and at least one shearing mechanism, wherein the two slitting cutter shafts are arranged in parallel, each shearing mechanism comprises a male cutter and a female cutter which can be mutually sheared and matched, the male cutter in each shearing mechanism is fixedly arranged on any one of the two slitting cutter shafts, and the female cutter is fixedly arranged on the other one of the two slitting cutter shafts;
the non-ferrous metal strip to be cut passes through the two cutting knife shafts and is cut under the shearing cooperation of the male knife and the female knife; the method is characterized in that:
at least one set of deburring press roll device is arranged on the discharge side of the two slitting cutter shafts, each set of deburring press roll device comprises a steering roll and a burr press roll which are arranged in parallel and mutually matched in a rolling way, the slit nonferrous metal strip passes through the steering roll and the burr press roll, and the shearing burrs on the nonferrous metal strip face the burr press roll;
and a linear speed difference is formed between the cut aluminum alloy strip and the burr pressing roller.
2. A slitting device for non-ferrous metal strips according to claim 1 wherein: and the linear speed difference between the cut aluminum alloy strip and the burr pressing roller is greater than 0.
3. A slitting device for non-ferrous metal strips according to claim 1 wherein: the turning roll is driven by a non-ferrous metal strip to synchronously rotate, a first gear is fixedly sleeved at any shaft end of the turning roll, a second gear meshed with the first gear is fixedly sleeved at the shaft end of the burr pressing roll, and the number of teeth of the first gear is equal to that of the second gear; the outer diameter of the burr pressing roller is smaller than that of the steering roller.
4. A slitting device for non-ferrous metal strips according to claim 1 wherein: when the number of the shearing mechanisms is more than or equal to two, the shearing mechanisms are arranged at intervals along the axial direction of the slitting cutter shafts, and the male cutters and the female cutters are sequentially and alternately arranged on each slitting cutter shaft.
5. A slitting device for non-ferrous metal strips according to claim 1 wherein: the number of the deburring press roll devices is two; the shearing burr that produces after cutting is towards one of them all cut back non ferrous metal strip as first set of cut back non ferrous metal strip of branch cutter axle, the shearing burr that produces after cutting is towards another all cut back non ferrous metal strip of branch cutter axle is as second set of cut back non ferrous metal strip, first set of cut back non ferrous metal strip all passes through one of them burring compression roller device, second set of cut back non ferrous metal strip all passes through another burring compression roller device.
6. A slitting device for non-ferrous metal strips according to claim 1 wherein: and a surface pressing roller and a winding machine are sequentially arranged on the discharge side of each deburring pressing roller device along the running direction of the non-ferrous metal strip, and the cut non-ferrous metal strip is S-shaped and is sequentially tensioned to bypass the steering roller and the surface pressing roller of the deburring pressing roller device and is wound on the corresponding reel outer sleeve of the winding machine to realize winding.
7. A slitting device for non-ferrous metal strips according to claim 1 wherein: the burr pressing roller is a floating roller; each burr compression roller is a hollow roller structure, and the burr compression roller is a steel sleeve plated with a chromium layer on the outer peripheral surface.
8. A slitting device for non-ferrous metal strips according to claim 2, characterized in that: the linear speed difference between the cut aluminum alloy strip and the burr pressing roller is not less than 15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221019734.0U CN217316120U (en) | 2022-04-29 | 2022-04-29 | Slitting equipment for non-ferrous metal strips |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221019734.0U CN217316120U (en) | 2022-04-29 | 2022-04-29 | Slitting equipment for non-ferrous metal strips |
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| Publication Number | Publication Date |
|---|---|
| CN217316120U true CN217316120U (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221019734.0U Active CN217316120U (en) | 2022-04-29 | 2022-04-29 | Slitting equipment for non-ferrous metal strips |
Country Status (1)
| Country | Link |
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| CN (1) | CN217316120U (en) |
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2022
- 2022-04-29 CN CN202221019734.0U patent/CN217316120U/en active Active
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