CN217832263U - Whole case laser welding frock of lithium ion power battery system - Google Patents
Whole case laser welding frock of lithium ion power battery system Download PDFInfo
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- CN217832263U CN217832263U CN202221092499.XU CN202221092499U CN217832263U CN 217832263 U CN217832263 U CN 217832263U CN 202221092499 U CN202221092499 U CN 202221092499U CN 217832263 U CN217832263 U CN 217832263U
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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 discloses a whole-box laser welding tool of a lithium ion power battery system, which relates to the field of laser welding.A clamping device comprises a first supporting column and a second supporting column which are arranged oppositely, a first cylinder is arranged between a first extrusion block and the first supporting column, and a second cylinder is arranged between a second extrusion block and the second supporting column; one end of the first support column, which faces the first transmission rod, is connected with a first sliding block, and the first transmission rod penetrates through the first sliding block; one end of the second support column, which faces the second transmission rod, is connected with a second sliding block, and the second transmission rod penetrates through the second sliding block; the conveyer belt is located between first transfer line and the second transfer line, and the extending direction of conveyer belt is the same with the extending direction of first transfer line. Clamping device can change the position and the height of battery box to can realize accurate location, prevent to appear because welding deformation, the battery box inflation problem that manufacturing error of positioning error or battery itself caused in welding process.
Description
Technical Field
The utility model relates to a laser welding field, specifically speaking relates to a whole case laser welding frock of lithium ion power battery system.
Background
Nowadays, new energy automobiles are more and more emphasized, and people pay more and more attention to the safety of a heart-power battery system of the new energy automobiles in order to improve the reliability and the safety of the automobiles.
The battery case serves as a barrier for protecting the battery module and the electronic components in the battery system, and the battery case is often assembled by welding when the battery system is assembled, in order to facilitate the installation of the battery module and the electronic components. However, in the welding process, if the location is inaccurate, the problem of deformation expansion can appear in the welded box, and this can lead to the battery box to become irregular for the inside battery module of battery box can't match with the battery box, thereby causes the influence to the fixing of battery module.
Disclosure of Invention
To above defect, the utility model aims at providing a whole case laser welding frock of lithium ion power battery system aims at solving among the prior art problem that the deformation inflation appears when the inaccurate welding that leads to in battery box location.
In order to solve the technical problem, the technical scheme of the utility model is that:
the whole box laser welding tool for the lithium ion power battery system comprises a laser welding device, a clamping device and a feeding device, wherein the clamping device comprises a first supporting column and a second supporting column which are oppositely arranged, a first extrusion block is arranged on one surface, facing the second supporting column, of the first supporting column, a second extrusion block is arranged on one surface, facing the first supporting column, of the second supporting column, a first air cylinder is arranged between the first extrusion block and the first supporting column, and a second air cylinder is arranged between the second extrusion block and the second supporting column; the clamping device further comprises a first transmission rod and a second transmission rod, one end of the first transmission rod is close to the laser welding device, the other end of the first transmission rod extends in the direction far away from the laser welding device, and the second transmission rod is parallel to the first transmission rod; one end, facing the first transmission rod, of the first support column is connected with a first sliding block, the first transmission rod penetrates through the first sliding block, and the first sliding block moves along the first transmission rod; one end, facing the second transmission rod, of the second support column is connected with a second sliding block, the second transmission rod penetrates through the second sliding block, and the second sliding block moves along the second transmission rod; the feeding device comprises a conveying belt and a driving device for driving the conveying belt to rotate, the conveying belt is located between the first transmission rod and the second transmission rod, and the extending direction of the conveying belt is the same as that of the first transmission rod.
The first support column comprises a first sliding groove, the first sliding groove is formed by the fact that one surface, facing the second support column, of the first support column is recessed towards one surface, facing the second support column, of the first support column, the surface, far away from the second support column, of the first support column, one end of the first sliding groove faces the first sliding block, the other end of the first sliding groove extends towards the direction far away from the first sliding block, and the first air cylinder is connected with the first sliding groove in a sliding mode; the second support column includes the second spout, the second spout is kept away from the one side sunken formation of first support column by the second support column towards the second support column by the one side of first support column, the one end of second spout extends to the direction of keeping away from the second sliding block towards the second sliding block, the other end of second spout, second cylinder and second spout sliding connection.
Wherein, still include first power module, first lead screw and first stopper, first power module is located the one end that first sliding block was kept away from to first support column, the outer wall of first lead screw is provided with the external screw thread, first stopper is including having the first spacing hole of internal screw thread, first lead screw and first spacing hole threaded connection, the one end and the first power module of first lead screw rotate to be connected, and the other end and the first sliding block of first lead screw rotate to be connected, first stopper slides and sets up in first spout, first cylinder is connected towards the one side of second support column with first stopper.
Wherein, still include second power module, second lead screw and second stopper, second power module is located the one end that the second sliding block was kept away from to the second support column, the outer wall of second lead screw is provided with the external screw thread, the second stopper is including having the spacing hole of internal screw thread second, the spacing threaded connection in hole of second lead screw and second, the one end and the second power module of second lead screw rotate to be connected, and the other end and the second sliding block of second lead screw rotate to be connected, the second cylinder is connected with the one side of second stopper orientation first support column.
The device comprises a first air cylinder, a first extrusion block, a second air cylinder, a second extrusion block, a second motor and a motor, wherein the first motor is arranged between the first air cylinder and the first extrusion block, the first extrusion block is rotatably connected with the first motor, the second motor is arranged between the second air cylinder and the second extrusion block, and the second extrusion block is rotatably connected with the second motor.
Wherein, still include first power device and second power device, the one end that first transfer line is close to laser welding device rotates with first power device to be connected, and the other end of first transfer line is connected with first fixed block, the one end that the second transfer line is close to laser welding device rotates with second power device to be connected, the other end of second transfer line is connected with the second fixed block, first transfer line all is provided with the external screw thread with the second transfer line, first sliding block is including having the first locating hole of internal screw thread, the second sliding block is including having the second locating hole of internal screw thread, first transfer line and first locating hole threaded connection, second transfer line and second locating hole threaded connection.
Wherein, still include the gag lever post, the gag lever post is located the conveyer belt and is connected towards one side of first sliding block, the one end and the first transfer line of gag lever post are connected towards the one end of laser welding device, and the other end of gag lever post extends to the second transfer line.
The device comprises a laser welding device, a transparent explosion-proof cover, a clamping device and a feeding device, wherein the device further comprises a supporting cabinet, the transparent explosion-proof cover is arranged at one end, facing the laser welding device, of the supporting cabinet, and the laser welding device, the clamping device and the feeding device are all located in the explosion-proof cover.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
clamping device among this technical scheme can change the position and the height of battery box to can realize accurate location, prevent to appear because welding deformation, the bloated problem of battery box that positioning error or battery manufacturing error itself caused in welding process.
Drawings
FIG. 1 is a structural diagram of a whole box laser welding tool of a lithium ion power battery system;
FIG. 2 is a top view of the clamping device;
FIG. 3 is a cross-sectional view of the clamping device;
fig. 4 is a structural view of the drive screw.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The position that involves in this specification all uses the utility model relates to a position of lithium ion power battery system whole case laser welding frock when normally working is accurate, does not restrict its storage and position when transporting, only represents relative position relation, does not represent absolute position relation.
As shown in fig. 1-4, a whole-box laser welding tool for a lithium ion power battery system comprises a laser welding device 101, a clamping device 102 and a feeding device 103, wherein the clamping device 102 comprises a first supporting column 104 and a second supporting column 105 which are oppositely arranged, a first extrusion block 106 is arranged on one surface of the first supporting column 104 facing the second supporting column 105, a second extrusion block 107 is arranged on one surface of the second supporting column 105 facing the first supporting column 104, a first cylinder 108 is arranged between the first extrusion block 106 and the first supporting column 104, and a second cylinder 109 is arranged between the second extrusion block 107 and the second supporting column 105; the clamping device 102 further comprises a first transmission rod 110 and a second transmission rod 111, one end of the first transmission rod 110 is close to the laser welding device 101, the other end of the first transmission rod 110 extends in a direction away from the laser welding device 101, and the second transmission rod 111 is parallel to the first transmission rod 110; a first sliding block 112 is connected to one end of the first support column 104 facing the first transmission rod 110, the first transmission rod 110 passes through the first sliding block 112, and the first sliding block 112 moves along the first transmission rod 110; one end of the second support column 105 facing the second transmission rod 111 is connected with a second sliding block 113, the second transmission rod 111 passes through the second sliding block 113, and the second sliding block 113 moves along the second transmission rod 111; the feeding device 103 comprises a conveyor belt 114 and a driving device 115 for driving the conveyor belt to rotate, the conveyor belt 114 is located between the first transmission rod 110 and the second transmission rod 111, and the extension direction of the conveyor belt 114 is the same as the extension direction of the first transmission rod 110. In order to avoid the problem that the battery box body cannot be accurately positioned due to the influence of factors such as errors, vibration and position deviation, and further welding errors occur in the welding process of the battery box body, the clamping device 102 capable of adjusting the position accuracy of the battery box body is introduced. The first air cylinder 108 of the clamping device 102 pushes the first pressing block 106 to move towards the second supporting column 105, and the second air cylinder 109 pushes the second pressing block 107 to move towards the first supporting column 104, when the battery box body is located between the first pressing block 106 and the second pressing block 107, the battery box body is fixed by the first pressing block 106 and the second pressing block 107, so that the battery box body can be conveniently welded by the laser welding device 101. The first sliding block 112 can move along the first driving rod 110, and the second sliding block 113 moves along the second driving rod 111, so that the clamping device 102 can drive the clamped battery box to move, and thus, the distance between the battery box and the laser welding device 101 can be adjusted, and accurate positioning is facilitated. In order to increase the safety in the welding process, the manual operation in the operation flow needs to be reduced, so the feeding device 103 is introduced in the scheme. The worker only needs to place the battery box on the conveyor belt 114, and the conveyor belt 114 can move the battery box between the first pressing block 106 and the second pressing block 107, so that the battery box is fixed.
In this embodiment, in order to facilitate the multi-angle welding of the laser welding device 101, the welding laser device 101 is composed of a mechanical arm 101a and a laser welding head 101b capable of rotating at multiple angles.
In the present embodiment, the driving device 115 has a plurality of setting modes, one of which is to directly drive the conveyor belt 114 to rotate through a motor; one is that the driving device 115 is placed at the side of the conveyor belt 114, and then a belt is arranged between the conveyor belt 114 and the driving device 115, and the conveyor belt 114 is driven to move by the belt; a plurality of gears may be disposed between the driving device 115 and the conveyor belt 114, and the driving device 115 drives the conveyor belt 114 to rotate through the cooperation of the gears.
In order to enable more precise positioning, preferably, the first support column 104 includes a first sliding groove 116, the first sliding groove 116 is formed by a surface of the first support column 104 facing the second support column 105 being recessed toward a surface of the first support column 104 away from the second support column 105, one end of the first sliding groove 116 faces the first sliding block 112, the other end of the first sliding groove 116 extends in a direction away from the first sliding block 112, and the first cylinder 108 is slidably connected with the first sliding groove 116; the second support column 105 includes a second sliding groove 117, the second sliding groove 117 is formed by the second support column 105 facing the first support column 104 and recessing the surface of the second support column 105 away from the first support column 104, one end of the second sliding groove 117 faces the second sliding block 113, the other end of the second sliding groove 117 extends in the direction away from the second sliding block 113, and the second cylinder 109 is connected with the second sliding groove 117 in a sliding manner. The first sliding groove 116 and the second sliding groove 117 are provided, so that the clamping device 102 can adjust the distance between the battery box and the conveyor belt 114, that is, the height of the battery box can be adjusted, thereby realizing accurate positioning of the battery box. If the height of the battery box body is adjusted manually, the working efficiency is reduced, and potential safety hazards are caused, therefore, the battery box body further comprises a first power module 118, a first screw rod 119 and a first limiting block 120, the first power module 118 is located at one end, away from the first sliding block 112, of the first support column 104, external threads are arranged on the outer wall of the first screw rod 119, the first limiting block 120 comprises a first limiting hole 120a with internal threads, the first screw rod 119 is in threaded connection with the first limiting hole 120a, one end of the first screw rod 119 is rotatably connected with the first power module 118, the other end of the first screw rod 119 is rotatably connected with the first sliding block 112, the first limiting block 120 is slidably arranged in the first sliding groove 116, and the first air cylinder 108 is connected with one surface, facing the second support column 105, of the first limiting block 120. Because the first screw 119 is in threaded connection with the first limiting block 120, when the first power module 118 drives the first screw 119 to rotate, the first limiting block 112 will also rotate along with the first screw 119. However, the first cylinder 108 is connected to the first stopper 120, which causes the first stopper 120 to be locked and unable to rotate, so that the first stopper 120 moves along the first lead screw 119 along with the rotation of the first lead screw 119, which realizes the function of automatically adjusting the height of the first extruding block 106. Similarly, still include second power module 121, second lead screw 122 and second stopper 123, second power module 121 is located the one end that second support column 105 kept away from second sliding block 113, the outer wall of second lead screw 122 is provided with the external screw thread, second stopper 123 is including having the spacing hole 123a of internal screw thread second, second lead screw 122 and the spacing hole 123a threaded connection of second, the one end and the second power module 121 of second lead screw 122 rotate to be connected, and the other end and the second sliding block 113 of second lead screw 122 rotate to be connected, second cylinder 109 is connected towards the one side of first support column 104 with second stopper 109. The second power module 121, the second lead screw 122 and the second limiting block 123 enable the second extrusion block 107 to freely adjust the height of the second extrusion block, and when the first extrusion block 106 and the second extrusion block 107 move synchronously, the height of the battery box fixed by the clamping device 102 can be uniformly adjusted on the whole.
Although the clamping device 102 can drive the battery box body to move transversely and longitudinally, the laser welding device 101 can still only perform welding operation on one surface of the battery box body, and for this purpose, the laser welding device further comprises a first motor 124 and a second motor 125, wherein the first motor 124 is located between the first air cylinder 108 and the first pressing block 106, the first pressing block 106 is rotationally connected with the first motor 124, the second motor 125 is located between the second air cylinder 109 and the second pressing block 107, and the second pressing block 107 is rotationally connected with the second motor 125. First motor 124 can drive first extrusion piece 106 and rotate, and second motor 125 can drive second extrusion piece 107 and rotate, and when the battery box was raised to a take the altitude by clamping device 102, first motor 124 and second motor 125 synchronous start, at this moment the battery box can take place to rotate to made things convenient for laser welding device 101 to carry out welding operation to a plurality of faces of battery box.
In order to reduce errors caused by manual operation and achieve positioning with higher accuracy, the laser welding device preferably further includes a first power device 126 and a second power device 127, one end of the first transmission rod 110 close to the laser welding device 101 is rotatably connected to the first power device 126, the other end of the first transmission rod 110 is connected to a first fixing block 128, one end of the second transmission rod 111 close to the laser welding device 101 is rotatably connected to the second power device 127, the other end of the second transmission rod 111 is connected to a second fixing block 129, the first transmission rod 110 and the second transmission rod 111 are both provided with external threads, the first sliding block 112 includes a first positioning hole 130 with internal threads, the second sliding block 113 includes a second positioning hole 131 with internal threads, the first transmission rod 110 is in threaded connection with the first positioning hole 130, and the second transmission rod 111 is in threaded connection with the second positioning hole 131. In order to avoid using manpower to move the first sliding block 112 and the second sliding block 113, the present embodiment introduces a first power device 126 and a second power device 127. The first power device 126 drives the first transmission rod 110 to rotate, and the second power device 127 drives the second transmission rod 111 to rotate. Since the first driving rod 110 is threadedly coupled to the first sliding block 112, the first driving rod 110 drives the first sliding block 112 to move along the first driving rod 110 when rotating. Similarly, the second sliding block 113 will also move along the second transmission rod 111. To ensure stability, the end of the first transmission rod 110 away from the first power device 126 is rotatably connected with a first fixing block 128; one end of the second transmission rod 111 far away from the second power device 127 is rotatably connected with a second fixed block 129.
In the present embodiment, the first power device 126 and the second power device 129 can be easily obtained devices such as motors, and the like.
In order to conveniently convey the battery box body, the feeding device 103 is introduced in the scheme. However, when the battery box is placed on the conveyor belt 114, there is a problem of the battery box being placed obliquely, which makes the holding device 102 unable to hold the battery box effectively. For this purpose, a limiting rod 132 is further included, the limiting rod 132 is located on a side of the conveyor belt 114 facing the first sliding block 112, one end of the limiting rod 132 is connected to one end of the first transmission rod 110 facing the laser welding device 101, and the other end of the limiting rod 132 extends toward the second transmission rod 111. When the battery box body reaches the limiting rod 132 along with the rotation of the conveyor belt 114, the battery box body can be blocked by the limiting rod 132, and the battery box body can be slowly changed from being inclined to being placed in the forward direction under the action of friction force, so that the battery box body can be conveniently fixed by the clamping device 102.
In order to prevent the battery case from slipping off the clamping device 102, it is preferable that the first pressing block 106 is provided with an elastic anti-slip pad 106a on the surface facing the second pressing block 107, and similarly, the second pressing block 107 is provided with an elastic anti-slip pad 107a on the surface facing the first pressing block 106.
In order to avoid potential safety hazards caused by high-temperature sputtering particles and sparks generated during welding, the device further comprises a supporting cabinet 133, a transparent explosion-proof cover 134 is arranged at one end, facing the laser welding device 101, of the supporting cabinet 133, and the laser welding device 101, the clamping device 102 and the feeding device 103 are located in the explosion-proof cover 134. Choose for use supporting cabinet 133 to support each device in this scheme to make things convenient for the workman to overhaul the operation. The transparent explosion-proof cover 134 is preferably made of explosion-proof glass, which not only facilitates real-time observation of workers, but also avoids high-temperature particles sputtering around during welding.
In conclusion, the clamping device 102 is introduced to avoid the problem that the welding seam of the battery box body expands during welding due to fixing errors. The clamping device 102 can displace and lift the battery box to achieve accurate positioning of the battery box, so that the laser welding device 101 can accurately position the battery box.
The present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes without creative labor from the above conception, and all the changes fall within the protection scope of the present invention.
Claims (8)
1. The utility model provides a whole case laser welding frock of lithium ion power battery system which characterized in that: the clamping device comprises a first supporting column and a second supporting column which are oppositely arranged, a first extrusion block is arranged on one surface, facing the second supporting column, of the first supporting column, a second extrusion block is arranged on one surface, facing the first supporting column, of the second supporting column, a first air cylinder is arranged between the first extrusion block and the first supporting column, and a second air cylinder is arranged between the second extrusion block and the second supporting column; the clamping device further comprises a first transmission rod and a second transmission rod, one end of the first transmission rod is close to the laser welding device, the other end of the first transmission rod extends in the direction far away from the laser welding device, and the second transmission rod is parallel to the first transmission rod; one end, facing the first transmission rod, of the first support column is connected with a first sliding block, the first transmission rod penetrates through the first sliding block, and the first sliding block moves along the first transmission rod; one end of the second support column, which faces the second transmission rod, is connected with a second sliding block, the second transmission rod penetrates through the second sliding block, and the second sliding block moves along the second transmission rod; the feeding device comprises a conveyor belt and a driving device for driving the conveyor belt to rotate, the conveyor belt is located between the first transmission rod and the second transmission rod, and the extension direction of the conveyor belt is the same as that of the first transmission rod.
2. The whole box laser welding tool for the lithium ion power battery system according to claim 1, characterized in that: the first support column comprises a first sliding groove, the first sliding groove is formed by sinking one surface, facing the second support column, of the first support column towards one surface, facing the first support column, of the second support column away from the second support column, one end of the first sliding groove faces the first sliding block, the other end of the first sliding groove extends in the direction away from the first sliding block, and the first cylinder is connected with the first sliding groove in a sliding mode; the second support column includes the second spout, the second spout is kept away from the sunken formation of one side of first support column by the second support column towards the second support column by the one side of first support column, the one end of second spout is towards the second sliding block, and the other end of second spout extends to the direction of keeping away from the second sliding block, second cylinder and second spout sliding connection.
3. The whole box laser welding tool for the lithium ion power battery system as claimed in claim 2, wherein: still include first power module, first lead screw and first stopper, first power module is located the one end that first sliding block was kept away from to first support column, the outer wall of first lead screw is provided with the external screw thread, first stopper is including having the first spacing hole of internal screw thread, first lead screw and first spacing hole threaded connection, the one end and the first power module of first lead screw rotate to be connected, and the other end and the first sliding block of first lead screw rotate to be connected, first stopper slides and sets up in first spout, first cylinder is connected with the one side of first stopper towards the second support column.
4. The whole box laser welding tool for the lithium ion power battery system as claimed in claim 2, wherein: still include second power module, second lead screw and second stopper, second power module is located the one end that the second sliding block was kept away from to the second support column, the outer wall of second lead screw is provided with the external screw thread, the second stopper is including having the spacing hole of internal screw thread second, the spacing hole threaded connection of second lead screw and second, the one end and the second power module of second lead screw rotate to be connected, and the other end and the second sliding block of second lead screw rotate to be connected, the second cylinder is connected towards the one side of first support column with the second stopper.
5. The whole box laser welding tool for the lithium ion power battery system according to claim 1, characterized in that: the extrusion device is characterized by further comprising a first motor and a second motor, wherein the first motor is positioned between the first air cylinder and the first extrusion block, the first extrusion block is rotatably connected with the first motor, the second motor is positioned between the second air cylinder and the second extrusion block, and the second extrusion block is rotatably connected with the second motor.
6. The whole box laser welding tool for the lithium ion power battery system according to claim 1, characterized in that: still include first power device and second power device, the one end that first transfer line is close to laser welding device rotates with first power device to be connected, and the other end of first transfer line is connected with first fixed block, the one end that the second transfer line is close to laser welding device rotates with second power device to be connected, the other end of second transfer line is connected with the second fixed block, first transfer line all is provided with the external screw thread with the second transfer line, first sliding block is including having the first locating hole of internal screw thread, the second sliding block is including having the internal screw thread second locating hole, first transfer line and first locating hole threaded connection, second transfer line and second locating hole threaded connection.
7. The whole box laser welding tool for the lithium ion power battery system according to claim 1, characterized in that: still include the gag lever post, the gag lever post is located the conveyer belt and is connected towards one side of first sliding block, the one end and the first transfer line of gag lever post are connected towards laser welding device's one end, and the other end of gag lever post extends to the second transfer line.
8. The whole box laser welding tool for the lithium ion power battery system according to claim 1, characterized in that: the laser welding device is characterized by further comprising a supporting cabinet, wherein a transparent explosion-proof cover is arranged at one end, facing the laser welding device, of the supporting cabinet, and the laser welding device, the clamping device and the feeding device are all located in the explosion-proof cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221092499.XU CN217832263U (en) | 2022-05-09 | 2022-05-09 | Whole case laser welding frock of lithium ion power battery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221092499.XU CN217832263U (en) | 2022-05-09 | 2022-05-09 | Whole case laser welding frock of lithium ion power battery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217832263U true CN217832263U (en) | 2022-11-18 |
Family
ID=84019734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221092499.XU Active CN217832263U (en) | 2022-05-09 | 2022-05-09 | Whole case laser welding frock of lithium ion power battery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217832263U (en) |
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2022
- 2022-05-09 CN CN202221092499.XU patent/CN217832263U/en active Active
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