CN219391903U - Gear tooth surface vortex detection device - Google Patents
Gear tooth surface vortex detection device Download PDFInfo
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- CN219391903U CN219391903U CN202320248508.8U CN202320248508U CN219391903U CN 219391903 U CN219391903 U CN 219391903U CN 202320248508 U CN202320248508 U CN 202320248508U CN 219391903 U CN219391903 U CN 219391903U
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- eddy current
- gear
- current probe
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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
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The application provides a gear tooth face vortex detection device relates to gear detection technical field, and gear tooth face vortex detection device includes fixture, detection mechanism and actuating mechanism. The clamping mechanism is used for positioning and driving the gear to be detected to rotate. The detection mechanism comprises an eddy current flaw detector and an eddy current probe, and the eddy current flaw detector is electrically connected with the eddy current probe. The eddy current probe is connected with a driving mechanism, and the driving mechanism is used for adjusting the position between the eddy current probe and the tooth surface of the gear to be detected. Through the cooperation of fixture and actuating mechanism, can make the eddy current probe with involute mode for the flank of tooth motion of waiting to detect the gear to carry out the scanning of detecting a flaw to the flank of tooth of gear, degree of automation is high, efficient, with low costs.
Description
Technical Field
The utility model relates to the technical field of gear detection, in particular to a gear tooth surface vortex detection device.
Background
The wind power gear box needs more planetary parts, a large number of planetary wheels and central wheel parts are used, and the gear box has very strict quality requirements on part materials due to very high reliability requirements in the service process, so that in the actual production and manufacturing process, various factories can plan more material detection means including ultrasonic, magnetic powder, acid washing and other means, and quality detection on the surfaces of the parts is particularly important. However, the development of the existing nondestructive testing method also causes limitations in the testing process, such as incapability of realizing automatic nondestructive searching of complex involute tooth surfaces, and difficulty in being fully popularized even though the magnetic powder and acid washing testing means are widely used in industry due to low testing efficiency, high personnel load and the like.
The inventors found in the study that the existing gear tooth surface detection device has the following disadvantages:
the detection efficiency is low and the cost is high.
Disclosure of Invention
The utility model aims to provide a gear tooth surface vortex detection device which can improve the automation degree, thereby improving the detection efficiency and reducing the detection cost.
Embodiments of the present utility model are implemented as follows:
the utility model provides a gear tooth surface vortex detection device, which comprises:
the clamping mechanism is used for positioning and driving the gear to be detected to rotate;
the detection mechanism comprises an eddy current flaw detector and an eddy current probe, and the eddy current flaw detector is electrically connected with the eddy current probe;
and the driving mechanism is connected with the eddy current probe and used for adjusting the position between the eddy current probe and the tooth surface of the gear to be detected.
In an alternative embodiment, the clamping mechanism comprises a base body, a rotary table and a thimble, wherein the rotary table and the thimble are both connected with the base body, the rotary table is matched with the thimble to clamp the gear to be detected, and the rotary table is used for driving the gear to be detected to rotate.
In an alternative embodiment, the turntable comprises a motor and a claw type bearing table, the motor is mounted on the base body, the claw type bearing table is mounted on an output shaft of the motor, and the claw type bearing table is used for extending into a central hole of a gear to be detected and abutting against a hole wall of the central hole.
In an alternative embodiment, the ejector pin has a tip for abutment with the gear to be inspected.
In an alternative embodiment, the drive mechanism includes a base, a first mobile platform slidably engaged with the base in a first direction, a second mobile platform slidably engaged with the first mobile platform in a second direction, and a third mobile platform slidably engaged with the second mobile platform in a third direction; the first direction, the second direction and the third direction are perpendicular to each other; the eddy current probe is connected with the third movable platform.
In an alternative embodiment, the driving mechanism further comprises an anti-collision unit, the anti-collision unit is mounted on the third moving platform, the eddy current probe is mounted on the anti-collision unit, and the anti-collision unit is used for allowing the eddy current probe to be far away from the gear to be detected.
In an alternative embodiment, the anti-collision unit comprises a mounting plate, a mounting rod, an elastic piece, a first limiting piece and a second limiting piece, wherein the mounting plate is mounted on the third moving platform, the mounting rod is slidably mounted on the mounting plate, the first limiting piece and the second limiting piece are both connected with the mounting rod, the mounting plate is positioned between the first limiting piece and the second limiting piece, the elastic piece is connected with the first limiting piece and the mounting plate at the same time, and the elastic piece is used for enabling the first limiting piece to have a movement trend away from the mounting plate and enabling the second limiting piece to be close to the mounting plate and to be abutted against the mounting plate; the eddy current probe is connected with the mounting rod.
In an alternative embodiment, the elastic element is provided as a spring, a leaf spring or a rubber element.
In an alternative embodiment, the first limiting member and the second limiting member are both screwed and fixed with the mounting rod.
In an alternative embodiment, the gear tooth surface eddy current testing device further comprises a cabinet, and the clamping mechanism, the testing mechanism and the driving mechanism are all arranged in the cabinet.
The embodiment of the utility model has the beneficial effects that:
in summary, in the gear tooth surface eddy current testing device provided in this embodiment, the gear to be tested is positioned by the clamping mechanism, and then the position of the eddy current probe is adjusted by the driving mechanism, so that the eddy current probe is tangential to the tooth surface of the gear to be tested, and the eddy current probe has a distance from the tooth surface, that is, the eddy current probe is not directly contacted with the tooth surface. During detection, the tooth is scanned from the tooth root to the tooth tip. That is, before alignment, the eddy current probe is aligned with the tooth root position of the tooth, and then the driving mechanism drives the eddy current probe to move along the axial direction of the gear to be detected. After the eddy current probe scans the corresponding position of the tooth root of the whole tooth in the axial direction, the clamping mechanism is utilized to drive the gear to be detected to rotate for a certain angle according to the set direction, and the driving mechanism drives the eddy current probe to move, so that the eddy current probe is continuously positioned at a position tangential to the tooth surface and with a distance, and then the eddy current probe scans the tooth along the axial direction of the gear again, and the operation is repeated until all the teeth of the gear are scanned. The whole process realizes automatic operation, and has high efficiency and low cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a gear tooth surface eddy current testing device according to an embodiment of the utility model;
FIG. 2 is a schematic view of a structure of a clamping mechanism, a detecting mechanism and a driving mechanism according to an embodiment of the present utility model;
FIG. 3 is a schematic view of a clamping mechanism, a detection mechanism and a driving mechanism according to another embodiment of the present utility model;
fig. 4 is a partially enlarged schematic view of the structure of fig. 3.
Icon:
001-a gear to be detected; 011—a first tooth surface; 012-second tooth flank; 100-clamping mechanism; 110-matrix; 120-rotating a table; 130-thimble; 200-detecting mechanism; 210-an eddy current flaw detector; 220-eddy current probe; 300-a driving mechanism; 310-base; 320-a first mobile platform; 330-a second mobile platform; 340-a third mobile platform; 400-anti-collision units; 410-mounting plates; 420-mounting a rod; 430-an elastic member; 440-first limiting piece; 450-a second limiting piece; 500-cabinet.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Examples
Referring to fig. 1-4, in the present embodiment, the gear tooth surface eddy current testing apparatus includes a clamping mechanism 100, a testing mechanism 200 and a driving mechanism 300. The clamping mechanism 100 is used for positioning and driving the gear 001 to be detected to rotate. The inspection mechanism 200 includes an eddy current flaw detector 210 and an eddy current probe 220, and the eddy current flaw detector 210 is electrically connected to the eddy current probe 220. The eddy current probe 220 is connected to a driving mechanism 300, and the driving mechanism 300 is used for adjusting the position between the eddy current probe 220 and the tooth surface of the gear 001 to be detected.
The working principle of the gear tooth surface vortex detection device provided by the embodiment is as follows:
the gear 001 to be detected is positioned by the clamping mechanism 100, and then the position of the eddy current probe 220 is adjusted by the driving mechanism 300, so that the eddy current probe 220 is tangential to the tooth surface of the gear 001 to be detected and the eddy current probe 220 has a distance from the tooth surface, that is, the eddy current probe 220 is not directly contacted with the tooth surface. During detection, the tooth is scanned from the tooth root to the tooth tip. That is, before alignment, the eddy current probe 220 is aligned with the tooth root position of the tooth, and then the driving mechanism 300 drives the eddy current probe 220 to move along the axial direction of the gear 001 to be detected. After the eddy current probe 220 scans the corresponding position of the tooth root of the whole tooth in the axial direction, the clamping mechanism 100 is utilized to drive the gear 001 to be detected to rotate for a certain angle according to the set direction, and the driving mechanism 300 drives the eddy current probe 220 to move, so that the eddy current probe 220 is continuously positioned at a position which is tangential to the tooth surface and has a distance, and then the eddy current probe 220 scans the tooth along the axial direction of the gear again, and the operation is repeated until all the teeth of the gear are scanned. The whole process realizes automatic operation, and has high efficiency and low cost.
It should be noted that, referring to fig. 4, each tooth has a first tooth face 011 and a second tooth face 012 opposite to each other in the circumferential direction of the gear, and the first tooth face 011 and the second tooth face 012 of adjacent teeth are adjacent to each other, so that, in the circumferential direction of the gear, the first tooth face 011 and the second tooth face 012 are alternately arranged, and during scanning detection, for example, the gear 001 to be detected is driven by the clamping mechanism 100 to rotate clockwise first, after scanning detection is completed for all the first tooth faces 011, and after scanning detection is completed for all the second tooth faces 012, scanning detection is completed for all the second tooth faces 012 in anticlockwise rotation, and finally, tooth face detection of the whole gear is completed.
Referring to fig. 2, in this embodiment, optionally, the clamping mechanism 100 includes a base 110, a turntable 120, and a thimble 130. The turntable 120 includes a motor and a jaw-type bearing table, and the motor and the thimble 130 are fixed on the base 110. The jaw type carrying table is provided with three jaw main bodies which can be close to the center or spread from the center to the periphery. When in use, before the gear 001 to be detected is placed on the claw type bearing table, the three claw main bodies are mutually closed, then the gear 001 to be detected is assembled on the claw type bearing table, the three claw main bodies extend into the central hole of the gear 001 to be detected, then, the positions of the three claw main bodies are adjusted, so that the three claw main bodies are opened and are abutted with the hole wall of the central hole, and the clamping and positioning of the gear 001 to be detected are completed. The three jaw bodies may be controlled by three cylinders or hydraulic cylinders, respectively. The thimble 130 is located above the turntable 120, one end of the thimble 130 close to the turntable 120 is provided as a tip, and the thimble 130 can be abutted with the top surface of the gear 001 to be detected (i.e. the end surface far away from the turntable 120). It should be understood that when the center hole of the gear 001 to be detected is a through hole, the thimble 130 may be suspended and not act, and the clamping and positioning of the gear can be realized by means of the turntable 120.
In this embodiment, alternatively, the eddy current flaw detector 210 and the eddy current probe 220 are both of existing structures, and can be obtained by directly purchasing in the market, and after the tooth surface of the gear is scanned by the eddy current probe 220, the material and the machining defect of the tooth surface after finish machining can be effectively identified.
Referring to fig. 2 and 3, in the present embodiment, optionally, the driving mechanism 300 includes a base 310, a first moving platform 320, a second moving platform 330 and a third moving platform 340, where the first moving platform 320 is slidably engaged with the base 310 in a first direction, the second moving platform 330 is slidably engaged with the first moving platform 320 in a second direction, and the third moving platform 340 is slidably engaged with the second moving platform 330 in a third direction; the first direction, the second direction and the third direction are perpendicular to each other; the eddy current probe 220 is connected to a third moving platform 340. It should be noted that, the first moving platform 320 may be driven by a stepper motor or a motor screw structure to make it slide reciprocally with respect to the base 310; the second moving platform 330 can be driven by a stepping motor or a motor screw rod structure to make the second moving platform slide back and forth relative to the first moving platform 320; the third moving platform 340 may be driven by a stepping motor or a motor screw structure to make it slide reciprocally with respect to the second moving platform 330. In this way, the eddy current probe 220 can move in a three-dimensional space, thereby adjusting the position to be engaged with the tooth surface of the gear 001 to be detected.
The control is performed through the stepping motor, the control automation degree is high, the control precision is high, and the position of the eddy current probe 220 is convenient to adjust.
Referring to fig. 3-4, in this embodiment, optionally, the driving mechanism 300 further includes an anti-collision unit 400, the anti-collision unit 400 is mounted on the third moving platform 340, the eddy current probe 220 is mounted on the anti-collision unit 400, and the anti-collision unit 400 is used to allow the eddy current probe 220 to be far away from the gear 001 to be detected. That is, in the operation process of the detection device, if misoperation or other conditions occur, when the eddy current probe 220 collides with the gear 001 to be detected, at this time, due to the design of the anti-collision unit 400, the eddy current probe 220 can be far away from the gear 001 to be detected, so as to play a role in force unloading and buffering, avoid rigid collision between the eddy current probe 220 and the gear 001 to be detected, and reduce the damage probability of the eddy current probe 220 and the gear 001 to be detected.
Referring to fig. 4, the anti-collision unit 400 may alternatively include a mounting plate 410, a mounting bar 420, an elastic member 430, a first stopper 440, and a second stopper 450. The mounting plate 410 is mounted on the third moving platform 340, a mounting through hole is formed in the mounting plate 410, the mounting rod 420 is slidably disposed in the mounting through hole, and the sliding direction of the mounting rod 420 and the mounting through hole is the second direction, that is, the mounting rod 420 can be close to or far away from the clamping mechanism 100 in the second direction, so as to be close to or far away from the gear 001 to be detected located on the clamping mechanism 100. The first limiting piece 440 and the second limiting piece 450 are both in threaded connection outside the mounting rod 420, and the distance between the first limiting piece 440 and the second limiting piece 450 is adjustable. The mounting plate 410 is located between the first limiting member 440 and the second limiting member 450, and the first limiting member 440 is located on a side of the mounting plate 410 close to the clamping mechanism 100, and correspondingly, the second limiting member 450 is located on a side of the mounting plate 410 away from the clamping mechanism 100. The elastic member 430 may be a spring, where the elastic member 430 is sleeved outside the mounting rod 420 and located between the mounting plate 410 and the first limiting member 440, and two ends of the elastic member 430 are respectively abutted against the first limiting member 440 and the mounting plate 410, so that the first limiting member 440 has a movement trend away from the mounting plate 410, and the second limiting member 450 is close to the mounting plate 410 and abuts against the mounting plate 410. That is, in the normal state, the elastic member 430 is in a compressed state, and the first stopper 440 has a tendency to approach the clamping mechanism 100 under the elastic force, and the positions of the first stopper 440, the mounting bar 420, and the second stopper 450 with respect to the mounting plate 410 remain unchanged due to the abutment of the second stopper 450 with the mounting plate 410. The eddy current probe 220 is connected to the mounting bar 420, and the position of the eddy current probe 220 with respect to the mounting plate 410 is maintained in a normal state. When there is a misoperation, the eddy current probe 220 collides with the gear 001 to be detected, and the collision force is transmitted to the mounting rod 420 and the first limiting member 440, so that the elastic member 430 is compressed, the second limiting member 450 can be away from the mounting plate 410, and finally the eddy current probe 220 is retracted to be away from the gear 001 to be detected, so that damage caused by collision is reduced. After the readjustment of the positions of the gear 001 to be detected and the eddy current probe 220 is completed, the eddy current probe 220 is reset under the action of the elastic member 430, and can be used normally.
By adjusting the positions of the first stopper 440 and the second stopper 450, the amount by which the elastic member 430 is compressed can be adjusted, thereby adjusting the elastic force. In addition, the installation rod 420 can be a hollow rod, and a data line connected with the eddy current probe 220 and the eddy current flaw detector 210 can be arranged inside the installation rod 420 in a penetrating way, so that wiring of the wire harness is facilitated. In addition, the elastic member 430 may be provided as a spring sheet, a rubber member, or the like.
In other embodiments, the anti-collision unit 400 may further prevent the eddy current probe 220 from colliding with the gear 001 to be detected by providing a distance sensor, that is, when the distance sensor obtains that the distance between the eddy current probe 220 and the gear 001 to be detected is within a threshold range, the distance sensor transmits the information to the controller, and the controller can control the driving mechanism 300 to drive the eddy current probe 220 to be away from the gear 001 to be detected, so as to avoid collision between the eddy current probe 220 and the gear 001 to be detected, and also play a role in protecting the eddy current probe 220 and the gear 001 to be detected.
In this embodiment, optionally, the gear tooth surface eddy current testing device further includes a cabinet 500, and the clamping mechanism 100, the testing mechanism 200 and the driving mechanism 300 are all disposed in the cabinet 500, so that the whole device has high integration level, compact structure, small volume and convenient movement. In addition, a braking traveling wheel set can be arranged at the bottom of the cabinet 500, so that the moving capability is further improved.
The gear tooth surface eddy current testing device provided by the embodiment can enable the eddy current probe 220 to move relative to the tooth surface of the gear 001 to be tested in an involute mode through the cooperation of the clamping mechanism 100 and the driving mechanism 300, so that flaw detection and scanning are performed on the tooth surface of the gear, the automation degree is high, the efficiency is high, and the cost is low.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A gear tooth surface eddy current testing device, comprising:
the clamping mechanism is used for positioning and driving the gear to be detected to rotate;
the detection mechanism comprises an eddy current flaw detector and an eddy current probe, and the eddy current flaw detector is electrically connected with the eddy current probe;
and the driving mechanism is connected with the eddy current probe and used for adjusting the position between the eddy current probe and the tooth surface of the gear to be detected.
2. The gear tooth-surface vortex detecting device according to claim 1, wherein:
the clamping mechanism comprises a base body, a rotary table and a thimble, wherein the rotary table and the thimble are connected with the base body, the rotary table is matched with the thimble to clamp a gear to be detected, and the rotary table is used for driving the gear to be detected to rotate.
3. The gear tooth-surface vortex detecting device according to claim 2, wherein:
the rotary table comprises a motor and a claw type bearing table, the motor is mounted on the base body, the claw type bearing table is mounted on an output shaft of the motor, and the claw type bearing table is used for extending into a central hole of a gear to be detected and is abutted to the hole wall of the central hole.
4. The gear tooth-surface vortex detecting device according to claim 2, wherein:
the thimble is provided with a tip used for abutting against the gear to be detected.
5. The gear tooth-surface vortex detecting device according to claim 1, wherein:
the driving mechanism comprises a base, a first moving platform, a second moving platform and a third moving platform, wherein the first moving platform is slidably matched with the base in a first direction, the second moving platform is slidably matched with the first moving platform in a second direction, and the third moving platform is slidably matched with the second moving platform in a third direction; the first direction, the second direction and the third direction are perpendicular to each other; the eddy current probe is connected with the third movable platform.
6. The gear tooth-surface eddy current testing device according to claim 5, wherein:
the driving mechanism further comprises an anti-collision unit, the anti-collision unit is mounted on the third moving platform, the eddy current probe is mounted on the anti-collision unit, and the anti-collision unit is used for allowing the eddy current probe to be far away from the gear to be detected.
7. The gear tooth-surface eddy current testing device according to claim 6, wherein:
the anti-collision unit comprises a mounting plate, a mounting rod, an elastic piece, a first limiting piece and a second limiting piece, wherein the mounting plate is mounted on the third moving platform, the mounting rod is slidably mounted on the mounting plate, the first limiting piece and the second limiting piece are both connected with the mounting rod, the mounting plate is positioned between the first limiting piece and the second limiting piece, and the elastic piece is simultaneously connected with the first limiting piece and the mounting plate and is used for enabling the first limiting piece to have a movement trend far away from the mounting plate and enabling the second limiting piece to be close to the mounting plate and to be in butt joint with the mounting plate; the eddy current probe is connected with the mounting rod.
8. The gear tooth-surface vortex detection apparatus according to claim 7, wherein:
the elastic piece is arranged as a spring, a shrapnel or a rubber piece.
9. The gear tooth-surface vortex detection apparatus according to claim 7, wherein:
the first limiting piece and the second limiting piece are both fixedly connected with the mounting rod in a threaded mode.
10. The gear tooth-surface vortex detecting device according to claim 1, wherein:
the gear tooth surface vortex detection device further comprises a cabinet, and the clamping mechanism, the detection mechanism and the driving mechanism are all arranged in the cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320248508.8U CN219391903U (en) | 2023-02-17 | 2023-02-17 | Gear tooth surface vortex detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320248508.8U CN219391903U (en) | 2023-02-17 | 2023-02-17 | Gear tooth surface vortex detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219391903U true CN219391903U (en) | 2023-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320248508.8U Active CN219391903U (en) | 2023-02-17 | 2023-02-17 | Gear tooth surface vortex detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219391903U (en) |
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2023
- 2023-02-17 CN CN202320248508.8U patent/CN219391903U/en active Active
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