CN219711718U - Variable wind power generation fan blade - Google Patents
Variable wind power generation fan blade Download PDFInfo
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- CN219711718U CN219711718U CN202122672234.9U CN202122672234U CN219711718U CN 219711718 U CN219711718 U CN 219711718U CN 202122672234 U CN202122672234 U CN 202122672234U CN 219711718 U CN219711718 U CN 219711718U
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- 238000010248 power generation Methods 0.000 title claims abstract description 30
- 230000007246 mechanism Effects 0.000 claims abstract description 131
- 230000005540 biological transmission Effects 0.000 claims abstract description 58
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 12
- 230000005611 electricity Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 6
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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Abstract
The utility model provides a variable wind power generation fan blade, which belongs to the technical field of power generator fan blades, and comprises a main body fan blade, wherein the main body fan blade is arranged on a vertical shaft, the vertical shaft is connected with a power generator main body, an adjusting mechanism is arranged on the main body fan blade, the adjusting mechanism comprises a driving device, a transmission mechanism, a telescopic mechanism and a secondary fan blade mechanism, the driving device is arranged on the main body fan blade, the secondary fan blade mechanism is in rotary connection with the telescopic mechanism, and the driving device is connected with the secondary fan blade mechanism through the transmission mechanism. The auxiliary fan blade mechanism is additionally arranged on the main fan blade, and then the driving device and the transmission device are utilized to conduct angle adjustment on the auxiliary fan blade mechanism, so that the stress of the main fan blade can be changed, the effect of effectively generating electricity under normal running of various wind speeds and wind power can be achieved, and the problem that in the prior art, the wind driven generator can effectively generate electricity only under the condition of specific wind speeds is solved.
Description
Technical Field
The utility model belongs to the technical field of generator blades, and particularly relates to a variable wind power generation blade.
Background
Wind power generation refers to converting kinetic energy of wind into electrical energy. Wind is a pollution-free energy source, wind power generation is very environment-friendly, and electric energy which can be generated is very huge, and wind energy is used as a clean renewable energy source, so that more and more countries pay more attention to wind power generation.
In the prior art, the wind blades for wind power generation are generally not adjustable, so that the current wind power generation is very influenced by wind power, and the wind power generation can be effectively performed only under the specific wind speed condition, and therefore, improvement is needed.
Disclosure of Invention
The utility model aims to provide a variable wind power generation fan blade, and aims to solve the problem that a wind power generator can generate electricity effectively only under the condition of specific wind speed in the prior art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a variable wind power generation fan blade, includes the main part fan blade, the main part fan blade is installed on vertical axle, vertical axle and generator main part are connected, be provided with adjustment mechanism on the main part fan blade, adjustment mechanism includes drive arrangement, drive mechanism, telescopic machanism and vice fan blade mechanism, drive arrangement installs on the main part fan blade, be the rotation connection between vice fan blade mechanism and the telescopic machanism, be connected through drive mechanism between drive arrangement and the vice fan blade mechanism, telescopic machanism is connected with the main part fan blade.
In order to enable the variable wind power generation fan blade to achieve the effect of conveniently installing various auxiliary mechanisms, the main body fan blade is preferable to be provided with a first fan blade, the first fan blade is fixedly connected with a vertical shaft, a support is fixedly connected to the first fan blade, and the driving device, the transmission mechanism and the telescopic mechanism are all arranged on the support.
In order to enable the variable wind power generation fan blade to achieve the effect of adjusting the contact area of the whole fan blade and wind, the telescopic mechanism comprises a supporting plate and a first hydraulic device, wherein one end of the supporting plate is connected with a support in an inserting mode, one end of the first hydraulic device is fixedly connected with the supporting plate, the other end of the first hydraulic device is fixedly connected with the support, and the auxiliary fan blade mechanism is arranged on the supporting plate.
In order to enable the variable wind power generation fan blade to achieve the effect of changing the wind resistance of the main fan blade, as the preferable mode of the variable wind power generation fan blade, the auxiliary fan blade mechanism comprises a first auxiliary fan blade and a gear, the outer ends of the first auxiliary fan blade and the supporting plate are in rotary connection, and a rotating shaft of the first auxiliary fan blade penetrates through the top supporting plate and the gear to be fixedly connected.
In order to enable the variable wind power generation fan blade to achieve the transmission function, as the utility model, the transmission mechanism preferably comprises a worm, a first transmission shaft, a first support and a first driven bevel gear, wherein the worm and the first transmission shaft are respectively arranged on the support plate and the support through the first support, one end of the worm is in meshed connection with the gear, the other end of the worm is in plug-in connection with one end of the first transmission shaft, the other end of the first transmission shaft is fixedly connected with the first driven bevel gear, and the first driven bevel gear is connected with the driving device.
In order to enable the variable wind power generation fan blade to achieve the effect of driving the auxiliary fan blade mechanism, as a preferable mode of the variable wind power generation fan blade, the driving device comprises a first stepping motor, a first driving bevel gear and a fixing frame, wherein the fixing frame is fixedly connected to the upper surface of the support, the first stepping motor is fixedly connected to the fixing frame, the output end of the first stepping motor is fixedly connected with the first driving bevel gear, and the first driving bevel gear is in meshed connection with the first driven bevel gear.
In order to achieve the effect of stable adjustment of the variable wind power generation fan blade, the length of the insertion between the bracket and the supporting plate and the length of the insertion between the worm and the first transmission shaft are preferably larger than the maximum working stroke of the first hydraulic device.
In order to diversify the variable wind power generation fan blade so as to have stronger adaptability, as the preferred mode of the utility model, one first fan blade can be matched with one or more groups of transmission mechanisms, auxiliary fan blade mechanisms and telescopic mechanisms, and each group of transmission mechanisms can be integrally driven by one group of driving devices or independently driven by a plurality of groups of driving devices.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the variable wind power generation fan blade, the auxiliary fan blade mechanism is additionally arranged on the main body fan blade, and then the driving device and the transmission device are utilized to conduct angle adjustment on the auxiliary fan blade mechanism, so that the stress of the main body fan blade can be changed, the effect of effective power generation under normal running of various wind speeds and wind power can be achieved, the problem that the wind power generator does not operate due to insufficient wind speed or the load is overlarge due to overlarge wind speed and wind power interference is caused to the wind power generator is prevented, the wind power generator is stable and durable, and the problem that the wind power generator can generate power effectively only under the specific wind speed in the prior art is solved.
2. According to the variable wind power generation fan blade, the stress area of the whole fan blade can be changed by the aid of the telescopic mechanism, the stress area is reduced when the wind speed is too high, so that the generator can run safely and stably, when the wind speed is too low, the stress area is increased, normal running of the generator is guaranteed, different wind speeds can be better matched by means of mutual matching of the telescopic mechanism and the auxiliary fan blade mechanism, the power generation effect is improved, and the generator can be protected.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
FIG. 1 is a schematic overall structure of a first embodiment of the present utility model;
FIG. 2 is a schematic view of an adjusting mechanism according to a first embodiment of the present utility model;
FIG. 3 is an enlarged schematic view of the structure A in FIG. 2 according to an embodiment of the present utility model;
FIG. 4 is a schematic structural view of a first fan blade according to a first embodiment of the present utility model;
FIG. 5 is a schematic view of a worm and drive shaft in accordance with an embodiment of the utility model;
FIG. 6 is a schematic view showing a structure of a bracket according to a first embodiment of the present utility model;
FIG. 7 is a schematic view of the overall structure of a second embodiment of the present utility model;
FIG. 8 is an enlarged view of the structure of FIG. 7B according to the second embodiment of the present utility model;
FIG. 9 is a schematic view of the rear overall structure of a second embodiment of the present utility model;
in the figure: 1. a first fan blade; 2. a bracket; 3. a support plate; 4. a worm; 5. a first drive shaft; 6. a first stepping motor; 7. a first support; 8. a gear; 9. a fixing frame; 10. the first auxiliary fan blade; 11. a vertical shaft; 12. a first hydraulic machine; 13. a first drive bevel gear; 14. a first driven bevel gear; 15. a second fan blade; 16. a second drive shaft; 17. a universal shaft; 18. a second drive bevel gear; 19. a fixed plate; 20. a movable plate; 21. a horizontal axis; 22. a second hydraulic machine; 23. a second stepping motor; 24. a connecting rod; 25. a second auxiliary fan blade; 26. fixing the fan blade; 27. a second support; 28. a third support; 29. a connecting shaft; 30. a second driven bevel gear.
Detailed Description
Example 1
The technical solutions of the first embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the first embodiment of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. 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.
Referring to fig. 1-6, the present utility model provides the following technical solutions: the variable wind power generation fan blade comprises a main fan blade, wherein the main fan blade is arranged on a vertical shaft 11, the vertical shaft 11 is connected with a generator main body, an adjusting mechanism is arranged on the main fan blade and comprises a driving device, a transmission mechanism, a telescopic mechanism and an auxiliary fan blade mechanism, the driving device is arranged on the main fan blade, the auxiliary fan blade mechanism is connected with the telescopic mechanism in a rotating way, the driving device is connected with the auxiliary fan blade mechanism through the transmission mechanism, and the telescopic mechanism is connected with the main fan blade.
In the specific embodiment of the utility model, when in use, the driving device is used for driving the transmission mechanism to rotate the auxiliary fan blade mechanism, so that the effect of adjusting the angle of the auxiliary fan blade mechanism is achieved, the stress size of the main fan blade can be changed along with the change of the angle of the auxiliary fan blade mechanism, the fan blade can adapt to different wind speeds, and the auxiliary fan blade mechanism can be driven to change the stress area size of the whole fan blade through the arranged telescopic mechanism.
Specifically, the main part fan blade includes first fan blade 1, fixed connection between first fan blade 1 and the vertical axle 11, fixedly connected with support 2 on the first fan blade 1, drive arrangement, drive mechanism and telescopic machanism all set up on support 2, through the support 2 that sets up, can make various auxiliary mechanism install, in the practical application in-process, support 2 can exist alone, then carry out fixed connection to support 2 and main part fan blade, also can be that support 2 and main part fan blade are integrative, namely install the structure direct mount on specific main part fan blade on support 2.
Preferably, the telescopic machanism includes backup pad 3 and first hydraulic means 12, for pegging graft between the one end of backup pad 3 and the support 2, the one end and the backup pad 3 fixed connection of first hydraulic means 12, the other end and support 2 fixed connection, vice fan blade mechanism installs on backup pad 3, when using, under the effect through first hydraulic means 12, can make backup pad 3 take vice fan blade mechanism to keep away from or be close to the position of main part fan blade and remove, thereby the atress area of whole fan blade has been reached, in practical application, hydraulic drive can replace other devices or mechanisms that can realize this function, for example, motor driven rack and pinion or crank slider mechanism isotructure driven by the motor.
Preferably, the auxiliary fan blade mechanism comprises a first auxiliary fan blade 10 and a gear 8, the outer ends of the first auxiliary fan blade 10 and the supporting plate 3 are in rotary connection, and a rotating shaft of the first auxiliary fan blade 10 penetrates through the top supporting plate 3 and the gear 8 to be fixedly connected, and when the auxiliary fan blade mechanism is used, the driving device drives the transmission mechanism to enable the first auxiliary fan blade 10 to rotate along the rotating shaft, so that the stress condition of the whole fan blade can be changed.
Further, the drive mechanism includes worm 4, first transmission shaft 5, first support 7 and first driven bevel gear 14, worm 4 and first transmission shaft 5 are all installed respectively on backup pad 3 and support 2 through first support 7, the one end and the gear 8 meshing of worm 4 are connected, be pegging graft between the other end of worm 4 and the one end of first transmission shaft 5, the other end and the first driven bevel gear 14 fixed connection of first transmission shaft 5, first driven bevel gear 14 and drive arrangement are connected, when using, drive arrangement's drive makes first transmission shaft 5 rotate and drive worm 4 and rotate, then worm 4 drives gear 8 and makes first pair fan blade 10 rotate, thereby reach the angle modulation, through setting up to peg graft between worm 4 and the first transmission shaft 5, can reach the normal operating that does not influence telescopic machanism, in the practical application in-process, this kind of drive mechanism can be changed to other drive mechanisms that can realize this function.
Specifically, the driving device comprises a first stepping motor 6, a first drive bevel gear 13 and a fixing frame 9, wherein the fixing frame 9 is fixedly connected to the upper surface of the support 2, the first stepping motor 6 is fixedly connected to the fixing frame 9, the output end of the first stepping motor 6 is fixedly connected with the first drive bevel gear 13, the first drive bevel gear 13 is in meshed connection with the first driven bevel gear 14, and when the driving device is used, the first stepping motor 6 is started to enable the first drive bevel gear 13 to rotate so as to drive the first driven bevel gear 14, so that power output is provided for a transmission mechanism.
In particular, the length of the insertion between the support 2 and the support plate 3 and between the worm 4 and the first transmission shaft 5 is greater than the maximum working stroke of the first hydraulic means 12, by which arrangement the uncoupling between the support 2 and the support plate 3 and between the worm 4 and the first transmission shaft 5 can be prevented.
Specifically, one first fan blade 1 can be matched with one or more groups of transmission mechanisms, auxiliary fan blade mechanisms and telescopic mechanisms, in practical application, a plurality of groups of auxiliary fan blade mechanisms and telescopic mechanisms and transmission mechanisms matched with the auxiliary fan blade mechanisms can be installed according to requirements, the stress condition of the whole fan blade can be better changed by arranging a plurality of groups of auxiliary fan blade mechanisms, each group of transmission mechanisms can be integrally driven by a group of driving devices or independently driven by a plurality of groups of driving devices, in practical application, when one group of driving devices is utilized, the plurality of groups of auxiliary fan blade mechanisms can be synchronously controlled, and when the shape of the fan blade is better changed, a plurality of groups of driving devices can be adopted to independently control each group of auxiliary fan blade mechanisms, namely, the first driven bevel gears 14 on the transmission mechanisms matched with each group of auxiliary fan blade mechanisms are independently connected by one group of driving devices.
Example two
The technical solution of another embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the second embodiment of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. 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.
Referring to fig. 7-9, the second embodiment is different from the first embodiment in that: the variable wind power generation fan comprises a main fan body, the main fan body is arranged on a horizontal shaft 21, the horizontal shaft 21 is connected with a generator main body, an adjusting mechanism is arranged on the main fan body and comprises a driving device, a transmission mechanism, a telescopic mechanism and an auxiliary fan blade mechanism, the driving device is arranged on the main fan body, the auxiliary fan blade mechanism is arranged on the main fan body, the driving device is connected with the auxiliary fan blade mechanism through the transmission mechanism, and the telescopic mechanism is arranged between the main fan blade and the horizontal shaft 21.
In a second embodiment of the utility model, when in use, the driving device is used for driving the transmission mechanism to rotate the auxiliary fan blade mechanism, so as to achieve the effect of adjusting the angle of the auxiliary fan blade mechanism, thereby changing the stress size of the main fan blade along with the change of the angle of the auxiliary fan blade mechanism, adapting the fan blade to different wind speeds, and changing the stress area size of the whole fan blade through the telescopic mechanism.
Specifically, the main part fan blade includes fixed disk 19, fixed fan blade 26 and second fan blade 15, is fixed connection between fixed disk 19 and the horizontal axis 21, and fixed fan blade 26 fixed connection is on fixed disk 19, and second fan blade 15 cup joints on fixed fan blade 26, and telescopic machanism sets up between horizontal axis 21 and second fan blade 15, and when using, can utilize telescopic machanism to change the relative position between second fan blade 15 and the fixed fan blade 26 to can change the atress area of whole fan blade.
Further, the telescopic mechanism comprises a movable plate 20, a connecting rod 24 and a second hydraulic device 22, the movable plate 20 and the horizontal shaft 21 are in single-degree-of-freedom sliding connection, one end of the connecting rod 24 is hinged with the outer end of the movable plate 20, the other end of the connecting rod is hinged with the second fan blade 15, one end of the second hydraulic device 22 is fixedly connected with the surface of the movable plate 20, the other end of the second hydraulic device 22 is fixedly connected with the horizontal shaft 21, and when the telescopic mechanism is used, the second hydraulic device 22 can drive the movable plate 20 to move, so that the connecting rod 24 pushes or pulls the second fan blade 15, the stressed area of the whole fan blade is changed, the device can adapt to different wind speeds, the generator can run more stably, and in practical application, hydraulic driving can be replaced by other devices or mechanisms capable of achieving the function, such as a gear rack driven by a motor or a crank slider mechanism driven by the motor.
Specifically, the auxiliary fan blade mechanism comprises a second auxiliary fan blade 25, the second auxiliary fan blade 25 is in rotary connection with the second fan blade 15, one end, close to the fixed disc 19, of the rotary shaft of the second auxiliary fan blade 25 extends out to be connected with the transmission mechanism, and when the auxiliary fan blade mechanism is used, the driving device drives the transmission mechanism to enable the second auxiliary fan blade 25 to rotate along the rotary shaft, so that the stress condition of the whole fan blade can be changed.
Specifically, the transmission mechanism includes a second transmission shaft 16, a cardan shaft 17, a connecting shaft 29, a second driven bevel gear 30, a second support 27 and a third support 28, the rotation shafts of the second transmission shaft 16 and the second auxiliary fan blade 25 are in plug-in connection, the second transmission shaft 16 and the connecting shaft 29 are connected through the cardan shaft 17, one end of the connecting shaft 29 is fixedly connected with the second driven bevel gear 30, the second driven bevel gear 30 is connected with the driving device, the second transmission shaft 16 is mounted on the fixed fan blade 26 through the second support 27, the connecting shaft 29 is mounted on the fixed disc 19 through the third support 28, when in use, the connecting shaft 29 can be rotated through the driving of the driving device, then power is transmitted to the second transmission shaft 16 through the cardan shaft 17, so that the second auxiliary fan blade 25 can be subjected to angle adjustment, and the same effect as in the first embodiment can be achieved through changing the angle.
Specifically, the driving device includes a second step motor 23 and a second drive bevel gear 18, the second drive bevel gear 18 is fixedly connected with an output shaft of the second step motor 23, the second drive bevel gear 18 is in meshed connection with a second driven bevel gear 30, the second step motor 23 is fixedly connected with the back of the fixed disc 19, and when in use, the second step motor 23 is started to transmit power to the transmission mechanism through the second drive bevel gear 18.
Specifically, one second fan blade 15 may be matched with one or more groups of transmission mechanisms and auxiliary fan blade mechanisms, in practical application, multiple groups of auxiliary fan blade mechanisms and transmission mechanisms matched with the auxiliary fan blade mechanisms may be installed according to requirements, stress conditions of the whole fan blade may be better changed by setting multiple groups of auxiliary fan blade mechanisms, each group of transmission mechanisms may be integrally driven by one group of driving devices or independently driven by multiple groups of driving devices, in practical application, when one group of driving devices is utilized, referring to fig. 7-9, multiple groups of auxiliary fan blade mechanisms may be synchronously controlled, and in order to better change the forms of the fan blades, multiple groups of driving devices may be used to individually control each group of auxiliary fan blade mechanisms, i.e. the second driven bevel gear 30 on the transmission mechanism matched with each group of auxiliary fan blade mechanisms is individually connected by one group of driving devices.
The stepper motors presented herein are all powered using a wireless charging structure.
The electrical components are all connected with an external main controller and 220V mains supply, and the main controller can be conventional known equipment for controlling a computer and the like.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but is not limited to the hydraulic pipe, worm, etc. for realizing the telescopic and rotating functions, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof. 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 (3)
1. Variable wind power generation fan blade, including main part fan blade, its characterized in that: the main body fan blade is arranged on a vertical shaft (11), the vertical shaft (11) is connected with a generator main body, an adjusting mechanism is arranged on the main body fan blade, the adjusting mechanism comprises a driving device, a transmission mechanism, a telescopic mechanism and an auxiliary fan blade mechanism, the driving device is arranged on the main body fan blade, the auxiliary fan blade mechanism is in rotary connection with the telescopic mechanism, the driving device is connected with the auxiliary fan blade mechanism through the transmission mechanism, the telescopic mechanism is connected with the main body fan blade, the main body fan blade comprises a first fan blade (1), the first fan blade (1) is fixedly connected with the vertical shaft (11), a support (2) is fixedly connected to the first fan blade (1), the driving device, the transmission mechanism and the telescopic mechanism are arranged on the support (2), the telescopic mechanism comprises a support plate (3) and a first hydraulic device (12), one end of the support plate (3) is in plug-in connection with the support plate (3), the other end of the first hydraulic device is fixedly connected with the support plate (3), the auxiliary fan blade mechanism is fixedly connected with the support plate (2), the auxiliary fan blade mechanism is fixedly connected with a gear (8) and is arranged on the support plate (3) and is connected with the support plate (10) through the first fan blade (8), the transmission mechanism comprises a worm (4), a first transmission shaft (5), a first support (7) and a first driven bevel gear (14), wherein the worm (4) and the first transmission shaft (5) are respectively arranged on a support plate (3) and a support (2) through the first support (7), one end of the worm (4) is connected with a gear (8) in a meshed mode, one end of the other end of the worm (4) is connected with one end of the first transmission shaft (5) in a spliced mode, the other end of the first transmission shaft (5) is fixedly connected with the first driven bevel gear (14), the first driven bevel gear (14) is connected with a driving device, the driving device comprises a first stepping motor (6), a first driving bevel gear (13) and a fixing frame (9), the fixing frame (9) is fixedly connected to the upper surface of the support (2), the output end of the first stepping motor (6) is fixedly connected with the first driving bevel gear (13), and the first driving bevel gear (13) is fixedly connected with the first driven bevel gear (14).
2. A variable wind power generation blade according to claim 1, wherein: the length of the insertion between the bracket (2) and the supporting plate (3) and the length of the insertion between the worm (4) and the first transmission shaft (5) are larger than the maximum working stroke of the first hydraulic device (12).
3. A variable wind power generation blade according to any of claims 1-2, characterized in that: one first fan blade (1) can be matched with one or more groups of transmission mechanisms, auxiliary fan blade mechanisms and telescopic mechanisms, and each group of transmission mechanisms can be integrally driven by one group of driving devices or independently driven by a plurality of groups of driving devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122672234.9U CN219711718U (en) | 2021-11-03 | 2021-11-03 | Variable wind power generation fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122672234.9U CN219711718U (en) | 2021-11-03 | 2021-11-03 | Variable wind power generation fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219711718U true CN219711718U (en) | 2023-09-19 |
Family
ID=88001437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122672234.9U Active CN219711718U (en) | 2021-11-03 | 2021-11-03 | Variable wind power generation fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219711718U (en) |
-
2021
- 2021-11-03 CN CN202122672234.9U patent/CN219711718U/en active Active
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