CN221096888U - Fan with fan blade strengthening structure - Google Patents
Fan with fan blade strengthening structure Download PDFInfo
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- CN221096888U CN221096888U CN202322581525.6U CN202322581525U CN221096888U CN 221096888 U CN221096888 U CN 221096888U CN 202322581525 U CN202322581525 U CN 202322581525U CN 221096888 U CN221096888 U CN 221096888U
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- fan
- blades
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- fan blade
- pressing
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- 238000005728 strengthening Methods 0.000 title claims abstract description 30
- 238000003825 pressing Methods 0.000 claims abstract description 55
- 230000002787 reinforcement Effects 0.000 claims description 31
- 230000003014 reinforcing effect Effects 0.000 claims description 28
- 229910000838 Al alloy Inorganic materials 0.000 claims description 16
- 239000000956 alloy Substances 0.000 claims description 15
- 238000004512 die casting Methods 0.000 claims description 11
- 239000003351 stiffener Substances 0.000 claims description 2
- 230000004308 accommodation Effects 0.000 claims 2
- 241000883990 Flabellum Species 0.000 abstract description 4
- 231100000817 safety factor Toxicity 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Abstract
The utility model provides a fan with a fan blade strengthening structure, which comprises a fan body and a strengthening pressure plate. Wherein, the fan body contains: a driving source; a hub rotatably provided to an output shaft of the driving source and provided with a plurality of support seats; and a plurality of fan blades which are respectively embedded in each of the plurality of supporting seats. And, consolidate the platen and press and fix on a plurality of flabellums of fan body, and contain: the pressing plate main body is in a flat plate shape, and an axle hole is formed in the center of the pressing plate main body, and corresponds to the output shaft of the driving source; and the pressing parts are arranged on one side of the pressing plate main body, are respectively provided with a containing cambered surface corresponding to the surface shape of the fan blades, and are respectively attached to one side surface of the fan blades. Through the setting of strengthening the pressure plate piece, the stress that can evenly distribute the flabellum bore, and then prevent that the flabellum from taking place cracked condition.
Description
Technical Field
The present utility model relates to a fan, and more particularly, to a fan with a reinforced structure for evenly distributing stress on fan blades to improve safety.
Background
The large ceiling fan is widely applied to large indoor spaces such as shopping centers, exhibition venues and the like, and is widely applied to industrial fields such as large factories and storage factories of factories, and the like, because the large ceiling fan does not occupy floor space and can manufacture good air convection effect, the air convection in the indoor spaces can be quickened, the effects of air conditioning uniformity and heat dissipation are achieved, and the comfort level of people in the indoor space is improved and the body temperature is reduced.
Generally, a ceiling fan has a power source such as a motor, a hub connected to a rotating shaft of the motor, and a plurality of blades disposed on the hub, and two locking holes are generally disposed on the blades along an extending direction of the blades to be fixed on the hub through the locking holes. However, since the diameter of a large ceiling fan can be 3 meters to 8 meters, the centrifugal inertial kinetic energy of the fan blades will affect the safety of the fan during high speed operation. For example, when the fan is running, the blade may bear a wind pressure of about 3kgf/m 2, so that the blade may rise about 22 cm, and its safety factor may be only about 1.2ul. Further, as can be seen from the stress analysis of the fan blade, the stress breaking point of the fan blade is located at the locking hole near the outer side, when the fan runs for a long time, the stress will concentrate on the locking hole at the outer side to generate cracks, and the fan blade will break under the condition that the fan continues to run.
Therefore, how to design a fan with a reinforced structure of blades, which can evenly distribute stress of the blades of the fan to prevent the blades from breaking under long-term wind pressure load, so as to solve the technical problems in the prior art, is an important subject studied by the inventor of the present utility model.
Disclosure of utility model
In view of the above, the present inventors have accumulated many years of research and practical experience in the related art, and have created a fan with a fan blade reinforcing structure to solve the problems described in the prior art.
In order to solve the above-mentioned problems in the prior art, the present utility model provides a fan with a fan blade strengthening structure, which comprises a fan body and a strengthening pressing member. Wherein, the fan body contains: a driving source; a hub rotatably provided to an output shaft of the driving source and provided with a plurality of support seats; and a plurality of fan blades which are respectively embedded in each of the plurality of supporting seats. And, consolidate the platen and press and fix on a plurality of flabellums of fan body, and contain: the pressing plate main body is in a flat plate shape, and an axle hole is formed in the center of the pressing plate main body, and corresponds to the output shaft of the driving source; and the pressing parts are arranged on one side of the pressing plate main body, are respectively provided with a containing cambered surface corresponding to the surface shape of the fan blades, and are attached to one side surface of each fan blade.
Optionally, the plurality of fan blades are integrally formed by die casting of aluminum alloy materials, the inside of the plurality of fan blades is hollow, and a plurality of fan blade ribs are respectively arranged to separate a plurality of inner cavities.
Optionally, the plurality of internal chambers of the plurality of fan blades are provided with a reinforcement.
Optionally, the reinforcement is extruded and drawn from an aluminum alloy material to form a strip shape.
Alternatively, the opposite sides of the reinforcement are formed as teeth.
Optionally, the reinforcing platen member is formed by die casting an aluminum alloy material, and the plurality of pressing parts respectively comprise a plurality of platen ribs, and the plurality of platen ribs are arranged between the platen main body and the accommodating cambered surface to connect the platen main body and the accommodating cambered surface.
Optionally, the plurality of fan blades are respectively provided with a first locking hole at one end embedded in the hub, the reinforced pressing plate piece is provided with a plurality of second locking holes corresponding to the plurality of first locking holes, and the plurality of second locking holes penetrate through the pressing plate main body and the pressing part.
Optionally, one side of the cross section of the fan blade is arc-shaped, the other side of the cross section of the fan blade is flat, and the number of the plurality of fan blades is the same as the number of the plurality of pressing parts.
Optionally, a plurality of supporting seats are arranged between the hub and the fan blades, and the supporting seats and the reinforcing pressing plate piece are respectively arranged on two opposite side surfaces of the fan blades.
In summary, the fan blade with the fan blade strengthening structure is provided with only a single locking hole, and the upper sides of the plurality of fan blades are provided with the strengthening pressing plate pieces, the strengthening pressing plate pieces are integrally molded by die casting with aluminum alloy materials and are integrally pressed and attached to the plurality of fan blades, so that when the fan rotates, the fan blades are lifted to be pressed and buffered by the strengthening pressing plate pieces, and the stress born by the fan blades can be evenly distributed, thereby preventing the situation that cracks and even fracture occur when the fan blades bear the stress for a long time, and being beneficial to improving the overall safety of the fan.
In addition, the plurality of fan blades are integrally molded by die casting of aluminum alloy materials, the inside of the fan blades is hollow, and a plurality of fan blade ribs are arranged inside the fan blades so as to separate a plurality of inner cavities. The inside of the plurality of chambers is further provided with a long reinforcement formed by extrusion and drawing of aluminum alloy materials, and the long reinforcement is forced to be extruded into the inner chamber of the fan blade through high oil pressure. Through the arrangement of the reinforcement, the rigidity of the whole structure of the fan blade can be enhanced, so that the fan blade has better resistance to metal fatigue without breaking under the reciprocating action of lifting and lowering of wind pressure for a long time, thereby being beneficial to improving the safety of the whole fan.
Drawings
In order to more clearly illustrate the technical solution of the present utility model, the drawings that are required to be used in the embodiments will be briefly described below;
FIG. 1 is a schematic view of a fan with a fan blade strengthening structure according to an embodiment of the utility model;
FIG. 2 is a schematic view of a top side of a reinforced platen member of a fan with a fan blade reinforcing structure according to an embodiment of the present utility model;
FIG. 3 is a schematic view of the bottom side of a reinforced platen member of a fan with a fan blade reinforcing structure according to an embodiment of the present utility model;
FIG. 4 is a schematic view of a top side of a hub of a fan with a blade reinforcement structure according to an embodiment of the present utility model;
FIG. 5 is a schematic view of a fan blade and a stiffener of a fan with a blade strengthening structure according to an embodiment of the present utility model; and
Fig. 6 is a schematic diagram illustrating a safety factor distribution of a fan blade of a fan with a blade strengthening structure according to an embodiment of the utility model.
Description of the reference numerals
1: A fan with a fan blade strengthening structure; 10: a hub; 11: a support base; 20: a fan blade; 21: fan blade ribs; 22: an internal chamber; 23: a reinforcement; 24: a first locking hole; 25: locking the hole; 30: reinforcing the platen member; 31: a platen body; 311: a shaft hole; 312: a second locking hole; 32: a pressing part; 321: accommodating the cambered surface; 322: and (5) pressing plate ribs.
Detailed Description
For the purpose of understanding the technical features, aspects and advantages of the present utility model, as well as the advantages and capabilities thereof, the present utility model will be described in detail in the following detailed description of the embodiments with reference to the drawings, but the drawings are merely schematic and auxiliary illustrations, and are not necessarily true proportions or exact arrangements, so that the proportion or arrangement of the drawings should not be construed as limiting the scope of the present utility model in practical application, as will be described in detail herein.
It will be understood that, although the terms "first," "second," etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Accordingly, the following discussion of "first component," "first part," "first region," "first layer," and/or "first portion" may be referred to as "second component," "second part," "second region," "second layer," and/or "second portion" without departing from the spirit and teachings of the present utility model.
Furthermore, the terms "comprises," "comprising," and/or "includes" specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and/or groups thereof.
Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It will be appreciated that terms such as those defined in commonly used dictionaries should be interpreted as having a definition that is consistent with their meaning in the context of the relevant art and the present utility model and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The present utility model will be described in further detail hereinafter with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and are not meant to limit the utility model.
Referring to fig. 1 to 4, fig. 1 is a schematic diagram of a fan with a fan blade strengthening structure according to an embodiment of the utility model; FIG. 2 is a schematic view of a top side of a reinforced platen member of a fan with a fan blade reinforcing structure according to an embodiment of the present utility model; FIG. 3 is a schematic view of the bottom side of a reinforced platen member of a fan with a fan blade reinforcing structure according to an embodiment of the present utility model; fig. 4 is a schematic diagram of a top side of a hub of a fan with a fan blade reinforcing structure according to an embodiment of the utility model.
As shown in fig. 1 to 4, an embodiment of the present utility model provides a fan 1 with a fan blade strengthening structure, which includes a fan body and a strengthening pressure plate 30. Wherein, the fan body contains: a driving source; a hub 10 rotatably provided to an output shaft of the drive source, and provided with a plurality of support seats 11; and a plurality of blades 20 respectively fitted to each of the plurality of support seats 11 of the hub 10. The reinforcement pressing member 30 is pressed and fixed on the plurality of blades 20 of the fan body, and includes: the pressing plate main body 31 is in a flat plate shape, and an axle hole 311 is arranged at the center of the pressing plate main body and corresponds to the output shaft of the driving source; and a plurality of pressing parts 32 disposed on one side of the pressing plate main body 31, wherein the pressing parts 32 respectively have a holding arc surface 321 corresponding to the surface shape of the fan blades 20, and the holding arc surfaces 321 respectively lean against one side surface of the fan blades 20.
In the drawings, the driving source of the fan body is not shown for simplicity of the drawings. Specifically, in the present embodiment, the driving source of the fan body may be an external rotation type driving motor, and the hub 10 is rotatably connected to the output shaft of the external rotation motor, so that the hub 10 is driven to rotate by the driving source, wherein the external rotation motor as the driving source has the same structure composition as the general motor, and will not be described herein. In other embodiments, other kinds of motors such as an inner rotation motor, a stepping motor, etc. may be used as the driving source of the fan body, to which the present utility model is not limited.
Further, the plurality of blades 20 are strip-shaped blades integrally molded by die casting with aluminum alloy, and the inside of the plurality of blades 20 is hollow, and has a cross section with one side being circular arc and the other side being flat, and one side of the blade 20 being circular arc is the upper end surface thereof. In addition, the hollow inner part of each fan blade 20 is respectively provided with a plurality of fan blade ribs 21 to separate a plurality of inner cavities 22, which can maintain the structural strength of the fan blade 20 and is beneficial to reducing the weight and manufacturing cost of the fan blade 20. One end of the fan blade 20 is a combined end adapted to correspond to the supporting seat 11 of the hub 10 to be clamped in the supporting seat 11 of the hub 10, and the combined end of the fan blade 20 is provided with a single first locking hole 24 for matching with a locking member such as a screw, a nut, etc. to fix the fan blade 20 in the supporting seat 11 of the hub 10.
The present utility model aims to reduce the fracture phenomenon caused by long-term stress of specific parts of the blades when the fan body is in operation, so in the present embodiment, the upper end surfaces of the blades 20 of the fan body are provided with the reinforcing pressing member 30, which is integrally formed by die casting with aluminum alloy material, so that the pressing portions 32 of the reinforcing pressing member 30 can be integrally pressed and attached to the blades 20. By the arrangement of the reinforcement pressing member 30, the magnitude of the wind pressure on the fan blade 20 when the fan body is running can be reduced, the stress distribution on the fan blade 20 can be more even, and the stress on the first locking hole 24 of the fan blade 20 can be reduced.
Further, the reinforcing platen member 30 is integrally formed by die casting with an aluminum alloy material, and each pressing portion 32 includes a plurality of platen ribs 322, and the plurality of platen ribs 322 are disposed between the platen body 31 and the accommodating cambered surface 321 of each pressing portion 32 to connect the platen body 31 and the accommodating cambered surface 321. In the present embodiment, each of the pressing ribs 322 has a thickness of about 3 mm, and the total weight of the reinforcing pressing member 30 is about 2.4 kg, so that the reinforcing pressing member 30 has the advantages of light weight, high efficiency, low manufacturing cost, and the like. In the present embodiment, the fan body includes five blades 20, and the reinforcing pressing member 30 includes five pressing portions 32 corresponding to the number of the blades 20, and has a five-equally symmetrical configuration.
As described above, each fan blade 20 is provided with a single first locking hole 24 at the combined end which is engaged with the hub 10, and the reinforcing platen member 30 is provided with a plurality of second locking holes 312 corresponding to the first locking holes 24 of each fan blade 20, and the plurality of second locking holes 312 penetrate the platen body 31 and the pressing portion 32, so that locking members such as screws, nuts, etc. can be engaged to lock the hub 10, the fan blade 20, and the reinforcing platen member 30 to each other.
In the above embodiment, the driving source of the fan body can rotate the driving hub 10 forward to drive the fan blades 20 to rotate forward to discharge air toward the lower side in the vertical direction. Or the driving source of the fan body can reversely rotate the driving hub 10 to drive the fan blades 20 to reversely rotate to discharge air towards the upper side in the vertical direction. In this case, as shown in fig. 4, since the hub 10 is provided with the plurality of supporting seats 11 corresponding to the plurality of blades 20, the plurality of supporting seats 11 and the reinforcing pressing member 30 are respectively disposed on two opposite sides of the plurality of blades 20, so that when the blades 20 reversely rotate to discharge air upwards, the plurality of supporting seats 11 can support the plurality of blades 20, thereby reducing the magnitude of the downward pressure of the blades 20 due to the wind pressure when the fan body is operated, and making the stress distribution on the blades 20 more even.
Referring to fig. 5 and 6, fig. 5 is a schematic view of a fan blade and a reinforcement member of a fan with a blade strengthening structure according to an embodiment of the utility model; fig. 6 is a schematic diagram illustrating a safety factor distribution of a fan blade of the fan with the blade strengthening structure according to an embodiment of the utility model.
As shown in fig. 1 to 4, the embodiment of the present utility model provides a fan 1 with a fan blade strengthening structure, which also includes a fan body and a strengthening pressing member 30, and the specific structure and configuration of the fan body and the strengthening pressing member 30 are the same as those of the embodiment described above with reference to fig. 1 to 3, and will not be repeated herein.
It should be noted that, in the present embodiment, as shown in fig. 5, the plurality of inner chambers 22 of each fan blade 20 is further provided with at least one reinforcement member 23, and the at least one reinforcement member 23 is extruded and drawn with aluminum alloy material to form a strip shape, and is forced to be extruded into the inner chamber 22 of the fan blade 20 by high oil pressure. Also, both side surfaces of the reinforcement member 23 are formed in a tooth shape so that the reinforcement member 23 can be integrally caught in the inner chamber 22 without loosening.
Through the arrangement of the reinforcement 23, the support inside the fan blade 20 can be enhanced, and when the tail end suspension part of the fan blade 20 is subjected to wind pressure lifting and dead weight descending to generate reciprocating displacement, the generated stress can be absorbed by the reinforcement 23 arranged in the inner cavity 22 of the fan blade 20 to resist load, so that the stress is prevented from being absorbed by the fan blade 20 body alone, and therefore, the capability of resisting metal fatigue fracture of the fan blade 20 can be improved.
Specifically, in the present embodiment, two reinforcing members 23 with different lengths are disposed in the inner chambers 22 of the fan blades 20 at two sides of the first locking hole 24, and the length of the reinforcing member 23 is greater than that of a portion of the fan blades 20 pressed by the reinforced pressing member 30, for example, the lengths of the two reinforcing members 23 may be 540 mm and 400 mm, respectively, but the present utility model is not limited thereto. In other embodiments, the number and length of the reinforcement members 23 may be arbitrarily configured according to practical requirements and manufacturing cost, which is not limited by the present utility model. With the above configuration, the ability of each fan blade 20 to withstand deformation can be further improved on the basis of the reinforcement provided by the reinforcement 23.
Referring next to fig. 6, fig. 6 shows a safety factor distribution of the fitting portion of the fan blade 20 in a case where the reinforcement pressing member 30 is installed and the inner chamber 22 of the fan blade 20 is provided with the reinforcement 23, and two regions where the safety factors are different are indicated by broken lines. As shown in fig. 5, in the present embodiment, only a single first locking hole 24 is provided on the fan blade 20, and the locking hole 25 of the fan blade 20 in the prior art is schematically shown by using a dotted line, and since the locking hole 25 of the fan blade 20 in the prior art is disposed at the junction adjacent to two areas with different safety factors, the locking hole 25 is easy to be a stress breaking point under long-term operation of the fan, and the fan blade 20 is broken.
In view of this, in the present embodiment, compared with the fan blade with two locking holes in the prior art, the fan blade 20 is provided with only one first locking hole 24, and by removing the original locking hole 25, the situation that the fan blade 20 is broken due to the locking hole 25 being provided at the junction between two areas with different safety factors can be avoided.
In addition, in the present embodiment, the reinforcing platen member 30 and the reinforcing member 23 are further provided, and the first locking hole 24 is covered by the reinforcing platen member 30 to reduce the stress born by the fan blade 20 at the first locking hole 24, so as to effectively prevent the breakage of the fan blade 20 at the first locking hole 24 in the case of long-term stress.
In summary, the fan blade with the fan blade strengthening structure is provided with only a single locking hole, and the upper sides of the plurality of fan blades are provided with the strengthening pressing plate pieces, the strengthening pressing plate pieces are integrally molded by die casting with aluminum alloy materials and are integrally pressed and attached to the plurality of fan blades, so that when the fan rotates, the fan blades are lifted to be pressed and buffered by the strengthening pressing plate pieces, and the stress born by the fan blades can be evenly distributed, thereby preventing the situation that cracks and even fracture occur when the fan blades bear the stress for a long time, and being beneficial to improving the overall safety of the fan.
In addition, the plurality of fan blades are integrally molded by die casting of aluminum alloy materials, the inside of the fan blades is hollow, and a plurality of fan blade ribs are arranged inside the fan blades so as to separate a plurality of inner cavities. The inside of the plurality of chambers is further provided with a long reinforcement formed by extrusion and drawing of aluminum alloy materials, and the long reinforcement is forced to be extruded into the inner chamber of the fan blade through high oil pressure. Through the arrangement of the reinforcement, the rigidity of the whole structure of the fan blade can be enhanced, so that the fan blade has better resistance to metal fatigue without breaking under the reciprocating action of lifting and lowering of wind pressure for a long time, thereby being beneficial to improving the safety of the whole fan.
The foregoing is by way of example only and is not intended as limiting. Any equivalent modifications or variations to the present utility model without departing from the spirit and scope thereof are intended to be included in the following claims.
Claims (9)
1. A fan having a fan blade strengthening structure, comprising:
A fan body comprising:
a driving source;
A hub rotatably arranged on an output shaft of the driving source and provided with a plurality of supporting seats; and
A plurality of fan blades respectively embedded in each of the plurality of supporting seats; and a reinforcing pressing member pressed and fixed on the fan blades of the fan body and comprising:
The pressing plate main body is in a flat plate shape, and a shaft hole is formed in the center of the pressing plate main body and corresponds to the output shaft of the driving source; and
The pressing parts are arranged on one side of the pressing plate main body, each pressing part is provided with a containing cambered surface corresponding to the surface shape of each fan blade, and each containing cambered surface is respectively attached to one side face of each fan blade.
2. The fan with blade strengthening structure as claimed in claim 1, wherein the plurality of blades integrally molded by die casting of aluminum alloy material are hollow, and a plurality of blade ribs are respectively provided to divide a plurality of inner chambers.
3. The fan with blade strengthening structure of claim 2, wherein the plurality of internal chambers of the plurality of blades are provided with a stiffener.
4. The fan with blade reinforcement structure according to claim 3, wherein the reinforcement member extruded and drawn from an aluminum alloy material is elongated.
5. The fan with blade reinforcement structure of claim 3, wherein opposite sides of the reinforcement are formed in a tooth shape.
6. The fan with the fan blade reinforcing structure according to claim 1, wherein the plurality of press-fit pieces of the reinforcing press plate member integrally formed by die casting of an aluminum alloy material respectively include a plurality of press plate ribs disposed between the press plate body and the accommodation cambered surface to connect the press plate body and the accommodation cambered surface.
7. The fan with fan blade reinforcement structure according to claim 1, wherein the fan blades are respectively provided with a first locking hole at one end embedded in the hub, the reinforcement platen is provided with a plurality of second locking holes corresponding to the first locking holes, and the second locking holes penetrate through the platen body and the pressing part.
8. The fan with the fan blade reinforcing structure according to claim 1, wherein one side of the cross section of the fan blade is arc-shaped, the other side is flat, and the number of the plurality of fan blades is the same as the number of the plurality of pressing parts.
9. The fan with reinforced structure of claim 1, wherein a plurality of supporting seats are disposed between the hub and the plurality of blades, and the plurality of supporting seats and the reinforced pressing plate are disposed on two opposite sides of the plurality of blades, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322581525.6U CN221096888U (en) | 2023-09-22 | 2023-09-22 | Fan with fan blade strengthening structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322581525.6U CN221096888U (en) | 2023-09-22 | 2023-09-22 | Fan with fan blade strengthening structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221096888U true CN221096888U (en) | 2024-06-07 |
Family
ID=91327161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322581525.6U Active CN221096888U (en) | 2023-09-22 | 2023-09-22 | Fan with fan blade strengthening structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221096888U (en) |
-
2023
- 2023-09-22 CN CN202322581525.6U patent/CN221096888U/en active Active
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