CN212690451U - Cross-flow fan blade and cross-flow fan - Google Patents
Cross-flow fan blade and cross-flow fan Download PDFInfo
- Publication number
- CN212690451U CN212690451U CN202021020468.4U CN202021020468U CN212690451U CN 212690451 U CN212690451 U CN 212690451U CN 202021020468 U CN202021020468 U CN 202021020468U CN 212690451 U CN212690451 U CN 212690451U
- Authority
- CN
- China
- Prior art keywords
- injection molding
- fan blade
- shaft
- cross
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001746 injection moulding Methods 0.000 claims abstract description 88
- 239000004744 fabric Substances 0.000 claims abstract description 19
- 238000003466 welding Methods 0.000 claims description 38
- 238000013016 damping Methods 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 230000035939 shock Effects 0.000 abstract description 5
- 239000004033 plastic Substances 0.000 description 17
- 229920003023 plastic Polymers 0.000 description 17
- 238000000034 method Methods 0.000 description 11
- 238000000465 moulding Methods 0.000 description 11
- 241001391944 Commicarpus scandens Species 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a cross-flow fan blade and cross-flow fan, this cross-flow fan blade include end cover subassembly, shaft cover subassembly and a plurality of middle section fan blades, the end cover subassembly includes injection molding end cover, axle sleeve and shock attenuation cloth department, the central point that shock attenuation cloth department is embedded at the injection molding end cover puts, the axle sleeve inlays in the central point that the shock attenuation cloth department puts; the shaft cover assembly comprises an injection molding shaft cover, a support shaft and end blades, the end blades are fixedly connected to the end face, close to the middle-section fan blade, of the injection molding shaft cover, and the support shaft is embedded in the center of the injection molding shaft cover; the middle-section fan blade comprises a middle-section blade and a middle-section mounting piece, and the middle-section blade is fixedly connected to the end face, close to the injection molding end cover, of the middle-section mounting piece; the end part blades are fixedly connected to the end face, close to the injection molding end cover, of the middle section mounting piece, and the middle section blades are fixedly connected to the injection molding end cover. The cross-flow fan blade avoids the phenomenon of stress concentration by changing the connection structure of the cross-flow fan blade, and improves the rigidity of the structure of the cross-flow fan blade.
Description
Technical Field
The utility model relates to a fan blade structure and fan, concretely relates to cross-flow fan blade and cross-flow fan.
Background
The existing through-flow fan blade mainly comprises a middle-section fan blade, an end cover assembly and a shaft cover assembly, wherein the three components are fixedly connected in a series ultrasonic welding mode, and the reference is made to the attached drawing 1. The middle-segment fan blades are fixedly connected between the end cover assembly and the shaft cover assembly, and in practical application, different numbers of middle-segment fan blades can be applied according to actual requirements, so that cross-flow fan blades with different lengths can be obtained. The end cover assembly is arranged on one side close to the motor and consists of an injection molding blade, an injection molding end cover and a rubber cloth cover embedded with a metal shaft sleeve, wherein the metal shaft sleeve is used for axially and radially fixing a transmission shaft extending out of the motor, a rubber material is used for damping, and the injection molding blade can be used for adjusting the length of the through-flow fan blade and meeting the length smaller than the length of a middle section of the motor. The shaft cover assembly is arranged at the other end far away from the motor, is mainly used for supporting the other end of the cross-flow fan blade and consists of a steel shaft embedded in the injection molding shaft cover, a welding groove used for welding and fixing with the middle-section fan blade is formed in the end face of the injection molding shaft cover, and the steel shaft extends to the outer side and is inserted into the bearing rubber ring.
Furthermore, in the actual use process, the stress of the two end parts of the cross-flow fan blade is larger; the inner part of the end cover is provided with the rubber cloth strip which can absorb shock and offset partial acting force, and the end cover is not provided with a welding groove, so that the end part of the cross-flow fan blade close to the end cover is not easy to break. However, the shaft cover is only fixedly connected with the outside through the embedded steel shaft, and the shaft cover is provided with a welding groove welded with the middle-segment fan blade, so that the end part of the through-flow fan blade close to the shaft cover is easy to break.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the problem that above-mentioned exists, provide a through-flow fan blade, this through-flow fan blade is through the connection structure who changes self, avoids appearing stress concentration's phenomenon, improves the rigidity of self structure.
Another object of the present invention is to provide a cross-flow fan.
The purpose of the utility model is realized through the following technical scheme:
a cross-flow fan blade comprises an end cover assembly, a shaft cover assembly and a plurality of middle fan blades; the end cover assembly comprises an injection molding end cover, a shaft sleeve and a damping cloth, wherein the damping cloth is embedded in the center of the injection molding end cover, and the shaft sleeve is embedded in the center of the damping cloth;
the shaft cover assembly comprises an injection molding shaft cover, a support shaft and end blades, the end blades are fixedly connected to the end face, close to the middle-section fan blade, of the injection molding shaft cover, and the support shaft is embedded in the center of the injection molding shaft cover;
the middle-section fan blade comprises a middle-section blade and a middle-section mounting piece, and the middle-section blade is fixedly connected to the end face, close to the injection molding end cover, of the middle-section mounting piece;
the end part blades are connected to the end face, close to the injection molding end cover, of the middle section mounting piece through a fixed connection structure, and the middle section blades are connected to the injection molding end cover through the fixed connection structure or connected to the end face, close to the injection molding end cover, of the adjacent middle section mounting piece.
The working principle of the cross-flow fan blade is as follows:
during operation, because the shaft cover subassembly is including moulding plastics shaft cover, back shaft and tip blade, mould plastics the shaft cover earlier with tip blade fixed connection (integrative injection moulding), the rethread ultrasonic bonding mode such as with the tip blade fix on well festival installed part. The middle-section blades are connected to the end faces, close to the injection molding end covers, of the adjacent middle-section mounting pieces in an ultrasonic welding mode and the like, the middle-section blades of the corresponding number are sequentially welded in series according to actual needs, and after the required length is reached, the middle-section blades located at the end portions are connected to the injection molding end covers in an ultrasonic welding mode and the like. In the actual working process, the blade is positioned at the end part far away from the motor, and the blade at the end part and the injection molding shaft cover are integrally formed and have better rigidity, so that the blade is not easy to break due to external force. The injection molding end cover is positioned at the end part close to the motor, the injection molding end cover is fixedly connected with the middle-section blade through ultrasonic welding and the like in the later-stage assembly process, but the injection molding end cover is embedded with the damping cloth driver, so that in the process of rotating air supply, the damping cloth driver can offset partial acting force, the stress at the joint of the injection molding end cover and the middle-section blade is reduced, and the stability of the structure is protected.
Furthermore, the matching mode of the shaft sleeve and the motor comprises an outer fastening mode and an inner fastening mode, wherein the outer fastening mode refers to a mode that the shaft sleeve extends in the direction far away from the middle-section fan blade, the output shaft of the motor is matched with the outer side of the through-flow fan blade, the inner fastening mode refers to a mode that the shaft sleeve extends in the direction close to the middle-section fan blade, and the output shaft of the motor is matched with the inner side of the through-flow fan blade. The utility model discloses in, owing to mould plastics the end cover cancellation blade, at injection moulding's in-process, only need accomplish the end cover of moulding plastics can, moreover the end cover of moulding plastics is symmetrical part, and the structure is fairly simple. Therefore, the relative position of the shaft sleeve during injection molding can be switched according to the actual assembly requirement without replacing an injection mold. If the assembling mode is an external fastening mode, the shaft sleeve can be placed close to the outside before injection molding, so that the injection molded shaft sleeve extends to the outer side of the injection molding end cover relative to the middle-segment fan blade; similarly, if the assembly mode is an internal fastening mode, the shaft sleeve can be placed in the internal side before injection molding, so that the shaft sleeve after injection molding extends towards the inner side of the injection molding end cover relative to the middle-segment fan blade; like this, through a set of injection mold, can realize the switching of outer fastening mode and interior fastening mode simply, low in production cost.
The utility model discloses a preferred scheme, wherein, realize fixed connection through ultrasonic bonding's mode between end cover subassembly, axle cap subassembly and the well section fan blade. Of course, the connection may be made by other fastening means, such as snapping, riveting, etc.
Preferably, the end face of the injection molding end cover, which is close to the middle-segment fan blade, is provided with a welding groove; and a welding groove is formed in the end face, close to the injection molding shaft cover, of the middle section mounting part. Through above-mentioned structure, when the assembly welding, in earlier aim at the tip blade and insert the welding groove on the well section installed part, aim at the well section blade of well section fan blade and insert the welding groove of adjacent well section installed part or the welding groove on the end cover of moulding plastics, the fastening that rethread ultrasonic welding technique realized the object links to each other.
Furthermore, the number of the welding grooves in the injection molding shaft cover is the same as that of the middle blades of the middle fan blade, and the number of the welding grooves in the middle mounting piece is the same as that of the end blades and the middle blades.
Further, the welding groove on the middle-section mounting part and the middle-section blades are arranged in a staggered mode, so that the middle-section blades on two sides of the middle-section mounting part can be prevented from being connected to the same position, stress concentration is avoided, and structural rigidity is improved.
The utility model discloses an optimal scheme, wherein, well festival fan blade is equipped with a plurality ofly, and end to end at the axle head of moulding plastics and between the end cover of moulding plastics.
The utility model discloses a preferred scheme, wherein, the axle cap of said injection moulding and end blade are integrated to be injection moulded; the middle blade and the middle mounting piece are integrally formed in an injection molding mode.
The utility model discloses a preferred scheme, wherein, the shock attenuation cloth department is made by rubber materials.
The utility model discloses a preferred scheme, wherein, the axle sleeve is toward the direction straight line extension of keeping away from the well section fan blade, and cooperates with the output shaft of motor. Through the structure, the cross-flow fan blade is connected with the motor in an external fastening mode, so that rotating power is obtained.
The utility model discloses a preferred scheme, wherein, the axle sleeve is toward the direction straight line extension that is close to the well section fan blade, and with the output shaft cooperation of motor. Through the structure, the through-flow fan blade is connected with the motor in an internal fastening mode, so that rotating power is obtained.
A cross-flow fan comprises the cross-flow fan blade and a motor.
Compared with the prior art, the utility model following beneficial effect has:
1. the utility model discloses a change traditional connection structure, the cancellation is moulded plastics the blade on the end cover, and is moulding plastics the newly-increased blade that sets up on the axle cap to a brand-new through-flow fan blade of reverse gesture structure, thereby avoid appearing stress concentration's phenomenon effectively, improve the rigidity of self structure.
2. The utility model discloses in, owing to mould plastics the end cover cancellation blade, at injection moulding's in-process, only need accomplish the end cover of moulding plastics can, moreover the end cover of moulding plastics is symmetrical part, and the structure is fairly simple. Therefore, the relative position of the shaft sleeve during injection molding can be switched according to the actual assembly requirement without replacing an injection mold. If the assembling mode is an external fastening mode, the shaft sleeve can be placed close to the outside before injection molding, so that the injection molded shaft sleeve extends to the outer side of the injection molding end cover relative to the middle-segment fan blade; similarly, if the assembly mode is an internal fastening mode, the shaft sleeve can be placed in the internal side before injection molding, so that the shaft sleeve after injection molding extends towards the inner side of the injection molding end cover relative to the middle-segment fan blade; like this, through a set of injection mold, can realize the switching of outer fastening mode and interior fastening mode simply, low in production cost.
Drawings
Fig. 1 is an exploded perspective view of a cross-flow fan blade in the prior art.
Fig. 2 is an exploded perspective view of one embodiment of the cross-flow fan blade of the present invention.
Fig. 3 is a three-dimensional structure diagram of one embodiment of the cross-flow fan blade of the present invention.
Fig. 4 is an exploded perspective view of another embodiment of the cross-flow fan blade according to the present invention.
Fig. 5 is a three-dimensional structure view of another embodiment of the cross-flow fan blade of the present invention.
Detailed Description
In order to make those skilled in the art understand the technical solution of the present invention well, the present invention will be further described below with reference to the following examples and drawings, but the embodiments of the present invention are not limited thereto.
Referring to fig. 2-5, the cross-flow fan in this embodiment includes an end cover assembly, a shaft cover assembly, and a plurality of middle-segment fans connected end to end between the end cover assembly and the shaft cover assembly. The end cover component comprises an injection molding end cover 1, a shaft sleeve 2 made of a metal material and a damping cloth 3 made of a rubber material, wherein the damping cloth 3 is embedded in the center of the injection molding end cover 1, and the shaft sleeve 2 is embedded in the center of the damping cloth 3. The shaft cover component comprises an injection molding shaft cover 4, a supporting shaft 5 and end blades 6, wherein the end blades 6 are integrally injection molded on the end face, close to the middle-segment fan blade, of the injection molding shaft cover 4, and the supporting shaft 5 is embedded in the center of the injection molding shaft cover 4. The middle-section fan blade comprises a middle-section blade 7 and a middle-section mounting piece 8, wherein the middle-section blade 7 is integrally injection-molded on the end face, close to the injection-molded end cover 1, of the middle-section mounting piece 8. The end part blades 6 are connected to the end face, close to the injection molding end cover 1, of the middle section mounting piece 8 through a fixed connection structure, and the middle section blades 7 are connected to the injection molding end cover 1 through a fixed connection structure or connected to the end face, close to the injection molding end cover 1, of the adjacent middle section mounting piece 8.
Specifically, the end cover assembly, the shaft cover assembly and the middle fan blade are fixedly connected in an ultrasonic welding mode. Of course, the connection may be made by other fastening means, such as snapping, riveting, etc.
Referring to fig. 2-5, the end face of the injection end cover 1 close to the middle-segment fan blade is provided with a welding groove; and a welding groove is formed in the end face, close to the injection molding shaft cover 4, of the middle section mounting part 8. Through the structure, when the assembly welding is carried out, the end part blades 6 are aligned and inserted into the welding grooves in the middle section mounting parts 8, the middle section blades 7 of the middle section blades are aligned and inserted into the welding grooves in the adjacent middle section mounting parts 8 or the welding grooves in the injection molding end cover 1, and then the fastening of objects is realized through the ultrasonic welding technology.
Further, the number of the welding grooves on the injection molding shaft cover 4 is the same as that of the middle blades 7 of the middle fan blades, and the number of the welding grooves on the middle mounting piece 8 is the same as that of the end blades 6.
Further, the welding groove on the middle-section mounting part 8 and the middle-section blades 7 are arranged in a staggered mode, so that the middle-section blades 7 on two sides of the middle-section mounting part 8 can be prevented from being connected to the same position, stress concentration is avoided, and structural rigidity is improved.
Referring to fig. 2-3, the shaft sleeve 2 extends linearly in a direction away from the middle-segment fan blade and is matched with an output shaft of the motor. Through the structure, the cross-flow fan blade is connected with the motor in an external fastening mode, so that rotating power is obtained.
Referring to fig. 4-5, the shaft sleeve 2 extends linearly in a direction close to the middle-segment fan blade and is matched with an output shaft of the motor. Through the structure, the through-flow fan blade is connected with the motor in an internal fastening mode, so that rotating power is obtained.
The cross-flow fan in the embodiment is arranged in an air conditioner or a fan (such as a household air conditioner, a special air conditioner, an air curtain air conditioner or a tower fan and the like), and comprises the cross-flow fan blade and a motor.
Referring to fig. 2 to 5, the working principle of the cross-flow fan blade in this embodiment is as follows:
during operation, because the shaft cover subassembly is including moulding plastics shaft cover 4, back shaft 5 and tip blade 6, mould plastics shaft cover 4 earlier with tip blade 6 fixed connection (integrative injection moulding), the rethread ultrasonic bonding mode such as with tip blade 6 fix on well festival installed part 8. The middle-section blades 7 are connected to the end faces, close to the injection molding end cover 1, of the adjacent middle-section mounting pieces 8 in an ultrasonic welding mode and the like, the middle-section blades of the corresponding number are sequentially welded in series according to actual needs, and after the required length is achieved, the middle-section blades 7 located at the end portions are connected to the injection molding end cover 1 in an ultrasonic welding mode and the like. In the actual working process, the end part of the blade 6 is far away from the motor, and the end part blade and the injection molding shaft cover 4 are integrally formed and have better rigidity, so that the blade is not easy to break due to external force. The injection molding end cover 1 is fixedly connected with the middle blade 7 through ultrasonic welding and the like in the later-stage assembly process, but the damping cloth band 3 is embedded in the injection molding end cover 1, so that partial acting force can be offset by the damping cloth band 3 in the rotary air supply process, the stress at the connection position of the injection molding end cover 1 and the middle blade 7 is reduced, and the stability of the structure is protected.
Further, the matching mode of the shaft sleeve 2 and the motor comprises an outer fastening mode and an inner fastening mode, wherein the outer fastening mode refers to a mode that the shaft sleeve 2 extends in the direction far away from the middle-section fan blade, the output shaft of the motor is matched with the outer side of the through-flow fan blade, the inner fastening mode refers to a mode that the shaft sleeve 2 extends in the direction close to the middle-section fan blade, and the output shaft of the motor is matched with the inner side of the through-flow fan blade. The utility model discloses in, owing to mould plastics end cover 1 and cancel the blade, at injection moulding's in-process, only need accomplish mould plastics end cover 1 can, moreover it is symmetrical part that end cover 1 of moulding plastics is, and the structure is fairly simple. In this way, the relative position of the sleeve 2 during injection molding can be switched according to actual assembly requirements without changing the injection mold. If the assembly mode is an external fastening mode, as shown in fig. 2-3, before injection molding, the shaft sleeve 2 can be placed close to the outside, so that the injection molded shaft sleeve 2 extends towards the outer side of the injection molding end cover 1 relative to the middle-segment fan blade; similarly, if the assembly mode is an internal fastening mode, as shown in fig. 4-5, before injection molding, the shaft sleeve 2 can be placed inward, so that the injection molded shaft sleeve 2 extends towards the inner side of the injection molding end cover 1 relative to the middle-segment fan blade; like this, through a set of injection mold, can realize the switching of outer fastening mode and interior fastening mode simply, low in production cost.
The above is the preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (10)
1. A cross-flow fan blade comprises an end cover assembly, a shaft cover assembly and a plurality of middle fan blades; the damping end cover assembly is characterized by comprising an injection molding end cover, a shaft sleeve and a damping cloth, wherein the damping cloth is embedded in the center of the injection molding end cover, and the shaft sleeve is embedded in the center of the damping cloth;
the shaft cover assembly comprises an injection molding shaft cover, a support shaft and end blades, the end blades are fixedly connected to the end face, close to the middle-section fan blade, of the injection molding shaft cover, and the support shaft is embedded in the center of the injection molding shaft cover;
the middle-section fan blade comprises a middle-section blade and a middle-section mounting piece, and the middle-section blade is fixedly connected to the end face, close to the injection molding end cover, of the middle-section mounting piece;
the end part blades are connected to the end face, close to the injection molding end cover, of the middle section mounting piece through a fixed connection structure, and the middle section blades are connected to the injection molding end cover through the fixed connection structure or connected to the end face, close to the injection molding end cover, of the adjacent middle section mounting piece.
2. The cross-flow fan blade of claim 1, wherein the end cover assembly, the shaft cover assembly and the middle-segment fan blade are fixedly connected by ultrasonic welding.
3. The cross-flow fan blade of claim 2, wherein the end face of the injection end cover, which is close to the middle fan blade, is provided with a welding groove; and a welding groove is formed in the end face, close to the injection molding shaft cover, of the middle section mounting part.
4. The cross-flow fan blade of claim 3, wherein the number of the welding grooves on the injection molding shaft cover is the same as that of the middle-segment blades of the middle-segment fan blade, and the number of the welding grooves on the middle-segment mounting piece is the same as that of the end-segment blades.
5. The cross-flow fan blade of claim 3, wherein the welding groove on the middle segment mounting piece is arranged in a staggered manner with the middle segment blade.
6. The cross-flow fan blade of claim 1, wherein a plurality of middle-segment fan blades are arranged and connected end to end between the injection molding shaft cover and the injection molding end cover.
7. The cross-flow fan blade of claim 1, wherein the injection molding shaft cover and the end blade are integrally injection molded; the middle blade and the middle mounting piece are integrally formed in an injection molding mode.
8. The cross-flow fan blade of claim 1, wherein the shaft sleeve extends linearly in a direction away from the middle fan blade and is engaged with an output shaft of the motor.
9. The cross-flow fan blade of claim 1, wherein the shaft sleeve extends linearly in a direction close to the middle fan blade and is engaged with an output shaft of the motor.
10. A crossflow blower comprising a crossflow fan blade as claimed in any one of claims 1 to 9 and a motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021020468.4U CN212690451U (en) | 2020-06-06 | 2020-06-06 | Cross-flow fan blade and cross-flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021020468.4U CN212690451U (en) | 2020-06-06 | 2020-06-06 | Cross-flow fan blade and cross-flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212690451U true CN212690451U (en) | 2021-03-12 |
Family
ID=74889807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021020468.4U Active CN212690451U (en) | 2020-06-06 | 2020-06-06 | Cross-flow fan blade and cross-flow fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212690451U (en) |
-
2020
- 2020-06-06 CN CN202021020468.4U patent/CN212690451U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6848887B2 (en) | Turbofan and mold thereof | |
| EP2416016A2 (en) | Fan and vibration-absorbing boss thereof | |
| EP3767195A1 (en) | Air guide assembly and air conditioner provided with same | |
| US20110014052A1 (en) | Fan with structural support ring | |
| CN212690451U (en) | Cross-flow fan blade and cross-flow fan | |
| CN111608951A (en) | Cross-flow fan blade and cross-flow fan | |
| CN112977049B (en) | Mounting structure of automobile active air inlet grille | |
| CN209402293U (en) | A kind of end cap of outer rotor motor of integrated fan blade | |
| CN110685958A (en) | Fan cover | |
| CN207968135U (en) | Electric machine | |
| CN218920134U (en) | Carbon brush holder assembly | |
| CN206903941U (en) | A kind of outer rotor impeller assembly and the blower fan including the impeller assembly | |
| KR20100021688A (en) | A radiator cooling fan assembly for a vehicle | |
| CN206686059U (en) | A kind of vibrating motor | |
| US11859636B2 (en) | Fan wheel of a motor vehicle | |
| KR100420355B1 (en) | Turbo fan in air-conditioner | |
| CN217814702U (en) | Plastic tray module of shock absorber | |
| CN209908835U (en) | Cross-flow fan blade connecting structure | |
| CN214691628U (en) | Ball bearing | |
| CN212003721U (en) | Axial flow fan and axial flow fan blade unit thereof | |
| CN221380685U (en) | Air duct connecting structure of outer rotor motor and cross-flow fan | |
| CN218669866U (en) | Cooling fan | |
| CN218581880U (en) | Combined blade impeller, fan and gas water heater | |
| CN211351881U (en) | Motor and clothes dryer with same | |
| CN208713882U (en) | Electric tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |