CN214468993U - Noise reduction device and fan blade - Google Patents
Noise reduction device and fan blade Download PDFInfo
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- CN214468993U CN214468993U CN202120019931.1U CN202120019931U CN214468993U CN 214468993 U CN214468993 U CN 214468993U CN 202120019931 U CN202120019931 U CN 202120019931U CN 214468993 U CN214468993 U CN 214468993U
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- fan blade
- intermediate body
- inner shell
- shell
- noise reduction
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Abstract
The utility model relates to a device and fan blade of making an uproar falls relates to fan technical field for solve the big technical problem of fan blade noise. The utility model discloses a device of making an uproar falls, establish including inner shell, cover the outside midbody of inner shell and cover are established the outside shell of midbody can play the buffering, reduce the effect of vibrations and noise reduction through setting up the midbody of being made by non-metallic elastic material between inner shell and shell to when making it be applied to the fan blade, can play the effect of buffering shock attenuation to the fan blade, thereby show the noise that reduces the fan blade, be favorable to the quality promotion of fan blade, and improve customer's satisfaction.
Description
Technical Field
The utility model relates to a fan technical field relates to a device and fan blade of making an uproar falls in particular.
Background
The middle rotating shaft hole of the axial flow fan blade of the traditional air conditioner outdoor unit is generally a D-shaped hole, and the fan blade is integrally formed by injection molding, but the fan blade has the following defects: firstly, a motor shaft is in 'rigid' fit with the fan blades, and no buffer exists, so that the fan blades are large in vibration and noise; secondly, the size of the injection molding part is greatly influenced by temperature and is not easy to control, and the fan blade and the motor shaft can generate virtual positions; thirdly, the rotating shaft of the fan blade is related to the quality strength, and the injection molding part is easy to age, so that the service life is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a device and fan blade of making an uproar falls for at least, solve above-mentioned a technical problem.
According to the utility model discloses a first aspect, the utility model provides a device of making an uproar falls, it is used for the fan blade to fall the device of making an uproar, a serial communication port, it includes that inner shell, cover are established to fall the device of making an uproar the outside midbody of inner shell and cover are established the outside shell of midbody, the shell be used for with the centre bore of fan blade cooperatees.
In one embodiment, the intermediate is made of rubber.
In one embodiment, the inner shell and the outer shell are both made of metal.
In one embodiment, the intermediate body is provided with a retaining portion on an outer side and/or an inner side, and the inner shell and/or the outer shell is provided with an engaging portion at a position corresponding to the retaining portion, and the retaining portion is engaged with the engaging portion.
In one embodiment, the retaining portion is a convex portion protruding in an axial direction of the intermediate body or a concave portion recessed in the axial direction of the intermediate body;
the clamping part is a concave part matched with the convex part or a convex part matched with the concave part.
In one embodiment, the first end surface of the inner shell is provided with a rotation stopping groove, and the rotation stopping groove is used for being matched with a rotation stopping gasket.
In one embodiment, at least one inner side surface of the rotation stop groove is a flat surface.
In one embodiment, the second end surface of the inner shell is provided with positioning holes.
In one embodiment, the outer peripheral wall of the housing is provided with a slot extending circumferentially therealong.
In one embodiment, both ends of the intermediate body are provided with a groove extending circumferentially thereof.
According to the utility model discloses a second aspect, the utility model provides a fan blade, it includes foretell device of making an uproar that falls, the fan blade still includes the fan blade hub, sets up blade and motor shaft on the periphery wall of fan blade hub, the shell sets up in the centre bore of fan blade hub, the motor shaft sets up in the shaft hole of inner shell.
In one embodiment, the fan blade and the noise reduction device are of an integrally formed structure.
In one embodiment, the motor shaft further comprises a rotation stopping gasket, the rotation stopping gasket is matched with the rotation stopping groove on the first end face of the inner shell, and a D-shaped hole matched with the motor shaft is further formed in the rotation stopping gasket.
In one embodiment, the fan blade is injection molded.
Compared with the prior art, the utility model has the advantages that,
(1) the intermediate body made of the non-metal elastic material is arranged between the inner shell and the outer shell, so that the effects of buffering, reducing vibration and reducing noise can be achieved, when the intermediate body is applied to the fan blade, the effect of buffering and damping can be achieved on the fan blade, the noise of the fan blade is obviously reduced, the quality of the fan blade is improved, and the satisfaction degree of customers is improved.
(2) Through the outer shell and the inner shell which are made of metal materials, the noise reduction device has good dimensional stability and long service life, and is easy to control, so that the quality of the fan blade is improved.
Drawings
The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings.
Fig. 1 and fig. 2 are schematic perspective views of a noise reduction device in an embodiment of the present invention;
fig. 3 and 4 are perspective cross-sectional views of a noise reducer in an embodiment of the present invention;
fig. 5 is a schematic perspective view of the fan blade of the present invention.
Reference numerals:
100-a noise reducing device;
1-a housing;
2-an intermediate; 21-a first boss; 22-a second boss;
3-inner shell; 31-shaft hole; 32-rotation stopping grooves; 33-positioning holes; 321-plane;
11, 34-engaging portion; 12-grooving;
200-fan blades;
41-fan hub; 42-motor shaft; 43-rotation stop washer; 44-a central aperture; 45-blade.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1-4, according to a first aspect of the present invention, the present invention provides a noise reduction device 100, particularly suitable for a fan blade 200. The utility model discloses a device of making an uproar 100 falls includes that inner shell 3, cover establish at 3 outside midbody 2 of inner shell and cover establish at the outside shell 1 of midbody. As shown in fig. 5, the casing 1 is disposed in the fan blade 200, specifically, in the central hole 44 of the fan hub 41. The inner casing 3 is provided with a shaft hole 31 axially penetrating through the inner casing 3, and the shaft hole 31 is used for matching with a motor shaft 42 of the fan blade 200, namely, the motor shaft 42 penetrates through the shaft hole 31 of the inner casing 3, so that the noise reduction device 100 is embedded in the fan blade 200.
Wherein the intermediate body 2 is made of a non-metallic elastic material. In a preferred embodiment, the intermediate body 2 is made of rubber. Because the intermediate body 2 of the noise reduction device 100 is made of rubber materials, the fit between the motor shaft 42 and the fan blade hub 41 of the fan blade 200 is not 'rigid' fit, but can be buffered through the intermediate body 2, so that the noise reduction device 100 can play the roles of buffering, reducing vibration and reducing noise in the process that the motor shaft 42 drives the fan blade hub 41 to rotate, and the technical problem of high noise of the fan blade 200 is solved.
Furthermore, because the existing fan blade is an injection molding part, the size of the fan blade is easily affected by temperature in the forming process, so that the size is uncontrollable, a virtual position may be generated between the shaft hole of the fan blade and the motor shaft, and the operation and the service life of the fan blade are not facilitated. The utility model discloses a device 100 of making an uproar falls, shaft hole 31 through its inner shell 3 cooperates with motor shaft 42, and shell 1 then cooperates with the centre bore 44 of fan blade hub 41 to cushion through midbody 2, thereby can guarantee the precision of size, and avoid the virtual position between fan blade hub 41 and the motor shaft 42.
In a preferred embodiment, both the inner shell 3 and the outer shell 1 are made of metal. Because the existing fan blade is an integral injection molding part, the quality and the strength of the matching part of the fan blade and a motor shaft are not easy to guarantee, and the plastic part is characterized by easy aging, thereby influencing the service life of the fan blade. The utility model discloses in cooperate with the centre bore 44 of fan blade hub 41 through the shell 1 that sets up metal material, because metal material's structure has good dimensional stability, and easily control, consequently when inner shell 3 cooperatees with motor shaft 42, shell 3 cooperatees with fan blade hub 41, can guarantee the intensity and the quality at each cooperation position to improve fan blade 200's life.
As shown in fig. 3 and 4, the intermediate body 2 is provided with a retaining portion on the outer side and/or the inner side, and the inner shell 3 and/or the outer shell 1 is provided with an engaging portion 11,34 at a position corresponding to the retaining portion, and the retaining portion is engaged with the engaging portion 11, 34.
Preferably, the retaining portion is a convex portion that is convex in the axial direction of the intermediate body 2. As shown in fig. 3 and 4, the retaining portions are provided on the outer side wall of the intermediate body 2 (i.e., the side close to the outer casing 1) and the inner side wall of the intermediate body 2 (i.e., the side close to the inner casing 1), respectively. The intermediate body 2 is formed to have a large middle and small ends by forming the retaining portion on the outer side wall of the intermediate body 2 as a first protrusion 21 protruding toward the outer housing 1 in the axial direction of the intermediate body 2 and forming the retaining portion on the inner side wall of the intermediate body 2 as a second protrusion 22 protruding toward the inner housing 3 in the axial direction of the intermediate body 2. Accordingly, the engaging portion 11 of the outer case 1 is a concave portion that engages with the first convex portion 21, and the engaging portion 34 of the inner case 3 is a concave portion that engages with the second convex portion 22. Namely, a part of the intermediate body 2 extends into the outer shell 1, and a part of the intermediate body extends into the inner shell 3, so that the outer shell 1, the intermediate body 2 and the inner shell 3 are tightly connected, and the phenomenon of layering and falling off is effectively avoided.
Further, the first protrusion 21 and the second protrusion 22 may be configured to be in an arc shape, a rectangular shape, a triangular shape, or a trapezoidal shape, and the present invention is not limited to the two structures, as long as the first protrusion protrudes from the outer wall or the inner wall of the middle body 2.
It is understood that the number of the first protruding portions 21 may be one or more. If a plurality of first protrusions 21 are provided, a plurality of first protrusions 22 may be provided at intervals in the axial direction of the intermediate body 2. Likewise, the number of the second protrusions 22 may be one or more. If a plurality of second protrusions 22 are provided, the plurality of second protrusions 22 may be provided at intervals in the axial direction of the intermediate body 2.
Optionally, the retaining portion is a recessed portion recessed in an axial direction of the intermediate body. In contrast to the above preferred embodiment, the retaining portion may be a recessed portion, i.e., the intermediate body 2 is formed to have a small middle portion and large ends. Accordingly, the engaging portion 11 of the outer shell 1 is a convex portion matching with the concave portion, and the engaging portion 34 of the inner shell 3 is also a convex portion matching with the concave portion, so that the three can be tightly matched with each other.
The above-mentioned depressed part and convex part can all adopt the structural style and the arrangement mode in the above-mentioned preferred embodiment, and the utility model is not repeated herein.
Further, the shaft hole 31 in the inner housing 3 is a cylindrical hole, so that a special fixing means is required between the shaft hole and the motor shaft 42 having the D-shaped structure. Specifically, a rotation stop groove 32 is provided on the first end surface of the inner case 3, and the rotation stop groove 32 is used to mate with the rotation stop washer 43. As shown in fig. 3, at least one inner side surface of the rotation stop groove 32 is a flat surface 321.
In a specific implementation, as shown in fig. 1, the rotation stopping groove 32 may be a rectangular groove, and a chamfer may be provided at the junction of the two side walls thereof to facilitate the engagement of the rotation stopping spacers 43. Thus, in the embodiment shown in fig. 1, the inner side surfaces of the rotation stopping grooves 32 are all planes 321, and each plane 321 has 8 planes 321.
In some preferred embodiments, as shown in fig. 2 and 4, the second end surface of the inner casing 3 is provided with positioning holes 33. Since it is necessary to position the inner case 3 and the outer case 1 when the intermediate body 2 is formed, and then rubber is filled between the two, the inner case 3 can be positioned by the positioning holes 33.
In some preferred embodiments, as shown in fig. 1 and 3, the outer peripheral wall of the housing 1 is provided with a cut-out 12 extending circumferentially thereof. The cutting groove 12 can be used as a positioning part of the outer shell 1, and when the outer shell 1, the intermediate body 2 and the inner shell 3 form the noise reduction device 100 and then the outer shell 1 is placed into an injection mold to integrally form the fan blade 200, the cutting groove 12 can be filled with a plastic material, so that a part of the fan blade 200 extends into the outer shell 1, the noise reduction device 100 is tightly connected with the fan blade 200, and the noise reduction device 100 is not easy to fall off.
As shown in fig. 3 and 4, both ends of the intermediate body 2 are provided with grooves extending along the circumferential direction thereof. So that both ends of the intermediate body 2 are lower than the ends of the outer shell 1 or the inner shell 3, i.e., the intermediate body 2 does not leak out of the outer shell 1 or the inner shell 3, thereby protecting the intermediate body 2 from aging by the outer shell 1 and the inner shell 3 of the metal material.
As shown in fig. 5, according to the second aspect of the present invention, the present invention provides a fan blade 200, including the above-mentioned noise reduction device 100, the fan blade 200 further includes a fan hub 41 and a motor shaft 42, the outer casing 1 is disposed in the central hole 44 of the fan hub 41, and the motor shaft 42 is disposed in the shaft hole 31 of the inner casing 3.
The fan hub 41 is made of plastic, i.e. by injection moulding; and the fan hub 41 and the noise reducer 100 are of an integrally formed structure. Specifically, when the fan blade 100 is formed, the noise reduction device 100 may be placed in an injection mold, and the fan blade 200 may be integrally formed. As described above, since the outer peripheral wall of the outer casing 1 is provided with the cutting groove 12 extending along the circumferential direction thereof, when the outer casing 1 is placed in the injection mold to integrally form the fan blade 200 after the noise reduction device 100 is formed by the outer casing 1, the intermediate body 2 and the inner casing 3, the cutting groove 12 can be filled with a plastic material, so that a part of the fan blade 200 extends into the outer casing 1, thereby ensuring the tight connection between the noise reduction device 100 and the fan blade 200, and preventing the noise reduction device 100 from easily falling off.
In addition, the fan blade 200 further includes a rotation stop washer 43, as shown in fig. 5, the rotation stop washer 43 is matched with the rotation stop groove 32 on the first end surface of the inner casing 3. According to the above embodiment, the rotation stopping groove 32 is a rectangular groove, and a chamfer is provided at the junction of two side walls, i.e. the inner side surfaces of the rotation stopping groove 32 are both flat surfaces 321. The rotation stop washer 43 may thus be provided with a rectangular configuration and also chamfered at its four corners, so that the rotation stop washer 43 may be placed in the rotation stop recess 32 for the purpose of preventing rotation thereof.
Furthermore, the rotation stopping gasket 43 is further provided with a D-shaped hole matched with the motor shaft 42, and the D-shaped structure of the motor shaft 42 can be matched with the D-shaped hole of the rotation stopping gasket 43, so that the motor shaft 42, the rotation stopping gasket 43 and the rotation stopping groove 32 can be fixed without relative movement, namely, the motor shaft 42, the noise reduction device 100 and the fan hub 41 can be fixed.
As shown in fig. 5, the fan blade 200 further includes a blade 45 disposed on the fan hub 41. Wherein, the number of the blades 45 is 3, and the 3 blades 45 are arranged at equal intervals along the circumferential direction of the wind blade hub 41.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (14)
1. A noise reduction device is used for a fan blade and is characterized by comprising an inner shell, an intermediate body and an outer shell, wherein the intermediate body is sleeved outside the inner shell, the outer shell is sleeved outside the intermediate body, and the outer shell is used for being matched with a central hole of the fan blade;
wherein, be provided with in the inner shell and run through the shaft hole of inner shell in the axial, the midbody is made by non-metallic elastic material.
2. The noise reduction device of claim 1, wherein the intermediate body is made of rubber.
3. The noise reduction device of claim 1 or 2, wherein the inner shell and the outer shell are both made of metal.
4. The noise reduction device according to claim 1 or 2, wherein a retaining portion is provided on an outer side and/or an inner side of the intermediate body, and an engaging portion is provided on the inner shell and/or the outer shell at a position corresponding to the retaining portion, and the retaining portion is engaged with the engaging portion.
5. The noise reduction device according to claim 4, wherein the retaining portion is a convex portion that is convex in the axial direction of the intermediate body or a concave portion that is concave in the axial direction of the intermediate body;
the clamping part is a concave part matched with the convex part or a convex part matched with the concave part.
6. The noise reducer according to claim 1 or 2, wherein the first end surface of the inner shell is provided with a rotation stop groove for cooperating with a rotation stop washer.
7. The noise reducer of claim 6, wherein at least one inner side surface of the anti-rotation groove is flat.
8. The noise reducer according to claim 1 or 2, wherein the second end surface of the inner shell is provided with positioning holes.
9. The noise reducer according to claim 8, wherein the outer peripheral wall of the housing is provided with a cut groove extending circumferentially thereof.
10. The noise reducer according to claim 9, wherein both ends of the intermediate body are provided with grooves extending circumferentially thereof.
11. A fan blade comprising the noise reduction device as set forth in any one of claims 1 to 10, further comprising a fan hub, a fan blade disposed on an outer peripheral wall of the fan hub, and a motor shaft, wherein the outer casing is disposed in a center hole of the fan hub, and the motor shaft is disposed in a shaft hole of the inner casing.
12. The fan blade of claim 11, wherein the fan blade and the noise reducer are of an integrally formed structure.
13. The fan blade according to claim 11 or 12, further comprising a rotation stopping gasket, wherein the rotation stopping gasket is matched with a rotation stopping groove on the first end surface of the inner shell, and a D-shaped hole matched with the motor shaft is further formed in the rotation stopping gasket.
14. The blade of claim 11 or 12, wherein the blade is injection molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120019931.1U CN214468993U (en) | 2021-01-05 | 2021-01-05 | Noise reduction device and fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120019931.1U CN214468993U (en) | 2021-01-05 | 2021-01-05 | Noise reduction device and fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214468993U true CN214468993U (en) | 2021-10-22 |
Family
ID=78111664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120019931.1U Active CN214468993U (en) | 2021-01-05 | 2021-01-05 | Noise reduction device and fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214468993U (en) |
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2021
- 2021-01-05 CN CN202120019931.1U patent/CN214468993U/en active Active
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