CN213959892U - Annular elastic vibration damping pad for fan and household appliance - Google Patents

Abstract

The application provides an annular elasticity damping pad and domestic appliance for fan annular elasticity damping pad goes up and distributes along the circumferential direction has a plurality of damping holes, the damping hole extends along axial direction and runs through annular elasticity damping pad, annular elasticity damping pad construct with the casing of fan is elastic contact circumferentially. By utilizing the annular elastic vibration damping pad, vibration waves from the motor can be effectively absorbed, the propagation of vibration is blocked, and the noise is reduced.

Description

Annular elastic vibration damping pad for fan and household appliance

Technical Field

The present invention relates to the field of power components, and more particularly, to an annular elastic vibration damping pad for a fan and a household appliance.

Background

The motor inevitably produces vibration and noise in the working process, and the vibration and the noise are more serious along with the increase of the power and the increase of the rotating speed of the motor. Especially, a motor applied to a home appliance, such as a vacuum cleaner motor, generates vibration and noise during operation, so that the user experience is very poor. Such motors are generally mounted inside the housing of the household appliance using a vibration damping pad. The damping pad used in the current market is only simple in cylindrical wrapping motor or sheet-shaped fixed at the front end and the rear end of the motor. As a transitional vibration reduction device, the vibration of the motor cannot be well absorbed, a large amount of vibration waves are continuously transmitted outwards, and the user experience is very poor.

SUMMERY OF THE UTILITY MODEL

To the problem among the above-mentioned prior art, this application has provided an annular elasticity damping pad and domestic appliance for fan, through set up a plurality of damping holes of evenly distributed on the body at annular damping pad, can the effective absorption vibration wave, the propagation of separation vibration has reduced the noise.

In a first aspect, the present application provides an annular elastic damping pad for a fan, the annular elastic damping pad having a plurality of damping holes distributed along a circumferential direction thereon, the damping holes extending through the annular elastic damping pad along an axial direction, the annular elastic damping pad being configured to be in circumferential elastic contact with a casing of the fan. By utilizing the annular elastic vibration damping pad, vibration waves generated by the working of the fan can be effectively absorbed, the propagation of vibration is obstructed, and the noise is reduced.

In one possible embodiment of the first aspect, a plurality of damping holes are distributed in a circumferential direction on the annular elastic damping pad in the form of damping hole groups, each damping hole group comprising a plurality of first damping holes and at least one second damping hole enclosed in a construction circle constituted by the centers of the plurality of first damping holes. With this embodiment, the vibration damping hole group can increase the distribution of the vibration damping holes in the thickness direction of the vibration damping pad body, and increase the efficiency of absorbing vibration waves.

In one possible embodiment of the first aspect, the diameter of the second damping hole is smaller than or equal to the diameter of the first damping hole.

In one possible embodiment of the first aspect, the damping hole group includes 3 first damping holes and 1 second damping hole.

In one possible embodiment of the first aspect, any two adjacent damping hole groups are centrosymmetric.

In one possible embodiment of the first aspect, a plurality of inner projection structures are uniformly provided on an inner wall of the annular elastic vibration damping pad in a circumferential direction, the inner projection structures extending in an axial direction, the plurality of inner projection structures being configured to elastically engage with the fan to fix the fan. Through this embodiment, protruding structure can reduce the area of contact of damping pad and fan casing relatively, reduces the propagation of vibration wave, can make simultaneously to produce the clearance between protruding mechanism and the fan casing in the protruding mechanism, and this clearance can make between the vibration wave of dispersing offset each other, and the clearance can increase the heat dissipation route simultaneously.

In a possible embodiment of the first aspect, the outer wall of the annular elastic damping pad is provided uniformly along the circumferential direction with a plurality of outer protruding structures extending along the axial direction for elastically engaging other components of the household appliance. By this embodiment, on the one hand, the fan is spaced from external parts, and on the other hand, the outer convex structure can also form a gap, absorb vibration waves and increase a heat dissipation path.

In a possible embodiment of the first aspect, the number of inner protrusion structures is equal to the number of damping hole groups, and/or the number of outer protrusion structures is larger than the number of inner protrusion structures. Through this embodiment for when the vibration that the fan during operation produced outwards propagates, can effectively weaken the fan vibration to the outer protruding structure dispersion more than 1 by an interior protruding structure.

In a second aspect, the present application also provides a domestic appliance having a fan mounted therein and the resilient annular vibration damping pad of any one of the first aspect and its possible embodiments, which resiliently secures the housing of the fan.

In one possible embodiment of the second aspect, the household appliance is a vacuum cleaner or a sweeping robot.

The application provides an annular elastic damping pad and domestic appliance, compare in prior art, through the protruding structure that sets up a plurality of evenly distributed at inner wall and outer wall to a plurality of damping punch combination of evenly distributed on the body can absorb the vibration wave that the fan produced when moving effectively, and the propagation of separation vibration wave has reduced the noise, and the clearance between this protruding structure and fan casing or other spare parts surfaces can play certain radiating effect.

The above-mentioned technical characteristics can be combined in various suitable ways or replaced by equivalent technical characteristics as long as the purpose of the invention can be achieved.

Drawings

The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings, in which:

FIG. 1 shows a perspective view of an annular elastomeric vibration damping pad in accordance with an embodiment of the present invention;

FIG. 2 shows a front view of an annular elastomeric vibration damping pad according to an embodiment of the present invention;

FIG. 3 shows an enlarged partial view of an annular elastomeric vibration damping pad in area A in accordance with an embodiment of the present invention;

FIG. 4 illustrates a top view of an annular elastomeric damping pad and fan assembly in accordance with an embodiment of the present invention;

fig. 5 shows a partial enlarged view of the area B in fig. 4 of an assembly of an annular elastic damping pad and a fan according to an embodiment of the present invention.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

List of reference numerals:

100-ring-shaped elastic damping pad; 110-inner convex structure; 120-an outer convex structure; 130-a damping pad body; 140-damping hole group; 141-a first damping aperture; 142-a second damping hole; 200-a fan; 300-gap.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Fig. 1 and 2 are schematic structural views of an annular elastic damping pad 100 provided in the present application. As shown in fig. 1 and 2, the annular elastic vibration damping pad 100 has a circular ring shape, and a plurality of inner protrusion structures 110 are provided on an inner wall thereof in a circumferential direction, the inner protrusion structures 110 extending in an axial direction. When the fan 200 is installed inside the vibration damping pad, the inner protrusion 110 elastically abuts against the fan housing to be elastically deformed, and applies elastic pressure in a radial direction to the fan housing, thereby fixing the fan 200 therein.

The annular elastic damping pad 100 may be made of an elastic material (e.g., rubber) and may be capable of stretching under an external force to accommodate different sized fans 200. In order to securely mount the blower 200 in the vibration damping pad, the inner diameter of the inner circle defined by the vertexes of the plurality of inner convex structures 110 of the annular elastic vibration damping pad 100 in the relaxed state should be smaller than the diameter of the blower housing, and the maximum inner diameter of the inner circle defined by the vertexes of the plurality of inner convex structures 110 in the maximum tensile state of the annular elastic vibration damping pad 100 should be greater than or equal to the diameter of the blower housing, and the specific value of the maximum inner diameter may be determined according to the size and the working condition of the blower.

Through above-mentioned structure, area of contact between interior protruding structure and the fan casing for prior art's cylinder formula parcel class damping pad, area of contact reduces, has reduced the propagation of motor vibration.

In a preferred embodiment, the surface of the inner protruding structure 110 is smooth arc-shaped (more preferably circular arc-shaped), and all the inner protruding structures 110 have the same curvature and have the same radial height, so that the inner protruding structure 110 and the fan casing have a relatively large contact area in an elastic compression state, and the fan 200 can be prevented from falling off due to vibration during movement, thereby enhancing the reliability of fixing the fan.

Alternatively, the inner protrusion 110 may extend over all or part of its length on the inner wall of the damping pad, i.e. its axial length may be equal to or less than the axial height of the inner wall (fig. 1). It will be appreciated that in either case, the ends of the plurality of inner protrusion structures 110 should lie in the same plane to ensure that an evenly distributed force is generated in the circumferential direction when the wind blows against them.

In a more preferred embodiment, the plurality of inner projection structures 110 are distributed closely adjacent in the circumferential direction, i.e. there are no gaps between adjacent inner projection structures 110. In this way, as shown in fig. 5, a gap 300 similar to a triangle is formed between the arc surfaces of the adjacent inner protruding structures and the surface of the fan casing, so that when vibration generated by the operation of the motor is transmitted outwards through the inner protruding structures 110, at the junction of any two inner protruding structures 110, the divergent vibration waves will cancel each other (as shown by dotted arrows), and the transmission of the vibration waves is greatly reduced; for the damping pad of cylinder parcel fan, there is a large amount of clearances 300 between motor damping pad and the motor casing surface, is favorable to the heat dissipation of motor.

In another embodiment, a plurality of outer raised structures 120 are also provided in the circumferential direction on the outer wall of the annular elastomeric damping pad 100, the outer raised structures 120 extending in the axial direction. When the annular elastic vibration damping pad 100 is applied to a home appliance, the outer protrusion structure 120 elastically abuts against other components in the appliance, thereby isolating the blower 100 from other components in the appliance.

Similarly, the surface of the outer protrusion structure 120 is smoothly curved (more preferably, circular arc-shaped), and all of the outer protrusion structures 110 have the same curvature and the same radial height, so that the outer protrusion structure 120 and other components have a relatively large contact area in an elastically compressed state, so that the annular elastic vibration damping pad 100 can be stably disposed between the fan and other components.

Alternatively, on the outer wall of the pad, the outer protrusion 120 may extend over all or part of its length, i.e., its axial length may be equal to or less than the axial height of the outer wall (fig. 1). It should be understood that in either case, the ends of the plurality of outer projection structures 120 should lie in the same plane.

In a more preferred embodiment, the plurality of outer raised structures 120 are distributed immediately adjacent in the circumferential direction, i.e., there are no gaps between adjacent outer raised structures 120. The number of the outer convex structures 120 is greater than that of the inner convex structures 110, so that when vibration generated by the operation of the fan 200 is transmitted outwards, the vibration can be dispersed from one inner convex structure 110 to at least one outer convex structure 120, and the vibration of the fan is effectively weakened.

In a preferred embodiment, the inner and outer protrusions 110 and 120 are integrally formed with the damping pad body 130, such as by injection molding, which facilitates the manufacturing process, and the integral structure prevents the occurrence of additional noise problems caused by the mechanical connection of multiple parts.

As shown in fig. 1 and 2, at least one damping hole is uniformly distributed on the damping pad body 130 of the annular elastic damping pad 100 along the circumferential direction, the damping hole extends along the axial direction to form damping hole columns, and the damping hole columns can further absorb the vibration waves transmitted by the fan and reduce the generation of noise.

Alternatively, the damping holes may have a variety of different shapes, such as circular, semi-circular, oval, square or diamond shapes, etc., for ease of machining.

In a particular embodiment, there are a plurality of damping hole groups 140 on the damping pad body 130, and these damping hole groups 140 are also evenly distributed in the circumferential direction of the body, so that the vibration waves are absorbed more effectively, and the generation of noise is attenuated. As shown in fig. 2 and 3, each of the damper hole groups 140 has a plurality of damper holes, which form the damper hole groups 140 in a certain combination relationship.

In the preferred embodiment of fig. 3, the damping hole group 140 includes a plurality of first damping holes 141 and at least one second damping hole 142, the plurality of first damping holes 141 surrounding the second damping hole 142 therein. In this way, the distribution of the damping holes in the thickness direction of the damping pad body 130 can be increased, and the efficiency of absorbing the vibration waves can be increased.

In one embodiment, as shown in fig. 3, only 1 second damping hole 142 is provided in each damping hole group 140, and the center of the second damping hole 142 is located at the center of a construction circle formed by the centers of the plurality of first damping holes 141, that is, at the center of a first geometric polygon formed by connecting the centers of the plurality of first damping holes 141, so as to uniformly absorb residual vibration waves from each direction and block the propagation of vibration generated when the motor operates; meanwhile, in the plurality of damping hole groups 140, the center of each second damping hole 142 is positioned such that a circle formed by the centers of the plurality of second damping holes 142 should be coaxial with the rotation shaft of the inner fan rotor assembly to maintain the stability of the fan during operation.

In another embodiment, a plurality of second damping holes 142 are provided in each damping hole group 140, and the plurality of second damping holes 142 are enclosed inside a construction circle formed by the centers of the plurality of first damping holes 141, (the centers of the plurality of second damping holes 142 are connected to form the center of a second geometric polygon), preferably, the center of the first geometric polygon formed by the connection of the centers of the plurality of first damping holes 141, so as to uniformly absorb the residual wave of vibration from each reverse direction and block the propagation of vibration generated when the motor operates; meanwhile, in the plurality of damping hole groups 140, a circle formed by the plurality of second damping holes 142 of each damping hole group 140 is positioned coaxially with the rotation shaft of the inner fan rotor assembly, that is, a configuration circle formed by the centers of the plurality of first damping holes 141, a configuration circle formed by the circles of the plurality of second damping holes 142, and the fan rotation shaft, so as to maintain the stability of the fan in operation.

Here, the first geometric polygon or the second geometric polygon may be formed as a regular triangle, a square, a regular pentagon, a regular hexagon, or the like, more preferably. More preferably, as shown in fig. 3, the damping hole group 140 includes 3 first damping holes 141 and 1 second damping hole 142, the second damping hole 142 is enclosed inside a construction circle formed by the centers of the 3 first damping holes 141, and the center of the second damping hole 142 is located at the center of the construction circle. The second damping holes 142 can uniformly absorb the vibration residual wave from the 3 first damping holes 141 adjacent thereto, and the damping pad having the plurality of damping hole groups 140 has characteristics of stability and pressure resistance according to the triangular stabilization principle.

As described above, the plurality of damping hole groups 140 are distributed on the body 130 of the damping pad according to a certain rule and number, the number being selected on the premise of ensuring the structural strength of the annular elastic damping pad 100, and the relative positional relationship of the adjacent damping hole groups 140 may be set according to actual needs. Preferably, the number of damping hole groups 140 may be the same as the number of inner protrusion structures 110, and each damping hole group 140 is centrosymmetric to the adjacent damping hole group 140.

Alternatively, the diameter of the second damping hole 142 may be smaller than or equal to the diameter of the first damping hole 141; preferably, the diameter of the second damping hole 142 may be smaller than that of the first damping hole 141, as shown in fig. 3 and 4.

The annular elastic vibration damping pad 100 provided by the present application can be applied to various types of household appliances, such as a vacuum cleaner or a sweeping robot, together with the blower fan 200.

The utility model provides an annular elastic damping pad through the protruding structure that sets up a plurality of evenly distributed at inner wall and outer wall to a plurality of damping punch combination of evenly distributed on the body can absorb the vibration wave that the fan produced when the operation effectively, and the propagation of separation vibration wave has reduced the noise, and the clearance between this protruding structure and fan casing or other spare parts surfaces can play certain radiating action.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

Claims (10)

1. An annular elastic vibration damping pad for a fan, characterized in that a plurality of vibration damping holes are distributed along a circumferential direction on the annular elastic vibration damping pad, the vibration damping holes extend along an axial direction to penetrate through the annular elastic vibration damping pad, and the annular elastic vibration damping pad is configured to be in circumferential elastic contact with a casing of the fan.

2. An annular elastic damping pad according to claim 1, characterized in that a plurality of damping holes are distributed in circumferential direction on the annular elastic damping pad in the form of damping hole groups, each damping hole group comprising a plurality of first damping holes and at least one second damping hole enclosed in a construction circle constituted by the centers of the plurality of first damping holes.

3. The annular elastomeric damping pad of claim 2, wherein a diameter of said second damping hole is less than or equal to a diameter of said first damping hole.

4. An annular elastomeric damping pad according to claim 3, wherein said damping hole set comprises 3 of said first damping holes and 1 of said second damping holes.

5. An annular elastic damping pad according to any of claims 2 to 4, characterized in that any two adjacent damping hole groups are centrosymmetric.

6. The annular elastomeric damping pad according to any one of claims 2 to 4, wherein a plurality of inner raised structures are provided uniformly along a circumferential direction on an inner wall of the annular elastomeric damping pad, the inner raised structures extending along an axial direction, the plurality of inner raised structures being configured to resiliently engage with the fan to secure the fan.

7. An annular elastic vibration damping pad according to claim 6, characterized in that a plurality of outer protruding structures are uniformly provided on the outer wall of the annular elastic vibration damping pad along the circumferential direction, said outer protruding structures extending along the axial direction for elastically engaging other components of the household appliance.

8. An annular elastic damping pad according to claim 7, characterized in that the number of inner protruding structures is equal to the number of damping hole groups and/or the number of outer protruding structures is larger than the number of inner protruding structures.

9. An electric household appliance, characterized in that it internally houses a fan and an annular elastic damping pad according to any one of claims 1 to 8, which elastically fixes the casing of the fan.

10. The household appliance according to claim 9, wherein the household appliance is a vacuum cleaner or a sweeping robot.

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