CN119508283A - Vibration absorption structure and fan and range hood including the same - Google Patents

Abstract

The invention discloses a vibration absorbing structure, a fan and a range hood comprising the same, wherein the vibration absorbing structure is arranged on a motor body so as to absorb vibration generated by the motor, the vibration absorbing structure comprises a plurality of vibration absorbing units which are arranged at intervals along the circumferential surface of the motor body, each vibration absorbing unit comprises an elastic piece and a balancing weight, the elastic piece is attached to the surface of the motor body, the balancing weight is connected to the tail end of the elastic piece along the axial direction of the motor body, the first ratio of at least two vibration absorbing units is different, and the first ratio is the ratio of the length of the elastic piece to the mass of the balancing weight. This structure of absorbing vibration and fan, lampblack absorber including it are through above-mentioned structure of absorbing vibration, have reduced motor body's vibration from the source, have effectively reduced the noise and have effectively reduced the peak value of multiple frequency vibration with the mode that elasticity absorbed vibration, have avoided unusual noise, have improved sound experience effect.

Description

Shock absorbing structure and fan and range hood comprising same

Technical Field

The invention relates to the technical field of household appliances, in particular to a vibration absorbing structure, a fan comprising the same and a range hood.

Background

The fan of the range hood can generate stronger vibration noise under certain working conditions, in particular to the abnormal sound problems of 24 times frequency and 30 times frequency. Reducing the transmission of fan body vibrations to the mounting housing is one way to address such vibration noise. The traditional scheme is to add the vibration isolator between fan body and installation casing, and general vibration isolator adopts the rubber material, designs different shapes or hardness.

However, the conventional vibration isolator only isolates vibration and cannot directly reduce the vibration of the motor body, and due to the complexity of a transmission path, some vibration is transmitted to the rear end of the fan through the vibration isolator, the vibration is amplified, the conventional vibration isolator scheme cannot achieve a good abnormal sound improving effect, the vibration isolator is limited in frequency or order of abnormal sound, and the effect on a plurality of discrete vibration peak points is poor.

Disclosure of Invention

The invention aims to overcome the defect of poor effect of reducing fan vibration in the prior art, and provides a vibration absorbing structure, a fan comprising the same and a range hood.

The invention solves the technical problems by the following technical scheme:

The vibration absorbing structure is arranged on a motor body to absorb vibration generated by the motor and comprises a plurality of vibration absorbing units which are arranged along the circumferential surface of the motor body at intervals, each vibration absorbing unit comprises an elastic piece and a balancing weight, the elastic pieces are attached to the surface of the motor body, the balancing weights are connected to the elastic pieces at the tail ends of the elastic pieces along the axial direction of the motor body, and at least two vibration absorbing units are different in first ratio, wherein the first ratio is the ratio of the length of the elastic pieces to the mass of the balancing weights.

In this scheme, this structure of absorbing vibration is through attaching the elastic component on the surface of motor body, and the balancing weight is connected in the end of elastic component, can directly absorb the vibration that the motor produced, has reduced motor body's vibration from the source, has effectively reduced the noise. At least two vibration absorbing units adopt different first ratios, so that the vibration absorbing structure can absorb at least two discrete vibrations with different frequencies, and effectively reduce the peak value of multiple frequency vibration in an elastic vibration absorbing mode, avoid abnormal noise and improve the sound experience effect. The ratio of the length of the elastic piece to the mass of the balancing weight determines the vibration frequency, so that the vibration of different frequencies can be absorbed by adjusting the length of the elastic piece and/or the mass of the balancing weight, and the absorption effect of the vibration of a plurality of discrete frequencies is improved.

Preferably, the vibration absorbing unit is an elastic winding strip, the elastic piece is a flattening section of the winding strip, the balancing weight is a winding section which extends along the axial direction of the motor body and is wound into a plurality of circles, and the first ratio of at least two winding strips is different.

In this scheme, the unit that absorbs vibration adopts elasticity to roll up the strip, not only has elasticity effect, can also adjust the length of flattening section and the quality of crimping section in a flexible way according to the needs of absorbing different frequency vibrations. The length of the flattening section can be adjusted by increasing or reducing the number of turns of the winding section and also can be adjusted by reducing or prolonging the whole length of the winding strip, and the quality of the winding section can be adjusted by increasing or reducing the number of turns of the winding section, so that the flexibility of adjustment is better and the adaptability is stronger.

Preferably, the plurality of winding strips are divided into at least two groups of winding strips, the first ratios of the winding strips of different groups are different, and the lengths of the flattening sections of all the winding strips in the same group are the same.

In this scheme, through divide into two at least groups of reel strips of different first ratios with a plurality of reel strip for this structure of absorbing vibration can absorb the vibration of two at least different frequencies. All the winding strips in the same group adopt flattening sections with the same length, so that all the winding strips of the vibration absorbing structure are regular in shape and convenient to process and manufacture.

Preferably, different sets of said strips are arranged alternately.

In this scheme, the strip of rolling up of different groups sets up in turn, arranges the rule for the strip of rolling up of same group is arranged according to the rule order at circumference surface, is favorable to absorbing vibration, noise reduction's effect.

Preferably, the lengths of the flattened sections are different from one group of the strips to the other, and the quality of the curled sections is the same.

In the scheme, the first ratio of the winding strips of different groups is different by adopting the mode that the quality of the winding sections is the same and the lengths of the flattening sections are different.

Preferably, the thickness, width and number of turns of the winding section are the same for all the winding strips.

In the scheme, the winding strips are regular in shape and easy to process, and meanwhile, three factors (thickness, width and winding turns) are the same, so that the quality of the winding sections of different groups of winding strips is guaranteed to be the same.

Preferably, the total length, width and thickness of all the winding strips are the same, the winding numbers of the winding sections of different winding strips are different, and the total length of the winding strips is the sum of the length of the flattening section and the winding length of the winding sections.

In this scheme, adopt above-mentioned setting, the shape rule of reel strip is convenient for make. By distributing the ratio between the length of the flattened section and the wound length of the curled section over the same total length of the winding, a different first ratio can be obtained, so that the winding can be adapted to different frequencies.

The fan comprises a motor and the vibration absorbing structure, wherein the vibration absorbing structure is attached to the surface of the motor body of the motor.

In this scheme, this fan has reduced motor body's vibration from the source through above-mentioned structure of absorbing vibration, has effectively reduced the noise and has effectively reduced the peak value of multiple frequency vibration with the mode of elasticity absorbing vibration, has avoided abnormal noise, has improved sound experience effect.

Preferably, the fan further comprises a fan shell, and the motor is mounted on the fan shell through a vibration isolation pad.

In this scheme, this fan is through the vibration isolator of above-mentioned setting, avoids transmitting the vibration of fan to the fan casing on, has further improved the shock attenuation of fan and has fallen the noise reduction effect.

A range hood, which comprises a main body, the range hood comprises the fan.

In this scheme, this lampblack absorber has reduced the vibration of motor body from the source through above-mentioned fan, has effectively reduced the noise and has effectively reduced the peak value of multiple frequency vibration with the mode of elasticity vibration absorption, has avoided abnormal noise, has improved sound experience effect.

The vibration absorbing structure and the fan and the range hood comprising the same have the advantages that through the vibration absorbing structure, the vibration of the motor body is reduced from the source, the noise is effectively reduced in an elastic vibration absorbing mode, the peak value of multiple frequency vibration is effectively reduced, abnormal noise is avoided, and the sound experience effect is improved.

Drawings

Fig. 1 is a schematic structural diagram of a shock absorbing structure according to embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of a shock absorbing unit according to embodiment 1 of the present invention.

Fig. 3 is a schematic structural diagram of a fan according to embodiment 1 of the present invention.

Fig. 4 is a schematic structural diagram of a range hood according to embodiment 1 of the present invention.

Reference numerals illustrate:

shock absorbing structure 1

Shock absorbing unit 2

Elastic member 3

Counterweight 4

Steel ring 5

Roll strip 6

First group of winding bars 61

Second group of strips 62

Flattening section 7

Coiling section 8

Axial direction A of motor body

Blower 9

Motor body 10

Blower housing 11

Vibration isolator 12

Kitchen ventilator 13

Detailed Description

The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention.

Example 1

The present embodiment provides a vibration absorbing structure 1 mounted on a motor body 10 to absorb vibrations generated by a motor. The motor is applied to a fan 9 of a range hood 13, and is particularly arranged in a fan shell 11. The motor drives an impeller (not shown) of the fan 9 to rotate, and smoke of the range hood 13 is sucked and discharged.

As shown in fig. 1-2, the vibration absorbing structure 1 comprises a plurality of vibration absorbing units 2 arranged at intervals along the circumferential surface of a motor body 10, each vibration absorbing unit 2 comprises an elastic piece 3 and a balancing weight 4, the elastic piece 3 is attached to the surface of the motor body 10, the balancing weight 4 is connected to the tail end of the elastic piece 3 along the axial direction of the motor body 10, and the first ratio of at least two vibration absorbing units 2 is different and is the ratio of the length of the elastic piece 3 to the mass of the balancing weight 4.

Specifically, in the present embodiment, the vibration absorbing unit 2 is an elastic coil strip 6, and is a coil strip 6 made of an elastic steel strip. The vibration absorbing structure 1 comprises a steel ring 5 and a plurality of winding strips 6 connected to the steel ring 5, wherein the winding strips 6 are arranged at intervals along the circumferential surface of a motor body 10, an elastic piece 3 is a flattening section 7 of the winding strips 6, and a balancing weight 4 is a curling section 8 which extends along the axial direction of the motor body 10 and is wound into a plurality of circles. On the circumferential surface of the motor body 10, there are at least two winding bars 6 having different first ratios.

This structure 1 absorbs vibrations that vibration through attaching elastic component 3 on the surface of motor body 10, balancing weight 4 are connected in the end of elastic component 3, can directly absorb the motor and produce, have reduced motor body 10's vibration from the source, have effectively reduced the noise. At least two vibration absorbing units 2 adopt different first ratios, so that the vibration absorbing structure 1 can absorb at least two discrete vibrations with different frequencies, and effectively reduce the peak value of multiple frequency vibration in an elastic vibration absorbing mode, avoid abnormal noise and improve the sound experience effect. Wherein, according to the calculation formula of the vibration frequencyThe calculation formula of the vibration frequency is that in the prior art, k is the length of the elastic piece 3, and m is the mass of the balancing weight 4, so that the ratio of the length of the elastic piece 3 to the mass of the balancing weight 4 determines the vibration frequency, and therefore, the vibration of different frequencies can be absorbed by adjusting the length of the elastic piece 3 and/or the mass of the balancing weight 4, and the absorption effect of a plurality of discrete frequency vibrations is improved.

In other embodiments, the elastic member 3 may also use other elastic components, and the weight 4 may also use other components with different sizes or variable masses, for example, the weight 4 may be an elastic ball with different sizes that is hung at the end of the elastic member 3. However, unlike the vibration absorbing unit 2 of the present embodiment, the elastic winding strip 6 has not only an elastic effect, but also flexible adjustment of the length of the flattening section 7 and the mass of the winding section 8 according to the need of absorbing vibrations of different frequencies. The length of the flattening section 7 can be adjusted by increasing or reducing the number of turns of the winding section 8 and also can be adjusted by reducing or prolonging the whole length of the winding strip 6, and the quality of the winding section 8 can be adjusted by increasing or reducing the number of turns of the winding section 8, so that the flexibility of adjustment is better and the adaptability is stronger.

The plurality of winding strips 6 are divided into at least two groups of winding strips 6, the first ratio values of the winding strips 6 in different groups are different, and the lengths of the flattening sections 7 of all the winding strips 6 in the same group are the same. Specifically, in this embodiment, the plurality of winding bars 6 of one turn are divided into two groups with unequal lengths of the flattening sections 7, namely, a first group of winding bars 61 and a second group of winding bars 62, wherein in the first group of winding bars 61, the flattening sections 7 of the plurality of winding bars 6 have the same length but are shorter, the number of windings of the curling section 8 is more, and the quality is large, and in the second group of winding bars 62, the flattening sections 7 of the plurality of winding bars 6 have the same length but are longer, the number of windings of the curling section 8 is less, and the quality is smaller, so that the two groups obtain different first ratios. In other embodiments, all the strips 6 may be divided into more groups to absorb 3 or more different vibration frequencies, as required by the vibration absorbing frequency.

The vibration absorbing structure 1 enables the vibration absorbing structure 1 to absorb vibrations of at least two different frequencies by dividing a number of winding strips 6 into at least two sets of winding strips 6 of different first ratios. All the winding strips 6 in the same group adopt flattening sections 7 with the same length, so that all the winding strips 6 of the shock absorbing structure 1 are regular in shape and convenient to process and manufacture.

Wherein the different sets of strips 6 are arranged alternately, i.e. the first set of strips 61 and the second set of strips 62 are arranged alternately. The winding strips 6 of different groups are alternately arranged and regularly arranged, so that the winding strips 6 of the same group are orderly arranged on the circumferential surface, and the effects of absorbing vibration and reducing noise are facilitated. In other embodiments, the winding strips 6 of different groups may not be alternately arranged according to the requirement of the vibration absorbing effect, for example, a plurality of winding strips 6 of the first group or the second group may be continuously arranged locally according to the specific position of the vibration source of the motor in the circumferential direction.

The first ratios of the plurality of groups of winding strips 6 may be different, for example, lengths of the flattening sections 7 are different, and masses of the winding sections 8 are the same among the winding strips 6 of different groups, or in other embodiments, the flattening sections 7 of all winding strips 6 in the circumferential direction are the same, and masses of the winding sections 8 are different, in which case, ratios between lengths of the flattening sections 7 and masses of the winding sections 8 are also different among the winding strips 6 of different groups, so that the vibration absorbing structure 1 can absorb vibrations with different frequencies.

In other embodiments, the thickness, width and number of turns of the rolled sections 8 may be designed to be the same for all rolled strips 6 in order to obtain the same quality for different sets of rolled sections 8, so that the rolled strips 6 are regular in shape and easy to process. The three factors (thickness, width and number of windings) are the same, ensuring that the quality of the curled segments 8 of the different sets of strips 6 are all the same. Since the lengths of the flattened sections 7 of the two sets of strips 6 are different in this embodiment, different first ratios can be achieved if the curled sections 8 of the two sets of strips 6 are of the same mass.

Since the quality of the crimp segment 8 is related to both the width, thickness and number of windings of the crimp band 6, in other embodiments the desired quality of the crimp segment 8 can be obtained by adjusting the width, thickness and number of windings of the crimp band 6.

In this embodiment, the total length, width and thickness of all the winding strips 6 are the same, the number of windings of the winding sections 8 of the two winding strips 6 are different, i.e. the first winding strip 61 has a shorter length of the flattening section 7, the winding sections 8 have a larger number of windings, the second winding strip 62 has a longer length of the flattening section 7, the winding sections 8 have a smaller number of windings, but the total lengths of the two winding strips 6 are the same, and the total length is the sum of the length of the flattening section 7 and the winding length of the winding section 8. In this way, the rolled strip 6 is regular in shape and easy to manufacture. By distributing the ratio between the length of the flattened section 7 and the wound length of the curled section 8 over the same total length of the winding bar 6, different first ratios can be obtained, so that the winding bar 6 can be adapted to different frequencies.

When the vibration absorbing structure 1 of the present embodiment is applied, the natural frequency of vibration absorption is generally determined by the peak frequency of the vibration spectrum in a certain gear working state of the range hood 13, and the proper length k of the elastic member 3 and the mass m of the counterweight 4 are selected in turn according to the natural frequency f and the above formula. After determining the width, thickness and material of the winding strip 6, the length of the winding strip 6 can be designed according to the vibration absorption frequency, the winding strip is wound into a mass block m, and the length k of the flattening section 7 is determined by the remaining length.

Example 2

The present embodiment provides a blower 9, as shown in fig. 3, the blower 9 includes a motor and a vibration absorbing structure 1 as in embodiment 1, the vibration absorbing structure 1 being attached to a surface of a motor body 10 of the motor. This fan 9 has reduced the vibration of motor body 10 from the source through above-mentioned structure 1 that shakes that absorbs, has effectively reduced the noise and has effectively reduced the peak value of multiple frequency vibration with the mode of elasticity vibration absorption, has avoided unusual noise, has improved sound experience effect.

As shown in fig. 3, the fan 9 further includes a fan housing 11, and the motor is mounted on the fan housing 11 through a vibration isolator 12. The vibration isolator 12 that this fan 9 set up through above-mentioned avoids transmitting the vibration of fan 9 to fan casing 11 on, has further improved the shock attenuation of fan 9 and has fallen the noise reduction effect.

Example 3

As shown in fig. 4, the present embodiment provides a range hood 13, and the range hood 13 includes a blower 9 as in embodiment 2. This lampblack absorber 13 has reduced the vibration of motor body 10 from the source through above-mentioned fan 9, has effectively reduced the noise and has effectively reduced the peak value of multiple frequency vibration with the mode of elasticity vibration absorption, has avoided unusual noise, has improved sound experience effect.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.

Claims (10)

1. The vibration absorbing structure is arranged on the motor body to absorb vibration generated by the motor and is characterized by comprising a plurality of vibration absorbing units which are arranged at intervals along the circumferential surface of the motor body, wherein each vibration absorbing unit comprises an elastic piece and a balancing weight, the elastic piece is attached to the surface of the motor body, and the balancing weight is connected to the tail end of the elastic piece along the axial direction of the motor body;

the first ratio of the at least two vibration absorbing units is different, and the first ratio is the ratio of the length of the elastic piece to the mass of the balancing weight.

2. The vibration absorbing structure according to claim 1, wherein the vibration absorbing unit is an elastic winding bar, the elastic member is a flattened section of the winding bar, the balancing weight is a winding section of the flattened section extending along an axial direction of the motor body and wound into a plurality of turns, and the first ratio of at least two winding bars is different.

3. The shock absorbing structure of claim 2, wherein a plurality of said strips are divided into at least two sets of strips, said first ratios of said strips of different sets being different, and wherein said flattened sections of all said strips within the same set are the same length.

4. A shock absorbing structure as claimed in claim 3, wherein different sets of said strips are arranged alternately.

5. A shock absorbing structure as defined in claim 3, wherein said flattened sections are of different lengths and said curled sections are of the same mass from one set of said strips to another.

6. The shock absorbing structure of claim 5, wherein all of said strips have the same thickness, width and number of turns around which said winding sections are wound.

7. The shock absorbing structure of claim 2, wherein all of said strips have the same overall length, width and thickness, and the number of turns wound by said winding sections of different strips is different, and wherein the overall length of said strips is the sum of the length of said flattened section and the winding length of said winding sections.

8. A fan comprising a motor and a vibration absorbing structure according to any one of claims 1 to 7, the vibration absorbing structure being attached to a surface of a motor body of the motor.

9. The blower of claim 8, further comprising a blower housing, wherein the motor is mounted to the blower housing via vibration isolators.

10. A range hood comprising a fan as claimed in claim 8 or 9.