Vibration absorption structure and fan and range hood comprising same

Abstract

The vibration absorption structure is installed on a motor body so as to absorb vibration generated by a motor, the vibration absorption structure comprises a plurality of vibration absorption units arranged on the circumferential surface of the motor body at intervals, each vibration absorption unit comprises an elastic piece and a balancing weight, and the elastic pieces are arranged on the circumferential surface of the motor body. The elastic piece is attached to the surface of the motor body, and the balancing weight is connected to the tail end, in the axial direction of the motor body, of the elastic piece; the first ratios of the at least two vibration absorption units are different, and the first ratio is the ratio of the length of the elastic piece to the mass of the balancing weight. According to the vibration absorption structure, the fan comprising the vibration absorption structure and the range hood comprising the vibration absorption structure, through the vibration absorption structure, vibration of the motor body is reduced from the source, noise is effectively reduced, the peak value of multi-frequency vibration is effectively reduced in an elastic vibration absorption mode, abnormal noise is avoided, and the sound experience effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a vibration absorbing structure and a fan and a range hood comprising the same. Background Art

[0002] Under certain working conditions, the range hood fan will produce strong vibration noise problems, especially the 24th and 30th frequency abnormal noise problems. Reducing the transmission of the fan body vibration to the mounting shell is a way to solve this kind of vibration noise. The traditional solution is to add a vibration isolation pad between the fan body and the mounting shell. The general vibration isolation pad is made of rubber material and is designed with different shapes or hardness.

[0003] However, traditional vibration isolation pads only isolate vibrations and cannot directly reduce the vibration of the motor itself. Moreover, due to the complexity of the transmission path, some vibrations are transmitted to the rear end of the fan through the vibration isolation pads, and the vibrations are amplified. Traditional vibration isolation pad solutions cannot achieve a good effect in improving abnormal noise. The vibration isolation pads are limited in frequency or order for abnormal noise and are not effective for multiple discrete vibration peak points. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defect of poor effect of reducing fan vibration in the prior art, and to provide a vibration absorbing structure and a fan and a range hood including the same.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A vibration absorbing structure is installed on a motor body to absorb vibrations generated by the motor. The vibration absorbing structure includes a plurality of vibration absorbing units arranged at intervals along the circumferential surface of the motor body, each of the vibration absorbing units includes an elastic member and a counterweight block, the elastic member is attached to the surface of the motor body, and the counterweight block is connected to the end of the elastic member along the axial direction of the motor body; at least two of the vibration absorbing units have different first ratios, which are the ratio of the length of the elastic member to the mass of the counterweight block.

[0007] In this solution, the vibration absorption structure can directly absorb the vibration generated by the motor by attaching the elastic member to the surface of the motor body and connecting the counterweight to the end of the elastic member, thereby reducing the vibration of the motor body from the source and effectively reducing the noise. At least two vibration absorption units adopt different first ratios, so that the vibration absorption structure can absorb at least two discrete vibrations of different frequencies, and effectively reduce the peak value of multiple frequency vibrations by elastic vibration absorption, avoiding abnormal noise and improving the sound experience effect. Among them, the ratio of the length of the elastic member to the mass of the counterweight determines the vibration frequency. Therefore, by adjusting the length of the elastic member and / or the mass of the counterweight, vibrations of different frequencies can be absorbed, thereby improving the absorption effect of multiple discrete frequency vibrations.

[0008] Preferably, the vibration absorbing unit is an elastic coil, the elastic member is a flattened section of the coil, and the counterweight block is a curled section of the flattened section extending axially along the motor body and wound into a plurality of circles; the first ratio of at least two of the coils is different.

[0009] In this solution, the vibration absorbing unit uses an elastic coil, which not only has an elastic effect, but also can flexibly adjust the length of the flattened section and the mass of the curled section according to the need to absorb vibrations of different frequencies. The length of the flattened section can be adjusted by increasing or decreasing the number of turns of the curled section, or by reducing or extending the overall length of the coil; and the mass of the curled section can be adjusted by increasing or decreasing the number of turns of the curled section, which has better adjustment flexibility and stronger adaptability.

[0010] Preferably, the plurality of rolls are divided into at least two groups of rolls, and the first ratios of the rolls in different groups are different; and the lengths of the flattened sections of all the rolls in the same group are the same.

[0011] In this solution, by dividing a plurality of coils into at least two groups of coils with different first ratios, the vibration absorbing structure can absorb vibrations of at least two different frequencies. All coils in the same group use flattened sections with the same length, so that all coils of the vibration absorbing structure have regular shapes and are easy to process and manufacture.

[0012] Preferably, the coils of different groups are arranged alternately.

[0013] In this solution, the strips of different groups are alternately arranged and arranged regularly, so that the strips of the same group are arranged in a regular order on the circumferential surface, which is conducive to the effect of absorbing vibration and reducing noise.

[0014] Preferably, between different groups of the coils, the lengths of the flattened sections are different, and the masses of the curled sections are the same.

[0015] In this solution, different first ratios of the coils in different groups are achieved by adopting a method in which the masses of the curled sections are the same and the lengths of the flattened sections are different.

[0016] Preferably, the thickness, width and number of turns of all the coiled strips are the same.

[0017] In this solution, the above-mentioned setting is adopted, the shape of the coil is regular and easy to process; at the same time, the three factors (thickness, width and number of windings) are the same, which ensures that the quality of the curled sections of different groups of coils is the same.

[0018] Preferably, the total length, width and thickness of all the coils are the same, and the number of turns of the curled sections of different coils is different; wherein the total length of the coil is the sum of the length of the flattened section and the winding length of the curled section.

[0019] In this solution, the above arrangement is adopted, and the shape of the coil is regular, which is easy to manufacture. Within the same total length range of the coil, different first ratios can be obtained by allocating the ratio between the length of the flattened section and the winding length of the curled section, so that the coil can adapt to different frequencies.

[0020] A fan comprises a motor and the vibration absorbing structure as described above, wherein the vibration absorbing structure is attached to the surface of a motor body of the motor.

[0021] In this solution, the fan reduces the vibration of the motor body from the source through the above-mentioned vibration absorption structure, effectively reduces the noise, and effectively reduces the peak value of multiple frequency vibration in a flexible vibration absorption manner, avoids abnormal noise, and improves the sound experience effect.

[0022] Preferably, the fan further comprises a fan housing, and the motor is mounted on the fan housing via a vibration isolation pad.

[0023] In this solution, the fan avoids the transmission of the fan vibration to the fan housing through the vibration isolation pads provided above, thereby further improving the shock absorption and noise reduction effects of the fan.

[0024] A range hood comprises the fan as described above.

[0025] In this solution, the range hood reduces the vibration of the motor body from the source through the above-mentioned fan, effectively reduces the noise, and effectively reduces the peak value of multiple frequency vibration by elastic vibration absorption, avoids abnormal noise, and improves the sound experience effect.

[0026] The positive and progressive effect of the present invention is that the vibration absorption structure and the fan and range hood including the same reduce the vibration of the motor body from the source through the above-mentioned vibration absorption structure, effectively reduce the peak value of multiple frequency vibration by elastic vibration absorption, avoid abnormal noise, and improve the sound experience effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the structure of the vibration absorbing structure of Example 1 of the present invention.

[0028] Figure 2 Schematic diagram of the structure of the vibration absorbing unit of Example 1 of the present invention.

[0029] Figure 3 This is a schematic diagram of the structure of the fan according to Example 1 of the present invention.

[0030] Figure 4 This is a schematic diagram of the structure of the range hood according to Embodiment 1 of the present invention.

[0031] Description of reference numerals:

[0032] Vibration absorbing structure 1

[0033] Vibration absorption unit 2

[0034] Elastic part 3

[0035] Counterweight 4

[0036] Steel ring 5

[0037] Roll 6

[0038] The first set of rolls 61

[0039] The second set of roll strips 62

[0040] Flatten segment 7

[0041] Curly section 8

[0042] Axial direction of the motor body A

[0043] Fan 9

[0044] Motor body 10

[0045] Fan housing 11

[0046] Vibration isolation pad 12

[0047] Range hood 13 DETAILED DESCRIPTION

[0048] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0049] Example 1

[0050] This embodiment provides a vibration absorbing structure 1, which is installed on a motor body 10 to absorb vibrations generated by the motor. The motor is applied to a fan 9 of a range hood 13, and is specifically installed inside a fan housing 11. The motor drives an impeller (not shown) of the fan 9 to rotate, and smoke from the range hood 13 is sucked and discharged.

[0051] like Figure 1-2 As shown, the vibration absorbing structure 1 includes a plurality of vibration absorbing units 2 spaced apart along the circumferential surface of the motor body 10, each vibration absorbing unit 2 includes an elastic member 3 and a counterweight block 4, the elastic member 3 is attached to the surface of the motor body 10, and the counterweight block 4 is connected to the end of the elastic member 3 along the axial direction of the motor body 10; the first ratio of at least two vibration absorbing units 2 is different, and the first ratio is the ratio of the length of the elastic member 3 to the mass of the counterweight block 4.

[0052] Specifically, in this embodiment, the vibration absorbing unit 2 is an elastic coil 6, which is a coil 6 made of an elastic steel strip. The vibration absorbing structure 1 includes a steel ring 5 and a plurality of coils 6 connected to the steel ring 5, the plurality of coils 6 are arranged at intervals along the circumferential surface of the motor body 10, the elastic member 3 is a flattened section 7 of the coil 6, and the counterweight 4 is a curled section 8 of the flattened section 7 extending along the axial direction of the motor body 10 and wound into a plurality of circles. On the circumferential surface of the motor body 10, at least two coils 6 have different first ratios.

[0053] The vibration absorbing structure 1 can directly absorb the vibration generated by the motor by attaching the elastic member 3 to the surface of the motor body 10, and the counterweight block 4 is connected to the end of the elastic member 3, thereby reducing the vibration of the motor body 10 from the source and effectively reducing the noise. At least two vibration absorbing units 2 use different first ratios, so that the vibration absorbing structure 1 can absorb at least two discrete vibrations of different frequencies, and effectively reduce the peak value of multiple frequency vibrations by elastic vibration absorption, avoiding abnormal noise and improving the sound experience effect. Among them, according to the calculation formula of the vibration frequency (The calculation formula for the vibration frequency is the prior art), k is the length of the elastic member 3, and m is the mass of the counterweight 4. It can be seen that the ratio of the length of the elastic member 3 to the mass of the counterweight 4 determines the vibration frequency. Therefore, by adjusting the length of the elastic member 3 and / or the mass of the counterweight 4, vibrations of different frequencies can be absorbed, thereby improving the absorption effect of multiple discrete frequency vibrations.

[0054] In other embodiments, the elastic member 3 may also be other parts with elastic effects, and the counterweight 4 may also be other parts of different sizes or variable masses. For example, the counterweight 4 may be an elastic sphere of different sizes hung on the end of the elastic member 3. However, it is not as good as the vibration absorbing unit 2 of this embodiment, which uses an elastic coil 6, which not only has an elastic effect, but also can flexibly adjust the length of the flattened section 7 and the mass of the curled section 8 according to the need to absorb vibrations of different frequencies. The length adjustment of the flattened section 7 can be achieved by increasing or decreasing the number of turns of the curled section 8, or by reducing or extending the overall length of the coil 6; and the mass adjustment of the curled section 8 can be achieved by increasing or decreasing the number of turns of the curled section 8, which has better adjustment flexibility and stronger adaptability.

[0055] Among them, a plurality of coils 6 are divided into at least two groups of coils 6, and the first ratios of coils 6 in different groups are different; the lengths of the flattened sections 7 of all coils 6 in the same group are the same. Specifically, in this embodiment, a plurality of coils 6 in one circle are divided into two groups with different lengths of the flattened sections 7, namely the first group of coils 61 and the second group of coils 62. In the first group of coils 61, the flattened sections 7 of a plurality of coils 6 have the same length but are shorter, and the number of coiled sections 8 is more and the mass is larger; in the second group of coils 62, the flattened sections 7 of a plurality of coils 6 have the same length but are longer, and the number of coiled sections 8 is less and the mass is smaller, so that the two groups obtain different first ratios. In other embodiments, according to the need of vibration absorption frequency, all coils 6 can also be divided into more groups to absorb 3 or more different vibration frequencies.

[0056] The vibration absorbing structure 1 can absorb vibrations of at least two different frequencies by dividing a plurality of coils 6 into at least two groups of coils 6 with different first ratios. All coils 6 in the same group have flattened sections 7 of the same length, so that all coils 6 of the vibration absorbing structure 1 have regular shapes, which is convenient for processing and manufacturing.

[0057] The coils 6 of different groups are arranged alternately, that is, the first group of coils 61 and the second group of coils 62 are arranged alternately. The coils 6 of different groups are arranged alternately and regularly, so that the coils 6 of the same group are arranged in a regular order on the circumferential surface, which is conducive to the effect of absorbing vibration and reducing noise. In other embodiments, according to the needs of the vibration absorption effect, the coils 6 of different groups may not be arranged alternately. For example, according to the specific position of the vibration source of the motor in the circumferential direction, multiple coils 6 of the first group or the second group may be arranged locally and continuously.

[0058] There are many ways to form different first ratios in multiple groups of coils 6. For example, the lengths of the flattened sections 7 of different groups of coils 6 may be different, and the masses of the curled sections 8 may be the same. In other embodiments, the flattened sections 7 of all coils 6 in the circumferential direction may be the same, while the masses of the curled sections 8 may be different. In this case, the ratios between the lengths of the flattened sections 7 and the masses of the curled sections 8 of different groups of coils 6 may also be different, which may enable the vibration-absorbing structure 1 to absorb vibrations of different frequencies.

[0059] In other embodiments, in order to obtain the same quality of the curled sections 8 of different groups, the thickness, width and number of turns of all the coils 6 can be designed to be the same, so that the shape of the coils 6 is regular and easy to process. The same three factors (thickness, width and number of turns) ensure that the quality of the curled sections 8 of different groups of coils 6 is the same. Because in this embodiment, the lengths of the flattened sections 7 of the two groups of coils 6 are different, if the curled sections 8 of the two groups of coils 6 have the same quality, different first ratios can also be achieved.

[0060] Since the quality of the curled section 8 is related to the width, thickness and number of windings of the coil 6, in other embodiments, the required quality of the curled section 8 can be obtained by adjusting the width, thickness and number of windings of the coil 6.

[0061] In this embodiment, the total length, width and thickness of all the coils 6 are the same, and the number of turns of the curling sections 8 of the two groups of coils 6 is different, that is, the length of the flattened section 7 of the first group of coils 61 is shorter, and the number of turns of the curling section 8 is more; while the length of the flattened section 7 of the second group of coils 62 is longer, and the number of turns of the curling section 8 is less; but the total length of the two groups of coils 6 is the same, and the total length is the sum of the length of the flattened section 7 and the winding length of the curling section 8. In this way, the shape of the coil 6 is regular and easy to manufacture. Within the same total length range of the coil 6, by allocating the ratio between the length of the flattened section 7 and the winding length of the curling section 8, different first ratios can be obtained, so that the coil 6 can adapt to different frequencies.

[0062] When the vibration absorbing structure 1 of this embodiment is applied, the natural frequency of vibration absorption is usually determined by the peak frequency of the vibration spectrum of the range hood 13 in a certain gear working state. According to the natural frequency f and the above formula, the appropriate length k of the elastic member 3 and the mass m of the counterweight block 4 are selected in turn. After the width, thickness and material of the coil 6 are determined, the length of the coil 6 when rolled up can be designed according to the magnitude of the vibration absorbing frequency, and the mass m is wound, while the length k of the flattened section 7 is determined by the remaining length.

[0063] Example 2

[0064] This embodiment provides a fan 9, such as Figure 3As shown, the fan 9 includes a motor and a vibration absorbing structure 1 as in Example 1, and the vibration absorbing structure 1 is attached to the surface of the motor body 10 of the motor. The fan 9 reduces the vibration of the motor body 10 from the source through the vibration absorbing structure 1, effectively reduces the noise, effectively reduces the peak value of the multiple frequency vibration in an elastic vibration absorbing manner, avoids abnormal noise, and improves the sound experience effect.

[0065] Among them, Figure 3 As shown, the fan 9 also includes a fan housing 11, and the motor is installed on the fan housing 11 through a vibration isolation pad 12. The fan 9 prevents the vibration of the fan 9 from being transmitted to the fan housing 11 through the vibration isolation pad 12, further improving the vibration reduction and noise reduction effect of the fan 9.

[0066] Example 3

[0067] like Figure 4 As shown, this embodiment provides a range hood 13, which includes the fan 9 as in Embodiment 2. The range hood 13 reduces the vibration of the motor body 10 from the source through the fan 9, effectively reduces the noise, effectively reduces the peak value of the multiple frequency vibration in an elastic vibration absorption manner, avoids abnormal noise, and improves the sound experience effect.

[0068] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A vibration absorbing structure, mounted on a motor body to absorb the vibration generated by the motor, characterized in that: The vibration absorbing structure comprises a plurality of vibration absorbing units arranged at intervals along the circumferential surface of the motor body, each of the vibration absorbing units comprises an elastic member and a counterweight block, the elastic member is attached to the surface of the motor body, and the counterweight block is connected to the end of the elastic member along the axial direction of the motor body; The first ratio of at least two of the vibration absorbing units is different, and the first ratio is the ratio of the length of the elastic member to the mass of the counterweight block.

2. The vibration absorbing structure according to claim 1, characterized in that: The vibration absorbing unit is an elastic coil, the elastic member is a flattened section of the coil, and the counterweight block is a curled section of the flattened section extending along the axial direction of the motor body and wound into a plurality of circles; the first ratio of at least two of the coils is different.

3. The vibration absorbing structure according to claim 2, characterized in that: The plurality of rolls are divided into at least two groups of rolls, and the first ratios of the rolls in different groups are different; and the lengths of the flattened sections of all the rolls in the same group are the same.

4. The vibration absorbing structure according to claim 3, characterized in that: The coils of different groups are arranged alternately.

5. The vibration absorbing structure according to claim 3, characterized in that: The lengths of the flattened sections are different between the coils of different groups, and the masses of the curled sections are the same.

6. The vibration absorbing structure according to claim 5, characterized in that: The thickness, width and number of turns of all the coiled strips are the same.

7. The vibration absorbing structure according to claim 2, characterized in that: The total length, width and thickness of all the coils are the same, and the number of turns of the curling sections of different coils is different; wherein the total length of the coil is the sum of the length of the flattened section and the winding length of the curling section.

8. A fan, characterized in that: The fan comprises a motor and a vibration absorbing structure as claimed in any one of claims 1 to 7, wherein the vibration absorbing structure is attached to the surface of a motor body of the motor.

9. The fan according to claim 8, characterized in that: The fan also includes a fan housing, and the motor is installed on the fan housing through a vibration isolation pad.

10. A range hood, characterized in that: The range hood comprises the fan as claimed in claim 8 or 9.

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