A dynamic vibration absorber and a laundry treating apparatus

Abstract

The embodiments of the present application provide a dynamic vibration absorber and a laundry treatment device. The dynamic vibration absorber includes a vibration arm, and the vibration directions of the first two vibration modes of the vibration arm are orthogonal and perpendicular to the length direction of the vibration arm. In the dynamic vibration absorber of the embodiments of the present application, the vibration directions of the first two vibration modes of the vibration arm are orthogonal. The vibrations of the vibration arm in the first vibration mode and the second vibration mode are mainly translational, and the difference between the first natural frequency and the second natural frequency is not large. When the excitation frequency is within the above-mentioned first natural frequency point, the second natural frequency point, and the frequency band between the first natural frequency point and the second natural frequency point, the dynamic vibration absorber has good vibration absorption ability, suppresses the vibration of the machine body, and broadens the bandwidth of the frequency band suppressed by the dynamic vibration absorber in the low-frequency range.

Description

Technical Field

[0001] The present application relates to the technical field of clothing washing and care, and in particular to a dynamic vibration absorber and a clothing treatment device. Background Art

[0002] Taking a washing machine as an example, during the working process of the washing machine, affected by the weight and eccentricity of the clothes, etc., the natural frequency of the drum assembly of the washing machine will change. In addition, the drum assembly is generally connected to the cabinet through suspension springs and shock absorbers. Therefore, the natural frequency of the drum assembly during operation is relatively low. During the dehydration process of the washing machine, a large load eccentricity may occur. At low-speed resonance, the shaking of the machine body will intensify, and in severe cases, situations such as barrel collision and displacement may occur. Summary of the Invention

[0003] In view of this, embodiments of the present application are expected to provide a dynamic vibration absorber and a clothing treatment device that can achieve a better low-frequency vibration absorption effect.

[0004] Embodiments of the present application provide a dynamic vibration absorber, including a vibration arm, and the vibration directions of the first two vibration modes of the vibration arm are orthogonal and perpendicular to the length direction of the vibration arm.

[0005] In some possible implementation manners, the difference between the natural frequencies of the first two vibration modes of the vibration arm is not less than 5 Hz.

[0006] In some possible implementation manners, the difference between the natural frequencies of the first two vibration modes of the vibration arm is 5 Hz to 13 Hz.

[0007] In some possible implementation manners, the natural frequency of the first vibration mode of the dynamic vibration absorber is 160 Hz to 180 Hz.

[0008] In some possible implementation manners, the widths of the vibration arm in two orthogonal directions perpendicular to its length direction are different.

[0009] In some possible implementation manners, the dynamic vibration absorber includes a vibration plate and a holding frame, the holding frame is arranged around the periphery of the vibration plate, one end of the vibration arm is connected to the vibration plate, and the other end of the vibration arm is a free end.

[0010] In some possible implementation manners, the natural frequencies of the first two vibration modes are determined by at least one of the length of the vibration arm, the cross-sectional area of the vibration arm, and the thickness of the vibration plate.

[0011] In some possible implementation manners, the number of the dynamic vibration absorbers is multiple, the holding frames of the dynamic vibration absorbers are connected to each other, and the vibration arms are parallel to each other.

[0012] In some possible embodiments, the dynamic vibration absorber includes a connecting rod, one end of the connecting rod is connected to the holding frame, and the other end of the connecting rod is used to connect the dynamic vibration absorber to a target installation position.

[0013] An embodiment of the present application provides a laundry treatment device, including a body and the dynamic vibration absorber according to any embodiment of the present application, and the dynamic vibration absorber is arranged on the body.

[0014] In some possible embodiments, the body includes a drum portion and a drive assembly arranged below the drum portion and used to drive the inner drum of the drum portion to rotate, the dynamic vibration absorber is connected to the drive assembly, and the vibration arm is arranged in the up and down direction.

[0015] In some possible embodiments, the drive assembly includes a clutch, the number of the dynamic vibration absorbers is multiple, and the multiple dynamic vibration absorbers are arranged on the clutch and arranged along the circumferential direction of the clutch.

[0016] In some possible embodiments, the length direction of the vibration arm is parallel to the axis of the drum portion; or, the included angle between the length direction of the vibration arm and a reference line is less than 5°, where the reference line is: a straight line parallel to the axis of the drum portion and intersecting with the length direction of the vibration arm.

[0017] For the dynamic vibration absorber of the embodiment of the present application, the vibration directions of the first two vibration modes of the vibration arm are orthogonal, the vibrations of the vibration arm in the first vibration mode and the second vibration mode are mainly translational, and the first natural frequency or the second natural frequency does not differ much. For example, in the XY rectangular coordinate system, the vibration direction of the first vibration mode is translational in the X direction, and the vibration direction of the second vibration mode is translational in the Y direction.

[0018] For the dynamic vibration absorber of the embodiment of the present application, when the excitation frequency is within the above-mentioned first natural frequency point, second natural frequency point, and the frequency band between the first natural frequency point and the second natural frequency point, the dynamic vibration absorber has good vibration absorption ability, suppresses the vibration of the body, and broadens the bandwidth of the frequency band suppressed by the dynamic vibration absorber in the low-frequency range. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the dynamic vibration absorber according to the first embodiment of the present application;

[0020] Figure 2 It is a schematic structural diagram of the dynamic vibration absorber according to the second embodiment of the present application;

[0021] Figure 3 For multiple Figure 2 It is a schematic structural diagram of the combined dynamic vibration absorbers shown;

[0022] Figure 4 Schematic diagram of the power absorber of the first embodiment of the present application assembled to the clutch of the laundry treatment device;

[0023] Figure 5 Comparison frequency spectrum diagrams of the embodiment of the present application, the spring mass damper system in the related art, and the passive vibration absorber.

[0024] Description of reference numerals

[0025] Power absorber 1; vibration arm 11; vibration plate 12; holding frame 13; connecting rod 14;

[0026] Clutch 2;

[0027] Mounting bracket 3. Detailed implementation manners

[0028] The following further describes the implementation manners of the present application in detail in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0029] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] The embodiment of the present application provides a power absorber 1. Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , including a vibration arm 11. The vibration arm 11 is a cantilever beam and serves as the oscillator of the power absorber 1.

[0031] The vibration directions of the first two vibration modes of the vibration arm 11 are orthogonal and perpendicular to the length direction of the vibration arm 11.

[0032] Among them, the statement that the vibration directions of the first two vibration modes are orthogonal and perpendicular to the length direction of the vibration arm 11 means that the vibration directions of the first two vibration modes are perpendicular to each other in the plane perpendicular to the length direction of the vibration arm 11. That is to say, the two orthogonal directions and the length direction form a three-dimensional rectangular coordinate system.

[0033] Among them, the first two vibration modes refer to the first vibration mode and the second vibration mode of the vibration arm 11.

[0034] Mechanically speaking, the vibrating arm is a continuous elastic body with an infinite number of degrees of freedom, that is, an infinite number of natural frequencies and principal vibration modes. If a reasonable excitation frequency is applied to the vibrating arm and this excitation frequency happens to be equal to a certain natural frequency of the vibrating arm, resonance will occur. The vibration mode corresponding to this natural frequency is called the principal vibration mode of this order. At this time, the influence of other vibration modes of each order is so small that it can be ignored. We usually only focus on the frequencies of low-order vibration modes, especially the natural frequency of the first-order vibration mode, because the lower the frequency, the easier it is to be excited by the outside world.

[0035] It should be noted that the range of the natural frequency of the dynamic vibration absorber 1 in the embodiments of the present application needs to include the excitation frequency to be suppressed.

[0036] When the object on which the dynamic vibration absorber 1 is installed vibrates, the vibrating arm 11 will generate a certain vibration response, and its dynamic characteristics mainly depend on its natural frequencies, principal vibration modes, damping ratios, etc. of each order. These parameters are also vibration mode parameters.

[0037] That is to say, the vibration mode corresponding to the resonance of the vibrating arm 11 at the first natural frequency is the first-order vibration mode, and the vibration mode corresponding to the resonance of the vibrating arm 11 at the second natural frequency is the second-order vibration mode.

[0038] In the dynamic vibration absorber 1 of the embodiments of the present application, the vibration directions of the first two vibration modes of the vibrating arm 11 are orthogonal. The vibrations of the vibrating arm 11 in the first-order vibration mode and the second-order vibration mode are mainly swinging in the direction perpendicular to the length direction, and the difference between the first natural frequency and the second natural frequency is not large. For example, in the XY rectangular coordinate system, the vibration direction of the first-order vibration mode is swinging in the X direction, and the vibration direction of the second-order vibration mode is swinging in the Y direction. That is to say, most of the vibration energy of the object on which the dynamic vibration absorber 1 is installed is only enough to excite the swinging of the vibrating arm 11 rather than torsion.

[0039] When the excitation frequency is within the above-mentioned first natural frequency point, second natural frequency point, and the frequency band between the first natural frequency point and the second natural frequency point, the dynamic vibration absorber 1 has good vibration absorption ability, and broadens the frequency band suppressed by the dynamic vibration absorber 1 in the low-frequency range.

[0040] The application scenarios of the dynamic vibration absorber in the embodiments of the present application are not limited. The present application describes the dynamic vibration absorber applied to a laundry treatment device as an example.

[0041] The embodiments of the present application provide a laundry treatment device. Please refer to Figure 1 , which includes a body and the dynamic vibration absorber 1 of any embodiment of the present application. The dynamic vibration absorber 1 is arranged on the body.

[0042] It should be noted that the body is the general term for the overall structure that realizes the required functions of the clothing treatment device. Specifically, in the embodiments of the present application, the structures of the clothing treatment device other than the dynamic vibration absorber 1 are collectively referred to as the body. For example, the body includes a box body, a drum assembly, a door body, a workbench, a base, a drive assembly for driving the inner drum of the drum assembly to rotate, etc.

[0043] The specific structural form of the drum assembly is not limited.

[0044] Exemplarily, in some embodiments, the drum assembly includes an outer tub and an inner drum rotatably disposed within the outer tub. Among them, the inner drum can be a perforated inner drum or a non-perforated inner drum. A perforated inner drum refers to an inner drum that relies on the outer tub to hold water, and a non-perforated inner drum refers to an inner drum that relies on itself to hold water.

[0045] It should be noted that in addition to the outer tub and the inner drum, the drum assembly also includes accessories attached to the outer tub, such as counterweights, and structures attached to the inner drum, such as lifting ribs, etc.

[0046] In another embodiment, the drum assembly may not be provided with an outer tub, but a water receiving tray is provided below the inner drum for receiving the washing water discharged from the inner drum. In this embodiment, the inner drum is a non-perforated inner drum.

[0047] It should be noted that in some embodiments, the drum assembly can be a horizontal axis type, that is, the axis of the drum assembly is arranged in the front-rear direction, and the drum assembly adopts a drum type structure, such as a drum washing machine, a drum dryer, a drum washing and drying integrated machine, etc.

[0048] In some other embodiments, the drum assembly can be a vertical axis type, the axis of the drum assembly is arranged in the up-down direction, and the drum assembly adopts a pulsator type structure, such as a pulsator washing machine.

[0049] In the embodiments of the present application, the axis of the drum assembly refers to the rotation axis of the inner drum.

[0050] In the embodiments of the present application, "front" in the "front-rear direction" refers to the side facing the user, and "rear" represents the direction opposite to "front".

[0051] It can be understood that the drive assembly at least includes a motor. The motor, as a power source, outputs torque to drive the inner drum and / or the pulsator to rotate.

[0052] The dynamic vibration absorber 1 can be disposed at any suitable position of the body. For example, the dynamic vibration absorber 1 can be disposed on the drum assembly, the box body, the workbench, the base, or the drive assembly, etc.

[0053] It can be understood that the drum assembly is generally connected to the box body assembly through suspension springs and shock absorbers. Therefore, the first-order natural frequency of the whole machine is relatively low.

[0054] In the related art, a spring-mass vibration damping system is provided on a laundry treating apparatus. The spring-mass vibration damping system is a single-degree-of-freedom system with a constant natural frequency, that is, only the first natural frequency. The spring-mass vibration damping system is effective only at its natural frequency and in a very narrow frequency band (about 1 Hz) near the natural frequency. That is to say, the spring-mass vibration damping system is only effective for a single frequency point. When the whole laundry treating apparatus is in operation, the rotation speed of the inner drum fluctuates within a certain range, resulting in the movement of the vibration peak frequency point, and the amplitudes in a relatively wide frequency band near the vibration peak are often relatively large. Therefore, the vibration damping and noise reduction effect of the spring-mass vibration damping system in the related art is not good.

[0055] For the laundry treating apparatus according to the embodiment of the present application, when the excitation frequency is within the first natural frequency point, the second natural frequency point, and the frequency band between the first natural frequency point and the second natural frequency point, the dynamic vibration absorber 1 has good vibration absorption ability, suppresses the vibration of the machine body, and broadens the frequency band suppressed by the dynamic vibration absorber 1 in the low-frequency range.

[0056] Please refer to Figure 5 , Figure 5 which is a comparative frequency spectrum diagram of the spring-mass vibration damping system and the non-powered vibration absorber in the present application and the related art. Figure 5 Among them, the original frequency spectrum is the frequency spectrum diagram without a dynamic vibration absorber; the frequency spectrum of the spring-mass vibration damping system is the frequency spectrum diagram with a spring-mass vibration damping system; the frequency spectrum of the dynamic vibration absorber according to the embodiment of the present application is the frequency spectrum diagram with the dynamic vibration absorber according to the embodiment of the present application.

[0057] As can be seen from Figure 5 , when there is no dynamic vibration absorber, the amplitude of the machine body is relatively large at the resonance frequency. When there is a spring-mass vibration damping system, the amplitude of the machine body is weakened, but the vibration absorption bandwidth is relatively narrow. When the dynamic vibration absorber according to the embodiment of the present application is provided, the amplitude of the machine body can be further weakened, and the vibration absorption bandwidth is significantly wider than that of the spring-mass vibration damping system.

[0058] Exemplarily, the difference between the natural frequencies of the first two vibration modes of the vibration arm 11 is not less than 5 Hz (Hertz). For example, the natural frequency of the first vibration mode is f1, and the natural frequency of the second vibration mode is f2, and f2 - f1 ≥ 5 Hz. That is to say, in this embodiment, the dynamic vibration absorber 1 has a vibration absorption frequency band bandwidth of at least 5 Hz.

[0059] Exemplarily, the difference between the natural frequencies of the first two vibration modes of the vibrating arm 11 is 5 Hz to 13 Hz. For example, 5 Hz, 6 Hz, 7 Hz, 8 Hz, 9 Hz, 10 Hz, 11 Hz, 12 Hz, 13 Hz. This range can enable the vibrating arm 11 to have a suitable bandwidth of the vibration absorption frequency band.

[0060] Exemplarily, the natural frequency of the first vibration mode of the dynamic vibration absorber 1 is 160 Hz to 180 Hz. For example, 160 Hz, 165 Hz, 168 Hz, 170 Hz, 172 Hz, 176 Hz, 178 Hz, 180 Hz. The natural frequency of the dynamic vibration absorber 1 is the natural frequency of the dynamic vibration absorber 1 as a whole system. That is to say, the frequency range to be suppressed by the dynamic vibration absorber 1 is 160 Hz to 180 Hz. The amplitude of the laundry treating apparatus is relatively large within this frequency band range. Therefore, designing the natural frequency of the dynamic vibration absorber 1 within this frequency band range can play a better role in absorbing vibration for the laundry treating apparatus.

[0061] It should be noted that there are various ways to make the natural frequencies of the first vibration modes of the vibrating arm 11 different in two orthogonal directions perpendicular to its length direction. For example, it can be achieved by different mass distributions of the vibrating arm 11 in the two orthogonal directions.

[0062] For another example, the widths of the vibrating arm 11 in two orthogonal directions perpendicular to its length direction are different. Please refer to Figure 1 and Figure 2 , the width of the vibrating arm 11 in one orthogonal direction is D1, and the width in the other orthogonal direction is D2, then D1 - D2 ≠ 0.

[0063] In this embodiment, the stiffnesses of the vibrating arm 11 in the two width directions are different, so that the natural frequencies of the vibrating arm 11 in two orthogonal directions perpendicular to its length direction are different. In this embodiment, the implementation method is simple and convenient for processing and manufacturing.

[0064] The natural frequency of the vibrating arm is related to parameters such as its elastic modulus, density, cross-sectional shape, and length. For the same vibrating arm, the widths in two orthogonal directions determine the bandwidth between the natural frequencies of the first two modes. Therefore, in the design stage, after considering the frequency to be suppressed, the material of the vibrating arm, and the length of the vibrating arm, the widths of the vibrating arm 11 in the two orthogonal directions are reasonably designed.

[0065] The specific difference between the two widths of the vibrating arm 11 can be jointly determined according to the stiffness of the vibrating arm 11, the length, and other structures of the dynamic vibration absorber 1.

[0066] The arrangement position of the vibrating arm 11 is not limited. It can be arranged on the box body, the barrel part, or other positions.

[0067] It should be noted that the vibration direction of the laundry treating apparatus changes during operation. Among them, the vibration is more obvious in each direction perpendicular to the axis of the drum unit.

[0068] For example, when the axis of the drum unit is arranged in the vertical direction, the vibration of the laundry treating apparatus in each direction within the horizontal plane is more obvious. For example, the vibration in the front-back, left-right, or inclined direction between the front-back direction and the left-right direction is more obvious.

[0069] For another example, when the axis of the drum unit is arranged in the front-back direction, the vibration of the laundry treating apparatus in each direction within the vertical plane is more obvious. For example, the vibration in the up-down, left-right, or inclined direction between the up-down direction and the left-right direction is more obvious.

[0070] Exemplarily, the length direction of the vibration arm 11 is substantially parallel to the axis of the drum unit. For example, in some embodiments, the length direction of the vibration arm 11 is parallel to the axis of the drum unit.

[0071] In some other embodiments, the included angle between the length direction of the vibration arm 11 and the reference line is less than 5°. Wherein, the reference line is: a straight line parallel to the axis of the drum unit and intersecting with the length direction of the vibration arm 11.

[0072] That is to say, the vibration directions of the first two vibration modes of the vibration arm 11 are substantially perpendicular to the axis of the drum unit. Since the vibration amplitude of the laundry treating apparatus in each direction perpendicular to its axis is relatively large, therefore, the vibration modes of the first two vibration modes of the vibration arm 11 can be more easily excited, which is convenient for the dynamic vibration absorber 1 to exert a better vibration absorption effect.

[0073] In some embodiments, one end of the vibration arm 11 can be directly connected to the machine body, as long as the first two natural frequencies of the vibration arm 11 can be excited within its designed vibration suppression frequency range.

[0074] In some embodiments, please refer to Figure 1 and Figure 2 , the dynamic vibration absorber 1 includes a vibration plate 12 and a holding frame 13. The holding frame 13 is arranged around the periphery of the vibration plate 12. One end of the vibration arm 11 is connected to the vibration plate 12, and the other end of the vibration arm 11 is a free end.

[0075] It should be noted that the vibration plate 12 is relatively thin, so that the vibration arm 11 can be more easily excited to the first two vibration modes at low frequencies.

[0076] The holding frame 13 provides installation and structural support for the vibration plate 12, so that the periphery of the vibration plate 12 has sufficient structural strength, enabling the vibration plate 12 to vibrate reliably in two orthogonal directions.

[0077] It should be noted that the thickness and material of the vibration plate 12, and the length, width, and material of the vibration arm 11 are related to the natural frequency of the vibration arm 11, and can be assembled according to actual requirements.

[0078] In some embodiments, the natural frequencies of the first two vibration modes of the vibration arm 11 are determined by at least one of the length of the vibration arm 11, the cross-sectional area of the vibration arm 11, and the thickness of the vibration plate 11. For example, for different usage scenarios, during the design stage, any one or two of the three parameters can be fixed, and by adjusting one of the parameters, the natural frequencies of the first two vibration modes of the vibrating body 11 can be adjusted.

[0079] The number of the dynamic vibration absorbers 1 is not limited, and can be one or multiple.

[0080] In some implementation schemes, the number of the dynamic vibration absorbers 1 is multiple, and the length directions of the vibration arms 11 of the multiple dynamic vibration absorbers 1 are substantially parallel.

[0081] It should be noted that the dynamic vibration absorbers 1 can be independent of each other, or can be integrated together to form a whole.

[0082] For example, please refer to Figure 3 , the holding frames 13 of two adjacent dynamic vibration absorbers 1 are connected to each other to form a rigid frame body, and the vibration arms 11 are parallel to each other, that is to say, the vibration arms 11 are arranged in an array.

[0083] In some implementation schemes, please refer to Figure 4 , the multiple dynamic vibration absorbers 1 are independent of each other, and the dynamic vibration absorbers 1 are arranged circumferentially along the axis of the barrel assembly.

[0084] It should be noted that the holding frame 13 can be directly or indirectly assembled to the machine body.

[0085] In some implementation schemes, please refer to Figure 1 and Figure 4 , the dynamic vibration absorber 1 includes a connecting rod 14, one end of the connecting rod 14 is connected to the holding frame 13, and the other end of the connecting rod 14 is used to connect the dynamic vibration absorber to the target installation position. For example, in the case of being applied to a laundry treatment device, the target installation position is any appropriate position of the machine body.

[0086] In this embodiment, the connecting rod 14 has a certain length, which can enable the vibration arm 11, the vibration plate 12, and the holding frame 13 to be arranged at appropriate positions on the machine body, avoiding interference with the barrel assembly.

[0087] Exemplarily, the top side of the inner barrel is open to form a clothing access opening, and the driving assembly is arranged below the barrel assembly. That is to say, the axis of the barrel assembly is substantially arranged in the up-down direction. For example, the laundry treatment device is a pulsator washing machine.

[0088] The dynamic vibration absorber 1 is located below the cylinder assembly and is connected to the drive assembly, and the vibration arm 11 is arranged in the vertical direction. In this embodiment, there is enough space below the cylinder assembly to install the dynamic vibration absorber 1 without interfering with the cylinder assembly.

[0089] During the operation of the body, vibrations will be generated, and the cylinder assembly may hit the box body assembly during the vibration process, that is to say, the gap between the circumferential surface of the cylinder assembly and the box body assembly will change.

[0090] In this embodiment, the dynamic vibration absorber 1 is not arranged between the circumferential surface of the cylinder assembly and the box body assembly, thus avoiding interference between the cylinder assembly and the dynamic vibration absorber 1 due to vibration.

[0091] In some embodiments, the drive assembly includes a clutch 2, and the clutch 2 can disconnect and engage the power transmission between the motor shaft of the motor and the inner cylinder. During the washing process, the inner cylinder does not rotate, and during the dehydration process, the inner cylinder rotates.

[0092] The clutch 2 can adopt any structural form in the prior art and will not be elaborated here.

[0093] It should be noted that the motor shaft of the motor can be arranged coaxially with the axis of the cylinder assembly or eccentrically with the axis of the cylinder assembly. Power transmission can be achieved through transmission mechanisms such as belts, or the cylinder can be directly driven to rotate.

[0094] Exemplarily, the body includes a mounting bracket 3, and the motor, clutch 2, etc. are hoisted on the bottom side of the mounting bracket 3, for example, connected by fasteners such as bolts and screws. The cylinder assembly is located above the mounting bracket 3.

[0095] The above-mentioned dynamic vibration absorber 1 can be connected to the motor or, connected to the clutch 2.

[0096] In some embodiments, please refer to Figure 4 , the dynamic vibration absorber 1 is arranged on the clutch 2. The clutch 2 transmits the vibration to the dynamic vibration absorber 1 during the vibration process.

[0097] During the operation of the laundry treatment device, the vibration noise of the housing of the clutch 2 is low-frequency noise and contributes a large amount to the noise of the laundry treatment device. Therefore, by arranging the dynamic vibration absorber 1 on the clutch 2, the vibration transmitted from the meshing of the internal gears of the clutch 2 to the outer shell under the washing condition can be improved, and the vibration noise of the clutch 2 can be significantly reduced, and further the noise radiated from the laundry treatment device can be effectively reduced.

[0098] The number of the dynamic vibration absorbers 1 is plural, and the plural dynamic vibration absorbers are arranged circumferentially along the clutch 2. Since the center of the clutch is located on the axis of the cylinder part, the plural dynamic vibration absorbers can be arranged circumferentially relative to the axis of the cylinder part. For example, they are arranged in circumferential rotational symmetry.

[0099] Exemplarily, the vibration arm 11 is located below the vibration plate 12. The upper end of the vibration arm 11 is connected to the vibration plate 12, and the lower end of the vibration arm 11 is a free end. That is to say, the vibration arm 11 extends downward from the bottom side of the vibration plate 12, so that the space below the clutch 2 can be fully utilized.

[0100] It can be understood that, in some embodiments when space permits, it can also be that the lower end of the vibration arm 11 is connected to the vibration plate 12, and the upper end of the vibration arm 11 is a free end, that is, the vibration arm 11 is located above the vibration plate 12.

[0101] Specifically, in an embodiment where the dynamic vibration absorber 1 has a connecting rod 14, one end of the connecting rod 14 is connected to the holding frame 13, and the other end of the connecting rod 14 is connected to the clutch 2.

[0102] On the one hand, it is convenient for the installation of the dynamic vibration absorber 1 and the clutch 2, that is, there is enough installation operation space even when directly installed on the housing of the clutch 2. On the other hand, by using the existing structure of the clutch 2, the dynamic vibration absorber 1 of the embodiment of the present invention can be added to the existing laundry treatment equipment, so as to realize the upgrading of the product with a relatively small manufacturing cost.

[0103] In the description of the present application, the descriptions with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine the different embodiments or examples described in the present application and the features of different embodiments or examples.

[0104] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A laundry treatment device, characterized in that, Comprising: A body and a dynamic vibration absorber, the dynamic vibration absorber being disposed on the body; The dynamic vibration absorber includes a vibration arm (11), and the vibration directions of the first two vibration modes of the vibration arm (11) are orthogonal and perpendicular to the length direction of the vibration arm (11); The body includes a cylinder part and a drive assembly disposed below the cylinder part and for driving the inner cylinder of the cylinder part to rotate. The dynamic vibration absorber (1) is connected to the drive assembly, and the vibration arm (11) is arranged in the vertical direction; the drive assembly includes a clutch (2), and the number of the dynamic vibration absorbers (1) is multiple. The multiple dynamic vibration absorbers (1) are disposed on the clutch and arranged circumferentially along the clutch (2).

2. The laundry treating apparatus according to claim 1, wherein The difference between the natural frequencies of the first two vibration modes of the vibration arm (11) is not less than 5 Hz.

3. The laundry treating apparatus according to claim 1, wherein The difference between the natural frequencies of the first two vibration modes of the vibration arm (11) is 5 Hz to 13 Hz.

4. The laundry treating apparatus according to claim 1, wherein The natural frequency of the first vibration mode of the dynamic vibration absorber (1) is 160 Hz to 180 Hz.

5. The laundry treatment device according to claim 1, characterized in that, The widths of the vibration arm (11) in two orthogonal directions perpendicular to its length direction are different.

6. The laundry treating apparatus according to any one of claims 1-5, characterized in that, The dynamic vibration absorber (1) includes a vibration plate (12) and a holding frame (13). The holding frame (13) is disposed around the periphery of the vibration plate (12). One end of the vibration arm (11) is connected to the vibration plate (12), and the other end of the vibration arm (11) is a free end.

7. The laundry treating apparatus according to claim 6, wherein, The natural frequencies of the first two vibration modes are determined by at least one of the length of the vibration arm (11), the cross-sectional area of the vibration arm (11), and the thickness of the vibration plate (12).

8. The laundry treating apparatus according to claim 6, wherein The number of the dynamic vibration absorbers (1) is multiple, and the holding frames (13) of the dynamic vibration absorbers (1) are connected to each other, and the vibration arms (11) are parallel to each other.

9. The laundry treating apparatus according to claim 6, wherein, The dynamic vibration absorber (1) includes a connecting rod (14). One end of the connecting rod (14) is connected to the holding frame (13), and the other end of the connecting rod (14) is used to connect the dynamic vibration absorber to a target installation position.

10. The laundry treating apparatus according to claim 1, wherein, The length direction of the vibration arm (11) is parallel to the axis of the cylinder part; or, the included angle between the length direction of the vibration arm (11) and a reference line is less than 5°, where the reference line is: a straight line parallel to the axis of the cylinder part and intersecting with the length direction of the vibration arm (11).

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