CN114197164B - Vibration damper and clothes treatment equipment - Google Patents

Vibration damper and clothes treatment equipment Download PDF

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Publication number
CN114197164B
CN114197164B CN202010988541.5A CN202010988541A CN114197164B CN 114197164 B CN114197164 B CN 114197164B CN 202010988541 A CN202010988541 A CN 202010988541A CN 114197164 B CN114197164 B CN 114197164B
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Prior art keywords
arc
swinging
shaped
chamber
input shaft
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CN202010988541.5A
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CN114197164A (en
Inventor
郑强
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Wuxi Little Swan Electric Co Ltd
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Wuxi Little Swan Electric Co Ltd
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Priority to CN202010988541.5A priority Critical patent/CN114197164B/en
Priority to PCT/CN2020/128842 priority patent/WO2022057066A1/en
Publication of CN114197164A publication Critical patent/CN114197164A/en
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D06F58/04—Details 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Abstract

The embodiment of the application provides a vibration damper and clothes treatment equipment, wherein the vibration damper comprises a disc body, a swinging mass body, an end cover and a plurality of elastic bodies; the disc body is provided with a rotation center and an arc-shaped swinging chamber, the arc-shaped swinging chamber corresponds to a first circle center, and the first circle center and the rotation center are eccentrically arranged; the swinging mass body is arranged in the arc swinging chamber and can swing in an arc manner by taking the first circle center as the circle center; a plurality of elastic bodies are arranged in the arc-shaped swinging chamber; the opposite ends of the swinging mass body along the swinging direction are provided with elastic bodies; the end cap at least partially shields the arcuate swinging chamber to define a swinging mass within the arcuate swinging chamber. According to the vibration damper, vibration excitation caused by eccentricity can be resisted by generating large inertia through arrangement of small mass, the vibration noise performance is improved, the mass utilization efficiency is improved greatly, bending moment born by a power input shaft can be avoided or greatly reduced, stress conditions of the power input shaft are improved, and the service life of the power input shaft is prolonged.

Description

Vibration damper and clothes treatment equipment
Technical Field
The application relates to the technical field of vibration reduction, in particular to a vibration reduction device and clothes treatment equipment.
Background
Taking a washing machine as an example, with the improvement of the living quality of the public, the public has high attention to the performance of low vibration and low noise of the washing machine. The main aspects of the vibration of the washing machine are concentrated in the vibration of the inner barrel part, which is an important source of the vibration and noise of the whole machine.
In the related art, the manner of controlling the vibration of the tub includes a manner of adding a balance ring to the tub, referring to fig. 1, the balance ring 1' can adaptively generate a balance mass to a certain extent to offset the rotation of the eccentric mass 3' of the tub 2' so as to improve the vibration performance of the tub 2', specifically, when the eccentric mass 3' is along the lower side of fig. 1, the balance mass is concentrated toward the upper side of fig. 1, and the balance mass generates a centrifugal force f″. The balancing force f″ of the balancing ring and the eccentric force F ' of the washing drum 2' are not in the same horizontal plane, and generate a torsion moment M on the power input shaft 4', which deteriorates the vibration performance of the whole drum, and also causes the power input shaft 4' to bear a larger shearing force, resulting in a reduction in the life and reliability of the power input shaft 4', and also in deterioration of noise performance.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a vibration damping device that has a good vibration damping effect and is capable of improving the stress condition of a power input shaft.
In order to achieve the above object, an embodiment of the present application provides a vibration damping device, including a disc body, a swinging mass body, an end cover, and a plurality of elastic bodies; the disc body is provided with a rotation center and an arc-shaped swing chamber, the arc-shaped swing chamber corresponds to a first circle center, and the first circle center and the rotation center are eccentrically arranged; the swinging mass body is arranged in the arc swinging chamber and can swing in an arc manner by taking the first circle center as the circle center; a plurality of elastic bodies are arranged in the arc-shaped swinging chamber; the elastic bodies are arranged at the opposite ends of the swing mass body along the swing direction; the end cover is arranged on one side of the disc body, and at least partially shields the arc-shaped swinging chamber so as to limit the swinging mass body in the arc-shaped swinging chamber.
In some embodiments, the number of the arc-shaped swing chambers is plural, and the plurality of the arc-shaped swing chambers are uniformly arranged around the rotation center; and/or the arc-shaped swinging chamber is positioned at the edge of the tray body.
In some embodiments, the end cap encloses the arcuate swing chamber.
In some embodiments, one of the tray body and the end cap is provided with a positioning post, and the other one is provided with a positioning slot, and the positioning post is inserted into the positioning slot.
In some embodiments, the oscillating mass has a fan-like shape, and the radially inner surface and the radially outer surface of the oscillating mass are in sliding contact with the corresponding wall surface of the arcuate oscillating chamber.
In some embodiments, the oscillating mass is provided with a first bead on a radially inner surface; and/or the surface of the swinging mass body on the radial outer side is provided with a second convex rib.
In some embodiments, a gap is provided between the end cap and the oscillating mass, and the vibration damping device includes a cushion layer sandwiched in the gap to abut the oscillating mass against a corresponding bottom wall of the arcuate oscillating chamber.
In some embodiments, the elastomer is a spring, or alternatively, the elastomer is a rebound pad made of a flexible material.
In some embodiments, the tray body comprises a face tray portion, an outer rim portion, an inner ring portion, and a plurality of gusset panels; the outer edge part, the inner ring part and the rib plates are protruded out of the same side of the face plate part, the outer edge part surrounds the periphery of the face plate part, the inner ring part is arranged in the outer edge part, and the rib plates are connected between the inner side of the outer edge part and the outer side of the inner ring part so as to separate the space between the inner ring part and the outer edge part into a plurality of arc-shaped swinging chambers.
In some embodiments, the inner ring portion is formed by sequentially connecting a plurality of petal-shaped structures end to end, the rib plate is connected to the connecting position of two adjacent petal-shaped structures, the surface of the petal-shaped structure facing one side of the arc-shaped swinging chamber is an arc surface in sliding contact with the swinging mass body, and circle centers corresponding to the arc surfaces of the plurality of petal-shaped structures are located on the same circle with the rotation center as the circle center.
In some embodiments, the flap structure is provided with a first threaded hole for mating with the end cap, the outer rim portion is provided with a second threaded hole for mating with the end cap, and the plurality of first threaded holes and the plurality of second threaded holes are alternately arranged along the circumferential direction of the face disk portion.
In some embodiments, the thickness of opposite ends of the petal-shaped structure is smaller than the thickness of the middle region along the circumferential direction of the inner ring portion, and the first threaded hole is arranged in the middle region of the petal-shaped structure; and/or, along the circumferential direction of the outer edge part, the thickness of the area, which is used for sliding contact with the swinging mass body, of the outer edge part is smaller than the thickness of the area, which is used for being connected with the rib plate, of the swinging mass body, and the second threaded hole is arranged in the area, which is used for being connected with the rib plate, of the outer edge part.
In some embodiments, a plurality of positioning posts are arranged at the edge of the end cover, positioning clamping grooves are formed in the outer surface of the outer edge part, corresponding to the area where the rib plate is connected, and the positioning posts are inserted into the positioning clamping grooves.
The embodiment of the application also provides a clothes treatment device, which comprises a washing cylinder, a power input shaft and the vibration damping device of any embodiment, wherein the power input shaft is in driving connection with the washing cylinder to drive the washing cylinder to rotate; one of the washing cylinder or the power input shaft is fixedly connected with the vibration damper, and the rotation center of the disc body is positioned on the axis of the power input shaft.
In some embodiments, the disc body is sleeved on the power input shaft and is coaxially arranged with the power input shaft, and the clothes treatment device comprises a belt, and the belt is wound on the circumference of the disc body so as to drive the disc body to rotate.
The vibration damper is an inertial vibration damper system, can generate large inertia to resist vibration excitation caused by eccentricity by small mass arrangement, improves vibration noise performance, and simultaneously greatly improves mass utilization efficiency, can greatly reduce the counterweight mass of the clothes treatment equipment, even can cancel large-mass counterweight, and is convenient for capacity expansion of the clothes treatment equipment and arrangement of internal parts; in addition, because the vibration damping system of the embodiment of the application does not adopt the centrifugal force of the balancing ring adopted in the background technology of the application to realize the eccentric mass of the balance washing cylinder, the vibration damping device of the embodiment of the application can avoid or greatly reduce the bending moment in the background technology of the application, improve the stress condition of the power input shaft for driving the washing cylinder to rotate and prolong the service life of the power input shaft.
Drawings
FIG. 1 is a simplified schematic diagram of the stress condition of a washing drum in the related art during eccentric rotation;
FIG. 2 is a schematic structural view of a vibration damping device according to an embodiment of the present application;
FIG. 3 is a schematic view of the disc of FIG. 2 and a portion of the oscillating mass and elastomer;
FIG. 4 is a schematic view of the end cap of FIG. 2 from another perspective;
FIG. 5 is a schematic view of the tray shown in FIG. 3 with a portion of the structural lines omitted;
FIG. 6 is a simplified mechanical model schematic diagram of a vibration damping device according to an embodiment of the present application when an instantaneous deceleration occurs;
FIG. 7 is a simplified mechanical model schematic diagram of a vibration damping device according to an embodiment of the present application when transient acceleration occurs;
FIG. 8 is a schematic diagram illustrating a speed analysis of a non-fixed axis rotation of a disk.
Reference numerals describe the tray body 1; a drive hole 1a; an arc-shaped swing chamber 10; a first wall surface 101; a second wall 102; a third wall surface 103; a dough plate 11; an outer edge portion 12; a second screw hole 12a; a positioning card slot 12b; an inner ring portion 13; a petal-shaped structure 131; a first screw hole 13a; a gusset 14; an end cap 2; a positioning column 21; a swinging mass body 3; a first cambered surface 301; a second cambered surface 302; an elastic body 4; cushion layer 5
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and technical features in the embodiments may be combined with each other, and the detailed description in the specific embodiments should be interpreted as an explanation of the gist of the present application and should not be construed as undue limitation to the present application.
In the description of the embodiments of the present application, the terms "upper," "lower," "left," "right," orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and it should be understood that these orientation terms are merely for convenience of description of the present application and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.
The embodiment of the present application provides a vibration damping device, please refer to fig. 2, including a disc 1, a swinging mass 3, an end cover 2, and a plurality of elastic bodies 4 disposed in an arc swinging chamber 10, please refer to fig. 5, the disc 1 has a rotation center O 1 The disk body 1 rotates around a rotation center O 1 The rotation, the disk body 1 is provided with an arc swinging chamber 10, and the arc swinging chamber 10 corresponds to a first circle center O 2 First circle center O 2 With the rotation center O 1 Is eccentrically arranged. Referring to FIG. 4, for an example, a first center of circle O 2 With the rotation center O 1 The distance between the two is h, and the radius corresponding to the mean camber line of the arc-shaped swinging chamber 10 is r.
The swinging mass body 3 is arranged in an arcIn the swing chamber 10 and can be centered at a first center O 2 Arc swing is carried out for the circle center; referring to fig. 2 and 4, the oscillating mass 3 is provided with elastic bodies 4 at opposite ends in the oscillating direction, that is, the oscillating mass 3 does not strike the wall surfaces at opposite ends of the arc-shaped oscillating chamber 10, whether it oscillates to the front side in the rotating direction or to the rear side in the rotating direction.
It should be noted that the grid lines in fig. 4 are only for clearly illustrating the outline of the elastic body 4, and are not cut through the filling lines.
An end cap 2 is provided at one side of the disk body 1, and the end cap 2 at least partially shields the arc-shaped swing chamber 10 to define the swing mass body 3 within the arc-shaped swing chamber 10. That is, the end cap 2 plays a limiting role on the oscillating mass body 3, preventing the oscillating mass body 3 from being separated from the arc-shaped oscillating chamber 10.
The application field of the vibration damping device is not limited. The present application is described by taking an example in which the vibration damping device is applied to a laundry treating apparatus as an example.
The embodiment of the application also provides a clothes treatment device, which comprises a washing drum, a power input shaft, a driving motor and a vibration damping device of any embodiment of the application, wherein the power input shaft is in driving connection with the washing drum to drive the washing drum to rotate, and the motor directly or indirectly drives the power input shaft to rotate, that is, the motor provides a power source for the power input shaft. One of the washing cylinder or the power input shaft is fixedly connected with the vibration damper, the disc body 1 can synchronously rotate along with the washing cylinder, and the rotation center O of the disc body 1 1 On the axis of the power input shaft.
The clothes treating apparatus further includes an outer tub, the washing tub being rotatably disposed in the outer tub, the outer tub having a mounting supporting function for the washing tub. Specifically, one end of the power input shaft extends into the outer tub from the outside of the outer tub and is connected to the washing tub. In order to be convenient for carry out rotation support to the power input shaft, be provided with bearing and bearing frame on the power input shaft and the juncture of outer bucket, the outer fringe and the outer bucket fixed connection of bearing frame, the bearing is installed in the bearing frame, and the power input shaft wears to establish in the bearing.
The washing drum rotates to be non-fixed shaft rotation, specifically, when the washing drum does not generate eccentric rotation, the rotation axis of the washing drum is basically overlapped with the axis of the power input shaft, when the load of the washing drum is eccentric, the washing drum can generate eccentric rotation, namely, the rotation axis of the washing drum can deviate from the balance position, so that the power input shaft is driven to generate eccentric rotation, the eccentric rotation of the power input shaft can be transmitted to the outer drum through the bearing and the bearing seat, the outer drum is forced to generate regular vibration, the vibration performance of the whole drum part assembly system formed by the outer drum, the washing drum and other parts is poor, and larger noise can be generated.
The vibration damping device is described below by taking a fixed connection with the power input shaft as an example.
When the rotation center of the washing drum fluctuates, the speed fluctuation is generated by carrying the power input shaft and the disc body. Referring to FIG. 8, the rotation center O of the disk 1 at any time 1 Is delta V o I.e. the speed of the rotation center fluctuates, according to the principle of rigid body kinematics, the instantaneous speed at any position of the edge of the disk body 1 is omega, R+DeltaV oτ Wherein ω is the rotational angular velocity of the disk 1, which is the same as the rotational angular velocity of the washing drum, and also the rotational angular velocity of the power input shaft, R is the radius of the disk, deltaV oτ Is DeltaV o Tangential component at the edge of the disc 1, deltaV oτ Which may cause a fluctuation in the velocity of the edge of the disc 1. Note that Δv oτ Is a vector, ω is also a vector, when Δv oτ When the direction of (a) is the same as ω×r, Δv oτ The value of (2) is positive; when DeltaV oτ When the direction of (a) is opposite to the direction of ω R, Δv oτ The value of (2) takes the negative number. The fluctuation of the speed of the rotation center of the disk body 1 causes the fluctuation of the power input shaft, and thus, the rotation problem of the disk body 1 is a generalized torsional vibration problem.
Referring to fig. 6, in the embodiment of the present application, when the central speed of the power input shaft and the disk 1 is increased transiently due to the transient increase of the speed of the rotation center of the washing drum, the oscillating mass 3 generates a transient oscillation angle backward along the rotation direction
Figure BDA0002690047230000061
The swinging mass body 3 presses the cambered surface of the cambered swinging chamber 10 on the radial outer side under the action of centrifugal force, and the swinging mass body 3 presses the extruding force F of the cambered surface 1 Extrusion force F 1 Radially outwards of the disc 1, it is noted that the pressing force F 1 To oscillate the mass body 3 by a first centre of circle O 2 Is the centrifugal force generated by the circle center. Due to the first centre of a circle O 2 With the rotation center O 1 Eccentric, the extrusion force F 1 With force component F in tangential direction of the arc a Component F of force a It is possible to suppress an increase in the peripheral speed of the disk body 1 and thus a fluctuation in the central speed of the disk body 1, thereby in turn suppressing a fluctuation in the speed of the power input shaft to achieve an effect of weakening the vibration excitation of the outer tub, and it is understood that, when the fluctuation in the speed of the power input shaft is suppressed, the fluctuation in the speed of the rotation center of the washing tub is also suppressed well, and therefore, the eccentric rotation of the washing tub can be suppressed. Specifically, the above-described pressing force F is assumed 1 The intersection point of the straight line and the cambered surface of the cambered swing chamber 10 is C 1 Point, straight line C 1 O 2 To be at the first center of circle O 2 Straight line C with radius of circle center 1 O 1 To be about the rotation center O 1 A straight line with radius of circle center, component force F a Perpendicular to straight line C 1 O 1 。
Referring to fig. 7, when the center speed of the power input shaft, the disk body 1, is transiently reduced due to the transient reduction of the speed of the rotation center of the disk body 1, the oscillating mass 3 generates a transient oscillation angle forward in the rotation direction
Figure BDA0002690047230000062
The swinging mass body 3 presses the cambered surface of the cambered swinging chamber 10 on the radial outer side under the action of centrifugal force, and the swinging mass body 3 presses the extruding force F of the cambered surface 2 Extrusion force F 2 Radially outwards of the disc 1, it is noted that the pressing force F 2 To oscillate the mass body 3 by a first centre of circle O 2 Is the centrifugal force generated by the circle center. Due to the first centre of a circle O 2 With the rotation center O 1 Eccentric, the extrusion force F 2 With force component F in tangential direction of the arc b Component F of force b The reduction of the edge speed of the disc body 1 can be restrained, and the central speed fluctuation of the disc body 1 can be restrained, so that the rotation central speed fluctuation of the power input shaft can be restrained in turn, and the effect of weakening the vibration excitation of the outer barrel can be achieved. Specifically, the above-described pressing force F is assumed 2 The intersection point of the straight line and the cambered surface of the cambered swing chamber 10 is C 2 Point, straight line C 2 O 2 To be at the first center of circle O 2 Straight line C with radius of circle center 2 O 1 To be about the rotation center O 1 A straight line with radius of circle center, component force F b Perpendicular to straight line C 2 O 1 。
From the above, the vibration damping device according to the embodiment of the present application is an inertial vibration damping system, which is driven by component force F a Or component force F b Suppressing speed fluctuation of disk body due to component force F a Or component force F b In the tangential direction of rotation of the disc 1, therefore, the speed fluctuation of the disc 1 and thus the speed fluctuation of the power input shaft can be effectively suppressed, that is, a certain component force F can be generated even if the mass of the oscillating mass 12 is small a Or component force F b The vibration absorbing device has the advantages that the vibration absorbing device can have a good vibration absorbing effect, can generate great inertia to resist vibration excitation caused by eccentricity by small mass arrangement, improves vibration noise performance, simultaneously greatly improves mass utilization efficiency, can greatly reduce the counterweight mass of the clothes treatment equipment, even can cancel large-mass counterweight, and is convenient for capacity expansion of the clothes treatment equipment and arrangement of internal parts. It should be noted that, because the vibration damping system of the embodiment of the application does not adopt the centrifugal force of the balancing ring adopted in the background technology of the application to realize the eccentric mass of the balance washing cylinder, the vibration damping device of the embodiment of the application can avoid or greatly reduce the bending moment in the background technology of the application, improve the stress condition of the power input shaft and prolong the service life of the power input shaft.
It should be noted that, in the embodiment of the present application, the radius r corresponding to the arc-shaped swing chamber 10 is smaller than the radius of the disc body 1.
It should be noted that the material density of the oscillating mass body 3 is larger to have a larger mass at the same volume to generate a larger inertia. For example, the oscillating mass 3 is a metal piece.
In one embodiment, the arcuate oscillating chamber 10 is located at the edge of the disc 1, which enables the oscillating mass 3 to have a large oscillating radius.
The number of the arc-shaped swing chambers 10 is not limited, and may be one or a plurality.
In one embodiment, referring to FIG. 2, the number of arcuate swing chambers 10 is a plurality. A plurality of arc-shaped swing chambers 10 around a rotation center O 1 The disc body 1 is evenly arranged, so that in the rotating process of the disc body 1, eccentric mass does not exist basically, and the vibration damper has a better vibration damper effect.
Referring to fig. 3, the arc-shaped swing chamber 10 has a first wall surface 101 along a radial inner side, a second wall surface 102 along a radial outer side, and two third wall surfaces 103 along two opposite sides of a circumferential direction, wherein the first wall surface 101 and the second wall surface 102 are arc surfaces concentrically arranged, and a circle center corresponding to the first wall surface 101 and the second wall surface 102 is the first circle center O 2 。
In one embodiment, referring to fig. 3, the oscillating mass 3 has a fan shape adapted to the arcuate oscillating chamber 10. The fan-shaped swinging mass body 3 is provided with a first cambered surface 301 along the radial inner side and a second cambered surface 302 along the radial outer side, the first cambered surface 301 and the second cambered surface 302 are concentrically arranged, and the circle centers corresponding to the first cambered surface 301 and the second cambered surface 302 are the first circle center O 2 。
In one embodiment, the radially inner and radially outer surfaces of the oscillating mass 3 are in sliding contact with the corresponding wall surfaces of the arcuate oscillating chamber 10. Specifically, the first arc surface 301 of the oscillating mass body 3 is in sliding contact with the first wall surface 101 of the arc-shaped oscillating chamber 10, and the second arc surface 302 of the oscillating mass body 3 is in sliding contact with the second wall surface 102 of the arc-shaped oscillating chamber 10. That is, the oscillating mass body 3 is in clearance fit with the arc-shaped oscillating chamber 10, and the clearance tolerance is controlled within a small range, so that on the one hand, a good guiding effect on the oscillating mass body 3 is facilitated, and on the other hand, a large displacement of the oscillating mass body 3 in the radial direction is avoided, and the oscillating mass body 3 is prevented from striking the first wall surface 101 or the second wall surface 102 of the arc-shaped oscillating chamber 10 in the radial direction.
In one embodiment, the oscillating mass 3 is provided with a first bead along the radial inner side of the arcuate oscillating chamber 10. That is, the first cambered surface 301 of the oscillating mass body 3 is provided with a first bead extending in the circumferential direction of the oscillating mass body 3. The first ribs can reduce the sliding contact area between the first cambered surface 301 of the oscillating mass body 3 and the first wall surface 101 of the cambered oscillating chamber 10, so as to reduce the friction resistance when the oscillating mass body 3 oscillates.
The number of the first ribs is not limited, and one rib or two or more ribs can be used.
In one embodiment, the oscillating mass 3 is provided with a second bead radially outside the arcuate oscillating chamber 10. That is, the second cambered surface 302 of the oscillating mass body 3 is provided with the second bead extending in the circumferential direction of the oscillating mass body 3. The second ribs can reduce the sliding contact area between the second cambered surface 302 of the swinging mass body 3 and the second wall surface 102 of the cambered swinging chamber 10, so as to reduce the friction resistance when the swinging mass body 3 swings.
The number of the second ribs is not limited, and one rib or two or more ribs can be used.
It should be noted that, in some embodiments, only the first ribs may be disposed on the oscillating mass body 3; in other embodiments, the oscillating mass 3 may be provided with only the second ribs described above; in other embodiments, the first rib and the second rib may be disposed on the oscillating mass body 3 at the same time.
In one embodiment, along the rotation axis direction of the disc body 1, a gap is formed between the end cover 2 and the swinging mass body 3, and the vibration damping device comprises a cushion layer 5, wherein the cushion layer 5 is clamped in the gap so as to abut the swinging mass body 3 against the bottom wall corresponding to the arc-shaped swinging chamber 10. The cushion layer 5 can reduce the tolerance requirements for the design and manufacture of the vibration damping device, in particular, the size of the oscillating mass 3 in the direction of the rotational axis of the disc 1 is smaller than the size of the arc-shaped oscillating chamber 10, whereby the resulting tolerance can be compensated for by the cushion layer 5. The cushion layer 5 prevents the oscillating mass body 3 from moving in the direction of the rotational axis of the disk body 1, and also enables the oscillating mass body 3 to oscillate in the circumferential direction of the arc-shaped oscillation chamber 10.
The material of the cushion layer 5 is not limited, and a material having a relatively small friction coefficient with the oscillating mass body 3 may be selected, and a certain compression amount is required, for example, felt, flannelette, textile, or the like.
In one embodiment, the shape of the cushion layer 5 is adapted to the shape of the oscillating mass 3, so as to form a relatively uniform abutment force on the oscillating mass 3. In the embodiment in which the number of the arc-shaped swinging chambers 10 and the swinging mass bodies 3 is plural, the number of the cushion layers 5 is plural, and one cushion layer 5 is provided for each swinging mass body 3.
In order to reduce the assembly time on the assembly line, the cushion layer 5 may be bonded to the end cap 2 prior to assembly by bonding or the like. When the assembly line is assembled, the end cover 2 is directly connected with the tray body 1, and after the end cover 2 is aligned with the tray body 1, the cushion layer 5 is aligned with the swinging mass body 3.
The elastic body 4 is capable of generating compression elastic deformation upon impact of the oscillating mass 3, and has a rebound force to drive the oscillating mass 3 to return. The elastic body 4 may be a spring, a rebound pad made of a flexible material, or the like. In the embodiment in which the elastic body 4 is a rebound pad, impact noise is not generated in the process of impacting the rebound pad by the swinging mass body 3, and the noise reduction effect is good. Wherein the flexible material includes but is not limited to: rubber, silica gel, porous foam, and the like.
In the embodiment in which the elastic body 4 is a rebound cushion, a buffer space is provided between the end surface of the oscillating mass body 3 in the circumferential direction and the wall surface corresponding to the arc-shaped oscillating chamber 10, and the rebound cushion occupies the buffer space. Thus, a better cushioning effect can be provided for the oscillating mass body 3, and a large impact can be prevented from being generated by the oscillating mass body 3. It will be appreciated that in this embodiment the rebound pads need to have a large elastic deformation when the oscillating mass 3 oscillates.
In some embodiments, grease may be injected into the arc-shaped swing chamber 10, where the grease may reduce a friction coefficient between the swing mass body 3 and a wall surface of the arc-shaped swing chamber 10, thereby further reducing a friction resistance when the swing mass body 3 swings.
In one embodiment, the end cap 2 encloses an arcuate swing chamber 10. That is, the oscillating mass 3 is sealed in the arc-shaped oscillating chamber 10. On the one hand, dust and impurities are prevented from entering the arc-shaped swing chamber 10, and on the other hand, when grease is added into the arc-shaped swing chamber 10, the sealed arc-shaped swing chamber 10 can prevent the grease from overflowing out of the arc-shaped swing chamber 10.
In one embodiment, one of the tray 1 and the end cap 2 is provided with a positioning post 21, the other of which is provided with a positioning slot 12b, and the positioning post 21 is inserted into the positioning slot 12 b. In the assembly process, after the positioning column 21 and the positioning clamping groove 12b are aligned, the positioning column 21 is inserted into the positioning clamping groove 12b, at this time, the end cover 2 and the disc body 1 are positioned at the correct assembly position, repeated alignment of operators is not needed, and then the end cover 2 and the disc body 1 are fixedly connected.
The cross-sectional shape of the positioning column 21 is not limited, and may be, for example, circular, elliptical, polygonal, or the like, and is not limited herein. Illustratively, in the present embodiment, the positioning posts 21 are lamellar,
the specific structural form of the tray body 1 is not limited. Illustratively, in one embodiment, the tray body 1 includes a face tray portion 11, an outer edge portion 12, an inner ring portion 13, and a plurality of rib plates 14; the outer rim 12, the inner ring 13 and the plurality of rib plates 14 are protruded on the same side of the face plate 11, the outer rim 12 surrounds the periphery of the face plate 11, the inner ring 13 is arranged in the outer rim 12, an annular area is formed between the outer rim 12 and the inner ring 13, and the plurality of rib plates 14 are connected between the inner side of the outer rim 12 and the outer side of the inner ring 13 so as to separate the space between the inner ring 13 and the outer rim 12 into a plurality of arc-shaped swing chambers 10, that is, the annular area is separated into a plurality of arc-shaped swing chambers 10.
The outline of the face plate 11 is substantially circular, a driving hole 1a is provided in the center of the face plate 11, and a power input shaft is inserted into the driving hole 1 a. The driving hole 1a can be a non-circular hole, and part of the power input shaft can be in a flat shaft shape, so that the driving connection of the disc body 1 and the power input shaft can be realized without adopting a matching mode of a key and a key groove.
In one embodiment, the plurality of rib plates 14 are radially distributed centering on the rotation center O. In one embodiment, the rib plates 14 extend along the radial direction of the disc body 1, so that each arc-shaped swinging chamber 10, the swinging mass body 1 and the elastic body 4 arranged in the arc-shaped swinging chamber are in a substantially symmetrical structure, and the swinging stress condition of the swinging mass body 1 along any side of the circumferential direction is equivalent.
In an embodiment, the inner ring portion 13 is formed by sequentially connecting a plurality of petal-shaped structures 131 end to end, the rib plates 14 are connected to the connection parts of two adjacent petal-shaped structures 131, that is, the connection parts of two adjacent petal-shaped structures 131 are respectively provided with the rib plates 14, the surface of the petal-shaped structure 131 facing the side of the arc-shaped swinging chamber 10 is an arc surface in sliding contact with the swinging mass body 3, namely the first wall surface 101, and the circle center corresponding to the arc surface of each petal-shaped structure 131 is a first circle center O 2 The circle centers corresponding to the arc surfaces of the plurality of petal-shaped structures 131 are positioned at the rotation center O 1 On the same circle as the centre of a circle, i.e. a plurality of first centres of a circle O 2 Located at the rotation center O 1 The same circle is used as the center of the circle.
In one embodiment, the petal-shaped structure 131 is provided with a first threaded hole 13a for matching with the end cover 2, and a screw penetrates through the end cover 2 and is screwed into the first threaded hole 13a, so that the end cover 2 and the disc body 1 can be fixedly connected.
In one embodiment, the outer edge 12 is provided with a second threaded hole 12a for matching with the end cover 2, and a screw passes through the end cover 2 and is screwed into the second threaded hole 12a, so that the end cover 2 and the disk 1 can be fixedly connected.
In one embodiment, the plurality of first screw holes 13a and the plurality of second screw holes 12a are alternately arranged along the circumferential direction of the face plate portion 11. The alternating arrangement of the plurality of first screw holes 13a and the plurality of second screw holes 12a means that the rotation center O is used 1 The face plate 11 is divided into a plurality of sectors as the center of a circle, and one sector is provided with a first threaded hole 13a and the other sector is provided with a second threaded hole 12a in two adjacent sectors. In this embodiment, a first threaded bore 13a and the second threaded holes 12a are alternately arranged, so that the stress of the end cover 2 in the radial direction and the circumferential direction can be more uniform.
In one embodiment, the thickness of the opposite ends of the petal-shaped structures 131 is smaller than that of the middle region along the circumferential direction of the inner ring portion 13, and the first screw holes 13a are provided in the middle region of the petal-shaped structures 131. In this embodiment, the petal-shaped structure 131 not only facilitates the formation of the first cambered surface 301, but also makes full use of the structural characteristics of the petal-shaped structure 131 to mount the screw, thereby ensuring better connection reliability.
In one embodiment, the thickness of the area of the outer edge 12 for sliding contact with the oscillating mass 3 is smaller than the thickness of the area for connection with the rib 14 along the circumferential direction of the outer edge 12, and the second screw hole 12a is provided in the area of the outer edge 12 for connection with the rib 14. In this embodiment, the arc-shaped swinging chamber 10 can be made to be as close to the edge of the face plate 11 as possible, so that the swinging mass body 3 has a swinging radius as large as possible, and the structural characteristics of the outer edge 12 can be fully utilized to mount the screw, thereby ensuring good connection reliability.
In one embodiment, a plurality of positioning posts 21 are disposed at the edge of the end cover 2, and a positioning slot 12b is disposed on the outer surface of the outer edge 12 corresponding to the area where the rib plate 14 is connected, and the positioning posts 21 are inserted into the positioning slot 12 b. In this embodiment, the positioning slot 12b is an open slot, so that the space occupied by the positioning slot 12b can be reduced, which is beneficial to compact structure of the disc 1. In addition, since the positioning column 21 is not substantially subjected to the acting force, the positioning column 21 may have a sheet-like structure, so that the space occupied by the positioning column 21 along the radial direction of the disc body 1 can be reduced, which is beneficial to compact structure of the disc body 1.
The tray body 1 of the embodiment of the present application may be an integrally molded structure, for example, molded by forging, machining, or the like. The tray body 1 may be formed by fixedly connecting a plurality of split parts by welding or the like.
The specific structural form of the end cover 2 is not limited, and in an exemplary embodiment, the end cover 2 is in a shape of a circular ring sheet, and the power input shaft passes through the middle of the end cover 2. The end cap 2 is only required to be able to close all the arc-shaped swing chambers 10.
In one embodiment, the disc body 1 is sleeved on the power input shaft and is coaxially arranged with the power input shaft, and the clothes treatment device comprises a belt which is wound on the circumference of the disc body 1 to drive the disc body to rotate. In this embodiment, the disc body 1 may be used as a pulley, that is, the structural design of the pulley in the prior art may be changed, that is, the structural form of the disc body 1 in the embodiment of the present application may be applied to the pulley design in the prior art, so that the vibration damper may be prevented from occupying additional installation space in the laundry treatment apparatus, and the structure is compact, and the layout of the components in the existing laundry treatment apparatus is not affected.
In one embodiment, the relevant design parameters of the damping device and the wash bowl satisfy the constraints of the following two formulas:
mh(r+h) 2 ＝J o (r-h) formula (1)
Figure BDA0002690047230000131
Wherein m is the mass of the oscillating mass; j (J) 0 The rotary integral common moment of inertia is formed by the washing cylinder, the power input shaft and the disk body; gamma is the excitation frequency order to be considered for cancellation; h is the distance between the swing center of the swing mass body and the rotation center; r is the swing length, namely the swing radius of the swing mass body and the radius of the arc-shaped swing chamber.
In the embodiment, the vibration device can inhibit the vibration displacement of the full rotating speed section of the washing barrel, and has a wider vibration absorption frequency band, so that the whole vibration absorption frequency band of the full rotating speed section of the washing barrel can play a good role in vibration absorption and does not generate resonance.
The specific type of the laundry treatment apparatus of the embodiment of the present application is not limited, and may be, for example, a pulsator type laundry treatment apparatus, and may be a drum type laundry treatment apparatus, for example, a drum washing machine, a drum washing and drying integrated machine, a drum dryer, and the like.
The washing drum may be a perforated drum or a non-perforated drum. When the washing drum is a perforated inner drum, the clothes treatment device is provided with an outer drum, and the washing drum is rotationally arranged in the outer drum and is used for containing water by virtue of the outer drum; when the washing drum is a hole-free inner drum, the washing drum itself is used for containing water, that is, the washing drum can contain both water and clothes, and in this embodiment, the clothes treating apparatus may or may not be provided with an outer drum.
The various embodiments/implementations provided herein may be combined with one another without conflict.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (14)

1. A vibration damping device for a laundry treatment apparatus, the laundry treatment apparatus comprising a washing tub and a power input shaft, one of the washing tub and the power input shaft being fixedly connected with the vibration damping device, the vibration damping device comprising:
the washing machine comprises a washing barrel, a washing machine body and a power input shaft, wherein the washing barrel is arranged on the washing machine body, the washing machine body (1) is provided with a rotation center and an arc-shaped swing chamber (10), the arc-shaped swing chamber (10) corresponds to a first circle center, the first circle center and the rotation center are eccentrically arranged, the washing machine body synchronously rotates along with the washing barrel, and the rotation center is located on the axis of the power input shaft;
the swinging mass body (3), the swinging mass body (3) is in a fan ring shape, and the swinging mass body (3) is arranged in the arc swinging chamber (10) and can swing in an arc manner by taking the first circle center as the circle center;
a plurality of elastic bodies (4) arranged in the arc-shaped swinging chamber (10); the elastic bodies (4) are arranged at the opposite ends of the swinging mass body (3) along the swinging direction;
an end cover (2), wherein the end cover (2) is arranged on one side of the disc body (1), and the end cover (2) at least partially shields the arc-shaped swinging chamber (10) so as to limit the swinging mass body (3) in the arc-shaped swinging chamber (10);
wherein, the surface of the swinging mass body (3) along the radial inner side and the surface of the swinging mass body along the radial outer side are in sliding contact with the wall surface corresponding to the arc swinging chamber (10).
2. Damping device according to claim 1, characterized in that the number of the arc-shaped swing chambers (10) is plural, the plurality of arc-shaped swing chambers (10) being arranged uniformly around the rotation center; and/or the arc-shaped swinging chamber (10) is positioned at the edge of the tray body (1).
3. Damping device according to claim 1, characterized in that the end cap (2) closes the arc-shaped oscillation chamber (10).
4. Damping device according to claim 1, characterized in that one of the tray body (1) and the end cap (2) is provided with a positioning post (21), wherein the other is provided with a positioning slot (12 b), the positioning post (21) being inserted into the positioning slot (12 b).
5. Damping device according to claim 1, characterized in that the oscillating mass (3) is provided with a first bead along a radially inner surface; and/or the surface of the swinging mass body (3) on the radial outer side is provided with a second convex rib.
6. Damping device according to claim 1, characterized in that a gap is provided between the end cap (2) and the oscillating mass (3), the damping device comprising a cushion layer (5), the cushion layer (5) being clamped in the gap to abut the oscillating mass (3) against the corresponding bottom wall of the arc-shaped oscillating chamber (10).
7. Damping device according to claim 6, characterized in that the elastomer (4) is a spring or that the elastomer (4) is a rebound cushion made of a flexible material.
8. The vibration damping device according to claim 1, characterized in that the disc (1) comprises a face disc portion (11), an outer rim portion (12), an inner ring portion (13), and a plurality of webs (14); the outer edge part (12), the inner ring part (13) and a plurality of rib plates (14) are protruded out of the same side of the face plate part (11), the outer edge part (12) surrounds the periphery of the face plate part (11), the inner ring part (13) is arranged in the outer edge part (12), and the rib plates (14) are connected between the inner side of the outer edge part (12) and the outer side of the inner ring part (13) so as to separate a plurality of arc-shaped swinging chambers (10) from the space between the inner ring part (13) and the outer edge part (12).
9. The vibration damper according to claim 8, wherein the inner ring portion (13) is formed by sequentially connecting a plurality of petal-shaped structures (131) end to end, the rib plates (14) are connected to the connecting portions of two adjacent petal-shaped structures (131), the surfaces of the petal-shaped structures (131) facing the side of the arc-shaped swinging chamber (10) are arc-shaped surfaces in sliding contact with the swinging mass body (3), and circle centers corresponding to the arc-shaped surfaces of the plurality of petal-shaped structures (131) are located on the same circle with the rotation center as the circle center.
10. Damping device according to claim 9, characterized in that the flap-shaped structure (131) is provided with a first threaded hole (13 a) for cooperation with the end cap (2), the outer rim portion (12) is provided with a second threaded hole (12 a) for cooperation with the end cap (2), and in that a plurality of the first threaded holes (13 a) and a plurality of the second threaded holes (12 a) are alternately arranged in the circumferential direction of the face plate portion (11).
11. The vibration damping device according to claim 10, characterized in that the thickness of the opposite ends of the petal-shaped structure (131) is smaller than the thickness of the intermediate region in the circumferential direction of the inner ring portion (13), and the first screw hole (13 a) is provided in the intermediate region of the petal-shaped structure (131); and/or, along the circumferential direction of the outer edge part (12), the thickness of the sliding contact area of the outer edge part (12) for the swinging mass body (3) is smaller than the thickness of the area for connecting with the rib plate (14), and the second threaded hole (12 a) is arranged in the area of the outer edge part (12) for connecting with the rib plate (14).
12. Damping device according to claim 9, characterized in that a plurality of positioning posts (21) are provided at the edge of the end cap (2), the outer edge (12) being provided with positioning detents (12 b) for the outer surface corresponding to the area of connection with the web (14), the positioning posts (21) being inserted into the positioning detents (12 b).
13. A laundry treatment apparatus, comprising:
a washing drum;
the power input shaft is in driving connection with the washing cylinder to drive the washing cylinder to rotate;
the vibration damping device according to any one of claims 1-12, wherein one of the washing drum or the power input shaft is fixedly connected to the vibration damping device, and the rotation center of the disc body (1) is located on the axis of the power input shaft.
14. Laundry treatment apparatus according to claim 13, characterized in that the disc (1) is sleeved on the power input shaft and coaxially arranged with the power input shaft, the laundry treatment apparatus comprising a belt which is wound around the circumference of the disc (1) to drive the disc (1) to rotate.
CN202010988541.5A 2020-09-18 2020-09-18 Vibration damper and clothes treatment equipment Active CN114197164B (en)

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