CN114197164A - Vibration damper and clothes treatment equipment - Google Patents

Vibration damper and clothes treatment equipment Download PDF

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Publication number
CN114197164A
CN114197164A CN202010988541.5A CN202010988541A CN114197164A CN 114197164 A CN114197164 A CN 114197164A CN 202010988541 A CN202010988541 A CN 202010988541A CN 114197164 A CN114197164 A CN 114197164A
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China
Prior art keywords
arc
swinging
shaped
damping device
chamber
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Granted
Application number
CN202010988541.5A
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Chinese (zh)
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CN114197164B (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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Publication of CN114197164B publication Critical patent/CN114197164B/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 damping device and clothes treatment equipment, wherein the vibration damping device comprises a disc body, a swinging mass body, an end cover and a plurality of elastic bodies; the disk body is provided with a rotating 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 rotating center are eccentrically arranged; the swinging mass body is arranged in the arc swinging chamber and can do arc swinging by taking the first circle center as the circle center; a plurality of elastic bodies are arranged in the arc-shaped swinging chamber; elastic bodies are arranged at the two opposite ends of the swinging mass body along the swinging direction; the end cap at least partially shields the arcuate swing chamber to confine the swing mass within the arcuate swing chamber. The vibration damping device of the embodiment of the application can arrange to produce the vibration excitation that the large inertia leads to resisting off-centre with very little quality, promotes the vibration noise performance and improves the quality utilization efficiency simultaneously greatly, also can avoid or greatly reduce the moment of flexure that power input shaft bore, improves the atress condition of power input shaft, promotes the life of power input shaft.

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 quality of life of the public, the public has a higher attention to the low vibration and low noise performance of the washing machine. The main aspect of the washing machine vibration is concentrated on the vibration arranged at 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 washing tub and balance ring manner, referring to fig. 1, the balance ring 1 ' can adaptively generate balance mass to some extent to offset the rotating eccentric mass 3 ' of the washing tub 2 ' so as to improve the vibration performance of the washing tub 2 ', and specifically, when the eccentric mass 3 ' is along the lower side of fig. 1, the balance mass is concentrated to the upper side of fig. 1, and the balance mass generates a centrifugal force F ″. The balance force F 'of the balance ring and the eccentric force F' of the washing drum 2 'are not in the same horizontal plane, and the balance force F' and the eccentric force F 'generate a torsional moment M to the power input shaft 4', the torsional moment M enables the vibration performance of the whole barrel to be poor, the power input shaft 4 'can be subjected to a large shearing force, the service life and the reliability of the power input shaft 4' are reduced, and the noise performance is also poor.
Disclosure of Invention
In view of the above, it is desirable to provide a vibration damping device having a better vibration damping effect and capable of improving the stress condition of the power input shaft.
In order to achieve the above object, an embodiment of the present application provides a vibration damping device, including a disk body, a swinging mass body, an end cover, and a plurality of elastic bodies; the disc body is provided with a rotating 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 rotating center are eccentrically arranged; the swinging mass body is arranged in the arc swinging chamber and can do arc swinging by taking the first circle center as a circle center; a plurality of elastic bodies are arranged in the arc-shaped swinging chamber; the elastic bodies are arranged at the two opposite ends of the swinging mass body along the swinging direction; the end cover is arranged on one side of the disc body, and at least part of the end cover shields the arc-shaped swinging chamber so as to limit the swinging mass body in the arc-shaped swinging chamber.
In some embodiments, there is a plurality of said arcuate swing chambers, said plurality of said arcuate swing chambers being evenly arranged around said center of rotation; and/or the arc-shaped swinging chamber is positioned at the edge of the disc body.
In some embodiments, the end cap encloses the arcuate oscillating chamber.
In some embodiments, one of the tray body and the end cap is provided with a positioning column, and the other is provided with a positioning clamping groove, and the positioning column is inserted into the positioning clamping groove.
In some embodiments, the oscillating mass has a fan-ring shape, and a radially inner surface and a radially outer surface of the oscillating mass are in sliding contact with corresponding wall surfaces of the arc-shaped oscillating chamber.
In some embodiments, a radially inner surface of the oscillating mass is provided with a first rib; and/or a second convex rib is arranged on the surface of the swinging mass body along the radial outer side.
In some embodiments, a gap is formed between the end cap and the oscillating mass, and the vibration damping device includes a cushion layer interposed in the gap to abut the oscillating mass against a corresponding bottom wall of the arc-shaped oscillating chamber.
In some embodiments, the elastic body is a spring, or the elastic body is a resilient pad made of a flexible material.
In some embodiments, the tray body comprises a faceplate portion, an outer rim portion, an inner ring portion, and a plurality of webs; the outer edge portion, the inner ring portion and the plurality of rib plates protrude out of the same side of the face plate portion, the outer edge portion surrounds the periphery of the face plate portion, the inner ring portion is arranged in the outer edge portion, and the plurality of rib plates are connected between the inner side of the outer edge portion and the outer side of the inner ring portion so as to divide a space between the inner ring portion and the outer edge portion into a plurality of arc-shaped swing 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 a joint of two adjacent petal-shaped structures, a surface of one side of each petal-shaped structure facing 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 using the rotation center as the circle center.
In some embodiments, the petal structure is provided with first threaded holes for fitting with the end cap, the outer rim portion is provided with second threaded holes for fitting with the end cap, and a plurality of the first threaded holes and a plurality of the second threaded holes are alternately arranged along a circumferential direction of the panel portion.
In some embodiments, the thickness of the opposite ends of the petal-shaped structure is smaller than that of the middle region along the circumferential direction of the inner ring part, and the first threaded hole is arranged in the middle region of the petal-shaped structure; and/or the thickness of the sliding contact area of the outer edge part and the swing mass body is smaller than that of the area used for being connected with the rib plate along the circumferential direction of the outer edge part, and the second threaded hole is formed in the area of the outer edge part used for being connected with the rib plate.
In some embodiments, a plurality of positioning columns are arranged at the edge of the end cover, positioning clamping grooves are arranged on the outer surface of the outer edge portion corresponding to the region connected with the rib plate, and the positioning columns are inserted into the positioning clamping grooves.
The embodiment of the application also provides clothes treatment equipment which comprises a washing drum, a power input shaft and the vibration damper of any one of the embodiments, wherein the power input shaft is in driving connection with the washing drum so as to drive the washing drum to rotate; one of the washing drum or the power input shaft is fixedly connected with the vibration damping device, and the rotation center of the disc body is positioned on the axis of the power input shaft.
In some embodiments, the tray 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 which is wound around the circumferential direction of the tray body to drive the tray body to rotate.
The vibration damping device is an inertia vibration damping system, can generate large inertia by small mass arrangement to resist vibration excitation caused by eccentricity, improves the performance of vibration noise and greatly improves the utilization efficiency of mass at the same time, can greatly reduce the counterweight mass of the clothes treatment equipment and even cancel a large mass counterweight, and is convenient for the capacity expansion of the clothes treatment equipment and the arrangement of internal parts; in addition, because the damping system of this application embodiment does not adopt the eccentric mass that the centrifugal force of the equalizer ring that adopts in this application background art realized balanced washing section of thick bamboo, consequently, the damping device of this application embodiment can avoid or greatly reduce the moment of flexure in this application background art, improves the atress condition of drive washing section of thick bamboo pivoted power input shaft, promotes the life of power input shaft.
Drawings
FIG. 1 is a simplified diagram illustrating a force applied to a washing drum during eccentric rotation in the related art;
FIG. 2 is a schematic structural diagram of a damping device according to an embodiment of the present application;
FIG. 3 is a schematic view of the disc and portions of the oscillating mass and elastomer of FIG. 2;
FIG. 4 is a schematic view of FIG. 2 from another perspective with the end cap omitted;
FIG. 5 is a schematic view of the tray body shown in FIG. 3 with structural lines omitted;
FIG. 6 is a simplified mechanical model of a damping device according to an embodiment of the present application during transient deceleration;
FIG. 7 is a simplified mechanical model of a damping device according to an embodiment of the present application during transient acceleration;
FIG. 8 is a schematic diagram of a velocity analysis of disk non-fixed axis rotation.
The reference numbers indicate the tray body 1; a drive hole 1 a; an arc-shaped swinging chamber 10; a first wall 101; a second wall 102; a third wall 103; a faceplate portion 11; an outer edge portion 12; a second threaded hole 12 a; a positioning card slot 12 b; an inner ring portion 13; a petal-shaped structure 131; a first threaded hole 13 a; a rib plate 14; an end cap 2; a positioning post 21; a swinging mass body 3; a first arc surface 301; second arc 302; an elastic body 4; cushion layer 5
Detailed Description
It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.
In the description of the embodiments of the present application, "upper", "lower", "left", "right", orientation or positional relationship is an orientation or positional relationship shown based on the drawings, it being understood that these orientation terms are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus should not be construed as limiting the present application.
An embodiment of the present application provides a vibration damping device, please refer to fig. 2, including a disk body 1, a swinging mass body 3, an end cover 2, and a plurality of elastic bodies 4 disposed in an arc swinging chamber 10, please refer to fig. 5, in which the disk body 1 has a rotation center O1The disk body 1 rotates around a rotation center O1The disk body 1 is provided with an arc-shaped swinging chamber 10, and the arc-shaped swinging chamber 10 corresponds to a first circle center O2First center of a circle O2And the center of rotation O1The eccentric arrangement. Exemplarily, please refer to fig. 4, the first circle center O2And the center of rotation O1The distance between the arc-shaped swing chambers is h, and the radius corresponding to the camber line of the arc-shaped swing chamber 10 is r.
The swinging mass body 3 is arranged in the arc swinging chamber 10 and can rotate around a first circle center O2Performing circular arc swing as the center of a circle; referring to fig. 2 and 4, the elastic bodies 4 are disposed at the opposite ends of the swinging mass body 3 along the swinging direction, that is, the swinging mass body 3 does not collide with the wall surfaces at the opposite ends of the arc-shaped swinging chamber 10 no matter swinging to the front side of the rotating direction or swinging to the rear side of 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 out of the filling lines.
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. That is, the end cap 2 acts as a limit to the oscillating mass 3, preventing the oscillating mass 3 from coming out of the arc-shaped oscillating chamber 10.
The application field of the vibration damping device of the embodiment of the application is not limited. Illustratively, the present application describes the application of the vibration damping device to the laundry treating apparatus as an example.
This application is trueEmbodiments also provide a clothes treating apparatus, including a washing drum, a power input shaft, a driving motor, and the vibration damping device of any embodiment of the present 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 drum or the power input shaft is fixedly connected with the vibration damper, the disc body 1 can synchronously rotate along with the washing drum, and the rotation center O of the disc body 11On the axis of the power input shaft.
It should be noted that the laundry treating apparatus further includes an outer tub, the washing drum is rotatably disposed in the outer tub, and the outer tub plays a role in mounting and supporting the washing drum. Specifically, one end of the power input shaft extends into the outer tub from the outer side of the outer tub and is connected with the washing tub. In order to facilitate the rotation support of the power input shaft, a bearing and a bearing seat are arranged at the junction of the power input shaft and the outer barrel, the outer edge of the bearing seat is fixedly connected with the outer barrel, the bearing is arranged in the bearing seat, and the power input shaft is arranged in the bearing in a penetrating manner.
The washing drum is rotated 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 superposed 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 a balance position, so that the power input shaft can be 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 of the outer drum can cause the vibration performance of the whole drum assembly system formed by the outer drum, the washing drum and other parts to be poor, and larger noise can be generated.
The following description will be given taking as an example the case where the vibration damping device is fixedly connected to the power input shaft.
When the rotation center of the washing drum generates speed fluctuation, the speed fluctuation is also generated by the power input shaft and the disc body. Referring to fig. 8, the rotation center O of the plate 1 at any time1Is increased by Δ VoI.e. the speed of the centre of rotation, fluctuates, according to the rigid body kinematics principle,the instantaneous speed at any position of the edge of the disk body 1 is omega R + delta VoτWhere ω is the rotational angular velocity of the tray body 1, which is the same as the rotational angular velocity of the washing tub and also the rotational angular velocity of the power input shaft, R is the radius of the tray body, Δ VoτIs DeltaVoTangential component at the edge of the disk 1, Δ VoτWhich results in speed fluctuations at the edge of the disc 1. Note that Δ VoτIs a vector, ω R is also a vector, when Δ VoτIn the same direction as ω R, Δ VoτTaking a positive number as the value of (A); when Δ VoτWhen the direction of (d) is opposite to the direction of ω R, Δ VoτThe value of (A) is negative. The speed fluctuation of the rotation center of the disk body 1 causes the fluctuation of the power input shaft, and therefore, 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 speed of the power input shaft and the central speed of the disc 1 are 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 swing angle backward in the rotation direction
Figure BDA0002690047230000061
The swinging mass body 3 extrudes the cambered surface of the arc swinging chamber 10 along the radial outer side under the action of centrifugal force, and the extrusion force F of the swinging mass body 3 to the cambered surface1Extruding force F1Radially outwards of the disk 1, it should be noted that this pressing force F is1For swinging the mass body 3 about a first center O2The centrifugal force generated by the center of a circle. Due to the first circle center O2And the center of rotation O1Eccentricity of the pressing force F1With force component F tangential to the curved surfaceaComponent force FaIt is possible to suppress the increase of the peripheral speed of the tray body 1 and further suppress the central speed fluctuation of the tray body 1, thereby in turn suppressing the speed fluctuation of the power input shaft to achieve the effect of attenuating the vibration excitation of the outer tub, and it is understood that the speed fluctuation of the rotation center of the washing tub is also suppressed well when the speed fluctuation of the power input shaft is suppressed, and therefore, the eccentric rotation of the washing tub can be suppressed. Specifically, assume the above-described pressing force F1In a straight line and an arc pendulumThe intersection point of the arc surfaces of the moving chamber 10 is C1Point, straight line C1O2Is centered at a first circle center O2Straight line with radius as center of circle, straight line C1O1To rotate about a rotation center O1Radius of the circle center is on the straight line, component force FaPerpendicular to the straight line C1O1。
Referring to fig. 7, when the speed of the power input shaft and the central speed of the disk body 1 are transiently decreased due to the transient decrease of the speed of the rotation center of the disk body 1, the oscillating mass body 3 generates a transient pivot angle forward in the rotation direction
Figure BDA0002690047230000062
The swinging mass body 3 extrudes the cambered surface of the arc swinging chamber 10 along the radial outer side under the action of centrifugal force, and the extrusion force F of the swinging mass body 3 to the cambered surface2Extruding force F2Radially outwards of the disk 1, it should be noted that this pressing force F is2For swinging the mass body 3 about a first center O2The centrifugal force generated by the center of a circle. Due to the first circle center O2And the center of rotation O1Eccentricity of the pressing force F2With force component F tangential to the curved surfacebComponent force FbThe reduction of the edge speed of the disc body 1 can be restrained, and further the central speed fluctuation of the disc body 1 is restrained, so that the rotation central speed fluctuation of the power input shaft is restrained in turn, and the effect of weakening the vibration excitation of the outer barrel is achieved. Specifically, assume the above-described pressing force F2The intersection point of the straight line and the cambered surface of the cambered swinging chamber 10 is C2Point, straight line C2O2Is centered at a first circle center O2Straight line with radius as center of circle, straight line C2O1To rotate about a rotation center O1Radius of the circle center is on the straight line, component force FbPerpendicular to the straight line C2O1。
From the above, the damping device of the embodiment of the present application is an inertial damping system, and passes through the component force FaOr component force FbDamping speed fluctuations of the disc due to component FaOr component force FbAlong the tangential direction of rotation of the disk body 1, so that the speed fluctuation of the disk body 1 can be effectively suppressed, and furtherSuppression of speed fluctuations of the power input shaft, i.e. generation of a certain force component F even if the mass of the oscillating mass body 12 is smallaOr component force FbThe vibration absorption device can also play a good vibration absorption effect, can generate great inertia to resist vibration excitation caused by eccentricity by very small mass arrangement, improves the performance of vibration noise, greatly improves the utilization efficiency of mass, can greatly reduce the counterweight mass of the clothes treatment equipment, even can cancel a large-mass counterweight, and is convenient for the capacity expansion of the clothes treatment equipment and the arrangement of internal parts. It should be noted that, because the vibration damping system of the embodiment of the present application does not adopt the centrifugal force of the balance ring adopted in the background art of the present application to realize the balance of the eccentric mass of the washing drum, the vibration damping device of the embodiment of the present application can avoid or greatly reduce the bending moment in the background art of the present 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 of the arc-shaped swinging 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 greater to have a greater mass at the same volume to generate a greater inertia. The oscillating mass body 3 is, for example, a metal piece.
In one embodiment, the arc-shaped oscillating chamber 10 is located at the edge of the disk 1, which enables the oscillating mass 3 to have a large oscillating radius.
The number of the arc-shaped swinging chambers 10 is not limited, and may be one or more.
For example, in one embodiment, referring to fig. 2, the number of the arc-shaped swinging chambers 10 is plural. A plurality of arc-shaped swinging chambers 10 around a rotation center O1Evenly arrange, so, 1 rotation in-process of disk body, disk body 1 does not have eccentric quality basically, can make damping device have better damping effect.
Referring to fig. 3, the arc-shaped swinging chamber 10 has a first wall surface 101 along the radial inner side, a second wall surface 102 along the radial outer side, and two third wall surfaces 103 along the opposite two sides of the circumferential direction, wherein the first wall surface 101 and the second wall surface 102 are arc-shaped walls concentrically arrangedA center of a circle corresponding to the first wall surface 101 and the second wall surface 102 is the first center O2。
In one embodiment, with continued reference to fig. 3, the oscillating mass 3 is in the shape of a sector ring adapted to the arc-shaped oscillating chamber 10. The sector-ring-shaped swinging mass body 3 has 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 corresponding circle centers of the first cambered surface 301 and the second cambered surface 302 are the first circle center O2。
In one embodiment, the radially inner surface and the radially outer surface of the oscillating mass body 3 are in sliding contact with the corresponding wall surfaces of the arc-shaped 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 and the arc-shaped oscillating chamber 10 are in clearance fit, and the clearance tolerance is controlled within a small range, so that on one hand, the oscillating mass body 3 is guided well, on the other hand, the oscillating mass body 3 is prevented from generating large displacement along the radial direction, and the oscillating mass body 3 is prevented from impacting the first wall surface 101 or the second wall surface 102 of the arc-shaped oscillating chamber 10 along the radial direction.
In one embodiment, the oscillating mass 3 is provided with a first rib along the radially inner side of the arc-shaped oscillating chamber 10. That is, the first cambered surface 301 of the oscillating mass body 3 is provided with a first rib extending in the circumferential direction of the oscillating mass body 3. The first rib can reduce the sliding contact area between the first arc surface 301 of the oscillating mass body 3 and the first wall surface 101 of the arc-shaped oscillating chamber 10 to reduce the frictional resistance when the oscillating mass body 3 oscillates.
The number of the first ribs is not limited, and may be one, or two or more.
In one embodiment, the oscillating mass 3 is provided with second ribs along the radial outer side of the arc-shaped oscillating chamber 10. That is, the second cambered surface 302 of the oscillating mass body 3 is provided with a second rib extending in the circumferential direction of the oscillating mass body 3. The second rib can reduce the sliding contact area between the second arc surface 302 of the oscillating mass body 3 and the second wall surface 102 of the arc-shaped oscillating chamber 10, so as to reduce the frictional resistance when the oscillating mass body 3 oscillates.
The number of the second ribs is not limited, and may be one, or two or more.
It should be noted that, in some embodiments, only the first rib may be provided on the swinging mass body 3; in other embodiments, the oscillating mass 3 may be provided with only the second ribs; in other embodiments, the first rib and the second rib may be provided on the swinging mass body 3 at the same time.
In one embodiment, a gap is formed between the end cover 2 and the swinging mass body 3 along the rotation axis direction of the disc body 1, and the vibration damping device comprises a cushion layer 5, wherein the cushion layer 5 is clamped in the gap so as to enable the swinging mass body 3 to abut against the corresponding bottom wall of the arc-shaped swinging chamber 10. The cushion 5 can reduce the tolerance requirements for the design and manufacture of the vibration damping device, and specifically, the size of the oscillating mass body 3 in the direction of the rotation axis of the disc body 1 is smaller than that of the arc-shaped oscillating chamber 10, and the resulting tolerance can be compensated by the cushion 5. The cushion 5 prevents the oscillating mass body 3 from shifting in the direction of the rotation axis of the disk body 1, and also enables the oscillating mass body 3 to oscillate in the circumferential direction of the arc-shaped oscillating chamber 10.
The material of the cushion layer 5 is not limited, and a material having a relatively small friction coefficient with the swinging mass body 3 may be selected, and a certain compression amount is required, for example, felt, flannelette, textile fabric, etc.
In one embodiment, the shape of the cushion 5 is adapted to the shape of the oscillating mass 3 so as to be able to form a relatively uniform abutment force on the oscillating mass 3. In the embodiment in which the number of the arc-shaped oscillating chambers 10 and the number of the oscillating mass bodies 3 are plural, the number of the cushions 5 is also plural, and one cushion 5 is provided for each oscillating 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 by means of bonding or the like prior to assembly. When assembling on the assembly line, directly be connected end cover 2 with disk body 1 can, after end cover 2 and disk body 1 counterpoint, the bed course 5 has aimed at swing quality body 3 promptly.
The elastic body 4 can be compressed and elastically deformed when the swinging mass body 3 is impacted, and has a resilience force to drive the swinging mass body 3 to reset. The elastic body 4 may be a spring, a resilient pad made of a flexible material, or the like. In the embodiment that the elastic body 4 is a resilient pad, no impact noise is generated in the process that the swinging mass body 3 impacts the resilient pad, and a good noise reduction effect is achieved. Wherein, flexible material includes but not limited to: rubber, silicone, porous foam, etc.
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 buffer effect can be formed on the swinging mass body 3, and the swinging mass body 3 is prevented from forming larger impact. It will be appreciated that in this embodiment, the rebound pads need to have a large elastic deformation when the oscillating mass body 3 oscillates.
In some embodiments, grease may be injected into the arc-shaped oscillating chamber 10, and the grease may reduce the friction coefficient between the oscillating mass body 3 and the wall surface of the arc-shaped oscillating chamber 10, thereby further reducing the friction resistance when the oscillating mass body 3 oscillates.
In one embodiment, the end cap 2 encloses an arcuate swing chamber 10. That is, the oscillating mass body 3 is sealed inside the arc-shaped oscillating chamber 10. On the one hand, dust and impurities are prevented from entering the arc-shaped swinging chamber 10, and on the other hand, under the condition that lubricating grease is added into the arc-shaped swinging chamber 10, the closed arc-shaped swinging chamber 10 can prevent the lubricating grease from overflowing out of the arc-shaped swinging chamber 10.
In one embodiment, one of the tray 1 and the end cap 2 is provided with a positioning post 21, and the other is provided with a positioning slot 12b, and the positioning post 21 is inserted into the positioning slot 12 b. In the assembling process, counterpoint back with reference column 21 and positioning groove 12b, insert positioning column 21 in positioning groove 12b, at this moment, end cover 2 and disk body 1 are in exact assembly position promptly, need not operating personnel and counterpoint repeatedly, afterwards, with end cover 2 and disk body 1 fixed connection can.
It should be noted that the cross-sectional shape of the positioning column 21 is not limited, and for example, the cross-sectional shape may be a circle, an ellipse, a polygon, and the like, and is not limited herein. In the present embodiment, the positioning column 21 is in the shape of a thin plate,
the specific structural form of the tray body 1 is not limited. Exemplarily, in an embodiment, the tray body 1 includes a tray portion 11, an outer edge portion 12, an inner ring portion 13, and a plurality of rib plates 14; the outer edge portion 12, the inner ring portion 13 and the plurality of rib plates 14 all protrude out of the same side of the face plate portion 11, the outer edge portion 12 surrounds the periphery of the face plate portion 11, the inner ring portion 13 is arranged in the outer edge portion 12, an annular region is approximately formed between the outer edge portion 12 and the inner ring portion 13, and the plurality of rib plates 14 are connected between the inner side of the outer edge portion 12 and the outer side of the inner ring portion 13 so as to partition a space between the inner ring portion 13 and the outer edge portion 12 into a plurality of arc-shaped swing chambers 10, namely partition the annular region into the plurality of arc-shaped swing chambers 10.
The outline of the face plate part 11 is approximately circular, a driving hole 1a is arranged at the center of the face plate part 11, and the power input shaft is arranged in the driving hole 1a in a penetrating mode. The drive hole 1a can adopt the non-circular hole, and the part of power input shaft can be flat axle shape, so, need not to adopt the cooperation mode of key and keyway to realize that disk body 1 is connected with the drive of power input shaft.
In one embodiment, the ribs 14 are radially disposed about the center of rotation O. In one embodiment, the rib plate 14 extends 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 therein are in a roughly symmetrical structure, and the swinging stress of the swinging mass body 1 along any side in 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 joints of two adjacent petal-shaped structures 131, that is, the joint of each two adjacent petal-shaped structures 131 is correspondingly provided with the rib plate 14, the surface of one side of the petal-shaped structure 131 facing the arc-shaped swinging chamber 10 is an arc surface in sliding contact with the swinging mass body 3, that is, the surface is the first wall surface 101, and the circle center corresponding to the arc surface of each petal-shaped structure 131 is the first circle center O2The circle centers of the arc surfaces of the petal-shaped structures 131 are located around the rotation center O1On the same circle as the center of the circle, i.e. more thanA first center of a circle O2Located at the center of rotation O1The circle centers are on the same circle.
In one embodiment, the petal-shaped structure 131 is provided with a first threaded hole 13a for matching with the end cap 2, and a screw is threaded through the end cap 2 and into the first threaded hole 13a, so that the end cap 2 and the disc body 1 can be fixedly connected.
In one embodiment, the outer edge portion 12 is provided with a second threaded hole 12a for cooperating with the end cap 2, and a screw is inserted through the end cap 2 and screwed into the second threaded hole 12a, so that the end cap 2 and the tray body 1 can be fixedly connected.
In one embodiment, the plurality of first threaded holes 13a and the plurality of second threaded holes 12a are alternately arranged along the circumferential direction of the face plate portion 11. It should be noted that the alternating arrangement of the first threaded holes 13a and the second threaded holes 12a means that the rotation center O is defined as the rotation center1The face plate portion 11 is divided into a plurality of sectors as a circle center, and of two adjacent sectors, one sector has a first threaded hole 13a, and the other sector has a second threaded hole 12 a. In this embodiment, the first threaded holes 13a and the second threaded holes 12a are alternately arranged, so that the end cover 2 can be stressed more uniformly in the radial direction and the circumferential direction.
In one embodiment, the thickness of the two opposite ends of the petal structure 131 is smaller than that of the middle region along the circumferential direction of the inner ring portion 13, and the first threaded hole 13a is disposed in the middle region of the petal structure 131. In this embodiment, the petal-shaped structure 131 not only can facilitate the formation of the first arc surface 301, but also can fully utilize the structural characteristics of the petal-shaped structure 131 to install screws, thereby ensuring better connection reliability.
In one embodiment, the thickness of the region of the outer edge portion 12 in sliding contact with the swinging mass body 3 is smaller than the thickness of the region in contact with the rib plate 14 in the circumferential direction of the outer edge portion 12, and the second threaded hole 12a is provided in the region of the outer edge portion 12 in contact with the rib plate 14. In this embodiment, the arc-shaped swinging chamber 10 can be located as close as possible to the edge of the face plate portion 11, so that the swinging mass body 3 has a swinging radius as large as possible, and the structural characteristics of the outer edge portion 12 can be fully utilized to install screws, thereby ensuring good connection reliability.
In an embodiment, the edge of the end cap 2 is provided with a plurality of positioning posts 21, the outer surface of the outer edge portion 12 corresponding to the region connected to the rib plate 14 is provided with positioning slots 12b, and the positioning posts 21 are inserted into the positioning slots 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, and the compact structure of the tray body 1 is facilitated. In addition, because reference column 21 does not bear the effort basically, consequently, reference column 21 can be sheet-like structure, so can reduce the space that reference column 21 radially occupied along disk body 1, is favorable to disk body 1 compact structure.
The disk body 1 of the embodiment of the present application may be an integrally formed structure, for example, formed by forging, machining, or the like. The tray body 1 can also be formed by fixedly connecting a plurality of split parts together by welding and the like.
The specific structural form of the end cover 2 is not limited, and for example, in one embodiment, the end cover 2 is in a circular ring thin plate shape, and the power input shaft penetrates through the middle of the end cover 2. The end cap 2 may be configured to enclose all of the arcuate swing chambers 10.
In one embodiment, the tray 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 around the circumference of the tray body 1 to drive the tray body to rotate. In this embodiment, the tray body 1 may be used as a belt wheel, that is, the structural design of the belt wheel in the prior art may be changed, that is, the design of the belt wheel in the prior art is equal to the structural form of the tray body 1 in the embodiment of the present application, so that the vibration damping device can be prevented from occupying an extra installation space in the clothes treatment apparatus, the structure is compact, and the layout of the components in the existing clothes treatment apparatus is not affected.
In one embodiment, the relevant design parameters of the vibration damping device and the washing drum satisfy the constraints of the following two equations:
mh(r+h)2＝Jo(r-h) formula (1)
Figure BDA0002690047230000131
Wherein m isIs the mass of the oscillating mass; j. the design is a square0The common rotational inertia of a rotating whole body consisting of the washing drum, the power input shaft and the disc body; gamma is the order of the excitation frequency to be considered for cancellation; h is the distance between the swinging circle center of the swinging mass body and the rotation center; and r is the swing length, namely the swing radius of the swing mass body, and is also the radius of the arc-shaped swing chamber.
In the embodiment, the vibration device can realize the suppression of the vibration displacement of the washing barrel in the full rotating speed section and has a wider vibration absorption frequency band, so that the vibration absorption effect can be better realized in the whole vibration absorption frequency band of the washing barrel in the full rotating speed section, and the resonance is not generated.
The specific type of the laundry treatment apparatus according to the embodiment of the present application is not limited, and may be, for example, a pulsator type laundry treatment apparatus, and may also be a drum type laundry treatment apparatus, such as a drum washing machine, a drum washing and drying machine, a drum dryer, and the like.
It should be noted that the above-mentioned washing drum can be a perforated inner drum or a non-perforated inner drum. When the washing drum is a perforated inner drum, the clothes treatment equipment is provided with an outer drum, and the washing drum is rotationally arranged in the outer drum and depends on the outer drum to contain water; when the washing drum is a non-hole inner drum, the washing drum is used for containing water, namely, the washing drum can contain both water and clothes.
The various embodiments/implementations provided herein may be combined with each other without contradiction.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (15)

1. A vibration damping device, comprising:
the disc body (1) is provided with a rotating center and an arc-shaped swinging chamber (10), the arc-shaped swinging chamber (10) corresponds to a first circle center, and the first circle center and the rotating center are eccentrically arranged;
the swinging mass body (3) is arranged in the arc swinging chamber (10) and can do arc swinging 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 two opposite ends of the swinging mass body (3) along the swinging direction;
the end cover (2), the end cover (2) set up in one side of disk body (1), end cover (2) at least part shelters from arc swing room (10) in order to inject swing quality body (3) in arc swing room (10).
2. The damping device according to claim 1, characterized in that the number of said arc-shaped oscillating chambers (10) is plural, and a plurality of said arc-shaped oscillating chambers (10) are arranged uniformly around said rotation center; and/or the arc-shaped swinging chamber (10) is positioned at the edge of the disc body (1).
3. Damping device according to claim 1, characterized in that the end cover (2) encloses the arc-shaped oscillation chamber (10).
4. Damping device according to claim 1, characterized in that one of the disc (1) and the end cap (2) is provided with a positioning post (21), and the other is provided with a positioning slot (12b), the positioning post (21) being inserted into the positioning slot (12 b).
5. The vibration damping device according to claim 1, characterized in that the oscillating mass body (3) has a fan-ring shape, and the radially inner side surface and the radially outer side surface of the oscillating mass body (3) are in sliding contact with the corresponding wall surfaces of the arc-shaped oscillating chamber (10).
6. The vibration damping device according to claim 5, characterized in that a surface of the oscillating mass body (3) on a radially inner side is provided with a first rib; and/or a second convex rib is arranged on the surface of the swing mass body (3) along the radial outer side.
7. Damping device according to claim 1, characterized in that there is a gap between the end cap (2) and the oscillating mass (3), the damping device comprising a cushion (5), the cushion (5) being interposed in the gap to abut the oscillating mass (3) against the corresponding bottom wall of the arc-shaped oscillating chamber (10).
8. Damping device according to claim 7, characterized in that the elastic body (4) is a spring or that the elastic body (4) is a resilient pad made of a flexible material.
9. The vibration damping device according to claim 1, wherein the disc body (1) includes a disc portion (11), an outer rim portion (12), an inner ring portion (13), and a plurality of rib plates (14); the outer edge portion (12), the inner ring portion (13) and the plurality of rib plates (14) protrude out of the same side of the face plate portion (11), the outer edge portion (12) surrounds the periphery of the face plate portion (11), the inner ring portion (13) is arranged in the outer edge portion (12), and the plurality of rib plates (14) are connected between the inner side of the outer edge portion (12) and the outer side of the inner ring portion (13) so as to divide a space between the inner ring portion (13) and the outer edge portion (12) into a plurality of arc-shaped swing chambers (10).
10. The vibration damper according to claim 9, wherein the inner ring portion (13) is formed by sequentially connecting a plurality of petal-shaped structures (131) end to end, the rib plate (14) is connected to a joint of two adjacent petal-shaped structures (131), a surface of one side of each petal-shaped structure (131) facing the arc-shaped swinging chamber (10) is an arc surface in sliding contact with the swinging mass body (3), and centers of circles corresponding to the arc surfaces of the petal-shaped structures (131) are located on the same circle with the rotation center as a center of circle.
11. The vibration damping device according to claim 10, characterized in that the petal-shaped structure (131) is provided with first threaded holes (13a) for engagement with the end cap (2), the outer rim portion (12) is provided with second threaded holes (12a) for engagement with the end cap (2), and a plurality of the first threaded holes (13a) and a plurality of the second threaded holes (12a) are alternately arranged in a circumferential direction of the dial portion (11).
12. The vibration damping device according to claim 11, characterized in that, in the circumferential direction of the inner ring portion (13), the thickness of opposite ends of the petal structure (131) is smaller than that of a middle region, and the first threaded hole (13a) is provided in the middle region of the petal structure (131); and/or the thickness of the sliding contact area of the outer edge part (12) and the swinging mass body (3) is smaller than that of the area used for being connected with the rib plate (14) along the circumferential direction of the outer edge part (12), and the second threaded hole (12a) is arranged in the area of the outer edge part (12) used for being connected with the rib plate (14).
13. The vibration damping device according to claim 10, characterized in that a plurality of positioning posts (21) are arranged at the edge of the end cover (2), a positioning clamping groove (12b) is arranged on the outer surface of the outer edge portion (12) corresponding to the region for connecting with the rib plate (14), and the positioning posts (21) are inserted into the positioning clamping grooves (12 b).
14. A laundry treating apparatus, comprising:
a washing drum;
the power input shaft is in driving connection with the washing drum to drive the washing drum to rotate;
the vibration damping device according to any one of claims 1 to 13, wherein one of said washing drum or said power input shaft is fixedly connected to said vibration damping device, and the center of rotation of said disc (1) is located on the axis of said power input shaft.
15. The laundry treating apparatus according to claim 14, wherein the tray body (1) is disposed coaxially with the power input shaft and is sleeved on the power input shaft, and the laundry treating apparatus includes a belt which is wound around a circumference of the tray body (1) to rotate the tray body (1).
CN202010988541.5A 2020-09-18 2020-09-18 Vibration damper and clothes treatment equipment Active CN114197164B (en)

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