CN114197165B - Vibration damping assembly and clothes treatment equipment - Google Patents
Vibration damping assembly and clothes treatment equipment Download PDFInfo
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- CN114197165B CN114197165B CN202010990262.2A CN202010990262A CN114197165B CN 114197165 B CN114197165 B CN 114197165B CN 202010990262 A CN202010990262 A CN 202010990262A CN 114197165 B CN114197165 B CN 114197165B
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- 238000013016 damping Methods 0.000 title claims abstract description 45
- 238000005406 washing Methods 0.000 claims abstract description 100
- 230000009467 reduction Effects 0.000 claims description 22
- 230000000712 assembly Effects 0.000 claims description 16
- 238000000429 assembly Methods 0.000 claims description 16
- 239000004519 grease Substances 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 239000011324 bead Substances 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 7
- 230000010355 oscillation Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 4
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- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000002829 reductive effect Effects 0.000 abstract description 10
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Classifications
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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
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
Abstract
The embodiment of the application provides a vibration damping assembly and clothes treatment equipment, wherein the vibration damping assembly comprises a base body, a swinging mass body, a plurality of elastic bodies and a stop piece connected with the base body, the base body is provided with an arc swinging chamber, the arc swinging chamber corresponds to a first circle center, and one side of the arc swinging chamber is opened; the swinging mass body is arranged in the arc swinging chamber; the elastic piece is 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 stopper at least partially shields the opening of the arc-shaped swing chamber to define the swing mass within the arc-shaped swing chamber. The centrifugal force of the swinging mass body along the tangential direction of the rotation of the washing drum can restrain the speed fluctuation of the washing drum, larger inertia can be generated by smaller mass arrangement to resist vibration excitation caused by eccentric rotation of the washing drum, the vibration noise performance and the mass utilization efficiency of the swinging mass body are improved, the counterweight mass of the clothes treatment equipment can be greatly reduced, and even the large-mass counterweight in the related technology can be cancelled.
Description
Technical Field
The application relates to the technical field of vibration reduction, in particular to a vibration reduction assembly 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 on the vibration of the drum part, which is an important source of the vibration and noise of the whole machine.
In the related art, by adding the balancing weight 2' to the tub 1' to improve the overall vibration stability of the system and reduce the vibration displacement of the tub, as shown in fig. 1, an exemplary washing machine is provided with three balancing weights, and the top side and the left and right sides of the tub 1' are respectively provided with a balancing weight with larger mass. However, this approach still has the following problems: (1) The efficiency of the static counterweight mass for stabilizing vibration of the barrel part is low, and the mass waste is large; (2) The large weight occupies large space in the box body, so that the arrangement space of the washing volume and other parts is limited; (3) The counterweight with large mass causes the heavy weight of the whole machine, and is inconvenient to use and transport.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a vibration damping assembly and a laundry treating apparatus capable of producing a good vibration damping effect with a relatively small counterweight mass.
In order to achieve the above purpose, an embodiment of the present application provides a vibration damping assembly, including a base, a swinging mass body, a plurality of elastic bodies, and a stop member connected with the base, where the base has an arc swinging chamber, the arc swinging chamber corresponds to a first circle center, and one side of the arc swinging chamber is open; 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; the elastic piece is 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 stop at least partially obstructs an opening of the arcuate swing chamber to define the swing mass within the arcuate swing chamber.
In some embodiments, the stopper closes an opening of the arc-shaped swing chamber to make the arc-shaped swing chamber a closed space.
In some embodiments, the oscillating mass is a metal piece, the seat is a metal piece, and the arc-shaped oscillating chamber is filled with grease.
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, the elastomer is a resilient pad made of a flexible material; along the swinging direction of the swinging mass body, one side of the rebound pad is contacted with the wall surface of the arc swinging chamber, and the other side of the rebound pad is contacted with the swinging mass body.
In some embodiments, the vibration reduction assembly comprises a connecting plate connected with the seat body, wherein a mounting hole is formed in the connecting plate, and the vibration reduction assembly is connected with other mounting structures through the connecting plate.
In some embodiments, the base is curved toward the first center, the web and the first center are located on a concave side of the base, and the web is parallel to a plane of a swing trajectory of the swing mass.
The embodiment of the application also provides a clothes treatment device, which comprises a washing cylinder and the vibration reduction assembly in the part of the embodiment, wherein the washing cylinder is provided with a rotation center line; the vibration reduction assemblies are arranged at intervals along the circumferential direction of the washing cylinder, the seat body is fixedly connected with the washing cylinder, and the first circle center and the rotation center line are eccentrically arranged.
In some embodiments, the washing drum comprises a drum body and a front end cover arranged on the front side of the drum body, and a plurality of vibration reduction assemblies are arranged on the front end cover.
In some embodiments, the vibration reduction assembly is disposed in the front end cap toward the rear side of the barrel and within the barrel.
In some embodiments, the front end cover includes a ring plate, an inner ring rib, an outer ring rib and a plurality of reinforcing ribs, the inner ring rib surrounds the radially inner side edge of the ring plate, the outer ring rib surrounds the radially outer side edge of the ring plate, the inner ring rib and the outer ring rib are jointly enclosed into a ring groove, and the plurality of reinforcing ribs are connected between the inner ring rib and the outer ring rib to space the ring groove into a plurality of sub-grooves; the vibration reduction assembly comprises a connecting plate connected with the base body, wherein the connecting plate is positioned in the sub-groove, and the connecting plate is overlapped with the circular ring plate and fixedly connected with the circular ring plate.
In some embodiments, the perimeter of the web contacts the corresponding inner wall of the subslot.
In some embodiments, the seat abuts the inner surface of the barrel along a radially outer surface of the wash barrel.
In some embodiments, the outer side surface of the seat body along the radial direction of the washing cylinder is an arc surface, and the arc surface is fit with the inner surface of the cylinder body.
The vibration damping assembly of the embodiment of the application is an inertial vibration damping system, and is formed by a component force F a Or component force F b Suppressing speed fluctuation of washing drum due to component force F a Or component force F b In the tangential direction of rotation of the washing drum, the fluctuation of the speed of the washing drum can be effectively suppressed, that is, a certain component force F can be generated even if the mass of the oscillating mass body is small a Or component force F b The vibration absorbing assembly has the advantages that the vibration absorbing assembly can generate larger inertia to resist vibration excitation caused by eccentric rotation of the washing drum by arranging smaller masses, the vibration noise performance is improved, the mass utilization efficiency of the swinging mass body is greatly improved, the counterweight mass of the clothes treatment equipment can be greatly reduced, even a large-mass counterweight in the related technology can be canceled, and the expansion of the clothes treatment equipment and the arrangement of internal parts are facilitated. In addition, the vibration reduction assembly can be flexibly arranged according to the space of the washing cylinder, so that the installation requirement on the installation space of the washing cylinder is reduced.
Drawings
FIG. 1 is a simplified diagram of a related art washing drum when eccentrically rotated;
FIG. 2 is a schematic, partially exploded view of a vibration reduction assembly according to one embodiment of the present application;
FIG. 3 is an exploded view of the housing, oscillating mass, and elastomer of FIG. 2;
FIG. 4 is a schematic view of the end cap of FIG. 2 from another perspective;
fig. 5 is a partial structural schematic view of a laundry treating apparatus according to an embodiment of the present application;
FIG. 6 is a schematic diagram illustrating the mating of the front end cover of FIG. 5 with a plurality of vibration reduction assemblies according to one embodiment of the present disclosure;
FIG. 7 is a simplified schematic diagram of a vibration damping assembly and a wash bowl according to an embodiment of the present application;
FIG. 8 is a simplified mechanical model schematic diagram of a wash bowl according to an embodiment of the present application when a transient deceleration occurs;
FIG. 9 is a simplified mechanical model schematic of a wash bowl according to an embodiment of the present application when transient acceleration occurs;
FIG. 10 is a schematic diagram of a speed analysis of non-fixed axis rotation of the wash bowl.
Reference numerals describe the vibration damping assembly 1; a base 11; an arc-shaped swing chamber 11a; a screw hole 11b; a first wall surface 111; a second wall 112; a third wall surface 113; a circular arc surface 114; a swinging mass body 12; a first cambered surface 12a; a second cambered surface 12b; a first rib 121; second ribs 122; an elastic body 13; a stopper 14; a through hole 14a; a connection plate 15; a mounting hole 15a; a washing drum 2; a cylinder 21; a front end cap 22; a circular plate 221; an inner ring rib 222; an outer ring rib 223; a reinforcing rib 224; subslot 22a
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 "front", "rear" orientation or positional relationship is based on the orientation or positional relationship shown in fig. 5, and it should be understood that these orientation terms are merely for convenience of description and to simplify the description, and are not indicative or implying that the apparatus or element in question 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 application provides a vibration damping assembly 1, please refer to fig. 2 and 3, including a base 11, a swinging mass 12, a stop 14 and a plurality of elastic bodies 13, the base 11 is provided with an arc swinging chamber 11a, please refer to fig. 7 to 9, the arc swinging chamber 11a corresponds to a first center O 1 One side of the arc-shaped swing chamber 11a is opened so as to take and put the swing mass body 12 from the opened portion of the arc-shaped swing chamber 11a. Referring to FIG. 4, for an example, a first center of circle O 1 With the rotation center O 2 The distance between the two is h, and the radius corresponding to the mean camber line of the arc-shaped swinging chamber 11a is r.
Referring to fig. 2, 4 and 7, the oscillating mass 12 is provided withIs arranged in the arc-shaped swinging chamber 11a and can be positioned at a first circle center O 1 And (5) making circular arc swing for the circle center. The oscillating mass 12 is provided with elastic bodies 13 at opposite ends in the oscillating direction, that is, the oscillating mass 12 does not strike wall surfaces at opposite ends of the arc-shaped oscillating chamber 11a, whether it oscillates in the clockwise direction in fig. 7 or in the counterclockwise direction in fig. 7. It should be noted that the grid lines in fig. 4 and 7 are only for clearly illustrating the outline of the elastic body 13, and are not cut through the filling lines.
A stopper 14 is provided at one side of the seat body 11, the stopper 14 at least partially shielding the opening of the arc-shaped swing chamber 11a to define the swing mass body 12 within the arc-shaped swing chamber 11a. That is, the stopper 14 plays a limiting role on the oscillating mass body 12, preventing the oscillating mass body 12 from coming out of the opening of the arc-shaped oscillating chamber 11a.
The application field of the vibration damping assembly 1 of the embodiment of the present application is not limited. The present application is described by way of example with respect to the application of the vibration damping assembly 1 to a laundry treating apparatus. It will be appreciated that the vibration damping assembly 1 may also be used in other mechanical devices.
The present embodiment also provides a clothes treating apparatus, referring to fig. 5 and 6, comprising a washing drum 2 and a vibration damping assembly 1 according to any of the embodiments of the present application. The washing drum 2 has a rotation center line (abbreviated as a second center O in fig. 7 to 9 2 ) The washing tub 2 rotates around the rotation center line. The plurality of vibration reduction assemblies 1 are arranged at intervals along the circumferential direction of the washing drum 2, and the base 11 is fixedly connected with the washing drum 2, that is, the base 11 can synchronously rotate along with the washing drum 2. First circle center O 1 Is eccentrically arranged with the rotation central line, namely a first circle center O 1 With a second centre of a circle O 2 Eccentrically arranged, i.e. with a first centre of a circle O 1 Not on the rotational centerline.
In fig. 7 to 9, the circle I is centered at the first center O 1 Is a circle with the center of a circle and the swing length corresponding to the arc-shaped swing chamber as the radius. The circle II is with the second circle center O 2 A circle with the outer diameter of the washing drum 2 as the radius, i.e. a circle ii, is also regarded as the cross-sectional shape of the washing drum.
The clothes treating apparatus further includes an outer tub and a power input shaft, 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 rotation of the washing drum 2 is a non-fixed axis rotation, and the position of the rotation center line of the washing drum 2 is not changed basically. When the load in the washing cylinder 2 is eccentric, the washing cylinder 2 can be eccentrically rotated, the rotation center line of the washing cylinder 2 can be continuously changed in the rotation process, the power input shaft can be driven to eccentrically rotate when the washing cylinder 2 eccentrically rotates, and then vibration is transmitted to the outer cylinder through the bearing and the bearing seat, so that the outer cylinder is forced to regularly vibrate, the vibration performance of the whole cylinder part assembly formed by the outer cylinder, the washing cylinder and other parts is poor, and larger noise can be generated. Referring to fig. 10, the rotation center of the washing drum 2 at any time has a speed increment of Δv o I.e. the speed at the centre line of rotation fluctuates, according to rigid kinematic principles, the instantaneous speed at any one of the edges of the washing drum 2 is ω+Δv oτ Wherein ω is the rotational angular velocity of the wash bowl 2, R is the radius of the wash bowl 2, deltaV oτ Is DeltaV o Tangential component, deltaV, at the edge of the wash bowl 2 oτ The edge of the washing tub 2 is caused to have a speed fluctuation, thereby generating a large vibration displacement and vibration noise. 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 at the rotation center line of the washing drum 2 causes fluctuation of the edge speed of the washing drum 2, and thus, the problem of the rotation of the washing drum 2 is a generalized torsional vibration problem.
Referring to fig. 8, the washing drum 2 is rotated clockwise in fig. 8 if the washing drum 2 is rotatedThe speed transient increase at the centerline, the oscillating mass 12 creates a transient oscillation angle rearward in the direction of rotationThe swinging mass body 12 presses the cambered surface of the cambered swinging chamber 11a on the radial outer side under the action of centrifugal force, and the swinging mass body 12 generates a pressing force F to the cambered surface 1 Extrusion force F 1 Radially outwardly of the wash bowl 2. The pressing force F 1 To oscillate the mass body 12 by a first centre of circle O 1 Is the centrifugal force generated by the circle center. Due to the first centre of a circle O 1 With a second centre of a circle O 2 Eccentrically arranged, the extrusion force F 1 With force component F in tangential direction of the arc a Component F of force a The edge speed fluctuation of the washing drum 2 can be restrained, the amplitude of the washing drum 2 is reduced, and the effect of weakening the vibration excitation of the washing drum 2 is achieved. Specifically, the above-mentioned pressing force F 1 The intersection point of the straight line and the cambered surface of the cambered swinging chamber 11a is C 1 Point, straight line C 1 O 1 To be at the first center of circle O 1 Straight line C with radius of circle center 1 O 2 To be at the second center of circle O 2 A straight line with radius of circle center, component force F a Perpendicular to straight line C 1 O 2 。
Referring to fig. 9, the washing tub 2 rotates clockwise in fig. 9, and if the speed at the center line of rotation of the washing tub 2 is transiently reduced, the oscillating mass 12 generates a transient oscillation angle forward in the rotation directionThe swinging mass body 12 presses the cambered surface of the cambered swinging chamber 11a on the radial outer side under the action of centrifugal force, and the swinging mass body 12 presses the extruding force F of the cambered surface 2 Extrusion force F 2 Radially outwardly of the wash bowl 2. The pressing force F 2 To oscillate the mass body 12 by a first centre of circle O 1 Is the centrifugal force generated by the circle center. Due to the first centre of a circle O 1 With a second centre of a circle O 2 Eccentrically arranged, the extrusion force F 2 With force component F in tangential direction of the arc b Dividing intoForce F b The fluctuation of the rotation center speed of the washing drum 2 can be restrained, the fluctuation of the edge speed of the washing drum 2 is finally reduced, the amplitude of the washing drum 2 is reduced, and the effect of weakening the vibration excitation of the washing drum 2 is achieved. Specifically, the above-mentioned pressing force F 2 The intersection point of the straight line and the cambered surface of the cambered swinging chamber 11a is C 2 Point, straight line C 2 O 1 To be at the first center of circle O 1 Straight line C with radius of circle center 2 O 2 To be at the second center of circle O 2 A straight line with radius of circle center, component force F b Perpendicular to straight line C 2 O 2 。
It should be noted that the plurality of vibration damping assemblies 1 are distributed uniformly as much as possible along the circumferential direction of the washing tub 2, so as to avoid eccentric rotation of the washing tub 2 caused by the plurality of vibration damping assemblies 1 themselves as much as possible.
From the above analysis, the component force F a Or component force F b All lie in the swing track plane of the swing mass body 12, that is to say, lie in the plane that the rotation central line that is perpendicular to the wash bowl 2 lies in, and along the rotation tangential direction of the wash bowl 2, centrifugal force F1 or F2 that a plurality of damping assemblies 1 produced can offset or partially offset to a certain extent completely, therefore, because the numerical value of the centrifugal force after the stack that a plurality of damping assemblies 1 jointly formed can be less even tend to 0, therefore, the damping assembly 1 of this application embodiment can avoid or greatly reduce the moment of flexure in this application background art, improve the stress condition of power input shaft, promote the life of power input shaft.
The vibration damping assembly 1 of the embodiment of the present application is an inertial vibration damping system, which is damped by a component force F a Or component force F b Suppressing speed fluctuation of the washing drum 2 due to component force F a Or component force F b In the tangential direction of rotation of the washing drum 2, the fluctuation of the speed of the washing drum 2 can therefore be effectively suppressed, that is, a certain component force F can be generated even if the mass of the oscillating mass body 12 is small a Or component force F b The vibration absorbing assembly has good vibration absorbing effect, namely, the vibration absorbing assembly can generate larger inertia to resist vibration excitation caused by eccentric rotation of the washing cylinder 2 by smaller mass arrangement, and improve vibration noiseThe sound performance can greatly improve the mass utilization efficiency of the swinging mass body 12, greatly reduce the counterweight quality of the clothes treatment equipment, even cancel the large-mass counterweight in the related art, facilitate the expansion of the clothes treatment equipment and facilitate the arrangement of internal parts. In addition, the vibration damping assembly 1 of the embodiment of the application can be flexibly arranged according to the space of the washing drum 2, so that the installation requirement on the installation space of the washing drum 2 is reduced.
It should be noted that the material density of the oscillating mass 12 is higher, so as to have a larger mass at the same volume, so as to generate a larger inertia. For example, the oscillating mass 12 is a metal piece. It will be appreciated that the housing 11 and/or the stop 14 may also be a metal piece.
Referring to fig. 3, the arc-shaped swing chamber 11a has a first wall surface 111 along a radial inner side, a second wall surface 112 along a radial outer side, and two third wall surfaces 113 along two opposite sides along a circumferential direction, wherein the first wall surface 111 and the second wall surface 112 are arc surfaces concentrically arranged, and a circle center corresponding to the first wall surface 111 and the second wall surface 112 is the first circle center O 1 . In fig. 7 to 9, a mean camber line between the first wall surface 111 and the second wall surface 112 coincides with the circle I. The mean camber line is a curve having the same distance from the first wall surface 111 and the second wall surface 112.
In one embodiment, referring to fig. 4, the oscillating mass 12 has a fan shape adapted to the arc-shaped oscillating chamber 11a. Referring to fig. 3, the fan-shaped oscillating mass 12 has a first cambered surface 12a along a radial inner side and a second cambered surface 12b along a radial outer side, the first cambered surface 12a and the second cambered surface 12b are concentrically arranged, and the circle centers corresponding to the first cambered surface 12a and the second cambered surface 12b are the first circle center O 1 。
In one embodiment, referring to fig. 4, the radially inner surface and the radially outer surface of the oscillating mass 12 are in sliding contact with the corresponding wall surfaces of the arc-shaped oscillating chamber 11a. Specifically, the first cambered surface 12a of the oscillating mass body 12 is in sliding contact with the first wall surface 111 of the arcuate oscillating chamber 11a, and the second cambered surface 12b of the oscillating mass body 12 is in sliding contact with the second wall surface 112 of the arcuate oscillating chamber 11a. That is, the oscillating mass 12 is in clearance fit with the arc-shaped oscillating chamber 11a, and the clearance tolerance is controlled within a small range, so that, on the one hand, a good guiding effect on the oscillating mass 12 is facilitated, and, on the other hand, a large displacement of the oscillating mass 12 in the radial direction is avoided, and the oscillating mass 12 is prevented from striking the above-mentioned first wall surface 111 or second wall surface 112 of the arc-shaped oscillating chamber 11a in the radial direction.
In one embodiment, referring to fig. 3 and 4, the oscillating mass 12 is provided with a first rib 121 along the radial inner side of the arc-shaped oscillating chamber 11a. That is, the first cambered surface 12a of the oscillating mass body 12 is provided with the first bead 121, and the first bead 121 extends in the circumferential direction of the oscillating mass body 12. The first ribs 121 can reduce the sliding contact area between the first cambered surface 12a of the oscillating mass body 12 and the first wall surface 111 of the cambered oscillating chamber 11a to reduce the frictional resistance when the oscillating mass body 12 oscillates.
The number of the first ribs 121 is not limited, and may be one, two or more.
In one embodiment, referring to fig. 3 and 4, the oscillating mass 12 is provided with a second rib 122 along the radial outer side of the arc-shaped oscillating chamber 11a. That is, the second cambered surface 12b of the oscillating mass body 12 is provided with the second bead 122, and the second bead 122 extends in the circumferential direction of the oscillating mass body 12. The second ribs 122 can reduce the sliding contact area between the second cambered surface 12b of the oscillating mass body 12 and the second wall surface 112 of the cambered oscillating chamber 11a, so as to reduce the friction resistance when the oscillating mass body 12 oscillates.
The number of the second ribs 122 is not limited, and may be one, two or more.
It should be noted that, in some embodiments, only the first ribs 121 may be disposed on the oscillating mass 12. In other embodiments, the oscillating mass 12 may be provided with only the second ribs 122 described above. In other embodiments, the first rib 121 and the second rib 122 may be disposed on the oscillating mass 12 at the same time.
The elastic body 13 is capable of generating compression elastic deformation upon impact of the oscillating mass 12, and has a rebound force to drive the oscillating mass 12 to return. The elastic body 13 may be a spring, a rebound pad made of a flexible material, or the like.
In the embodiment in which the elastic body 13 is a rebound pad, impact noise is not generated in the process of impacting the rebound pad by the oscillating mass body 12, and a better noise reduction effect is achieved. Wherein the flexible material includes but is not limited to: rubber, silica gel, porous foam, and the like. It should be noted that, the rebound pad needs to have a larger elastic deformation when the oscillating mass 12 oscillates, so as to perform a better buffering function.
Referring to fig. 4, in the embodiment in which the elastic body 13 is a rebound cushion, a buffer space is provided between the end surface of the oscillating mass body 12 in the circumferential direction and the wall surface corresponding to the arc-shaped oscillating chamber 11a, and the rebound cushion occupies the buffer space. That is, in the swinging direction of the swinging mass body 12, one side of the rebound pad is in contact with the wall surface of the arc-shaped swinging chamber 11a, and the other side of the rebound pad is in contact with the swinging mass body 12. The direction of oscillation of the oscillating mass 12 is clockwise or counterclockwise in fig. 7. In this way, a better cushioning effect can be formed on the oscillating mass body 12, the oscillating mass body 12 is prevented from impacting the rebound pads, and in addition, the rebound pads on both sides of the oscillating mass body 12 are also convenient for accurately restoring the oscillating mass body 12 to the initial position.
The specific structural form of the stopper 14 is not limited as long as the swinging mass body 12 is prevented from being separated from the arc-shaped swinging chamber 11a. For example, the stopper 14 may have a net shape, a plate shape, a rod shape, or the like. In an embodiment, referring to fig. 2, the stop member 14 is substantially flat, so that the stop member 14 can be substantially attached to the surface of the seat 11, so as to reduce the size of the vibration damper assembly 1 along the direction perpendicular to the plane of the swing track of the swing mass 12 as much as possible.
In particular, the contour of the stop 14 does not exceed the contour of the seat 11 in the plane of the oscillation path of the oscillating mass 12, so that an additional increase in the contour dimension of the damping assembly 1 by the stop 14 is avoided. The plane of the oscillation track of the oscillating mass body 12 is the paper surface in fig. 4.
In one embodiment, the stopper 14 closes the arc-shaped swing chamber 11a. That is, the oscillating mass 12 is sealed in the arc-shaped oscillating chamber 11a. On the one hand, dust and impurities are prevented from entering the arc-shaped swinging chamber 11a, and on the other hand, other parts are prevented from extending into the arc-shaped swinging chamber 11a to interfere with swinging of the swinging mass body 12. In an embodiment, the arc-shaped swinging chamber 11a is filled with grease, the sealed arc-shaped swinging chamber 11a can prevent the grease from overflowing out of the arc-shaped swinging chamber 11a, the grease plays a role in lubrication, and the friction coefficient between the swinging mass body 12 and the wall surface of the arc-shaped swinging chamber 11a can be reduced, so that the friction resistance of the swinging mass body 12 during swinging is further reduced; in addition, the grease can also play a role of filling the gap between the oscillating mass body 12 and the wall surface of the arc-shaped oscillating chamber 11a, so that the oscillation of the oscillating mass body 12 is smoother; furthermore, the grease can also play a role in rust prevention.
The arc-shaped swing chamber 11a is closed to the extent that grease is prevented from leaking out of the interface between the seat 11 and the stopper 14. Grease is understood to mean a thick greasy semisolid.
The connection between the stopper 14 and the base 11 is not limited. For example, in one embodiment, referring to fig. 2, the stopper 14 is provided with a plurality of through holes 14a, and the seat 11 is provided with a plurality of screw connection holes 11b along the circumference of the arc-shaped swing chamber 11a, and screws may be inserted through the through holes 14a and screwed into the corresponding screw connection holes 11 b.
The connection manner of the vibration damping assembly 1 and the washing drum 2 or other mounting structures is not limited, and specifically, the seat 11 may be directly or indirectly fixedly connected with the washing drum 2 or other structures.
In an exemplary embodiment, referring to fig. 2 to 4, the vibration damping assembly 1 includes a connection plate 15 connected to the base 11, and the connection plate 15 is provided with a connection hole 15a, so that the vibration damping assembly 1 is connected to other structures through the connection plate 15. Specifically, during assembly, a screw or bolt may be inserted through the connection hole 15a and screwed into the wash tub 2 or other structure. In this way, the connection plate 15 may be thinner than the base 11 in the thickness direction perpendicular to the plane of the swing locus of the swing mass body 12, so that a screw or bolt passes through the connection hole 15a.
In one embodiment, the base 11 faces the first center O 1 Bending, in particular, the seat 11 is substantially sector-shaped, the web 15 and the first centre O 1 Located at the seatThe concave side of the body 11, the connecting plate 15 is parallel to the swing track plane of the swing mass body 12, so that the connecting plate 15 can fully utilize the installation space of the groove of the seat body 11, and the vibration reduction assembly 1 is beneficial to compact structure.
The seat 11 of the present embodiment may be an integrally formed structure, for example, formed by forging, machining, or the like.
It should be noted that, the seat 11 corresponding to the plurality of vibration damping assemblies 1 may be connected to any position of the washing tub 2 in the axial direction, so long as the vibration damping assemblies can rotate synchronously with the washing tub 2 and do not interfere with other structures of the laundry treating apparatus.
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 2 may be a perforated washing drum or a non-perforated washing drum. When the washing cylinder 2 is a porous washing cylinder, the water is contained by the outer cylinder; when the washing drum 2 is a hole-free washing drum, water is contained by the washing drum 2 itself, that is, both water and laundry can be contained in the washing drum 2.
In an exemplary embodiment, referring to fig. 5, the washing drum 2 includes a drum 21 and a front cover 22 disposed on a front side of the drum 21, wherein the front cover 22 is fixedly connected to the drum 21, and the front cover 22 and the drum 21 form a rigid unit. The plurality of vibration reduction assemblies 1 are connected with the front end cover 22, and specifically, the seat bodies 11 corresponding to the plurality of vibration reduction assemblies 1 are directly or indirectly fixedly connected with the front end cover 22. In this embodiment, the maximum rotation radius of the vibration damping assembly 1 during rotation can be made not to exceed the maximum rotation radius of the cylinder 21, and the vibration damping assembly 1 does not increase the circumferential space required for rotation of the washing drum 2.
The side of the laundry treating apparatus facing the user is "front", and the side facing away from the user is "rear". That is, the front cover 22 is located on the side of the cylinder 21 close to the user, i.e., in this embodiment, the washing tub 2 is a drum-type washing tub.
The front cover 22 is substantially annular, and the front cover 22 is substantially coaxial with the cylinder 21. The front end of the cylindrical body 21 abuts against the rear surface of the front end cover 22, and the outer diameter of the cylindrical body 21 is substantially the same as the outer diameter of the front end cover 22.
The specific connection manner of the front end cover 22 and the cylinder 21 is not limited, and for example, in the case where the front end cover 22 and the cylinder 21 are both made of metal, the front end cover 22 and the cylinder 21 may be fixedly connected by welding.
In one embodiment, the vibration damping assembly 1 is disposed on the rear side of the front end cover 22 facing the cylinder 21 and located in the cylinder 21. That is, the vibration damping assembly 1 is located in a space defined by the cylinder 21 and the front end cover 22, on one hand, enough space is provided in the cylinder 21 to install the vibration damping assembly 1, and on the other hand, the vibration damping assembly 1 does not occupy other space outside the washing drum 2, so as to avoid influencing the structural arrangement of the existing electrical elements of the clothes treatment device, therefore, the vibration damping assembly 1 of the embodiment of the present application can be integrated on the existing clothes treatment device more conveniently, and is convenient for updating the existing clothes treatment device; on the other hand, even if there is eccentric rotation of the washing drum 2, the vibration damping assembly 1 will not strike other parts.
In an embodiment, referring to fig. 6, the front end cover 22 includes a circular plate 221, an inner circular rib 222, an outer circular rib 223 and a plurality of reinforcing ribs 224, the inner circular rib 222 surrounds the radially inner edge of the circular plate 221, the outer circular rib 223 surrounds the radially outer edge of the circular plate 221, the reinforcing ribs 224 are connected between the inner circular rib 222 and the outer circular rib 223, and the reinforcing ribs 224 can enhance the structural strength and rigidity of the front end cover 22, so that the front end cover 22 is not easy to deform. The outer ring bead 223, the inner ring bead 222, and the ring plate 221 collectively define an annular groove, with a plurality of ribs 224 separating the annular groove into a plurality of sub-grooves 22a.
With continued reference to fig. 6, the connection plate 15 is located in the sub-slot 22a, and the connection plate 15 is stacked and fixedly connected with the annular plate 221. By extending the connection plate 15 into the sub-groove 22a, on the one hand, the sub-groove 22a plays a role of positioning and stopping the connection plate 15, and on the other hand, the contact area between the connection plate 15 and the front end cover 22 can be increased, and the connection reliability of the connection plate and the front end cover 22 is improved.
During assembly, the vibration reduction assembly 1 is preassembled into a whole, the vibration reduction assembly 1 is abutted against the rear side of the front end cover 22, and a screw or bolt passes through the mounting hole 15a on the connecting plate 15 and is screwed into the front end cover 22. The rest of the damper assemblies 1 are sequentially mounted on the front end cover 22.
In some embodiments, a threaded hole may be reserved on the annular plate 221, and a screw or a bolt may be screwed into the threaded hole during assembly. In other embodiments, if the front end cover 22 is made of a material that can be tapped by a self-tapping screw, the self-tapping screw may be used to directly tap into the annular plate 221 during assembly, that is, in this embodiment, it is not necessary to make a screw hole in the front end cover 22 in advance.
In some embodiments, the front end cover 22 may be an integrally formed structure, and the reinforcing ribs 224, the outer ring rib 223, the inner ring rib 222, etc. may be formed by cold working such as stamping.
The specific structural shape of the connection plate 15 is not limited. Illustratively, in one embodiment, the periphery of the connection plate 15 is in contact with the corresponding inner wall of the sub-slot 22a. That is, the shape of the connecting plate 15 is adapted to the shape of the sub-slot 22a, when the connecting plate 15 is placed in the sub-slot 22a, the periphery of the connecting plate 15 abuts against the inner wall of the sub-slot 22a, so that the connecting plate 15 is positioned in the sub-slot 22a, the connecting plate 15 cannot move in the sub-slot 22a, positioning effect is achieved on the connecting plate 15, deflection of the connecting plate 15 is prevented, shearing force of the screw or the screw is avoided, and stress condition of the screw or the screw is improved.
In one embodiment, the seat 11 abuts against the end of the rib 224 facing away from the annular plate 221, and the outer surface of the seat 11 along the radial direction of the washing drum 2 abuts against the inner surface of the drum 21. The seat 11 is radially limited and abutted by the cylinder 21. Specifically, when the washing tub 2 rotates, the vibration damping assembly 1 receives centrifugal force, has a tendency to move radially outward, and provides a supporting reaction force to the base 11 through the tub 21 to balance the centrifugal force received by the base 11, preventing the screws or bolts at the connection of the connection plate 15 and the annular plate 221 from receiving large shearing force.
In one embodiment, referring to fig. 6, the surface of the base 11 along the radial outer side of the washing drum 2 is an arc surface 114, and the arc surface 114 is attached to the inner surface of the drum 21. That is, the radius corresponding to the circular arc surface 114 is approximately the same as the radius of the cylinder 21, so that the circular arc surface 114 can be completely attached to the inner surface of the cylinder 21, and thus, the contact area between the cylinder 21 and the seat 11 can be increased, so that the cylinder 21 provides a better supporting and limiting effect on the seat 11.
In one embodiment, the relevant design parameters of the damping assembly 1 and the wash bowl 2 satisfy the constraints of the following two formulas:
mh(r+h) 2 ＝J o (r-h) formula (1)
Wherein m is the mass of the oscillating mass 12; j is the common moment of inertia of a rotary whole formed by the washing cylinder, the power input shaft and the disc 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 12 and the rotation center line of the washing drum, namely the first center O in FIG. 7 1 And a second center of circle O 2 A distance therebetween; r is the pendulum length, i.e. the pendulum radius of the pendulum mass 12, and also the radius of the arc-shaped pendulum chamber 11a.
In the embodiment, the vibration component can inhibit the vibration displacement of the full rotating speed section of the washing drum 2 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 drum can play a good role in vibration absorption and does not generate resonance.
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 (12)
1. A laundry treatment apparatus, characterized by comprising a washing drum (2) and a plurality of vibration damping assemblies;
the washing cylinder (2) has a rotation center line;
the vibration damping assembly includes:
the base body (11), the base body (11) is provided with an arc swinging chamber (11 a), the arc swinging chamber (11 a) corresponds to the first circle center, and one side of the arc swinging chamber (11 a) is open;
the swinging mass body (12) is arranged in the arc swinging chamber (11 a) and can swing in an arc manner by taking the first circle center as the circle center;
a plurality of elastic bodies (13) arranged in the arc-shaped swing chamber (11 a); the elastic bodies (13) are arranged at the opposite ends of the swinging mass body (12) along the swinging direction;
a stopper (14) connected to the seat (11), the stopper (14) at least partially shielding the opening of the arc-shaped swing chamber (11 a) to define the swing mass (12) within the arc-shaped swing chamber (11 a);
the vibration reduction assemblies are arranged at intervals along the circumferential direction of the washing cylinder (2), the seat body (11) is fixedly connected with the washing cylinder (2), and the first circle center and the rotation center line are eccentrically arranged;
the washing cylinder (2) comprises a cylinder body (21) and a front end cover (22) arranged on the front side of the cylinder body (21), and a plurality of vibration reduction assemblies are arranged on the front end cover (22);
the front end cover (22) comprises a circular plate (221), an inner ring rib (222), an outer ring rib (223) and a plurality of reinforcing ribs (224), wherein the inner ring rib (222) surrounds the inner side edge of the circular plate (221) along the radial direction, the outer ring rib (223) surrounds the outer side edge of the circular plate (221) along the radial direction, the circular plate (221), the inner ring rib (222) and the outer ring rib (223) are jointly surrounded to form a circular groove, and the reinforcing ribs (224) are connected between the inner ring rib (222) and the outer ring rib (223) so as to divide the circular groove into a plurality of sub grooves (22 a); the vibration reduction assembly comprises a connecting plate (15) connected with the base body (11), the connecting plate (15) is located in the sub-groove (22 a), and the connecting plate (15) is overlapped with the annular plate (221) and fixedly connected.
2. Laundry treatment apparatus according to claim 1, characterized in that the stopper (14) closes the opening of the arc-shaped swing chamber (11 a) so that the arc-shaped swing chamber (11 a) becomes a closed space.
3. Laundry treatment apparatus according to claim 2, characterized in that the oscillating mass (12) is a metal piece, the seat (11) is a metal piece, and the arc-shaped oscillating chamber (11 a) is filled with grease.
4. Laundry treatment apparatus according to claim 1, characterized in that the oscillating mass (12) has a sector-like shape, the radially inner and radially outer surfaces of the oscillating mass (12) being in sliding contact with the corresponding wall surface of the arcuate oscillating chamber (11 a).
5. Laundry treatment apparatus according to claim 4, characterized in that the oscillating mass (12) is provided with a first bead (121) along a radially inner surface; and/or the surface of the swinging mass body (12) on the radial outer side is provided with a second convex rib (122).
6. Laundry treatment apparatus according to claim 1, characterized in that said elastomer (13) is a rebound pad made of flexible material; along the swinging direction of the swinging mass body (12), one side of the rebound pad is contacted with the wall surface of the arc swinging chamber (11 a), and the other side of the rebound pad is contacted with the swinging mass body (12).
7. Laundry treatment apparatus according to claim 1, characterized in that the damping assembly comprises a connection plate (15) connected to the seat (11), the connection plate (15) being provided with mounting holes (15 a), the damping assembly being connected to other mounting structures through the connection plate (15).
8. Laundry treatment apparatus according to claim 7, characterized in that the seat (11) is curved towards the first centre of a circle, the connection plate (15) and the first centre of a circle being located on the concave side of the seat (11), the connection plate (15) being parallel to the plane of the oscillation trajectory of the oscillating mass (12).
9. Laundry treatment apparatus according to any one of claims 1-6, characterized in that the vibration damping assembly is arranged at the rear side of the front end cap (22) towards the drum (21) and within the drum (21).
10. Laundry treatment apparatus according to claim 9, characterized in that the peripheral edge of the connection plate (15) is in contact with the corresponding inner wall of the sub-slot (22 a).
11. Laundry treatment apparatus according to claim 9, characterized in that the outer surface of the seat (11) along the radial direction of the washing drum (2) abuts against the inner surface of the drum body (21).
12. Laundry treatment apparatus according to claim 11, characterized in that the surface of the seat (11) radially outside the washing drum (2) is a circular arc surface (114), the circular arc surface (114) being conformed to the inner surface of the drum (21).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010990262.2A CN114197165B (en) | 2020-09-18 | 2020-09-18 | Vibration damping assembly and clothes treatment equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010990262.2A CN114197165B (en) | 2020-09-18 | 2020-09-18 | Vibration damping assembly and clothes treatment equipment |
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| CN114197165B true CN114197165B (en) | 2023-12-19 |
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| CN106062416A (en) * | 2014-03-31 | 2016-10-26 | 爱信艾达株式会社 | Centrifugal-pendulum-type vibration absorption device and method for designing same |
| CN106151367A (en) * | 2015-05-11 | 2016-11-23 | 现代自动车株式会社 | Damper of vehicle |
| CN106989138A (en) * | 2015-10-23 | 2017-07-28 | 丰田自动车株式会社 | Vibration absorber |
| CN208649704U (en) * | 2018-07-19 | 2019-03-26 | 江阴远望离合器有限公司 | Dehydrating vessel in washing machine with balancing device |
| CN109642638A (en) * | 2016-09-09 | 2019-04-16 | 爱信艾达株式会社 | Arrangement for damping oscillations |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106062416A (en) * | 2014-03-31 | 2016-10-26 | 爱信艾达株式会社 | Centrifugal-pendulum-type vibration absorption device and method for designing same |
| CN106151367A (en) * | 2015-05-11 | 2016-11-23 | 现代自动车株式会社 | Damper of vehicle |
| CN106989138A (en) * | 2015-10-23 | 2017-07-28 | 丰田自动车株式会社 | Vibration absorber |
| CN109642638A (en) * | 2016-09-09 | 2019-04-16 | 爱信艾达株式会社 | Arrangement for damping oscillations |
| CN208649704U (en) * | 2018-07-19 | 2019-03-26 | 江阴远望离合器有限公司 | Dehydrating vessel in washing machine with balancing device |
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