CN110319137A - The damping device and clothes treatment device of adaptive damping - Google Patents
The damping device and clothes treatment device of adaptive damping Download PDFInfo
- Publication number
- CN110319137A CN110319137A CN201810277654.7A CN201810277654A CN110319137A CN 110319137 A CN110319137 A CN 110319137A CN 201810277654 A CN201810277654 A CN 201810277654A CN 110319137 A CN110319137 A CN 110319137A
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- China
- Prior art keywords
- damping
- sleeve
- piston
- damping device
- piston rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
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- 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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3214—Constructional features of pistons
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- 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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3235—Constructional features of cylinders
-
- 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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention belongs to cushion technique fields, specifically provide the damping device and clothes treatment device of a kind of adaptive damping.Present invention seek to address that the problem of damping device of existing not variable damping cannot carry out damping to vibration by a relatively large margin well in shock absorbing process.Thus, damping device of the invention includes sleeve and the piston component that is arranged in sleeve, the inner wall of piston component and sleeve is in gap setting, and is filled in sleeve equipped with damping liquid, and the damping of liquid application can be damped when moving in sleeve so as to piston component；The inner wall of sleeve is set as variable-diameter structure, when so that piston component is mobile relative to sleeve, damping liquid can apply variable damping to piston component, to enable damping device to cope with different degrees of vibration with the damping of variation, and then dramatically improve the damping effect of damping device.In addition, the clothes treatment device includes damping device of the invention the present invention also provides a kind of clothes treatment device.
Description
Technical field
The invention belongs to cushion technique fields, specifically provide the damping device and clothes treatment device of a kind of adaptive damping.
Background technique
With the continuous development of science and technology, user starts to propose the comprehensive performance of mechanical device higher and higher want
It asks.By taking the damping performance of mechanical device as an example, the damping damping that traditional dampening assembly provides in shock absorbing process is to protect always
It holds constant；That is, existing dampening assembly still can only be with constant when generating variation by the vibration amplitude of damping device
Cushioning ability damping is carried out to it, when larger by the vibration amplitude of damping device, the damping modes of this not variable damping are very
Obviously just it is difficult to reach ideal damping effect.
Correspondingly, this field needs a kind of damping device of new adaptive damping to solve in the prior art above-mentioned ask
Topic.
Summary of the invention
In order to solve the above problem in the prior art, in order to solve the damping device of existing not variable damping in damping
The problem of cannot carrying out damping to vibration by a relatively large margin well in journey, the present invention provides a kind of damping of adaptive damping dresses
It sets, the damping device includes sleeve and the piston component that is arranged in the sleeve, the piston component and the sleeve
Inner wall be in gap setting, and fill in the sleeve equipped with damping liquid；The inner wall of the sleeve is set as variable-diameter structure, makes
When obtaining the piston component relative to sleeve movement, damping liquid can apply variable damping to the piston component.
In the optimal technical scheme of the damping device of above-mentioned adaptive damping, the piston component include piston and with institute
The connected piston rod of piston is stated, the piston is arranged in the sleeve and with the inner wall of the sleeve in gap setting.
In the optimal technical scheme of the damping device of above-mentioned adaptive damping, the damping device further includes being arranged described
Elastic component in sleeve, the elastic component are set on the piston rod.
In the optimal technical scheme of the damping device of above-mentioned adaptive damping, the elastic component is to be sheathed on the piston
Spring on bar, the spring are arranged between the piston and the inner wall of the sleeve.
In the optimal technical scheme of the damping device of above-mentioned adaptive damping, the spring be fixedly connected with the piston or
Person's setting is integrated.
In the optimal technical scheme of the damping device of above-mentioned adaptive damping, one end of the piston rod and the piston phase
Even, the other end of the piston rod stretches out outside the sleeve.
In the optimal technical scheme of the damping device of above-mentioned adaptive damping, it is arranged between the piston rod and the sleeve
There is containment member, the containment member is for preventing damping liquid from revealing from the sleeve.
In the optimal technical scheme of the damping device of above-mentioned adaptive damping, the damping liquid is damping oil.
In the optimal technical scheme of the damping device of above-mentioned adaptive damping, the internal diameter of the sleeve is along the piston rod quilt
The direction of pulling is gradually reduced.
The present invention also provides a kind of clothes treatment device, the clothes treatment device includes any of the above-described optimization technique
Damping device described in scheme.
It will be appreciated to those of skill in the art that in the preferred technical solution of the present invention, damping device of the invention
Including sleeve and the piston component being arranged in the sleeve, the inner wall of the piston component and the sleeve is set in gap
It sets, and is filled in the sleeve equipped with damping liquid, can be hindered when being moved in the sleeve so as to the piston component
The damping that Buddhist nun's liquid applies；Meanwhile the inner wall of the sleeve is set as variable-diameter structure, so that the piston component is relative to described
When sleeve is mobile, damping liquid can apply variable damping to the piston component, to enable the damping device
Different degrees of vibration is coped with the damping of variation, and then dramatically improves the damping effect of the damping device.
Detailed description of the invention
Fig. 1 is the overall structure cross-sectional view of the damping device of adaptive damping of the invention.
Detailed description of the invention: 11, sleeve；12, piston；13, piston rod；14, spring；15, oil sealing；16, it links up with.
Specific embodiment
The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this
A little embodiments are used only for explaining technical principle of the invention, it is not intended that limit the scope of the invention.This field skill
Art personnel, which can according to need, makes adjustment to it, to adapt to specific application.For example, although being to combine in specification
The case where when damping device of the invention is for roller washing machine, still, damping device of the invention was obvious come what is be described
It can be also used for other clothes treatment devices, even other machinery settings.The change of this application is without departing from this hair
Bright basic principle, therefore will fall within the scope of protection of the present invention.
It should be noted that in the description of the present invention, term " on ", "lower", "vertical", "horizontal", "inner", "outside" etc.
The direction of instruction or the term of positional relationship are direction based on the figure or positional relationship, this, which is intended merely to facilitate, retouches
It states, rather than indication or suggestion described device or element must have a particular orientation, be constructed and operated in a specific orientation, because
This is not considered as limiting the invention.
In addition it is also necessary to explanation, in the description of the present invention unless specifically defined or limited otherwise, term " peace
Dress ", " connected ", " connection ", " cooperation " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection,
Or it is integrally connected；It can be directly connected, the company inside two elements can also be can be indirectly connected through an intermediary
It is logical.To those skilled in the art, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
Damping device based on the existing not variable damping proposed in background technique in shock absorbing process cannot well to compared with
Significantly vibration carries out the problem of damping；In order to solve the above problem in the prior art, it is variable that the present invention provides one kind
The damping device of damping.The damping device includes sleeve and the piston component that is arranged in the sleeve, the piston group
The inner wall of part and the sleeve is in gap setting, and is filled in the sleeve equipped with damping liquid, so that the piston component exists
The damping of liquid application can be damped when moving in the sleeve；Meanwhile the inner wall of the sleeve is set as variable-diameter structure,
When so that the piston component is mobile relative to the sleeve, damping liquid can apply variable resistance to the piston component
Buddhist nun to enable the damping device to cope with different degrees of vibration with the damping of variation, and then dramatically improves
The damping effect of the damping device.
It should be noted that the cylindric washer that existing roller washing machine generally includes cabinet and is arranged in the cabinet,
And it is attached between the cylindric washer and the cabinet by multiple damping devices.Existing roller washing machine is arranged described
Damping device on the upside of cylindric washer is usually all the spring vibration damper of not variable damping, when the cylindric washer since load bias is asked
When inscribing and generating strenuous vibration, the spring vibration damper of existing not variable damping does not simply fail to effectively play cushioning effect, instead also
It is possible that the seismism of cylindric washer can be aggravated.Therefore, by the present invention in that replacing not variable resistance with the dampening assembly of adaptive damping
The spring vibration-damping component of Buddhist nun effectively solves the above problems；Specifically, when cylindric washer generates vibration, the damping device energy
Enough vibrations that corresponding damping is provided and copes with different amplitudes, to effectively improve the damping effect of the damping device.
Referring next to Fig. 1, which is the overall structure cross-sectional view of the damping device of adaptive damping of the invention.Such as Fig. 1 institute
Show, damping device of the invention includes sleeve 11 and the piston being arranged in sleeve 11 12 and piston rod 13；Wherein, piston rod
13 upper end is connected with piston 12, and the lower end of sleeve 11 is provided with through-hole, and set is stretched out by the through-hole in the lower end of piston rod 13
Outside cylinder 11, so that piston rod 13 can be connected in sleeve 11 by the through-hole with slidable connection type, and drive
Piston 12 moves back and forth.Meanwhile the inner wall of piston 12 and sleeve 11 is in gap setting, and fills in sleeve 11 and be equipped with damping
Liquid, when cylindric washer generates vibration during the work time, the cylindric washer can push and pull piston rod 13 repeatedly, so that piston 12 exists
Reciprocating motion is generated in sleeve 11；At this point, damping liquid can be continuously applied to damp to piston 12, to reach cushioning effect.
It will be appreciated to those of skill in the art that although piston component described in this preferred embodiment includes piston 12
And the piston rod 13 being connected with piston 12, still, technical staff obviously can also be according to actual use demand by the piston
Piston 12 and piston rod 13 setting of component are integrated, as long as the cylindric washer generates vibration, piston 12 can be in sleeve 11
Middle reciprocating motion.It is also desirable to explanation, although sleeve 11 is generally shaped like described in this preferred embodiment
Cylindrical shape, the shape of piston 12 be it is cylindric, still, technical staff obviously can also be according to actual use demand voluntarily adjusting sleeve
The concrete shape of cylinder 11 and piston 12.
As shown in Figure 1, the inner wall of sleeve 11 is variable-diameter structure, and the internal diameter of sleeve 11 is along the side that piston rod 13 is pulled
To being gradually reduced.Damping device of the invention realizes the effect of variable damping by this variable-diameter structure, specifically, due to washing
Push-and-pull effect can be caused to piston rod 13 by washing when cylinder generates vibration, and the push-and-pull of piston rod 13 movement will drive piston 12
It moves back and forth.For when piston 12 moves downward, due to damping liquid viscosity with higher itself, when piston 12 is transported downwards
When the trend that dynamic or generation moves downward, the damping liquid positioned at 12 lower section of piston can apply piston 12 to prevent to flow
Add a upward thrust, to reach damping effect.Simultaneously, it should be noted that living due to the viscosity property of damping liquid
The pulling force that stopper rod 13 applies piston 12 is bigger, and damping liquid is also bigger for the resistance resisting flowing and generating；In other words,
When cylindric washer generates vibration by a relatively large margin suddenly, cylindric washer applies biggish pulling force to piston 12, at this point, being located at piston 12
The damping liquid of lower section also can generate bigger thrust to piston 12, described to subtract so as to when cylindric washer vibration amplitude is larger
Shake device is still able to keep good damping effect.
Further, since the inner wall of sleeve 11 is set as variable-diameter structure, piston 12 moves more down, piston 12 and set
Cylinder 11 between gap with regard to smaller, damping liquid pass through the gap when to piston 12 generate thrust it is also bigger, play
Cushioning effect is also stronger.In other words, the damping device can shake the different of degree according to cylindric washer and apply not to piston
Same damping is still able to so that the damping device is effectively ensured in the case where cylindric washer generates strenuous vibration to cylindric washer
Good cushioning effect is played, and then effectively improves the damping effect of the washing machine.Skilled artisans appreciate that
It is that the damping liquid that technical staff can voluntarily select different viscositys according to actual use demand in the preferred embodiment can
To select damping oil that can meet damping requirement as damping liquid；Certainly, technical staff can also select other damping liquids, with
Just the damping device is enabled to better adapt to the different shock conditions by damping device.
It should be noted that, although the internal diameter of middle sleeve 11 of the present invention is that the direction being pulled along piston rod 13 is gradually reduced
, still, technical staff obviously can also voluntarily adjust the inner wall shape of sleeve 11 according to actual use demand, as long as by sleeve
11 inner wall is arranged to variable-diameter structure, when so that piston 12 is mobile relative to sleeve 11, fills the damping liquid energy set in sleeve 11
It is enough to apply variable damping to piston 12.In addition it is also necessary to explanation, the present invention not to the outer wall shape of sleeve 11 with
And the shape of piston 12 imposes any restrictions, technical staff can be according to actual product demand sets itself.
Referring next to Fig. 1, further, in a preferred embodiment of the invention, the damping device further includes that setting exists
Spring 14 in sleeve 11, and spring 14 is arranged between piston 12 and the inner wall of sleeve 11, when piston rod 13 is with piston 12
When moving downward, piston 12 can squeeze spring 14, and spring 14 generates compressional deformation and generates upward push away to piston 12 instead
Power, to play cushioning effect.It will be appreciated to those of skill in the art that although the spring 14 in this preferred embodiment is arranged
In the outside of piston rod 13, still, spring 14 obviously also be can be set in the inside of piston rod 13, or only with piston rod 13
A part is fixedly connected, or even can also be arranged with piston 12 and be integrated, as long as piston 12 can make bullet when generating reciprocating motion
Spring 14 generates deformation.Although in addition, elastic component described in this optimal technical scheme be spring, technical staff
Obviously other elastic components, such as elastomer block etc. can also be selected.
It should be noted that in the preferred embodiment, the damping that the damping device provides mainly includes two parts, one
Part is the deformation that spring 14 provides, and another part is the variable damping that damping liquid provides.Or it is transported downwards with piston 12
For when dynamic, when piston 12 moves downward, on the one hand, piston 12 squeezes spring 14 and generates compressive deformation, so as to cause spring
14 generate a upward elastic force, and then play cushioning effect；On the other hand, piston 12 is located at during moving downward
The damping liquid of 12 lower section of piston can apply a upward thrust, and 13 pairs of work of piston rod to prevent to flow to piston 12
The pulling force that plug 12 applies is bigger, and damping liquid is also bigger for the resistance resisting flowing and generating, to realize variable damping
Effect, so that damping effect obtains further effective guarantee.In other words, damping device of the invention is by setting piston 12
It is equipped with and is moved in the sleeve 11 of variable-diameter structure and sheathed spring 14 realizes the effect of variable damping on piston rod 13, with toilet
The cylindric washer with different shock conditions can effectively be adapted to by stating damping device, to effectively avoid the damping of existing not variable damping
The problem of device cannot carry out damping to vibration by a relatively large margin well in shock absorbing process, and then dramatically improve institute
State the damping effect of damping device.
Referring next to Fig. 1, in the preferred embodiment, the upper end of sleeve 11 is provided with hook 16, and piston rod 13
Lower section is also connected with hook 16, by the way that two hooks 16 are respectively connected on the cabinet and cylindric washer of the washing machine, so that
The damping device can effectively buffer the vibration that cylindric washer generates in washing process.It is understood that although this is preferably
Damping device as described in the examples is connected on the washing machine by two hooks 16, and still, technical staff is obvious
Other connecting elements can also be used, as long as cylindric washer generates vibration, piston rod 13 is able to drive piston 12 and moves back and forth
Effective damping.In addition, the damping device further includes oil sealing 15, oil sealing 15 is arranged between piston rod 13 and sleeve 11,
Effectively to prevent damping liquid from leaking from sleeve 11, so that the sealing effect in sleeve 11 be effectively ensured, and then effectively protect
Demonstrate,prove the damping effect of the damping device.Although it will be appreciated to those of skill in the art that described in this preferred embodiment
The oil sealing 15 that containment member uses, still, technical staff obviously can also voluntarily select other sealings according to actual product demand
Component, as long as the damping liquid in sleeve 11 will not flow out.
Finally, it should be noted that a kind of clothes treatment device, the clothes treatment device packet is also claimed in the present invention
Include damping device described in above-mentioned optimal technical scheme.
So far, it has been combined attached drawing and describes technical solution of the present invention, still, skilled addressee readily understands that
It is that protection scope of the present invention is expressly not limited to these specific embodiments.Under the premise of without departing from the principle of the present invention,
Those skilled in the art can make equivalent change or replacement to the relevant technologies feature, the technology after these changes or replacement
Scheme will fall within the scope of protection of the present invention.
Claims (10)
1. a kind of damping device of adaptive damping, which is characterized in that the damping device includes sleeve and is arranged in the set
The inner wall of piston component in cylinder, the piston component and the sleeve is in gap setting, and fills in the sleeve and be equipped with resistance
Buddhist nun's liquid；
The inner wall of the sleeve is set as variable-diameter structure, when so that the piston component is mobile relative to the sleeve, damping fluid
Body can apply variable damping to the piston component.
2. damping device according to claim 1, which is characterized in that the piston component include piston and with the work
The connected piston rod of plug, the piston are arranged in the sleeve and with the inner wall of the sleeve in gap setting.
3. damping device according to claim 2, which is characterized in that the damping device further includes being arranged in the sleeve
In elastic component, the elastic component is set on the piston rod.
4. damping device according to claim 3, which is characterized in that the elastic component is to be sheathed on the piston rod
Spring, the spring is arranged between the piston and the inner wall of the sleeve.
5. damping device according to claim 4, which is characterized in that the spring is fixedly connected or sets with the piston
It sets as one.
6. damping device according to claim 2, which is characterized in that one end of the piston rod is connected with the piston,
The other end of the piston rod stretches out outside the sleeve.
7. damping device according to claim 6, which is characterized in that be provided between the piston rod and the sleeve close
Component is sealed, the containment member is for preventing damping liquid from revealing from the sleeve.
8. damping device according to claim 1, which is characterized in that the damping liquid is damping oil.
9. the damping device according to any one of claim 2 to 8, which is characterized in that the internal diameter of the sleeve is described in
The direction that piston rod is pulled is gradually reduced.
10. a kind of clothes treatment device, which is characterized in that the clothes treatment device includes any one of claims 1 to 9 institute
The damping device stated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810277654.7A CN110319137A (en) | 2018-03-30 | 2018-03-30 | The damping device and clothes treatment device of adaptive damping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810277654.7A CN110319137A (en) | 2018-03-30 | 2018-03-30 | The damping device and clothes treatment device of adaptive damping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110319137A true CN110319137A (en) | 2019-10-11 |
Family
ID=68111819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810277654.7A Pending CN110319137A (en) | 2018-03-30 | 2018-03-30 | The damping device and clothes treatment device of adaptive damping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110319137A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202786812U (en) * | 2012-07-21 | 2013-03-13 | 海尔集团公司 | Washing machine and vibration reduction component for same |
| CN203546437U (en) * | 2013-11-08 | 2014-04-16 | 合肥美的洗衣机有限公司 | Combined type damping suspender for pulsator washing machine |
| CN203559267U (en) * | 2013-10-10 | 2014-04-23 | 合肥荣事达三洋电器股份有限公司 | Vibration damping device for washing machine |
| CN106930047A (en) * | 2015-12-30 | 2017-07-07 | 合肥海尔洗衣机有限公司 | A kind of washing machine mutative damp vibration absorber and washing machine |
| CN206591301U (en) * | 2016-12-26 | 2017-10-27 | 青岛海尔智能技术研发有限公司 | Rotary drum washing machine and its hanger rod component |
-
2018
- 2018-03-30 CN CN201810277654.7A patent/CN110319137A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202786812U (en) * | 2012-07-21 | 2013-03-13 | 海尔集团公司 | Washing machine and vibration reduction component for same |
| CN203559267U (en) * | 2013-10-10 | 2014-04-23 | 合肥荣事达三洋电器股份有限公司 | Vibration damping device for washing machine |
| CN203546437U (en) * | 2013-11-08 | 2014-04-16 | 合肥美的洗衣机有限公司 | Combined type damping suspender for pulsator washing machine |
| CN106930047A (en) * | 2015-12-30 | 2017-07-07 | 合肥海尔洗衣机有限公司 | A kind of washing machine mutative damp vibration absorber and washing machine |
| CN206591301U (en) * | 2016-12-26 | 2017-10-27 | 青岛海尔智能技术研发有限公司 | Rotary drum washing machine and its hanger rod component |
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Application publication date: 20191011 |
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