CN109385820B - Damper for laundry treating apparatus and laundry treating apparatus - Google Patents
Damper for laundry treating apparatus and laundry treating apparatus Download PDFInfo
- Publication number
- CN109385820B CN109385820B CN201710662510.9A CN201710662510A CN109385820B CN 109385820 B CN109385820 B CN 109385820B CN 201710662510 A CN201710662510 A CN 201710662510A CN 109385820 B CN109385820 B CN 109385820B
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- chamber
- plunger
- shock absorber
- damping
- damper
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- 238000013016 damping Methods 0.000 claims abstract description 74
- 230000035939 shock Effects 0.000 claims abstract description 66
- 239000006096 absorbing agent Substances 0.000 claims abstract description 55
- 238000005406 washing Methods 0.000 claims abstract description 44
- 239000007788 liquid Substances 0.000 claims description 28
- 239000012530 fluid Substances 0.000 claims description 15
- 239000013013 elastic material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 239000010720 hydraulic oil Substances 0.000 description 12
- 230000033001 locomotion Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
Images
Classifications
-
- 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
- D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal axis
- D06F37/225—Damping vibrations by displacing, supplying or ejecting a material, e.g. liquid, into or from counterbalancing pockets
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
Abstract
The invention relates to the technical field of washing machines, in particular to a shock absorber for a clothes treatment device and the clothes treatment device. The invention aims to solve the problems that the damping force of the shock absorber in the prior art is not variable, and the shock absorption effect is poor due to the failure of the shock absorber. To this end, the shock absorber of the present invention comprises a sleeve having a first chamber; a plunger having a second chamber, the plunger being slidably inserted into the first chamber; the first chamber is also provided with a throttling piece, the throttling piece is provided with a plurality of damping holes, a part of the plurality of damping holes is in an opening/closing state along with the sliding of the plunger, and the first chamber and the second chamber are communicated with each other through the damping holes in the opening state. The damping force provided by the shock absorber is variable through the arrangement of the throttling element, namely, a part of the damping holes is in an opening/closing state along with the sliding of the plunger, so that the shock absorber can be popularized and used in a large scale.
Description
Technical Field
The invention relates to the technical field of clothes treatment, in particular to a shock absorber for a clothes treatment device and the clothes treatment device.
Background
The washing machine is a clean electrical appliance for washing clothes by using electric energy, and becomes an essential household electrical appliance in daily life with the acceleration of life rhythm and high requirements of people on living comfort. However, the washing machine generates great vibration and noise during washing, rinsing and dehydrating processes, causing some inconvenience to the normal life of people.
In order to solve the problem of excessive vibration and noise during the operation of the washing machine, the utility model patent application with publication number CN201310034Y discloses a shock absorber for a drum washing machine. Specifically, the shock absorber of the drum washing machine comprises a guide damping cylinder, a friction ring and a plunger assembly, wherein the plunger assembly consists of a plunger pipe and a joint, the joint is fixed at the upper end of the plunger pipe, the plunger assembly is inserted into the damping cylinder, and the friction ring is arranged between the damping cylinder and the plunger pipe. The damping cylinder is also provided with a damping retaining ring for retaining the friction ring in the damping cylinder, and the damping retaining ring is fixed with the damping cylinder through threads. The shock absorber mainly achieves the purpose of reducing the vibration of the washing machine through the friction force generated by the friction between the plunger piston combination and the friction ring in the reciprocating motion process of the damping cylinder. However, when the plunger assembly reciprocates in the damper cylinder, the frictional force generated by the damper is constant regardless of the amplitude of the washing machine. Therefore, the shock absorber of the drum washing machine cannot enhance the damping force generated by the shock absorber according to the increase of the motion stroke of the piston combination relative to the damping cylinder, and particularly has poor shock absorption effect on severe shock.
In addition, in CN 201310034Y's bumper shock absorber, mainly by the frictional force that plunger combination and friction ring friction produced shock attenuation, after using for a period of time, frictional force can reduce because of the wearing and tearing of friction ring, and then the bumper shock absorber became invalid gradually, leads to washing machine's noise and vibrations bigger and bigger, influences user's use experience.
Accordingly, there is a need in the art for a new shock absorber that solves the above problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problems that the damping force of the conventional damper is not variable during the operation and the damper is easily disabled due to the abrasion of the friction ring, the present invention provides a damper for a laundry treating apparatus, including a sleeve having a first chamber; a plunger having a second chamber, the plunger slidably inserted into the first chamber; the first chamber is also provided with a throttling piece, the throttling piece is provided with a plurality of damping holes, a part of the plurality of damping holes is in an opening/closing state along with the sliding of the plunger, and the first chamber and the second chamber are communicated with each other through the damping holes in the opening state.
In a preferred technical scheme of the shock absorber, a liquid bag is arranged in the first chamber, an open end of the liquid bag is fixedly connected with the plunger, fluid is filled in an inner cavity of the liquid bag and/or the second chamber, and the throttling element is arranged in the liquid bag.
In a preferred technical solution of the above shock absorber, the throttling element includes a base and a tube structure integrally formed or fixedly connected with the base, the base is disposed at an end of the liquid bag away from the plunger, and the tube structure is inserted into the second chamber.
In a preferred embodiment of the shock absorber, the damping holes are disposed on an outer wall of the tube structure along an axial direction of the tube structure.
In a preferred embodiment of the shock absorber, an angle is formed between an axis of each damping hole and an axis of the tube structure.
In a preferred technical scheme of the shock absorber, the included angle is 90 degrees.
In a preferred embodiment of the above shock absorber, a circumferential outer edge of the base is matched with an inner wall of the first chamber.
In a preferred technical solution of the above shock absorber, the liquid bag is made of an elastic material.
In a preferred solution of the above shock absorber, the sleeve has a first fixing portion at an end remote from the first chamber, and/or the plunger has a second fixing portion at an end remote from the second chamber, the first and second fixing portions being for connecting the shock absorber to an external structure.
The invention also provides a clothes treatment device, which comprises a shell and a washing drum arranged in the shell, wherein the washing drum is supported in the shell through a plurality of shock absorbers, and at least one of the shock absorbers is the shock absorber in any one of the above aspects.
As can be understood by those skilled in the art, in a preferred embodiment of the present invention, a damper for a laundry treating apparatus includes a sleeve having a first chamber; a plunger having a second chamber, the plunger being slidably inserted into the first chamber; a liquid sac is arranged in the first chamber, the open end of the liquid sac is fixedly connected with the plunger, and fluid is filled in the inner cavity of the liquid sac and/or the second chamber. The liquid bag is also internally provided with a throttling piece, the throttling piece comprises a bottom plate and a pipe structure, and the pipe structure is inserted into the second chamber. The tube structure is provided with a plurality of damping holes, a part of the plurality of damping holes is in an open/close state along with the sliding of the plunger, and the liquid sac and the second chamber are communicated with each other by means of the damping holes in the open state.
Through the arrangement of the throttling element, the number of the damping holes in the opening state is correspondingly changed along with the change of the stroke of the plunger in the sleeve, and further the damping force is correspondingly changed. Specifically, when the plunger performs a compression movement, the fluid in the sac flows to the second chamber, and the damping holes in the opened state are fewer and fewer, so that the difficulty of the fluid entering the second chamber is gradually increased, and the fluid in the first chamber needs a larger force to enter the second chamber, so that the damping force generated by the shock absorber is larger. When the plunger does stretching movement, the fluid in the second chamber flows into the liquid bag, and meanwhile, the damping holes in the opening state are more and more, so that the difficulty of the fluid entering the liquid bag through the damping holes is gradually reduced, the fluid in the second chamber is rapidly reduced, the negative pressure in the second chamber is increased, and the damping force applied to the fluid in the second chamber entering the liquid bag is increased. Therefore, in the shock absorber of the present invention, as the stroke of the plunger in the sleeve increases, the damping force to which the plunger is subjected increases. That is, the larger the vibration of the washing machine, the larger the damping force provided by the shock absorber, and compared with the existing damper for the washing machine, the damping force of the shock absorber of the present invention is variable, and the shock absorber can be automatically adjusted according to the vibration frequency of the washing machine to form the damping force matched with the vibration, thereby reducing the vibration and noise.
Drawings
The damper for a laundry treating apparatus and the laundry treating apparatus of the present invention will be described with reference to the accompanying drawings in conjunction with a drum washing machine. In the drawings:
FIG. 1 is a schematic view illustrating an installation position of a damper for a drum washing machine according to the present invention;
FIG. 2 is a schematic external view of a damper for a drum washing machine according to the present invention;
fig. 3 is a cross-sectional view illustrating a damper for a drum washing machine according to the present invention.
List of reference numerals
1. A shock absorber; 11. a sleeve; 111. a first fixed part; 112. a first chamber; 12. a plunger; 121. a second fixed part; 122. a second chamber; 13. a throttle member; 131. a base; 132. a tube structure; 133. a damping hole; 14. a liquid sac; 2. a housing; 3. a drum; 4. and (5) hydraulic oil.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although described in the context of hydraulic oil, it is apparent that the invention may take the form of other fluids having a certain viscosity, provided that the fluid itself does not corrode the plunger and the sac.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring first to fig. 1, 2 and 3, wherein fig. 1 is a schematic view of an installation position of a damper for a drum washing machine according to the present invention; FIG. 2 is a schematic external view of a damper for a drum washing machine according to the present invention; fig. 3 is a cross-sectional view illustrating a damper for a drum washing machine according to the present invention.
As shown in fig. 1, the damper 1 for a drum washing machine of the present invention has one end connected to a casing 2 of the drum washing machine and the other end connected to the bottom of a drum 3, and when the drum 3 vibrates during operation, the damper 1 can support the drum 3 and dissipate the vibration energy generated from the drum 3. Specifically, as shown in fig. 2 and 3, the shock absorber 1 mainly includes a sleeve 11, a first fixing portion 111 fixedly connected to a first end of the sleeve 11 (a left end of the sleeve 11 shown in fig. 3), a plunger 12, and a second fixing portion 121 fixedly connected to a first end of the plunger 12 (a right end of the plunger 12 shown in fig. 3). Wherein the sleeve 11 has a first chamber 112 and the plunger 12 has a second chamber 122 disposed therein. In the assembled state, the second end of the plunger 12 (the left end of the plunger 12 shown in fig. 3) is slidably inserted into the first chamber 112 of the sleeve 11 from the second end of the sleeve 11 (the right end of the sleeve 11 shown in fig. 3). Preferably, the outer wall of the plunger 12 is slidably in close engagement with the inner wall of the sleeve 11. The first fixing portion 111 is for connection to the drum 3 of the washing machine, and the second fixing portion 121 is for connection to the housing 2 of the washing machine. Of course, it is understood that the first fixing portion 111 may be connected to the housing 2 of the washing machine and the second fixing portion 121 may be connected to the drum 3 of the washing machine.
Referring to fig. 3, a sac 14 is provided in the first chamber 112, and a throttle 13 is provided in the sac 14. The closed end of the sac 14 (the left end of the sac 14 shown in fig. 3) abuts in the first chamber 112 of the sleeve 11, preferably in fixed connection with the sleeve 11. The open end of the sac 14 (the right end of the sac 14 as viewed in fig. 3) is sealingly and tightly coupled to the second end of the plunger 12. The throttling element 13 comprises a base 131 and a tube structure 132 fixedly connected with the base 131, the base 131 is arranged at the closed end of the sac 14, and the tube structure 132 is inserted into the second chamber 122. The tube structure is provided with a plurality of damping holes 133, the inner cavity of the sac 14 and/or the second chamber 122 is filled with hydraulic oil 4, when the plunger 12 slides in the first chamber 112 of the sleeve 11, a part of the plurality of damping holes 133 is in an open/closed state, and the hydraulic oil 4 can flow in the sac 14 and the second chamber 122 to and fro through the damping holes 133 in the open state.
Preferably, the sac 14 is made of an elastic or flexible material, such as polyurethane, silicone, rubber, etc. The base 131 and the tube structure 132 are integrally formed, the cross section of each damping hole 133 is circular, the damping holes are arranged on the outer wall of the tube structure 132 along the axial direction of the tube structure 132, and an included angle is formed between the axis of each damping hole 133 and the axis of the tube structure 132. It is further preferred that the axis of the damping orifice 133 is at an angle of 90 deg. to the axis of the tube structure 132, i.e. the damping orifice 133 is arranged perpendicular to the tube structure 132. The outer edge of the base 131 in the circumferential direction matches with the inner wall of the first chamber 112, for example, the first chamber 112 is a cylindrical cavity, the base 131 is a cylindrical structure, and the diameter of the cross section of the cylindrical structure is approximately equal to the diameter of the cross section of the cylindrical cavity.
From the above description it can be seen that: on one hand, since the open end of the liquid bag 14 is fixedly connected with the plunger 12 and the closed end of the liquid bag 14 is fixedly connected with the sleeve 11, the plunger 12 can stretch or compress the liquid bag 14 in the reciprocating process of the plunger 12, and further, the liquid bag 14 can provide an elastic force, and the elastic force applied to the plunger 12 is increased along with the increase of the stroke of the plunger 12 deviating from the balance position in the sleeve 11, so that the damping effect of the shock absorber 1 is enhanced. More importantly, on the other hand, since the throttling element 13 is arranged in the liquid bag 14 and the pipe structure 132 of the throttling element 13 is inserted into the second chamber 122, the number of the damping holes 133 in the open state is changed at any time during the reciprocating motion of the plunger 12, and the damping force generated by the damping holes 133 is correspondingly changed, thereby further enhancing the shock absorbing effect of the shock absorber 1. Furthermore, since the sac 14 is provided in the first chamber 112 and one end of the sac 14 is sealingly connected to the plunger 12, the hydraulic oil 4 flows only between the sac 14 and the second chamber 122 during the sliding of the plunger 12 relative to the sleeve 11, avoiding the problem of the shock absorber 1 failing due to the leakage of the hydraulic oil 4. The circumferential outer edge of the base 131 is matched with the inner wall of the first chamber 112, and the base 131 can limit the horizontal position of the tube structure 132, so that the sliding between the plunger 12 and the throttling element 13 is smoother and more stable, and the occurrence of the failure of the shock absorber 1 caused by the offset phenomenon of the tube structure 132 of the throttling element 13 in the working process of the throttling element 13 is avoided.
In other words, compared with the existing shock absorber of the drum washing machine which utilizes friction force to absorb shock, the damping force generated by the shock absorber 1 of the invention is not constant damping force, but variable damping force which changes along with the amplitude of shock, that is, the larger the amplitude of shock of the washing machine is, the larger the damping force generated by the shock absorber 1 to resist the shock is, and the shock absorber 1 of the invention can not cause the failure of the shock absorber 1 after working for a period of time due to phenomena such as abrasion and the like, thereby solving the problem that the damping force is invariable in the prior art, greatly enhancing the shock absorption effect of the shock absorber, and greatly improving the user experience of using the drum washing machine by users.
It should be noted here that the number and diameter of the damping holes 133 are not limited in this embodiment, and the number and diameter of the damping holes 133 are different for different models of shock absorbers 1. For example, for a relatively small shock absorber 1, the diameter of the damping hole 133 may be in the thickness range of a few tenths of a millimeter to a few millimeters; whereas for a relatively large shock absorber 1, the diameter of the damping hole 133 may be in the thickness range of several millimeters to ten and several millimeters.
It will also be appreciated by those skilled in the art that the preferred arrangement of the damping holes 133 is merely illustrative of the principles of the present invention and is not intended to limit the scope of the invention, which can be modified in any manner by those skilled in the art to suit a more specific application without departing from the principles of the present invention. For example, the cross-section of the orifice 133 may also be elliptical or rectangular; the base 131 and the tube structure 132 can be fixedly connected in a threaded manner; the angle between the axis of the damping hole 133 and the axis of the tube structure 132 may be any angle, for example, the angle between the axis of the damping hole 133 and the axis of the tube structure 132 in the horizontal left direction is 45 °.
The operation of the damper for a drum washing machine according to the present invention will be briefly described with reference to fig. 3.
As shown in the orientation of fig. 3, when the plunger 12 is forced to slide leftward, the volume of the fluid bag 14 decreases, the damping hole 133 in the open state on the throttling element 13 decreases, the hydraulic oil 4 is squeezed, the inner cavity of the fluid bag 14 generates positive pressure, the pressure causes the hydraulic oil 4 to flow to the second chamber 122 through the damping hole 133 in the open state, and the hydraulic oil 4 generates a rightward damping force on the plunger 12 when flowing to the second chamber 122, so that the leftward movement of the plunger 12 is slowed down, and a shock absorption effect is achieved; when the plunger 12 is forced to slide rightwards, the volumes of the second chamber 122 and the liquid bag 14 are increased, the damping hole 133 in an open state on the throttling element 13 is increased, the hydraulic oil 4 is stretched, the inner cavity of the liquid bag 14 generates negative pressure, the negative pressure enables the hydraulic oil 4 to penetrate through the damping hole 133 to enter the inner cavity of the liquid bag 14, the hydraulic oil 4 generates leftward damping force on the plunger 12 when flowing to the inner cavity of the liquid bag 14, leftward movement of the plunger 12 is slowed down, and a damping effect is achieved.
Referring back to fig. 1, in another aspect of the present invention, there is provided a washing machine including a housing 2 and a drum 3 disposed in the housing 2, the drum 3 being supported on the housing 2 by two dampers 1, preferably, both dampers 1 are the aforementioned damper 1 for a drum washing machine of the present invention. Of course, the number of the dampers 1 in the drum washing machine is not constant, three, four or more dampers 1 may be provided in the drum washing machine, and at least one of the dampers 1 may be the damper 1 of the present invention.
In addition, it should be noted that although the above preferred embodiment is described by taking a drum washing machine as an example, this is not intended to limit the protection scope of the present invention, and it will be appreciated by those skilled in the art that the present invention can also be applied to other clothes treatment devices besides the drum washing machine, such as a pulsator washing machine, a clothes dryer, a shoe washing machine, and the like, which have the same or similar damping structure.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (9)
1. A damper for a laundry treating apparatus, comprising:
a sleeve having a first chamber;
a plunger having a second chamber, the plunger slidably inserted into the first chamber;
the plunger is characterized in that a throttling piece is further arranged in the first chamber, the throttling piece is provided with a plurality of damping holes, a part of the plurality of damping holes is in an opening/closing state along with the sliding of the plunger, and the first chamber and the second chamber are communicated with each other through the damping holes in the opening state;
the first chamber is internally provided with a liquid bag, the open end of the liquid bag is fixedly connected with the plunger, fluid is filled in the inner cavity of the liquid bag and/or the second chamber, and the throttling element is arranged in the liquid bag.
2. The shock absorber according to claim 1, wherein the throttle member comprises a base and a tube structure integrally formed or fixedly connected with the base, the base being disposed at an end of the sac remote from the plunger, the tube structure being inserted into the second chamber.
3. The shock absorber according to claim 2, wherein the plurality of damping holes are provided to an outer wall of the tube structure in an axial direction of the tube structure.
4. The shock absorber according to claim 3 wherein the axis of each orifice is angled with respect to the axis of the tube structure.
5. The damper of claim 4, wherein the included angle is 90 degrees.
6. The shock absorber according to any one of claims 2 to 5 wherein a circumferential outer edge of the seat matches an inner wall of the first chamber.
7. The shock absorber according to claim 1, wherein said fluid bladder is made of an elastic material.
8. The damper according to claim 1, characterized in that the sleeve has a first fixing portion at an end remote from the first chamber and/or the plunger has a second fixing portion at an end remote from the second chamber, the first and second fixing portions being used for connecting the damper to an external structure.
9. A laundry treatment apparatus comprising a casing and a washing drum disposed in the casing, the washing drum being supported in the casing by a plurality of shock absorbers, characterized in that at least one of the shock absorbers is a shock absorber according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710662510.9A CN109385820B (en) | 2017-08-04 | 2017-08-04 | Damper for laundry treating apparatus and laundry treating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710662510.9A CN109385820B (en) | 2017-08-04 | 2017-08-04 | Damper for laundry treating apparatus and laundry treating apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN109385820A CN109385820A (en) | 2019-02-26 |
| CN109385820B true CN109385820B (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710662510.9A Active CN109385820B (en) | 2017-08-04 | 2017-08-04 | Damper for laundry treating apparatus and laundry treating apparatus |
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| CN (1) | CN109385820B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663299B (en) * | 2019-03-06 | 2022-08-02 | 青岛海尔洗涤电器有限公司 | Variable damping shock absorber and clothes treatment equipment |
| CN111691132B (en) * | 2019-03-12 | 2023-02-17 | 青岛海尔洗衣机有限公司 | Damper and laundry treating apparatus |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0478273B1 (en) * | 1990-09-25 | 1998-01-07 | Bridgestone Corporation | Vibration damping device |
| CN102359529A (en) * | 2011-09-12 | 2012-02-22 | 吕再昌 | Piston type hydropneumatic buffer |
| CA2895345C (en) * | 2012-12-20 | 2020-06-30 | Gaudet Machine Works Inc. | Hydraulic damper |
| CN203189596U (en) * | 2013-04-02 | 2013-09-11 | 江苏昌力油缸有限公司 | Controllable reset damping oil cylinder |
| CN204780319U (en) * | 2015-06-30 | 2015-11-18 | 张志雄 | Squirrel -cage motor screw thread piston dry -cleaning cylinder of moving away to avoid possible earthquakes |
| CN106564456A (en) * | 2015-10-09 | 2017-04-19 | 宝应县宝鸿汽配厂 | Hydraulic buffer type bumper |
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Effective date of registration: 20211009 Address after: 266101 room 221, Sino German Ecological Park Management Committee, No. 2877, Tuanjie Road, Huangdao District, Qingdao, Shandong Province Applicant after: QINGDAO HAIER WASHING ELECTRIC APPLIANCES Co.,Ltd. Applicant after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, No. 1 Haier Road, Laoshan District, Qingdao, Shandong Applicant before: QINGDAO HAIER DRUM WASHING MACHINE Co.,Ltd. |
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