CN109385830B - Damper and laundry treating apparatus including the same - Google Patents
Damper and laundry treating apparatus including the same Download PDFInfo
- Publication number
- CN109385830B CN109385830B CN201710693933.7A CN201710693933A CN109385830B CN 109385830 B CN109385830 B CN 109385830B CN 201710693933 A CN201710693933 A CN 201710693933A CN 109385830 B CN109385830 B CN 109385830B
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- chamber
- shock absorber
- plunger
- tube structure
- sac
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- 238000013016 damping Methods 0.000 claims abstract description 84
- 230000035939 shock Effects 0.000 claims abstract description 72
- 239000006096 absorbing agent Substances 0.000 claims abstract description 71
- 238000005406 washing Methods 0.000 claims abstract description 54
- 239000007788 liquid Substances 0.000 claims abstract description 39
- 239000012530 fluid Substances 0.000 claims abstract description 22
- 238000004806 packaging method and process Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 20
- 238000012856 packing Methods 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 239000010720 hydraulic oil Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 13
- 230000001965 increasing effect Effects 0.000 description 12
- 230000033001 locomotion Effects 0.000 description 10
- 230000009467 reduction Effects 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000004323 axial length Effects 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression 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
- 238000003754 machining Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000006872 improvement Effects 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
- 238000005096 rolling process Methods 0.000 description 1
Images
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
- 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
-
- 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
Landscapes
- 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 and a washing machine comprising the same. The invention aims to solve the problems of invariable damping force, poor vibration damping effect and the like of the shock absorber in the prior art. 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 slidably inserted into the first chamber; the shock absorber further comprises a liquid bag and a packaging piece arranged in the second chamber, the liquid bag is arranged in the first chamber, the open end of the liquid bag is fixedly connected with the first end of the plunger through the packaging piece, and fluid is filled in the inner cavity of the liquid bag and/or the second chamber. Through the arrangement of the liquid bag and the packaging part, the high-precision flow of the fluid in the liquid bag between the first chamber and the second chamber is realized, so that the damping force generated by the shock absorber is ensured to be variable at any time and high in stability, and 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 and a clothes treatment device comprising the same.
Background
The washing machine is a clean electric appliance for washing clothes by using electric energy, and becomes an essential household appliance in daily life with the acceleration of life rhythm and the improvement of the requirement of people on the living comfort level. However, the washing machine generates significant 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 invention patent application with the publication number of CN105986407A discloses a shock absorber, a washing machine and a clothes dryer. The shock absorber comprises a sleeve with an opening at one end and a first plunger, one end of the first plunger is a fixed end, the other end of the first plunger is inserted into the sleeve from the opening of the sleeve and can slide along the sleeve, and a friction plate in friction fit with the first plunger is arranged between the first plunger and the sleeve; the sleeve is provided with an elastic part and a second friction sliding device which is connected with the elastic part and can slide in a friction mode relative to the sleeve, and when the first plunger moves relative to the sleeve to exceed a preset position, the first plunger is abutted against the second friction sliding device and compresses the elastic part. The damper mainly achieves the purpose of reducing the vibration of the washing machine through the friction force generated by the friction between the first plunger and the friction plate in the reciprocating motion process of the first plunger in the sleeve, and the friction force and the elastic force generated by pushing the second friction sliding device to compress the elastic part after the first plunger exceeds a preset position. However, when the first plunger reciprocates in the sleeve, the frictional force generated by the second friction sliding means and the elastic force generated by the elastic member intervene only when the first plunger makes a compressing motion with respect to the sleeve and exceeds a predetermined position, and when the predetermined position is not exceeded and the first plunger makes a stretching motion with respect to the sleeve, the frictional force generated is a constant force regardless of the amplitude of the washing machine. Therefore, the damping force generated by the shock absorber to reduce vibration cannot be adjusted at any time according to the increase of the movement stroke of the first piston relative to the sleeve, and the vibration damping effect is to be further improved.
In addition, after the shock absorber adopting the arrangement mode is used for a period of time, the friction force is reduced due to the abrasion of the friction plate and the second friction sliding device, and then the shock absorber gradually loses efficacy, so that the noise and the vibration of the washing machine are increased, and the use experience of a user is influenced.
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 of the prior art that the vibration damping effect is poor in the working process of the shock absorber, and the shock absorber is easy to fail due to the abrasion of the friction ring, the invention provides a shock absorber, which comprises: a sleeve having a first chamber; a plunger having a second chamber, the plunger slidably inserted into the first chamber; the shock absorber further comprises a liquid bag and a packaging piece arranged in the second chamber, the liquid bag is arranged in the first chamber, the open end of the liquid bag is fixedly connected with the first end of the plunger through the packaging piece, and fluid is filled in the inner cavity of the liquid bag and/or the second chamber.
By means of the arrangement of the encapsulation, the open end of the sac can be reliably fixed to the first end of the plunger, and during the process of flowing fluid between the sac and the second chamber, it is ensured that the fluid does not leak at the open end of the sac.
In a preferred embodiment of the shock absorber, a throttle member is disposed in the fluid bag, the throttle member includes a tube structure, a portion of the tube structure is inserted into the second chamber, and the package member is disposed between the tube structure and the plunger, wherein the throttle member has a plurality of damping holes, a portion of the plurality of damping holes is in an open/closed state 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 open state.
Through the setting of fluid bag and dispose the throttling element in the fluid bag, when the plunger moved left and made first cavity produce the malleation, the quantity that is used for communicating the damping hole of fluid bag and second cavity reduces gradually to make the fluid pass through the damping hole and enter into the degree of difficulty in the second cavity more and more, the damping force of producing oil is more and more high, and the degree of difficulty of eliminating the fluid bag malleation is more and more big, thereby the damping force that the plunger received is also big more. When the plunger moves rightwards to enable the first chamber to generate negative pressure, the number of the damping holes for communicating the liquid bag and the second chamber is gradually increased, so that the difficulty of fluid entering the liquid bag through the damping holes is increased, the damping force of oil outlet is increased, the difficulty of eliminating the negative pressure of the liquid bag is increased, and the damping force applied to the plunger is increased. Therefore, in the shock absorber of the invention, as the stroke of the plunger in the sleeve is increased, the damping force of the oil outlet is gradually increased, and the damping force of the shock absorber is increased, thereby effectively reducing the vibration and the noise of the washing machine. That is to say, the bigger the vibration of the washing machine is, the bigger the stroke of the plunger in the sleeve is, the damping force of the oil can be improved, and the damping force provided by the shock absorber is bigger at the moment, so that the vibration and the noise of the washing machine are effectively reduced, and the performance of the shock absorber is optimized.
In a preferred technical solution of the above shock absorber, the throttle further includes a base integrally formed with or fixedly connected to the tube structure, and the base is disposed at an end of the sac away from the plunger.
Through the setting of base, make the throttling element can be reliably, stably in first cavity, and then make the relative slip between plunger and the throttling element more smoothly and stably.
In a preferred technical solution of the above shock absorber, the plurality of damping holes are uniformly or non-uniformly arranged on the outer wall of the tube structure along the axial direction of the tube structure, and the axes of the damping holes and the axis of the tube structure form an included angle.
In a preferred embodiment of the above shock absorber, an elastic member is disposed between the orifice member and the two chambers.
In a preferred embodiment of the above shock absorber, the packing member is an annular insert, and the open end of the sac is held between a radially outer side of the annular insert and an inner wall of the plunger.
In a preferred embodiment of the shock absorber described above, the radially inner side of the annular insert is arranged to allow axial sliding of the tubular structure.
In the preferable technical scheme of the shock absorber, an annular caulking groove is formed on the radial outer side of the annular insert, and a protrusion which is embedded into the annular caulking groove in a matching manner is formed on the inner wall of the plunger.
In a preferred embodiment of the above shock absorber, a sealing structure is provided between a radially inner side of the annular insert and the pipe structure.
Through the fixed connection of annular inserts and plunger, realized the reliable sealed of the open end of liquid bag to through the sealing connection between annular inserts and the throttle, guaranteed sealed can not lose efficacy owing to the slip of annular inserts in the second cavity, further guaranteed sealed validity promptly.
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 scheme.
As will be understood by those skilled in the art, in a preferred embodiment of the invention, the shock absorber comprises a sleeve having a first chamber and a plunger provided with a second chamber, in which an annular insert is provided, the plunger being inserted in the first chamber in such a way as to be slidable along the first chamber; the first cavity is internally provided with a liquid bag, the open end of the liquid bag is fixed between the inner wall of the plunger and the radial outer side of the annular insert, and the inner cavity of the liquid bag and/or the second cavity are filled with fluid. A throttle member is also disposed in the sac, the throttle member including a base plate and a tubular structure, the tubular structure being slidably insertable into the second chamber along a radially outer side of the annular insert. 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. The hydraulic control of the damping is realized through the arrangement of the liquid bag; the reliable sealing of the opening end of the liquid bag is realized through the arrangement of the annular insert; through the arrangement of the throttling element, the variable damping control of the plunger in the process of the stroke movement in the sleeve is realized. In addition, the shock absorber also has the advantages of long service life and high shock absorption reliability. When the damper is used for clothes treatment equipment (such as a washing machine), the damping force applied to the plunger can be changed at any time, and the damper can automatically adjust the damping force to the trend of optimizing the vibration reduction performance according to the vibration frequency of the washing machine, namely, the damping force more matched with the counteracting vibration is formed, so that the vibration of the washing machine is reduced, and the noise of the washing machine caused by the vibration is reduced.
Drawings
The damper and the laundry treating apparatus including the same 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 structural view of a damper for a drum washing machine according to the present invention;
FIG. 3 is a cross-sectional view of the damper for a drum washing machine according to the present invention;
FIG. 4A is an enlarged view of a portion of FIG. 3 at A showing a first embodiment of an annular insert; and
fig. 4B is a modification of fig. 4A showing a first embodiment of the annular insert.
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; 151. an annular seal groove; 152. an O-shaped sealing ring; 16. a spring; 171. clamping a hoop; 172. a claw; 173. a clamping hole; 181. an annular insert; 182. an annular caulking groove; 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 the description has been made in connection with the fluid being hydraulic oil, it will be apparent that the invention may be used with other forms of fluid 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 structural view of a damper for a drum washing machine according to the present invention; fig. 3 is a schematic sectional view of a first embodiment of a damper for a drum washing machine according to the present invention. As shown in fig. 1, the damper 1 of the present invention has one end connected to a cabinet 2 of a 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 vibration energy generated from the drum 3. Particularly, the damper of the present invention can automatically adjust the damping force according to the amplitude of the vibration generated by the washing machine, i.e., the damping force varies with the stroke variation of the plunger, so that the damper generates the damping force matched with the different vibrations of the washing machine, thereby effectively attenuating the vibration energy of the washing machine, reducing the vibration of the washing machine and reducing the noise generated with the vibration.
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 second 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, a second chamber 122 is provided in the plunger 12, and a package member is provided in the second chamber 122, and the package member is an annular insert 181 provided in the second chamber. In the assembled state, the first end of the plunger 12 (the left end of the plunger 12 shown in fig. 3) is slidably insertable into the first chamber 112 from the second end of the sleeve 11 (the right end of the sleeve 11 shown in fig. 3) along the sleeve. 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. It is understood that the connection positions of the first fixing portion 111 and the second fixing portion 121 may be reversed, that is, the first fixing portion is connected to the housing 2 of the washing machine, and the second fixing portion is connected to the drum 3 of the washing machine.
With continued reference to fig. 3, a liquid bag 14 is disposed in the first chamber 112, a throttling element 13 is disposed in the liquid bag 14, the throttling element 13 includes a base 131 and a tube structure 132 fixedly connected to or integrally formed with the base 131, and the base 131 is disposed at the closed end of the liquid bag 14. The closed end of the sac 14 (the left end of the sac 14 shown in fig. 3) abuts against the first chamber 112 of the sleeve 11, preferably fixedly connected to the sleeve 11, and the open end of the sac 14 (the right end of the sac 14 shown in fig. 3) is sealingly and tightly connected to the first end of the plunger 12, in particular, the open end of the sac 14 is fixedly connected to the first end of the plunger by the radially outer side of the annular insert 181, and the tube structure can slide radially inwardly of the annular insert 181, thereby allowing a portion of the right side of the tube structure to be inserted into the second chamber 122. The tube structure 132 is provided with a plurality of damping holes 133 (refer to fig. 4A), the inner cavity of the sac 14 and/or the second chamber 122 is filled with hydraulic oil 4 as a fluid, when the plunger 12 slides in the first chamber 112 of the sleeve 11, some of the plurality of damping holes 133 are in an open/closed state, and the hydraulic oil 4 can flow back and forth in the sac 14 and the second chamber 122 through the damping holes 133 in the open state.
Preferably, the sac 14 may be made of an elastic material such as polyurethane, silicone, rubber, etc., and preferably, the main body of the sac has a bellows structure so as to be deformed in compression/elongation during the reciprocating motion of the plunger. The plurality of damping holes 133 are disposed on the outer wall of the tube structure 132 along the axial direction of the tube structure 132, and the axes of the damping holes 133 and the axes of the tube structure 132 form an included angle, it should be noted that the distribution density of the damping holes 133 on the tube structure may be uniform or non-uniform, the apertures of the individual damping holes 133 may be the same or different, and the included angles between the axes of the damping holes 133 and the axes of the tube structure 132 may be the same or different.
Preferably, the tube structure 132 is provided with two rows of damping holes 133 with substantially the same aperture, and the angle between the axis of each damping hole 133 and the axis of the tube structure 132 is 90 °. The outer edge of the base 131 in the circumferential direction matches 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.
In order to further optimize the damping performance of the shock absorber, a spring 16 may also be arranged in the second chamber 12, the two ends of the spring abutting against the right end of the throttle and the right end of the second chamber, respectively. The action of the spring comprises: the base at the left end of the throttling element is ensured to be reset, so that the problem that the throttling element stays randomly due to throttling resistance is avoided; the stored vibration energy of the spring may be further damped to dissipate vibrations. It can be understood that the spring may be a cylindrical spring with the same diameter, or may be a special-shaped spring (the middle part has a large diameter and the two ends have a small diameter) or a special-shaped spring with a diameter gradually increasing or decreasing from one end to the other end, and further, the spring may be replaced by an elastic member such as a plate spring or an elastic block.
To further secure the positional relationship between the base 131, the closed end of the sac 14, and the first end of the sleeve, a fixing member may be provided to the shock absorber 1. Still referring to fig. 3, the fixing member includes a clamp 171 of a cylindrical structure sleeved outside the sleeve 11 and a plurality of jaws 172 disposed inside the clamp, corresponding to the jaws 172, a clamping hole 173 is disposed on the sleeve 11, and the base can be clamped between the left end of the first chamber 112 and the jaws by extending the jaws 172 into the clamping hole 173. Preferably, a certain free stroke space may be provided between the left end of the first chamber 112 and the left side of the jaw to further optimize the damping performance of the shock absorber. It will be appreciated that the clip has openings therein to ensure the assembly process is practicable.
Referring to fig. 4A and 4B, fig. 4A is an enlarged view of a portion of fig. 3 at a showing a first embodiment of an annular insert; fig. 4B is a modification of fig. 4A showing a second embodiment of the annular insert. As shown in fig. 4A and 4B, the package member is an annular insert 181, a radial outer side of the annular insert is fixed and hermetically connected with an inner side of a first end (i.e., a left end) of the plunger, and a radial inner side of the annular insert is hermetically connected with the tube structure.
In a first embodiment of the annular insert, as shown in fig. 4A, the inner wall of the plunger and the radial outer side of the annular insert are fixed and sealed by a roll forming process. Specifically, after the throttling element and the liquid sac are installed at the left end of the plunger, the plunger is subjected to thin-wall deformation through a rolling forming process, for example, an annular groove is formed in the outer wall of the plunger, an annular protrusion is further formed on the inner wall of the plunger, an annular embedding groove 182 corresponding to the annular protrusion is prefabricated on the radial outer side of the annular insert 181, the annular protrusion is pressed into the annular embedding groove 182, the fixed connection between the plunger and the annular insert is realized, and the liquid sac is extremely difficult to fall off from the space between the plunger and the annular insert. And, in the process of roll forming, the liquid sac between the plunger and the annular insert is further extruded and deformed and is partially embedded into the annular embedding groove 182, so that the sealing of the liquid sac is realized. Preferably, in order to ensure the reliability of the fixing and sealing, the annular insert is made of a material with small deformation, so that after the plunger is fixedly sealed with the annular insert through embedded riveting, the fixing and sealing failure caused by the deformation of the insert cannot occur.
As shown in fig. 4B, in order to ensure the sealing performance between the orifice 13 and the annular insert 181, a sealing structure is additionally provided between the pipe structure of the orifice 13 and the annular insert 181. For example, an annular seal groove 151 may be provided on the outer wall of the pipe structure or radially inside the annular insert 181, and an O-ring 152 may be fitted into the annular seal groove 151. Preferably, the axial length of the annular seal groove 151 may be set to be greater than the diameter of the O-ring 152 so that the O-ring can slide in the annular seal groove to further optimize the damping performance of the shock absorber.
Specifically, on the one hand, the arrangement of the O-ring seal can realize the sealing between the pipe structure and the radial inner side of the annular insert 181, and ensure that the hydraulic oil 4 does not flow through the gap between the annular insert 181 and the pipe structure, but only flows between the inner cavity of the liquid bag 14 and the second chamber 122 through the damping hole in the open state, so as to avoid the problem that the fit gap between the pipe structure 132 and the plunger 12 is too large due to the machining precision, abrasion and the like, and further the damping force of the shock absorber 1 is greatly reduced due to the flow of the hydraulic oil 4 through the gap, and improve the damping effect of the shock absorber 1. On the other hand, the arrangement of the annular seal groove 151 with a large axial length can realize that the shock absorber 1 provides different damping forces under different vibration conditions. Specifically, when the washing machine generates small vibration, the O-ring can make a small part of hydraulic oil 4 enter the annular sealing groove in a sliding manner in the annular sealing groove, so that the resistance of the hydraulic oil 4 in the liquid bag 14 and the second chamber 122 during reciprocating flow is reduced, the damping force provided by the shock absorber 1 is also reduced during small vibration, the small vibration of the drum 3 transmitted to the shell of the washing machine through the shock absorber 1 is reduced, the stable operation of the washing machine is ensured, and the noise is low. When the washing machine generates large vibration, because the vibration is large and the vibration speed is high, the O-shaped sealing ring does not move relative to the annular sealing groove basically at the moment, which is equivalent to that the O-shaped sealing ring is fixedly connected in the annular sealing groove, and the resistance of the reciprocating flow of the hydraulic oil 4 in the liquid bag 14 and the second chamber 122 is basically unchanged, so that the shock absorber 1 can provide relatively large damping force during the large vibration, and the vibration generated by the washing machine is reduced quickly.
It can be seen that in the shock absorber of the present invention, 1) since the closed end of the sac 14 is fixedly connected to the sleeve 11 through the base and the (clips, claws) and the closed end of the sac 14 is fixedly connected to the plunger 12 through the packing, the plunger 12 will stretch/compress the sac 14 and the sac 14 will provide an elastic damping force due to the stretching/compression during the reciprocating movement of the plunger 12 in the first chamber 112 of the sleeve 11. Specifically, as the stroke of the plunger 12 away from the equilibrium position in the sleeve 11 increases, the elastic damping force applied thereto also increases, thereby enhancing the vibration damping effect of the shock absorber 1; 2) since the orifice 13 is provided in the liquid bag 14 and a portion of the tube structure 132 of the orifice 13 on the right side 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 movement of the plunger 12 in the first chamber 112 of the sleeve 11, and the damping force generated through the damping holes 133 is changed accordingly, thereby further enhancing the vibration damping effect of the shock absorber 1; and 3) the pipe structure of the throttling element is relatively sealed with the annular insert 181 through (an annular sealing groove and an O-shaped sealing ring), so that in the process that the pipe structure slides relatively to the annular insert, hydraulic oil 4 only flows between the inner cavity of the liquid bag 14 and the second chamber 122 through a damping hole in the pipe structure, and the problem that the shock absorber 1 fails due to leakage of the hydraulic oil 4 is avoided. In addition, the circumferential outer edge of the base 131 is matched with the inner wall of the first chamber 112 and the arrangement of the (clamping hoop and clamping jaw) also enables the base 131 to limit the horizontal position of the pipe structure 132, even if the base can be stably positioned at the left side of the first chamber (only can move in a free stroke space), so that the relative sliding between the plunger 12 and the throttling element 13 is more smooth and stable, and the condition that the shock absorber 1 fails due to the offset of the pipe structure 132 in the working process of the throttling element 13 is avoided.
Compared with the existing damper for a drum washing machine which performs vibration damping by using friction force, the damping force generated by the damper 1 of the present invention is not a constant damping force at any time but changes with the amplitude of vibration by the arrangement of the fluid bag and the orifice, and specifically, the larger the amplitude of vibration is, the larger the damping force generated by the damper 1 against the vibration is. Moreover, the shock absorber 1 of the present invention does not have the problem that the shock absorber 1 fails after a period of operation. That is, the damper of the present invention realizes continuous variation of damping force, enhances the vibration reduction effect of the damper, increases the service life cycle of the damper, improves the reliability of the damper, and significantly improves the use experience of users when the damper is used in a drum washing machine.
Here, it should be noted 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; for a relatively large damper 1, the diameter of the valve plate may be in the range of several millimeters to ten and several millimeters.
It will 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 orifice 133 and the axis of the tube structure 132 may be any non-parallel angle, such as 45 ° or 60 ° between the axis of the damping orifice 133 and the axis of the tube structure 132.
The operation of the damper 1 of the present invention in a drum washing machine will be briefly described with reference to fig. 3 by taking the case where the washing machine generates large vibration as an example.
According to the orientation in fig. 3, when the plunger 12 is forced to slide leftward, the volume of the fluid bag 14 decreases, the damping holes 133 in the opening state on the throttling element 13 decrease, the hydraulic oil 4 is squeezed, the inner cavity of the fluid bag 14 generates positive pressure, the hydraulic oil 4 flows from the inner cavity of the fluid bag 14 to the second chamber 122 through the fewer damping holes 133 in the opening state, the hydraulic oil 4 generates a rightward damping force on the plunger 12 in the process of flowing to the second chamber 122, and the leftward movement tendency of the plunger 12 is slowed down, so that the effects of vibration reduction and noise reduction are achieved.
Similarly, when the plunger 12 is forced to slide rightwards, the volume of the liquid bag 14 is increased, the damping holes 133 in the opening state on the throttling element 13 are increased, the hydraulic oil 4 is extruded, the inner cavity of the liquid bag 14 generates negative pressure, the hydraulic oil 4 flows from the second cavity 122 to the inner cavity of the liquid bag 14 through the plurality of damping holes 133 in the opening state, the hydraulic oil 4 generates leftward damping force on the plunger 12 in the process of flowing to the inner cavity of the liquid bag 14, the rightward movement trend of the plunger 12 is slowed down, and therefore vibration reduction and noise reduction effects are achieved.
And, the roll forming between the radial outside of annular inserts and the plunger and the seal structure between the radial inboard of annular inserts and the tubular construction have avoided appearing following problem effectively: due to the fact that the fit clearance between the plunger and the annular insert and between the annular insert and the pipe structure is too large due to the machining precision of the shock absorber, abrasion and the like, hydraulic oil easily flows in the too large clearance, and therefore the throttling resistance of the shock absorber is greatly reduced. That is, due to the roll forming and the arrangement of the (annular sealing groove and the O-ring), the hydraulic oil 4 in the second chamber flows into the inner cavity of the liquid bag 14 only through the plurality of damping holes 133 in the open state, so that the precision of the damping force generated by the shock absorber is ensured.
Referring again to fig. 1, the present invention also provides, in another aspect, a washing machine including a casing 2 and a drum 3 disposed in the casing 2, the drum 3 being supported on the casing 2 by two dampers 1 of the present invention. Of course, the number of the dampers 1 in the drum washing machine is not constant, and three, four or more dampers may be provided in the drum washing machine, and at least one of the dampers is the damper 1 of the present invention.
Furthermore, 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 vibration 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 (10)
1. A shock absorber, comprising:
a sleeve having a first chamber;
a plunger having a second chamber, the plunger slidably inserted into the first chamber;
characterized in that the shock absorber further comprises a liquid bag and a packaging member arranged in the second chamber,
the sac is arranged in the first chamber, the opening end of the sac is fixedly connected with the first end of the plunger through the packaging piece,
wherein a throttle member is provided in the sac, the throttle member being partially inserted into the second chamber, the throttle member being provided with a plurality of orifice holes, a part of which are in an open/closed state with sliding of the plunger, the first chamber and the second chamber being communicated with each other via the orifice holes in the open state;
wherein the inner cavity of the sac and/or the second chamber is filled with a fluid.
2. The shock absorber according to claim 1, wherein said orifice member comprises a tube structure, a portion of said tube structure being inserted into said second chamber, said packing member being disposed between said tube structure and said plunger.
3. The shock absorber according to claim 2, wherein the throttle member further comprises a base integrally formed with or fixedly attached to the tube structure, the base being disposed at an end of the sac remote from the plunger.
4. The shock absorber according to claim 3, wherein the plurality of damping holes are uniformly or non-uniformly arranged on the outer wall of the tube structure along the axial direction of the tube structure, and the axes of the damping holes form an included angle with the axis of the tube structure.
5. The shock absorber according to claim 2, wherein an elastic member is provided between the orifice member and the second chamber.
6. The shock absorber according to any one of claims 2 to 5 wherein the encapsulation is an annular insert, the open end of the sac being clamped between a radially outer side of the annular insert and an inner wall of the plunger.
7. The shock absorber according to claim 6, wherein a radially inner side of said annular insert is arranged to allow axial sliding of said tube structure.
8. The shock absorber according to claim 7, wherein a radially outer side of the annular insert is provided with an annular caulking groove, and a protrusion that fits into the annular caulking groove is formed on an inner wall of the plunger.
9. The shock absorber according to claim 7, wherein a sealing structure is provided between a radially inner side of said annular insert and said tube structure.
10. 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 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710693933.7A CN109385830B (en) | 2017-08-14 | 2017-08-14 | Damper and laundry treating apparatus including the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710693933.7A CN109385830B (en) | 2017-08-14 | 2017-08-14 | Damper and laundry treating apparatus including the same |
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| Publication Number | Publication Date |
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| CN109385830A CN109385830A (en) | 2019-02-26 |
| CN109385830B true CN109385830B (en) | 2021-12-03 |
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| CN201710693933.7A Active CN109385830B (en) | 2017-08-14 | 2017-08-14 | Damper and laundry treating apparatus including the same |
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| CN202132441U (en) * | 2011-06-24 | 2012-02-01 | 浙江强广剑工贸有限公司 | Damping shock absorber |
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| CN203189596U (en) * | 2013-04-02 | 2013-09-11 | 江苏昌力油缸有限公司 | Controllable reset damping oil cylinder |
| CN105755757A (en) * | 2016-04-13 | 2016-07-13 | 青岛海尔洗衣机有限公司 | Washing machine feet with automatic levelling function and washing machine |
| CN105889389A (en) * | 2016-02-20 | 2016-08-24 | 宋万杰 | Air bag shock-absorbing device remarkably improving shock-absorbing performance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0478273A2 (en) * | 1990-09-25 | 1992-04-01 | Bridgestone Corporation | Vibration damping device |
| CN201843931U (en) * | 2010-10-25 | 2011-05-25 | 重庆瑞翱机电设备有限公司 | Motorcycle front shock absorber with automatically changing damping resistance |
| CN202132441U (en) * | 2011-06-24 | 2012-02-01 | 浙江强广剑工贸有限公司 | Damping shock absorber |
| CN102359529A (en) * | 2011-09-12 | 2012-02-22 | 吕再昌 | Piston type hydropneumatic buffer |
| CN203189596U (en) * | 2013-04-02 | 2013-09-11 | 江苏昌力油缸有限公司 | Controllable reset damping oil cylinder |
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| Publication number | Publication date |
|---|---|
| CN109385830A (en) | 2019-02-26 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20211105 Address after: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant after: QINGDAO HAIER WASHING MACHINE Co.,Ltd. Applicant after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER WASHING MACHINE Co.,Ltd. |
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