CN109385829B - Damper and laundry treating apparatus including the same - Google Patents

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, the liquid bag is arranged in the first cavity, 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 cavity. 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

Damper and laundry treating apparatus including the same

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, the liquid bag is arranged in the first cavity, 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 cavity.

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 above shock absorber, a throttle member is provided in the liquid bag, a part of the throttle member is inserted into the second chamber, the throttle member is provided with a plurality of damping holes, a part 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 embodiment of the shock absorber, the throttle member 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 a portion of the tube structure is inserted into the second chamber.

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.

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 embodiment of the above shock absorber, an elastic member is disposed between the orifice member and the two chambers.

In the preferable technical scheme of the shock absorber, the packaging part is a pressing ring, the pressing ring is fixedly connected with the first end of the plunger, and the opening end of the sac is clamped between the pressing ring and the first end of the plunger.

In the preferable technical scheme of the shock absorber, the first end of the plunger is provided with an annular frustum, and the open end of the sac is clamped in an annular taper gap between the pressing ring and the annular frustum.

In the preferred technical scheme of above-mentioned bumper shock absorber, the first end of plunger is provided with first annular boss, the open end of sac includes axial centre gripping district section and radial centre gripping district section, axial centre gripping district section centre gripping is in the clamping ring with in the axial annular space between the first annular boss, radial centre gripping district section centre gripping is in the clamping ring with in the radial annular space between the terminal surface of the first end of plunger.

In the preferable technical scheme of the shock absorber, a second annular boss extends out of the end face of the first end of the plunger, and the radial annular gap is formed among the second annular boss, the pressing ring and the end face of the first end of the plunger.

Through the cooperation of clamping ring and plunger, realized the reliable sealing of the open end of sac to through the fixed connection between clamping ring and the plunger, guaranteed sealed can not lose efficacy owing to the dislocation of clamping ring or throw off, 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 one of the previous aspects.

As will be appreciated 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, the plunger being slidably inserted in the first chamber; be provided with the sac in the first cavity, the open end of sac passes through clamping ring and plunger fixed connection, and the inner chamber of sac and/or second cavity are filled with fluid. 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. 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 pressure ring; 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;

figure 4A is an enlarged view of a portion of figure 3 at a showing a first embodiment of the pressure ring seal;

figure 4B is a modification of figure 4A showing a second embodiment of the pressure ring seal; and

figure 4C is a modification of figure 4B showing a third embodiment of the pressure ring seal.

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. pressing a ring; 182. a screw; 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. 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 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 and the plunger 12 has a second chamber 122 disposed therein. In the assembled state, a 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 a 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. 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 sac 14 is disposed in the first chamber 112, and a restriction 13 is disposed in the sac 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 means of a packing member. The throttling element 13 includes a base 131 and a tube structure 132 fixedly connected to or integrally formed with the base 131, the base 131 is disposed at the closed end of the sac 14, and a portion of the tube structure 132 is 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 compressed/elongated and deformed 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.

Further, in order to ensure the sealing performance between the orifice 13 and the plunger 12, an annular sealing groove 151 may be provided on an outer wall of the orifice 13 or an inner wall of the plunger 12, and an O-ring 152 may be embedded in the annular sealing groove 151. Further 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 can realize the sealing between the tube structure 132 and the inner wall of the plunger 12, and ensure that the hydraulic oil 4 does not flow through the gap between the plunger 12 and the tube structure 132, but only flows between the sac 14 and the second chamber 122 through the damping hole 133, thereby avoiding the problem that the fit gap between the tube 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 flowing of the hydraulic oil 4 through the gap, and improving 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.

On this basis, in order to further optimize the damping performance of the shock absorber, a spring 16 may be disposed in the second chamber 12, with both ends of the spring abutting against the right end of the orifice 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 shaped spring (the middle portion has a large diameter and the two ends have a small diameter) or the diameter of the shaped spring gradually increases or decreases from one end to the other end, and further, the spring may be replaced by other elastic members such as a plate spring or an elastic block.

To further secure the positional relationship between the base 131, the closed end of the liquid bladder 14, and the first end of the sleeve 11, a fixing member may be provided to the shock absorber 1. Still referring to fig. 3, the fixing member may include a clamp 171 of a cylindrical structure disposed outside the sleeve 11 and a plurality of claws 172 disposed inside the clamp. Corresponding to the latch 172, a latch hole 173 is formed in the sleeve 11, and the latch 172 is inserted into the latch hole 173, so that the base of the throttle member is latched between the left end of the first chamber 112 and the latch. Preferably, a certain free stroke space may be provided between the left end of the first chamber 112 and the left side of the pawl 172 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 figures 4A, 4B and 4C, figure 4A is an enlarged view of a portion of figure 3 at a showing a first embodiment of a pressure ring seal; figure 4B is a modification of figure 4A showing a second embodiment of the pressure ring seal; figure 4C is a modification of figure 4B showing a third embodiment of the pressure ring seal. As shown in fig. 4A, 4B and 4C, the package is a press ring 181, the press ring 181 is fixed to a first end (i.e., left end) of the plunger by a screw 12, and the open end of the sac is sandwiched between the press ring and the first end of the plunger. Obviously, the pressing ring 181 and the plunger 12 can be fastened by bolts, ultrasonic welding, adhesion, and snapping.

In a first embodiment of the compression ring seal, as shown in figure 4A, the left end of the plunger extends out of a hollow annular frustum and the opening of the sac is fixed between the compression ring 181 and the annular frustum. Preferably, the outer wall of the frustum is a conical surface with the sectional area gradually reduced from right to left, and the opening end of the liquid bag is axially clamped in an annular conical gap between the pressure ring and the annular frustum. Specifically, after the orifice and the sac are mounted on the left end of the plunger, the pressing ring is pushed rightward, and the open end of the sac having a cylindrical structure (the same thickness) is pressed more to the right side, that is, more tightly to the end by the variable cross-section arrangement, whereby the open end of the sac and the plunger can be fastened and sealed more effectively and reliably.

In a second embodiment of the pressing ring seal, as shown in fig. 4B, a hollow first annular boss extends from the left end of the plunger, the open end of the cylindrical sac includes an axial clamping section and a radial clamping section, and the axial clamping section and the radial clamping section are respectively fixed between the pressing ring 181 and the first annular boss. Specifically, an annular groove is additionally arranged at the right end of the pressing ring 181, an axial clamping section of the opening end of the sac is clamped in an axial annular gap between the pressing ring and the first annular boss, and a radial clamping section of the opening end of the sac is clamped in a radial annular gap between the annular groove of the pressing ring and the end face of the first end of the plunger. Through the setting of annular, make the open end of liquid bag obtain axial and radial double extrusion, after throttle spare and liquid bag have been installed to the left end of plunger promptly, impel right through the clamping ring, at tubular structure's terminal annular flaring edge to can realize the fastening between the open end of liquid bag and the plunger more effectively, reliably and seal.

As shown in fig. 4C, in the third embodiment of the pressure ring seal, the radial annular gap is formed in a manner that: the end face of the left end of the plunger is provided with a hollow second annular boss extending out, and the second annular boss divides the part outside the first annular boss in the radial direction into a first part close to the inner side and a second part close to the outer side. Correspondingly, the right end of the pressing ring 181 is a stepped surface, and the axial clamping section of the open end of the sac is clamped in the axial annular gap between the pressing ring and the first annular boss by the matching of the stepped surface and the first portion, while the radial clamping section of the open end of the sac is clamped in the radial annular gap formed by the stepped surface, the end surface of the plunger and the second annular boss. Meanwhile, the pressing ring is convenient to mount and position through the matching of the step surface and the second part, namely the alignment of the threaded hole in the pressing ring is convenient through the matching of the step surface and the second part. Through the combination setting of first annular boss and second annular boss, make the open end of barrel-shaped structure's sac form annular thickening portion at the end to can realize the fastening seal between the open end of sac and the plunger more effectively, reliably.

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 bladder 14 and a portion of the tube structure 132 of the orifice 13 is inserted into the second chamber 122, the number of the damping holes 133 in the opened 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 throttling element is in sealing connection with the plunger 12 through (an annular sealing groove and an O-shaped sealing ring), so that in the process that the plunger 12 slides relative to the sleeve 11, hydraulic oil 4 only flows among the liquid bag 14, the pipe structure and the second chamber 122 through damping holes in the throttling element, and the problem that the shock absorber 1 fails due to leakage of the hydraulic oil 4 is solved.

In addition, the circumferential outer edge of the base 131 is matched with the inner wall of the first chamber 112 and is used as a fixing part (a clamp and a claw), so that the base 131 can limit the horizontal position of the pipe structure 132, even if the base can be stably positioned on the left side of the first chamber (only can move in a free stroke space), relative sliding between the plunger 12 and the throttling piece 13 is 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 piece 13 is avoided.

Compared with the existing shock absorber of the drum washing machine which performs shock absorption by using friction force, the damping force generated by the shock absorber 1 of the invention is not constant damping force at any moment but changes along with the amplitude of vibration by arranging the liquid bag and the throttling element, and the larger the amplitude of vibration is, the larger the damping force generated by the shock absorber 1 for resisting the vibration is. Moreover, 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, thereby solving the problem that the damping force can not be continuously changed in the prior art, greatly enhancing the damping effect of the shock absorber 1, and obviously improving the use experience of users when the shock absorber is used for 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 in the horizontal leftward direction.

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 becomes smaller, the damping holes 133 in the opening state on the throttling element 13 are reduced, 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 rightward damping force on the plunger 12 in the process of flowing to the second chamber 122, the leftward movement trend of the plunger 12 is slowed down, and therefore vibration reduction and noise reduction effects 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 setting of clamping ring and (annular seal groove, O type sealing washer) has avoided appearing following problem effectively: due to the fact that the fit clearance between the plunger and the throttling piece 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 arrangement of the pressing ring and the (annular sealing groove, 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, and the precision of the damping force provided 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, three, four or more dampers may be provided in the drum washing machine, and at least one of the dampers may be 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 is conceivable for those skilled in the art that the present invention can be applied to other clothes treatment apparatuses besides the drum washing machine, such as a pulsator washing machine, a clothes dryer, a shoe washing machine, and the like.

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 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 also comprises a liquid bag and a packaging piece,

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 the inner cavity of the sac and/or the second chamber is filled with a fluid;

wherein a throttle member is provided in the liquid bladder, 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.

2. The shock absorber according to claim 1, wherein the orifice member comprises a base and a tube structure integrally formed or fixedly connected to the base, the base being disposed at an end of the sac remote from the plunger, a portion of the tube structure being inserted into the second chamber.

3. The shock absorber according to claim 2, 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.

4. The shock absorber according to claim 1, wherein an elastic member is provided between the orifice member and the second chamber.

5. The damper according to any one of claims 1 to 4, wherein the encapsulation is a compression ring, the compression ring is fixedly connected to the first end of the plunger, and the open end of the sac is clamped between the compression ring and the first end of the plunger.

6. The shock absorber according to claim 5, wherein the first end of the plunger is provided with an annular frustum and the open end of the sac is clamped in an annular tapered void between the press ring and the annular frustum.

7. The shock absorber according to claim 5, wherein the first end of the plunger is provided with a first annular boss, the open end of the sac comprises an axial clamping section and a radial clamping section, the axial clamping section being clamped in an axial annular space between the press ring and the first annular boss, the radial clamping section being clamped in a radial annular space between the press ring and the end face of the first end of the plunger.

8. The damper according to claim 7, wherein a second annular boss extends from the end face of the first end of the plunger, the second annular boss, the compression ring and the end face of the first end of the plunger forming the radial annular space therebetween.

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 to 8.

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