CN111088659B

CN111088659B - Variable damping shock absorber and clothes treatment equipment

Info

Publication number: CN111088659B
Application number: CN201811238122.9A
Authority: CN
Inventors: 赵志强; 许升; 尹俊明; 舒海
Original assignee: Hefei Haier Drum Washing Machine Co ltd; Haier Smart Home Co Ltd
Current assignee: Hefei Haier Drum Washing Machine Co ltd; Haier Smart Home Co Ltd
Priority date: 2018-10-23
Filing date: 2018-10-23
Publication date: 2022-06-17
Anticipated expiration: 2038-10-23
Also published as: JP7141527B2; CN111088659A; JP2022505651A; WO2020082981A1

Abstract

The invention belongs to the field of damping shock absorbers, and particularly provides a variable damping shock absorber and clothes treatment equipment. The invention aims to solve the problem that a damping part of the existing variable damping shock absorber is easy to deform and lose efficacy. To this end, the variable damping shock absorber of the present invention includes a sleeve, a plunger, and a damping ring. The plunger is provided with an annular reducing groove, and the plunger is inserted into the sleeve in an axially slidable manner, so that the reducing groove is always positioned in the sleeve. The damping ring is sleeved in the reducing groove, and the outer side end of the damping ring is abutted to the inner wall of the sleeve. The damping ring is provided with an opening, and the size of the opening can be changed to change the radial size of the damping ring, so that the diameter of the reducing groove can be matched. Therefore, compared with the damping ring in the prior art, the damping ring effectively avoids the irreversible deformation on the thickness when the damping ring is extruded for a long time along the radial direction, and ensures the reliability of the shock absorber.

Description

Variable damping shock absorber and clothes treatment equipment

Technical Field

The invention belongs to the field of damping shock absorbers, and particularly provides a variable damping shock absorber and clothes treatment equipment.

Background

The existing drum washing machine mainly comprises a box body, an outer drum and an inner drum. Wherein, the outer cylinder is fixedly connected with the box body through a hanging spring and a shock absorber. Specifically, the top of the outer cylinder is fixedly connected with the top of the box body through a hanging spring, and the bottom of the outer cylinder is fixedly connected with the bottom of the box body through a shock absorber. The inner cylinder is rotatably disposed in the outer cylinder.

In the working process of the washing machine, because the clothes are unevenly distributed in the inner barrel, the inner barrel can drive the outer barrel to shake up and down, left and right when rotating. The shaking strength and amplitude of the outer cylinder can be reduced by arranging the hanging spring and the shock absorber. Especially, the vibration absorber can absorb and eliminate the vibration of the washing machine, prevent the washing machine from crawling, reduce the noise of the washing machine, further ensure the performance of the washing machine and prolong the service life of the washing machine.

However, the damping force generated by the prior art shock absorbers is generally a constant value and cannot be adapted to all operating conditions of the washing machine. When the washing machine carries out high-speed dehydration, the amplitude generated by the outer cylinder is small, and the required damping force is small; when the washing machine is used for washing, rinsing and low-speed dewatering, the amplitude generated by the outer cylinder is large, and the required damping force is also large.

To this end, patent publication No. CN1519418A discloses a shock absorber including a cylinder, a piston rod inserted into the cylinder, and a movable damping member fitted over the piston rod. Wherein, the piston rod is provided with an annular groove for installing the movable damping piece, and the diameter of the annular groove is gradually increased from the middle to two sides. When the movable damping piece is positioned in the middle of the annular groove, the damping force between the movable damping piece and the cylinder is small, and the damping force is used for eliminating vibration generated during high-speed dehydration of the washing machine; when the movable damping parts are positioned at the two sides of the annular groove, the damping force between the movable damping parts and the cylinder is larger, and the damping device is used for eliminating the vibration generated during washing, rinsing and low-speed dewatering of the washing machine.

However, in the damper disclosed in the patent publication No. CN1519418A, the movable damping members are easily deformed by the two ends of the annular groove during a long time use, and thus cannot be matched with the middle position of the annular groove, so that the damper loses the damping effect when the washing machine is dehydrated at a high speed, and the noise of the washing machine is increased.

Accordingly, there is a need in the art for a new variable damping shock absorber and a laundry treating apparatus to solve the above problems.

Disclosure of Invention

In order to solve the above problems in the prior art, that is, to solve the problem that the damping member of the existing variable damping shock absorber is easy to deform and fail, the invention provides a variable damping shock absorber, which comprises a sleeve, a plunger and a damping ring; an annular reducing groove is formed in the plunger, and the plunger is inserted into the sleeve in a sliding mode along the axial direction, so that the reducing groove is located in the sleeve all the time; the damping ring is sleeved in the reducing groove, and the outer side end of the damping ring is abutted to the inner wall of the sleeve; the damping ring is radially deformable to match a diameter of an inboard end of the damping ring to a diameter of the reducing groove.

In a preferred embodiment of the variable damping shock absorber, the damping ring is provided with an opening, and the damping ring can be radially enlarged as the opening is enlarged and radially reduced as the opening is reduced.

In the above preferred technical solution of the variable damping shock absorber, the damping ring comprises an inner friction ring slidably connected with the plunger and an outer friction ring slidably connected with the sleeve, and the opening comprises a first opening formed on the inner friction ring, and the first opening makes the inner friction ring form an open ring; the outer friction ring is sleeved outside the inner friction ring.

In a preferred embodiment of the variable damping shock absorber, the outer friction ring is an integrally formed ring structure.

In a preferred embodiment of the variable damping shock absorber, the opening includes a second opening formed in the outer friction ring, and the second opening makes the outer friction ring form an open ring.

In a preferred embodiment of the variable damping shock absorber, the outer friction ring includes a plurality of friction plates arranged at equal intervals along a circumferential direction of the inner friction ring.

In a preferred technical solution of the above variable damping shock absorber, a plurality of protruding structures are respectively provided at two side ends of the outer friction ring in the axial direction.

In the preferable technical scheme of the variable damping shock absorber, the damping ring is made of an elastic material; and/or the reducing groove is a stepped annular groove; and/or the diameter of the reducing groove is gradually increased from the middle to two sides; and/or the reducing grooves are symmetrically arranged along the radial direction.

In addition, the present invention also provides a laundry treating apparatus including the variable damping bumper of any one of the above preferred embodiments.

In a preferred embodiment of the above laundry treating apparatus, the laundry treating apparatus includes at least one of a washing machine, a dryer, and a washing and drying machine.

It can be understood by those skilled in the art that in the preferred embodiment of the present invention, the diameter of the inner end of the damping ring can be changed according to the diameter change of the reducing groove by providing the plunger with the annular reducing groove and arranging the damping ring to be deformable in the radial direction. Therefore, the damping ring which can deform along the radial direction can adapt to the diameter change of the radial groove, and compared with the traditional damping ring which cannot deform along the radial direction, the damping ring effectively improves the reliability of the shock absorber and prolongs the service life.

As can be understood by those skilled in the art, when the damping ring is located at a position where the inner diameter of the reducing groove is smaller, the pressure of the damping ring on the sleeve is smaller, and the damping force generated between the damping ring and the sleeve is also smaller; when the damping ring is located at the position with the larger inner diameter of the reducing groove, the pressure of the damping ring on the sleeve is larger, and the damping force generated between the damping ring and the sleeve is also larger.

Further, the damping ring is provided with an opening, and when the damping ring is enlarged along the radial direction, the opening is enlarged; the openings become smaller as the damping ring becomes smaller in the radial direction. In other words, the damping ring of the present invention can achieve deformation in the radial direction by changing the size of the opening therein. Therefore, compared with the damping ring in the prior art, the damping ring effectively avoids the irreversible deformation on the thickness when the damping ring is extruded for a long time along the radial direction, and ensures the reliability of the shock absorber.

Drawings

Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

FIG. 1 is a side view of the variable damping shock absorber of the present invention;

FIG. 2 is an exploded view of the structure of the variable damping shock absorber of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a front view of the variable damping shock absorber of FIG. 1;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is an enlarged view of portion C of FIG. 5;

FIG. 7 is a cross-sectional view taken along the line E-E in FIG. 6;

FIG. 8 is a cross-sectional view taken along the direction F-F in FIG. 6;

FIG. 9 is a sectional view taken along the direction G-G in FIG. 6;

FIG. 10 is a sectional view taken along the direction H-H in FIG. 6;

fig. 11 is a sectional view taken along the direction J-J in fig. 6.

List of reference numerals:

1. a sleeve; 2. a plunger; 21. a reducing groove; 3. a damping ring; 31. an inner friction ring; 311. a first opening; 32. an outer friction ring; 321. a second opening; 322. and (4) convex teeth.

Detailed Description

It should be understood by those skilled in the art that the embodiments of the present invention 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 embodiment of the present invention describes the variable damping shock absorber of the present invention by taking a drum washing machine as an example, the variable damping shock absorber of the present invention can be applied to any other feasible devices, such as automobiles, motorcycles, electric vehicles, bicycles, etc. Those skilled in the art can make modifications as needed to suit a particular application, and such modified embodiments will still fall within the scope of the present invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only 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; 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.

As shown in fig. 1 to 5, the variable damping shock absorber of the present invention mainly includes a sleeve 1, a plunger 2, and a damping ring 3. The plunger 2 is inserted into the sleeve 1 in an axial sliding manner, the damping ring 3 is arranged between the sleeve 1 and the plunger 2 in a radial direction, the outer side end (outer circumferential surface) of the damping ring 3 abuts against the inner wall of the sleeve 1, and the inner side end (inner circumferential surface) of the damping ring 3 abuts against the outer wall (outer side wall) of the plunger 2. When the plunger 2 slides relative to the sleeve 1 in the axial direction, the damping ring 3 can generate a damping force to resist the sliding of the plunger 2. Further, in order to avoid the damping ring 3 from being worn during sliding, the inner end and/or the outer end of the damping ring 3 is/are further provided with damping grease. In particular, the damping grease may be applied to the inboard and/or outboard ends of the damping ring 3.

As shown in fig. 1 and 2, the ends of the sleeve 1 and the plunger 2 which are far away from each other are respectively provided with a hinge ring (not marked in the figures) so that the sleeve 1 can be pivotally connected with other structures, devices or equipment through the hinge ring thereon, and the plunger 2 can be pivotally connected with other structures, devices or equipment through the hinge ring thereon.

As shown in fig. 2, 3, 5, and 6, the plunger 2 is provided with an annular diameter-variable groove 21, and the diameter of the diameter-variable groove 21 is gradually increased from the center to both sides. Further, the reducing groove 21 is a stepped annular groove. Further, the reducing grooves 21 are symmetrically arranged in the radial direction. Specifically, as shown in fig. 3, the reducing groove 21 is left-right symmetrical in the up-down direction in fig. 3, and left and right portions of the reducing groove 21 are stepped annular grooves, respectively, and the diameters of the plurality of steps increase in order from the middle outward.

For convenience of explanation, the right end of the diameter-changing groove 21 in fig. 6 will be referred to as a first side end, and the left end of the diameter-changing groove 21 in fig. 6 will be referred to as a second side end.

As shown in fig. 6, a portion between the middle position and the first side end of the reducing groove 21 includes five annular grooves from left to right: d1, D2, D3, D4 and D5. The diameters of the five annular grooves have numerical size relations as follows: d1 < D2 < D3 < D4 < D5. Likewise, the portion between the middle position and the second side end of the reducing groove 21 includes five annular grooves from right to left: d1, D2, D3, D4 and D5. Preferably, the two adjacent annular grooves are smoothly transited by arc-shaped chamfers, so that the damping ring 3 can smoothly move between the annular grooves.

It will be understood by those skilled in the art that the number of the stepped annular grooves in the reducing groove 21 is not limited to the five (D1, D2, D3, D4 and D5) but may be any number. E.g., two, three, four, six, seven, eight, etc.

In addition, in another possible embodiment of the present invention, the skilled person can also set the reducing groove 21 as an annular groove with smooth transition along the axial direction, and preferably the edge of the tangential surface of the reducing groove 21 along the axial direction is arc-shaped. Alternatively, the reducing grooves 21 are provided as annular grooves of equal diameter.

As shown in fig. 3 and 6, the damping ring 3 of the present invention mainly includes an inner friction ring 31 and an outer friction ring 32. In an assembled state of the variable damping shock absorber of the present invention, the inner friction ring 31 is sleeved on the outer side of the plunger 2, the outer friction ring 32 is sleeved on the outer side of the inner friction ring 31, and the outer end of the outer friction ring 32 abuts against the inner wall of the sleeve 1.

As shown in fig. 3, the inner friction ring 31 is formed with a first opening 311, and the presence of the first opening 311 causes the inner friction ring 31 to form an open ring. When the inner friction ring 31 is deformed in the radial direction and becomes large in diameter, the first opening 311 becomes large; when the inner friction ring 31 is deformed in the radial direction and becomes smaller in diameter, the first opening 311 becomes smaller.

With continued reference to FIG. 3, the outer friction ring 32 defines a second opening 321, and the second opening 321 is present such that the outer friction ring 32 defines an open ring. When the outer friction ring 32 is deformed in the radial direction and becomes large in diameter, the second opening 321 becomes large; when the outer friction ring 32 is deformed in the radial direction and becomes smaller in diameter, the second opening 321 becomes smaller.

With reference to fig. 3, the outer friction ring 32 is provided with a plurality of teeth 322 at two axial ends. The plurality of teeth 322 are arranged at equal intervals in the circumferential direction of the outer friction ring 32. As can be seen from fig. 3, in the preferred embodiment of the present invention, the teeth 322 are bar-shaped convex structures, and the extension line of each tooth 322 intersects with the axis of the outer friction ring 32.

As shown in fig. 3 and 6, the outer friction ring 32 can clamp the inner friction ring 31 in the middle by the convex teeth 322 on both sides thereof, so as to prevent the inner friction ring 31 from shaking in the axial direction relative to the outer friction ring 32. Specifically, the length of each of the convex teeth 322 is normally equal to or close to equal to the sum of the widths of the inner friction ring 31 and the outer friction ring 32 in the radial direction. Alternatively, one skilled in the art may make the inner diameter of the ring structure formed by the plurality of teeth 322 slightly smaller than the inner diameter of the inner friction ring 31, if necessary. That is, the inner end of each tooth 322 is closer to the axis of inner friction ring 31 than the inner end of inner friction ring 31.

Further, in the preferred embodiment of the present invention, both the inner friction ring 31 and the outer friction ring 32 are made of a material having elasticity. Illustratively, the material is a cellular polyurethane or an elastomeric rubber. Further, the inner friction ring 31 may be made of metal, for example, the inner friction ring 31 may be formed of a C-shaped metal spring plate, as required by those skilled in the art. Further, it is also possible for those skilled in the art to make the outer friction ring 32 of metal, for example, to configure the outer friction ring 32 as a C-shaped metal spring plate.

It should be noted that, in the preferred embodiment of the present invention, the convex teeth 322 can play a role of noise reduction and noise reduction. Specifically, during the movement of the damping ring 3 in the diameter-varying groove 21, the convex teeth 322 contact and collide with the side wall of the diameter-varying groove 21 before the inner friction ring 31 and the outer friction ring 32 contact. The side walls include side walls at both ends of the diameter-variable groove 21 and side walls of each of the annular grooves (D1, D2, D3, D4 and D5) in the diameter-variable groove 21. Since the teeth 322 are more easily deformed than the inner friction ring 31 and the outer friction ring 32, energy generated by collision can be rapidly absorbed when the teeth 322 collide with the side wall, so that noise can be reduced and noise can be prevented.

The operation of the variable damping shock absorber of the present invention will be described in detail with reference to fig. 6 to 11 in conjunction with a drum washing machine.

It should be noted that the drum washing machine of the present invention includes a box, an outer cylinder, an inner cylinder, a tension spring and a variable damping shock absorber. The top of the outer cylinder is connected with the top of the box body through a tension spring, and the bottom of the outer cylinder is connected with the bottom of the box body through a variable damping shock absorber. The inner cylinder is rotatably disposed in the outer cylinder. Since other structural features of the drum type washing machine are well known to those skilled in the art, they will not be described herein in detail.

As shown in fig. 6, in a normal state and when the frequency of the outer cylinder sloshing is high, the amplitude of the outer cylinder sloshing is small, and the damping ring 3 reciprocates between D1-D1. As the frequency of the shaking of the outer cylinder is reduced, the amplitude of the shaking of the outer cylinder is gradually increased, the damping ring 3 is gradually transited from the reciprocating movement between D1-D1 to the reciprocating movement between D2-D2, from the reciprocating movement between D2-D2 to the reciprocating movement between D3-D3, from the reciprocating movement between D3-D3 to the reciprocating movement between D4-D4, and from the reciprocating movement between D4-D4 to the reciprocating movement between D5-D5.

As shown in fig. 6 and 7, when moving in the annular groove D1, the outer friction ring 32 of the damping ring 3 abuts against the inner wall of the sleeve 1, and the inner friction ring 31 of the damping ring 3 is separated from the outer wall of D1. The sleeve 1 and the plunger 2 do not generate a damping force when sliding relative to each other. The sleeve 1 and plunger 2 are free to slide relative to each other. The damping force between the sleeve 1 and the plunger 2 is close to zero and is denoted F1.

As shown in fig. 6 and 8, when moving in the annular groove D2, the outer friction ring 32 of the damping ring 3 abuts against the inner wall of the sleeve 1, and the inner friction ring 31 of the damping ring 3 contacts the inner wall of D2, but no pressure is generated. The damping force generated when the sleeve 1 and the plunger 2 slide relative to each other is denoted as F2.

As shown in fig. 6 and 9, when moving in the annular groove D3, the outer friction ring 32 of the damping ring 3 abuts against the inner wall of the sleeve 1, and the inner friction ring 31 of the damping ring 3 contacts the inner wall of the D3. The plunger 2 starts to press the inner friction ring 31 radially outward, deforming the inner friction ring 31 in the radial direction, and the first opening 311 starts to become larger. The inner friction ring 31, which has become larger in diameter, starts to press the outer friction ring 32 radially outward, so that the outer friction ring 32 is pressed against the inner wall of the sleeve 1. At this time, the damping force generated when the sleeve 1 and the plunger 2 slide relative to each other is denoted by F3.

As shown in fig. 6 and 10, when moving in the annular groove D4, the outer friction ring 32 of the damping ring 3 abuts against the inner wall of the sleeve 1, and the inner friction ring 31 of the damping ring 3 contacts the inner wall of D4. The plunger 2 further presses the inner friction ring 31 radially outward, increasing the amount of deformation of the inner friction ring 31, and further increasing the degree of opening of the first opening 311. Thereby causing the inner friction ring 31 to further press the outer friction ring 32, increasing the pressure of the outer friction ring 32 against the sleeve 1. At this time, the damping force generated when the sleeve 1 and the plunger 2 slide relative to each other is denoted by F4.

As shown in fig. 6 and 11, when moving in the annular groove D5, the outer friction ring 32 of the damping ring 3 abuts against the inner wall of the sleeve 1, and the inner friction ring 31 of the damping ring 3 contacts the inner wall of the D5. The plunger 2 presses the inner friction ring 31 further radially outward again, so that the amount of deformation of the inner friction ring 31 increases again, and the degree of opening of the first opening 311 becomes larger again. The inner friction ring 31 is further pressed against the outer friction ring 32, and the pressure of the outer friction ring 32 on the sleeve 1 is increased again. At this time, the damping force generated when the sleeve 1 and the plunger 2 slide relative to each other is denoted by F5.

It can be understood by those skilled in the art that the process of sliding the damping ring 3 from the annular groove D5 to the annular groove D1 is the reverse of the above process, and thus will not be described herein too much.

Those skilled in the art will appreciate that since the diameters of D1, D2, D3, D4 and D5 become larger in order, the pressure applied to the sleeve 1 by the damping ring 3 at D1, D2, D3, D4 and D5 becomes larger in order, so that F1 < F2 < F3 < F4 < F5.

It will be appreciated by those skilled in the art that since D1, D2, D3, D4 and D5 all have a certain length, the damping force generated by damping ring 3 at D1, D2, D3, D4 and D5 is constant. This structure facilitates the designer to calculate the sizes of F1, F2, F3, F4 and F5, and enables the designer to determine D1, D2, D3, D4 and D5 as required, so that the variable damping damper can be adapted to various shaking frequencies and amplitudes of the outer tub of the drum washing machine.

Based on the above description, it can be understood by those skilled in the art that the present invention can change the pressure of the outer friction ring 32 on the sleeve 1 by providing the first opening 311 on the inner friction ring 31 and the second opening 321 on the outer friction ring 32, so that the inner friction ring 31 can press or pull the outer friction ring 32 outwards along with the diameter change of the reducing groove 21, and thus the function of damping the stroke of the shock absorber is achieved. Meanwhile, compared with the traditional friction piece without an opening, the damping ring 3 can avoid the irreversible deformation on the thickness of the damping ring 3 in the long-term use process, and the reliability of the variable damping shock absorber is ensured.

In another possible embodiment of the present invention, unlike the above preferred embodiment, the variable diameter groove 21 may be configured as an arc-shaped variable diameter groove as required by those skilled in the art. That is, the edge of the axial cross section of the diameter-varying groove 21 is formed in an arc shape.

In a further possible embodiment of the invention, unlike the preferred embodiment described above, the skilled person can also arrange the reducing groove 21 on the sleeve 1, with the inner friction ring 31 always against the outer wall of the plunger 1, as required.

In another possible embodiment of the present invention, unlike the above preferred embodiment, the variable diameter groove 21 may be provided as an annular groove of equal diameter by those skilled in the art according to the need.

In a further possible embodiment of the invention, unlike the preferred embodiment described above, the outer friction ring 32 can be provided in the form of: the outer friction ring 32 includes a plurality of friction plates that are equally spaced in the circumferential direction of the damping ring 3, and adjacent two friction plates are independent of each other. The friction plates are fixed to the outer end of the inner friction ring 31 by means of embedding, or one skilled in the art may fix the friction plates and the inner friction ring 31 together by any other feasible connection means, such as screw connection, welding, clamping, etc., as required. Further, the two ends of each friction plate are respectively provided with a convex tooth 322 described above. It will be appreciated by those skilled in the art that the friction plate may be made of any feasible material, such as elastomeric rubber, metal, porous polyurethane, etc.

In a further possible embodiment of the invention, unlike the preferred embodiment described above, the person skilled in the art can also arrange the damping ring 3 as a whole and provide openings in it, as required. That is, the inner friction ring 31 and the outer friction ring 32 are provided as one body, and the first opening 311 and the second opening 321 are integrally connected. At this time, the convex teeth 322 are formed on the side ends of both the inner friction ring 31 and the outer friction ring 32.

In a further possible embodiment of the present invention, unlike the preferred embodiment described above, the skilled person can also arrange the first opening 311 so that the inner friction ring 31 cannot form a split ring, if desired; and/or the second opening 321 is arranged such that the outer friction ring 32 cannot form a split ring.

Further, although not shown in the drawings, the present invention also provides a laundry treating apparatus including at least one of a drum washing machine, a drum dryer, a drum washer-dryer, a pulsator washing machine, a pulsator dryer, and a pulsator washer-dryer. The laundry treating apparatus further includes the variable damping shock absorber described above. The drum type washing machine will be described below as an example.

Exemplarily, the drum type washing machine includes a cabinet, an outer tub, an inner tub, a tension spring, and a variable damping damper. The top of the outer cylinder is connected with the top of the box body through a tension spring, and the bottom of the outer cylinder is connected with the bottom of the box body through a variable damping shock absorber. The inner cylinder is rotatably disposed in the outer cylinder. Since other structural features of the drum type washing machine are well known to those skilled in the art, they will not be described herein in detail.

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

1. A variable damping shock absorber is characterized by comprising a sleeve, a plunger and a damping ring;

an annular reducing groove is formed in the plunger, and the plunger is inserted into the sleeve in a sliding mode along the axial direction, so that the reducing groove is located in the sleeve all the time;

the damping ring is sleeved in the reducing groove, and the outer side end of the damping ring is abutted to the inner wall of the sleeve;

the damping ring is radially deformable so as to match a diameter of an inner end of the damping ring to a diameter of the reducing groove;

wherein the reducing groove is a stepped annular groove;

the damping ring is provided with an opening, and the damping ring can be radially enlarged as the opening is enlarged and radially reduced as the opening is reduced;

the damping ring comprises an inner friction ring in sliding connection with the plunger and an outer friction ring in sliding connection with the sleeve,

the opening comprises a first opening formed on the inner friction ring, the first opening forms the inner friction ring into a split ring;

the outer friction ring is sleeved outside the inner friction ring;

a plurality of protruding structures are respectively arranged at two side ends of the outer friction ring along the axial direction;

the plurality of protruding structures are strip-shaped structures extending along the radial direction, and the inner diameter of an annular structure formed by the plurality of protruding structures is slightly smaller than the outer diameter of the inner friction ring so as to prevent the inner friction ring from shaking axially relative to the outer friction ring.

2. The variable damping shock absorber according to claim 1, wherein the outer friction ring is an integrally formed ring-like structure.

3. The variable damping shock absorber of claim 2 wherein the opening further comprises a second opening formed in the outer friction ring, the second opening forming the outer friction ring into an open ring.

4. The variable damping shock absorber of claim 1 wherein the outer friction ring comprises a plurality of friction plates equally spaced circumferentially along the inner friction ring.

5. The variable damping shock absorber according to any one of claims 1 to 4, wherein the damping ring is made of an elastic material;

and/or the diameter of the reducing groove is gradually increased from the middle to two sides;

and/or the reducing grooves are symmetrically arranged along the radial direction.

6. A laundry treating apparatus, characterized in that the laundry treating apparatus comprises the variable damping shock absorber of any one of claims 1 to 5.

7. The laundry processing apparatus of claim 6, wherein the laundry processing apparatus includes at least one of a washing machine, a dryer, and a washer-dryer.