WO2020082981A1

WO2020082981A1 - Variable damping shock absorber and clothing processing device

Info

Publication number: WO2020082981A1
Application number: PCT/CN2019/108275
Authority: WO
Inventors: 赵志强; 许升; 尹俊明; 舒海
Original assignee: 青岛海尔滚筒洗衣机有限公司
Priority date: 2018-10-23
Filing date: 2019-09-26
Publication date: 2020-04-30
Also published as: CN111088659B; JP7141527B2; CN111088659A; JP2022505651A

Abstract

A variable damping shock absorber and a clothing processing device, the variable damping shock absorber comprising a sleeve cylinder (1), a plunger (2), and a damping ring (3). An annular variable diameter slot (21) is provided on the plunger (2), and the plunger (2) is slidably inserted into the sleeve cylinder (1) in the axial direction, such that the variable diameter slot (21) is always positioned inside the sleeve cylinder (1). The damping ring (3) is sleeved inside the variable diameter slot (21), and an outside end of the damping ring (3) abuts an inner wall of the sleeve cylinder (1). Openings (311, 321) are provided on the damping ring (3). By means of altering the sizes of the openings (311, 321), the size of the damping ring (3) in the radial direction can be altered, so as to match the diameter of the variable diameter slot (21). Relative to damping rings in the prior art, the damping ring (3) of the present variable damping shock absorber is effectively prevented from irreversibly deforming in thickness when being compressed in the radial direction for prolonged periods of time, thus ensuring the reliability of the shock absorber.

Description

Variable damping shock absorber and clothes processing equipment

Technical field

The invention belongs to the field of damping and damping devices, and specifically provides a variable damping shock absorber and clothes processing equipment.

Background technique

The existing drum washing machine mainly includes a box body, an outer cylinder and an inner cylinder. Among them, 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 to the top of the box body through a hanging spring, and the bottom of the outer cylinder is fixedly connected to the bottom of the box body through a shock absorber. The inner cylinder is rotatably provided in the outer cylinder.

During the operation of the washing machine, due to the uneven distribution of the clothes in the inner tub, the inner tub will drive the outer tub to shake up and down, left and right together when it rotates. The setting of hanging springs and shock absorbers can reduce the shaking strength and amplitude of the outer cylinder. In particular, the shock absorber can absorb and eliminate the vibration of the washing machine, prevent the washing machine from crawling, and reduce the noise of the washing machine, thereby ensuring the performance of the washing machine and extending the life of the washing machine.

However, the damping force generated by the shock absorber in the prior art is usually a constant value and cannot be adapted to all working conditions of the washing machine. When the washing machine performs high-speed dehydration, the amplitude generated by the outer tub is small and the required damping force is also small; when the washing machine performs washing, rinsing and low-speed dehydration, the amplitude generated by the outer tub is large and the required damping force is also large.

For this reason, a patent document with publication number CN1519418A discloses a shock absorber, which includes a cylinder, a piston rod inserted into the cylinder, and a movable damping member sleeved on the piston rod. Among them, the piston rod is provided with an annular groove for installing a movable damping member, and the diameter of the annular groove gradually increases from the middle to both sides. When the movable damping member is located in the middle position of the annular groove, the damping force between the movable damping member and the cylinder is small, which is used to eliminate the vibration generated when the washing machine is dehydrated at high speed; when the movable damping member is located in the annular At the two sides of the tank, the damping force between the movable damping member and the cylinder is large, which is used to eliminate the vibration generated during washing, rinsing, and low-speed dehydration of the washing machine.

However, during the long-term use of the shock absorber disclosed in the patent document with publication number CN1519418A, the movable damping member is easily deformed by both ends of the annular groove, and thus cannot be matched with the intermediate position of the annular groove , So that the shock absorber loses its damping effect when the washing machine dehydrates at high speed, thereby making the washing machine more noisy.

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

Summary of the invention

In order to solve the above problem in the prior art, that is, to solve the problem that the damping member of the existing variable damping shock absorber is easily deformed and failed, the present invention provides a variable damping shock absorber, the variable damping shock absorber includes Sleeve, plunger and damping ring; an annular reducing groove is formed on the plunger, the plunger is slidably inserted into the sleeve in the axial direction, so that the reducing groove is always located in the sleeve Inside the barrel; the damping ring is sleeved in the reducing groove, and the outer end of the damping ring is against the inner wall of the sleeve; the damping ring can be deformed in the radial direction to make the damping ring The diameter of the inside end of φ matches the diameter of the reducing groove.

In the above preferred technical solution of the variable damping shock absorber, the damping ring is provided with an opening, and the damping ring can become larger in the radial direction as the opening becomes larger and in the radial direction as the opening becomes smaller Radial becomes smaller.

In the above preferred technical solution of the variable damping shock absorber, the damping ring includes an inner friction ring slidingly connected with the plunger and an outer friction ring slidingly connected with the sleeve, and the opening includes A first opening on the inner friction ring, the first opening makes the inner friction ring form a split ring; the outer friction ring is sleeved on the outer side of the inner friction ring.

In the above preferred technical solution of the variable damping shock absorber, the outer friction ring is an integrally formed ring structure.

In the above preferred technical solution of the variable damping shock absorber, the opening includes a second opening formed on the outer friction ring, and the second opening makes the outer friction ring form a split ring.

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

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

In the above preferred technical solution 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 Increasing gradually from the middle to both sides; and / or, the reducing grooves are arranged symmetrically in the radial direction.

In addition, the present invention also provides a laundry treatment apparatus including the variable damping shock absorber according to any one of the above preferred embodiments.

In the above preferred technical solution of the laundry treatment apparatus, the laundry treatment apparatus includes at least one of a washing machine, a clothes dryer, and an integrated washing and drying machine.

A person skilled in the art can understand that, in a preferred technical solution of the present invention, by providing an annular reducing groove on the plunger and setting the damping ring to be able to deform in the radial direction, the diameter of the inner end of the damping ring It can be changed according to the diameter change of the reducing groove. Therefore, the radially deformable damping ring of the present invention can not only adapt to the diameter change of the reducing groove, but also effectively improve the reliability of the shock absorber compared with the conventional damping ring that cannot deform in the radial direction , And increased service life.

Those skilled in the art can understand that when the damping ring is located at a position with a small diameter in the reducing groove, the pressure of the damping ring on the sleeve is small, and the damping force generated between the two is also small; when the damping ring When it is located at a position with a large diameter in the reducing groove, the pressure of the damping ring on the sleeve is large, and the damping force generated between the two is also large.

Further, the damping ring of the present invention is provided with an opening. When the damping ring becomes larger in the radial direction, the opening becomes larger; when the damping ring becomes smaller in the radial direction, the opening becomes smaller. In other words, the damping ring of the present invention can achieve radial deformation by changing the size of the opening thereon. Therefore, compared with the damping ring in the prior art, the damping ring of the present invention effectively avoids the irreversible deformation in thickness when the damping ring is pressed for a long time in the radial direction, and ensures the reliability of the shock absorber Sex.

BRIEF DESCRIPTION

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

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

2 is a schematic structural explosion diagram of the variable damping shock absorber of the present invention;

Figure 3 is an enlarged view of part A in Figure 2;

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

5 is a cross-sectional view along B-B direction in FIG. 4;

FIG. 6 is an enlarged view of part C in FIG. 5;

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

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

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

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

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

List of reference signs:

1. Sleeve; 2. Plunger; 21. Reducing groove; 3. Damping ring; 31. Inner friction ring; 311, first opening; 32. Outer friction ring; 321, second opening; 322, convex teeth.

detailed description

Those skilled in the art should understand that the embodiments in this section are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention. For example, although the embodiment of this section takes the drum washing machine as an example to describe the variable damping shock absorber of the present invention, the variable damping shock absorber of the present invention can also be applied to any other feasible equipment, such as automobiles , Motorcycles, electric cars, bicycles, etc. A person skilled in the art may adjust it as needed to adapt to a specific application occasion, and the adjusted technical solution will still fall within the protection 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. The term indicating the direction or positional relationship is based on the direction or positional relationship shown in the drawings, which is only for convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", and "third" are for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

In addition, it should also be noted that, in the description of the present invention, unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a It is a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between the two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

As shown in FIGS. 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. Wherein, the plunger 2 is slidably inserted into the sleeve 1 in the axial direction, the damping ring 3 is disposed between the sleeve 1 and the plunger 2 in the radial direction, and the outer end (outer circumferential surface) of the damping ring 3 and the sleeve The inner wall of 1 abuts, and the inner end (inner circumferential surface) of the damping ring 3 abuts 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, which prevents the plunger 2 from sliding. Further, in order to avoid the abrasion of the damping ring 3 when sliding, the inner end and / or the outer end of the damping ring 3 are also provided with damping grease. Specifically, the damping grease may be provided on the inner end and / or the outer end of the damping ring 3 by coating.

As shown in FIGS. 1 and 2, the ends of the sleeve 1 and the plunger 2 that are away from each other are respectively provided with hinge rings (not shown in the figure), so that the sleeve 1 can be connected to other structures, devices or equipment through the hinge rings on the sleeve 1 With the pivotal connection, the plunger 2 can be pivotally connected with other structures, devices or equipment through the hinge ring thereon.

As shown in FIG. 2, FIG. 3, FIG. 5 and FIG. 6, the plunger 2 is provided with an annular reducing groove 21, and the diameter of the reducing groove 21 gradually increases from the middle to both sides. Further, the reducing groove 21 is a stepped annular groove. Furthermore, the reducing groove 21 is symmetrically arranged in the radial direction. Specifically, as shown in FIG. 3, the reducing groove 21 is bilaterally symmetrical in the up-down direction in FIG. 3, and the left and right parts of the reducing groove 21 are stepped annular grooves, respectively, and the diameters of the multiple steps are from the middle Increasing outwards.

For convenience of description, the right end of the reducing groove 21 in FIG. 6 is referred to as the first side end, and the left end of the reducing groove 21 in FIG. 6 is referred to as the second side end.

As shown in FIG. 6, the portion between the intermediate position of the reducing groove 21 and the first side end includes five annular grooves from left to right: D1, D2, D3, D4, and D5. The numerical relationship between the diameters of the five annular grooves is: D1 <D2 <D3 <D4 <D5. Similarly, the portion between the intermediate position of the reducing groove 21 and the second side end includes five annular grooves from right to left: D1, D2, D3, D4, and D5. Preferably, the two adjacent annular grooves are smoothly transitioned by arc chamfering, so that the damping ring 3 can smoothly move between the individual annular grooves.

A person skilled in the art can understand that the number of stepped annular grooves in the reducing groove 21 is not limited to the above five (D1, D2, D3, D4, and D5), but may be any other number. For example, two, three, four, six, seven, eight, etc.

In addition, in another feasible embodiment of the present invention, a person skilled in the art may also set the reducing groove 21 as an annular groove that smoothly transitions along the axis direction according to needs, preferably the cutting surface of the reducing groove 21 in the axial direction The edges are curved. Alternatively, the reducing groove 21 is provided as an equal-diameter annular groove.

As shown in FIGS. 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 the 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 Against the inner wall of the sleeve 1.

As shown in FIG. 3, a first opening 311 is formed on the inner friction ring 31, and the existence of the first opening 311 makes the inner friction ring 31 form a split ring. When the inner friction ring 31 is deformed in the radial direction and the diameter becomes larger, the first opening 311 becomes larger; when the inner friction ring 31 is deformed in the radial direction and the diameter becomes smaller, the first opening 311 becomes smaller.

3, a second opening 321 is formed on the outer friction ring 32. The presence of the second opening 321 makes the outer friction ring 32 form a split ring. When the outer friction ring 32 deforms in the radial direction and the diameter becomes larger, the second opening 321 becomes larger; when the outer friction ring 32 deforms in the radial direction and the diameter becomes smaller, the second opening 321 becomes smaller.

Continuing to refer to FIG. 3, the outer friction ring 32 is provided with a plurality of convex teeth 322 at both ends in the axial direction. The plurality of convex teeth 322 are arranged at equal intervals along the circumferential direction of the outer friction ring 32. It is not difficult to see from FIG. 3 that in the preferred embodiment of the present invention, the convex teeth 322 are strip-shaped convex structures, and the extension line of each convex tooth 322 intersects the axis of the outer friction ring 32.

As shown in FIGS. 3 and 6, the outer friction ring 32 can interpose the inner friction ring 31 in the middle through the convex teeth 322 on both sides thereof to prevent the inner friction ring 31 from shaking axially relative to the outer friction ring 32. Specifically, in the normal state, the length of each convex tooth 322 and the sum of the widths of the inner friction ring 31 and the outer friction ring 32 in the radial direction are equal or close to equal. Alternatively, a person skilled in the art may also make the inner diameter of the annular structure composed of a plurality of convex teeth 322 slightly smaller than the inner diameter of the inner friction ring 31 as needed. That is, the inner end of each convex tooth 322 is made closer to the axis of the inner friction ring 31 than the inner end of the 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 elastic materials. Illustratively, the material is porous polyurethane or elastic rubber. In addition, a person skilled in the art may also make the inner friction ring 31 made of metal as needed, for example, the inner friction ring 31 is provided as a C-shaped metal spring piece. Further, those skilled in the art can also make the outer friction ring 32 also made of metal as needed, for example, the outer friction ring 32 is provided as a C-shaped metal spring piece.

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 reducing groove 21, the convex teeth 322 will contact and collide with the side wall of the reducing groove 21 before the inner friction ring 31 and the outer friction ring 32. The side wall includes the side walls at both ends of the reducing groove 21 and the side walls of each annular groove (D1, D2, D3, D4, and D5) in the reducing groove 21. Since the convex teeth 322 are easier to deform than the inner friction ring 31 and the outer friction ring 32, when the convex teeth 322 collide with the side wall, they can quickly absorb the energy generated by the collision, which can reduce noise and avoid noise. produce.

The working principle of the variable damping shock absorber of the present invention will be described in detail below with reference to FIGS. 6 to 11 in combination with a drum washing machine.

It should be noted that the drum washing machine of the present invention includes a cabinet, an outer cylinder, an inner cylinder, a tension spring, and a variable damping shock absorber. Among them, the top of the outer cylinder is connected to the top of the box body through a tension spring, and the bottom of the outer cylinder is connected to the bottom of the box body through a variable damping shock absorber. The inner cylinder is rotatably provided 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 here.

As shown in FIG. 6, under normal conditions 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 outer cylinder sloshing decreases, the amplitude of the outer cylinder sloshing gradually increases, and the damping ring 3 gradually transitions from the reciprocating movement between D1-D1 to the reciprocating movement between D2-D2, from the D2-D2 The reciprocating movement gradually transitions 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 FIGS. 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. When the sleeve 1 and the plunger 2 slide relatively, no damping force is generated. The sleeve 1 and the plunger 2 can slide freely relative to each other. The damping force between the sleeve 1 and the plunger 2 is close to zero, denoted as F1.

As shown in FIGS. 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 does not occur pressure. The damping force generated when the sleeve 1 and the plunger 2 slide relatively is recorded as F2.

As shown in FIGS. 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 D3. The plunger 2 starts to squeeze the inner friction ring 31 radially outward, causing the inner friction ring 31 to deform in the radial direction, and the first opening 311 starts to become larger. The inner friction ring 31 having a larger diameter starts to squeeze the outer friction ring 32 radially outward, so that the outer friction ring 32 presses 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 recorded as F3.

As shown in FIGS. 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 squeezes the inner friction ring 31 outward in the radial direction, so that the deformation amount of the inner friction ring 31 increases, and the opening degree of the first opening 311 further becomes larger. In turn, the inner friction ring 31 further squeezes the outer friction ring 32, increasing the pressure of the outer friction ring 32 on the sleeve 1. At this time, the damping force generated when the sleeve 1 and the plunger 2 slide relatively is recorded as F4.

As shown in FIGS. 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 D5. The plunger 2 further squeezes the inner friction ring 31 radially outward, so that the deformation amount of the inner friction ring 31 increases again, and the opening degree of the first opening 311 becomes larger again. In turn, the inner friction ring 31 further squeezes the outer friction ring 32, which increases the pressure of the outer friction ring 32 against the sleeve 1 again. At this time, the damping force generated when the sleeve 1 and the plunger 2 slide relative to each other is recorded as F5.

A person skilled in the art can understand 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-mentioned process, so no more explanation is provided here.

Those skilled in the art can understand that since the diameters of D1, D2, D3, D4, and D5 become larger in sequence, the pressure applied to the sleeve 1 by the damper ring 3 at D1, D2, D3, D4, and D5 becomes larger in sequence. , So F1 <F2 <F3 <F4 <F5.

Those skilled in the art can understand that since D1, D2, D3, D4, and D5 all have a certain length, the damping force generated by the damping ring 3 at D1, D2, D3, D4, and D5 is constant. This structure is convenient for designers to calculate the size of F1, F2, F3, F4 and F5, so that designers can determine D1, D2, D3, D4 and D5 according to their needs, so that the variable damping shock absorber can adapt to the outer drum of the drum washing machine Various shaking frequencies and amplitudes.

Based on the above description, those skilled in the art can understand that in the present invention, by providing the first opening 311 on the inner friction ring 31 and the second opening 321 on the outer friction ring 32, the inner friction ring 31 can be changed in diameter The diameter of the groove 21 changes to squeeze or pull the outer friction ring 32 outwards, thereby changing the pressure of the outer friction ring 32 on the sleeve 1, and thus realizes the function of variable damping of the shock absorber's partial stroke. At the same time, the damping ring 3 of the present invention can prevent the irreversible deformation of the thickness of the damping ring 3 during the long-term use of the damping ring 3 compared with the conventional friction member without openings, and ensures the reliability of the variable damping shock absorber.

In another feasible embodiment of the present invention, different from the above preferred embodiment, a person skilled in the art may also set the reducing groove 21 into an arc-shaped reducing groove as needed. That is, the edge of the cross section of the reducing groove 21 in the axial direction is provided in an arc shape.

In yet another feasible embodiment of the present invention, unlike the above-mentioned preferred embodiment, a person skilled in the art may also arrange the reducing groove 21 on the sleeve 1 as needed, and make the inner friction ring 31 and the plunger The outer wall of 1 is always offset.

In yet another feasible embodiment of the present invention, unlike the above-mentioned preferred embodiment, a person skilled in the art may also set the variable-diameter groove 21 as an equal-diameter annular groove as needed.

In yet another feasible embodiment of the present invention, different from the above preferred embodiment, a person skilled in the art may also set the outer friction ring 32 as follows: the outer friction ring 32 includes a plurality of damping rings 3 The friction plates are equally spaced in the circumferential direction, and two adjacent friction plates are independent of each other. The multiple friction plates are respectively fixed to the outer end of the inner friction ring 31 by inlaying, or a person skilled in the art can also fix the multiple friction plates and the inner friction ring 31 together by any other feasible connection methods as needed. , Such as screw connection, welding, snapping, etc. Further, two protruding teeth 322 are provided on both ends of each friction plate. Those skilled in the art can understand that the friction plate can be made of any feasible material, such as elastic rubber, metal, porous polyurethane, and the like.

In yet another feasible embodiment of the present invention, unlike the above-mentioned preferred embodiment, a person skilled in the art may also set the damping ring 3 as a whole according to needs, and provide an opening thereon. That is, the inner friction ring 31 and the outer friction ring 32 are provided as a whole, and the first opening 311 and the second opening 321 are connected together. At this time, the convex teeth 322 are formed on the side ends of the inner friction ring 31 and the outer friction ring 32.

In yet another feasible embodiment of the present invention, unlike the above-mentioned preferred embodiment, a person skilled in the art may also set the first opening 311 so that the inner friction ring 31 cannot form an open ring as needed; and / or, The second opening 321 is provided so that the outer friction ring 32 cannot form a split ring.

In addition, although not shown in the figure, the present invention also provides a laundry treatment apparatus including a drum-type washing machine, a drum-type dryer, a drum-type washer-dryer, a pulsator-type washing machine, a wave At least one of a wheel dryer and a pulsator washer-dryer. The laundry treatment apparatus also includes the above-mentioned variable damping shock absorber. The drum-type washing machine will be exemplified below.

Exemplarily, the drum type washing machine includes a cabinet, an outer tub, an inner tub, a tension spring, and a variable damping shock absorber. Among them, the top of the outer cylinder is connected to the top of the box body through a tension spring, and the bottom of the outer cylinder is connected to the bottom of the box body through a variable damping shock absorber. The inner cylinder is rotatably provided 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 here.

So far, the technical solutions of the present invention have been described with reference to the preferred embodiments shown in the accompanying drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or replacements to the related technical features, and the technical solutions after these changes or replacements will fall within the protection scope of the present invention.

Claims

A variable damping shock absorber, characterized in that the variable damping shock absorber includes a sleeve, a plunger and a damping ring;

An annular reducing groove is formed on the plunger, and the plunger is slidably inserted into the sleeve in the axial direction so that the reducing groove is always located in the sleeve;

The damping ring is sleeved in the reducing groove, and the outer end of the damping ring is against the inner wall of the sleeve;

The damping ring can be deformed in the radial direction so that the diameter of the inner end of the damping ring matches the diameter of the reducing groove.
The variable damping shock absorber according to claim 1, wherein the damping ring is provided with an opening, and the damping ring can be enlarged in the radial direction as the opening becomes larger and with the opening Becomes smaller and becomes smaller in the radial direction.
The variable damping shock absorber according to claim 2, wherein the damping ring includes an inner friction ring slidingly connected to the plunger and an outer friction ring slidingly connected to the sleeve,

The opening includes a first opening formed on the inner friction ring, and the first opening makes the inner friction ring form a split ring;

The outer friction ring is sleeved on the outer side of the inner friction ring.
The variable damping shock absorber according to claim 3, wherein the outer friction ring is an integrally formed ring structure.
The variable damping shock absorber according to claim 4, wherein the opening further comprises a second opening formed on the outer friction ring, the second opening forming the outer friction ring as a split ring.
The variable damping shock absorber according to claim 3, wherein the outer friction ring includes a plurality of friction plates arranged at equal intervals in the circumferential direction of the inner friction ring.
The variable damping shock absorber according to claim 3, wherein the two lateral ends of the outer friction ring in the axial direction are respectively provided with a plurality of convex structures.
The variable damping shock absorber according to any one of claims 1 to 7, wherein 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 gradually increases from the middle to both sides;

And / or, the reducing grooves are symmetrically arranged in the radial direction.
A laundry treatment apparatus, characterized in that the laundry treatment apparatus includes the variable damping shock absorber according to any one of claims 1 to 8.
The laundry processing apparatus according to claim 9, wherein the laundry processing apparatus includes at least one of a washing machine, a clothes dryer, and an integrated washer-dryer.