CN111088659B - Variable damping shock absorber and clothes treatment equipment - Google Patents

Abstract

The invention belongs to the field of damping and shock absorption devices, and in particular provides a variable damping shock absorber and clothing processing equipment. The invention aims to solve the problem that the damping member of the existing variable damping shock absorber is easy to deform and fail. To this end, the variable damping shock absorber of the present invention includes a sleeve, a plunger and a damping ring. Wherein, the plunger is provided with an annular reducing groove, and the plunger is slidably inserted into the sleeve along 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 in contact with the inner wall of the sleeve. The damping ring is provided with an opening, and the damping ring can change the size in the radial direction by changing the size of the opening, and then can match the diameter of the diameter reducing groove. Therefore, compared with the damping ring in the prior art, the damping ring of the present invention effectively avoids the irreversible deformation in the thickness of the damping ring when the damping ring is pressed for a long time in the radial direction, and ensures the reliability of the shock absorber. sex.

Description

Variable Damping Shock Absorbers and Clothes Treatment Equipment

technical field

The invention belongs to the field of damping and shock absorption devices, and in particular provides a variable damping shock absorber and clothing processing equipment.

Background technique

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

During the working process of the washing machine, due to the uneven distribution of the clothes in the inner drum, the inner drum will drive the outer drum to shake up and down, left and right together when the inner drum rotates. The setting of the hanging spring and the shock absorber can reduce the shaking intensity 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 prolonging the life of the washing machine.

However, the damping force generated by the shock absorber in the prior art is usually a constant value, which cannot adapt to all working conditions of the washing machine. When the washing machine is performing high-speed dehydration, the outer cylinder can generate a small amplitude and the required damping force is also small; when the washing machine is performing washing, rinsing, and low-speed dehydration, the outer cylinder can generate a large amplitude and requires a large damping force.

To this end, 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. Wherein, the piston rod is provided with an annular groove for installing the 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 dewatered at high speed; when the movable damping member is located in the annular groove When the two sides of the tank are located, the damping force between the movable damping member and the cylinder is relatively 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 the two ends of the annular groove, so that it cannot match the middle position of the annular groove. , so that the shock absorber loses its damping effect when the washing machine is dehydrated at high speed, which in turn makes the washing machine noisy.

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.

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 easy to deform and fail, the present invention provides a variable damping shock absorber, the variable damping shock absorber comprises: 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 in contact with the inner wall of the sleeve; the damping ring can be deformed in the radial direction so as to make the damping ring The diameter of the inside end matches the diameter of the reducing groove.

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

In the preferred technical solution of the above variable damping shock absorber, the damping ring includes an inner friction ring slidably connected with the plunger and an outer friction ring slidably connected with the sleeve, and the opening includes an inner friction ring formed in the The 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 integral annular structure.

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

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

In the preferred technical solution of the above variable damping shock absorber, the damping ring is made of elastic material; and/or the variable diameter groove is a stepped annular groove; and/or the diameter of the variable diameter groove is It gradually increases 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 device comprising the variable damping shock absorber according to any one of the above preferred embodiments.

In a preferred technical solution of the above-mentioned clothes treating device, the clothes treating device includes at least one of a washing machine, a clothes dryer and an all-in-one washing and drying machine.

Those skilled in the art can understand that, in the preferred technical solution of the present invention, by arranging an annular reducing groove on the plunger, and arranging the damping ring to be able to deform in the radial direction, the diameter of the inner end of the damping ring is 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 improves the reliability of the shock absorber compared with the traditional damping ring that cannot be deformed in the radial direction. , and improved service life.

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

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 its upper opening. Therefore, compared with the damping ring in the prior art, the damping ring of the present invention effectively avoids the irreversible deformation in the thickness of the damping ring when the damping ring is pressed for a long time in the radial direction, and ensures the reliability of the shock absorber. sex.

Description of drawings

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

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

Fig. 2 is the structural exploded schematic diagram of the variable damping shock absorber of the present invention;

Fig. 3 is the enlarged view of A part in Fig. 2;

Figure 4 is a front view of the variable damping shock absorber in Figure 1;

Fig. 5 is the sectional view along the B-B direction in Fig. 4;

Fig. 6 is the enlarged view of C part in Fig. 5;

Fig. 7 is the sectional view along E-E direction in Fig. 6;

Figure 8 is a cross-sectional view along the F-F direction in Figure 6;

Fig. 9 is the sectional view along G-G direction in Fig. 6;

Figure 10 is a cross-sectional view along the H-H direction in Figure 6;

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

List of reference numbers:

1. Sleeve; 2. Plunger; 21. Reducing groove; 3. Damping ring; 31. Inner friction ring; 311, First opening; 32, Outer friction ring; 321, Second opening;

Detailed ways

It should be understood by those skilled in the art that the embodiments in this section are only used to explain the technical principles of the present invention, and are not used to limit the protection scope of the present invention. For example, although the embodiment of this section takes a 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 vehicles, bicycles, etc. Those skilled in the art can adjust it as needed to adapt to specific application occasions, 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. Terms indicating a direction or positional relationship are based on the direction or positional relationship 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 particular orientation, be constructed and operate in a particular orientation, Therefore, it should not be construed as a limitation of the present invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In addition, it should also be noted that, in the description of the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a It is a detachable connection, or an integral connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the internal communication of 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 . The plunger 2 is slidably inserted into the sleeve 1 in the axial direction, the damping ring 3 is arranged between the sleeve 1 and the plunger 2 in the radial direction, and the outer end (outer circumferential surface) of the damping ring 3 is connected to the sleeve 1. The inner wall of 1 abuts against, and the inner end (inner circumferential surface) of damping ring 3 abuts against the outer wall (outer side wall) of 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 prevent the plunger 2 from sliding. Further, in order to prevent the damping ring 3 from being worn during sliding, damping grease is also provided on the inner end and/or the outer end of the damping ring 3 . 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 Figures 1 and 2, the ends of the sleeve 1 and the plunger 2 away from each other are respectively provided with hinge rings (not shown in the figure), so that the sleeve 1 can communicate with other structures, devices or equipment through the hinge rings on it. The pivotal connection allows the plunger 2 to be pivotally connected to other structures, devices or equipment through a hinged 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 along the middle to both sides. Further, the diameter reducing groove 21 is a stepped annular groove. Furthermore, the diameter reducing grooves 21 are arranged symmetrically along the radial direction. Specifically, as shown in FIG. 3 , the diameter-reducing groove 21 is left-right symmetrical along the up-down direction in FIG. 3 , and the left and right parts of the diameter-reducing groove 21 are respectively stepped annular grooves, and the diameters of the plurality of steps are from the middle increase outwards.

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

As shown in FIG. 6 , the portion between the middle 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. Likewise, the portion between the middle 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 arc-shaped chamfering is used for smooth transition between two adjacent annular grooves, so that the damping ring 3 can move smoothly between the annular grooves.

Those 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 can also be any other number. For example, two, three, four, six, seven, eight, etc.

In addition, in another feasible embodiment of the present invention, those skilled in the art can also set the reducing groove 21 as an annular groove with a smooth transition in the axial direction, preferably the cutting surface of the reducing groove 21 along the axial direction. The edges are curved. Alternatively, the reducing grooves 21 are provided as annular grooves of equal diameter.

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 is sleeved. 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 deforms in the radial direction and the diameter becomes larger, the first opening 311 becomes larger; when the inner friction ring 31 deforms in the radial direction and the diameter becomes smaller, the first opening 311 becomes smaller.

Continuing to refer to FIG. 3 , a second opening 321 is formed on the outer friction ring 32 , and the existence 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 , two ends of the outer friction ring 32 in the axial direction are respectively provided with a plurality of protruding teeth 322 . The plurality of protruding 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 protruding teeth 322 are strip-shaped protruding structures, and the extension line of each protruding tooth 322 intersects the axis of the outer friction ring 32 .

As shown in FIGS. 3 and 6 , the outer friction ring 32 can clamp the inner friction ring 31 in the middle through the protruding teeth 322 on both sides of the outer friction ring 32 to prevent the inner friction ring 31 from shaking relative to the outer friction ring 32 in the axial direction. Specifically, under normal conditions, the length of each protruding tooth 322 is equal to or nearly equal to the sum of the radial widths of the inner friction ring 31 and the outer friction ring 32 . Alternatively, those skilled in the art can also make the inner diameter of the annular structure formed by the plurality of protruding teeth 322 slightly smaller than the inner diameter of the inner friction ring 31 as required. That is, the inner side end of each protruding tooth 322 is made closer to the axis of the inner friction ring 31 than the inner side end of the inner friction ring 31 .

Further, in a 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 cellular polyurethane or elastic rubber. In addition, those skilled in the art can also make the inner friction ring 31 made of metal as required, for example, the inner friction ring 31 is set as a C-shaped metal spring sheet. Further, those skilled in the art can also make the outer friction ring 32 also made of metal as required, for example, the outer friction ring 32 is set as a C-shaped metal spring sheet.

It should be noted that, in the preferred embodiment of the present invention, the protruding teeth 322 can play the role of noise reduction and noise reduction. Specifically, during the movement of the damping ring 3 in the reducing groove 21 , the protruding 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 walls include the side walls of 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 more easily deformed than the inner friction ring 31 and the outer friction ring 32, when the convex teeth 322 collide with the side wall, the energy generated by the collision can be quickly absorbed, thereby reducing noise and avoiding 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 the drum washing machine.

Before that, it should be noted that the front-loading washing machine of the present invention includes a box body, an outer tub, an inner tub, a tension spring and a variable damping shock absorber. Wherein, 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 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 further here.

As shown in FIG. 6 , under normal conditions and when the shaking frequency of the outer cylinder is high, the amplitude of the shaking of the outer cylinder is small, and the damping ring 3 reciprocates between D1-D1. As the frequency of the shaking of the outer cylinder decreases, the amplitude of the shaking of the outer cylinder gradually increases, and the damping ring 3 gradually transitions from the reciprocating movement between D1-D1 to the reciprocating movement between D2-D2, and from the reciprocating movement between 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 gradually transitions from the reciprocating movement between D4-D4 to 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 . No damping force is generated when the sleeve 1 and the plunger 2 slide relative to each other. The sleeve 1 and the plunger 2 can slide freely relative to each other. The damping force between sleeve 1 and plunger 2 is close to zero, denoted as F1.

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

As shown in Figures 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 begins to press the inner friction ring 31 radially outward, so that the inner friction ring 31 is deformed in the radial direction, and the first opening 311 begins to become larger. The inner friction ring 31 with the enlarged diameter begins to press 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 presses the inner friction ring 31 outward in the radial direction, so that the deformation amount of the inner friction ring 31 is increased, and the opening degree of the first opening 311 is further increased. Further, the inner friction ring 31 further presses the outer friction ring 32, and the pressure of the outer friction ring 32 on the sleeve 1 is increased. At this time, the damping force generated when the sleeve 1 and the plunger 2 slide relative to each other is recorded as F4.

As shown in Figures 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 presses the inner friction ring 31 radially outward, so that the deformation of the inner friction ring 31 increases again, and the opening degree of the first opening 311 increases again. Then, the inner friction ring 31 further presses 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 recorded as 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 opposite to the above-mentioned process, so no further explanation is given 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 by the damping ring 3 to the sleeve 1 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 sizes 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 front-loading washing machine. various shaking frequencies and amplitudes.

Based on the above description, those skilled in the art can understand that, in the present invention, the first opening 311 is provided on the inner friction ring 31 and the second opening 321 is provided on the outer friction ring 32, so that the inner friction ring 31 can be changed with the diameter of the inner friction ring 31. The diameter of the groove 21 changes and the outer friction ring 32 is squeezed outward or pulled inward, thereby changing the pressure of the outer friction ring 32 on the sleeve 1, and thus realizing the function of changing the damping of the shock absorber by split stroke. At the same time, the damping ring 3 of the present invention can avoid irreversible thickness deformation of the damping ring 3 in the long-term use process compared with the traditional friction parts without openings, thus ensuring the reliability of the variable damping shock absorber.

In another feasible embodiment of the present invention, which is different from the above-mentioned preferred embodiment, those skilled in the art can also set the reducing groove 21 as an arc-shaped reducing groove as required. That is, the edge of the cross section of the reducing groove 21 in the axial direction is provided in an arc shape.

In another feasible embodiment of the present invention, which is different from the above-mentioned preferred embodiment, those skilled in the art can also set the reducing groove 21 on the sleeve 1 as required, and connect the inner friction ring 31 to the plunger The outer walls of 1 always touch each other.

In another feasible embodiment of the present invention, which is different from the above-mentioned preferred embodiment, those skilled in the art can also set the variable diameter groove 21 as an annular groove of equal diameter as required.

In another feasible embodiment of the present invention, which is different from the above-mentioned preferred embodiment, those skilled in the art can also set the outer friction ring 32 in the following form as required: The friction plates are equally spaced in the circumferential direction, and the two adjacent friction plates are independent of each other. The plurality of friction plates are respectively fixed to the outer end of the inner friction ring 31 by inlaying, or those skilled in the art can also fix the plurality of friction plates and the inner friction ring 31 together by any other feasible connection method as required. , such as screw connection, welding, snap connection, etc. Further, both ends of each friction plate are respectively provided with one of the above-mentioned protruding teeth 322 . 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 another feasible embodiment of the present invention, which is different from the above-mentioned preferred embodiment, those skilled in the art can also set the damping ring 3 as a whole and set an opening thereon as required. 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 as a whole. At this time, the protruding 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, different from the above-mentioned preferred embodiment, those skilled in the art can also set the first opening 311 as required so that the inner friction ring 31 cannot form a split ring; and/or, The second opening 321 is arranged 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 device, the laundry treatment device includes a drum-type washing machine, a drum-type dryer, a drum-type washer-dryer, a pulsator washing machine, At least one of a wheel dryer and a pulsator washer-dryer. The laundry treating apparatus further includes the variable damping shock absorber described above. The following is an example of a drum type washing machine.

Exemplarily, a drum type washing machine includes a case, an outer tub, an inner tub, a tension spring and a variable damping shock absorber. Wherein, 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 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 further here.

So far, the technical solutions of the present invention have been described with reference to the preferred embodiments shown in the accompanying drawings, however, those skilled in the art can easily understand that the protection scope 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 substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (7)

1. A variable damping shock absorber, wherein the variable damping shock absorber comprises 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 along 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 in contact with 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; Wherein, the reducing groove is a stepped annular groove; 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 becomes smaller in the radial direction as the opening becomes smaller; The damping ring includes an inner friction ring slidably connected with the plunger and an outer friction ring slidably connected with the sleeve, the opening includes a first opening formed on the inner friction ring, the first opening causing the inner friction ring to form a split ring; the outer friction ring is sleeved on the outer side of the inner friction ring; A plurality of protruding structures are respectively provided on the two side ends along the axial direction of the outer friction ring; The plurality of raised structures are all radially extending strip structures, and the inner diameter of the annular structure formed by the plurality of raised structures is slightly smaller than the outer diameter of the inner friction ring to prevent the inner friction rings from opposing each other. Shaking in the axial direction occurs on the outer friction ring. 2 . The variable damping shock absorber according to claim 1 , wherein the outer friction ring is an annular structure formed integrally. 3 . 3 . The variable damping shock absorber of claim 2 , wherein the opening further comprises a second opening formed on the outer friction ring, the second opening making the outer friction ring form an opening ring. 4 . The variable damping shock absorber according to claim 1 , wherein the outer friction ring comprises a plurality of friction plates arranged at equal intervals along the circumference of the inner friction ring. 5 . 5. The variable damping shock absorber according to any one of claims 1 to 4, wherein the damping ring is made of elastic material; And/or, the diameter of the reducing groove gradually increases from the middle to both sides; And/or, the reducing grooves are arranged symmetrically in the radial direction. 6 . A clothes treating apparatus, characterized in that, the clothes treating apparatus comprises the variable damping shock absorber according to any one of claims 1 to 5 . 7 . 7. The clothes treating apparatus according to claim 6, wherein the clothes treating apparatus comprises at least one of a washing machine, a clothes dryer and an all-in-one washer and dryer.

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