CN107151894A - A kind of damper and washing machine for washing machine - Google Patents

Abstract

The invention provides a shock absorber for a washing machine and a washing machine, comprising a guide sleeve and a plunger structure, one end of the plunger structure is inserted into the guide sleeve, and the guide sleeve and the plunger structure surround A first gas buffer chamber is formed, and the shock absorber also includes a second gas buffer chamber communicated with the first gas buffer chamber. A one-way valve plate that opens in the direction of the second gas buffer chamber. By setting the connected first gas buffer chamber and the second gas buffer chamber, and setting the one-way valve plate, the buffer function of the shock absorber is increased, and the vibration is reduced; and the gas in the second gas buffer chamber has a reaction to the plunger structure Offset the force in the compression direction of part of the plunger structure, which is beneficial to slow down the movement range of the plunger structure; by setting two gas buffer chambers, more vibration energy can be consumed to achieve the effect of shock absorption and noise reduction.

Description

Shock absorber for washing machine and washing machine

technical field

The invention belongs to the technical field of washing machines and accessories thereof, and in particular relates to a shock absorber for a washing machine and a washing machine with the shock absorber.

Background technique

Existing drum washing machines include a casing forming an appearance, an outer cylinder set in the casing for storing washing water, and a drum rotatably set in the outer casing for washing and dehydrating clothes. The back of the cylinder is fixed with a motor for driving the drum to rotate; the outer cylinder and the box are connected by a shock absorber to suppress the vibration of the outer cylinder. The shock absorber can absorb and eliminate vibration, prevent the box from crawling, and reduce noise. It is an important device to ensure the performance of the washing machine and prolong the life of the washing machine.

From the point of view of the entire laundry process of the washing machine, vibrations are generated in all stages of washing, rinsing, and dehydration. During the rotation of the drum, the eccentric load caused by the uneven distribution of the clothes after washing will be generated, resulting in increased vibration; especially in the dehydration process, due to the large change in the rotational speed, the operating frequency will also change in a large range. For example, the rotation speed of the drum of the drum washing machine is from 0 to 1600r/min, that is, the operating frequency varies between 0-27Hz, and the natural frequency of the drum washing machine is about 2HZ, and it increases slightly within a certain range as the clothes are dehydrated. That is, during the dehydration process, the natural frequency of the washing machine is within the variation range of the operating frequency. When the operating frequency is equal to or close to the natural frequency, the amplitude and vibration of the washing machine will increase.

The existing drum washing machine shock absorber is shown in Figure 1, which is generally a plunger type shock absorber (or piston type shock absorber), including a damping guide sleeve 01, a plunger 02, a friction plate 03 (or a friction damping ring ) and lubricating grease. The damping guide sleeve 01 is provided with an air vent 011 communicating with the outside world, one end of the damping guide sleeve 01 is connected to the outer cylinder of the washing machine, and the other end is provided with an opening; one end of the plunger 02 is inserted into the damping guide sleeve 01, and the plunger The other end of 02 is connected to the cabinet of the washing machine. The damping force generated when the existing shock absorber works depends on the friction between the plunger 02, the damping guide sleeve 01, and the friction plate 03; the existing washing machine shock absorber mainly relies on the friction to buffer and Consume the vibration energy of the washing machine during washing and dehydration, and the vibration reduction effect is not good, resulting in a large vibration when the washing machine is washing clothes; especially during the dehydration process, there will be severe vibration and accompanied by loud noise.

Contents of the invention

The invention provides a shock absorber for a washing machine, which adds a gas buffer chamber to achieve better shock and noise reduction effects when the washing machine vibrates greatly.

In order to achieve the above-mentioned technical purpose, the present invention adopts the following technical solutions to realize:

A shock absorber for a washing machine, comprising a guide sleeve and a plunger structure, one end of the plunger structure is inserted into the guide sleeve, and a first gas buffer chamber is formed around the guide sleeve and the plunger structure ; The shock absorber also includes a second gas buffer chamber communicated with the first gas buffer chamber, between the first gas buffer chamber and the second gas buffer chamber there is a Open check valve.

Further, when the vibration force received by the shock absorber is relatively large, the reciprocating speed of the plunger structure in the guide sleeve increases, so that the gas pressure in the first gas buffer chamber increases enough to push the The one-way valve is opened, so that part of the gas in the first gas buffer chamber enters the second gas buffer chamber, and the plunger structure is also subjected to the reaction force given by the gas in the second gas buffer chamber.

Further, the shock absorber further includes a shock absorber spring, one end of which is arranged on the guide sleeve, and the other end is arranged on the plunger structure.

Further, a valve leaf spring is arranged in the second gas buffer chamber, and the valve leaf spring exerts a force in a closing direction on the one-way valve plate.

Further, the valve leaf spring is cylindrical or conical.

Further, a matching guide structure for the movement of the one-way valve plate is provided between the one-way valve plate and the second gas buffer chamber.

Further, the guide structure is a guide column arranged on one of the one-way valve plate and the second gas buffer chamber, and a guide post arranged on the other one of the one-way valve plate and the second gas buffer chamber and A guide groove that matches the guide post, and the guide post is located in the guide groove.

Further, there are more than two guide posts or guide grooves, and more than two guide posts or guide grooves are evenly distributed along the circumference.

Further, the second gas buffer chamber has a first top wall adjacent to the gas buffer chamber, a bottom wall parallel to the top wall, and a peripheral wall sealingly connecting the top wall and the bottom wall, so A through hole communicating with the first gas buffer chamber is opened on the top wall, and the one-way valve plate can be opened and closed to seal the through hole.

Further, the valve plate spring is arranged between the one-way valve plate and the bottom wall.

Further, the second gas buffer chamber is provided with a pressure relief hole communicating with the outside world.

Further, a pressure relief valve is provided on the pressure relief hole.

Further, the plunger structure includes a cylindrical plunger body matched with the guide sleeve, the second gas buffer chamber adjacent to the plunger body, and the second gas buffer chamber. The chamber adjoins the first fixed end.

Further, the bottom of the plunger body is provided with a through hole communicating with the second gas buffer chamber.

Further, a friction plate is provided between the guide sleeve and the plunger structure.

Based on the above-mentioned shock absorber for a washing machine, the present invention also provides a washing machine with the above-mentioned shock absorber, which is used to improve the problem of severe vibration and accompanying loud noise during laundry dehydration.

A washing machine includes a box body, an outer cylinder arranged in the box body, and the above-mentioned shock absorber connecting the box body and the outer cylinder.

Further, the guide sleeve is hinged to the outer cylinder, and the plunger structure is hinged to the box.

The shock absorber used in the washing machine provided by the present invention is provided with a connected first gas buffer chamber and a second gas buffer chamber, and a one-way valve plate is arranged between the first gas buffer chamber and the second gas buffer chamber, so that When the shock absorber is subjected to a relatively large vibration force, the reciprocating speed of the plunger structure in the guide sleeve is relatively high, and when the plunger structure is compressed, the pressure of the gas in the first gas buffer chamber is sufficient to push the The one-way valve allows part of the gas in the first gas buffer chamber to enter the second gas buffer chamber to increase the buffer function of the shock absorber and reduce vibration; and to increase the gas pressure in the second gas buffer chamber and have a positive impact on the plunger structure. The reaction force offsets part of the force in the compression direction of the plunger structure, which is conducive to slowing down the movement range of the plunger structure; in this way, by setting up two gas buffer chambers, more vibration energy can be consumed to achieve the effect of shock absorption and noise reduction. When the shock absorber is subjected to a small vibration force, the plunger structure reciprocates in the guide sleeve, and the plunger structure compresses the gas pressure generated by the first gas buffer chamber, so that the one-way valve cannot be pushed open ; That is, when the shock absorber is subject to a small vibration force, the second gas buffer chamber does not participate in the shock absorption work.

Other characteristics and advantages of the present invention will become clearer after reading the detailed description of the present invention in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is the structural representation of the shock absorber of washing machine in the prior art;

Fig. 2 is a structural schematic diagram of a first embodiment of a shock absorber for a washing machine proposed by the present invention;

Fig. 3 is a schematic diagram of a cross-sectional structure along A-A in Fig. 2;

Fig. 4 is the enlarged schematic diagram of the plunger structure in Fig. 2;

Fig. 5 is a schematic structural view of a second embodiment of the shock absorber for a washing machine proposed by the present invention;

FIG. 6 is a schematic diagram of an enlarged structure of area B in FIG. 5 .

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "left", "right", etc. is based on the positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation should therefore not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

Referring to Fig. 2-Fig. 4, it is the first embodiment of the shock absorber for the washing machine proposed by the present invention, the shock absorber is arranged between the cabinet and the outer cylinder of the washing machine, for suppressing the vibration of the outer cylinder, To reduce noise, the washing machine can be a drum washing machine or other types of washing machines. In this embodiment, the shock absorber includes a guide sleeve 1 and a plunger structure 2, and one end of the plunger structure 2 is inserted into the guide sleeve 1; in this way, the guide sleeve 1 and the plunger structure 2 surround and form a first gas buffer chamber 4. When the plunger structure 2 moves in the guide sleeve 1 , the plunger structure 2 compresses the gas in the first gas buffer chamber 4 . The shock absorber is also provided with a second gas buffer chamber 5, wherein the second gas buffer chamber 5 communicates with the first gas buffer chamber 4, and is provided between the first gas buffer chamber 4 and the second gas buffer chamber 5 The one-way valve plate 6, the one-way valve plate 6 can only be opened toward the direction of the second gas buffer chamber 5 . That is to say, when the plunger structure 2 compresses the gas in the first gas buffer chamber 4 so that the gas pressure in the first gas buffer chamber 4 is sufficiently high, the one-way valve plate 6 is pushed open so that the gas in the first gas buffer chamber 4 Part of the gas enters the second gas buffer chamber 5.

During the washing process of the washing machine, especially during dehydration, the vibration of the outer cylinder is relatively large, that is, the vibration force received by the shock absorber is relatively large, and the vibration force is transmitted to the shock absorber, so that the plunger structure 2 is in the direction of the guide sleeve. The speed of reciprocating movement in 1 is relatively high, and the plunger structure 2 compresses the gas in the first gas buffer chamber 4, that is, when the plunger structure 2 moves to the right in the figure, the gas pressure in the first gas buffer chamber 4 is enough to push Open the one-way valve plate 6, at this time, part of the gas in the first gas buffer chamber 4 enters the second gas buffer chamber 5, and the gas pressure in the first gas buffer chamber 4 decreases, so that the plunger structure 2 can continue to compress and move, The energy of the vibration is further consumed, the buffer function of the shock absorber is increased, and the vibration of the washing machine is reduced; and part of the gas in the first gas buffer chamber 4 enters the second gas buffer chamber 5, so that the gas in the second gas buffer chamber 5 The pressure increases, so the second gas buffer chamber 5 has a certain reaction force on the plunger structure 2, that is, the force in the left direction in the figure, which offsets the force in the compression direction received by part of the plunger structure 2, which is conducive to slowing down the plunger structure. The range of motion of the structure 2; and when the plunger structure 2 is reset and moved, the one-way valve plate 6 is closed, so that the reaction force of the second gas buffer chamber 5 for the plunger structure 2 disappears, and the reaction force is avoided for the reset movement of the plunger structure 2 The 3 pushes further achieve the shock absorption effect. In this way, by setting two gas buffer chambers, more vibration energy can be consumed to achieve the effect of shock and noise reduction.

During the washing and rinsing process of the washing machine, the rotation speed is below 60r/min, and the working frequency is around 1HZ, that is, the working frequency is below the natural frequency of the washing machine (about 2HZ); therefore, the washing machine vibrates more during the washing and rinsing process. Small, the reciprocating speed of the plunger structure 2 is also small, at this time, the gas pressure generated by the plunger structure 2 compressing the first gas buffer chamber 4 cannot push the one-way valve plate 6; When the shock force is high, the shock absorber mainly relies on the friction force generated by the friction plate between the plunger structure 2 and the guide sleeve 1, and the gas damping and shock absorption in the first gas buffer chamber 4, and the second gas buffer chamber 5 does not participate in the shock absorption. damping.

During the dehydration process of the washing machine, the rotation speed of the inner drum will gradually increase from 0r/min to 1600r/min. After the dehydration is completed, the rotation speed of the inner drum will gradually decrease from 1600r/min to 0r/min. The working frequency will vary from 1 to 27HZ. The frequency will pass through the natural frequency, so that the vibration of the washing machine is particularly large; at this time, when the gas pressure in the first gas buffer chamber 4 reaches a certain value, the one-way valve plate 6 will be pushed open, so that the first gas buffer chamber 4 and the second gas buffer chamber Two gas buffer chambers 5 cooperate to play better damping effect.

In this embodiment, as shown in FIG. 2 and FIG. 3 , the guide sleeve 1 is a sealed cavity with an open end, and the open end is used for the insertion of the plunger structure 2, that is, the first gas buffer chamber 4 passes through the guide sleeve 1 Pressure release between the plunger structure 2 and the pressure release to the second gas buffer chamber 5 by pushing open the one-way valve plate 6 .

3 and 4, the second gas buffer chamber 5 is provided with a pressure relief hole 51 communicating with the outside world, so that the gas in the first gas buffer chamber 4 enters the second gas buffer chamber 5, and the second gas buffer chamber After the pressure in the chamber 5 is increased, the pressure is released through the pressure relief hole 51, so that the pressure in the second gas buffer chamber 5 is restored. And when the reciprocating frequency of the plunger structure 2 is high, when the pressure in the second gas buffer chamber 5 has not been released through the pressure relief hole 51, that is, the pressure in the second gas buffer chamber 5 has not yet been released. Reduce to the original position; the plunger structure 2 compresses and moves again, and at this time, the gas pressure in the first gas buffer chamber 4 is correspondingly higher to push the one-way valve 6; and after the one-way valve 6 is pushed open The reaction of the second gas buffer chamber 5 to the plunger structure 2 also increases, so that when the frequency of the reciprocating motion of the plunger structure 2 is different, the first gas buffer chamber 4 and the second gas buffer chamber 5 can automatically adjust for the plunger structure 2 damping, or resistance.

Referring to Fig. 2 and Fig. 3, in order to further increase the damping function of the shock absorber and avoid the failure of the shock absorber when the movement range is too large, the shock absorber also includes a shock absorber spring 7, and one end of the shock absorber spring 7 is arranged on the guide On the sleeve 1, the other end is set on the plunger structure 2, and the shock absorber shock spring 7; that is, when the shock absorber is subjected to a shock force, the plunger structure 2 is compressed or stretched, and the shock absorber spring 7 is Compressed or elongated, the damping spring 7 gives the plunger structure 2 a force in the opposite direction of movement, and suppresses the large-scale vibration of the plunger structure 2 .

In this embodiment, as shown in FIG. 2 and FIG. 3 , a valve spring 8 is arranged in the second gas buffer chamber 5 , and the valve spring 8 exerts a force in the closing direction on the one-way valve 6 . The one-way valve plate 6 is automatically reset under the push of the valve plate spring 8 by setting the valve plate spring 8 . When the gas pressure in the first gas buffer chamber 4 reaches the sum of the gas pressure in the second gas buffer chamber 5 and the pulling force of the valve spring 8 on the one-way valve 6 , the one-way valve 6 will be pushed open. The valve plate spring 8 is a cylindrical spring.

In this embodiment, referring to Fig. 4-shown in Fig. 6, the second gas buffer chamber 5 has a top wall 52 adjacent to the first gas buffer chamber 4, a bottom wall 53 arranged parallel to the top wall 52, and a sealed connection The top wall 52 and the peripheral wall 54 of the bottom wall 53 are provided with a through hole 9 communicating with the first gas buffer chamber 4 on the top wall 52 , and the sealing through hole 9 of the one-way valve plate 6 can be opened and closed. The valve plate spring 8 is arranged between the bottom wall 53 and the one-way valve plate 6, so that when the one-way valve plate 6 is pushed open, the one-way valve plate 6 moves toward the inside of the second gas buffer chamber 5 as a whole, or in other words The opening direction moves, and when the one-way valve plate 6 is closed, the one-way valve plate 6 moves in the closing direction as a whole. In this way, the gas entering the second gas buffer chamber 5 from the first gas buffer chamber 4 flows into the second gas buffer chamber 5 through the inside of the one-way valve plate 6 and the top wall 52, so as to avoid causing each gas in the second gas buffer chamber 5 The pressure imbalance at the location also makes the direction of the reaction force of the gas in the second gas buffer chamber 5 on the plunger structure 2 be in the direction of the movement of the plunger structure 2 .

In this embodiment, as shown in Fig. 2-Fig. 4, the plunger structure 2 includes a cylindrical plunger body 21 matched with the guide sleeve 1, a second gas buffer chamber 5 adjacent to the plunger body 21, And the first fixed end 22 adjacent to the second gas buffer chamber 5 . The second gas buffer chamber 5 is surrounded by a top wall 52 , a bottom wall 53 and a peripheral wall 54 . That is, the second gas buffer chamber 5 is located between the plunger body 21 and the fixed end 22, so that the second gas buffer chamber 5 is in the direction of movement of the plunger body 21, which is beneficial to the force direction of the second gas buffer chamber 5. stability. The left end of the guide sleeve 1 is provided with a second fixed end 11. In this embodiment, the first fixed end 22 is hinged on the washing machine cabinet, and the second fixed end 11 is hinged on the outer cylinder.

The bottom wall 53 of the second gas buffer chamber 5 is symmetrically provided with at least two pressure relief holes 5 with respect to the axis of the plunger structure 2, so as to avoid the pressure in the second gas buffer chamber 5 when the pressure relief holes 5 release pressure as much as possible. The turbulence of the gas flow makes the pressure in the second gas buffer chamber 5 unbalanced.

In other embodiments, a pressure relief valve may also be provided on the pressure relief hole 51 for controlling the minimum pressure in the second gas buffer chamber 5 .

Referring to Fig. 5 and Fig. 6, it is the second embodiment of the shock absorber for the washing machine proposed by the present invention. The main difference between this implementation and the first embodiment is that the part of the second gas buffer chamber is set differently, Other structures can adopt the same structure as that of the first embodiment.

In this embodiment, the shock absorber includes a guide sleeve 1 and a plunger structure 2, and one end of the plunger structure 2 is inserted into the guide sleeve 1; in this way, the guide sleeve 1 and the plunger structure 2 surround and form a first gas buffer chamber 4. When the plunger structure 2 moves in the guide sleeve 1 , the plunger structure 2 compresses the gas in the first gas buffer chamber 4 . The shock absorber is also provided with a second gas buffer chamber 5, wherein the second gas buffer chamber 5 communicates with the first gas buffer chamber 4, and is provided between the first gas buffer chamber 4 and the second gas buffer chamber 5 The one-way valve plate 6, the one-way valve plate 6 can only be opened toward the direction of the second gas buffer chamber 5 . That is to say, when the plunger structure 2 compresses the gas in the first gas buffer chamber 4 so that the gas pressure in the first gas buffer chamber 4 is sufficiently high, the one-way valve plate 6 is pushed open so that the gas in the first gas buffer chamber 4 Part of the gas enters the second gas buffer chamber 5.

During the washing process of the washing machine, especially during dehydration, the vibration of the outer cylinder is relatively large, that is, the vibration force received by the shock absorber is relatively large, and the vibration force is transmitted to the shock absorber, so that the plunger structure 2 is in the direction of the guide sleeve. The speed of reciprocating movement in 1 is relatively high, and the plunger structure 2 compresses the gas in the first gas buffer chamber 4, that is, when the plunger structure 2 moves to the right in the figure, the gas pressure in the first gas buffer chamber 4 is enough to push Open the one-way valve plate 6, at this time, part of the gas in the first gas buffer chamber 4 enters the second gas buffer chamber 5, and the gas pressure in the first gas buffer chamber 4 decreases, so that the plunger structure 2 can continue to compress and move, The energy of the vibration is further consumed, the buffer function of the shock absorber is increased, and the vibration of the washing machine is reduced; and part of the gas in the first gas buffer chamber 4 enters the second gas buffer chamber 5, so that the gas in the second gas buffer chamber 5 The pressure increases, so the high-pressure gas in the second gas buffer chamber 5 has a certain reaction force on the plunger structure 2, that is, the force in the left direction in the figure, which offsets the force in the compression direction received by part of the plunger structure 2. It is beneficial to slow down the movement range of the plunger structure 2; and when the plunger structure 2 resets and moves, the one-way valve plate 6 is closed, so that the reaction force of the high-pressure gas in the second gas buffer chamber 5 to the plunger structure 2 disappears, avoiding the reaction The force pushes the plunger structure 2 into the reset movement 3 to further achieve the shock-absorbing effect. In this way, by arranging two gas buffer chambers and a valve plate structure, more vibration energy can be consumed to achieve the effect of shock absorption and noise reduction.

Referring to FIG. 5 , a valve spring 8 is arranged in the second gas buffer chamber 5 , and the valve spring 8 exerts a force in the closing direction on the one-way valve 6 . The one-way valve plate 6 is automatically reset under the push of the valve plate spring 8 by setting the valve plate spring 8 . When the gas pressure in the first gas buffer chamber 4 reaches the sum of the gas pressure in the second gas buffer chamber 5 and the pulling force of the valve spring 8 on the one-way valve 6 , the one-way valve 6 will be pushed open. The valve plate spring 8 is a cylindrical spring.

In this embodiment, referring to Fig. 5, the valve plate spring 8 is conical, the bottom of the conical shape is in contact with the bottom of the second gas buffer chamber 5, and the top of the conical shape is in contact with the one-way valve plate 6, so that the second The stressed area at the bottom of the gas buffer chamber 5 is larger, preferably the bottom of the valve spring 8 has the same area as the bottom of the second gas buffer chamber 5, which is conducive to the stability of the valve spring 8 in the second gas buffer chamber 5, and Increase the stability of the elastic force provided by the valve plate spring 8 to the one-way valve plate 6 .

In order to ensure the direction of opening and closing of the one-way valve plate 6, a guide structure is provided between the one-way valve plate 6 and the second gas buffer chamber 5, and the one-way valve plate 6 moves along the guide structure when opening and closing, ensuring This ensures the overall leftward or backward movement of the one-way valve plate 6 when it moves, and ensures the airtightness between the one-way valve plate 6 and the second gas buffer chamber 5 after it is closed.

In this embodiment, as shown in FIG. 6, the guide structure is a guide groove 61 provided on the one-way valve plate 6, and a guide column 55 correspondingly provided on the second gas buffer chamber 5, and the guide column 55 passes through the guide groove. 61. The one-way valve plate 6 is circular, and more than two guide grooves 61 are arranged on the one-way valve plate 6, and the guide grooves 61 are evenly distributed on the same circle where the center of the one-way valve plate 6 is circular.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention to other forms. Any skilled person who is familiar with this profession may use the technical content disclosed above to change or remodel it into an equivalent change. Example. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims (10)

1. a kind of damper for washing machine, including pilot sleeve and piston structure, one end of the piston structure is inserted in the pilot sleeve, it is characterized in that, the pilot sleeve and piston structure surround and form first gas surge chamber, the damper also includes the second gas surge chamber being connected with the first gas surge chamber, provided with the check valve sheet that can be opened to second gas surge chamber direction between the first gas surge chamber and second gas surge chamber.

2. damper according to claim 1, it is characterized in that, when the shaking force that the damper is subject to is larger, the piston structure moves back and forth speed increase in the pilot sleeve, so that the gas pressure increase in the first gas surge chamber, it is enough to push the check valve sheet open so that the portion gas in the first gas surge chamber enters in the second gas surge chamber, and the reaction force that the piston structure is also given by the gas in the second gas surge chamber.

3. damper according to claim 1, it is characterised in that the damper also includes damping spring, one end of the damping spring is located on the pilot sleeve, and the other end is located on the piston structure.

4. damper according to claim 1, it is characterised in that valve block spring is provided with the second gas surge chamber, the valve block spring applies the power of closing direction to the check valve sheet.

5. the damper according to any one of Claims 1-4, it is characterised in that provided with the guide frame that the check valve sheet is moved that is used for being mutually matched between check valve sheet and the second gas surge chamber.

6. damper according to claim 5, it is characterized in that, the guide frame is the lead being located on one of the check valve sheet and second gas surge chamber and is located at the check valve sheet and second gas surge chamber another upper guide groove matched with the lead, and the lead is in guide groove.

7. the damper according to any one of Claims 1-4, it is characterized in that, the second gas surge chamber has the first roof abutted with the gas buffer room and the bottom wall being be arranged in parallel with the roof and the perisporium for being tightly connected the roof and bottom wall, the through hole being connected with first gas surge chamber, the check valve sheet sealing through hole to be opened/closed are offered on the roof.

8. the damper according to any one of Claims 1-4, it is characterised in that the second gas surge chamber is provided with the relief hole being connected with the external world.

9. the damper according to any one of Claims 1-4, characterized in that, the piston structure includes the plunger body of the tubular coordinated with the pilot sleeve, the first fixing end abutted with the adjacent second gas surge chamber of the plunger body and with the second gas surge chamber.

10. a kind of washing machine, it is characterised in that any one of claim 1 to 9 including casing, the outer barrel being arranged in casing and the connection casing and outer barrel damper.