CN105986407B - Shock absorber, washing machine and clothes dryer - Google Patents

Abstract

The invention relates to the field of household appliances, in particular to a shock absorber for a washing machine and a washing machine. The shock absorber includes a sleeve with one end open and a first plunger, one end of the first plunger is a fixed end, and the other end is inserted into the sleeve from the opening of the sleeve, and can be inserted along the sleeve. The sleeve slides, and a friction plate that frictionally fits with the first plunger is arranged between the first plunger and the sleeve; the sleeve is provided with an elastic piece and is connected with the elastic piece and A second friction sliding device that can frictionally slide relative to the sleeve, and when the first plunger moves relative to the sleeve beyond a predetermined position, the first plunger abuts the second friction sliding device and compress the elastic member. The structure can make the shock absorber have better shock absorption performance and longer life, and reduce the risk of the shock absorption performance failure caused by the relatively large friction.

Description

A shock absorber and a washing machine and a clothes dryer

technical field

The invention relates to the field of household appliances, in particular to a shock absorber, a washing machine and a clothes dryer.

Background technique

From the perspective of the entire laundry process of the washing machine, vibrations are generated in all stages of washing, rinsing, and dehydration. The rotation speed of the inner drum of the washing machine varies from 0 to 1460r/min, that is, the rotation frequency varies from 0 to 25 Hz. During the rotation of the inner drum, due to the uneven distribution of laundry washing, two forces are formed in the vibration system. The cylinder moves down and down; centrifugal force causes the outer cylinder to shake left and right.

In order to solve the above problems, in the prior art, a shock absorber is arranged between the box body and the outer cylinder of the washing machine. The shock absorber can absorb and eliminate vibration, prevent 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. . Generally, one end of the shock absorber is fixed on the box body, and the other end is fixed on the outer cylinder. The shock absorber can effectively suppress the vibration generated by the washing machine, thereby improving the vibration of the washing machine box and the noise level of the whole machine. However, the vibration absorber of the existing washing machine mainly relies on frictional force to buffer and consume the vibration energy during washing and dehydration of the washing machine.

In practice, some washing machine outer cylinders are suspended by springs. Once vibration occurs, the outer cylinder will rebound under the force of the springs. At this time, the shock absorber dampens the rebound of the spring, that is, it tends to be stable after rebounding.

The patent application document with the application number of 201310121596.6 discloses a shock absorber for a washing machine with variable damping force. As shown in FIG. 1 , the shock absorber includes a sleeve 01 with an opening at one end, a plunger 02 and at least one Friction plate 03, one end of the plunger 02 is inserted into the sleeve 01 from the opening of the sleeve 01, the friction plate 03 is closely attached to the inner wall of the sleeve 01 and is in contact with the outer wall of the plunger 02. The other end of the sleeve 01 is a fixed end 011 , and the sleeve 01 is fixed inside the washing machine box through the fixed end 011 . The other end of the plunger 02 is a fixed end 021 , and the plunger 02 is fixed on the outer cylinder through the fixed end 021 . The plunger 02 generates damping force through frictional movement relative to the inner wall of the sleeve 01, so as to achieve the effect of shock absorption to the washing machine. And in the shock absorber, the radius of the top section of the plunger 02 is smaller than the radius of the remaining section of the plunger 02 . The shock absorber is not only suitable for washing, rinsing, low-speed dehydration and other large-amplitude working conditions, but also suitable for small-amplitude working conditions such as high-speed dehydration. The shock absorber can effectively suppress the vibration generated by the washing machine. Thereby improving the vibration of the washing machine casing and the noise level of the whole machine.

However, the shock absorber described above has the following problems: the shock absorption effect of the shock absorber is not good, and the friction plate of the shock absorber is easy to be aged, and the damping of the shock absorber will fail after the friction plate is aged. When the damping of the friction plate of the shock absorber disappears or is seriously reduced, the washing machine will vibrate greatly when washing clothes. During dehydration, the drum will frequently hit the drum at first. Sometimes it takes dozens of times to find a balance before the dehydration program can be performed. In severe cases, dehydration cannot be performed, which seriously affects the washing and dehydration performance of the washing machine.

Based on the above description, there is an urgent need for a new shock absorbing device to solve the problems of poor shock absorbing effect and easy aging of shock absorbers in the prior art.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a shock absorber, which can effectively reduce the possibility of failure of the damping of the friction plate, and can achieve better shock absorption effect and higher reliability.

Another object of the present invention is to provide a washing machine, which has the above-mentioned shock absorber, and the shock absorber improves the performance of the washing machine.

Another object of the present invention is to provide a clothes dryer having the above-mentioned shock absorber, which improves the performance of the clothes dryer.

The embodiment of the present invention adopts the following technical solutions:

A shock absorber, the shock absorber comprises a sleeve with one end open and a first plunger, one end of the first plunger is a fixed end, and the other end is inserted into the sleeve from the opening of the sleeve , and can slide along the sleeve, the first plunger and the sleeve are provided with a friction plate that frictionally cooperates with the first plunger; the sleeve is provided with an elastic member and The elastic member is connected to a second friction sliding device that can frictionally slide relative to the sleeve, and when the first plunger moves relative to the sleeve beyond a predetermined position, the first plunger and the first plunger The two friction sliding devices abut against and compress the elastic member.

Preferably, the friction damping between the second friction sliding device and the sleeve is greater than or equal to the friction damping between the friction plate and the first plunger.

Preferably, both the elastic member and the second friction sliding device are arranged inside the sleeve, and the second friction sliding device is a second plunger.

Preferably, the sleeve is provided with a limiting boss for limiting the position of the second plunger.

Preferably, the sleeve is divided into a first part of the sleeve and a second part of the sleeve, the second plunger is located in the second part of the sleeve, the inner diameter of the first part of the sleeve is smaller than the inner diameter of the second part of the sleeve .

Preferably, both the elastic member and the second friction sliding device are sleeved on the outside of the sleeve, and the second friction sliding device is a friction ring; the shock absorber further includes a first friction sliding device, the first friction sliding device A friction sliding device further includes an outer sleeve disposed around the outer circumference of the first plunger, the outer sleeve is located outside the sleeve, and is connected with the first plunger when the first plunger slides inward along the inner wall of the sleeve. The friction rings are in contact.

Preferably, the second friction sliding device is made of a metal material, an elastic body, a viscous body or a plastic material; the first plunger is made of a metal material.

A washing machine or clothes dryer, comprising at least one shock absorber according to any one of the above, the shock absorber is located between the box body and the outer cylinder of the washing machine, and the two ends of the shock absorber are respectively connected to The box body is connected with the outer cylinder. ,

Preferably, the shock absorber is connected to the outer cylinder through the fixed end of the sleeve, and is connected to the box body through the fixed end of the first plunger.

The beneficial technical effects of the technical solutions proposed in the embodiments of the present invention are:

(1) Since the shock absorber provided by the present application includes a sleeve with an opening at one end and a first friction sliding device, the first friction sliding device includes a first plunger, and one end of the first plunger is inserted into the sleeve from the opening of the sleeve , and can slide along the sleeve, the first plunger and the inner wall of the sleeve are provided with friction plates that frictionally fit with the first plunger; and the sleeve is provided with an elastic member and The elastic member is connected to a second friction sliding device that can frictionally slide relative to the sleeve, and when the first plunger moves relative to the sleeve beyond a predetermined position, the first plunger and the first plunger The two friction sliding devices abut against and compress the elastic member. Therefore, the structure can make the shock absorber have better shock absorption performance and longer service life, and reduce the risk of failure of shock absorption performance caused by relatively large friction.

(2) Since the inner diameters of the first part of the sleeve and the second part of the sleeve are different, a limiting device is formed at the joint of the first part of the sleeve and the second part of the sleeve. The limiting device can preload the elastic piece, so that the elastic piece can store more vibration energy, and the limiting device can effectively reduce the spring's rebound force on the plunger, and better consume the spring's stored vibration energy.

(3) Since there is a certain gap between the outer sleeve and the outer wall of the sleeve, the gap can reduce the friction between the outer sleeve and the outer wall of the sleeve, reduce the risk of the outer sleeve and the outer wall of the sleeve being worn, and improve the Abrasion resistance of shock absorbers.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. , for those of ordinary skill in the art, other drawings can also be obtained according to the contents of the embodiments of the present invention and these drawings without creative efforts.

1 is a schematic structural diagram of a shock absorber provided by the prior art;

2 is a schematic structural diagram of a shock absorber provided by a specific embodiment of the present application;

FIG. 3 is a schematic diagram of a preferred structure of the shock absorber provided by the specific embodiment of the present application;

FIG. 4 is a schematic structural diagram of a shock absorber provided by a second specific embodiment of the present application.

In the picture:

01, sleeve; 02, plunger; 03, friction plate;

011, fixed end; 021, fixed end;

11. Sleeve; 12. Elastic part; 13. Second plunger; 15. First friction sliding device; 16. Friction plate;

111. Fixed end;

151, the first plunger; 152, the fixed end;

21, sleeve; 22, elastic member; 23, friction ring; 25, first friction sliding device; 26, friction plate;

211. Fixed end;

251, the first plunger; 252, the fixed end; 253, the outer sleeve.

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only the present invention. Some examples, but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

This solution provides a shock absorber and a washing machine or clothes dryer with the shock absorber. The shock absorber can be applied to both a pulsator washing machine and a drum washing machine, and of course, it can also be applied to a clothes dryer. , for the convenience of description, this solution only takes a drum washing machine as an example for description.

Example 1

The drum washing machine provided by this solution includes at least one shock absorber, the shock absorber is located between the casing and the outer cylinder of the washing machine, and both ends of the shock absorber are respectively connected to the casing and the outer cylinder. ,

Specifically, as shown in FIG. 2 , the shock absorber mainly includes a damping guide sleeve 11 and a first friction sliding device 15 . One end of the sleeve 11 is provided with an opening, and the other end is a fixed end 111. The fixed end 111 of the sleeve 11 is connected to the outer tub of the washing machine. The first friction sliding device 15 includes a first plunger 151, one end of the first plunger 151 is a fixed end 152, and the first plunger 151 is connected to the box of the washing machine through the fixed end 152. The other end of the first plunger 151 can be inserted into the sleeve 11 from the opening of the sleeve 11 and can slide along the sleeve 11 . A friction plate 16 is provided between the first plunger 151 and the sleeve 11 to frictionally fit with the first plunger 151 . When the first plunger 151 slides in and out relative to the friction plate 16, a damping force is generated.

The shock absorber of the above structure will fail under the excessive friction of large vibration. In order to make the shock absorption performance of the shock absorber better and the service life longer, the shock absorber is set to the following structure.

The sleeve 11 is provided with an elastic member 12 and a second friction sliding device which is connected to the elastic member 12 and can frictionally slide relative to the sleeve 11. When the first plunger 151 is opposite to the sleeve After the barrel 11 moves beyond a predetermined position, the first plunger 151 abuts against the second friction sliding device and compresses the elastic member 12 .

In this embodiment, specifically, the inner side of the sleeve 11 close to the fixed end is provided with an elastic member 12 , one end of the elastic member 12 is fixed on the bottom of the sleeve 11 , and the end of the elastic member 12 close to the opening is connected. There is a second friction sliding device that can frictionally slide relative to the sleeve 11 .

The second friction sliding device is preferably a second plunger 13 . The second plunger 13 is a freely movable friction ring. When the second plunger 13 slides inside the sleeve 11 , a damping force can be generated between the second plunger 13 and the inner wall of the sleeve 11 .

In this embodiment, as a preferred solution, the friction plate 16 is located on the inner wall of the sleeve 11 near the opening. The friction plate 16 can be an annular structure, and the annular friction plate 16 is close to the inner wall of the sleeve 11 , or a plurality of friction plates 16 can be evenly arranged on the inner wall of the sleeve 11 . The length of the friction plate 16 is not limited, and is specifically set according to the actual situation.

The above-mentioned shock absorber only relies on the friction force between the first plunger 151 and the friction plate 16 and the friction force between the second plunger 13 and the inner wall of the sleeve 11 to damp vibration under small amplitude.

Under large amplitude, there are the following situations:

1. The outer cylinder moves with large amplitude for many times, and the first plunger 151 can contact the second plunger 13. After contacting the second plunger 13, the two reciprocate together in the sleeve 11 and rub against the second plunger 13. The increased frictional force of the plunger 13 acts as a damping force. When the first plunger 151 and the second plunger 13 move to the left, the elastic member 12 only serves to deform and store vibration energy. When the first plunger 151 and the second plunger 13 move to the right, the elastic member The function of 12 is to restore the deformation and push the first plunger 151 and the second plunger 13 to move to the right together.

2. When the outer cylinder moves with a single or discontinuous large amplitude, the first plunger 151 can contact the second plunger 13. After contacting the second plunger 13, the two move to the left in the sleeve 11 together to rub , relying on the increased friction force of the second plunger 13 and the deformation of the elastic member 12 to store energy for damping and shock absorption. When the first plunger 151 moves to the left, the second plunger 13 and the first plunger 151 are separated, the vibration of the outer cylinder is small, and the first plunger 151 will move less next time and will not contact the second plunger 13 again. , the second plunger 13 stops moving after the friction consumes the elastic member 12 to store energy. The stored vibration energy is consumed by the second plunger 13 against the deformation of the elastic member 12 .

Wherein, the movement to the left and right in the above description is only for the convenience of illustration. It can be clearly known that the shock absorbers are arranged in space, and the movement direction is also determined by the installation of the shock absorbers.

The shock absorber provided by this solution is not only suitable for washing, rinsing, low-speed dehydration and other large-amplitude working conditions, but also suitable for small-amplitude working conditions during high-speed dehydration, thereby achieving better shock absorption and noise reduction.

In this embodiment, it is required that the materials of the second plunger 13 and the first plunger 151 can be matched, and materials with low contact noise are selected. For example, the second friction sliding device is made of a metal material, an elastic body, a viscous body or a plastic material; the first plunger 151 is made of a metal material. In this embodiment, the friction damping between the second friction sliding device and the sleeve 11 is greater than or equal to the friction damping between the friction plate 16 and the first plunger 151 .

Embodiment 2:

The difference from the first embodiment is that in this embodiment, as shown in FIG. 3 , the sleeve 11 is divided into a first part of the sleeve and a second part of the sleeve, and the second plunger 13 is located in the second part of the sleeve. Inside the barrel, the friction plate 16 is located in the first part of the sleeve. The inner diameter of the first part of the sleeve and the second part of the sleeve are different, the inner diameter of the first part of the sleeve is d1, the inner diameter of the second part of the sleeve is d2, and the inner diameter of the first part of the sleeve is smaller than the inner diameter of the second part of the sleeve. Other than that, this embodiment is the same as the first embodiment, which is not repeated here.

In this embodiment, the elastic member 12 may be deformable, but preferably the elastic member 12 is pre-compressed and deformed, which can better absorb shock and energy storage.

In this embodiment, since the inner diameters of the first part of the sleeve and the second part of the sleeve are different, a limiting device is formed at the joint of the first part of the sleeve and the second part of the sleeve. The limiting device can preload the elastic member 12 so that the elastic member 12 can store more vibration energy, and the limiting device can effectively reduce the spring's rebound force on the plunger, and better consume the spring's stored vibration energy.

In this embodiment, as another preferred solution, a limiting boss may also be provided in the sleeve 11 , and the limiting boss is used to limit the position of the second plunger 13 .

Of course, the limiting device is not limited to the above two manners, and other structures may also be used.

Embodiment 3

As shown in FIG. 4, the same as the first embodiment, the sleeve 21 provided in this embodiment is fixed on the outer tub of the washing machine through the fixed end 211, and the first plunger 251 is fixed on the washing machine box through the fixed end 252 of the end. A friction plate 26 is provided at the opening of the sleeve 21 . However, the difference between this embodiment and the first embodiment is that in this embodiment, the elastic member 22 and the second friction sliding device are both sleeved on the outer side of the sleeve 21 , and the second friction sliding device is a friction sliding device. Ring 23. The first friction sliding device 25 further includes an outer sleeve 253 disposed around the outer circumference of the first plunger 251 , and the outer sleeve 253 is located outside the sleeve 21 and along the first plunger 251 . When the inner wall of the sleeve 21 slides inward, it contacts with the friction ring 23 .

Preferably, there is a certain gap between the outer sleeve 253 and the outer wall of the sleeve 21 , and the gap can reduce the friction between the outer sleeve 253 and the outer wall of the sleeve 21 , and reduce the friction between the outer sleeve 253 and the outer wall of the sleeve 21 . The risk of being worn increases the wear resistance of the shock absorber.

In this embodiment, the elastic member 22 can be fixed in various ways on the outside of the sleeve 21 , such as positioning interference bosses, thread engagement, and the like.

Other than that, this embodiment is the same as the first embodiment, which is not repeated here.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention. The scope is determined by the scope of the appended claims.

Claims (9)

1. A shock absorber comprising a sleeve (11, 21) with one end open and a first plunger (151, 251), one end of the first plunger (151, 251) being fixed The other end is inserted into the sleeve (11, 21) from the opening of the sleeve (11, 21), and can slide along the sleeve (11, 21), the first plunger (151) , 251) and the sleeve (11, 21) are provided with friction plates (16, 26) that frictionally fit with the first plunger (151, 251); it is characterized in that: the sleeve (11) , 21) is provided with an elastic member (12, 22) and a second friction sliding device that is connected to the elastic member (12, 22) and can frictionally slide relative to the sleeve (11, 21), and when the After the first plunger (151, 251) moves relative to the sleeve (11, 21) beyond a predetermined position, the first plunger (151, 251) abuts against the second friction sliding device and compresses the The elastic member (12, 22). 2. The shock absorber according to claim 1, characterized in that the frictional damping between the second friction sliding device and the sleeve (11, 21) is greater than or equal to the friction plate (16, 26) Frictional damping with the first plunger (151, 251). 3. The shock absorber according to claim 1, wherein the elastic member (12) and the second friction sliding device are both arranged inside the sleeve (11), and the second friction sliding device is The second plunger (13). 4. The shock absorber according to claim 3, characterized in that a limiting boss is provided in the sleeve (11) for limiting the position of the second plunger (13). 5. The shock absorber according to claim 3, wherein the sleeve (11) is divided into a first part of the sleeve and a second part of the sleeve, and the second plunger (13) is located in the second part In the sleeve, the inner diameter of the first part of the sleeve is smaller than the inner diameter of the second part of the sleeve. 6. The shock absorber according to claim 1, wherein the elastic member (22) and the second friction sliding device are both sleeved on the outer side of the sleeve (21), and the second friction sliding device is the friction ring (23); The shock absorber further comprises an outer sleeve (253) arranged around the outer circumference of the first plunger (251), the outer sleeve (253) is located outside the sleeve (21), and is located on the outside of the first plunger (251). When a plunger (251) slides inward along the inner wall of the sleeve (21), it contacts with the friction ring (23). 7. The shock absorber according to claim 1, characterized in that, the second friction sliding device is made of metal material, elastomer, viscous body or plastic material; the first plunger (151, 251) is made of metal Material. 8. A washing machine or clothes dryer, comprising at least one shock absorber according to any one of claims 1 to 7, wherein the shock absorber is located between the casing and the outer tub of the washing machine , the two ends of the shock absorber are respectively connected with the box body and the outer cylinder. 9. The washing machine or dryer according to claim 8, characterized in that, the shock absorber is connected to the outer cylinder through the fixed end of the sleeve (11, 21), and is connected to the outer cylinder through the first column The fixed ends of the plugs (151, 251) are connected to the box.

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