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

Shock absorber, washing machine and clothes dryer Download PDF

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Publication number
CN105986407B
CN105986407B CN201510047105.7A CN201510047105A CN105986407B CN 105986407 B CN105986407 B CN 105986407B CN 201510047105 A CN201510047105 A CN 201510047105A CN 105986407 B CN105986407 B CN 105986407B
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China
Prior art keywords
sleeve
plunger
friction
shock absorber
washing machine
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CN105986407A (en
Inventor
许升
赵志强
吕艳芬
彭秀文
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Qingdao Haier Washing Machine Co Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Washing Machine Co Ltd
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  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)

Abstract

The invention relates to the field of household appliances, in particular to a washing machine and a shock absorber thereof. The shock absorber comprises a sleeve with an opening at one end and a first plunger, one end of the first plunger is a fixed end, the other end of the first plunger is inserted into the sleeve from the opening of the sleeve and can slide along the sleeve, and a friction plate in friction fit with the first plunger is arranged between the first plunger and the sleeve; the sleeve is provided with an elastic piece and a second friction sliding device which is connected with the elastic piece and can slide relative to the sleeve in a friction mode, and when the first plunger moves relative to the sleeve and exceeds a preset position, the first plunger is abutted to the second friction sliding device and compresses the elastic piece. The structure can ensure that the shock absorber has better shock absorption performance and longer service life, and reduces the risk of failure of the shock absorption performance caused by the situation that the friction is larger.

Description

Shock absorber, washing machine and 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
From the whole washing process of the washing machine, vibration is generated in each stage of washing, rinsing and dewatering. The rotating speed of the inner drum of the washing machine is from 0 to 1460r/min, namely the rotating frequency is changed at 0-25Hz, in the rotating process of the inner drum, because clothes are washed and unevenly distributed, forces in two vibration systems are formed, and one is off-load to cause the outer drum to move downwards; centrifugal force causes the outer barrel to rock left and right.
In order to solve the above problems, a damper is provided between the casing and the outer tub of the washing machine in the prior art, and the damper can absorb and eliminate vibration, prevent creeping, reduce noise, and is an important device for ensuring the performance of the washing machine and prolonging the service life of the washing machine. One end of the general shock absorber is fixed on the box body, and the other end is fixed on the outer cylinder. The vibration damper can effectively inhibit the vibration generated by the washing machine, thereby improving the vibration of the washing machine box body and the noise level of the whole machine. However, the vibration damper of the existing washing machine mainly depends on the friction force, and buffers and consumes the vibration energy of the washing machine during washing and dehydration.
In practical application, the outer cylinder of the washing machine is suspended by the spring, once vibration is generated, the outer cylinder rebounds under the spring force, and at the moment, the shock absorber plays a damping role on the rebounding of the spring, namely, the outer cylinder tends to be stable after rebounding.
Patent application No. 201310121596.6 discloses a damper for a washing machine with variable damping force, which comprises a sleeve 01 with an opening at one end, a plunger 02 and at least one friction plate 03, wherein one end of the plunger 02 is inserted into the sleeve 01 from the opening of the sleeve 01, and the friction plate 03 is tightly attached to the inner wall of the sleeve 01 and contacts with the outer wall of the plunger 02, as shown in fig. 1. The other end of the sleeve 01 is a fixed end 011, and the sleeve 01 is fixed on the inner side of the washing machine box body 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 a damping force by a frictional movement with respect to the inner wall of the sleeve 01, thereby achieving a shock-absorbing effect of the washing machine. In the shock absorber, the radius of one section of the top of the plunger 02 is smaller than that of the rest section of the plunger 02. The shock absorber is not only suitable for large-amplitude working conditions of washing, rinsing, low-speed dehydration and the like of the washing machine, but also suitable for small-amplitude working conditions of high-speed dehydration and the like, and can generate effective inhibiting effect on the vibration generated by the washing machine, so that the vibration of the box shell of the washing machine and the noise level of the whole machine are improved.
However, the shock absorber described above has the following problems: the shock absorption effect of the shock absorber is not good, the friction plate of the shock absorber is easy to age, and the damping of the shock absorber fails after the friction plate ages. When the aging damping of the friction plate of the shock absorber disappears or is seriously reduced, the washing machine vibrates greatly when washing clothes, and can hit a drum frequently at the beginning when dewatering, and when the washing machine is not balanced, the washing machine can not start a high-speed dewatering program, only can frequently balance the balance, sometimes needs to balance dozens of times for the balance leveling to perform the dewatering program, and can not dewater seriously, thereby seriously influencing the washing and dewatering performances of the washing machine.
Based on the above description, there is a need for a new damping device to solve the problems of poor damping effect and easy aging of the prior art damper.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a shock absorber, which can effectively reduce the possibility of damping failure of a friction plate, and can achieve a better shock absorbing effect and higher reliability.
The invention also aims to provide a washing machine, which is provided with the damper, and the damper improves the performance of the washing machine.
The present invention is also directed to a dryer having the above-mentioned damper, which improves the performance of the dryer.
The embodiment of the invention adopts the following technical scheme:
a shock absorber comprises a sleeve with an opening at one end and a first plunger, wherein one end of the first plunger is a fixed end, the other end of the first plunger is inserted into the sleeve from the opening of the sleeve and can slide along the sleeve, and a friction plate in friction fit with the first plunger is arranged between the first plunger and the sleeve; the sleeve is provided with an elastic piece and a second friction sliding device which is connected with the elastic piece and can slide relative to the sleeve in a friction mode, and when the first plunger moves relative to the sleeve and exceeds a preset position, the first plunger is abutted to the second friction sliding device and compresses the elastic piece.
Preferably, a frictional damping between the second friction sliding device and the sleeve is equal to or greater than a frictional damping between the friction plate and the first plunger.
Preferably, the elastic member and the second friction sliding device are both disposed inside the sleeve, and the second friction sliding device is a second plunger.
Preferably, a limiting boss is arranged in the sleeve and used for limiting the position of the second plunger.
Preferably, the sleeve is divided into a first partial sleeve and a second partial sleeve, the second plunger is located in the second partial sleeve, and the inner diameter of the first partial sleeve is smaller than that of the second partial sleeve.
Preferably, the elastic element and the second friction sliding device are sleeved outside the sleeve, and the second friction sliding device is a friction ring; the shock absorber further comprises a first friction sliding device, the first friction sliding device further comprises an outer sleeve surrounding the periphery of the first plunger, the outer sleeve is located on the outer side of the sleeve, and the first plunger is in contact with the friction ring when sliding inwards along the inner wall of the sleeve.
Preferably, the second friction sliding device is made of a metal material, an elastomer, a sticky body or a plastic material; the first plunger is made of metal materials.
A washing machine or dryer comprises at least one damper, wherein the damper is located between a box body and an outer cylinder of the washing machine, and two ends of the damper are respectively connected with the box body and the outer cylinder. ,
preferably, the damper is connected to the outer cylinder through a fixed end of the sleeve, and is connected to the case through a fixed end of the first plunger.
The technical scheme provided by the embodiment of the invention has the beneficial technical effects that:
(1) the shock absorber comprises a sleeve with an opening at one end and a first friction sliding device, wherein the first friction sliding device comprises a first plunger, one end of the first plunger is inserted into the sleeve from the opening of the sleeve and can slide along the sleeve, and a friction plate in friction fit with the first plunger is arranged between the first plunger and the inner wall of the sleeve; and the sleeve is provided with an elastic part and a second friction sliding device which is connected with the elastic part and can slide relative to the sleeve in a friction way, and when the first plunger moves relative to the sleeve to exceed a preset position, the first plunger is abutted against the second friction sliding device and compresses the elastic part. The structure can make the shock absorber have better shock absorbing performance and longer service life, and reduce the risk of failure of the shock absorbing performance caused by the condition that the friction is larger.
(2) Due to the different inner diameters of the first partial sleeve and the second partial sleeve, a limiting device is formed at the joint of the first partial sleeve and the second partial sleeve. Stop device can make the elastic component pre-compaction for the elastic component can store bigger vibration energy, and stop device can effectively reduce the spring-back force of spring to the plunger, and vibration energy is stored to better consumption spring.
(3) Because certain clearance has between outside sleeve and the sleeve outer wall, this clearance can reduce the friction between outside sleeve and the sleeve outer wall, has reduced the risk that outside sleeve and sleeve outer wall were worn and torn, has improved the wearability of bumper shock absorber.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic view of a prior art shock absorber;
FIG. 2 is a schematic structural diagram of a shock absorber according to a first embodiment of the present application;
FIG. 3 is a schematic view of a preferred construction of a shock absorber according to one embodiment of the present application;
fig. 4 is a schematic structural diagram of a shock absorber according to a second embodiment of the present application.
In the figure:
01. a sleeve; 02. a plunger; 03. a friction plate;
011. a fixed end; 021. a fixed end;
11. a sleeve; 12. an elastic member; 13. a second plunger; 15. a first friction sliding device; 16. a friction plate;
111. a fixed end;
151. a first plunger; 152. a fixed end;
21. a sleeve; 22. an elastic member; 23. a friction ring; 25. a first friction sliding device; 26. a friction plate;
211. a fixed end;
251. a first plunger; 252. a fixed end; 253. an outer sleeve.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The scheme provides a shock absorber and a washing machine or a clothes dryer with the shock absorber, the shock absorber can be applied to a pulsator washing machine and a roller washing machine, and can also be applied to the clothes dryer.
Example one
The drum washing machine provided by the scheme comprises at least one shock absorber, wherein the shock absorber is positioned between a box body and an outer barrel of the washing machine, and two ends of the shock absorber are respectively connected with the box body and the outer barrel. ,
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, the other end is a fixed end 111, and the fixed end 111 of the sleeve 11 is connected with the outer cylinder 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, the first plunger 151 is connected to the casing of the washing machine through the fixed end 152, and 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 in friction fit with the first plunger 151 is arranged between the first plunger 151 and the sleeve 11. The first plunger 151 generates a damping force when sliding in and out with respect to the friction plate 16.
The shock absorber of above structure will lead to failing under the excessive friction of big vibrations, in order to make the damping performance of shock absorber better, and the life-span is longer, and then sets up the shock absorber into following structure.
The sleeve 11 is provided with an elastic member 12 and a second friction sliding device which is connected with the elastic member 12 and can slide relative to the sleeve 11 in a friction manner, and when the first plunger 151 moves relative to the sleeve 11 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 element 12, one end of the elastic element 12 is fixed at the bottom of the sleeve 11, and one end of the elastic element 12 close to the opening is connected with a second friction sliding device capable of sliding in friction relative to the sleeve 11.
Said second friction sliding means is preferably a second plunger 13. The second plunger 13 is a free-running friction ring. The second plunger 13 may generate a damping force with an inner wall of the sleeve 11 when sliding inside the sleeve 11.
In this embodiment, the friction plate 16 is preferably located on the inner wall of the sleeve 11 near the opening. The friction plate 16 may be an annular structure, the annular friction plate 16 is tightly attached to the inner wall of the sleeve 11, or a plurality of friction plates 16 may be uniformly arranged on the inner wall of the sleeve 11. The length of the friction plate 16 is not limited, and is set according to actual conditions.
The shock absorber described above is damped by only the frictional force between the first plunger 151 and the friction plate 16 and the frictional force between the second plunger 13 and the inner wall of the sleeve 11 at a small amplitude.
At large amplitudes, there are the following situations:
1. the outer cylinder moves with a large amplitude for a plurality of times, the first plunger 151 can contact the second plunger 13, and after contacting the second plunger 13, the two move reciprocally together in the sleeve 11 to rub, and the increased friction force against the second plunger 13 acts as a damping force. When the first plunger 151 and the second plunger 13 move leftward, the elastic member 12 functions only to deform and store the vibration energy, and when the first plunger 151 and the second plunger 13 move rightward, the elastic member 12 functions only to restore the deformation and push the first plunger 151 and the second plunger 13 to move rightward together.
2. The first plunger 151 can contact the second plunger 13 by single or discontinuous large amplitude movement of the outer cylinder, and after contacting the second plunger 13, the two move together leftwards in the sleeve 11 for friction, and the increased friction force against the second plunger 13 and the deformation energy storage of the elastic member 12 play a role in damping. When the first plunger 151 moves to the left, the second plunger 13 is separated from the first plunger 151, the vibration of the outer barrel is small, the next movement amount of the first plunger 151 is small, the first plunger 151 cannot contact with the second plunger 13 any more, and at the moment, the second plunger 13 stops moving after the elastic piece 12 consumes the friction energy of the second plunger 13. The storing of the vibration energy against the deformation of the elastic member 12 is dissipated by the second plunger 13.
The left-right movement in the above description is for illustrative purposes only, and it is clear that the dampers are spatially arranged and that the direction of movement is also determined by the implementation of the dampers.
The shock absorber that this scheme provided not only is applicable to washing machine at big amplitude operating modes such as washing, rinsing, low-speed dehydration, is applicable to again, and little amplitude operating mode during high-speed dehydration, and then realizes better vibration/noise reduction.
In this embodiment, the materials of the second plunger 13 and the first plunger 151 need to be matched, and the materials with low contact noise are selected. For example, the second friction sliding device is made of metal material, elastomer, sticky body or plastic material; the first plunger 151 is made of a metal material. In this embodiment, the frictional damping between the second friction sliding device and the sleeve 11 is greater than or equal to the frictional damping between the friction plate 16 and the first plunger 151.
Example two:
the difference from the first embodiment is that in this embodiment, as shown in fig. 3, the sleeve 11 is divided into a first partial sleeve and a second partial sleeve, the second plunger 13 is located in the second partial sleeve, and the friction plate 16 is located in the first partial sleeve. The first part sleeve and the second part sleeve have different inner diameters, the first part sleeve having an inner diameter d1 and the second part sleeve having an inner diameter d2, the inner diameter of the first part sleeve being smaller than the inner diameter of the second part sleeve. Otherwise, the embodiment is the same as the first embodiment, and is not described herein.
In this embodiment, the elastic member 12 may be deformed, but preferably, the elastic member 12 is deformed in a pre-pressing manner, so as to better absorb the energy stored by the shock.
In this embodiment, a stop is formed at the junction of the first partial sleeve and the second partial sleeve due to the different inner diameters of the first partial sleeve and the second partial sleeve. Stop device can make the prepressing of elastic component 12 for elastic component 12 can store bigger vibration energy, and stop device can effectively reduce the resilience force of spring to the plunger, and vibration energy is stored to better consumption spring.
In this embodiment, as another preferable scheme, a limit boss may be provided in the sleeve 11, and the limit boss is used to limit the position of the second plunger 13.
Of course, the limiting device is not limited to the above two modes, and other structures are also possible.
EXAMPLE III
As shown in fig. 4, like the first embodiment, the sleeve 21 is fixed to the outer tub of the washing machine by the fixing end 211, the first plunger 251 is fixed to the casing of the washing machine by the fixing end 252 of the end, and the friction plate 26 is disposed 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 outside the sleeve 21, and the second friction sliding device is a friction ring 23. The first friction sliding device 25 further includes an outer sleeve 253 provided around the outer periphery of the first plunger 251, and the outer sleeve 253 is located outside the sleeve 21 and contacts the friction ring 23 when the first plunger 251 slides inward along the inner wall of the sleeve 21.
Preferably, a certain gap is formed between the outer sleeve 253 and the outer wall of the sleeve 21, and the gap can reduce friction between the outer sleeve 253 and the outer wall of the sleeve 21, reduce the risk that the outer sleeve 253 and the outer wall of the sleeve 21 are worn, and improve the wear resistance of the shock absorber.
In this embodiment, the fixing manner of the elastic element 22 outside the sleeve 21 is various, such as positioning interference boss, thread engagement, etc.
Otherwise, the embodiment is the same as the first embodiment, and is not described herein.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (9)

1. A shock absorber comprising a sleeve (11, 21) having an opening at one end thereof and a first plunger (151, 251), one end of the first plunger (151, 251) being a fixed end and the other end being inserted into the sleeve (11, 21) from the opening of the sleeve (11, 21) and being slidable along the sleeve (11, 21), a friction plate (16, 26) being provided between the first plunger (151, 251) and the sleeve (11, 21) and frictionally engaging with the first plunger (151, 251); the method is characterized in that: the sleeve (11, 21) is provided with an elastic part (12, 22) and a second friction sliding device which is connected with the elastic part (12, 22) and can slide in a friction mode relative to the sleeve (11, 21), and when the first plunger (151, 251) moves relative to the sleeve (11, 21) beyond a preset position, the first plunger (151, 251) is abutted against the second friction sliding device and compresses the elastic part (12, 22).
2. A shock absorber according to claim 1, wherein the frictional damping between the second friction slide and the sleeve (11, 21) is equal to or greater than the frictional damping of the friction plates (16, 26) and the first plunger (151, 251).
3. A damper according to claim 1, characterized in that the elastic element (12) and the second friction sliding means, which are the second plungers (13), are both arranged inside the sleeve (11).
4. A damper according to claim 3 in which the sleeve (11) is provided with a stop boss to limit the position of the second plunger (13).
5. A damper according to claim 3, characterised in that the sleeve (11) is divided into a first part sleeve and a second part sleeve, the second plunger (13) being located within the second part sleeve, the first part sleeve having a smaller inner diameter than the second part sleeve.
6. The shock absorber according to claim 1, wherein said elastic element (22) and second friction sliding means are fitted on the outside of said sleeve (21), said second friction sliding means being a friction ring (23);
the shock absorber further includes an outer sleeve (253) provided around an outer periphery of the first plunger (251), the outer sleeve (253) being located outside the sleeve (21) and contacting the friction ring (23) when the first plunger (251) slides inward along an inner wall of the sleeve (21).
7. The damper according to claim 1, wherein said second friction sliding means is made of a metallic material, an elastomer, a viscous body or a plastic material; the first plunger (151, 251) is made of metal material.
8. A washing machine or dryer, characterized in that it comprises at least one damper according to any one of claims 1 to 7, between the cabinet and the tub of the washing machine, the two ends of the damper being connected to the cabinet and the tub, respectively.
9. The washing machine or dryer according to claim 8, wherein the damper is connected to the outer tub through a fixed end of the sleeve (11, 21) and is connected to the cabinet through a fixed end of the first plunger (151, 251).
CN201510047105.7A 2015-01-29 2015-01-29 Shock absorber, washing machine and clothes dryer Active CN105986407B (en)

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