阅读说明：本技术 一种变阻尼减震器及装有该减震器的洗衣机及控制方法 (Variable damping shock absorber, washing machine with shock absorber and control method ) 是由 周林 许梁 梁泉 于 2019-01-29 设计创作，主要内容包括：本发明公开了一种变阻尼减震器及装有该减震器的洗衣机及控制方法,所述的减震器包括：减震器外壳,插入减震器外壳内的活动件；所述的减震器外壳内壁设有可径向伸缩的气囊,气囊经输气管和回流管与气泵结构分别相连通,气泵结构随活动件的伸缩移动而自输气管向气囊内吹入气流、气囊内气体达到设定值后自回流管向气泵结构回流,改变气囊的径向伸缩量,以调整气囊与活动件间的摩擦力。本发明的变阻尼减震器优选用于洗衣机,但并不局限于洗衣机,还可以适用于其他需要根据活塞的运动方向不同获得不同阻尼的结构中,如活塞式发动机、空气压缩机、打夯机等往复震动的工作系统。(The invention discloses a variable damping shock absorber, a washing machine with the shock absorber and a control method, wherein the shock absorber comprises: a damper housing, a movable member inserted into the damper housing; the inner wall of the shell of the shock absorber is provided with an air bag which can radially stretch out and draw back, the air bag is respectively communicated with an air pump structure through an air pipe and a return pipe, the air pump structure blows air flow into the air bag from the air pipe along with the stretching and drawing movement of the moving part, and the air flows back to the air pump structure from the return pipe after the air in the air bag reaches a set value, so that the radial stretching amount of the air bag is changed, and the friction force between the air bag and the moving part. The variable damping shock absorber is preferably used for washing machines, but not limited to washing machines, and can also be applied to other structures which need to obtain different damping according to different motion directions of the piston, such as reciprocating vibration working systems of piston engines, air compressors, tamping machines and the like.)

1. A variable damping shock absorber comprising: a damper housing, a movable member inserted into the damper housing;

the method is characterized in that: the inner wall of the shell of the shock absorber is provided with an air bag which can radially stretch out and draw back, the air bag is respectively communicated with an air pump structure through an air pipe and a return pipe, the air pump structure blows air flow into the air bag from the air pipe along with the stretching and drawing movement of the moving part, and the air flows back to the air pump structure from the return pipe after the air in the air bag reaches a set value, so that the radial stretching amount of the air bag is changed, and the friction force between the air bag and the moving part.

2. A variable damping shock absorber according to claim 1, wherein: the air pump structure comprises an air cylinder communicated with the air bag, a telescopic piston is arranged in the air cylinder, and the piston is driven by a piston rod to move in a telescopic mode so as to generate high-pressure air in the air cylinder; the cylinder is communicated with the air bag through a gas pipe, and the gas pipe is provided with a one-way valve to ensure that the flow direction of gas in the gas pipe is only from the cylinder to the air bag, so that high-pressure gas generated in the cylinder flows into the air bag along the gas pipe;

preferably, the air cylinder, the air conveying pipe and the shock absorber shell are integrated.

3. A variable damping shock absorber according to claim 2, wherein: the two ends of the backflow pipe are respectively communicated with the air bag and the air cylinder, and the backflow pipe is provided with a backflow valve so as to automatically open the backflow pipe after the air pressure in the air bag reaches a set value and enable the air in the air bag to flow back to the air cylinder;

preferably, the backflow valve is arranged at the position where the backflow pipe is communicated with the air bag;

preferably, the backflow valve can be any control valve in the prior art, and the air bag is provided with a pressure sensor for detecting the internal pressure of the air bag, so that an opening instruction is sent to the control valve after the internal pressure of the air bag reaches a set value; or the return valve is any overflow valve in the prior art, so that the valve plate is automatically jacked open to open the return pipe after the pressure in the air bag reaches a set value.

4. A variable damping shock absorber according to claim 2 or 3, wherein: the piston rod is connected with the movable piece, so that the piston rod generates telescopic displacement together with the movable piece;

preferably, the piston rod is parallel to the movable piece, so that the telescopic displacement directions of the piston rod and the movable piece are arranged in the same direction.

5. The variable damping shock absorber according to claim 4, wherein: the piston rod is hollow, and the hollow part forms a channel for gas to flow so as to communicate the external atmosphere with the inside of the cylinder; one end of the piston rod, which extends into the cylinder, is fixedly connected with the piston, an opening penetrating through the piston is arranged at the joint, and a one-way valve is arranged at the opening, so that the gas in the internal flow passage of the piston rod can only flow along the direction from the external atmosphere to the cylinder;

preferably, one end of the piston rod communicated with the outside of the atmosphere is connected with one end of the movable piece outside the shock absorber shell.

6. A variable damping shock absorber according to any one of claims 1 to 5, wherein: the air bag is provided with an exhaust port, an exhaust valve is arranged at the exhaust port, and the exhaust valve has two using working conditions to control the on-off of the exhaust port;

preferably, the air bag is provided with an overflow port, and the overflow port is provided with an overflow valve so as to automatically release the air in the air bag after the air pressure in the air bag reaches a set maximum value;

preferably, the set maximum value corresponding to the opening of the overflow valve is greater than the set value corresponding to the opening of the reflux valve;

preferably, a friction plate extending along the telescopic direction of the movable piece is arranged on the inner side of the air bag; the outer side of the air bag is fixedly connected with the inner wall of the shell of the shock absorber;

preferably, one end of the shock absorber shell is closed, the other end of the shock absorber shell is arranged opposite to the opening, and the movable piece is inserted into the shock absorber shell from the opening end and extends along the axial direction of the outer shaft of the shock absorber; and the shock absorber shell close to the sealing end is provided with a vent hole for introducing external atmosphere into the inner cavity, and the vent hole sequentially penetrates through the shock absorber shell and the air bag so as to communicate the external atmosphere with the inner cavity of the shock absorber shell.

7. A washing machine having the variable damping shock absorber as claimed in any one of claims 1 to 6.

8. The washing machine as claimed in claim 7, wherein: the washing machine outer cylinder is connected with the washing machine shell through a plurality of variable damping shock absorbers according to any one of the claims 1 to 6, and air bags of at least two variable damping shock absorbers are communicated through a pipeline;

preferably, the left side and the right side of the opening end of the outer cylinder and/or the bottom end of the outer cylinder are respectively connected with the shell of the washing machine through a variable damping shock absorber, air bags of the variable damping shock absorbers arranged on the left side and the right side of the opening end of the outer cylinder are communicated through a pipeline, and/or air bags of the variable damping shock absorbers arranged on the left side and the right side of the bottom end of the outer cylinder are communicated through a pipeline;

further preferably, the air bags of the variable damping shock absorbers are sequentially communicated in series through pipelines.

9. A control method of the washing machine according to claim 7 or 8, characterized in that: when the inner cylinder is in a low-rotating-speed stage in the dehydration process of the washing machine, controlling an exhaust valve of the damping shock absorber to be in a closed state; controlling the exhaust valve to be in an open state when the inner cylinder rotates to be in a high rotating speed stage;

preferably, when the washing machine is in the dehydration process and the eccentricity detection value of the inner drum is lower than the set value, the exhaust valve is controlled to be in a half-open state.

10. The control method of a washing machine according to claim 9, wherein: when the exhaust valve is in a closed state, when the air pressure in the air bag reaches a set pressure N, the reflux valve is opened, the air in the air bag flows into the air cylinder, and the reflux valve is closed until the air pressure in the air bag is balanced with the air pressure in the air cylinder;

preferably, when the air pressure in the air bag reaches the set pressure N, the check valve arranged on the vent pipe communicated between the air cylinder and the air bag is in a closed state, and the air in the air cylinder can not flow into the air bag any more.

Technical Field

The invention relates to a shock absorber, in particular to a variable damping shock absorber and a washing machine with the shock absorber, and also relates to a control method applied to the washing machine.

Background

The existing drum type washing machine includes a housing forming an external appearance; a washing drum arranged in the casing for storing washing water; a drum rotatably disposed in the washing tub and used for washing and dehydrating laundry; a driving motor disposed at the rear of the washing drum and connected to the rotation shaft of the drum. A door through which laundry is put in or taken out is rotatably provided at a front surface of the casing, and a bracket for supporting a rotation shaft of the drum is provided at a rear of the washing tub. The spring is fixed to the housing at an upper portion of the washing tub, and the damper for damping vibration transmitted from the drum to the washing tub is provided at a lower portion of the washing tub.

As known to those skilled in the art, in the damper of the drum type washing machine, the amplitude of vibration and the source of noise generated at the time of a normal dehydrating operation and at the time of an excessive dehydrating operation under an actual washing operation are very different, and thus are limited in effectively attenuating large and small amplitude vibration. In the damper of the related art drum type washing machine, the damping frictional force is substantially constant at all times, and variation and adjustment of the damping are not achieved.

At present, almost no vibration damping device is available, which can adjust damping force in real time according to the amplitude of the outer cylinder of the washing machine and automatically improve the eccentricity resistance of the machine under the conditions of no external energy supply and no external sensor; however, most of the passive shock absorbers applied in the prior art cannot be widely applied due to insufficient damping force or the limitation of an external air source and the like.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The first purpose of the invention is to provide a variable damping shock absorber to achieve the purpose of providing variable damping shock absorption acting force. In order to realize the purpose of the invention, the following technical scheme is adopted:

a variable damping shock absorber comprising: a damper housing, a movable member inserted into the damper housing; the inner wall of the shell of the shock absorber is provided with an air bag which can radially stretch out and draw back, the air bag is respectively communicated with an air pump structure through an air pipe and a return pipe, the air pump structure blows air flow into the air bag from the air pipe along with the stretching and drawing movement of the moving part, and the air in the air bag flows back to the air pump structure from the return pipe after reaching a set value N, so that the radial stretching amount of the air bag is changed, and the friction force between the air bag and the moving part is adjusted.

Furthermore, the air pump structure comprises an air cylinder communicated with the air bag, a piston capable of moving in a telescopic manner is installed in the air cylinder, and the piston is driven by the piston rod to move in a telescopic manner so as to generate high-pressure air in the air cylinder; the cylinder is communicated with the air bag through the air delivery pipe, and the air delivery pipe is provided with a one-way valve to ensure that the flow direction of the air in the air delivery pipe is only from the cylinder to the air bag, so that the high-pressure air generated in the cylinder flows into the air bag along the air delivery pipe.

Preferably, the air cylinder, the air conveying pipe and the shock absorber shell are integrated.

Furthermore, two ends of a return pipe are respectively communicated with the air bag and the air cylinder, and the return pipe is provided with a return valve so as to automatically open the return pipe after the air pressure in the air bag reaches a set value N and enable the air in the air bag to flow back to the air cylinder.

Preferably, the backflow valve is arranged at the position where the backflow pipe is communicated with the air bag.

Preferably, the backflow valve can be any control valve in the prior art, and the air bag is provided with a pressure sensor for detecting the internal pressure of the air bag, so that an opening instruction is sent to the control valve after the internal pressure of the air bag reaches a set value N; or the return valve is any overflow valve in the prior art, so that the valve plate is automatically jacked open to open the return pipe after the pressure in the air bag reaches a set value N.

Furthermore, the piston rod is connected with the movable piece, so that the piston rod generates telescopic displacement together with the movable piece; preferably, the piston rod is parallel to the movable piece, so that the telescopic displacement directions of the piston rod and the movable piece are arranged in the same direction.

Further, the piston rod is hollow inside, and the hollow part forms a channel for gas to flow so as to communicate the external atmosphere with the inside of the cylinder; one end of the piston rod, which extends into the cylinder, is fixedly connected with the piston, an opening penetrating through the piston is arranged at the joint, and a one-way valve is arranged at the opening, so that the gas in the internal flow passage of the piston rod can only flow along the direction from the external atmosphere to the cylinder; preferably, one end of the piston rod communicated with the outside of the atmosphere is connected with one end of the movable piece outside the shock absorber shell.

Further, the air bag is provided with an exhaust port, an exhaust valve is installed at the exhaust port, and the exhaust valve has two using working conditions to control the on-off of the exhaust port; preferably, the air bag is provided with an overflow port, and the overflow port is provided with an overflow valve so as to automatically release the air in the air bag after the air pressure in the air bag reaches a set maximum value M; preferably, the maximum value corresponding to the opening of the overflow valve is greater than the set value corresponding to the opening of the reflux valve.

Furthermore, a friction plate extending along the telescopic direction of the movable piece is arranged on the inner side of the air bag; the outer side of the air bag is fixedly connected with the inner wall of the shell of the shock absorber.

Furthermore, one end of the shock absorber shell is closed, the other end of the shock absorber shell is arranged opposite to the opening, and the movable piece is inserted into the shock absorber shell from the opening end and extends along the axial direction of the outer shaft of the shock absorber; and the shock absorber shell close to the sealing end is provided with a vent hole for introducing external atmosphere into the inner cavity, and the vent hole sequentially penetrates through the shock absorber shell and the air bag so as to communicate the external atmosphere with the inner cavity of the shock absorber shell.

Drawings

FIG. 1 is a schematic cross-sectional view of a variable damping shock absorber according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view illustrating a variable damping shock absorber according to another embodiment of the present invention;

fig. 3 and 4 are schematic views illustrating the installation of a variable damping shock absorber according to various embodiments of the present invention in a washing machine.

Description of the main elements: 1. a rigid outer wall; 2. an exhaust valve; 3. an elastic inner wall; 4. a friction plate; 5. an overflow valve; 6. A movable member; 7. a one-way valve; 8. a cylinder; 9. a one-way valve plate; 10. a piston rod; 11. a piston; 12. a damper housing; 13. a gas delivery pipe; 14. an air bag; 15. air holes are formed; 16. a reflux valve; 17. a return pipe; 18. a pipeline; 100. an outer cylinder; 200. a housing; 300. and (5) damping variation and shock absorption.

Detailed Description

The present invention will be described in further detail with reference to examples.