CN108866944B - Vibration-absorbing device for washing machine and drum washing machine - Google Patents

Abstract

The invention discloses a vibration damping and vibration absorbing device for a washing machine. By arranging an elastic damping block between a balance block and an outer tub, during the dehydration process, when the outer tub vibrates, the elastic damping block is compressed or reset by force, and the balance block is relatively opposite to the outer tub. Move, change the rigid connection into a flexible connection, and the balance block-vibration damping rubber system acts as a dynamic vibration absorber, effectively absorbing the vibration of the barrel system. In addition, due to the damping characteristics of the vibration-absorbing rubber, some energy will be consumed by compressing the rubber during the vibration of the balance weight, which can further reduce the vibration of the barrel system.

Description

Vibration-absorbing device for washing machine and drum washing machine

technical field

The invention relates to the technical field of vibration reduction of washing machines, in particular to a vibration reduction and vibration absorption device for washing machines.

Background technique

When the washing machine is working, the outer tub will vibrate and tilt to one side under the force of the motor, clothes and washing water. The outer tub is likely to collide with the box, resulting in increased noise when the washing machine is working, and is prone to collision damage between the box and the outer tub, affecting the service life of various parts of the washing machine.

In order to deal with the vibration of the washing tub, the front-loading washing machine usually sets a washing machine balance block on the outer tub. The main function of the washing machine balance block is to increase the mass and moment of inertia of the internal system, and improve the ability of the bucket system to overcome the eccentric load of the clothes, thereby reducing the system. Vibration to improve customer sensory experience. However, the existing balance weight is directly fixed on the outer barrel by fixing bolts, and the two are rigidly connected, and there is no relative movement. During the dehydration process, the two as a whole vibrate in the same phase, only through the rotational inertia provided by themselves. The vibration of the barrel system is weakened, and the vibration reduction effect is limited.

In order to further reduce vibration and noise, it is usually chosen to attach a vibration absorbing device to the outer tub, such as a drum washing machine disclosed in the prior art (Patent No.: 201210447262.3), by arranging an elastic member and a mass body on the outer tub to form a dynamic vibration absorber to Reduce drum vibration. The device integrates an elastic member and a mass body, which makes the overall device structure complex, increases the cost, can only improve the problem of low-frequency vibration, and has a limited vibration reduction effect, which cannot meet the user's high-end experience.

Therefore, in view of the above problems, it is necessary to propose a new type of counterweight vibration damping and absorbing device, which simplifies the structure and at the same time effectively weakens the vibration of the washing tub to meet the needs of users.

SUMMARY OF THE INVENTION

In view of this, the present invention provides a vibration damping and vibration absorbing device for a washing machine. By arranging an elastic damping block between the balance block and the outer tub, when the outer tub vibrates, the elastic damping block is compressed or reset by force, and the balance block is relatively opposite to the outer tub. Move, change the rigid connection into a flexible connection, effectively reduce the vibration of the laundry tub.

According to the purpose of the present invention, a vibration damping and vibration absorbing device for a washing machine is proposed, including a balance block, the balance block is fixedly arranged on the outer tub of the washing machine, and at least an elastic vibration damping block is arranged between the balance block and the outer tub , the elastic damping block supports the balance block to be set higher than the outer barrel, and there is a gap space between the bottom of the balance block and the outer barrel; when the outer barrel vibrates, the elastic damping block is compressed or reset by force, so The balance weight moves relative to the outer tub within the clearance space.

Preferably, when the outer tub vibrates, the elastic damping block deforms in a direction perpendicular to the outer tub, and the deformation amount of the elastic damping block is smaller than the height of the clearance space.

Preferably, the balance block is fixed on the outer barrel by several bolts, a limit washer is provided on the top of the bolt, elastic damping blocks are provided on the upper and lower sides of the balance block, and the upper elastic damping block is located on the upper and lower sides of the balance block. Between the limit washer and the balance block, the lower elastic vibration-damping block is located between the balance block and the outer barrel, and the limit washer and the outer barrel cooperate with the balance block and the elastic vibration-damping block in the middle. limit.

Preferably, the upper and lower sides of the balance block are concavely formed with grooves for accommodating elastic damping blocks, the elastic damping blocks are placed in the grooves, and at least the height of the lower elastic damping blocks is greater than The depth of the groove, the lower elastic damping block support balance block is set higher than the outer barrel.

Preferably, the height of the upper elastic damping block is greater than the depth of the groove, the upper elastic damping block supporting the limit washer is disposed higher than the upper side of the balance block, and the deformation of the upper elastic damping block is smaller than the limit washer and the balance block gap height between.

Preferably, the elastic damping block is a rubber block.

Preferably, the lower surfaces of the elastic damping block and the balance block are arc structures, and are arranged concentrically with the outer tub.

Preferably, the elastic damping block is a column structure or a cone column structure or a curved structure from top to bottom.

Preferably, the elastic damping block is a solid structure or a hollow structure.

A drum washing machine includes an inner tub, an outer tub, and a vibration-damping and vibration-absorbing device, wherein the vibration-absorbing and vibration-absorbing device is fixedly arranged on the top of the outer tub, and the vibration-absorbing and vibration-absorbing device is vertically fixed on the outer tub by bolts.

Compared with the prior art, the advantages of the vibration-absorbing device for a washing machine disclosed in the present invention are:

By arranging an elastic damping block between the balance block and the outer barrel, during the dehydration process, when the outer barrel vibrates, the elastic damping block is compressed or reset by force, the balance block moves relative to the outer barrel, and the rigid connection becomes a flexible connection. The vibration damping rubber system acts as a dynamic vibration absorber to effectively absorb the vibration of the barrel system. In addition, due to the damping characteristics of the vibration-absorbing rubber, the compression of the rubber during the vibration of the balance weight will consume part of the energy, which can further reduce the vibration of the barrel system.

Description of drawings

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

FIG. 1 is a schematic structural diagram of the drum washing machine disclosed in the present invention.

FIG. 2 is a schematic structural diagram of the vibration reduction and vibration absorption device disclosed in the present invention.

The name of the corresponding part represented by the number or letter in the figure.

1. Outer barrel 2. Balance weight 3. Elastic damping block 4. Bolt 5. Limit washer 6. Groove

Detailed ways

As mentioned in the background section, the balance weight of the existing washing machine is directly fixed on the outer tub by fixing bolts, and the two are rigidly connected without relative motion. During the dehydration process, the two as a whole vibrate in the same phase. The vibration of the barrel system is weakened by the moment of inertia provided by itself, and the vibration reduction effect is limited.

Aiming at the deficiencies in the prior art, the present invention provides a vibration damping and vibration absorbing device for a washing machine. By arranging an elastic damping block between the balance block and the outer tub, when the outer tub vibrates, the elastic damping block is compressed or reset by force, and the balance is balanced. The block moves relative to the outer tub, and the rigid connection becomes a flexible connection, which effectively reduces the vibration of the washing tub.

The technical solutions of the present invention will be clearly and completely described below through specific embodiments. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

Please refer to FIG. 1 and FIG. 2. As shown in the figures, a vibration-absorbing and vibration-absorbing device for a washing machine includes a balance block 2. The balance block 2 is fixed on the outer tub 1 of the washing machine. Between the balance block 2 and the outer tub 1, a Elastic damping block 3, the elastic damping block supports the balance block 2 and is set higher than the outer barrel, so that there is a gap space between the bottom of the balance block 2 and the outer barrel 1; during the dehydration process, when the barrel vibrates, the elastic vibration damping block is stressed Compression or reset has the effect of damping and absorbing vibration.

The balance block 2 is fixed on the outer barrel 1 by a number of bolts 4, the several bolts are evenly distributed on the balance block 2, and an elastic vibration damping block is correspondingly arranged on each bolt to improve the vibration reduction and vibration absorption at each position of the balance block. Effect. In the present invention, four bolts are used as an example. In other embodiments, different numbers of bolts can be correspondingly provided according to different balance blocks, which is not specifically limited.

Further, the top of the bolt 4 is provided with a limit washer 5, the upper and lower sides of the balance block 2 are provided with elastic damping blocks 3, the upper elastic damping block 3 is located between the limit washer 5 and the balance block 2, and the lower elastic The damping block 3 is located between the balance block 2 and the outer barrel 1 , and the limit washer 5 cooperates with the outer barrel 1 to limit the position of the balance block and the elastic damping block in the middle. By arranging elastic damping blocks on both sides of the balance block, the vibration of the barrel system can be effectively reduced. And the elastic damping block is preferably a rubber block, because the rubber block has damping properties, so that the balance block will consume part of the energy during the vibration process, further reducing the vibration of the barrel system. Compared with the traditional technique of attaching a vibration absorbing device to the outer barrel, the present invention utilizes the existing balance block and forms a vibration absorbing device by adding a rubber block, which has a simple structure, low cost, and obvious noise reduction and vibration reduction effect. In addition to using a rubber block as the elastic damping block, a spring or other flexible materials can also be used, which is not specifically limited.

Preferably, when the outer tub vibrates, the elastic damping block deforms in a direction perpendicular to the outer tub, and the deformation amount of the elastic damping block is smaller than the height of the clearance space. Generally, a material with less elasticity is preferred when selecting the elastic damping block, so as to avoid the collision between the balance block and the outer tub due to excessive elastic deformation.

The upper and lower sides of the balance block 2 are concavely formed with grooves 6 for accommodating elastic damping blocks. The elastic damping blocks 3 are placed in the grooves 6 to be fixed. It is preferable that the elastic damping blocks match the size of the grooves to ensure elasticity. The vibration damping block can only move up and down in the direction of the vertical outer barrel to avoid horizontal shaking. The height of the upper and lower elastic damping blocks is required to be greater than the depth of the groove. The lower elastic damping block supports the balance block and is set higher than the outer barrel. The upper elastic damping block supports the limit washer and is set higher than the upper side of the balance block. The deformation amount of the vibration damping block is smaller than the height of the gap between the limit washer and the balance block, so as to avoid mutual collision between the limit washer, the balance block and the outer barrel.

The lower surfaces of the elastic damping block and the balance block are arc-shaped structures, and are arranged concentrically with the outer barrel, so that the elastic damping block, the balance block and the outer barrel are matched with each other to ensure the structural stability of the barrel system. In order to avoid the interference with the external components of the outer tub, the corresponding positions of the balance block and other components can be provided with a way-out groove correspondingly. Alternatively, a platform for placing the balance block can be formed on the outer barrel. The lower surface of the balance block is flat and directly fixed on the platform.

The elastic vibration damping block 3 is a column-shaped structure. By setting the elastic vibration damping block into a column type, the axial structural strength of the elastic vibration damping block can be effectively improved, so as to realize effective support for the balance block.

In this embodiment, in order to facilitate the installation of the elastic vibration damping block and the groove, and at the same time increase the structural stability of the elastic vibration damping block, the elastic vibration damping block of the cone-column structure is preferably used, and the two elastic vibration damping blocks on the upper and lower sides of the balance block are symmetrical set up. In other embodiments, the elastic vibration damping block may also be in the form of a curved structure from top to bottom or others, which are specifically determined according to the needs of use, and are not limited herein.

The invention also discloses a drum washing machine, comprising an inner tub, an outer tub and a vibration damping and vibration absorbing device.

Example 2

The rest is the same as the embodiment 1, the difference is that only the elastic damping block is arranged between the balance block and the outer barrel to reduce the vibration of the barrel system.

Example 3

The rest is the same as Example 1, the difference is that the size of the limit washer is smaller than the size of the groove, therefore, there is no contact collision problem between the limit washer and the balance weight, so the elastic reduction on the upper side of the design When installing the vibration block, it is not necessary to consider setting the upper elastic vibration damping block higher than the groove setting. By placing the upper elastic vibration damping block completely in the groove, the vibration damping of the upper and lower sides of the balance block is ensured, and the use of materials is reduced, the cost is reduced, and the internal space of the washing machine box is reduced.

The invention discloses a vibration damping and vibration absorbing device for a washing machine. By arranging an elastic damping block between the balance block and the outer tub, during the dehydration process, when the outer tub vibrates, the elastic damping block is compressed or reset by force, and the balance block is relatively opposite to the outer tub. Move, change the rigid connection into a flexible connection, and the balance block-vibration damping rubber system acts as a dynamic vibration absorber, effectively absorbing the vibration of the barrel system. In addition, due to the damping characteristics of the vibration-absorbing rubber, the compression of the rubber during the vibration of the balance weight will consume part of the energy, which can further reduce the vibration of the barrel system.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A vibration-damping and vibration-absorbing device of a washing machine comprises a balance block, wherein the balance block is fixedly arranged on an outer barrel of the washing machine, and is characterized in that an elastic vibration-damping block is arranged between at least the balance block and the outer barrel, the elastic vibration-damping block supports the balance block to be higher than the outer barrel, and a gap space is formed between the bottom of the balance block and the outer barrel; when the outer barrel vibrates, the elastic vibration reduction block is stressed to compress or reset and deforms along the direction vertical to the outer barrel, the deformation of the elastic vibration reduction block is smaller than the height of the gap space, and the balance block moves towards the outer barrel in the gap space;

the balance block is fixedly arranged on the outer barrel through a plurality of bolts, a limiting gasket is arranged at the top of each bolt, elastic vibration reduction blocks are arranged on the upper side and the lower side of each balance block, the upper elastic vibration reduction block is located between the limiting gasket and the balance block, the lower elastic vibration reduction block is located between the balance block and the outer barrel, and the limiting gasket is matched with the outer barrel to limit the balance block and the elastic vibration reduction blocks in the middle.

2. The vibration-reducing and vibration-absorbing apparatus for washing machine as claimed in claim 1, wherein the balance weight has a recess formed therein on both upper and lower sides thereof for receiving the elastic vibration-reducing block, the elastic vibration-reducing block is disposed in the recess, at least the lower elastic vibration-reducing block has a height greater than the depth of the recess, and the lower elastic vibration-reducing block supports the balance weight higher than the outer tub.

3. The vibration-reducing and-absorbing apparatus for washing machines as claimed in claim 2, wherein the height of the upper elastic vibration-reducing block is greater than the depth of the recess, the upper elastic vibration-reducing block supports the limiting washer above the balance weight, and the upper elastic vibration-reducing block deforms by an amount less than the height of the gap between the limiting washer and the balance weight.

4. The vibration-damping and vibration-absorbing apparatus for washing machine as claimed in claim 1, wherein said elastic vibration-damping block is a rubber block.

5. The vibration-reducing and vibration-absorbing apparatus for washing machine as claimed in claim 1, wherein the lower surfaces of the elastic vibration-reducing block and the balance weight are of an arc-shaped configuration and are disposed concentrically with the outer tub.

6. The vibration-reducing and absorbing apparatus for washing machine as claimed in claim 1, wherein said elastic vibration-reducing block is a cylindrical structure or a tapered cylindrical structure or a curved structure from top to bottom.

7. The vibration reducing and absorbing apparatus for washing machine as claimed in claim 1, wherein said elastic vibration reducing block is of solid or hollow structure.

8. A drum washing machine comprising an inner tub, an outer tub and the vibration damping and absorbing device of any one of claims 1 to 7, wherein the vibration damping and absorbing device is fixedly installed at the top of the outer tub, and the vibration damping and absorbing device is vertically fixed to the outer tub by means of bolts.

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