Vibration reduction device for washing machine

Abstract

This invention relates to the field of washing machine vibration damping device technology, and proposes a washing machine vibration damping device. A variable tuned mass damping water tank is suspended on the main connecting bracket, and the variable tuned mass damping water tank is provided with a water passage structure, which can achieve the vibration damping effect of the washing machine in a lighter way, reduce transportation costs, improve service life, and at the same time obtain the largest effective volume of the washing inner tub in the frame.

Description

Technical Field

[0001] This invention relates to the field of vibration damping devices for washing machines, and more specifically, to vibration damping devices for washing machines. Background Technology

[0002] Washing machines have become a necessity in people's daily lives. In addition to the washing ratio, the stability of washing machines during the washing and spin-drying process has gradually become one of the factors that consumers consider.

[0003] To achieve better vibration damping, some washing machines add counterweights made of cement, iron, or concrete inside the machine body. By using a certain amount of gravity, they reduce the vibration generated during rinsing and spin-drying. However, this method of vibration damping makes the washing machine difficult to move, increases transportation costs, and wastes resources.

[0004] Currently, some washing machine vibration reduction methods rely on vibration damping blocks installed on the outer drum, springs suspended above the outer drum, and dampers supported below the outer drum. However, vibration damping blocks, in order to achieve the best possible vibration reduction effect, also increase the weight of the machine. Furthermore, the vibration reduction technology combining suspension springs and vibration damping cylinders cannot yet achieve optimal vibration reduction results.

[0005] Therefore, existing vibration reduction technologies generally suffer from problems such as the inability to achieve lightweight design and the failure to maximize the effective volume of the washing machine drum. Summary of the Invention

[0006] This invention proposes a vibration damping device for washing machines, which can achieve vibration damping effects in a lighter weight, reduce transportation costs, and increase service life.

[0007] The technical solution of the present invention is as follows:

[0008] A vibration damping device for a washing machine includes a main connecting bracket, on which a variable tuned mass damping water tank is suspended, and the variable tuned mass damping water tank is provided with a water passage structure.

[0009] Furthermore, the variable tuned mass damping water tank has inclined surfaces on both sides.

[0010] Furthermore, the bottom of the variable tuned mass damping water tank is provided with an arc-shaped recessed structure.

[0011] Furthermore, the variable tuned mass damping water tank is provided with a first damping layer, a second damping layer and a third damping layer in sequence from top to bottom. A first plate is provided between the first damping layer and the second damping layer, and a second plate is provided between the second damping layer and the third damping layer.

[0012] Furthermore, both the first and second layers have a "V" shaped cross-section and are inclined.

[0013] Furthermore, the water passage structure includes a first water inlet, a second water inlet, and a third water inlet, wherein the first water inlet is connected to the first vibration damping layer, the second water inlet is connected to the second vibration damping layer, and the third water inlet is connected to the third vibration damping layer.

[0014] The variable-tunable mass damping water tank is also provided with several air pressure balance holes, each of which is connected to the first damping layer, the second damping layer and the third damping layer.

[0015] Furthermore, the main connecting bracket is provided with a top beam, and the variable tuned mass damping water tank is provided with several suspension springs at its top. One end of each suspension spring is connected to the variable tuned mass damping water tank, and the other end of each suspension spring is connected to the top beam.

[0016] Furthermore, the device includes a casing and an outer barrel. The main connecting bracket is located inside the casing, and both sides of the casing are provided with supporting beams. Several elastic support blocks are provided on the supporting beams, and the outer wall of the outer barrel abuts against each elastic support block.

[0017] Furthermore, it includes several spring dampers, the bottom of the main connecting bracket is at a higher level than the bottom of the outer casing, and the two ends of each spring damper are respectively connected to the bottom of the outer casing and the bottom of the main connecting bracket;

[0018] Furthermore, each spring damper is installed at an angle.

[0019] Furthermore, it includes a support frame connected to the outer casing of the machine body, the support frame being provided with a roller spherical bearing assembly for connecting the inner drum of the washing machine, the roller spherical bearing assembly being connected to a driven wheel;

[0020] It includes a drive unit and a reversing damping mechanism for driving the driven wheel to rotate in the opposite direction to the drive unit.

[0021] The working principle and beneficial effects of this invention are as follows:

[0022] 1. Regarding traditional washing machine vibration reduction technology, this embodiment employs a variable mass water tank vibration reduction system based on the principle of tuned dampers. A major advantage of tuned damping is its strong adaptive characteristic in dynamic vibration absorption. By measuring the eccentric mass and injecting water of a corresponding mass, the vibration energy of the main system is transferred to the added damping device, thereby reducing the vibration of the main system. This achieves both vibration reduction and lightweighting goals, while also reducing transportation costs.

[0023] 2. Depending on the different vibration frequency scenarios caused by eccentric mass vibration (divided into high and low vibration frequencies), the water level in the water tank also needs to be adjusted accordingly. Therefore, the water tank is divided into three layers. Water is added to different layers, which can distinguish the variable water tank vibration damping components into vibration damping components with different pendulum lengths. When the water level is in the upper layer, it is a short pendulum to deal with high frequency vibration, and when the water level is in the lower layer, it is a short pendulum to deal with high frequency vibration.

[0024] 3. The variable tuned mass damping water tank is equipped with a water inlet and an air pressure balance hole. The water flow is controlled through the water inlet to achieve mass adjustment of the tuned damper.

[0025] 4. The air pressure balance hole is designed to balance the atmospheric pressure inside and outside the water tank, making it easier to fill and drain water.

[0026] 5. The first and second layers are designed with an inclined V-shape to facilitate water drainage and further improve drainage efficiency.

[0027] 6. The main connecting bracket is connected to the outer shell of the washing machine body to further transmit the vibration from the eccentric clothes to the vibration damping water tank through the drive shaft connected to the inner tub, thereby reducing the vibration.

[0028] 7. The machine body has crossbeams on both sides of the waist, and four elastic support blocks are provided on each crossbeam. These blocks are used to cooperate with the support legs of the washing tub to fix the tub and provide support. They also provide elastic support and vibration reduction during the support process.

[0029] 8. The spring damper is installed at a relatively inclined angle in conjunction with the suspension point below the main connecting bracket. Firstly, it provides good support for the main connecting bracket and its internal components in the vertical direction. Secondly, it can effectively reduce the vibration of the washing machine in all directions, thereby reducing the overall amplitude of the washing machine.

[0030] 9. The design and coordination of the various vibration damping structures in this invention can greatly reduce the swing amplitude of the inner tub of the washing machine during vibration, and can greatly reduce the reserved gap between the inner tub and the outer tub, or between the outer tub and the outer shell of the machine body. Therefore, the size of the inner tub can be increased to obtain the maximum effective washing volume without changing the volume and size of the outer shell of the machine body. Attached Figure Description

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] Figure 1 This is a schematic diagram of the front structure of the embodiment;

[0033] Figure 2 This is a schematic diagram of the rear structure of the embodiment;

[0034] Figure 3 This is a schematic diagram of the main connecting bracket in the embodiment;

[0035] Figure 4 This is a front sectional view of the variable tuned mass damping water tank in the embodiment.

[0036] Figure 5 This is a side sectional view of the variable tuned mass damping water tank in the embodiment;

[0037] Figure 6 This is a schematic diagram of the reversing vibration damping mechanism in the embodiment;

[0038] Figure 7 This is a schematic diagram of the structure of an enhanced version of the embodiment;

[0039] Figure 8 This is a schematic diagram of the structure of the roller fisheye bearing assembly in the embodiment.

[0040] In the diagram: 11. Main connecting bracket; 111. Top beam; 112. Support beam; 12. Outer shell; 2. Variable tuned mass damping water tank; 21. Inclined surface; 22. Arc-shaped concave structure; 23. First damping layer; 24. Second damping layer; 25. Third damping layer; 26. First layer plate; 27. Second layer plate; 281. First water inlet; 282. Second water inlet; 283. Third water inlet; 29. ​​Air pressure balance hole; 31. Suspension spring; 32. Elastic support block; 33. Spring damper; 34. Connecting rod; 5. Outer tub; 6. Roller spherical bearing assembly; 71. Driver; 72. Adjustment wheel; 73. Conveyor belt; 74. Support wheel; 75. Driven wheel; 8. Inner tub; 9. Bearing frame. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0042] like Figures 1 to 3 As shown, a vibration damping device for a washing machine includes a main connecting bracket 11, used to support and install various components such as the inner tub 8 and outer tub 5 of the washing machine. To further improve the vibration damping effect of the washing machine and to reduce its weight, this embodiment suspends a variable-tunable mass damping water tank 2 on the main connecting bracket 11, and provides a water-passing structure on the variable-tunable mass damping water tank 2. The water volume in the variable-tunable mass damping water tank 2 is changed through the water-passing structure, thereby achieving variable tuning.

[0043] In this embodiment, the variable-tunable mass damping water tank 2 has inclined surfaces 21 on both sides, which can be adapted to the top structure of the main connecting bracket 11, reducing the space occupied. At the same time, it can also be combined with the arc-shaped recessed structure 22 at the bottom to divide the variable water tank into vibration damping components with different swing lengths. The arc-shaped recessed structure 22 can also leave space for the installation of the washing machine outer tub 5, reducing the overall size of the washing machine.

[0044] like Figure 4 As shown, specifically, the variable-tunable mass damping water tank 2 has a first damping layer 23, a second damping layer 24, and a third damping layer 25 arranged sequentially from top to bottom. A first plate 26 is provided between the first damping layer 23 and the second damping layer 24, and a second plate 27 is provided between the second damping layer 24 and the third damping layer 25. The three damping layers are separated by two plates. Since the volume and structure of each layer of the variable-tunable mass damping water tank 2 are different, when the water level is at the first damping layer 23, it is a short pendulum to cope with high-frequency vibrations, and when the water level is at the third damping layer 25, it is a short pendulum to cope with low-frequency vibrations.

[0045] Furthermore, in this embodiment, the cross-sections of the first layer plate 26 and the second layer plate 27 are designed in a "V" shape and are inclined. The first water inlet 281, the second water inlet 282, and the third water inlet 283 in the water-passing structure are connected to the first vibration damping layer 23, the second vibration damping layer 24, and the third vibration damping layer 25, respectively. All three water inlets are located at the low water level of each layer for easy drainage. In this embodiment, the first water inlet 281, the second water inlet 282, and the third water inlet 283 all have both inlet and outlet functions, which can be achieved by simultaneously connecting inlet and outlet pipes, etc., as will not be elaborated upon in this embodiment.

[0046] In this embodiment, the variable-tunable mass damping water tank 2 is also provided with several pressure balancing holes 29. Each pressure balancing hole 29 is connected to the first damping layer 23, the second damping layer 24, and the third damping layer 25, respectively, to balance the atmospheric pressure inside and outside each layer of the variable-tunable mass damping water tank 2, facilitating water filling and emptying. Pressure relief valves or waterproof and breathable membranes can also be attached to the pressure balancing holes 29 for further optimization and use.

[0047] In terms of connection, the main connecting bracket 11 in this embodiment is provided with a top beam 111, and several suspension springs 31 are provided on the top of the variable-tunable mass damping water tank 2. One end of each suspension spring 31 is connected to the variable-tunable mass damping water tank 2, and the other end of each suspension spring 31 is connected to the top beam 111. The vibration generated during the operation of the washing machine is transmitted through the suspension springs 31, which can first absorb a part of the vibration and then transmit it to the variable-tunable mass damping water tank 2, further improving the vibration reduction effect of this embodiment. A connecting rod 34 (or a vibration damper can be used instead) is provided between the inclined surface 21 and the main connecting bracket 11. The two ends of the connecting rod 34 are respectively hinged to the inclined surface 21 and the main connecting bracket 11, which plays a role in auxiliary support, adjustment, and vibration absorption.

[0048] like Figure 3 As shown, as another embodiment, based on the above embodiment, a machine body shell 12 and an outer barrel 5 can be added. The main connecting bracket 11 is set inside the machine body shell 12, and support beams 112 are provided on both sides of the machine body shell 12. Several elastic support blocks 32 are provided on the support beams 112, so that the outer wall of the outer barrel 5 abuts against each elastic support block 32, and the vibration transmitted from the outer barrel 5 to the machine body shell 12 is reduced.

[0049] Furthermore, several spring dampers 33 are added, raising the bottom of the main connecting bracket 11 to a higher level than the bottom of the outer casing 12. Each spring damper 33 has its ends connected to the bottom of the outer casing 12 and the bottom of the main connecting bracket 11, respectively, providing auxiliary support for the main connecting bracket 11. Each spring damper 33 is also installed at an angle. This relatively inclined installation of the spring damping shock absorbers provides better vertical support for the main connecting bracket 11 and its internal components, and also effectively reduces the overall vibration of the washing machine in all directions, thereby reducing the overall amplitude of the washing machine's vibration.

[0050] The system includes a support frame connected to the outer casing 12. The support frame is equipped with a roller spherical bearing assembly 6 for connecting the inner drum of the washing machine. The roller spherical bearing assembly 6 combines a roller bearing and a spherical bearing arranged coaxially. Through the cooperation between the support frame and the roller spherical bearing assembly 6, utilizing the characteristics of roller bearings (low torque and high rotational accuracy) and spherical bearings (large load capacity, impact resistance, corrosion resistance, wear resistance, self-aligning, and good lubrication), the vibration transmitted from eccentrically positioned clothes through the drive shaft connected to the inner drum 8 to the main connecting bracket 11 is transmitted as much as possible to the variable tuned mass damping water tank 2, thus reducing some of the vibration.

[0051] like Figure 8 and Figure 2As shown, a bearing bracket 9 is provided to support the roller fisheye bearing assembly 6. It is fixed to the bottom of the outer shell 12 and has a triangular structure, which is firm and stable.

[0052] In addition, as another embodiment, based on the above embodiment, a driven wheel 75 can be connected to the roller spherical bearing assembly 6, and a driver 71 (preferably a motor, which is mature and reliable) and a reversing damping mechanism for driving the driven wheel 75 to rotate in opposite directions with the driver 71 can be added.

[0053] like Figure 6 As shown, the reversing vibration damping mechanism can reduce the combined rotational angular momentum of all rotating bodies, thereby reducing overall vibration. It can include at least two implementation methods: One method involves setting a conveyor belt 73, a regulating wheel 72, and several support wheels 74 on the outer side of the driven wheel 75. A driving wheel is mounted on the output shaft of the driver 71. The regulating wheel 72 and the driving wheel are then connected in a closed loop via the conveyor belt 73. The outer edges of both the regulating wheel 72 and the driving wheel abut against the inner side of the conveyor belt 73. A transmission surface is also provided on the outer side of the conveyor belt 73, abutting against the outer edge of the driven wheel 75. This arrangement, in conjunction with a protective cover plate, is used to install and fix the pulleys, achieving the effect that the rotation direction of the driver 71's output shaft is opposite to the rotation direction of the driven wheel 75. Furthermore, there is a gap between each regulating wheel 72 and the driven wheel 75, primarily used to support the inner side of the conveyor belt 73, maximizing the contact area between the conveyor belt 73 and the driven wheel 75, increasing resistance, and improving transmission efficiency.

[0054] Another method is to couple a drive wheel with a drive wheel, and then link the drive wheel with the driven wheel 75 or the rotating shaft of the inner tub 8 of the washing machine. Then, the rotation direction of the output shaft of the drive 71 can be opposite to the rotation direction of the inner tub 8 of the washing machine through chain drive, worm gear drive or gear drive. This embodiment will not be described in detail.

[0055] In this embodiment, an irregularly shaped water tank that can be filled and drained to change its weight is installed, and then suspended from the top inner side of the main connecting bracket 11 by a shock-absorbing spring. When the washing machine is driven, the inner tub 8 rotates. Due to the eccentricity of the contents (clothes and water), an imbalance occurs. (The periodic simple harmonic vibration generated by the unbalanced rotating mass as the vibration source of the vibration system is called the excitation force.) As a result, the entire washing machine vibrates. The kinetic energy generated by the vibration is transmitted to the main connecting bracket 11 through the drive shaft of the inner tub 8, and then further transmitted to the variable tuned mass damping water tank 2 through the main connecting bracket 11 and the suspension spring 31. At this time, the tuned mass damping water tank reduces the vibration.

[0056] In addition to the two or four shock-absorbing air columns of traditional washing machines, this product uses six spring dampers 33, which provides stronger support and also has a good shock absorption effect.

[0057] Unlike traditional washing machines that use damping blocks and gas springs directly mounted on the outer tub 5, this embodiment maximizes the diameter of the inner tub 8 and achieves lightweight design. This is mainly achieved by setting up a variable-mass tuned damping water tank (unlike the fixed-mass cement damping blocks used in traditional washing machines), moving the main connecting bracket 11 to the outside of the outer tub 5 (ensuring the inner tub 8 of the washing machine is as large as possible), and connecting the damping spring damper 33 to the main connecting bracket 11.

[0058] In addition, such as Figure 3 As shown, in another embodiment, based on the above embodiment, it can be divided into an inner tub 8 and an outer tub 5. The inner tub 8 is used for rotation and washing. It is connected to the roller fisheye bearing assembly 6 and the driven wheel 75 through connecting parts such as the rotating shaft. Since the above embodiment has already made the outer tub 5 abut against the elastic support block 32 on the main connecting bracket 11, the internal space of the main connecting bracket 11 can be utilized to the maximum extent. By increasing the diameter of the outer tub 5, the inner tub can also be enlarged to obtain the maximum effective volume of the washing inner tub 8.

[0059] like Figure 7 As shown, as another embodiment, a base or a functional box can be added to support the outer shell of the machine body, based on the above embodiment, for use as a higher version.

[0060] In addition, the driver 71 of the inner tub 8 drives the drive wheel, which in turn drives the meshing driven wheel 75, causing the driven wheel 75 to rotate in the opposite direction to the driver 71. The driven wheel 75 is connected in series with a pulley, which drives the inner tub 8 to rotate in the opposite direction to the inner tub 8's rotating motor.

[0061] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vibration damping device for a washing machine, comprising a main connecting bracket (11), characterized in that, A variable-tunable mass damping water tank (2) is suspended on the main connecting bracket (11), and the variable-tunable mass damping water tank (2) is provided with a water passage structure. The variable tuned mass damping water tank (2) is provided with a first damping layer (23), a second damping layer (24) and a third damping layer (25) from top to bottom. A first plate (26) is provided between the first damping layer (23) and the second damping layer (24), and a second plate (27) is provided between the second damping layer (24) and the third damping layer (25). The water passage structure includes a first water inlet (281), a second water inlet (282) and a third water inlet (283). The first water inlet (281) is connected to the first vibration damping layer (23), the second water inlet (282) is connected to the second vibration damping layer (24), and the third water inlet (283) is connected to the third vibration damping layer (25). The variable tuned mass damping water tank (2) is also provided with several air pressure balance holes (29), and each air pressure balance hole (29) is connected to the first damping layer (23), the second damping layer (24) and the third damping layer (25) in a one-to-one correspondence. It includes a support frame connected to the outer casing (12), the support frame being provided with a roller fisheye bearing assembly (6) for connecting the inner drum of the washing machine, the roller fisheye bearing assembly (6) being connected to a driven wheel (75).

2. The washing machine vibration damping device according to claim 1, characterized in that, The variable tuned mass damping water tank (2) has inclined surfaces (21) on both sides.

3. A washing machine vibration damping device according to claim 1 or 2, characterized in that, The bottom of the variable tuned mass damping water tank (2) is provided with an arc-shaped recessed structure (22).

4. A washing machine vibration damping device according to claim 1, characterized in that, The cross-sections of the first layer plate (26) and the second layer plate (27) are both V-shaped and inclined.

5. A washing machine vibration damping device according to claim 1 or 2, characterized in that, The main connecting bracket (11) is provided with a top beam (111) and the variable tuned mass damping water tank (2) is provided with several suspension springs (31) at the top. One end of each suspension spring (31) is connected to the variable tuned mass damping water tank (2) and the other end of each suspension spring (31) is connected to the top beam (111).

6. A washing machine vibration damping device according to claim 1 or 2, characterized in that, Includes a casing (12) and an outer barrel (5). The main connecting bracket (11) is located inside the casing (12), and both sides of the casing (12) are provided with support beams (112). Several elastic support blocks (32) are provided on the support beams (112). The outer wall of the outer barrel (5) abuts against each elastic support block (32).

7. A washing machine vibration damping device according to claim 6, characterized in that, Includes several spring dampers (33), the bottom of the main connecting bracket (11) is higher than the bottom of the outer shell (12), and the two ends of each spring damper (33) are respectively connected to the bottom of the outer shell (12) and the bottom of the main connecting bracket (11); Furthermore, each spring damper (33) is set at an angle.

8. A washing machine vibration damping device according to claim 1 or 2, characterized in that, It includes a drive (71) and a reversing damping mechanism for driving the driven wheel (75) to rotate in the opposite direction to the drive (71).

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