Damping device and washing machine having the same
Patent Information
- Application Number
- CN202522144314.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-10
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2035-10-10
AI Technical Summary
[0004]本实用新型的主要目的在于提供一种减振装置及具有其的洗衣机，以解决现有技术中洗衣机减振装置在多自由度振动情况下的减震效果较差而影响用户的使用体验的问题
[0017] By applying the technical solution of this utility model, when the washing machine drum shakes, especially when the second traction member is pulled by the drum's tension, causing the mounting structure to move away from the first end of the elastic structure, the second end of the elastic structure comes into contact with the casing, compressing and accumulating energy. Meanwhile, the damping medium is coated on the inner wall of the mounting cavity, forming an oil damping effect, further suppressing vibrations caused by the washing machine's unbalanced rotation. In this way, the elastic structure and the damping medium form a parallel damping effect. When the washing machine drum vibrates, the elastic structure offsets part of the vibration energy through its elastic force, allowing the drum to return to its equilibrium position. The damping medium dissipates energy, converting vibration energy into heat energy through its viscous resistance, further suppressing vibration. The two different mechanisms mentioned above complement each other, so that the energy storage and shock absorption function of the elastic structure and the energy dissipation function of the damping medium work together on the washing machine drum, achieving the goal of good shock absorption effect under different vibration amplitudes and multi-degree-of-freedom vibration. This solves the problem that the existing washing machine vibration damping device has poor shock absorption effect under multi-degree-of-freedom vibration, which affects the user experience, and improves the overall operating stability of the washing machine and reduces noise.
Smart Images
Figure CN224728777U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of washing machine technology, and more specifically, to a vibration damping device and a washing machine having the same. Background Technology
[0002] Currently, as a common household appliance, the vibration problem of washing machines during the washing and spin-drying process has long been a focus of research.
[0003] In existing technologies, washing machine vibration damping devices typically employ pure spring-type or pure damper-type vibration damping. During the operation of a drum washing machine, if the drum experiences large-amplitude vibrations, the existing vibration damping devices, due to their low support stiffness, cannot effectively limit drum displacement, leading to increased vibration of the washing machine casing and causing noise and stability issues. Conversely, if the drum experiences small-amplitude vibrations, the existing vibration damping devices, due to their excessive stiffness, cannot effectively absorb some vibration energy, resulting in increased vibration transmission efficiency and impacting user experience. Especially under multi-degree-of-freedom vibration conditions, it is difficult to fully cover the vibration requirements of the washing machine in multiple directions, including vertical, horizontal, and rotational directions, thus limiting the vibration damping effect. Utility Model Content
[0004] The main purpose of this utility model is to provide a vibration damping device and a washing machine having the same, so as to solve the problem that the vibration damping effect of the existing washing machine vibration damping device is poor under multi-degree-of-freedom vibration conditions, which affects the user experience.
[0005] To achieve the above objectives, according to one aspect of the present invention, a vibration damping device is provided, comprising: a housing having a mounting cavity; a damping medium coated on at least a portion of the cavity wall of the mounting cavity; a vibration damping assembly including a mounting structure and an elastic structure disposed on the mounting structure, a first end of the elastic structure abutting against the mounting structure, the mounting structure being movably disposed within the mounting cavity; and a connecting assembly including a first traction member and a second traction member, the first traction member connecting a first side of the housing and the washing machine casing, and the second traction member connecting the mounting structure and the washing machine drum; wherein, when the washing machine drum shakes and the second traction member pulls the mounting structure toward a second side of the housing, the second end of the elastic structure abuts against the housing, at which time the elastic structure is in an energy storage state to reduce the vibration displacement of the washing machine drum.
[0006] Furthermore, the elastic structure is a truncated conical helical spring, with the large end of the truncated conical helical spring close to the first side of the housing.
[0007] Furthermore, the housing includes a first housing and a second housing, the first housing being connected to a first traction member, and a second end of an elastic structure being used to abut against the second housing; wherein at least a portion of the second housing covers the first housing to form a mounting cavity around the first housing; and / or, the first housing and the second housing are threaded together or connected by fasteners.
[0008] Furthermore, the first housing includes: a first connecting plate connected to the first traction member; a first annular plate, one end of which is connected to the first connecting plate; wherein, a damping medium is coated on the inner circumferential surface of the first annular plate.
[0009] Further, the second housing includes: a second connecting plate disposed opposite to the first connecting plate; a second annular plate, one end of which is connected to the second connecting plate; wherein the second annular plate is sleeved over at least a portion of the first annular plate for connection with the first annular plate.
[0010] Furthermore, the second housing has a through hole, and the mounting structure includes: a cylindrical part, the bottom of which abuts against the first end of the elastic structure; a guide post, one end of which is disposed inside the cylindrical part, and the other end of which passes through the through hole to connect with the second traction member; wherein the guide post passes through the elastic structure to guide the elastic structure, and the extension direction of the guide post is consistent with the extension and contraction direction of the elastic structure.
[0011] Furthermore, there is one elastic structure; or there are multiple elastic structures, which are spaced apart along the first direction and / or the second direction, with the first direction and the second direction forming an angle between them.
[0012] Furthermore, the vibration damping device also includes: a buffer structure disposed between the mounting structure and the first housing; wherein the buffer structure is bonded to the first housing and / or the mounting structure.
[0013] Furthermore, the vibration damping device also includes a friction-reducing bushing disposed between the through hole and the guide post; wherein the friction-reducing bushing is made of graphene.
[0014] Furthermore, the first traction member is threadedly connected to the first housing, and the first traction member is provided with a first stop block for limiting and stopping the first housing; and / or, the second traction member is threadedly connected to the guide post, and the second traction member is provided with a second stop block for limiting and stopping the guide post.
[0015] Furthermore, the first traction element and / or the second traction element are steel ropes.
[0016] According to another aspect of the present invention, a washing machine is provided, comprising: a washing machine casing; a washing machine drum, the washing machine drum being an outer drum and disposed within the washing machine casing; an inner drum, rotatably disposed within the outer drum; a hanging spring, the upper end of the outer drum being connected to the washing machine casing via the hanging spring; and a vibration damping device, the lower end of the outer drum being connected to the washing machine casing via the vibration damping device; wherein the vibration damping device is the aforementioned vibration damping device.
[0017] By applying the technical solution of this utility model, when the washing machine drum shakes, especially when the second traction member is pulled by the drum's tension, causing the mounting structure to move away from the first end of the elastic structure, the second end of the elastic structure comes into contact with the casing, compressing and accumulating energy. Meanwhile, the damping medium is coated on the inner wall of the mounting cavity, forming an oil damping effect, further suppressing vibrations caused by the washing machine's unbalanced rotation. In this way, the elastic structure and the damping medium form a parallel damping effect. When the washing machine drum vibrates, the elastic structure offsets part of the vibration energy through its elastic force, allowing the drum to return to its equilibrium position. The damping medium dissipates energy, converting vibration energy into heat energy through its viscous resistance, further suppressing vibration. The two different mechanisms mentioned above complement each other, so that the energy storage and shock absorption function of the elastic structure and the energy dissipation function of the damping medium work together on the washing machine drum, achieving the goal of good shock absorption effect under different vibration amplitudes and multi-degree-of-freedom vibration. This solves the problem that the existing washing machine vibration damping device has poor shock absorption effect under multi-degree-of-freedom vibration, which affects the user experience, and improves the overall operating stability of the washing machine and reduces noise. Attached Figure Description
[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:
[0019] Figure 1 A schematic diagram of an embodiment of the vibration damping device according to the present invention is shown;
[0020] Figure 2 It shows Figure 1 A cross-sectional view of the vibration damping device in section AA;
[0021] Figure 3 A front view of an embodiment of a washing machine according to the present invention is shown.
[0022] The above figures include the following reference numerals:
[0023] 10. Housing; 11. Mounting cavity; 12. First housing; 121. First connecting plate; 122. First annular plate; 13. Second housing; 131. Second connecting plate; 132. Second annular plate; 133. Through hole;
[0024] 20. Damping medium;
[0025] 30. Installation structure; 31. Cylindrical part; 32. Guide column;
[0026] 40. Elastic structure;
[0027] 50. First traction component; 51. First stop block;
[0028] 60. Second traction component; 61. Second stop block;
[0029] 70. Washing machine casing;
[0030] 80. Washing machine drum;
[0031] 90. Buffer structure;
[0032] 100. Anti-friction bushing;
[0033] 110. Hanging spring;
[0034] 120. Vibration damping device. Detailed Implementation
[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0036] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0037] In this utility model, unless otherwise stated, directional terms such as "upper" and "lower" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" are generally used in relation to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.
[0038] To address the problem that existing washing machine vibration damping devices have poor damping performance under multi-degree-of-freedom vibration conditions, thus affecting the user experience, this application provides a vibration damping device and a washing machine having the same.
[0039] like Figures 1 to 3As shown, the vibration damping device includes a housing 10, a damping medium 20, a vibration damping assembly, and a connecting assembly. The housing 10 has a mounting cavity 11, and the damping medium 20 is coated on at least a portion of the cavity wall of the mounting cavity 11. The vibration damping assembly includes a mounting structure 30 and an elastic structure 40 disposed on the mounting structure 30. The first end of the elastic structure 40 abuts against the mounting structure 30, and the mounting structure 30 is movably disposed within the mounting cavity 11. The connecting assembly includes a first traction member 50 and a second traction member 60. The first traction member 50 connects the first side of the housing 10 and the washing machine casing 70, and the second traction member 60 connects the mounting structure 30 and the washing machine drum 80. When the washing machine drum 80 shakes and the second traction member 60 pulls the mounting structure 30 toward the second side of the housing 10, the second end of the elastic structure 40 abuts against the housing 10. At this time, the elastic structure 40 is in an energy storage state to reduce the vibration displacement of the washing machine drum 80.
[0040] Applying the technical solution of this embodiment, when the washing machine drum 80 shakes, especially when the second traction member 60 is pulled by the washing machine drum 80, causing the mounting structure 30 to move away from the first end of the elastic structure 40, the second end of the elastic structure 40 abuts against the casing 10, begins to compress and accumulate energy, and the damping medium 20 is coated on the inner wall of the mounting cavity 11 to form an oil damping effect, thereby further suppressing the vibration caused by the unbalanced rotation of the washing machine. In this way, the elastic structure 40 and the damping medium 20 form a parallel connection in terms of shock absorption. When the washing machine drum vibrates, the elastic structure 40 offsets part of the vibration energy through its elastic force, allowing the washing machine drum to return to its equilibrium position. The damping medium 20 dissipates energy, converting vibration energy into heat energy through the viscous resistance of the damping medium 20, thereby further suppressing vibration. The two different mechanisms mentioned above complement each other, so that the energy storage and shock absorption function of the elastic structure 40 and the energy dissipation function of the damping medium 20 work together on the washing machine drum, achieving the goal of good shock absorption effect under different vibration amplitudes and multi-degree-of-freedom vibration. This solves the problem that the existing washing machine vibration damping device has poor shock absorption effect under multi-degree-of-freedom vibration, which affects the user experience, and improves the overall operating stability of the washing machine and reduces noise.
[0041] In this embodiment, the damping medium 20 is damping oil.
[0042] In this embodiment, the elastic structure 40 is a truncated conical coil spring, with the large end of the truncated conical coil spring close to the first side of the casing 10. Thus, because the truncated conical coil spring has variable stiffness characteristics—that is, it exhibits low stiffness at small amplitudes and automatically adjusts to high stiffness at large amplitudes—it can provide sufficient support when the washing machine drum 80 vibrates with large amplitude, while providing lower stiffness at small amplitudes to reduce vibration transmission. This effectively reduces the vibration displacement of the washing machine drum 80, improves the overall operational stability of the washing machine, and reduces noise.
[0043] Specifically, the stiffness of the truncated cone helical spring increases with its compression deformation. That is, under large-amplitude vibration, when the large end near the first side of the casing 10 is subjected to force, the spring's compression deformation increases, thus increasing the stiffness of the truncated cone helical spring and providing stronger support and restoring force. Conversely, under small-amplitude vibration, the spring's compression deformation is small, and its stiffness is low, allowing the washing machine drum 80 to vibrate freely to a certain extent without excessively hardening the system's dynamic response. This ensures the washing machine's smooth operation, avoids unnecessary energy loss, and improves vibration damping efficiency.
[0044] like Figure 1 and Figure 2 As shown, the housing 10 includes a first housing 12 and a second housing 13. The first housing 12 is connected to the first traction member 50, and the second end of the elastic structure 40 is used to abut against the second housing 13. At least a portion of the second housing 13 covers the first housing 12 to form a mounting cavity 11 around the first housing 12. Alternatively, the first housing 12 and the second housing 13 are threaded together or connected by fasteners. Thus, the second housing 13 covers the first housing 12, forming a closed mounting cavity 11, thereby providing a more stable and controlled working environment for the elastic structure 40. When the second end of the elastic structure 40 abuts against the second housing 13, it can compress and recover within a defined space, preventing accidental contact between the spring and external structures and reducing noise and vibration caused by impacts. Simultaneously, this design helps maintain the spring in a correctly aligned state, avoiding a decrease in damping efficiency due to misalignment or tilting, thereby improving the overall damping performance of the damping device.
[0045] In this embodiment, the first housing 12 and the second housing 13 are connected by threads. This not only ensures the overall structural stability of the housing 10 but also effectively enhances the sealing of the mounting cavity 11. Good sealing is crucial for maintaining the working state of the damping medium 20, preventing leakage of the damping medium 20, and also preventing external impurities from entering, thus maintaining the normal operation of the damper. In this way, the aforementioned stable and sealed housing structure ensures that the shock absorption components can reliably function under various operating conditions, especially when the washing machine drum 80 vibrates, improving the stability and continuity of the shock absorption effect.
[0046] In other embodiments not shown in the accompanying drawings, the first housing 12 and the second housing 13 are connected by fasteners.
[0047] like Figure 2 As shown, the first housing 12 includes a first connecting plate 121 and a first annular plate 122. The first connecting plate 121 is connected to the first traction member 50. One end of the first annular plate 122 is connected to the first connecting plate 121. A damping medium 20 is coated on the inner circumferential surface of the first annular plate 122. This arrangement of the first connecting plate 121 ensures a direct and secure connection between the first housing 12 and the first traction member 50, guaranteeing a stable force transmission channel between the shock-absorbing assembly and the washing machine casing 70, reducing energy loss due to unstable connection. The damping medium 20 (such as damping oil) coated on the inner circumferential surface of the first annular plate 122 allows the damping medium 20 on the inner wall of the first annular plate 122 to dissipate vibration energy through viscous resistance when the mounting structure 30 moves within the first housing 12, especially when the washing machine drum 80 experiences significant shaking. This effectively controls the amplitude of vibration, reduces noise and vibration transmission during washing machine operation, and improves the overall operational stability of the washing machine and the user experience.
[0048] In this embodiment, the combination of the first annular plate 122 and the first connecting plate 121 not only provides sufficient space to accommodate the elastic structure 40 (such as a truncated cone helical spring) and the damping medium 20, but also optimizes the internal structural layout, ensuring the efficient operation of the damping assembly within a limited space. Compared to a planar plate, the annular plate design provides a larger contact area, resulting in a more uniform distribution of the damping medium 20 and enhancing the damping effect. Furthermore, the shape of the annular plate facilitates internal flow, allowing the damping medium 20 to function more effectively during movement, thereby improving the working efficiency and response speed of the damping assembly.
[0049] like Figure 2As shown, the second housing 13 includes a second connecting plate 131 and a second annular plate 132. The second connecting plate 131 is disposed opposite to the first connecting plate 121, and one end of the second annular plate 132 is connected to the second connecting plate 131. The second annular plate 132 is fitted over at least a portion of the first annular plate 122 for connection with it. Thus, the second annular plate 132, fitted over the first annular plate 122, not only enhances the sealing of the mounting cavity 11, preventing leakage of the damping medium 20 or intrusion of external contaminants, but also ensures the cleanliness and stability of the internal environment of the shock-absorbing assembly.
[0050] In this embodiment, the second connecting plate 131 is arranged opposite to the first connecting plate 121, so that the first housing 12 and the second housing 13 can be firmly and precisely connected together. This symmetrical design helps to evenly distribute the external force, ensuring that the force is smoothly transmitted between the two housings, reducing losses and ineffective movements during force transmission. When the washing machine drum 80 shakes, causing the mounting structure 30 to move, the second annular plate 132, as the support surface of the elastic structure 40, can accurately and timely receive the thrust from the elastic structure, effectively converting the vibration energy into elastic potential energy, which is then gradually dissipated through the viscous properties of the damping medium. This optimized force transmission path ensures that the shock absorption components can respond efficiently under various operating conditions, minimizing vibration and noise during washing machine operation.
[0051] like Figure 2 As shown, the second housing 13 has a through hole 133, and the mounting structure 30 includes a cylindrical portion 31 and a guide post 32. The bottom of the cylindrical portion 31 abuts against the first end of the elastic structure 40. One end of the guide post 32 is disposed inside the cylindrical portion 31, and the other end of the guide post 32 passes through the through hole 133 to connect with the second traction member 60. The guide post 32 passes through the elastic structure 40 to guide it, and its extension direction is consistent with the extension and contraction direction of the elastic structure 40. Thus, the guide post 32 passing through the elastic structure 40 ensures precise guidance of the elastic structure 40 during compression and recovery, thereby preventing the elastic structure from tilting or twisting during movement and maximizing its shock absorption function. Simultaneously, the other end of the guide post 32 passes through the through hole 133 on the second housing 13 and connects with the second traction member 60, forming a stable support and force transmission system. When the washing machine drum shakes and causes the elastic structure to compress, the precise guiding action of the guide column 32 ensures that the spring works effectively in the axial direction, avoiding the generation of lateral force and improving the accuracy and efficiency of shock absorption.
[0052] Specifically, the cooperation between the guide post 32 and the cylindrical part 31, and their connection through the through hole 133 of the second housing 13, together constitute a reliable force transmission structure. This arrangement not only enhances the structural stability of the entire vibration damping device, but also reduces wear on the elastic structure 40 during operation through the guiding effect of the guide post 32, preventing premature fatigue or damage of the spring under non-axial forces, thereby significantly extending the service life of the vibration damping components. Furthermore, the positioning of the guide post 32 helps the vibration damping device maintain good working condition after long-term operation, reducing the frequency of maintenance and replacement, and lowering the operating costs of the washing machine.
[0053] Optionally, there may be one elastic structure 40; or, there may be multiple elastic structures 40, spaced apart along a first direction and / or a second direction, with the first and second directions forming an angle. By selecting the number and arrangement of the elastic structures 40, multi-degree-of-freedom vibration reduction, adaptive stiffness adjustment, and enhanced system durability and reliability can be achieved. When there is only one elastic structure 40, it can provide lower stiffness at small amplitudes of the washing machine, reducing vibration transmission, and provide higher stiffness at large amplitudes, enhancing support capacity. When multiple elastic structures 40 are used, different springs can work independently in different directions, enabling not only adaptive stiffness adjustment in specific directions but also, through the combined action of multiple springs, achieving higher system stiffness and finer damping adjustment. This optimizes vibration reduction performance under a wider range of operating conditions, meeting the different vibration reduction needs of the washing machine during washing and spin-drying processes.
[0054] In this embodiment, there is one elastic structure 40, and the elastic structure 40 is sleeved on the guide post 32.
[0055] In other embodiments not shown in the accompanying drawings, there are multiple elastic structures 40, which are spaced apart along a first direction and / or a second direction, with the first and second directions forming an angle. This arrangement ensures that when the washing machine drum vibrates, forces in all directions are effectively absorbed and dispersed, reducing overall swaying and shaking caused by vibration in a single direction, improving the overall stability of the washing machine during operation, and reducing noise.
[0056] Optionally, the vibration damping device also includes a buffer structure 90. The buffer structure 90 is disposed between the mounting structure 30 and the first housing 12. The buffer structure 90 is bonded to the first housing 12 and / or the mounting structure 30. Thus, during washing machine operation, the aforementioned arrangement of the buffer structure 90 effectively absorbs these impact forces, reducing structural damage caused by collisions and extending the service life of the vibration damping device. Simultaneously, the bonding method ensures a tight, gapless connection between the buffer structure 90 and the first housing 12 and / or the mounting structure 30, preventing a decrease in buffering performance due to weak connections, and further enhancing the stability and reliability of the overall structure.
[0057] like Figure 2 As shown, the vibration damping device also includes a buffer structure 90. The buffer structure 90 is disposed between the mounting structure 30 and the first housing 12. The buffer structure 90 is bonded to the first housing 12. In this way, the buffer structure 90 can absorb and dampen the transient impact force transmitted to the mounting structure 30 by the vibration of the washing machine drum, significantly reducing the noise level during operation by reducing direct contact and collision between metal parts.
[0058] like Figure 2 As shown, the vibration damping device also includes a friction-reducing bushing 100. The friction-reducing bushing 100 is disposed between the through hole 133 and the guide post 32. The friction-reducing bushing 100 is made of graphene. Thus, the graphene-made friction-reducing bushing 100 reduces friction between the guide post 32 and the wall of the through hole 133 during movement, thereby helping to reduce energy loss, improve the operating efficiency of the vibration damping device, and ensure that the guide post 32 can move smoothly within the through hole 133 when the washing machine drum 80 vibrates, thereby achieving more precise force transmission and vibration damping effects.
[0059] Optionally, the first traction member 50 is threadedly connected to the first housing 12, and the first traction member 50 is provided with a first stop block 51 for limiting and stopping against the first housing 12; and / or, the second traction member 60 is threadedly connected to the guide post 32, and the second traction member 60 is provided with a second stop block 61 for limiting and stopping against the guide post 32. Thus, during the assembly of the first traction member 50 and the first housing 12, the first stop block 51 can play a role in assembly positioning and limiting, and during the assembly of the second traction member 60 and the guide post 32, the second stop block 61 plays a role in assembly positioning and limiting. Simultaneously, through the threaded connection, the first traction member 50 and the second traction member 60 can be easily adjusted and fixed in position, which not only simplifies the assembly process of the vibration damping device and improves assembly accuracy, but also allows users or maintenance personnel to easily adjust the position of the traction members according to actual needs (such as different working states of the washing machine drum or changes in the stiffness of the elastic structure 40) to adapt to different vibration damping requirements.
[0060] Optionally, the first traction member 50 and / or the second traction member 60 are steel ropes. In this way, the steel ropes can stably connect the washing machine drum 80 to other components of the vibration damping device, such as the first housing 12 or the guide column 32, ensuring that the vibration damping device can effectively absorb and disperse the vibration energy of the drum under various operating conditions of the washing machine. At the same time, the noise generated by the steel rope when transmitting vibration energy is far lower than that of traditional metal springs or rigid connectors; the flexibility and elasticity of the steel rope can absorb some vibration, reducing noise generation.
[0061] In this embodiment, both the first traction member 50 and the second traction member 60 are steel ropes. This arrangement of the steel ropes allows the washing machine drum 80 to vibrate freely in multiple directions, rather than just a single axial or radial vibration. This multi-degree-of-freedom damping capability better adapts to the complex vibration modes generated during washing and spin-drying, providing a more comprehensive and effective damping effect, further reducing the vibration and noise levels of the washing machine, and optimizing overall performance.
[0062] Optionally, the end of the first traction member 50 connected to the washing machine casing 70 has a first screw hole, and the first traction member 50 is fixedly connected to the washing machine casing 70 by the first screw.
[0063] Optionally, the end of the second traction member 60 connected to the washing machine drum 80 has a second screw hole, and the second traction member 60 is fixedly connected to the washing machine drum 80 by a second screw.
[0064] It should be noted that the steel rope is under tension regardless of the operating conditions of the washing machine.
[0065] like Figure 3 As shown, this application also provides a washing machine, including a washing machine casing 70, a washing machine drum 80, a washing machine inner drum, a hanging spring 110, and a vibration damping device 120. The washing machine drum 80 is an outer drum and is disposed inside the washing machine casing 70. The washing machine inner drum is rotatably disposed inside the outer drum. The upper end of the outer drum is connected to the washing machine casing 70 via the hanging spring 110. The lower end of the outer drum is connected to the washing machine casing 70 via the vibration damping device 120. The vibration damping device 120 is the aforementioned vibration damping device.
[0066] Specifically, when the washing machine is operating under small eccentric conditions, the vibration amplitude of the outer drum is small, the amplitude of the vibration damping device 120 is small, the stiffness change of the truncated conical coil spring is small and the stiffness value is relatively low. Therefore, the amount of vibration transmitted from the outer drum to the washing machine casing 70 is small (under the premise that the suspension mass remains unchanged, the dynamic stiffness of the support is weakened, the natural frequency of the system is reduced, and thus the transmission of vibration can be effectively reduced at high speeds).
[0067] When the washing machine operates under large eccentric conditions, the suspension system experiences significant vibration amplitude at certain speeds, which can easily cause it to collide with the washing machine casing 70. The vibration damping device 120, employing a truncated conical coil spring, addresses this by compressing the spring due to the large amplitude of the suspension. This compression converts some of the outer drum's kinetic energy into the spring's potential energy, thus reducing the amount of kinetic energy converted into gravitational potential energy and further lowering the drum's vibration amplitude. Additionally, the damping of the vibration damping device 120 dissipates energy, further reducing the outer drum's vibration amplitude.
[0068] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:
[0069] When the washing machine drum shakes, especially when the second traction component is pulled by the drum's tension, causing the mounting structure to move away from the first end of the elastic structure, the second end of the elastic structure comes into contact with the casing, compressing and accumulating energy. Meanwhile, the damping medium coated on the inner wall of the mounting cavity creates an oil damping effect, further suppressing vibrations caused by the washing machine's unbalanced rotation. In this way, the elastic structure and the damping medium work in parallel to reduce vibration. When the washing machine drum vibrates, the elastic structure uses its elastic force to offset some of the vibration energy, allowing the drum to return to its equilibrium position. The damping medium dissipates energy, converting vibration energy into heat through its viscous resistance, further suppressing vibration. The two different mechanisms mentioned above complement each other, so that the energy storage and shock absorption function of the elastic structure and the energy dissipation function of the damping medium work together on the washing machine drum, achieving the goal of good shock absorption effect under different vibration amplitudes and multi-degree-of-freedom vibration. This solves the problem that the existing washing machine vibration damping device has poor shock absorption effect under multi-degree-of-freedom vibration, which affects the user experience, and improves the overall operating stability of the washing machine and reduces noise.
[0070] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.
[0071] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0072] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.
[0073] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A vibration damping device characterized by comprising: include: The housing (10) has a mounting cavity (11); Damping medium (20) is coated on at least a portion of the cavity wall of the mounting cavity (11); The shock-absorbing assembly includes a mounting structure (30) and an elastic structure (40) disposed on the mounting structure (30), the first end of the elastic structure (40) abutting against the mounting structure (30), and the mounting structure (30) being movably disposed within the mounting cavity (11); The connecting assembly includes a first traction member (50) and a second traction member (60), the first traction member (50) connecting a first side of the housing (10) and the washing machine casing (70), and the second traction member (60) connecting the mounting structure (30) and the washing machine drum (80). When the washing machine drum (80) shakes and the second traction member (60) pulls the mounting structure (30) toward the second side of the housing (10), the second end of the elastic structure (40) abuts against the housing (10). At this time, the elastic structure (40) is in an energy storage state to reduce the vibration displacement of the washing machine drum (80).
2. The vibration damping device according to claim 1, characterized by The elastic structure (40) is a truncated cone helical spring, with the large end of the truncated cone helical spring close to the first side of the housing (10).
3. The vibration damping device according to claim 1, characterized by The housing (10) includes a first housing (12) and a second housing (13), the first housing (12) being connected to the first traction member (50), and the second end of the elastic structure (40) being used to abut against the second housing (13); wherein at least a portion of the second housing (13) covers the first housing (12) to form the mounting cavity (11) around the first housing (12); and / or, the first housing (12) and the second housing (13) are threaded together or connected by fasteners.
4. The vibration damping device according to claim 3, characterized by The first housing (12) includes: The first connecting plate (121) is connected to the first traction member (50); A first annular plate (122) is connected at one end to the first connecting plate (121); The damping medium (20) is coated on the inner circumferential surface of the first annular plate (122).
5. The vibration damping device according to claim 4, characterized by The second housing (13) includes: The second connecting plate (131) is disposed opposite to the first connecting plate (121); The second annular plate (132) has one end connected to the second connecting plate (131); The second annular plate (132) is sleeved on at least a portion of the first annular plate (122) to connect with the first annular plate (122).
6. The vibration damping device according to claim 3, characterized by The second housing (13) has a through hole (133), and the mounting structure (30) includes: The bottom of the cylindrical part (31) abuts against the first end of the elastic structure (40); Guide post (32), one end of the guide post (32) is disposed in the cylindrical part (31), and the other end of the guide post (32) passes through the through hole (133) to connect with the second traction member (60); The guide post (32) is inserted into the elastic structure (40) to guide the elastic structure (40), and the extension direction of the guide post (32) is consistent with the extension and contraction direction of the elastic structure (40).
7. The vibration damping device according to claim 1, characterized by The elastic structure (40) is one; or, the elastic structure (40) is multiple, and the multiple elastic structures (40) are spaced apart along the first direction and / or the second direction, with the first direction and the second direction forming an angle.
8. The vibration damping device according to claim 3, characterized by The vibration damping device also includes: A buffer structure (90) is disposed between the mounting structure (30) and the first housing (12); The buffer structure (90) is bonded to the first housing (12) and / or the mounting structure (30).
9. The vibration damping device according to claim 6, characterized by The vibration damping device also includes: A friction-reducing bushing (100) is disposed between the through hole (133) and the guide post (32); The wear-reducing bushing (100) is made of graphene.
10. The vibration damping device according to claim 6, characterized by The first traction member (50) is threadedly connected to the first housing (12), and the first traction member (50) is provided with a first stop block (51) for limiting and stopping the first housing (12); and / or, the second traction member (60) is threadedly connected to the guide post (32), and the second traction member (60) is provided with a second stop block (61) for limiting and stopping the guide post (32).
11. The vibration damping device of claim 1, wherein The first traction member (50) and / or the second traction member (60) are steel ropes.
12. A laundry machine characterized by include: Washing machine casing (70); The washing machine drum (80) is an outer drum and is disposed inside the washing machine casing (70); The inner drum of the washing machine is rotatably disposed inside the outer drum; Hanging spring (110), the upper end of the outer tub is connected to the washing machine casing (70) through the hanging spring (110); Vibration damping device (120), the lower end of the outer drum is connected to the washing machine casing (70) through the vibration damping device (120); The vibration damping device (120) is the vibration damping device according to any one of claims 1 to 11.