Shock-absorbing suspension rod and washing machine

Abstract

The present invention discloses a shock-absorbing hanger and a washing machine, wherein the shock-absorbing hanger comprises: a hanger; a damping sleeve, which is sleeved on the hanger; a variable damping chamber, which is arranged in the damping sleeve; a variable damping assembly, which is located in the variable damping chamber and provides a variable damping force for the hanger; the variable damping assembly comprises a viscous damping cylinder sleeved on the hanger and a friction damping ring sleeved on the outside of the viscous damping cylinder, and the viscous damping force between the viscous damping cylinder and the hanger is greater than the friction damping force between the friction damping ring and the inner wall of the variable damping chamber. A variable damping assembly is provided to provide a variable damping force for the hanger, and the variable damping assembly can provide different damping forces according to the amplitude of the hanger vibration, thereby ensuring the shock-absorbing effect and improving the shock-absorbing efficiency; and the variable damping assembly is realized by a purely mechanical structure, without the need for circuit control, so that the structure is simple and the reliability is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of washing machines, and in particular relates to a shock-absorbing suspension rod and a washing machine having the shock-absorbing suspension rod. Background Art

[0002] When the washing machine starts and runs the dehydration cycle, due to the unbalanced load of the washing items and the centrifugal force, the dehydration barrel of the washing machine will inevitably shake and resonate during the dehydration rotation operation. The outer barrel will shake or sway as the motor starts, causing large vibration and noise. If the vibration and resonance cannot be eliminated well, the machine will jump, hit the washing machine body or trigger the safety switch of the washing machine and fail to work normally. Therefore, a shock absorbing assembly must be installed in the washing machine. The shock absorbing assembly is suspended on the hanging seat of the outer barrel of the washing machine. When the fully automatic washing machine starts and runs the dehydration cycle, the outer barrel will shake or sway as the motor starts, causing large vibration and noise. The suspension rod of the shock absorbing assembly will also shake when the outer barrel sways, and the suspension rod will sway in different directions on the hanging seat of the outer barrel.

[0003] The vibration reduction components currently used in fully automatic washing machines at home and abroad can be roughly divided into one type: a vibration reduction spring type vibration reduction component for small-capacity washing machines, another type: an air damping + vibration reduction spring type vibration reduction component, and another type: a pure friction damping + vibration reduction spring type vibration reduction component. The vibration reduction spring type vibration reduction component is relatively simple and only relies on the vibration reduction spring to achieve the vibration reduction effect. The pure friction damping + vibration reduction spring type vibration reduction component achieves the vibration absorption effect by generating friction between a nylon slider or other rubber material and the middle suspension rod. The vibration reduction component of this structure has a simple structure and low cost, but the friction force is relatively fixed, and the greater the friction force, the faster the wear between the materials will be, which will cause the vibration reduction component to fail quickly. However, the above vibration reduction components cannot effectively prevent the shaking of the outer barrel in the front, back, left and right directions when the washing machine is under a large load and dehydration operation.

[0004] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] In view of the above problems in the prior art, the present invention proposes a shock-absorbing suspension rod, which is provided with a variable damping component to provide a variable damping force for the suspension rod. Different vibration amplitudes of the suspension rod can provide different damping forces, thereby ensuring the shock-absorbing effect and improving the shock-absorbing efficiency.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0007] A shock-absorbing suspension rod, comprising:

[0008] boom;

[0009] A damping sleeve, which is sleeved on the suspension rod;

[0010] A variable damping chamber, which is arranged in the damping sleeve;

[0011] A variable damping assembly, which is located in the variable damping cavity and provides a variable damping force for the suspension rod;

[0012] The variable damping assembly comprises a viscous damping cylinder sleeved on the suspension rod and a friction damping ring sleeved outside the viscous damping cylinder. The viscous damping force between the viscous damping cylinder and the suspension rod is greater than the friction damping force between the friction damping ring and the inner wall of the variable damping chamber.

[0013] Furthermore, the ratio of the viscous damping force to the friction damping force is greater than 2.

[0014] Furthermore, the variable damping assembly also includes an upper buffer member disposed in the variable damping chamber for mitigating the impact of the viscous damping cylinder on the upper wall of the variable damping chamber.

[0015] Furthermore, the variable damping assembly also includes a lower buffer member disposed in the variable damping chamber for mitigating the impact of the viscous damping cylinder on the lower wall of the variable damping chamber.

[0016] Furthermore, the distance between the upper buffer member and the lower buffer member is greater than the height of the viscous damping cylinder.

[0017] Furthermore, when the suspension rod is in a stable vibration range, the vibration amplitude of the suspension rod is less than or equal to the difference between the distance between the upper buffer and the lower buffer and the height of the viscous damping cylinder.

[0018] Furthermore, when the suspension rod drives the viscous damping cylinder to vibrate between the upper buffer and the lower buffer, the suspension rod and the viscous damping cylinder are relatively stationary, and the suspension rod is subjected to the friction damping force provided by the variable damping assembly.

[0019] Furthermore, the friction damping ring moves relative to the variable damping chamber.

[0020] Furthermore, after the viscous damping cylinder contacts the upper buffer member or the lower buffer member, the suspension rod and the viscous damping cylinder are relatively stationary, and the suspension rod is subjected to the friction damping force and the buffer damping force provided by the variable damping assembly.

[0021] Furthermore, when the buffer damping force is greater than or equal to the viscous damping force provided by the variable damping assembly, the suspension rod moves relative to the viscous damping cylinder, and the suspension rod is subjected to the viscous damping force provided by the variable damping assembly.

[0022] Furthermore, it also includes a sealing cover sealed with the damping sleeve and a base sleeved on the suspension rod, and the base can slide up and down in a closed cavity formed by the damping sleeve and the sealing cover.

[0023] Furthermore, it also includes a spring arranged in the closed cavity and sleeved on the suspension rod, and the spring is sleeved on the outside of the variable damping cavity.

[0024] Furthermore, the upper buffer member and the lower buffer member are made of sponge or rubber.

[0025] Based on the above-mentioned shock-absorbing hanger, the present invention also provides a washing machine with the above-mentioned shock-absorbing hanger, and a variable damping component is arranged to provide a variable damping force for the hanger. According to the different amplitudes of the hanger vibration, the variable damping component can provide different damping forces to ensure the shock-absorbing effect and improve the shock-absorbing efficiency.

[0026] A washing machine comprises a box body and the above-mentioned shock-absorbing suspension rod suspended on the box body.

[0027] Compared with the prior art, the advantages and positive effects of the present invention are: a variable damping component is provided to provide a variable damping force for the hanger, and the variable damping component can provide different damping forces according to the amplitude of the hanger vibration, thereby ensuring the shock absorption effect and improving the shock absorption efficiency; and the variable damping component is realized by a purely mechanical structure without the need for circuit control, thereby making the structure simple and increasing reliability; by setting the viscous damping force between the viscous damping cylinder and the hanger to be greater than the friction damping force between the friction damping ring and the inner wall of the variable damping chamber, when the vibration amplitude of the hanger is small, the viscous damping cylinder and the hanger are relatively still, and the viscous damping force does not play a role.

[0028] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic structural diagram of an embodiment of a shock-absorbing suspension rod proposed by the present invention;

[0031] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of ;

[0032] Figure 3 for Figure 2 An enlarged structural diagram of the middle damping sleeve;

[0033] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of the medium variable damping cavity. DETAILED DESCRIPTION

[0034] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0035] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the positional relationships shown in the accompanying drawings. The terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] See also Figure 1-Figure 4, is an embodiment of the shock-absorbing suspension rod proposed by the present invention, a shock-absorbing suspension rod comprises: a suspension rod 10, a damping sleeve 20, a variable damping chamber 21, and a variable damping assembly 30, the damping sleeve 20 is sleeved on the suspension rod 10, the variable damping chamber 21 is arranged in the damping sleeve 20, and the suspension rod 10 passes through the variable damping chamber 21; a variable damping assembly 30 is arranged in the variable damping chamber 21, and the variable damping assembly 30 provides a variable damping force for the suspension rod 10. The variable damping assembly 30 can provide different damping forces according to the different vibration amplitudes of the suspension rod 10. When the vibration amplitude of the suspension rod 10 is small and in a stable vibration range, the variable damping assembly 30 provides a smaller damping force to the suspension rod 10; when the vibration amplitude of the suspension rod 10 is large and in a resonance range, the variable damping assembly 30 provides a larger damping force to the suspension rod 10; it is conducive to rapid shock absorption, improving the shock absorption effect, and avoiding excessive shaking of the outer drum of the washing machine.

[0038] See also Figure 4 As shown, the variable damping assembly 30 comprises a viscous damping cylinder 31 sleeved on the suspension rod 10 and a friction damping ring 32 sleeved on the outside of the viscous damping cylinder 31 . The friction damping ring 32 is fixed on the viscous damping cylinder 31 , and the viscous damping cylinder 31 is slidably arranged on the suspension rod 10 . When the viscous damping cylinder 31 slides relative to the hanger 10, the viscous damping cylinder 31 provides a viscous damping force to the hanger 10 to damp the vibration of the hanger 10; the friction damping ring 32 contacts the inner wall of the variable damping chamber 21, and the friction damping ring 32 is pressed against the inner wall of the variable damping chamber 21. When the hanger 10 drives the viscous damping cylinder 31 to vibrate together, the friction damping ring 32 moves with the viscous damping cylinder 31, and the friction damping ring 32 moves relative to the variable damping chamber 21. A friction damping force is generated between the friction damping ring 32 and the inner wall of the variable damping chamber 21, and the friction damping force is transmitted to the hanger 10 through the friction damping ring 32 and the viscous damping cylinder 31 to damp the vibration of the hanger 10.

[0039] The viscous damping force between the viscous damping cylinder 31 and the hanger 10 is set to be greater than the friction damping force between the friction damping ring 32 and the inner wall of the variable damping chamber 21. It can be set that when the vibration amplitude of the hanger 10 is small, that is, when the hanger 10 is in a stable vibration range, the variable damping component 30 provides the friction damping force to the hanger 10. At this time, the viscous damping cylinder 31 and the hanger 10 need to be relatively still, and the viscous damping force does not play a role. When the vibration amplitude of the hanger 10 is large, especially when the hanger 10 is in the resonance range, the variable damping component 30 provides the hanger 10 with a viscous damping force, and the viscous damping cylinder 31 and the hanger 10 move relative to each other. The variable damping component 30 is realized by a purely mechanical structure, without the need for circuit control, so that the structure is simple and the reliability is increased.

[0040] Preferably, the viscous damping force between the viscous damping cylinder 31 and the hanger 10 is greater than twice the friction damping force between the friction damping ring 32 and the inner wall of the variable damping chamber 21, to ensure that when the hanger 10 is in a stable vibration range, the viscous damping cylinder 31 and the hanger 10 are relatively still, and only the friction damping force is generated between the friction damping ring 32 and the inner wall of the variable damping chamber 21 and transmitted to the hanger 10.

[0041] See also Figure 4 As shown, the variable damping assembly 30 also includes an upper buffer 33 disposed in the variable damping chamber 21, and the upper buffer 33 is used to mitigate the impact of the viscous damping cylinder 31 on the upper wall of the variable damping chamber 21. After the viscous damping cylinder 31 is blocked by the upward movement of the upper wall of the variable damping chamber 21, the suspension rod 10 continues to move upward relative to the viscous damping cylinder 31, and at this time, the viscous damping cylinder 31 provides a viscous damping force to the suspension rod 10. By providing the upper buffer 33, the viscous damping cylinder 31 is prevented from impacting the upper wall of the variable damping chamber 21, which causes damage to both the viscous damping cylinder 31 and the upper wall of the variable damping chamber 21, and also causes impact vibration. The upper buffer 33 buffers the impact of the viscous damping cylinder 31 and provides a buffering damping force.

[0042] The variable damping assembly 30 also includes a lower buffer 34 disposed in the variable damping chamber 21. The lower buffer 34 is used to mitigate the impact of the viscous damping cylinder 31 on the lower wall of the variable damping chamber 21. After the viscous damping cylinder 31 is stopped by the downward movement of the lower wall of the variable damping chamber 21, the suspension rod 10 continues to move downward relative to the viscous damping cylinder 31. At this time, the viscous damping cylinder 31 provides a viscous damping force to the suspension rod 10. By providing the lower buffer 34, the viscous damping cylinder 31 is prevented from impacting the lower wall of the variable damping chamber 21, which causes damage to both the viscous damping cylinder 31 and the lower wall of the variable damping chamber 21, and also causes impact vibration. The lower buffer 34 buffers the impact of the viscous damping cylinder 31 and provides a buffering damping force.

[0043] The upper buffer 33 and the lower buffer 34 are both made of compressed sponge, rubber or other materials. The variable damping chamber 21 is cylindrical, and the upper buffer 33 and the lower buffer 34 are both annular structures.

[0044] See also Figure 4As shown, the distance L between the upper buffer 33 and the lower buffer 34 is greater than the height H of the viscous damping cylinder 31. The height of the viscous damping cylinder 31 is the distance in the length direction of the suspension rod 10, and the suspension rod 10 is arranged in the up and down direction. When the vibration amplitude of the suspension rod 10 is small, that is, when the suspension rod 10 is in a stable vibration range, the viscous damping cylinder 31 vibrates between the upper buffer 33 and the lower buffer 34 with the suspension rod 10. At this time, the viscous damping cylinder 31 and the suspension rod 10 are relatively stationary, and the friction damping ring 32 moves with the viscous damping cylinder 31. The friction damping force is generated between the friction damping ring 32 and the inner wall of the variable damping chamber 21. The friction damping force is transmitted to the suspension rod 10 through the friction damping ring 32 and the viscous damping cylinder 31, that is, the variable damping assembly 30 provides the friction damping force to the suspension rod 10. At this time, the viscous damping cylinder 31 and the suspension rod 10 need to be relatively stationary, and the viscous damping force does not play a role.

[0045] When the suspension rod 10 is in a stable vibration range, the vibration amplitude of the suspension rod 10 is less than or equal to the difference between the distance L between the upper buffer 33 and the lower buffer 34 and the height H of the viscous damping cylinder 31, that is, the vibration amplitude of the suspension rod 10 is less than or equal to (LH). The distance between the upper buffer 33 and the lower buffer 34 can be adjusted according to the working condition of the suspension rod 10. It is preferred to set the suspension rod 10 in a stable vibration range, and the vibration amplitude of the suspension rod 10 is 5 to 8 mm.

[0046] When the vibration amplitude of the hanger 10 is large, especially when the hanger 10 is in the resonance range, the viscous damping cylinder 31 contacts the upper buffer 33 or the lower buffer 34 with the vibration of the hanger 10, and compresses the upper buffer 33 or the lower buffer 34, and after the variable damping chamber 21 gives the viscous damping cylinder 31 sufficient stopping force, the viscous damping cylinder 31 slides relative to the hanger 10, and the viscous damping cylinder 31 provides the hanger 10 with viscous damping force to damp the vibration of the hanger 10; at this time, the viscous damping cylinder 31 and the variable damping chamber 21 are relatively stationary.

[0047] When the viscous damping cylinder 31 moves upward with the hanger 10, contacts and compresses the upper buffer 33, the viscous damping cylinder 31 and the hanger 10 are relatively still, and the upper buffer 33 provides the viscous damping cylinder 31 with a downward buffer damping force. At this time, the viscous damping cylinder 31 and the hanger 10 also move upward together, and a friction damping force is generated between the friction damping ring 32 and the inner wall of the variable damping chamber 21. The friction damping force is transmitted to the hanger 10 through the friction damping ring 32 and the viscous damping cylinder 31, and the buffer damping force is transmitted to the hanger 10 through the viscous damping cylinder 31. At this time, the variable damping assembly 30 provides the hanger 10 with downward friction damping force and buffer damping force.

[0048] When the viscous damping cylinder 31 continues to move upward with the hanger 10 to compress the upper buffer 33, when the buffer damping force provided by the upper buffer 33 to the hanger 10 is greater than the viscous damping force provided by the viscous damping cylinder 31 to the hanger 10, the viscous damping cylinder 31 slides relative to the hanger 10, and the viscous damping cylinder 31 provides the viscous damping force to the hanger 10.

[0049] When the viscous damping cylinder 31 moves downward with the hanger 10, contacts and compresses the lower buffer 34, the viscous damping cylinder 31 and the hanger 10 are relatively still, and the lower buffer 34 provides an upward buffer damping force to the viscous damping cylinder 31. At this time, the viscous damping cylinder 31 and the hanger 10 also move downward together, and a friction damping force is generated between the friction damping ring 32 and the inner wall of the variable damping chamber 21. The friction damping force is transmitted to the hanger 10 through the friction damping ring 32 and the viscous damping cylinder 31, and the buffer damping force is transmitted to the hanger 10 through the viscous damping cylinder 31. At this time, the variable damping assembly 30 provides the hanger 10 with an upward friction damping force and a buffer damping force.

[0050] The shock-absorbing suspension rod also includes a sealing cover 40 sealed with the damping sleeve 20, and a base 50 sleeved on the suspension rod 10, and the base 50 is slidable up and down in a closed cavity 60 formed by the damping sleeve 20 and the sealing cover 40. The base 50 moves up and down with the suspension rod 10, and the base 50 and the closed cavity 60 provide air damping for the suspension rod 10. That is, the suspension rod 10 is also subjected to air damping force when vibrating.

[0051] The shock-absorbing suspension rod also includes a spring 70 arranged in the closed cavity 60, the spring 70 is sleeved on the suspension rod 10, and a spring seat 80 is sleeved on the suspension rod 10. The lower end of the spring 70 is located on the spring seat 80 and the upper end is located on the top wall of the closed cavity 60. The spring 70 is sleeved on the outside of the variable damping cavity 21.

[0052] The following specifically describes the working process of the suspension rod 10 when it vibrates. According to the different amplitudes of the suspension rod 10, it is divided into three cases:

[0053] A. When the vibration amplitude of the suspension rod 10 is small, that is, when the suspension rod 10 is in a stable vibration range, the viscous damping cylinder 31 vibrates with the suspension rod 10 between the upper buffer 33 and the lower buffer 34. At this time, the viscous damping cylinder 31 and the suspension rod 10 are relatively stationary, and the friction damping ring 32 moves with the viscous damping cylinder 31. Friction damping force is generated between the friction damping ring 32 and the inner wall of the variable damping chamber 21. The friction damping force is transmitted to the suspension rod 10 through the friction damping ring 32 and the viscous damping cylinder 31. That is, the variable damping assembly 30 provides friction damping force to the suspension rod 10. At this time, the viscous damping cylinder 31 and the suspension rod 10 need to be relatively stationary, and the viscous damping force does not play a role. When the suspension rod 10 is in a stable vibration range, the vibration amplitude of the suspension rod 10 is less than or equal to the difference between the distance between the upper buffer 33 and the lower buffer 34 and the height of the viscous damping cylinder 31.

[0054] B. When the vibration amplitude of the suspension rod 10 increases and does not reach the resonance range, that is, the viscous damping cylinder 31 is stationary relative to the suspension rod 10, there is a stage in which the viscous damping cylinder 31 moves between the upper buffer 33 and the lower buffer 34 and a stage in which the viscous damping cylinder 31 compresses the upper buffer 33 and the lower buffer 34. When the viscous damping cylinder 31 contacts the upper buffer 33 or the lower buffer 34 with the vibration of the suspension rod 10 and compresses the upper buffer 33 or the lower buffer 34, the viscous damping cylinder 31 and the suspension rod 10 are relatively stationary.

[0055] S10. The suspension rod 10 drives the viscous damping cylinder 31 to move upward from the lower buffer 34 to the upper buffer 33; the viscous damping cylinder 31 and the suspension rod 10 are relatively stationary, and the friction damping ring 32 moves with the viscous damping cylinder 31, and a friction damping force is generated between the friction damping ring 32 and the inner wall of the variable damping chamber 21, and the variable damping assembly 30 provides the friction damping force to the suspension rod 10.

[0056] S20. The hanger 10 drives the viscous damping cylinder 31 to contact and compress the upper buffer 33; the viscous damping cylinder 31 and the hanger 10 are relatively stationary, the viscous damping cylinder 31 moves upward to compress the upper buffer 33, and the upper buffer 33 provides the viscous damping cylinder 31 with a downward buffer damping force. At this time, the viscous damping cylinder 31 and the hanger 10 also move upward together, and a friction damping force is generated between the friction damping ring 32 and the inner wall of the variable damping chamber 21. The friction damping force is transmitted to the hanger 10 through the friction damping ring 32 and the viscous damping cylinder 31, and the buffer damping force is transmitted to the hanger 10 through the viscous damping cylinder 31. At this time, the variable damping assembly 30 provides the hanger 10 with downward friction damping force and buffer damping force.

[0057] The process in which the suspension rod 10 drives the viscous damping cylinder 31 to move downward is similar to S10 and S20 , and the lower buffer member 34 provides a buffer damping force, which will not be described in detail here.

[0058] C. When the vibration amplitude of the hanger 10 increases and is in the resonance range, the viscous damping cylinder 31 contacts the upper buffer 33 or the lower buffer 34 with the vibration of the hanger 10 and compresses the upper buffer 33 or the lower buffer 34, and after the variable damping chamber 21 gives the viscous damping cylinder 31 sufficient stopping force, the viscous damping cylinder 31 slides relative to the hanger 10, and the viscous damping cylinder 31 provides the hanger 10 with a viscous damping force to damp the vibration of the hanger 10; at this time, there are a stage in which the viscous damping cylinder 31 moves between the upper buffer 33 and the lower buffer 34, a stage in which the viscous damping cylinder 31 compresses the upper buffer 33 and the lower buffer 34, and a stage in which the viscous damping cylinder 31 moves relative to the hanger 10.

[0059] S10. The suspension rod 10 drives the viscous damping cylinder 31 to move upward from the lower buffer 34 to the upper buffer 33; the viscous damping cylinder 31 and the suspension rod 10 are relatively stationary, and the friction damping ring 32 moves with the viscous damping cylinder 31, and a friction damping force is generated between the friction damping ring 32 and the inner wall of the variable damping chamber 21, and the variable damping assembly 30 provides the friction damping force to the suspension rod 10.

[0060] S20. The hanger 10 drives the viscous damping cylinder 31 to contact and compress the upper buffer 33; the viscous damping cylinder 31 and the hanger 10 are relatively stationary, the viscous damping cylinder 31 moves upward to compress the upper buffer 33, and the upper buffer 33 provides the viscous damping cylinder 31 with a downward buffer damping force. At this time, the viscous damping cylinder 31 and the hanger 10 also move upward together, and a friction damping force is generated between the friction damping ring 32 and the inner wall of the variable damping chamber 21. The friction damping force is transmitted to the hanger 10 through the friction damping ring 32 and the viscous damping cylinder 31, and the buffer damping force is transmitted to the hanger 10 through the viscous damping cylinder 31. At this time, the variable damping assembly 30 provides the hanger 10 with downward friction damping force and buffer damping force.

[0061] S30. The viscous damping cylinder 31 is in the moving stage relative to the hanger 10; when the buffer damping force provided by the upper buffer 33 to the hanger 10 is greater than the viscous damping force provided by the viscous damping cylinder 31 to the hanger 10, that is, the variable damping chamber 21 provides sufficient stopping force to the viscous damping cylinder 31, the viscous damping cylinder 31 slides relative to the hanger 10, and the viscous damping cylinder 31 provides the viscous damping force to the hanger 10; at this time, the viscous damping cylinder 31 and the variable damping chamber 21 are relatively stationary, and the viscous damping cylinder 31 provides the viscous damping force to the hanger 10.

[0062] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A shock-absorbing suspension rod, characterized in that: include: boom; A damping sleeve, which is sleeved on the suspension rod; A variable damping chamber, which is arranged in the damping sleeve; A variable damping assembly, which is located in the variable damping cavity and provides a variable damping force for the suspension rod; The variable damping assembly comprises a viscous damping cylinder sleeved on the suspension rod and a friction damping ring sleeved on the outside of the viscous damping cylinder, and the viscous damping force between the viscous damping cylinder and the suspension rod is greater than the friction damping force between the friction damping ring and the inner wall of the variable damping chamber; It also includes a sealing cover that is sealed with the damping sleeve, and the damping sleeve and the sealing cover are arranged to form a closed cavity; It also includes a spring disposed in the closed cavity and sleeved on the suspension rod, wherein the spring is sleeved outside the variable damping cavity; The variable damping assembly further includes an upper buffer and a lower buffer disposed in the variable damping cavity; When the boom is in the resonance range, the working steps include: S10. The suspension rod drives the viscous damping cylinder to move upward from the lower buffer member to the upper buffer member during the moving stage; the viscous damping cylinder and the suspension rod are relatively stationary, and a friction damping force is generated between the friction damping ring and the inner wall of the variable damping chamber; S20. The suspension rod drives the viscous damping cylinder to contact and compress the upper buffer member; the viscous damping cylinder and the suspension rod are relatively stationary, the upper buffer member applies a downward buffer damping force to the viscous damping cylinder, and a friction damping force is generated between the friction damping ring and the inner wall of the variable damping chamber; S30. The viscous damping cylinder moves relative to the suspension rod; the viscous damping cylinder slides relative to the suspension rod, and the viscous damping cylinder provides a viscous damping force to the suspension rod.

2. The shock absorbing suspension rod according to claim 1, characterized in that: The upper buffer member is used to mitigate the impact of the viscous damping cylinder on the upper wall of the variable damping chamber.

3. The shock absorbing suspension rod according to claim 2, characterized in that: The lower buffer member is used to mitigate the impact of the viscous damping cylinder on the lower wall of the variable damping chamber.

4. The shock absorbing suspension rod according to claim 3, characterized in that: When the suspension rod is in a stable vibration range, the vibration amplitude of the suspension rod is less than or equal to the difference between the distance between the upper buffer and the lower buffer and the height of the viscous damping cylinder.

5. The shock absorbing suspension rod according to claim 3, characterized in that: When the suspension rod drives the viscous damping cylinder to vibrate between the upper buffer and the lower buffer, the suspension rod and the viscous damping cylinder are relatively stationary, and the suspension rod is subjected to the friction damping force provided by the variable damping assembly.

6. The shock absorbing suspension rod according to claim 3, characterized in that: After the viscous damping cylinder contacts the upper buffer or the lower buffer, the suspension rod and the viscous damping cylinder are relatively stationary, and the suspension rod is subjected to the friction damping force and the buffer damping force provided by the variable damping assembly.

7. The shock absorbing suspension rod according to claim 6, characterized in that: When the buffer damping force is greater than or equal to the viscous damping force provided by the variable damping assembly, the suspension rod moves relative to the viscous damping cylinder, and the suspension rod is subjected to the viscous damping force provided by the variable damping assembly.

8. The shock absorbing suspension rod according to any one of claims 1 to 7, characterized in that: It also includes a base sleeved on the suspension rod, and the base can slide up and down and is located in a closed cavity formed by the damping sleeve and the sealing cover.

9. A washing machine, characterized in that: The utility model comprises a box body and a shock-absorbing suspension rod as claimed in any one of claims 1 to 8 suspended on the box body.

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