Friction type vibration reduction hanging rod and washing machine

Abstract

The utility model discloses a friction type vibration reduction suspender and a washing machine. The friction type vibration reduction hanging rod comprises a piston rod, a supporting base and a supporting cap, the supporting base and the supporting cap are arranged on the piston rod in a sleeving mode, a containing cavity is formed between the supporting base and the supporting cap, the friction type vibration reduction hanging rod further comprises a damping piece and a piston piece, and the piston piece is arranged around the piston rod in a surrounding mode. The damping part is clamped between the piston part and the piston rod, the damping part and the piston part are contained in the containing cavity, and a sliding space for the piston part and the damping part to move in the containing cavity in the axial direction of the piston rod is formed in the containing cavity. The friction type vibration reduction hanging rod can adapt to large-amplitude vibration and small-amplitude vibration scenes of the washing machine at the same time, and the vibration reduction performance is stable and reliable. The washing machine comprises the friction type vibration reduction hanging rod.

Description

Technical Field

[0001] The present application relates to the technical field of damping and vibration reduction, and in particular to a friction-type vibration-reducing suspension rod and a washing machine. Background Art

[0002] Vibration damping components play a crucial role in washing machines. Connected between the inner and outer tubs, they ensure the inner tub is hoisted within the outer tub. During operation, the damping components generate sliding friction, creating damping that balances and reduces noise during washing and spinning, ensuring smooth operation.

[0003] However, due to the different vibration states experienced during operation, the conventional single-damping vibration-reduction components present several drawbacks when used in washing machines. While these conventional single-damping vibration-reduction components provide good vibration and noise reduction during low-speed conditions, such as the initial movement of the washing machine or during rinsing, they can have adverse effects during high-speed spin cycles. This is because high-speed rotation is a self-balancing state, and the vibration amplitude of the washing machine is relatively small. The larger damping force of the vibration-reduction component can disrupt the stability of the entire machine, affecting its overall performance. To address this issue, one existing improvement involves providing a free stroke for the damping unit, such as disclosed in Chinese Utility Model Patent Publication No. CN217536409U. However, in these conventional technologies, the damping unit's required free stroke prevents it from being compressed against the housing, resulting in a severely insufficient damping force and poor reliability, making it difficult to implement in actual products.

[0004] Based on this, it is necessary to propose a technical solution to overcome the shortcomings of the existing technology. Utility Model Content

[0005] The present application provides a friction-type vibration-damping suspension rod and a washing machine, which can adapt to both large-amplitude vibration and small-amplitude vibration scenarios of the washing machine, and has stable and reliable vibration-damping performance.

[0006] The present application is implemented through the following technical solution: a friction-type vibration-damping hanger, comprising a piston rod, and a support seat and a support cap sleeved on the piston rod, a receiving chamber being formed between the support seat and the support cap, the friction-type vibration-damping hanger also comprising a damping member and a piston member, the piston member being arranged around the piston rod, the damping member being clamped between the piston member and the piston rod, wherein the damping member and the piston member are accommodated in the receiving chamber, and the receiving chamber forms a sliding space for the piston member and the damping member to move axially along the piston rod in the receiving chamber.

[0007] As a further improved technical solution of the present application, the piston member is a hard plastic member, and the damping member is an elastic member.

[0008] As a further improved technical solution of the present application, at least one of the support seat and the support cap is provided with a stop portion for abutting against the damping member to limit the movement of the damping member and the piston member.

[0009] As a further improved technical solution of the present application, the length of the damping member in the axial direction is smaller than the length of the piston member in the axial direction, the damping member is covered inside the piston member, and the stop portion is a stop rib protruding from the support seat or the support cap toward the damping member.

[0010] As a further improved technical solution of the present application, when the stop rib contacts one end of the damping member, there is a distance between the corresponding end of the piston member and the support seat or the support cap.

[0011] As a further improved technical solution of the present application, the support seat and the support cap are both provided with the stop rib, and during the axial movement of the piston member and the damping member in the accommodating cavity, a portion of the stop rib is always within the coverage range of the piston member.

[0012] As a further improved technical solution of the present application, the stop rib is integrally formed with the support seat or the support cap.

[0013] As a further improved technical solution of the present application, the friction-type vibration-damping boom also includes a base and a boom seat respectively arranged at the two ends of the piston rod, and a spring sleeved on the piston rod. The support seat and the support cap are located between the base and the boom seat. The spring can be elastically stretched or compressed and arranged between the base and the support seat or support cap, or between the boom seat and the support seat or support cap.

[0014] As a further improved technical solution of the present application, the piston member and the damping member are relatively fixed to prevent relative movement of the two along the axial direction, and a clearance fit is formed between the piston member and the inner wall surface of the accommodating cavity.

[0015] The present application is also implemented through the following technical solution: a washing machine, which includes an inner drum, an outer drum and several friction-type vibration-damping hangers as described in any one of the above, wherein the several friction-type vibration-damping hangers are connected between the inner drum and the outer drum, wherein the friction-type vibration-damping hangers provide friction damping when the amplitude of the inner drum is greater than a preset value, and do not provide friction damping force when the amplitude of the inner drum is not greater than the preset value.

[0016] The friction-type vibration-damping hanger provided in the present application includes a damping member and a piston member, wherein the piston member is arranged around the piston rod, and the damping member is clamped between the piston member and the piston rod. The damping member and the piston member are accommodated in an accommodating cavity formed by a support seat and a support cap, and the accommodating cavity forms a sliding space for the piston member and the damping member to move axially along the piston rod in the accommodating cavity; that is, in the scheme of the present application, the damping member has a free stroke, so that it can simultaneously adapt to the large-amplitude vibration and small-amplitude vibration scenarios of the washing machine, and the damping member is installed in the piston member and is clamped between the piston member and the piston rod, so that the damping member can provide stable and reliable damping force, making the vibration reduction performance of the hanger more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional combination diagram of an embodiment of the friction-type vibration-damping boom of the present application.

[0018] Figure 2 It is along Figure 1 Sectional view along line AA.

[0019] Figure 3 This is a state diagram of a friction-type vibration-damping suspension rod in an embodiment of the present application in which there is free travel between the damping member and the support cap.

[0020] Figure 4 This is a state diagram of a friction-type vibration-damping suspension rod in an embodiment of the present application in which there is free travel between the damping member and the support seat.

[0021] Figure 5 It is a cross-sectional view of the support seat, support cap and piston member in one embodiment of the friction-type vibration-damping suspension rod of the present application.

[0022] Figure 6 It is a sectional view from a three-dimensional perspective of a support seat, a support cap and a piston member in one embodiment of a friction-type vibration-damping suspension rod of the present application.

[0023] The accompanying drawings are numbered as follows: 100-suspender rod; 1-piston rod; 2-support seat; 21, 31-stop ribs; 3-support cap; 30-accommodating chamber; 4-spring; 5-base; 6-suspender rod seat; 7-piston member; 71-fixed block; 8-damping member. DETAILED DESCRIPTION

[0024] In order to have a clearer understanding of the technical features, purposes and effects of this application, the specific implementation methods of this application are now described in detail with reference to the accompanying drawings.

[0025] The following is a clear and complete description of the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0026] See also Figures 1 to 6 As shown, the present application provides a friction-type vibration-damping hanger 100, which can be used on a washing machine. The friction-type vibration-damping hanger 100 includes a piston rod 1, and a support seat 2 and a support cap 3 sleeved on the piston rod 1, and a receiving chamber 30 is formed between the support seat 2 and the support cap 3. The friction-type vibration-damping hanger 100 also includes a damping member 8 and a piston member 7, and the piston member 7 is arranged around the piston rod 1, and the damping member 8 is clamped between the piston member 7 and the piston rod 1. The damping member 8 and the piston member 7 are accommodated in the receiving chamber 30, and the receiving chamber 30 is formed with a sliding space for the piston member 7 and the damping member 8 to move axially along the piston rod 1 in the receiving chamber 30.

[0027] The friction-type vibration-damping hanger 100 provided in this application has a damping member 8 with a free stroke. During small-amplitude vibration, the damping member 8 moves within the free stroke, that is, the damping member 8 does not provide a damping force or provides a small damping force. During large-amplitude vibration, the damping member 8 provides a large damping force. Therefore, the friction-type vibration-damping hanger 100 provided in this application can simultaneously adapt to large-amplitude vibration and small-amplitude vibration scenarios of the washing machine, and the damping member 8 is installed in the piston member 7 and is clamped between the piston member 7 and the piston rod 1, so that the damping member 8 can provide a stable and reliable damping force, thereby making the vibration reduction performance of the hanger 100 more stable and reliable.

[0028] See also Figure 1 and Figure 2 As shown, in this embodiment, the friction type vibration damping suspension rod 100 includes a piston rod 1, a support seat 2, a support cap 3, a spring 4, a base 5, a suspension rod seat 6, the piston member 7 and the damping member 8. Each component is described below.

[0029] The piston rod 1 is a metal rod in this embodiment, but in other embodiments, it can also be made of other materials. Both ends of the piston rod 1 are provided with a rounded structure to achieve a limited connection between the base 5 and the boom seat 6. In other embodiments, the end of the piston rod 1 can also be bent to form a structure for a limited connection, or connected to other components by screwing, riveting, welding, etc. to form the limited connection structure. In this embodiment, the main part of the piston rod 1 is a cylindrical rod, but in other embodiments, it can also be a rod body of other shapes.

[0030] The support base 2 and the support cap 3 are disposed on the outer circumference of the piston rod 1. The support base 2 and the support cap 3 are relatively fixed, and a receiving chamber 30 is formed between the support base 2 and the support cap 3. In this embodiment, the support base 2 is generally sleeve-shaped, with the receiving chamber 30 primarily formed by the support base 2, and the support cap 3 primarily serving as a cover, covering the opening of the support base 2. In other embodiments, the support cap 3 may primarily form the receiving chamber 30, while the support base 2 primarily serves as the cover. In other embodiments, both the support base 2 and the support cap 3 may be sleeve-shaped, and together they form the receiving chamber 30. In this embodiment, the support base 2 and the support cap 3 are secured together via a snap-fit ​​connection. In other embodiments, the connection between the support base 2 and the support cap 3 is not limited to a snap-fit ​​connection; other possible connection methods may be used, such as threaded connections, flange connections, bolt connections, rivet connections, etc. Furthermore, the support base 2 and the support cap 3 may be connected in a removable manner or in a non-removable manner, such as welding. The support base 2 and the support cap 3 also have a step formed thereon, which can be used to abut one end of the spring 4 sleeved on the piston rod 1 to compress the spring 4. In this embodiment, the step is formed at the edge of the mouth of the support base 2; in other embodiments, the step can also be formed at other locations on the support base 2 or on the support cap 3.

[0031] The base 5 and the boom seat 6 are respectively arranged at the two ends of the piston rod 1 and are limited by the pier-shaped structure at the end of the piston rod 1. The base 5 and the boom seat 6 are used to connect the boom 100 between the components that need to be damped. In this embodiment, the base 5 includes a limit platform, and the spring 4 is sleeved on the piston rod 1 and is limited between the limit platform of the base 5 and the step portion of the support seat 2. In this embodiment, the support seat 2 and the support cap 3 are located between the base 5 and the boom seat 6, and the spring 4 can be compressibly arranged between the base 5 and the support seat 2 to provide elastic damping force. Of course, in other embodiments, the spring 4 can also be arranged between the support seat 2 or the support cap 3 and the boom seat 6. In some embodiments, the spring 4 can also be arranged to be stretchably located between the base 5 and the support seat 2 or the support cap 3, or between the boom seat 6 and the support seat 2 or the support cap 3.

[0032] Please refer to Figures 2 to 4 As shown, in this embodiment, the piston member 7 is a hard plastic member, and the damping member 8 is an elastic member. The piston member 7 is used to support the damping member 8 and provide a clamping force to the damping member 8, ensuring that the damping member 8 has a stable and sufficient damping force. In this embodiment, the piston member 7 is made of POM plastic (Polyformaldehyde), which has high strength and excellent overall properties and is also known as steel or super steel. Of course, in other embodiments, the piston member 7 can also be made of other materials, such as metal or other plastics with suitable strength. In this embodiment, the piston member 7 is cylindrical and is located in the accommodating cavity 30 formed by the support seat 2 and the support cap 3. The piston member 7 has a clearance fit with the inner wall of the accommodating cavity 30. The axial length of the piston member 7 in the piston rod 1 is less than the axial length of the accommodating cavity 30, so that the piston member 7 has a free sliding travel in the axial direction of the accommodating cavity 30. That is, the distance between the two end surfaces of the piston member 7 is smaller than the distance between the inner end surface of the support seat 2 and the inner end surface of the support cap 3 .

[0033] Please continue reading Figures 2 to 4As shown, the damping member 8 is in close contact with the outer surface of the piston rod 1, and there is a large static friction force between the two. When the damping member 8 is not blocked in the direction of movement, the damping member 8 and the piston member 7 move together with the piston rod 1. In one embodiment, lubricating grease is provided between the damping member and the piston rod 1 to reduce wear. The axial length of the damping member 8 in the piston rod 1 is smaller than the axial length of the piston member 7 in the axial direction. The damping member 8 is covered in the piston member 7, that is, the two ends of the damping member 8 do not exceed the two ends of the piston member 7. The inner side surface of the piston member 7 may be provided with grooves, ribs and other structures for fixing the damping member 8, so that the piston member 7 and the damping member 8 are relatively fixed to prevent the two from moving relative to each other along the axial direction. Please refer to Figure 5 and Figure 6 As shown, in this embodiment, a fixed block 71 is provided on the inner wall surface of the piston member 7, and the damping member 8 is installed and fixed between two axially distributed fixed blocks 71. In one embodiment, the damping member 8 can be made of silicone. The damping member 8 can be a damping ring or a plurality of damping plates arranged in an annular shape.

[0034] Please refer to Figure 3 and Figure 4 As shown, at least one of the support seat 2 and the support cap 3 is provided with a stop portion for abutting against the damping member 8 to limit the movement of the damping member 8 and the piston member 7. In this embodiment, since the two ends of the damping member 8 are retracted compared to the two ends of the piston member 7, the stop portion needs to avoid the piston member 7 when in contact with the damping member 8 and protrude toward the damping member 8. In this embodiment, the stop portion is a stop rib 21, 31 protruding from the support seat 2 or the support cap 3 toward the damping member 8. In this embodiment, the stop ribs 21, 31 are provided on both the support seat 2 and the support cap 3, and the stop ribs 21, 31 are integrally formed with the support seat 2 or the support cap 3. As shown Figure 5 and Figure 6As shown, in this embodiment, the stop ribs 21 and 31 are annular ribs with a diameter smaller than the inner diameter of the fixed block 71. The annular ribs are located inside the fixed block 71. The stop ribs 21 and 31 may also be a plurality of discrete protruding ribs arranged in a circular pattern. This application does not limit the specific structure of the stop ribs 21 and 31. In this embodiment, the protruding length of the stop ribs 21 and 31 is greater than the distance between the same-side ends of the piston 7 and the damping element 8. In other words, when the stop ribs 21 and 31 contact one end of the damping element 8, a gap exists between the corresponding end of the piston 7 and the support base 2 or the support cap 3. This ensures that when the piston 7 and the damping element 8 move to their respective extreme positions, it is the damping element 8 that makes contact, rather than the piston 7 itself. Since the damping element 8 is a soft component, it does not produce any clashing sound. This prevents the piston 7 from clashing with the support base 2 or the support cap 3 and protects the piston 7. The lengths of the stop ribs 21 formed on the support base 2 and the stop ribs 31 formed on the support cap 3 may be the same or different. In this embodiment, during the axial movement of the piston member 7 and the damping member 8 within the accommodating cavity 30, portions of the stop ribs 21 and 31 are always within the coverage of the piston member 7. In other words, the stop ribs 21 and 31 can also serve as a guide on the inner side of the piston member 7, ensuring the stability of the sliding movement of the piston member 7.

[0035] Refer to the following Figure 3 and Figure 4 The working state of the friction-type vibration-damping boom 100 of the present application is described.

[0036] like Figure 3 As shown, when the piston rod 1 drives the damping member 8 and the piston member 7 to move to contact the stop rib 21 on the left support seat 2, the right side of the damping member 8 has a sliding space of length L1; at this time, if the piston rod 1 continues to move to the left, the piston rod 1 and the damping member 8 slide relative to each other, and a damping force is generated between the two; if the piston rod 1 moves to the right, the piston rod 1 drives the damping member 8 and the piston member 7 to move L1 distance in an automatic stroke without damping force, and then contacts the stop rib 31 on the right support cap 3, forming a space as shown in FIG. Figure 4 Status shown.

[0037] like Figure 4As shown, similarly, when the piston rod 1 drives the damping member 8 and the piston member 7 to move to contact the stop rib 31 on the right support cap 3, the left side of the damping member 8 has a sliding space of length L2; at this time, if the piston rod 1 continues to move to the right, the piston rod 1 and the damping member 8 slide relative to each other, and a damping force is generated between the two; if the piston rod 1 moves to the left, the piston rod 1 drives the damping member 8 and the piston member 7 to move L2 distance in an automatic stroke without damping force and then contact the stop rib 21 on the left support seat 2, forming a space as shown in FIG. Figure 3 Status shown.

[0038] The present application also provides a washing machine comprising an inner tub, an outer tub, and a plurality of friction-type vibration-damping hangers 100 as described above, wherein the plurality of friction-type vibration-damping hangers 100 are connected between the inner tub and the outer tub, wherein the friction-type vibration-damping hangers 100 provide friction damping when the amplitude of the inner tub is greater than a preset value, and do not provide friction damping force when the amplitude of the inner tub is less than the preset value. The preset value can be set according to actual application. In one embodiment, the washing machine is a pulsator washing machine.

[0039] From the above description of the specific embodiment, it can be seen that the friction-type vibration-damping hanger 100 provided in the present application includes a damping member 8 and a piston member 7, and the piston member 7 is arranged around the piston rod 1, and the damping member 8 is clamped between the piston member 7 and the piston rod 1. The damping member 8 and the piston member 7 are accommodated in the accommodating cavity 30 formed by the support seat 2 and the support cap 3, and the accommodating cavity 30 is formed with a sliding space for the piston member 7 and the damping member 8 to move axially along the piston rod 1 in the accommodating cavity 30; that is, in the scheme of the present application, the damping member 8 has a free stroke, so that it can adapt to the large-amplitude vibration and small-amplitude vibration scenarios of the washing machine at the same time, and the damping member 8 is installed in the piston member 7 and is clamped between the piston member 7 and the piston rod 1, so that the damping member 8 can provide stable and reliable damping force, making the vibration reduction performance of the hanger 100 more stable and reliable.

[0040] This application is illustrated by several specific embodiments, and those skilled in the art will appreciate that various modifications and equivalent substitutions may be made to this application without departing from the scope of this application. In addition, various modifications may be made to this application for specific circumstances or specific situations without departing from the scope of this application. Therefore, this application is not limited to the specific embodiments disclosed, but should include all implementation methods falling within the scope of the claims of this application.

Claims

1. A friction type vibration damping boom, comprising a piston rod, and a support seat and a support cap sleeved on the piston rod, characterized in that: A accommodating chamber is formed between the support seat and the support cap, and the friction-type vibration-damping suspension rod also includes a damping member and a piston member. The piston member is arranged around the piston rod, and the damping member is clamped between the piston member and the piston rod, wherein the damping member and the piston member are accommodated in the accommodating chamber, and the accommodating chamber forms a sliding space for the piston member and the damping member to move axially along the piston rod in the accommodating chamber.

2. The friction type vibration damping boom according to claim 1, characterized in that: The piston component is a hard plastic component, and the damping component is an elastic component.

3. The friction-type vibration-damping boom according to claim 1 or 2, characterized in that: At least one of the support seat and the support cap is provided with a stopper for abutting against the damping member to limit the movement of the damping member and the piston member.

4. The friction type vibration damping boom according to claim 3, characterized in that: The length of the damping member in the axial direction is smaller than the length of the piston member in the axial direction. The damping member is covered in the piston member. The stop portion is a stop rib protruding from the support seat or the support cap toward the damping member.

5. The friction type vibration damping boom according to claim 4, characterized in that: When the stop rib contacts one end of the damping member, a distance exists between the end of the piston member corresponding thereto and the support seat or the support cap.

6. The friction-type vibration-damping boom according to claim 4, wherein: The support seat and the support cap are both provided with the stop rib, and during the axial movement of the piston member and the damping member in the accommodating cavity, a portion of the stop rib is always within the coverage range of the piston member.

7. The friction type vibration damping boom according to claim 4, characterized in that: The stop rib is integrally formed with the support seat or the support cap.

8. The friction type vibration damping boom according to claim 1, wherein: The friction-type vibration-damping boom also includes a base and a boom seat respectively arranged at the two ends of the piston rod, and a spring sleeved on the piston rod. The support seat and the support cap are located between the base and the boom seat. The spring can be elastically stretched or compressed and arranged between the base and the support seat or support cap, or between the boom seat and the support seat or support cap.

9. The friction type vibration damping boom according to claim 2, wherein: The piston member and the damping member are relatively fixed to prevent relative movement of the two along the axial direction, and a clearance fit is formed between the piston member and the inner wall surface of the accommodating cavity.

10. A washing machine, characterized in that: It comprises an inner barrel, an outer barrel and a plurality of friction-type vibration-damping hangers as described in any one of claims 1 to 9, wherein the plurality of friction-type vibration-damping hangers are connected between the inner barrel and the outer barrel, wherein the friction-type vibration-damping hangers provide friction damping when the amplitude of the inner barrel is greater than a preset value, and do not provide friction damping force when the amplitude of the inner barrel is not greater than the preset value.

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