Shock absorber and washing machine

Abstract

The embodiment of the present application belongs to the technical field of washing machines, and particularly relates to a damper and a washing machine. The embodiment of the present application aims to solve the problem that when the eccentricity of the inner drum of the washing machine is large, the outer drum will collide with the cabinet to cause the cabinet to be displaced. The washing machine of the embodiment of the present application is characterized in that one end of the damper is hinged to the outer drum, the other end of the damper is hinged to the cabinet, the movable hole is arranged on the supporting drum, the friction assembly is arranged in the movable hole, the pressure adjusting mechanism is arranged on the supporting drum, the pressure adjusting mechanism is connected with the friction assembly, and the pressure adjusting mechanism is used for adjusting the preset pressure of the friction assembly on the friction drum according to the vibration amplitude of the outer drum. Through the above arrangement, when the vibration amplitude of the outer drum is large, the preset pressure is increased to effectively reduce the vibration of the outer drum; when the vibration amplitude of the outer drum is small, the preset pressure is reduced, which can not only reduce the vibration amplitude of the outer drum, but also reduce the noise generated due to the large friction force between the friction assembly and the friction drum.

Description

Technical Field

[0001] This invention relates to the field of washing machine technology, specifically to a vibration damper and a washing machine. Background Technology

[0002] A washing machine is a cleaning appliance that uses electrical energy to generate mechanical action to wash clothes. It can wash, rinse, and spin-dry clothes, and is an essential appliance in modern households.

[0003] In related technologies, a washing machine includes a cabinet, an inner drum, an outer drum, a vibration damper, and a motor. The inner drum, outer drum, and motor are all housed within the cabinet, with the outer drum fitted over the inner drum. The axis of the outer drum is collinear with the axis of the inner drum. The motor is connected to the inner drum via a drive mechanism to rotate it. Both the inner and outer drums are mounted on a rotating shaft, whose axis is collinear with the axis of the inner drum. The inner drum and the rotating shaft rotate synchronously, while the outer drum does not rotate. During the spin-drying cycle, the inner drum rotates at high speed. The clothes inside cause the inner drum to become eccentric during rotation, which in turn causes the rotating shaft to rotate eccentrically. This eccentric rotation of the rotating shaft leads to vibration in the outer drum. A greater degree of eccentricity in the inner drum results in a greater amplitude of vibration in the outer drum. The vibration damper is positioned between the outer drum and the cabinet to reduce the vibration of the outer drum.

[0004] However, since the damping force of the shock absorber is constant, when the vibration amplitude of the outer cylinder is large, the damping force provided by the shock absorber cannot effectively reduce the vibration, resulting in a large amplitude of the outer cylinder. The outer cylinder collides with the housing, causing the housing to shift and affecting the user experience. Summary of the Invention

[0005] The main objective of this invention is to provide a shock absorber and a washing machine to solve the problem that when the inner drum of the washing machine rotates with a large degree of eccentricity, the outer drum will collide with the casing, causing the casing to shift.

[0006] To achieve the above objectives, embodiments of the present invention provide a vibration damper, comprising: a friction cylinder, a support cylinder, a friction assembly, and a pressure regulating mechanism. A portion of the support cylinder passes through the friction cylinder, and a movable hole is provided on the cylinder wall of the support cylinder, the movable hole being directly opposite the friction cylinder. The friction assembly passes through the movable hole and is movable along the axis of the movable hole. The pressure regulating mechanism is disposed on the support cylinder and connected to the friction assembly. The pressure regulating mechanism is used to adjust the preset pressure exerted by the friction assembly on the friction cylinder according to the vibration amplitude of the outer cylinder.

[0007] In the preferred embodiment of the above-mentioned vibration damper, the friction assembly includes a support block, a stop plate, and a friction plate. The support block is movably inserted into the movable hole. The stop plate is disposed on the side of the support block facing the friction cylinder and is located outside the support cylinder. The projection of the movable hole on the stop plate is located inside the stop plate. The friction plate is disposed on the side of the stop plate facing the friction cylinder and is in contact with the stop plate.

[0008] In the preferred embodiment of the above-mentioned vibration damper, there are multiple movable holes, which are spaced apart circumferentially along the support cylinder; there are multiple friction components, each of which passes through a corresponding movable hole; the support block is provided with a connecting channel, the axis of the connecting channel is an arc, and the distance between each point on the axis of the connecting channel and the axis of the support cylinder is equal, and the distance between the connecting channels on the multiple support blocks and the axis of the support cylinder is equal; the friction component further includes a first reset member, which passes through the multiple connecting channels, and the two ends of the first reset member in the extending direction are connected, and the first reset component is used to move the support block away from the friction cylinder.

[0009] In the preferred embodiment of the above-mentioned vibration damper, the first reset member includes a first reset spring.

[0010] In the preferred embodiment of the above-mentioned shock absorber, the pressure regulating mechanism includes a moving block, a second reset member, and a traction device. The axis of the moving block is collinear with the axis of the support cylinder. The second reset member is disposed at one end of the moving block along its axial direction, and the traction device is disposed at the other end of the moving block along its axial direction. The traction device is used to apply a pulling force to the moving block in a direction away from the second reset member, so that the moving block applies pressure to the support block toward the friction cylinder. The second reset member is used to apply a pulling force to the moving block in a direction away from the traction device, so as to release the pressure of the moving block on the support block.

[0011] In the preferred embodiment of the above-mentioned shock absorber, the moving block is frustum-shaped, and the area of ​​the bottom surface of the moving block facing the traction device is smaller than the area of ​​the bottom surface of the moving block facing the second reset member; the support block has an abutment surface on the side away from the friction cylinder, and the abutment surface is used to fit against the side of the moving block.

[0012] In the preferred embodiment of the above-mentioned shock absorber, the second reset member includes a second reset spring, one end of the second reset spring extending in the direction of extension is connected to the end of the moving block away from the traction device, and the other end of the second reset spring extending in the direction of extension is connected to the end of the support cylinder.

[0013] In the preferred embodiment of the above-mentioned shock absorber, a limiting tube is provided on the inner side of the end of the support cylinder away from the traction device. The axis of the limiting tube is collinear with the axis of the support cylinder. The second return spring passes through the limiting tube. The distance between the end of the limiting tube facing the moving block and the support block is less than the axial height of the moving block.

[0014] In the preferred embodiment of the above-mentioned shock absorber, the traction device includes a traction motor and a traction rope. One end of the traction rope is connected to the end of the moving block away from the second reset member, and the other end of the traction rope is connected to the traction motor. The traction motor is used to move the moving block away from the second reset member.

[0015] This invention also provides a washing machine, including an outer drum, a housing, and the aforementioned shock absorber, wherein one end of the shock absorber is hinged to the outer drum, and the other end of the shock absorber is hinged to the housing.

[0016] Those skilled in the art will understand that the washing machine of this embodiment includes an outer drum, a housing, and a vibration damper. One end of the vibration damper is hinged to the outer drum, and the other end is hinged to the housing. The vibration damper includes a friction cylinder, a support cylinder, a friction assembly, and a pressure regulating mechanism. The support cylinder has a movable hole, and the friction assembly passes through the movable hole. The pressure regulating mechanism is disposed on the support cylinder and connected to the friction assembly. The pressure regulating mechanism is used to adjust the preset pressure of the friction assembly on the friction cylinder according to the vibration amplitude of the outer drum. With the above arrangement, when the vibration amplitude of the outer drum is large, the preset pressure of the friction assembly on the friction cylinder is increased to increase the friction between the friction assembly and the friction cylinder; while when the vibration amplitude of the outer drum is small, the preset pressure of the friction assembly on the friction cylinder is decreased to reduce the friction between the friction assembly and the friction cylinder. In this way, the damping force of the vibration damper can be changed according to the vibration amplitude of the outer cylinder. When the vibration amplitude of the outer cylinder is large, the vibration damper provides a large damping force to effectively reduce the vibration of the outer cylinder; when the vibration amplitude of the outer cylinder is small, the vibration damper provides a small damping force, which can reduce the vibration amplitude of the outer cylinder and also reduce the noise generated by the large friction between the friction component and the friction cylinder. Attached Figure Description

[0017] Preferred embodiments of the vibration damper and washing machine of the present invention will now be described with reference to the accompanying drawings. The drawings are as follows:

[0018] Figure 1 This is a schematic diagram of the structure of the vibration damper according to an embodiment of the present invention;

[0019] Figure 2 This is a cross-sectional view of the vibration damper according to an embodiment of the present invention;

[0020] Figure 3This is a schematic diagram of the structure of the support cylinder in the vibration damper according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the outer drum and vibration damper in a washing machine according to an embodiment of the present invention;

[0022] Figure 5 yes Figure 2 Enlarged view of point P in the middle;

[0023] Figure 6 This is a schematic diagram of the support cylinder and friction assembly in the vibration damper according to an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the friction assembly in the vibration damper according to an embodiment of the present invention.

[0025] In the attached image:

[0026] 100. Vibration damper; 200. Outer cylinder;

[0027] 110. Friction cylinder; 111. Second connecting plate;

[0028] 120. Support cylinder; 121. Movable hole;

[0029] 122. Limiting tube; 123. Third connecting plate;

[0030] 130. Friction assembly; 131. Support block;

[0031] 132. Stop plate; 133. Friction plate;

[0032] 134. Connecting channel; 135. First return spring;

[0033] 136. Contact surface; 140. Pressure regulating mechanism;

[0034] 141. Moving block; 142. Second return spring;

[0035] 143. Traction device; 144. Traction motor;

[0036] 145. Traction rope; 201. First connecting plate;

[0037] 202. First hinged column; 203. Fifth connecting plate;

[0038] 204. Fifth connecting hole; 301. Fixing plate;

[0039] 302. Fixing hole; 303. Fourth connecting plate;

[0040] 304. Second hinge post; 305. Hanging plate;

[0041] 306. Buffer spring; 307. First hook;

[0042] 308. Second hook. Detailed Implementation

[0043] First, those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0044] Secondly, it should be noted that in the description of the embodiments of the present invention, the terms "inner" and "outer", etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the present invention.

[0045] Furthermore, it should be noted that, in the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] The washing machine includes a cabinet, an inner drum, an outer drum, and a motor. The inner drum, outer drum, and motor are all housed within the cabinet. The outer drum is fitted over the inner drum, and the axis of the outer drum is collinear with the axis of the inner drum. The motor is connected to the inner drum via a drive mechanism to rotate it. Both the inner and outer drums are mounted on a rotating shaft, whose axis is collinear with the axis of the inner drum. The inner drum and the rotating shaft rotate synchronously, while the outer drum does not rotate.

[0048] When a washing machine is running the spin cycle, the inner drum rotates at high speed. The clothes inside the inner drum cause it to become eccentric during rotation, which in turn causes the rotating shaft to rotate eccentrically. This eccentric rotation of the rotating shaft causes the outer drum to vibrate. When the degree of eccentricity of the inner drum is large, the amplitude of the outer drum's vibration also increases, causing the outer drum to collide with the cabinet and displace the cabinet.

[0049] In related technologies, vibration dampers are often installed between the outer cylinder and the housing to reduce the vibration of the outer cylinder. However, since the damping force of the vibration damper is constant, when the vibration amplitude of the outer cylinder is large, the damping force provided by the vibration damper is small and cannot effectively reduce the vibration; when the vibration amplitude of the outer cylinder is small, the vibration damper still provides a relatively large damping force, resulting in the vibration damper generating a large amount of noise.

[0050] This embodiment provides a vibration damper and a washing machine. The preset pressure between the friction component and the friction drum is adjusted by a pressure adjustment mechanism, thereby adjusting the friction force between the friction component and the friction drum so that the damping force of the vibration damper changes with the vibration amplitude of the outer drum, thereby effectively reducing the vibration amplitude of the outer drum.

[0051] The principles and features of the embodiments of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the embodiments of the present invention and are not intended to limit the scope of the embodiments of the present invention.

[0052] The washing machine provided in this embodiment of the invention includes a casing and an inner drum, an outer drum 200, a motor, and a vibration damper 100 disposed within the casing. The outer drum 200 is sleeved outside the inner drum, and the axis of the outer drum 200 is collinear with the axis of the inner drum. The motor is connected to the inner drum via a transmission to drive the inner drum to rotate. A rotating shaft is rotatably disposed within the casing, and both the inner drum and the outer drum 200 pass through the rotating shaft. The axis of the rotating shaft is collinear with the axis of the inner drum, and the inner drum and the rotating shaft rotate synchronously. When the inner drum rotates, the outer drum 200 does not rotate with the inner drum.

[0053] When the washing machine is running the spin cycle, the inner drum rotates at high speed. The clothes inside the inner drum cause it to become eccentric during rotation, which in turn causes the rotating shaft to rotate eccentrically. This eccentric rotation of the rotating shaft causes the outer drum 200 to vibrate. When the degree of eccentricity of the inner drum during rotation is large, the amplitude of the vibration of the outer drum 200 also increases.

[0054] The washing machine may also include a control board that is electrically connected to the motor. The control board is used to obtain the current of the motor and determine the degree of eccentricity of the inner drum when it rotates based on the current.

[0055] A vibration sensor can be installed on the outer cylinder 200. The vibration sensor is used to detect the vibration amplitude of the outer cylinder 200. The vibration sensor is electrically connected to the control board, which is also used to acquire the vibration amplitude of the outer cylinder 200. The vibration amplitude of the outer cylinder 200 is positively correlated with the degree of eccentricity when the inner cylinder rotates. When the degree of eccentricity when the inner cylinder rotates is large, the vibration amplitude of the outer cylinder 200 also increases.

[0056] The vibration damper 100 is disposed between the outer cylinder 200 and the housing, and includes a friction cylinder 110, a support cylinder 120, a friction assembly 130, and a pressure regulating mechanism 140. Figure 1 and Figure 2 As shown, both the friction cylinder 110 and the support cylinder 120 can be cylindrical, with the radius of the support cylinder 120 being smaller than the radius of the friction cylinder 110. A portion of the support cylinder 120 is inserted inside the friction cylinder 110. For example... Figure 3 As shown, a movable hole 121 is provided on the wall of the support cylinder 120. The axis of the movable hole 121 can be perpendicular to the axis of the support cylinder 120, and the movable hole 121 is directly opposite to the friction cylinder 110.

[0057] The projection of the movable hole 121 onto the friction cylinder 110 can be circular, square, or rectangular, etc., and this embodiment does not limit the shape of the movable hole 121. The support cylinder 120 can have a fixed end and a movable end, with the movable end located inside the friction cylinder 110 and the fixed end located outside the friction cylinder 110. The movable hole 121 can be located close to the movable end to prevent it from moving outside the friction cylinder 110 when the vibration amplitude of the outer cylinder 200 is large. The friction assembly 130 is movably inserted into the movable hole 121 and can move along the axis of the movable hole 121.

[0058] Continue to refer to Figure 2 The pressure regulating mechanism 140 is installed inside the support cylinder 120. The pressure regulating mechanism 140 is used to adjust the preset pressure of the friction assembly 130 on the friction cylinder 110 according to the vibration amplitude of the outer cylinder 200.

[0059] The pressure regulating mechanism 140 is electrically connected to the control board. The control board controls the pressure regulating mechanism 140 according to the eccentricity of the inner cylinder during rotation and / or the vibration amplitude of the outer cylinder 200. When the vibration amplitude of the outer cylinder 200 is large, the preset pressure of the friction component 130 on the friction cylinder 110 is increased to increase the friction between the friction component 130 and the friction cylinder 110; while when the vibration amplitude of the outer cylinder 200 is small, the preset pressure of the friction component 130 on the friction cylinder 110 is decreased to reduce the friction between the friction component 130 and the friction cylinder 110. In this way, the damping force of the vibration damper 100 can be changed according to the vibration amplitude of the outer cylinder 200. When the vibration amplitude of the outer cylinder 200 is large, the vibration damper 100 provides a larger damping force to effectively reduce the vibration amplitude of the outer cylinder 200; when the vibration amplitude of the outer cylinder 200 is small, the vibration damper 100 provides a smaller damping force to reduce the noise generated by the large friction between the friction component 130 and the friction cylinder 110.

[0060] like Figure 4 As shown, the end of the friction cylinder 110 away from the support cylinder 120 can be hinged to the outer cylinder 200, and the end of the support cylinder 120 away from the friction cylinder 110 can be hinged to the inner wall of the housing. For example, a first connecting plate 201 can be provided on the side wall of the outer cylinder 200, the first connecting plate 201 being perpendicular to the axis of the outer cylinder 200, and a first connecting hole provided on the first connecting plate 201. A second connecting plate 111 can be provided on the end of the friction cylinder 110 away from the support cylinder 120, the second connecting plate 111 being parallel to the axis of the friction cylinder 110, and a second connecting hole provided on the second connecting plate 111. A first hinge post 202 passes through the first connecting hole and the second connecting hole.

[0061] A third connecting plate 123 may be provided at the end of the support cylinder 120 away from the friction cylinder 110. The third connecting plate 123 is parallel to the axis of the support cylinder 120 and has a third connecting hole. A fixing plate 301 may be provided on the inner side of the housing. The fixing plate 301 may have a fixing hole 302, through which fastening bolts pass and connect to the housing. A fourth connecting plate 303 may be provided on the side of the fixing plate 301 away from the housing. The fourth connecting plate 303 is perpendicular to the fixing plate 301 and has a fourth connecting hole. The second hinge post 304 passes through the third and fourth connecting holes.

[0062] Of course, the end of the support cylinder 120 away from the friction cylinder 110 can also be hinged to the outer cylinder 200, and the end of the friction cylinder 110 away from the support cylinder 120 can be hinged to the inner wall of the box.

[0063] Continue to refer to Figure 4In this embodiment, the washing machine can be a drum washing machine. The axis of the outer drum 200 is parallel to the horizontal plane. The casing can include a top plate and a bottom plate, with the top plate located above the bottom plate. Both the top and bottom plates are parallel to the horizontal plane. A mounting plate 305 can be provided at the bottom of the top plate. The side of the outer drum 200 facing the top plate can be connected to the mounting plate 305 via a buffer spring 306. Specifically, a fifth connecting plate 203 can be provided on the side of the outer drum 200 facing the top plate. The fifth connecting plate 203 is perpendicular to the axis of the outer drum 200. A fifth connecting hole 204 can be provided on the fifth connecting plate 203. The bottom end of the buffer spring 306 has a first hook 307, which passes through the fifth connecting hole 204. The top end of the buffer spring 306 has a second hook 308, which is hooked onto the mounting plate 305. A shock absorber 100 can be provided on the side of the outer drum 200 facing the bottom plate, and a fixing plate 301 is connected to the bottom plate.

[0064] Multiple buffer springs 306 can be provided above the outer cylinder 200. For example, two buffer springs 306 can be provided. The two buffer springs 306 can be symmetrical about a plane that passes through the axis of the outer cylinder 200 and extends in the vertical direction to maintain the balance of the outer cylinder 200.

[0065] Multiple shock absorbers 100 can be provided below the outer cylinder 200. For example, two shock absorbers 100 can be provided. The two shock absorbers 100 can be symmetrical about a plane that passes through the axis of the outer cylinder 200 and extends in the vertical direction to maintain the balance of the outer cylinder 200.

[0066] The vibration damper 100 can be installed at an angle relative to the horizontal plane, and the end of the vibration damper 100 closer to the outer cylinder 200 is closer to the plane that passes through the axis of the outer cylinder 200 and extends in the vertical direction than the end farther away from the outer cylinder.

[0067] like Figure 5 As shown, the friction assembly 130 may include a support block 131, a stop plate 132, and a friction plate 133. The support block 131 is movably inserted into the movable hole 121. The stop plate 132 is disposed on the side of the support block 131 facing the friction cylinder 110, and the stop plate 132 is located outside the support cylinder 120. The projection of the movable hole 121 on the stop plate 132 is located inside the stop plate 132. The stop plate 132 is used to fit against the support cylinder 120 to prevent the support block 131 from moving out of the movable hole 121.

[0068] like Figure 6 As shown, the friction plate 133 is disposed on the side of the stop plate 132 facing the friction cylinder 110, the friction plate 133 is in contact with the stop plate 132, and the friction plate 133 is used to contact the inner wall of the friction cylinder 110.

[0069] In the implementation where the projection of the movable hole 121 onto the friction cylinder 110 is a square, the projections of the stop plate 132 and the friction plate 133 onto the friction cylinder 110 can both be squares. The side of the stop plate 132 facing the support block 131 can fit against the cylinder wall of the support cylinder 120 to limit the support block 131 and prevent it from moving further toward the axis of the support cylinder 120 and moving out of the movable hole 121. The side of the friction plate 133 facing the stop plate 132 can fit against the stop plate 132, and the side of the friction plate 133 away from the stop plate 132 is used to fit against the inner side of the friction cylinder 110.

[0070] Continue to refer to Figure 3 Furthermore, there can be multiple movable holes 121, which are spaced apart along the circumference of the support cylinder 120; correspondingly, there are also multiple friction components 130, each friction component 130 passing through a corresponding movable hole 121.

[0071] like Figure 7 As shown, a connecting channel 134 can be provided on the support block 131. The axis of the connecting channel 134 is an arc. The distance between each point on the axis of the connecting channel 134 and the axis of the support cylinder 120 is equal. The distance between the connecting channel 134 on multiple support blocks 131 and the axis of the support cylinder 120 is also equal.

[0072] The friction assembly 130 may also include a first reset member, which is disposed within a plurality of connecting channels 134. The two ends of the first reset member are connected in the extending direction. The first reset member is elastic. The first reset assembly is used to move the support block 131 away from the friction cylinder 110. After the external force of the pressure regulating mechanism 140 on the friction assembly 130 is released, the first reset member moves the support block 131 toward the axis of the support cylinder 120 so that the friction plate 133 is separated from the friction cylinder 110 and the stop plate 132 abuts against the cylinder wall of the support cylinder 120. At this time, the friction assembly 130 is reset to the initial state.

[0073] Continue to refer to Figure 7 The aforementioned first reset component may include a first reset spring 135, which passes through multiple connecting channels 134. Multiple support blocks 131 are connected together by the first reset spring 135. The structure is simple and easy to implement.

[0074] Alternatively, the first reset component may also include a rubber band, which is threaded through multiple connecting channels 134, and can also connect multiple support blocks 131 together. After the external force of the pressure adjustment mechanism 140 on the friction component 130 is released, the friction component 130 can be reset to its initial state.

[0075] Continue to refer to Figure 2The pressure regulating mechanism 140 may include a movable block 141, a second reset member, and a traction device 143. The axis of the movable block 141 is collinear with the axis of the support cylinder 120. In the projection of the movable block 141 and the support block 131 onto a plane perpendicular to the axis of the support cylinder 120, the outer edge of the movable block 141 is farther away from the axis of the support cylinder 120 than the inner edge of the support block 131.

[0076] The second reset member is disposed at one end of the axial direction of the moving block 141, and the traction device 143 is disposed at the other end of the axial direction of the moving block 141. The traction device 143 is used to apply a pulling force to the moving block 141 in a direction away from the second reset member, so that the moving block 141 applies pressure to the support block 131 toward the friction cylinder 110; the second reset member is used to apply a pulling force to the moving block 141 in a direction away from the traction device 143, so as to release the pressure of the moving block 141 on the support block 131.

[0077] When the vibration amplitude of the outer cylinder 200 is different, the pulling force applied by the traction device 143 to the moving block 141 is different. When the vibration amplitude of the outer cylinder 200 is large, the pulling force of the traction device 143 on the moving block 141 is large. During the process of the moving block 141 moving towards the traction device 143, the moving block 141 abuts against the support block 131 and pushes the support block 131 towards the friction cylinder 110 until the friction plate 133 abuts against and squeezes the friction cylinder 110. At this time, the pressure of the friction plate 133 on the friction cylinder 110 is large, so the friction between the friction plate 133 and the friction cylinder 110 is also large. The vibration damper 100 can provide a large damping force to reduce the vibration of the outer cylinder 200. When the vibration amplitude of the outer cylinder 200 is small, the pressure of the friction plate 133 on the friction cylinder 110 is small, and the friction between the friction plate 133 and the friction cylinder 110 is also small. This can reduce the vibration amplitude of the outer cylinder 200 and reduce the noise caused by the large friction between the friction plate 133 and the friction cylinder 110.

[0078] Continue to refer to Figure 2 The aforementioned movable block 141 can be frustum-shaped. The area of ​​the bottom surface of the movable block 141 facing the traction device 143 is smaller than the area of ​​the bottom surface of the movable block 141 facing the second reset member. The support block 131 has an abutment surface 136 on the side away from the friction cylinder 110. The abutment surface 136 is used to fit against the side of the movable block 141. That is, in the cross section through the axis of the support cylinder 120, the abutment surface 136 is parallel to the side wall of the movable block 141. In this way, during the movement of the movable block 141 along the axis of the support cylinder 120, it can be ensured that the abutment surface 136 always fits against the side wall of the movable block 141.

[0079] Of course, in some other implementations, the movable block 141 can also be frustum-shaped, with multiple sides. Correspondingly, the abutment surface 136 can also be a slope, with each abutment surface 136 used to fit against the side of a corresponding movable block 141.

[0080] Continue to refer to Figure 2 In some embodiments, the second reset member may include a second reset spring 142, one end of the second reset spring 142 extending in the direction of connection to the end of the moving block 141 away from the traction device 143, and the other end of the second reset spring 142 extending in the direction of connection to the end of the support cylinder 120.

[0081] After the traction device 143 releases the tension on the moving block 141, the second return spring 142 pulls the moving block 141 away from the traction device 143, so that the moving block 141 moves toward the second return spring 142 to the initial position. When the moving block 141 is in the initial position, there is no force between the moving block 141 and the support block 131.

[0082] The second return spring 142 can be located at the movable end of the support cylinder 120, and the traction device 143 can be located at the fixed end of the support cylinder 120. Alternatively, the second return spring 142 can be located at the fixed end of the support cylinder 120, and the traction device 143 can be located at the movable end of the support cylinder 120.

[0083] In other embodiments, the second reset member may also include an elastic band, one end of which is connected to the end of the moving block 141 away from the traction device 143, and the other end of which may be connected to the movable end of the support cylinder 120.

[0084] Continue to refer to Figure 2 In some embodiments, a limiting tube 122 is provided on the inner side of the end of the support cylinder 120 away from the traction device 143. The axis of the limiting tube 122 is collinear with the axis of the support cylinder 120. The second return spring 142 passes through the limiting tube 122. The distance between the end of the limiting tube 122 facing the moving block 141 and the support block 131 is less than the axial height of the moving block 141. After the external force of the traction device 143 on the moving block 141 is released, the second return spring 142 pulls the moving block 141 until the moving block 141 abuts against the limiting tube 122. At this point, the end of the moving block 141 facing the traction motor 144 is still located within the space enclosed by the support block 131, so as to prevent the moving block 141 from completely detaching from the support block 131.

[0085] The aforementioned traction device 143 may include a traction motor 144 and a traction rope 145. The traction rope 145 may be a nylon rope, a rubber rope, or other flexible rope. One end of the traction rope 145 is connected to the end of the moving block 141 that is away from the second reset member, and the other end of the traction rope 145 is connected to the traction motor 144. The traction motor 144 is used to move the moving block 141 away from the second reset member.

[0086] The traction motor 144 can be electrically connected to the control board. The control board controls the traction motor 144 according to the vibration amplitude of the outer cylinder 200 to adjust the tension of the traction motor 144 on the traction rope 145.

[0087] In other embodiments, the traction device 143 may also include an electric push rod or other device that can drive the moving block 141 to move along the axis of the support cylinder 120.

[0088] In summary, the washing machine of this embodiment includes an outer drum 200, a cabinet, and a shock absorber 100. One end of the shock absorber 100 is hinged to the outer drum 200, and the other end of the shock absorber 100 is hinged to the cabinet. The shock absorber 100 includes a friction cylinder 110, a support cylinder 120, a friction assembly 130, and a pressure regulating mechanism 140. The support cylinder 120 is provided with a movable hole 121, and the friction assembly 130 passes through the movable hole 121. The pressure regulating mechanism 140 is disposed in the support cylinder 120. The pressure regulating mechanism 140 is used to apply pressure to the friction assembly 130 toward the friction cylinder 110 so that the friction assembly 130 abuts against the friction cylinder 110 and applies a preset pressure to the friction cylinder 110. With the above settings, when the vibration amplitude of the outer cylinder 200 is large, the preset pressure of the friction component 130 on the friction cylinder 110 is increased to increase the friction between the friction component 130 and the friction cylinder 110; while when the vibration amplitude of the outer cylinder 200 is small, the preset pressure of the friction component 130 on the friction cylinder 110 is decreased to reduce the friction between the friction component 130 and the friction cylinder 110. In this way, the damping force of the vibration damper 100 can be changed according to the vibration amplitude of the outer cylinder 200. When the vibration amplitude of the outer cylinder 200 is large, the vibration damper 100 provides a larger damping force to effectively reduce the vibration of the outer cylinder 200; when the vibration amplitude of the outer cylinder 200 is small, the vibration damper 100 provides a smaller damping force, which can reduce the vibration amplitude of the outer cylinder 200 and also reduce the noise generated by the large friction between the friction component 130 and the friction cylinder 110.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vibration damper, characterized in that, include: The friction cylinder, support cylinder, friction assembly, and pressure regulating mechanism are provided. Part of the support cylinder is inserted inside the friction cylinder. The support cylinder has a movable hole on its wall, which is directly opposite to the friction cylinder. The support cylinder has a fixed end and a movable end. The movable end is located inside the friction cylinder, and the fixed end is located outside the friction cylinder. The movable hole is located close to the movable end. The friction assembly passes through the movable hole and can move along the axis of the movable hole; The pressure regulating mechanism is disposed on the support cylinder and is connected to the friction assembly. The pressure regulating mechanism is used to adjust the preset pressure of the friction assembly on the friction cylinder according to the vibration amplitude of the outer cylinder. The friction assembly includes a support block, a stop plate, and a friction plate. The stop plate is disposed on the side of the support block facing the friction cylinder, and the stop plate is located outside the support cylinder. The projection of the movable hole on the stop plate is located inside the stop plate. The pressure regulating mechanism includes a moving block, a second reset member, and a traction device. The second reset member is disposed at one end of the moving block along the axial direction. The second reset member is used to apply a pulling force to the moving block in a direction away from the traction device to release the pressure of the moving block on the support block. The second reset member includes a second reset spring. A limiting tube is provided on the inner side of the end of the support cylinder away from the traction device. The axis of the limiting tube is collinear with the axis of the support cylinder. The second reset spring passes through the limiting tube. The distance between the end of the limiting tube facing the moving block and the support block is less than the axial height of the moving block.

2. The vibration damper according to claim 1, characterized in that, The support block is movably inserted into the movable hole, and the friction plate is disposed on the side of the stop plate facing the friction cylinder, with the friction plate in contact with the stop plate.

3. The vibration damper according to claim 2, characterized in that, There are multiple movable holes, which are spaced apart along the circumference of the support cylinder; there are multiple friction components, each of which passes through a corresponding movable hole. The support block is provided with a connecting channel, the axis of the connecting channel is an arc, and the distance between each point on the axis of the connecting channel and the axis of the support cylinder is equal, and the distance between the connecting channel on multiple support blocks and the axis of the support cylinder is equal; The friction assembly further includes a first reset member, which is disposed within the plurality of connection channels. The two ends of the first reset member are connected in the extending direction. The first reset member is used to move the support block away from the friction cylinder.

4. The vibration damper according to claim 3, characterized in that, The first reset element includes a first reset spring.

5. The vibration damper according to claim 3 or 4, characterized in that, The axis of the moving block is collinear with the axis of the support cylinder. The traction device is located at the other end of the axial direction of the moving block. The traction device is used to apply a pulling force to the moving block in a direction away from the second reset member, so that the moving block applies pressure to the support block toward the friction cylinder.

6. The vibration damper according to claim 5, characterized in that, The movable block is frustum-shaped, and the area of ​​the bottom surface of the movable block facing the traction device is smaller than the area of ​​the bottom surface of the movable block facing the second reset member; The support block has an abutment surface on the side opposite to the friction cylinder, and the abutment surface is used to fit against the side of the moving block.

7. The vibration damper according to claim 5, characterized in that, One end of the second return spring in the extension direction is connected to the end of the moving block away from the traction device, and the other end of the second return spring in the extension direction is connected to the end of the support cylinder.

8. The vibration damper according to claim 5, characterized in that, The traction device includes a traction motor and a traction rope. One end of the traction rope is connected to the end of the moving block away from the second reset member, and the other end of the traction rope is connected to the traction motor. The traction motor is used to move the moving block away from the second reset member.

9. A washing machine, characterized in that, include: The outer cylinder, the housing, and the vibration damper according to any one of claims 1-8, wherein one end of the vibration damper is hinged to the outer cylinder, and the other end of the vibration damper is hinged to the housing.

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