Combined bidirectional damping mechanism and pulsator washing machine damping device

Abstract

The utility model discloses a combined two -way damping mechanism and pulsator washing machine damping device, this combined two -way damping mechanism includes outer frame, negative stiffness subassembly, and outer frame includes middle connecting plate and left, right side support plate, and negative stiffness subassembly includes left side permanent magnet, middle permanent magnet, right side permanent magnet, and left, right side permanent magnet is respectively installed on corresponding side support plate upper end portion, and the movable pivot, upper mass block, lower mass block are installed between left, right side support plate, and the spiral groove of movable pivot is inserted into the protruding block of upper mass block, and the rack of lower mass block is engaged with the gear of movable pivot, and the lower mass block is slidably installed in the upper end portion of upper mass block, and the gear of movable pivot is engaged with the rack of lower mass block, and this pulsator washing machine damping device includes above -mentioned combined two -way damping mechanism. The combined two -way damping mechanism and pulsator washing machine damping device structure design novel, and the damping effect is good.

Description

Technical Field

[0001] This utility model relates to the field of vibration reduction device technology, and in particular to a combined bidirectional vibration reduction mechanism and a vibration reduction device for a pulsator washing machine. Background Technology

[0002] In recent years, with the improvement of economic level and quality of life, washing machines have become an essential household appliance. As consumers have increasingly higher requirements for washing machines, their demands are no longer limited to basic functions, but are becoming more stringent in terms of appearance design, performance, and operational comfort. Among these, the noise and vibration issues of pulsator washing machines have become a focus of industry attention; therefore, effectively reducing the vibration and noise of pulsator washing machines is an important direction for enhancing their market competitiveness.

[0003] Top-loading washing machines generally use a suspension rod vibration damping structure for vibration reduction. The outer tub of a top-loading washing machine is not rigidly connected to the casing; the connection is only achieved through the suspension rod vibration damping structure. One end of the structure connects to the casing, and the other end connects to the outer tub. Springs are installed on the suspension rods of this structure. Even with this traditional suspension rod vibration damping structure, under conditions such as full-load spin-drying, a significant amount of vibration is still transmitted to the casing and spreads to the surrounding environment, affecting daily life. Therefore, it is necessary to further reduce vibration in the casing of top-loading washing machines.

[0004] It should be noted that Chinese utility model patent with publication number CN221990831U discloses a negative stiffness device. Specifically, the negative stiffness device includes a frame body, with a first permanent magnet and a second permanent magnet fixedly arranged on opposite sides of the inner side of the frame body, and a third permanent magnet arranged between the first and second permanent magnets. The third permanent magnet is attracted to both the first and second permanent magnets. A first connecting mechanism is connected to the side of the frame body with the first permanent magnet, and a second connecting mechanism is provided on the side of the frame body with the second permanent magnet. The second connecting mechanism extends into the interior of the frame body and connects to the third permanent magnet. The second connecting mechanism can drive the third permanent magnet to move closer to or away from the first and second permanent magnets.

[0005] For the aforementioned negative stiffness device, when the second connecting mechanism deviates from the equilibrium position, the first permanent magnet and the second permanent magnet attract the third permanent magnet respectively. At this time, the second connecting mechanism connecting the third permanent magnet forms negative stiffness to achieve negative stiffness vibration reduction.

[0006] However, the aforementioned negative stiffness device can only achieve unidirectional negative stiffness vibration reduction, and cannot achieve bidirectional negative stiffness vibration reduction, resulting in poor vibration reduction effect. Utility Model Content

[0007] The purpose of this utility model is to provide a combined bidirectional vibration damping mechanism to address the shortcomings of existing technologies. This combined bidirectional vibration damping mechanism has a novel structural design and good vibration damping effect.

[0008] Another objective of this invention is to provide a vibration damping device for a pulsator washing machine that addresses the shortcomings of existing technologies. This device features a novel structural design, excellent vibration damping effect, and the ability to effectively absorb vibration energy during the operation of the pulsator washing machine and reduce noise.

[0009] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0010] A combined bidirectional vibration damping mechanism includes an outer frame and a negative stiffness component. The outer frame includes a middle connecting plate, a left support plate, and a right support plate. The left support plate and the right support plate are arranged opposite each other and spaced apart. The left support plate and the right support plate are respectively connected to the middle connecting plate. The negative stiffness component includes a left permanent magnet, a middle permanent magnet, and a right permanent magnet that are spaced apart from left to right and horizontally aligned. The left permanent magnet is installed at the upper end of the left support plate, and the right permanent magnet is installed at the upper end of the right support plate. The left permanent magnet and the right permanent magnet are magnetically attracted to the middle permanent magnet. A movable shaft, an upper mass block, and a lower mass block are installed between the left and right support plates. The left and right ends of the movable shaft are rotatably mounted on the left and right support plates on the corresponding sides via bearings. A spring is installed between the left end of the movable shaft and the left support plate, and between the right end of the movable shaft and the right support plate. The intermediate permanent magnet is installed at the upper end of the upper mass block. The upper mass block has a through hole that runs from left to right corresponding to the movable shaft. The movable shaft passes through the through hole of the upper mass block. The upper mass block has a protrusion on the inner wall of the through hole. The circumference of the movable shaft has a spiral groove that extends in a spiral direction corresponding to the protrusion. The protrusion of the upper mass block extends into the spiral groove of the movable shaft. The lower mass block is slidably mounted on the lower end of the upper mass block. Gears are fastened to the left and right ends of the movable shaft. Racks are mounted on the upper surface of the lower mass block corresponding to each gear, and each rack meshes with the corresponding gear.

[0011] The upper mass block has a T-shaped portion extending in the front-back direction at its lower end, and the lower mass block has a T-shaped groove extending in the front-back direction on its upper surface. The T-shaped portion of the upper mass block is slidably fitted into the T-shaped groove of the lower mass block.

[0012] A guide shaft is also installed between the left support plate and the right support plate, and the left end and the right end of the guide shaft are respectively connected to the left support plate and the right support plate on the corresponding side. The upper mass block has a guide hole that runs through it from left to right, and the guide shaft passes through the guide hole of the upper mass block.

[0013] The rack has upwardly protruding limiting protrusions at its front and rear ends.

[0014] The left support plate is welded or screwed to the left end of the middle connecting plate, and the right support plate is welded or screwed to the right end of the middle connecting plate.

[0015] Each of the gears is welded and fixed to the movable rotating shaft.

[0016] The length of the gear is less than 30% of the total length of the movable shaft.

[0017] The gear in question is a helical gear.

[0018] The helix angle of the gear is 30 degrees.

[0019] A vibration damping device for a pulsator washing machine includes the aforementioned combined bidirectional vibration damping mechanism, wherein the intermediate connecting plate of the combined bidirectional vibration damping mechanism is connected to the casing of the pulsator washing machine.

[0020] Compared with existing technologies, this utility model has the following advantages: Specifically, when the combined bidirectional vibration damping mechanism of this utility model is working, it can achieve vibration reduction and energy dissipation through negative stiffness vibration damping in both front-to-back horizontal vibration and left-to-right horizontal vibration conditions, thus achieving horizontal bidirectional vibration damping function. Furthermore, a spring-loaded mechanism can be used to reset the device to its equilibrium position. Compared with existing technologies, the combined bidirectional vibration damping mechanism of this utility model has the advantages of novel structural design and good vibration damping effect. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0022] Figure 1 This is a schematic diagram of the combined bidirectional vibration damping mechanism of this utility model.

[0023] Figure 2 This is a structural schematic diagram of the combined bidirectional vibration damping mechanism of this utility model from another perspective.

[0024] Figure 3 This is a structural schematic diagram of the combined bidirectional vibration reduction mechanism of this utility model from another perspective.

[0025] Figure 4 This is a schematic diagram of the upper mass block of this utility model.

[0026] exist Figures 1 to 4 This includes: 1-Outer frame; 11-Middle connecting plate; 12-Left side support plate; 13-Right side support plate; 21-Left side permanent magnet; 22-Middle permanent magnet; 23-Right side permanent magnet; 3-Movable rotating shaft; 31-Helical groove; 4-Upper mass block; 41-Rotating shaft through hole; 42-Protrusion; 43-T-shaped part; 44-Guide hole; 5-Lower mass block; 51-T-shaped groove; 6-Curled spring; 7-Gear; 8-Rack; 81-Limiting protrusion; 9-Guide shaft. Detailed Implementation

[0027] The present invention will now be described in conjunction with specific embodiments.

[0028] Example 1, as Figures 1 to 3 As shown, a combined bidirectional vibration damping mechanism includes an outer frame 1 and a negative stiffness component. The outer frame 1 includes a middle connecting plate 11, a left support plate 12, and a right support plate 13. The left support plate 12 and the right support plate 13 are arranged opposite each other and spaced apart. The left support plate 12 and the right support plate 13 are respectively connected to the middle connecting plate 11. It should be explained that the left support plate 12 is welded or screwed to the left end of the middle connecting plate 11, and the right support plate 13 is welded or screwed to the right end of the middle connecting plate 11.

[0029] Among them, such as Figures 1 to 3 As shown, the negative stiffness component includes a left permanent magnet 21, a middle permanent magnet 22, and a right permanent magnet 23 arranged horizontally and spaced apart from left to right. The left permanent magnet 21 is installed at the upper end of the left support plate 12, and the right permanent magnet 23 is installed at the upper end of the right support plate 13. The left permanent magnet 21 and the right permanent magnet 23 are magnetically attracted to the middle permanent magnet 22, respectively.

[0030] Furthermore, such as Figures 1 to 4 As shown, a movable shaft 3, an upper mass block 4, and a lower mass block 5 are installed between the left support plate 12 and the right support plate 13. The left and right ends of the movable shaft 3 are rotatably mounted on the corresponding left support plate 12 and right support plate 13 via bearings. A spring 6 is installed between the left end of the movable shaft 3 and the left support plate 12, and between the right end of the movable shaft 3 and the right support plate 13. For the spring 6 in this embodiment, it can be installed in the following way: the left and right ends of the movable shaft 3 each have a slotted structure. The inner end of the spring 6 is fixed in the slotted structure of the corresponding end of the movable shaft 3. The outer end of the spring 6 can be fastened to the corresponding support plate by welding or screwing.

[0031] Furthermore, such as Figures 1 to 4As shown, the intermediate permanent magnet 22 is installed at the upper end of the upper mass block 4. The upper mass block 4 has a through-hole 41 that runs from left to right corresponding to the movable shaft 3. The movable shaft 3 passes through the through-hole 41 of the upper mass block 4. The upper mass block 4 has a protrusion 42 on the inner wall of the through-hole 41. The circumferential surface of the movable shaft 3 has a spiral groove 31 that extends in a spiral direction corresponding to the protrusion 42. The protrusion 42 of the upper mass block 4 extends into the spiral groove 31 of the movable shaft 3.

[0032] In addition, such as Figures 1 to 3 As shown, the lower mass block 5 is slidably mounted on the lower end of the upper mass block 4. Gears 7 are fastened to the left and right ends of the movable shaft 3, respectively. Racks 8 are mounted on the upper surface of the lower mass block 5 corresponding to each gear 7, and each rack 8 meshes with the corresponding gear 7. It should be explained that each gear 7 can be welded and fixed to the movable shaft 3; of course, the above welding and fixing method does not constitute a limitation on this embodiment, that is, the gears 7 in this embodiment can also be fastened and installed on the periphery of the movable shaft 3 in other ways.

[0033] It should be noted that the combined bidirectional vibration damping mechanism of this embodiment can be applied to a pulsator washing machine. Specifically, the middle connecting plate 11 of the outer frame 1 is connected and installed on the cabinet of the pulsator washing machine.

[0034] The combined bidirectional vibration damping mechanism of Embodiment 1 will be described in detail below with reference to the specific working process: When the washing machine's casing vibrates left and right, the casing causes the outer frame 1 to vibrate synchronously left and right. At this time, the upper mass block 4 moves in the opposite direction relative to the outer frame 1, that is, the upper mass block 4 and the lower mass block 5 move left and right relative to the outer frame 1. During this process, the protrusion 42 of the upper mass block 4 slides along the spiral groove 31 of the movable shaft 3, thereby driving the movable shaft 3 to rotate. The rotating movable shaft 3 drives the rack 8 on the corresponding side through two gears 7, thereby causing the lower mass block 5 to slide back and forth relative to the upper mass block 4. During the movement, the middle permanent magnet 22 moves synchronously with the upper mass block 4. That is, the distance between the middle permanent magnet 22 and the left permanent magnet 21 and the distance between the middle permanent magnet 22 and the right permanent magnet 23 change respectively, which in turn causes the magnitude of the magnetic force between the permanent magnets to change, thereby generating negative stiffness and amplifying the displacement effect of the upper mass block 4 and the lower mass block 5. As the movable shaft 3 rotates, the positive stiffness generated by the compression of the spring 6 gradually cancels out the negative stiffness. When the generated positive stiffness is greater than the negative stiffness, the device is driven by the spring 6 to move towards the equilibrium position. When the washing machine cabinet is subjected to back-and-forth vibration, the cabinet drives the outer frame 1 to vibrate back and forth synchronously. At this time, the lower mass block 5 moves in the opposite direction relative to the outer frame 1, that is, the lower mass block 5 moves back and forth relative to the outer frame 1. During this process, the lower mass block 5 drives the rack 8 to move back and forth synchronously, and the rack 8, which moves back and forth, drives the movable shaft 3 to rotate through the gear 7. The rotating movable shaft 3 drives the upper mass block 4 to slide left and right through its spiral groove 31, thereby causing the distance between the middle permanent magnet 22 and the left permanent magnet 21 and the distance between the middle permanent magnet 22 and the right permanent magnet 23 to change respectively, which in turn causes the magnetic force between the permanent magnets to change, thereby generating negative stiffness and amplifying the displacement effect of the upper mass block 4 and the lower mass block 5. As the movable shaft 3 rotates, the positive stiffness generated by the compression of the spring 6 gradually cancels out the negative stiffness. When the generated positive stiffness is greater than the negative stiffness, the device is driven by the spring 6 to move towards the equilibrium position.

[0035] In summary, through the above structural design, the combined bidirectional vibration damping mechanism of Embodiment 1 can achieve vibration reduction and energy dissipation through negative stiffness damping in both front-to-back and left-to-right horizontal vibration situations. This means it can achieve bidirectional horizontal vibration damping, and the spring 6 can be used to reset the device to its equilibrium position. Compared to existing technologies, the combined bidirectional vibration damping mechanism of Embodiment 1 has the advantages of novel structural design and good vibration damping effect.

[0036] Example 2, as Figure 2 and Figure 3 As shown, the difference between this embodiment 2 and embodiment 1 is that: the lower end of the upper mass block 4 is provided with a T-shaped part 43 extending in the front-back direction, and the upper surface of the lower mass block 5 is provided with a T-shaped groove 51 extending in the front-back direction. The T-shaped part 43 of the upper mass block 4 is slidably embedded in the T-shaped groove 51 of the lower mass block 5.

[0037] Through the guide pair structure formed by the cooperation of the T-shaped part 43 and the T-shaped groove 51, this embodiment 2 can ensure that the lower mass block 5 can be stably and reliably slidably installed at the lower end of the upper mass block 4.

[0038] Example 3, as Figures 1 to 3 As shown, the difference between this embodiment 3 and embodiment 1 is that a guide shaft 9 is also installed between the left support plate 12 and the right support plate 13, and the left end and right end of the guide shaft 9 are respectively connected to the left support plate 12 and the right support plate 13 on the corresponding side.

[0039] The upper mass block 4 has a guide hole 44 that passes through the left and right sides, and the guide shaft 9 passes through the guide hole 44 of the upper mass block 4.

[0040] By cooperating with the guide shaft 9 and the guide hole 44, this embodiment 3 can ensure that the upper mass block 4 can be stably and reliably slidably installed between the left support plate 12 and the right support plate 13.

[0041] Example 4, as Figure 3 As shown, the difference between this embodiment four and embodiment one is that the front end and the rear end of the rack 8 are respectively provided with upwardly protruding limiting protrusions 81.

[0042] The limiting protrusions 81 located at the front and rear ends of the rack 8 serve to limit and block the movement of the lower mass block 5 relative to the upper mass block 4, thereby preventing the lower mass block 5 from detaching from the upper mass block 4. Specifically, when the lower mass block 5 slides forward relative to the upper mass block 4 to its limit position, the limiting protrusions 81 at the rear end of each rack 8 abut against the corresponding gear 7 to prevent the lower mass block 8 from detaching from the upper mass block 7. When the lower mass block 5 slides backward relative to the upper mass block 4 to its limit position, the limiting protrusions 81 at the front end of each rack 8 abut against the corresponding gear 7 to prevent the lower mass block 8 from detaching from the upper mass block 7.

[0043] Example 5 differs from Example 1 in that the length of gear 7 is less than 30% of the total length of movable shaft 3.

[0044] Example 6 differs from Example 1 in that gear 7 is a helical gear and the helix angle of gear 7 can be 30 degrees.

[0045] Example 7: A vibration damping device for a pulsator washing machine, comprising the above-mentioned combined bidirectional vibration damping mechanism, wherein the intermediate connecting plate 11 of the combined bidirectional vibration damping mechanism is connected to the casing of the pulsator washing machine.

[0046] Since the above-mentioned combined bidirectional vibration damping mechanism has the advantages of novel structural design and good vibration damping effect, the vibration damping device of the pulsator washing machine in this embodiment also has the advantages of novel structural design and good vibration damping effect, and can effectively absorb the vibration energy of the pulsator washing machine during operation and reduce noise.

[0047] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A combined bidirectional vibration damping mechanism, comprising an outer frame (1) and a negative stiffness component. The outer frame (1) includes a middle connecting plate (11), a left support plate (12), and a right support plate (13). The left support plate (12) and the right support plate (13) are arranged opposite each other and spaced apart. The left support plate (12) and the right support plate (13) are respectively connected to the middle connecting plate (11). The negative stiffness component includes a left permanent magnet (21), a middle permanent magnet (22) and a right permanent magnet (23) arranged horizontally and spaced apart from left to right. The left permanent magnet (21) is installed at the upper end of the left support plate (12) and the right permanent magnet (23) is installed at the upper end of the right support plate (13). The left permanent magnet (21) and the right permanent magnet (23) are magnetically attracted to the middle permanent magnet (22) respectively. Its features are: A movable shaft (3), an upper mass block (4), and a lower mass block (5) are installed between the left support plate (12) and the right support plate (13). The left and right ends of the movable shaft (3) are respectively mounted on the left support plate (12) and the right support plate (13) on the corresponding sides via bearings. A spring spring (6) is installed between the left end of the movable shaft (3) and the left support plate (12), and between the right end of the movable shaft (3) and the right support plate (13). The intermediate permanent magnet (22) is installed at the upper end of the upper mass block (4). The upper mass block (4) has a through-hole (41) that runs through the left and right sides of the movable shaft (3). The movable shaft (3) passes through the through-hole (41) of the upper mass block (4). The upper mass block (4) has a protrusion (42) on the inner wall of the through-hole (41). The circumferential surface of the movable shaft (3) has a spiral groove (31) that extends in a spiral direction corresponding to the protrusion (42). The protrusion (42) of the upper mass block (4) extends into the spiral groove (31) of the movable shaft (3). The lower mass block (5) is slidably mounted on the lower end of the upper mass block (4). The left and right ends of the movable shaft (3) are respectively fitted with gears (7). The upper surface of the lower mass block (5) is fitted with racks (8) corresponding to each gear (7). Each rack (8) meshes with the corresponding gear (7).

2. The combined bidirectional vibration damping mechanism according to claim 1, characterized in that: The lower end of the upper mass block (4) is provided with a T-shaped part (43) extending in the front-back direction, and the upper surface of the lower mass block (5) is provided with a T-shaped groove (51) extending in the front-back direction. The T-shaped part (43) of the upper mass block (4) is slidably embedded in the T-shaped groove (51) of the lower mass block (5).

3. The combined bidirectional vibration damping mechanism according to claim 1, characterized in that: A guide shaft (9) is also installed between the left support plate (12) and the right support plate (13). The left end and the right end of the guide shaft (9) are connected to the left support plate (12) and the right support plate (13) on the corresponding sides, respectively. The upper mass block (4) has a guide hole (44) that runs through the left and right sides corresponding to the guide shaft (9), and the guide shaft (9) passes through the guide hole (44) of the upper mass block (4).

4. The combined bidirectional vibration damping mechanism according to claim 1, characterized in that: The front and rear ends of the rack (8) are respectively provided with upwardly protruding limiting protrusions (81).

5. A combined bidirectional vibration damping mechanism according to claim 1, characterized in that: The left support plate (12) is welded or screwed to the left end of the middle connecting plate (11), and the right support plate (13) is welded or screwed to the right end of the middle connecting plate (11).

6. The combined bidirectional vibration damping mechanism according to claim 1, characterized in that: Each of the gears (7) is welded and fixed to the movable shaft (3).

7. The combined bidirectional vibration damping mechanism according to claim 1, characterized in that: The length of the gear (7) is less than 30% of the total length of the movable shaft (3).

8. The combined bidirectional vibration damping mechanism according to claim 1, characterized in that: The gear (7) is a helical gear.

9. A combined bidirectional vibration damping mechanism according to claim 8, characterized in that: The helix angle of the gear (7) is 30 degrees.

10. A vibration damping device for a pulsator washing machine, characterized in that, It includes a combined bidirectional vibration damping mechanism as described in any one of claims 1-9, wherein the intermediate connecting plate (11) of the combined bidirectional vibration damping mechanism is connected to the casing of the pulsator washing machine.

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