Tunable power absorber

Abstract

The application discloses a tunable dynamic vibration absorber and relates to the technical field of vibration absorbers. The tunable dynamic vibration absorber comprises a connecting assembly, a supporting assembly, a vibration absorbing assembly and a driving assembly, the connecting assembly is used for connecting a device to be vibrated, the supporting assembly comprises a supporting frame installed on the connecting assembly, the vibration absorbing assembly comprises a sliding piece, an elastic piece and a mass block, the elastic piece has opposite first and second ends, the first end is connected with the sliding piece, and the second end extends to one side of the supporting frame along a first direction and is connected with the mass block. The driving assembly can drive the sliding piece to move to adjust the effective working length of the elastic piece, and the inherent frequency of the whole vibration absorbing assembly can be adjusted in cooperation with the mass block, so that the on-line tuning of the vibration absorber is realized, the whole adjusting process does not need to be disassembled, the structure is simple, the occupied space is small, and the vibration absorbing demand of various devices can be adapted.

Description

Technical Field

[0001] This invention relates to the field of vibration absorber technology, and more particularly to an adjustable dynamic vibration absorber. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] Dynamic vibration absorbers are commonly used devices for suppressing structural resonance. Their principle is to construct an additional single-degree-of-freedom vibration system, causing the added mass to generate an inertial force opposite in phase to the vibration of the main structure, thus counteracting the external excitation on the main structure and reducing the vibration amplitude. Taking the widely used single-degree-of-freedom passive dynamic vibration absorber as an example, it includes rubber-damped vibration absorbers, spring-type single-degree-of-freedom vibration absorbers, and liquid-tuned vibration absorbers that are equivalent to a single-degree-of-freedom system.

[0004] As equipment develops towards higher speeds, variable operating conditions, and lighter weights, some existing vibration absorbers have been improved to make the absorption frequency adjustable in order to match the problems of speed fluctuations, load changes, and operating frequency drift in the equipment. However, the existing adjustable improvements still have obvious limitations. For example, tuning requires disassembly and assembly after the machine is stopped, resulting in low tuning efficiency. Moreover, there are problems such as complex adjustment structures, high costs, and large space occupation. Summary of the Invention

[0005] The purpose of this invention is to at least solve the problems of existing tunable vibration absorbers, such as the inability to adjust online, complex adjustment structures, high costs, and large space requirements. This purpose is achieved through the following technical solution: This invention proposes a tunable dynamic vibration absorber, comprising a connecting assembly, a supporting assembly, a vibration-absorbing assembly, and a driving assembly. The connecting assembly is used to connect the device to be absorbed. The supporting assembly includes a supporting frame mounted on the connecting assembly. The vibration-absorbing assembly includes a sliding member, an elastic member, and a mass block. The elastic member has opposite first and second ends. The first end is connected to the sliding member, and the second end extends out from one side of the supporting frame along a first direction and is connected to the mass block. The mass block is located outside the supporting frame along the first direction. The sliding member and the elastic member are respectively connected to the supporting frame in a sliding manner along the first direction. The portion between the sliding connection position of the elastic member and the supporting frame and the second end defines the effective working length of the elastic member. The effective working length, together with the mass block, defines the tuning natural frequency of the vibration-absorbing assembly. The driving assembly is mounted on the connecting assembly or the supporting assembly and is located on the side of the supporting frame opposite to the second end. The driving assembly is connected to the sliding member and is used to drive the sliding member to move linearly along the first direction, which is the length direction of the elastic member.

[0006] By adopting the above technical solution, the effective working length of the elastic element can be adjusted by moving the sliding part through the drive component, and the natural frequency of the entire vibration absorption component can be adjusted in conjunction with the mass block, thereby realizing the online tuning of the vibration absorber. The entire adjustment process does not require disassembly and assembly after shutdown, which improves the tuning efficiency. Moreover, the structure is simple, occupies little space, and can adapt to the vibration absorption needs of various equipment.

[0007] In some embodiments of the present invention, the number of elastic elements is multiple, including two elastic elements arranged parallel to each other along a second direction, the mass block being located between the two elastic elements, at least a portion of the slider being located between the two elastic elements, and the second direction being perpendicular to the first direction.

[0008] By adopting the above technical solution and using a structure with parallel arrangement of dual elastic elements, the structural stability and stiffness of the entire vibration absorption assembly can be improved, the mass block can be better manufactured, the vibration smoothness can be improved, and thus the vibration absorption accuracy and operational reliability of the vibration absorption assembly can be improved.

[0009] In some embodiments of the present invention, the sliding member includes a main body and two sliding portions protruding from both sides of the main body along the second direction. The supporting frame includes a first frame and a second frame. The two first frames are arranged parallel to each other along the second direction. The second frame is connected to one end of each of the two first frames along the first direction. The length direction of the second frame is perpendicular to the length direction of the first frame. Along a third direction, the height of the first frame on the supporting frame is greater than the height of the second frame on the supporting frame. The third direction is perpendicular to both the first direction and the second direction. The two sliding portions slide in cooperation with the two first frames one by one. The two elastic members slide in cooperation with the second frame.

[0010] By adopting the above technical solution, the two sliding parts slide with the two first frame sides, and the two elastic elements slide with the second frame side, realizing multiple sliding connections between the vibration absorption component and the support frame, and the sliding positions do not interfere with each other; at the same time, the first and second frame sides of the support frame form a staggered structure, which improves the compactness of the structure and avoids the problem of sliding interference between the sliding parts and the second frame side.

[0011] In some embodiments of the present invention, the support frame is provided with a sliding groove, and the elastic element is slidably installed in the sliding groove.

[0012] By adopting the above technical solution, the sliding groove limits and guides the elastic element, so that the elastic element can only move along the length direction, avoiding unnecessary displacement in other directions.

[0013] In some embodiments of the present invention, the support assembly further includes two limiting wheels, which are located on both sides of the slide groove along the second direction, and the elastic element is clamped between the two limiting wheels.

[0014] By adopting the above technical solution, the two limiting wheels can laterally clamp and limit the elastic element, further constrain the swing deviation of the elastic element, reduce the friction and deformation deviation during the movement of the elastic element, and ensure the stability of frequency tuning.

[0015] In some embodiments of the present invention, at least one of the two limiting wheels is configured to be adjustable along the second direction to adjust the spacing between the limiting wheels.

[0016] By adopting the above technical solution, the installation and use requirements of elastic components of different sizes can be matched by adjusting the spacing of the limit wheels, thereby improving the versatility and assembly adaptability of the vibration absorber.

[0017] In some embodiments of the present invention, the connecting assembly includes a connecting suction cup, a first connecting block, and a second connecting block. The connecting suction cup is installed at the bottom of the first connecting block. The first connecting block has an air suction chamber and a communication port. The air suction chamber communicates with the communication port and the connecting suction cup, respectively. The second connecting block is installed at the top of the first connecting block, and the support assembly is installed on the second connecting block.

[0018] By adopting the above technical solution, the negative pressure adsorption of the vibration damping device using the connecting suction cup can achieve rapid installation of the vibration absorber. The installation is convenient and versatile, and it will not damage the surface of the workpiece.

[0019] In some embodiments of the present invention, the connecting assembly further includes a support cover, which is installed on the bottom of the first connecting block and surrounds the connecting suction cup. The side of the support cover facing away from the first connecting block is used to abut against the device to be vibrated.

[0020] By adopting the above technical solution, the support cover can protect and support the suction cup, and the support cover can transmit vibration, thus avoiding the reduction of the vibration absorption performance of the vibration absorber due to the flexibility of the suction cup.

[0021] In some embodiments of the present invention, the connecting assembly further includes a negative pressure generator, which is connected to the communication port and is used to generate negative pressure on the connecting suction cup.

[0022] By adopting the above technical solution, a negative pressure is generated on the suction cup by a negative pressure generator, so that the suction cup can be firmly adsorbed and fixed on the equipment to be vibration damped, without damaging the surface of the workpiece.

[0023] In some embodiments of the present invention, the drive assembly includes a drive motor and a screw, the drive motor is mounted on a support frame, the output shaft of the drive motor is coaxially connected to the screw, the screw is threadedly connected to the slider, and the rotation of the screw is configured to drive the slider to move along the first direction.

[0024] By adopting the above technical solution, the linear motion of the sliding component is achieved by the cooperation of the drive motor and the screw. This not only has a simple structure and high transmission accuracy and smoothness, but also enables the micro-displacement adjustment of the sliding component, thereby achieving fine and continuous tuning of the vibration absorption frequency. Attached Figure Description

[0025] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1A schematic diagram of the tunable dynamic vibration absorber provided in an embodiment of the present invention from one perspective; Figure 2 A schematic diagram of the tunable dynamic vibration absorber provided in an embodiment of the present invention from another perspective; Figure 3 A schematic diagram of the tunable dynamic vibration absorber provided in an embodiment of the present invention from another perspective; Figure 4 An exploded view of the tunable dynamic vibration absorber provided in an embodiment of the present invention.

[0026] The attached figures are labeled as follows: 100. Adjustable dynamic vibration absorber; 10. Connecting component; 11. Connecting suction cup; 12. First connecting block; 121. Connecting port; 13. Second connecting block; 14. Support cover; 15. Sealing component; 20. Support component; 21. Support frame; 211. First side frame; 212. Second side frame; 2121. Slide groove; 2122. Mounting slot; 213. Third side frame; 2131. Notch; 22. Limiting component; 221. Limiting wheel; 222. Adjusting component; 30. Vibration-absorbing component; 31. Sliding component; 311. Main body; 312. Sliding part; 32. Elastic component; 321. First end; 322. Second end; 33. Mass block; 40. Drive assembly; 41. Drive motor; 411. Connecting lug; 42. Screw; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0027] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0028] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0029] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0030] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0031] As industrial equipment develops towards higher speeds, variable operating conditions, and lighter weights, motors, precision machining equipment, and vehicle-mounted instruments commonly experience problems such as speed fluctuations, load changes, and operating frequency drift. The limitations of traditional passive vibration absorbers are gradually becoming apparent. Existing research has also revealed a small number of adjustable vibration absorber structures, such as mechanically counterweight tuned vibration absorbers, current-variable damping vibration absorbers, and multi-degree-of-freedom adjustable vibration absorbers.

[0032] However, mechanically counterweighted vibration absorbers require manual addition or removal of counterweights and replacement of springs to change the natural frequency, necessitating shutdown and disassembly for adjustment, and cannot be adjusted online in real time. While current-routine damping vibration absorbers can achieve electronically controlled damping adjustment, they require a matching high-voltage drive power supply, have complex sealing structures, high component costs, and are difficult to miniaturize, making them unsuitable for micro-precision equipment. Multi-degree-of-freedom adjustable vibration absorbers require setting multiple sets of vibration pairs to broaden the damping frequency band, and the presence of degree-of-freedom coupling can introduce additional resonance peaks, making system modeling complex and also presenting the problem of insufficient installation space for small equipment.

[0033] In view of this, this embodiment provides a purely mechanical dynamic vibration absorber that can be tuned online without stopping the machine, in order to solve the above-mentioned technical problems.

[0034] The following is in conjunction with the appendix Figures 1 to 4 The structure and technical effects of the tunable dynamic vibration absorber 100 provided in this embodiment are introduced.

[0035] Combined with appendix Figures 1 to 3 As shown, this embodiment provides an adjustable dynamic vibration absorber 100, including functional components such as a connecting component 10, a support component 20, a vibration absorption component 30, and a driving component 40.

[0036] The connecting component 10 is used to connect the vibration-absorbing device. The vibration-absorbing device can be a motor housing, fan housing, gearbox housing, vehicle vibration component, or other equipment component that has a resonance suppression requirement. In some embodiments, the equipment component is a thin-walled part that has been machined.

[0037] There are various ways to connect the connecting component 10 to the device to be vibrated, such as a fixed connection or a detachable connection, or an adsorption connection via a suction cup as described below.

[0038] The support assembly 20 includes a support frame 21 mounted on the connecting assembly 10. The shape of the support frame 21 can be a rectangle as shown in the figure, or other shapes, which will not be listed in this embodiment. The function of the support frame 21 is to mount the vibration absorption assembly 30 and the driving assembly 40, and to provide space for their movement.

[0039] The vibration damping assembly 30 includes a sliding member 31, an elastic member 32, and a mass block 33. The elastic member 32 has a first end 321 and a second end 322 that are opposite to each other. The first end 321 is connected to the sliding member 31. The connection method can be a bolt connection or other connection methods, as long as the relative fixation of the two can be satisfied.

[0040] The mass block 33 is located on the outside of the support frame 21 along the first direction X, and the second end 322 extends out of the support frame 21 on one side along the first direction X and is connected to the mass block 33. The connection method can also be bolt connection or other fixed connection method.

[0041] In this embodiment, the sliding member 31 and the elastic member 32 are connected to the support frame 21 in a sliding manner along the first direction X. The section between the position where the elastic member 32 is slidably constrained by the support frame 21 and the second end 322 is the effective working length of the elastic member 32. That is, in this embodiment, only this section of the elastic member 32 can undergo elastic deformation.

[0042] The natural frequency of the dynamic vibration absorber is determined by the stiffness of the elastic element 32, its effective working length, and the mass of the mass block 33. With the weight of the mass block 33 remaining constant, changing the effective working length of the elastic element 32 alters its actual equivalent stiffness, thereby changing the natural frequency of the vibration-absorbing assembly 30.

[0043] In this embodiment, the drive component 40 is installed on the connecting component 10 or the support component 20. In this embodiment, it is installed on the support component 20 so that after the drive component 40 is fixed to the support frame 21, it can provide certain constraints on the vibration absorption component 30.

[0044] Specifically, the drive assembly 40 is installed on the side of the support frame 21 away from the second end 322. The drive assembly 40 passes through the support frame 21 and is connected to the slider 31. The drive assembly 40 is used to drive the slider 31 to move linearly along the first direction X, where the first direction X is the length direction of the elastic member 32.

[0045] The drive assembly 40 can be any linear reciprocating motion structure, such as a cylinder, hydraulic cylinder, ball screw, and threaded screw as described below.

[0046] When performing vibration absorption, the drive component 40 drives the slider 31 to move along the first direction X, and the slider 31 drives the first end 321 of the elastic component 32 to move synchronously, thereby changing the effective working length and realizing the continuous adjustment of the natural frequency of the vibration absorption component 30.

[0047] When the vibration absorber of this embodiment is installed on the equipment to be vibration-damped, the mass block 33 and the elastic element 32 constitute an additional vibration system when the equipment vibrates. When the natural frequency of the vibration absorber is adjusted to be close to or equal to the excitation frequency of the equipment, the mass block 33 generates an inertial force that is opposite to the phase of the equipment vibration. This inertial force counteracts the external excitation received by the main structure, thereby suppressing the resonance of the main structure, reducing the vibration amplitude of the main structure, and thus achieving the vibration absorption effect.

[0048] In this embodiment, the driving component 40 can drive the sliding member 31 to slide along the length direction of the elastic member 32, thereby changing the effective working length of the elastic member 32 relative to the support frame 21 in real time. Under the premise that the mass of the mass block 33 is constant, the change in the effective working length of the elastic member 32 can change the equivalent stiffness of the system, thereby continuously and accurately adjusting the natural vibration frequency of the vibration absorption component 30, so that the natural frequency of the vibration absorber can match the actual excitation frequency of the device to be absorbed in real time.

[0049] Compared to traditional tuning structures, this embodiment employs a purely mechanical sliding adjustment method, which not only enables online dynamic frequency tuning without the need for component disassembly, but also overcomes the shortcomings of traditional adjustable vibration absorbers that rely on disassembly for tuning and cannot adapt to changes in operating conditions in real time. Furthermore, the highly integrated adjustment drive assembly 40 and vibration absorption assembly 30 result in a compact overall layout, fewer components, a simpler structure, less installation space required, and lower manufacturing costs.

[0050] The vibration absorber in this embodiment can adapt to complex changing working conditions such as equipment speed fluctuations, load changes, and operating frequency drift, and always maintain the optimal vibration absorption effect, improving the vibration absorption capability under different working conditions, and has good versatility and adaptability.

[0051] In some embodiments, the number of elastic elements 32 is multiple, such as the two shown in the figure, and of course, there may be more. The two elastic elements 32 are arranged parallel to each other along the second direction Y, which is perpendicular to the first direction X. The first direction X in the figure is a horizontal direction, and the second direction Y is a vertical direction. Of course, this orientation is only for illustration in this embodiment and does not constitute a limitation on the scope of protection of the present invention. In the actual application of the vibration absorber, the specific orientation is adjusted according to the requirements.

[0052] The mass block 33 is located between two elastic members 32. One end of each elastic member 32 is connected to the side of the mass block 33 along the second direction Y by bolts or other connecting components. Of course, it can also be connected by welding or plugging.

[0053] Similarly, the sliding member 31 is also located between the two elastic members 32, and the other end of each elastic member 32 is connected to the side of the sliding member 31 along the second direction Y by connecting components such as bolts.

[0054] Compared to a single elastic element 32, this embodiment uses a structure with two elastic elements 32 arranged in parallel, which can significantly improve the structural stability and overall stiffness of the entire vibration absorption assembly 30, provide balanced support for the mass block 33, effectively suppress the deflection and tilting of the mass block 33 during vibration, improve the stability of the reciprocating vibration of the mass block 33, and thus improve the vibration absorption accuracy and operational reliability of the vibration absorption assembly 30.

[0055] This embodiment uses two elastic elements 32 as an example. In actual applications, the number of elastic elements 32 can also be set to three, four or more. Multiple sets of elastic elements 32 can further improve the system stiffness and load-bearing capacity, and adapt to the working conditions of larger mass blocks 33 and higher vibration loads.

[0056] Combined with appendix Figure 4 As shown, in some embodiments, the slider 31 includes a main body 311 and two sliding parts 312 protruding from both sides of the main body 311 along the second direction Y, so that the slider 31 forms a T-shaped structure. The main body 311 is used to connect with the elastic member 32, and the two sliding parts 312 are used to overlap on the support frame 21, so that the slider 31 can slide on the support frame 21.

[0057] Accordingly, the support frame 21 of this embodiment includes a first frame 211, a second frame 212 and a third frame 213. The two first frames 211 are arranged parallel to each other along the second direction Y. The second frame 212 is connected to one end of the two first frames 211 along the first direction X. The third frame 213 is connected to the other end of the two first frames 211 along the first direction X.

[0058] The second border 212 and the third border 213 are parallel, and their length directions are both perpendicular to the length direction of the first border 211. Along the third direction Z, the height of the first border 211 on the support frame 21 is greater than the height of the second border 212 on the support frame 21. The height of the first border 211 on the support frame 21 can be equal to the height of the third border 213 on the support frame 21, so that the entire support frame 21 forms a stepped structure at the second border 212.

[0059] Furthermore, the two sliding parts 312 are slidably engaged with the two first frame parts 211 one by one, and the two elastic members 32 are slidably engaged with the second frame parts 212 respectively.

[0060] Two sliding parts 312 slide with two first frame 211, and two elastic elements 32 slide with second frame 212, realizing multiple independent sliding engagement structures between the vibration absorption component 30 and the support frame 21. The guiding movement of the sliding element 31 and the telescopic movement of the elastic element 32 are arranged in separate zones, and they do not interfere with each other during the movement.

[0061] Meanwhile, the support frame 21 utilizes the first frame 211 and the second frame 212 to form a staggered stepped structure, making reasonable use of vertical space and greatly improving the overall structural compactness. This avoids friction, jamming, and motion interference between the sliding part 312 and the second frame 212 during the reciprocating sliding process from the structural source, ensuring smooth sliding of the sliding part 31 and precise and stable adjustment action, effectively improving the frequency tuning accuracy and long-term operational reliability of the device.

[0062] In some embodiments, the support frame 21 of this embodiment has a groove 2121, and the elastic element 32 is slidably installed in the groove 2121.

[0063] Specifically, the second frame 212 is provided with a sliding groove 2121, which is an open groove with openings at both ends along the first direction X. The width of the sliding groove 2121 is greater than or equal to the thickness of the elastic member 32. Taking two elastic members 32 as an example, there are two sliding grooves 2121, and the two elastic members 32 are inserted into the two sliding grooves 2121 one by one to achieve sliding engagement.

[0064] The sliding groove 2121 limits and guides the elastic element 32 to slide, so that the elastic element 32 can only move along the length direction, avoiding unnecessary displacement in other directions.

[0065] In some embodiments, the support component 20 further includes a limiting component 22, each limiting component 22 including two limiting wheels 221, the two limiting wheels 221 being located on both sides of the slide groove 2121 along the second direction Y, and used to clamp the elastic member 32.

[0066] Specifically, four limiting wheels 221 are provided for the two elastic elements 32, that is, two limiting wheels 221 are provided on both sides of the groove 2121 of each elastic element 32, and each elastic element 32 is clamped in the middle position by the two limiting wheels 221 on both sides of its groove 2121.

[0067] At this point, the width of the groove 2121 can be designed to be greater than the thickness of the elastic element 32, so that the groove 2121 only plays a preliminary limiting and guiding role for the elastic element 32, and the elastic element 32 does not directly contact the groove wall of the groove 2121. Utilizing the characteristic that the limiting wheel 221 can rotate freely, the elastic element 32 experiences rolling friction with the limiting wheel 221 during tuning sliding and vibration.

[0068] In this structural design, the slide 2121 only provides basic guidance and limiting. The side wall of the slide 2121 and the elastic member 32 do not have sliding friction. The rotatable limiting wheel 221 only relies on the rotatable limiting wheel 221 to laterally clamp and limit the elastic member 32 from both sides, thus constraining the lateral swing and displacement of the elastic member 32.

[0069] When the elastic element 32 moves, it drives the limit wheel 221 to rotate passively, converting sliding friction into rolling friction, which can significantly reduce motion resistance. This setting allows the slide groove 2121 to have an assembly clearance, reducing the difficulty of part processing and assembly, while ensuring that the elastic element 32 always moves straight along the first direction X, reducing deformation deviation, making the effective working length adjustment of the elastic element 32 more accurate, and improving the stability and tuning accuracy of frequency tuning.

[0070] In some embodiments, at least one of the two limiting wheels 221 is configured to be able to adjust along the second direction Y, so that the two limiting wheels 221 can move closer or further apart relative to each other along the second direction Y, so as to adjust the spacing of the limiting wheels 221 to match the installation and use requirements of elastic elements 32 of different sizes, and improve the versatility and assembly adaptability of the vibration absorber.

[0071] Taking the adjustable limiting wheel 221 located on the outermost side of the support frame 21 as an example, a mounting groove 2122 can be provided on one end of the second frame 212 along the second direction Y. The outermost limiting wheel 221 is mounted on the wall at the bottom of the mounting groove 2122 along the second direction Y by a spring, and can move in the mounting groove 2122 along the second direction Y.

[0072] An adjusting member 222 is provided on the top wall of the mounting groove 2122 along the second direction Y. The adjusting member 222 abuts against or is connected to the limiting wheel 221. The adjusting member 222 is configured to move along the second direction Y on the mounting groove 2122. The downward movement of the adjusting member 222 can drive the limiting wheel 221 to compress the spring, thereby making the outermost limiting wheel 221 approach its adjacent other limiting wheel 221.

[0073] When it is necessary to move the two limit wheels 221 away from each other, the adjusting member 222 moves upward. Under the reset action of the spring, it drives the limit wheel 221 in the mounting groove 2122 to move upward, thereby moving the limit wheel 221 in the mounting groove 2122 away from the inner limit wheel 221.

[0074] In this embodiment, the adjusting member 222 can be a bolt. In this case, the adjusting member 222 is threadedly connected to the top wall of the mounting groove 2122 along the second direction Y. By turning the adjusting member 222, linear movement of the adjusting member 222 can be achieved. Of course, the structure of the adjusting member 222 is not limited to this; for example, it can be any kind of linear reciprocating motion structure.

[0075] In some embodiments, the connecting component 10 includes a connecting suction cup 11, a first connecting block 12, and a second connecting block 13. The connecting suction cup 11 can be a rigid suction cup or a flexible suction cup. When the connecting suction cup 11 generates negative pressure inside, it can hold the device to be vibration damped, thereby realizing the connection between the connecting component 10 and the device to be vibration damped, without damaging the surface of the workpiece.

[0076] The connecting suction cup 11 is fixedly installed on the bottom surface of the first connecting block 12. In order to facilitate the negative pressure state of the connecting suction cup 11, the first connecting block 12 in this embodiment is provided with an air suction chamber (not shown in the figure). In addition, the outer surface of the first connecting block 12 is provided with a communication port 121, which can be sealed by the sealing member 15.

[0077] The suction chamber is connected to a suction cup and a connecting port 121 at its two ends. By connecting a negative pressure generating component and other structures at the connecting port 121, a negative pressure state of the suction cup can be achieved.

[0078] The second connecting block 13 is installed on top of the first connecting block 12, and its main function is to connect the support assembly 20 and the first connecting block 12. Specifically, the support assembly 20 is installed on the second connecting block 13 by bolts or other connecting components, so as to realize the installation of the support assembly 20 on the connecting assembly 10.

[0079] In this embodiment, the negative pressure adsorption of the vibration damping device is adopted by connecting suction cup 11, which can realize the rapid installation of the vibration absorber, which is convenient and widely applicable.

[0080] Of course, the structure of the connecting component 10 is not limited to this. Other structures that can be assembled with the vibration-absorbing device can also be used as the connecting component 10 in this embodiment, such as bolt connection component 10, snap-fit ​​connection component 10, etc. This embodiment will not list them in detail.

[0081] When the connecting suction cup 11 is a rigid suction cup, the vibration of the equipment can be transmitted to the vibration absorption component 30 through the connecting suction cup 11. However, when the connecting suction cup 11 itself has flexible and elastic characteristics, the suction cup will undergo elastic deformation during the transmission of equipment vibration. The vibration energy will be partially consumed by the elasticity of the connecting suction cup 11. The suction cup 11 dissipates energy through damping and reduces vibration in all modes, while the vibration absorber reduces vibration in specific modes, resulting in a stronger and more targeted vibration reduction effect.

[0082] In addition, the connecting component 10 of this embodiment is further provided with a rigid support cover 14. The support cover 14 is assembled at the bottom of the first connecting block 12 and surrounds the connecting suction cup 11. The end face of the support cover 14 facing away from the first connecting block 12 abuts against the surface of the device to be vibrated.

[0083] The rigid support cover 14 can limit and protect the connecting suction cup 11, and also transmit vibrations so that the vibrations are transmitted to the elastic element 32.

[0084] Moreover, the vibration of the device to be absorbed is mainly transmitted directly to the first connecting block 12 through the rigid support cover 14, and then input into the vibration absorption component 30, bypassing the vibration loss caused by the elastic deformation of the connecting suction cup 11, weakening the negative impact of the flexibility of the connecting suction cup 11 on vibration transmission, so that the vibration of the device to be absorbed can be completely transmitted to the vibration absorption component 30 for vibration reduction.

[0085] In some embodiments, the connecting assembly 10 further includes a negative pressure generator (not shown in the figure), which is connected to the communication port 121. The negative pressure generator is used to create a negative pressure inside the connecting suction cup 11, so that the connecting suction cup 11 can be firmly adsorbed and fixed to the surface of the device to be vibrated.

[0086] The negative pressure generator can be integrated with the vibration absorber as a whole, that is, the negative pressure generator is installed and fixed on the equipment to be absorbed along with the vibration absorber, and can continuously provide a negative pressure source for the connected suction cup 11 during operation.

[0087] Of course, the assembly form of the negative pressure generator is not limited to this. In other embodiments, the negative pressure generator and the communication port 121 on the first connecting block 12 are detachably connected. The negative pressure generator only connects to the communication port 121 during the negative pressure extraction operation. Alternatively, the negative pressure generator can be omitted, and the external negative pressure equipment can be used to connect to the communication port 121 to extract negative pressure inside the connecting suction cup 11.

[0088] For the two application scenarios of detachable external negative pressure generator or external negative pressure device, in addition to sealing with sealing component 15, an openable and closable one-way valve (not shown in the figure) can be configured at the connection port 121. This one-way valve only allows gas to flow out from inside the connecting suction cup 11 and prevents external gas from flowing back into the suction cup.

[0089] Once the connecting component 10 is attached to the surface of the device to be vibrated and the negative pressure operation is completed, the negative pressure generator or external negative pressure device can be removed. The one-way valve will automatically close to lock the air passage, preventing the backflow of external atmosphere into the connecting suction cup 11, so that the connecting suction cup 11 can maintain a negative pressure adsorption state for a long time.

[0090] In some embodiments, the drive assembly 40 includes a drive motor 41 and a screw 42. The drive motor 41 is mounted on the support frame 21. Specifically, a notch 2131 is provided in the middle of the third frame 213 of the support frame 21, and two connecting ears 411 are provided on the housing of the drive motor 41. The two connecting ears 411 are connected one by one to the parts on both sides of the notch 2131 of the third frame 213 by bolts or other components.

[0091] The notch 2131 not only forms a structure for docking the connecting lug 411, but also facilitates the passage of the motor's output shaft and the screw 42. The screw 42 is threadedly connected to the slider 31. Because the slider 31 in this embodiment is limited by the screw 42 and the two first frame edges 211 in the second direction Y and the third direction Z, the slider 31 cannot rotate with the screw 42 when it rotates, and can only move along the first direction X to achieve the tuning of the vibration absorber.

[0092] This structure utilizes the cooperation of the drive motor 41 and the screw 42 to achieve the linear motion of the sliding member 31. It is not only simple in structure and has high transmission accuracy and smoothness, but also enables the micro-displacement adjustment of the sliding member 31, thereby achieving fine and continuous tuning of the vibration absorption frequency.

[0093] Of course, the structure of the drive component 40 in this embodiment is not limited to this. Other linear reciprocating motion structures, such as cylinders, crank sliders, ball screws, etc., are also within the scope of this embodiment. This embodiment will not list them one by one.

[0094] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A tunable dynamic vibration absorber, characterized in that, include: Connection component (10) for connecting the device to be vibration absorbed; Support assembly (20) includes a support frame (21) mounted on the connection assembly (10); The vibration damping assembly (30) includes a slider (31), an elastic element (32), and a mass block (33). The elastic element (32) has a first end (321) and a second end (322) that are opposite to each other. The first end (321) is connected to the slider (31), and the second end (322) extends out of the support frame (21) along a first direction (X) and is connected to the mass block (33). The mass block (33) is located on the outside of the support frame (21) along the first direction (X). The slider (31) and the elastic element (32) are connected to the support frame (21) in a sliding manner along the first direction (X). The portion between the position where the elastic element (32) is slidably connected to the support frame (21) and the second end (322) defines the effective working length of the elastic element (32). The effective working length, together with the mass block (33), defines the tuning natural frequency of the vibration damping assembly (30). as well as A drive assembly (40) is installed on the connecting assembly (10) or the support assembly (20) and is located on the side of the support frame (21) away from the second end (322). The drive assembly (40) is connected to the slider (31) and is used to drive the slider (31) to move linearly along the first direction (X), where the first direction (X) is the length direction of the elastic member (32).

2. The tunable dynamic vibration absorber according to claim 1, characterized in that, The number of elastic elements (32) is multiple, and the multiple elastic elements (32) include two elastic elements (32) arranged parallel to each other along the second direction (Y). The mass block (33) is located between the two elastic elements (32), and at least a portion of the sliding member (31) is located between the two elastic elements (32). The second direction (Y) is perpendicular to the first direction (X).

3. The tunable dynamic vibration absorber according to claim 2, characterized in that, The sliding member (31) includes a main body (311) and two sliding parts (312) protruding from both sides of the main body (311) along the second direction (Y). The supporting frame (21) includes a first frame (211) and a second frame (212) arranged in a parallel interval along the second direction (Y). The second frame (212) is connected to one end of each of the two first frames (211) along the first direction (X). The length direction of the second frame (212) is perpendicular to the length direction of the first frame (211) along the third direction (Z). The height of the first frame (211) on the support frame (21) is greater than the height of the second frame (212) on the support frame (21). The third direction (Z) is perpendicular to the first direction (X) and the second direction (Y) respectively. The two sliding parts (312) are slidably engaged with the two first frames (211) one by one. The two elastic elements (32) are slidably engaged with the second frame (212).

4. The tunable dynamic vibration absorber according to claim 3, characterized in that, The support frame (21) has a groove (2121), and the elastic element (32) is slidably installed in the groove (2121).

5. The tunable dynamic vibration absorber according to claim 4, characterized in that, The support assembly (20) also includes two limiting wheels (221), which are located on both sides of the slide groove (2121) along the second direction (Y), and the elastic element (32) is clamped between the two limiting wheels (221).

6. The tunable dynamic vibration absorber according to claim 5, characterized in that, At least one of the two limiting wheels (221) is configured to be adjustable along the second direction (Y) to adjust the distance between the two limiting wheels (221).

7. The tunable dynamic vibration absorber according to any one of claims 1 to 6, characterized in that, The connecting component (10) includes a connecting suction cup (11), a first connecting block (12), and a second connecting block (13). The connecting suction cup (11) is installed at the bottom of the first connecting block (12). The first connecting block (12) is provided with an air suction chamber and a communication port (121). The air suction chamber is connected to the communication port (121) and the connecting suction cup (11) respectively. The second connecting block (13) is installed at the top of the first connecting block (12). The support component (20) is installed on the second connecting block (13).

8. The tunable dynamic vibration absorber according to claim 7, characterized in that, The connecting assembly (10) further includes a support cover (14), which is installed at the bottom of the first connecting block (12) and surrounds the connecting suction cup (11). The side of the support cover (14) facing away from the first connecting block (12) is used to abut against the device to be vibrated.

9. The tunable dynamic vibration absorber according to claim 8, characterized in that, The connecting assembly (10) further includes a negative pressure generator, which is connected to the communication port (121) and is used to generate negative pressure on the connecting suction cup (11).

10. The tunable dynamic vibration absorber according to any one of claims 1 to 6, characterized in that, The drive assembly (40) includes a drive motor (41) and a screw (42). The drive motor (41) is mounted on the support frame (21). The output shaft of the drive motor (41) is coaxially connected to the screw (42). The screw (42) is threadedly connected to the slider (31). The rotation of the screw (42) is configured to drive the slider (31) to move along the first direction (X).

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