Vibration absorbing device

Abstract

The application discloses a vibration absorbing device, and belongs to the technical field of damping devices. The vibration absorbing device comprises an adjusting rotating wheel, a first elastic member, a mass block and a second elastic member which are sequentially arranged along a first direction. The first elastic member and the second elastic member have elastic deformation capability along a direction perpendicular to the first direction, and the mass block can vibrate in the first direction. The adjusting rotating wheel is provided with a groove which is through along the first direction and extends from a central area of the adjusting rotating wheel to an edge in a plane perpendicular to the first direction. The adjusting rotating wheel can rotate relative to the first elastic member, and an adjusting assembly can slide along the extension direction of the groove. The adjusting assembly is connected with the groove and the first elastic member along the first direction, and the first elastic member is connected with the second elastic member. The vibration absorbing device can efficiently adjust the effective cantilever length of the leaf spring, so that the inherent frequency of the vibration absorber can be quickly adjusted. The vibration absorbing device has the advantages of compact structure, small number of overall parts, easy disassembly and installation, and strong adaptability.

Description

Technical Field

[0001] This invention relates to the field of vibration damping devices, and more specifically, to a vibration absorption device. Background Technology

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

[0003] Complex vibrations are a major obstacle restricting the development of most modern high-end equipment towards high speed and high precision. Therefore, seeking effective and reliable technologies and devices to suppress harmful vibrations is of significant practical importance. Among the many existing vibration suppression technologies, dynamic vibration absorption has advantages over other methods (such as vibration isolation and energy-dissipating vibration reduction), including high vibration suppression efficiency and ease of miniaturization. Consequently, it has been successfully applied in practical engineering problems.

[0004] The optimal vibration damping performance of a dynamic vibration absorber depends on the optimal match between its natural frequency and the target mode. Because the effective damping bandwidth of a dynamic vibration absorber is narrow, and its parameters are difficult to change after design, once the target mode frequency deviates from the effective bandwidth, the main vibrating structure is prone to re-emerging with significant resonance, greatly limiting the application of dynamic vibration absorbers. Therefore, by adding an adjustable mechanism to a passive vibration absorber, giving it parameter adjustability within a certain bandwidth, the absorber can adjust its structure to keep its dynamic parameters consistent with the theoretical optimal values ​​when the main vibrating structure itself or external conditions change. This satisfies the vibration reduction requirements when the excitation frequency changes and achieves satisfactory vibration reduction within a certain frequency range.

[0005] Early adjustable stiffness dynamic vibration absorbers were mostly large in size and the adjustment process was cumbersome, requiring the tightening or loosening of multiple screws for each stiffness adjustment, which made it difficult to meet the need for rapid stiffness adjustment. Although the stiffness adjustment method of using multiple sliders directly positioned on the cantilever beam can effectively adjust the stiffness, these vibration absorbers often cannot adjust the stiffness precisely and efficiently, which is not conducive to practical engineering applications, especially when the operating space is limited. Summary of the Invention

[0006] The objective of this invention is to at least solve the technical problem of how to quickly and efficiently adjust the stiffness of a vibration-absorbing device. This objective is achieved through the following technical solution:

[0007] The present invention provides a vibration absorption device, the vibration absorption device comprising:

[0008] First elastic element, second elastic element, mass block, adjusting wheel and adjusting assembly;

[0009] An adjusting wheel, a first elastic element, a mass block, and a second elastic element are arranged sequentially along a first direction. The adjusting wheel is at least able to rotate relative to the first elastic element. The first elastic element and the second elastic element have elastic deformation capabilities perpendicular to the first direction. The mass block is able to vibrate in the first direction. The outer end of the first elastic element is connected to the outer end of the second elastic element.

[0010] The adjusting wheel is provided with a groove that runs through the first direction and extends from the center area of ​​the adjusting wheel to the edge on a plane perpendicular to the first direction.

[0011] The adjustment component is connected to the groove and the first elastic element respectively. The adjustment component can slide along the extension direction of the groove. In a plane perpendicular to the first direction, the first elastic element can be connected to the adjustment component at multiple connection points at different distances from its central axis.

[0012] The vibration absorption device provided by this invention belongs to the category of dynamic vibration absorption devices with adjustable stiffness. Essentially, this device is a single-degree-of-freedom subsystem fixed to the main vibration structure. It transfers the vibrational energy of the main vibration structure to its own mass block through a built-in elastic element. Furthermore, its stiffness and natural frequency can be changed by rotating an adjusting wheel to adjust the effective connection length of the first elastic element.

[0013] Specifically, the first elastic element is provided with a first leaf spring and the second elastic element is provided with a second leaf spring. After the first elastic element and the second elastic element clamp and fix the mass block, they are jointly fixed to the base assembly through the connecting holes on the outer sides of the first leaf spring and the second leaf spring. An adjusting wheel is provided above the first elastic element. The connecting part of the adjusting wheel is connected to the first leaf spring of the first elastic element through an adjusting assembly. The adjusting assembly moves in the guide groove of the mass block, thereby adjusting the connection position between the adjusting wheel and the first leaf spring. By adjusting the radial connection position between the adjusting wheel and the first leaf spring, the effective connection length of the first leaf spring is changed, thereby changing the stiffness and natural frequency of the vibration absorption device.

[0014] In addition, the vibration-absorbing device according to embodiments of the present invention may also have the following additional technical features:

[0015] According to some embodiments of the vibration absorption device of the present invention, the adjusting wheel is provided with a plurality of arc-shaped grooves, and the plurality of grooves are evenly distributed around the central axis of the adjusting wheel;

[0016] When the adjusting wheel rotates relative to the first elastic element, the adjusting assembly slides along the arcuate extension direction of the groove.

[0017] According to some embodiments of the vibration damping device of the present invention, the first elastic element includes a plurality of first leaf springs, the second elastic element includes a plurality of second leaf springs; one end of the adjusting assembly is connected to the adjusting wheel through the groove along the first direction, and the other end is connected to the first leaf spring along the first direction.

[0018] According to some embodiments of the vibration-absorbing device of the present invention, the number of first leaf springs of the first elastic element and the number of second leaf springs of the second elastic element are the same.

[0019] According to some embodiments of the vibration-absorbing device of the present invention, the first leaf spring of the first elastic element and the second leaf spring of the second elastic element are arranged in parallel.

[0020] According to some embodiments of the vibration-absorbing device of the present invention, the first elastic element is a grid-shaped leaf spring, and the second elastic element is a cross-shaped leaf spring.

[0021] According to some embodiments of the vibration absorption device of the present invention, the mass block is provided with a plurality of guide grooves, the adjustment component is in clearance fit with the guide grooves and can slide along the guide grooves, and by adjusting the adjustment component at different positions in the guide grooves, the connection points between the adjustment component and the first leaf spring are adjusted.

[0022] According to some embodiments of the vibration damping device of the present invention, the adjusting assembly includes a slider and a pressure block, the pressure block being disposed above the first leaf spring, the slider being disposed below the first leaf spring, and the adjusting wheel, the pressure block, the first leaf spring, and the slider being connected in sequence by fasteners.

[0023] According to some embodiments of the vibration-absorbing device of the present invention, the vibration-absorbing device further includes a base assembly for supporting the adjusting wheel, the first elastic element, the mass block and the second elastic element, and the first leaf spring and the second leaf spring are both connected to the base assembly at their outer edges.

[0024] According to some embodiments of the vibration damping device of the present invention, the base assembly includes a fastener and a mounting seat with a mounting hole, the mounting seat being disposed between the first leaf spring and the second elastic member, and the fastener being fixedly connected to the base assembly after passing through the first leaf spring, the mounting hole of the mounting seat and the second elastic member in sequence.

[0025] According to some embodiments of the vibration absorption device of the present invention, the base assembly further includes a base, a base plate, and fasteners. The upper end of the base plate is provided with a boss, and the lower end of the base plate is provided with a groove for receiving the boss. Both the base plate and the base plate are provided with connecting holes, and the fasteners connect the base plate and the base plate together through the connecting holes.

[0026] According to some embodiments of the vibration absorption device of the present invention, the base assembly further includes a magnetic sheet disposed on the protrusion in the groove and clamped and fixed in the groove. Attached Figure Description

[0027] 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:

[0028] Figure 1 This is a top view of one embodiment of the vibration absorption device of the present invention;

[0029] Figure 2 This is an isometric view of one embodiment of the vibration absorption device of the present invention;

[0030] Figure 3 This is an exploded view of one embodiment of the vibration absorption device of the present invention.

[0031] The reference numerals in the attached figures are as follows:

[0032] 11-Base; 12-Base flange / base; 13-Magnetic plate

[0033] 21-Cross-shaped leaf spring / second elastic element 22-Grid-shaped leaf spring / first elastic element

[0034] 23-Leaf spring mounting base 30-Mass block

[0035] 41-Adjusting wheel 42-Slider

[0036] 43-Pressure block 44-Bolt Detailed Implementation

[0037] 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.

[0038] 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 mean including the plural forms. The terms “comprising,” “including,” and “having” are inclusive and therefore indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0039] Although terms such as "first," "second," 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 "third," as well as other numerical terms, do not imply order or sequence when used in this document. Furthermore, in the description of this invention, unless otherwise expressly specified and limited, the terms "set up" and "connected" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a direct connection or an indirect connection via an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] 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, "above," "inside," "near," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, in addition to 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 above and below 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.

[0041] The vibration-absorbing device of the present invention includes: a first elastic element, a second elastic element, a mass block, an adjusting wheel, and an adjusting assembly, wherein the adjusting wheel, the first elastic element, the mass block, and the second elastic element are arranged sequentially along a first direction. The first elastic element and the second elastic element have elastic deformation capabilities perpendicular to the first direction, and the mass block is capable of vibrating in the first direction. When vibrations from the external environment act on the vibration-absorbing device, since both the first elastic element and the second elastic element have buffering capabilities in the first direction, the vibrations can be transmitted to the mass block between the first elastic element and the second elastic element, thereby absorbing the vibrations from the external environment.

[0042] The adjusting wheel is provided with a groove that runs through a first direction and extends from the center region of the adjusting wheel to the edge on a plane perpendicular to the first direction. The adjusting component can slide along the extension direction of the groove. Therefore, the adjusting component connects the adjusting wheel to the first elastic element through the groove, and the adjusting component can connect the adjusting wheel to the first elastic element at different positions in the groove. The distance between the different connection positions of the groove and the center region of the adjusting wheel is different.

[0043] The adjusting component is connected to the groove and the first elastic element respectively. In a plane perpendicular to the first direction, the first elastic element can be connected to the adjusting component at multiple connection points at different distances from its central axis. The adjusting component can connect the adjusting wheel to the first elastic element, and the first elastic element has multiple connection points. Since the distances of the multiple connection points of the first elastic element from the central axis are not exactly the same, the effective connection length of the first elastic element can be adjusted by adjusting the different connection points between the adjusting wheel and the first elastic element.

[0044] The adjusting wheel can rotate relative to the first elastic element. The purpose of rotating the adjusting wheel relative to the first elastic element is to adjust the different connection positions of the adjusting component and the adjusting wheel in the groove. When the first elastic element is fixedly connected to the mass block, the adjusting wheel can also rotate relative to the mass block. When the first elastic element is fixedly connected to the second elastic element, the adjusting wheel can also rotate relative to the second elastic element. By adjusting the rotation of the adjusting wheel, the different connection positions of the adjusting wheel can be adjusted, making the overall structure of the vibration absorption device more compact.

[0045] In a preferred embodiment of the vibration absorption device of the present invention, by adjusting the rotation of the adjusting wheel, different connection positions of the adjusting component in the groove of the adjusting wheel and different connection positions of the adjusting component in the first elastic member can be adjusted simultaneously. In this embodiment, the effective connection length of the first elastic member is adjusted by the rotation of the adjusting wheel.

[0046] The adjusting component can also connect the groove of the adjusting wheel and the first elastic element in the first direction, so that different connection positions of the adjusting component with the groove and different connection positions of the first elastic element can be adjusted simultaneously in a plane perpendicular to the first direction.

[0047] The vibration-absorbing device of the present invention can be applied in different environments. The outer ends of the first elastic element and the second elastic element are connected together and connected to the equipment that can generate vibration. The vibration of the equipment is transmitted to the mass block through the action of the first elastic element and the second elastic element. Since the first direction of the vibration-absorbing device of the present invention can point to any direction in space, the vibration-absorbing device is not limited to the horizontal direction of the equipment. When the equipment vibrates in any other direction, the vibration-absorbing device of the present invention can be placed at the application position of the equipment to absorb the vibration of the equipment.

[0048] In the vibration absorption device of the present invention, the groove of the adjusting wheel can extend in an arc from the center area of ​​the adjusting wheel to the edge, and multiple grooves are evenly distributed around the central axis of the adjusting wheel. This arrangement is more conducive to further adjusting the different connection positions of the adjusting component in the groove by adjusting the rotation of the adjusting wheel, and makes it easier to slide the adjusting component along the arc extension direction of the groove.

[0049] In the vibration damping device of the present invention, the first elastic element and the second elastic element can be configured as leaf springs. Specifically, the first elastic element includes a plurality of first leaf springs, and the second elastic element includes a plurality of second leaf springs. For example, the first leaf spring and the second leaf spring are configured as a slender beam structure, and the first elastic element is connected to the adjustment assembly through the first leaf spring.

[0050] In the vibration absorption device of the present invention, there are no restrictions on the specific structure of the first elastic element and the second elastic element. The first elastic element and the second elastic element can be arranged in detail according to the specific application equipment. For example, the first leaf spring of the first elastic element and the second leaf spring of the second elastic element can be set to have the same number. The first leaf spring of the first elastic element and the second leaf spring of the second elastic element can also be arranged in parallel. More specifically, the first elastic element can be a grid-shaped leaf spring and the second elastic element can be a cross-shaped leaf spring.

[0051] In order to better adjust the stiffness of the vibration absorption device, multiple guide grooves can be set in the mass block in the vibration absorption device of the present invention, and the adjustment component is set in the guide groove and can slide along the guide groove. Preferably, the adjustment component is fitted with the guide groove with a clearance. By adjusting the adjustment component at different positions in the guide groove, the connection points between the adjustment component and the first leaf spring can be adjusted.

[0052] The adjustment assembly of the vibration damping device of the present invention may include a pressure block disposed above the first leaf spring and a slider disposed below the first leaf spring, and the adjustment wheel, the pressure block, the first leaf spring and the slider are sequentially connected by fasteners.

[0053] The vibration absorption device of the present invention will be explained in detail below with reference to the accompanying drawings.

[0054] Figure 1 This is a top view of one embodiment of the vibration absorption device of the present invention, as shown below. Figure 1 As shown, in the vibration absorption device provided by the present invention, the adjusting wheel 41 is located at the upper part of the vibration absorption device. External vibrations are first transmitted to the vibration absorption device through the adjusting wheel 41, and the mass block 30 in the vibration absorption device can ultimately absorb the external vibrations.

[0055] The adjusting wheel is located above the first elastic element and has a second central connecting hole. The adjusting wheel is connected to the first central connecting hole of the mass block through a fastener and the second central connecting hole, thereby fixing the adjusting wheel and the mass block together as one unit. When the fastener is removed or loosened and there is no pre-tightening force, the adjusting wheel and the mass block can rotate relative to each other.

[0056] The adjusting wheel has a connecting part in the radial direction, which is used to connect with the first slender beam of the first elastic element. The connecting part can adopt different structural forms according to specific applications. The connecting part can be multiple cam grooves that pass through the adjusting wheel axially. Along the cam grooves, the adjusting wheel can be connected to the first slender beam at different positions in the radial direction. The multiple cam grooves can be evenly distributed around the central axis of the adjusting wheel, so that different connection points can be set in the circumferential direction on the surface of the adjusting wheel to achieve the purpose of fastening the connection.

[0057] In one embodiment of the vibration absorption device of the present invention, such as Figure 1 As shown, the horizontal cross-section of the cam groove is arc-shaped, and the cam groove extends from the center area of ​​the adjusting wheel to its edge. The cam groove is evenly distributed around the central axis of the adjusting wheel.

[0058] When the adjusting wheel rotates relative to the mass block, the radial connection position of the adjusting wheel can be changed along the arc-shaped cam groove, thereby adjusting the stiffness of the vibration absorption device.

[0059] The connecting part of the adjusting wheel can also be configured as several connecting holes in a radially discrete section. The adjusting wheel is connected to the first slender beam through different connecting holes. Different connecting holes can precisely fix the connection position of the adjusting wheel, so as to achieve the purpose of precisely adjusting the stiffness of the vibration absorption device.

[0060] Figure 2 This is an isometric view of one embodiment of the vibration absorption device of the present invention, as shown below. Figure 2As shown, the lower part of the vibration absorption device of the present invention is a base assembly, which is used to support the entire vibration absorption device.

[0061] In one embodiment of the vibration absorption device of the present invention, the base assembly includes a base 11 and a base 12. The upper end of the base 12 is provided with a boss, and the lower end of the base 11 is provided with a groove to accommodate the boss. Both the base 12 and the base 11 are provided with through holes in the circumference. The base 12 and the base 11 are connected by fasteners and through holes.

[0062] In one embodiment of the vibration absorption device of the present invention, such as Figure 3 As shown, the base assembly also includes a magnetic plate 13, which is disposed on a protrusion in the groove of the base 11 and clamped and fixed in the groove of the base 11.

[0063] like Figure 2 As shown, the base assembly is provided with an elastic component and a mass block. The elastic component includes a first elastic element and a second elastic element. The mass block is disposed between the first elastic element and the second elastic element. The outer sides of the first elastic element and the second elastic element are fixedly connected to the base assembly.

[0064] like Figure 3 As shown, the first elastic member 22 has a first slender beam evenly distributed in the circumferential direction, and the second elastic member 21 has a second slender beam evenly distributed in the circumferential direction; the outer sides of the first slender beam and the second slender beam have a first connecting hole evenly distributed in the circumferential direction, and the inner sides of the first elastic member 22 and the second elastic member 21 have a second connecting hole evenly arranged in the circumferential direction; the first elastic member 22 is provided with a central through hole, wherein the first elastic member 22 and the second elastic member 21 are connected to the base assembly through fasteners and the first through hole;

[0065] In one embodiment of the vibration absorption device of the present invention, the first elastic element 22 is a grid-shaped leaf spring and the second elastic element 21 is a cross-shaped leaf spring.

[0066] In one embodiment of the vibration absorption device of the present invention, the first slender beam of the first elastic member 22 and the second slender beam of the second elastic member 21 have the same number, wherein the first slender beam and the second slender beam can also be arranged in parallel.

[0067] like Figure 2 and Figure 3 The vibration absorption device of the present invention further includes a mass block 30, a first elastic member 22 disposed on the upper part of the mass block, and the mass block is provided with a guide groove through which a first slender beam passes; a second elastic member is disposed below the mass block, and similarly, a guide groove for the second slender beam of the second elastic member to pass through is provided below the mass block 30.

[0068] Since the first elastic element and the second elastic element have second connecting holes evenly arranged in the inner circumference, and the mass block has a fourth connecting hole in the inner circumference, the second connecting hole of the first elastic element and the fourth connecting hole of the mass block can be connected by fasteners, and the second connecting hole of the second elastic element and the fourth connecting hole of the mass block can be connected by fasteners, so that the first elastic element, the second elastic element and the mass block can be connected as a whole.

[0069] The mass block 30 is also provided with a first central connecting hole, and the first central connecting hole of the mass block 30 is connected to the central through hole of the first elastic element and the second central connecting hole of the adjusting wheel by fasteners.

[0070] In one embodiment of the vibration absorption device of the present invention, the vibration absorption device further includes an adjustment component, which is disposed in the guide groove of the mass block and is used to connect the connecting part of the adjustment wheel and the first slender beam of the first elastic member. The adjustment component can move along the guide groove to adjust the connection position between the adjustment wheel and the first slender beam of the first elastic member.

[0071] When the connecting part of the adjusting wheel is a plurality of cam grooves that pass through axially, one end of the adjusting mechanism can move along the cam grooves, and the other end of the adjusting component can move along the guide groove of the mass block to adjust the connection position of the first elastic element and the rigid adjusting wheel.

[0072] In one embodiment of the vibration absorption device of the present invention, such as Figure 3 As shown, the adjustment mechanism includes a slider 42 and a pressure block 43. The upper surface of the slender beam of the first elastic element is in contact with the lower surface of the pressure block 43, and the lower surface of the slender beam of the first elastic element is in contact with the upper surface of the slider 42. The adjustment wheel, pressure block, slender beam and slider are connected in sequence by fasteners.

[0073] The vibration damping device provided by this invention can adjust its stiffness by using an internal cam mechanism. The suspension length of multiple leaf springs can be adjusted simultaneously by simply adjusting the rotation angle of the cover plate. This can make the vibration damper structure more compact while significantly improving its frequency regulation efficiency.

[0074] Compared with traditional dynamic vibration absorbers, the vibration absorption device of the present invention has the following advantages: it can adjust the effective cantilever length of the leaf spring more efficiently, thereby achieving the purpose of quickly adjusting the natural frequency of the vibration absorber; it has a compact structure, fewer overall parts, and is easy to disassemble and install, making it highly adaptable; it requires no driving power supply and causes no pollution to the environment.

[0075] The vibration absorption device of the present invention also provides the following specific embodiments.

[0076] Example 1

[0077] The vibration damping device of the present invention includes a base assembly, a leaf spring assembly, a mass block 30, and a stiffness adjustment assembly. The inner and outer ends of the leaf spring assembly are fixedly connected to the mass block 30 and the base assembly, respectively, by screws. The stiffness adjustment assembly is disposed on the mass block 30 and the leaf spring assembly.

[0078] The base assembly includes a base 11, a base flange 12, and a magnetic attractor 13. To achieve a lightweight structure, both the base 11 and the base flange are thin-walled cylindrical shell structures made of aluminum. A cylindrical groove is formed at the bottom of the base 11, and the magnetic attractor 12 is placed in the groove, forming a clearance fit. A cylindrical boss at the upper end of the base flange 13 extends into the cylindrical groove at the bottom of the base 11, also forming a clearance fit. By tightening the circumferentially distributed screws, the base flange 13 can press the magnetic attractor 12 firmly into the cylindrical groove of the base 11.

[0079] The leaf spring assembly includes a cross-shaped leaf spring 21, a grid-shaped leaf spring 22, and leaf spring mounting seats 23. The grid-shaped leaf spring 22 is placed parallel to the cross-shaped leaf spring 21. The four leaf spring mounting seats 22 are respectively located between the four outer ends of the grid-shaped leaf spring 22 and the cross-shaped leaf spring 21, and the cross-shaped leaf spring 21, the grid-shaped leaf spring 22, and the leaf spring mounting seats 23 are fixed together on the base 11 by screws.

[0080] The mass block 30 has four threaded holes on its upper and lower surfaces respectively. The lower end is fixed to the cross-shaped leaf spring 21 by screws, and the upper end is fixed to the grid-shaped leaf spring 22 by screws. At this time, the inner ends of the cross-shaped leaf spring 21 and the grid-shaped leaf spring 22 can achieve elastic bending relative to the outer ends, so that the mass block 30 can vibrate axially relative to the base assembly.

[0081] The stiffness adjustment assembly includes an adjustment wheel 41 and four leaf spring length adjustment mechanisms. The adjustment wheel 41 is a flat cylinder with four centrally symmetrical cam slots and a central threaded through hole. The adjustment wheel 41 is connected to the mass block 30 via a central bolt and can rotate relative to it. The leaf spring length adjustment mechanism includes a slider 42, a pressure block 43, and a bolt 44, which are slidably mounted on the four cantilever beams of the grid-shaped leaf spring 22. The mass block 30 has four evenly distributed rectangular grooves. The slider 42 and the pressure block 43 are accommodated in the rectangular grooves to form a clearance fit and can slide along the grooves. The slider 42 and the pressure block 43 are connected by a screw 44 that passes through the cam slot of the adjustment wheel 41. The upper surface of the slider 42 coincides with the lower surface of the grid-shaped leaf spring 22, and the lower surface of the pressure block 43 coincides with the upper surface of the grid-shaped leaf spring 22. When the adjusting wheel 41 rotates relative to the mass block 30, the leaf spring length adjusting mechanism, under the combined constraint of the cam groove of the adjusting wheel 41 and the guide groove of the mass block 30, performs a translational motion on the cantilever beam of the grid-shaped leaf spring 22. When the bolt 44 is tightened, the slider 42 and the pressure block 43 can press the grid-shaped leaf spring 22 together, and fix the adjusting wheel 41 and the mass block 30, thereby changing the effective cantilever length of the grid-shaped leaf spring 22 and realizing the efficient adjustment of the device's natural frequency.

[0082] Once the vibration-absorbing device of this invention is assembled, the mass block 30 has a translational degree of freedom relative to the base 11, perpendicular to the bottom surface of the base. Compared to traditional adjustable dynamic vibration absorbers, this invention can achieve more efficient frequency tuning with a more compact structure.

[0083] The compact and efficiently adjustable dynamic vibration absorption device provided by this invention can effectively suppress structural vibration. In practical operation, the device can be quickly fixed and disassembled with the main vibrating structure via a magnetic base. When the vibration absorber is working, when the main vibrating structure vibrates due to external excitation, the mass block will generate linear vibration perpendicular to the base direction. Simultaneously, a force opposite to the external excitation force is applied to the main structure through the leaf spring, thereby transferring the vibration energy of the main structure and achieving the purpose of suppressing its vibration. Based on the actual vibration suppression effect, the natural frequency of the vibration absorber can be changed by altering the rotation angle of the rotating wheel, thereby maximizing the vibration absorption effect on the main structure.

[0084] The vibration-absorbing device provided by this invention has a compact structure, effectively suppressing vibrations in spaces with limited installation space. Furthermore, it allows for rapid adjustment of the device's stiffness to address vibrations in dynamically variable structures. This vibration-absorbing device belongs to the category of passive / semi-active vibration control damping devices.

[0085] 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 vibration-absorbing device, characterized in that, The vibration absorption device includes: First elastic element, second elastic element, mass block, adjusting wheel and adjusting assembly; An adjusting wheel, a first elastic element, a mass block, and a second elastic element are arranged sequentially along a first direction. The adjusting wheel is at least able to rotate relative to the first elastic element. The first elastic element and the second elastic element have elastic deformation capabilities perpendicular to the first direction. The mass block is able to vibrate in the first direction. The outer end of the first elastic element is connected to the outer end of the second elastic element. The adjusting wheel is provided with a groove that runs through the first direction and extends from the center area of ​​the adjusting wheel to the edge on a plane perpendicular to the first direction. The adjustment component is connected to the groove and the first elastic element respectively. The adjustment component can slide along the extension direction of the groove. In a plane perpendicular to the first direction, the first elastic element can be connected to the adjustment component at multiple connection points at different distances from its central axis. The adjusting wheel is provided with a plurality of arc-shaped grooves, which are evenly distributed around the central axis of the adjusting wheel; When the adjusting wheel rotates relative to the first elastic element, the adjusting assembly slides along the arcuate extension direction of the groove; The first elastic element includes a plurality of first leaf springs, and the second elastic element includes a plurality of second leaf springs; One end of the adjustment component is connected to the adjustment wheel along the first direction through the groove, and the other end is connected to the first leaf spring along the first direction; The mass block is provided with multiple guide grooves, and the adjustment component is in clearance fit with the guide grooves and can slide along the guide grooves. By adjusting the adjustment component at different positions in the guide grooves, the connection points between the adjustment component and the first leaf spring can be adjusted. The adjustment assembly includes a slider and a pressure block. The pressure block is located above the first leaf spring, and the slider is located below the first leaf spring. The adjustment wheel, the pressure block, the first leaf spring, and the slider are connected in sequence by fasteners.

2. The vibration-absorbing device according to claim 1, characterized in that, The number of first leaf springs in the first elastic element and the number of second leaf springs in the second elastic element are the same.

3. The vibration-absorbing device according to claim 1, characterized in that, The first leaf spring of the first elastic element and the second leaf spring of the second elastic element are arranged in parallel.

4. The vibration-absorbing device according to claim 1, characterized in that, The first elastic element is a grid-shaped leaf spring, and the second elastic element is a cross-shaped leaf spring.

5. The vibration-absorbing device according to any one of claims 1-4, characterized in that, The vibration damping device further includes a base assembly, which is used to support the adjusting wheel, the first elastic element, the mass block and the second elastic element, and the first leaf spring and the second leaf spring are both connected to the base assembly at their outer edges.

6. The vibration-absorbing device according to claim 5, characterized in that, The base assembly includes a fastener and a mounting base with mounting holes. The mounting base is disposed between the first leaf spring and the second elastic member. The fastener passes through the first leaf spring, the mounting hole of the mounting base, and the second elastic member in sequence and is then fixedly connected to the base assembly.

7. The vibration-absorbing device according to claim 5, characterized in that, The base assembly further includes a base, a base plate, and fasteners. The upper end of the base plate is provided with a boss, and the lower end of the base plate is provided with a groove to accommodate the boss. Both the base plate and the base plate are provided with connecting holes, and the fasteners connect the base plate and the base plate together as one unit through the connecting holes.

8. The vibration-absorbing device according to claim 7, characterized in that, The base assembly also includes a magnetic plate, which is disposed on the protrusion in the groove and clamped and fixed in the groove.

Images