Combined dynamic vibration absorber based on leaf spring frequency modulation

Abstract

The invention provides a combined type dynamic vibration absorber based on leaf spring frequency modulation. The combined type dynamic vibration absorber comprises a plurality of vibration absorption units which are fixedly installed or fixedly installed on a vibration platform after free combination. Each vibration absorption unit comprises a shell, a leaf spring and a vibrator assembly. The shell is provided with an accommodating cavity. The leaf spring is arranged in the containing cavity, and the two ends of the leaf spring are connected with the shell. The vibrator assembly is arranged in the containing cavity and fixedly arranged on the leaf spring, and the vibrator assembly is provided with a vibration compensation space for the leaf spring to penetrate through. According to the combined dynamic vibration absorber based on leaf spring frequency modulation, the inherent frequency of the vibration absorber can be adjusted, the vibration absorber has self-adaptability to the vibration strength, the vibration reduction frequency band is widened, the unitized combined design can effectively adapt to complex vibration environments of various frequencies, and the vibration reduction effect is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of vibration absorption and vibration reduction, and in particular relates to a combined dynamic vibration absorber based on leaf spring frequency modulation. Background Art

[0002] In the engineering field, such as mechanical equipment, building structures, and transportation, vibration problems are common and have far-reaching impacts. Long-term vibration will lead to performance degradation, structural damage, and even increase safety hazards. Effective vibration control can improve the reliability and life of the system, reduce maintenance costs, and ensure safe production. By installing a suitable vibration control structure on the vibration platform, the dynamic performance of the vibration platform can be significantly improved.

[0003] In the prior art, vibration control mainly relies on vibration absorbers, dampers and vibration isolators, etc. These devices usually have the advantages of simple structure, easy maintenance and low cost. Among them, vibration absorbers are the most common passive control devices, and the internal vibration reduction parts often use springs. Therefore, their vibration reduction effect is usually limited to a specific frequency range (linear) and is more dependent on a specific frequency. Therefore, when facing a vibration environment with multiple frequencies or changing frequencies (non-linear), the vibration absorber cannot effectively cope with the complex and changeable vibration environment, resulting in poor vibration reduction effect. Summary of the invention

[0004] The embodiment of the present invention provides a combined dynamic vibration absorber based on leaf spring frequency modulation, aiming to solve the problem of poor practicality of existing vibration absorbers due to their inability to cope with multi-frequency or variable frequency vibration environments.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide a combined dynamic vibration absorber based on leaf spring frequency modulation, including a plurality of vibration absorbing units which are fixedly installed separately or fixedly installed on a vibration platform after free combination; wherein,

[0006] Each of the vibration absorbing units comprises:

[0007] A housing having a receiving cavity;

[0008] A leaf spring is arranged in the accommodating cavity, and two ends of the leaf spring are connected to the housing;

[0009] The vibrator assembly is arranged in the accommodating cavity and fixed on the leaf spring. The vibrator assembly has a vibration compensation space for the leaf spring to penetrate.

[0010] In a possible implementation, the leaf spring is provided with a;

[0011] The vibrator assembly comprises:

[0012] A mass block having a through cavity for the leaf spring to pass through, wherein the through cavity is the vibration compensation space;

[0013] There are two frequency-modulating pads, each of which is arranged in the through cavity, and the two frequency-modulating pads are used to clamp and fix on the leaf spring.

[0014] In a possible implementation, each of the frequency tuning pads is located at a middle position of the leaf spring.

[0015] In a possible implementation, elastic pads are respectively installed at both ends of the assembly formed by the two mass blocks along the vibration direction of the leaf spring.

[0016] In a possible implementation, the housing includes:

[0017] A cylinder body having a cylinder cavity;

[0018] Two end covers are provided, and the two end covers are respectively connected to the two ends of the cylinder body to enclose the cylinder cavity to form the accommodating cavity; the two end covers are respectively used to fix the two ends of the leaf spring;

[0019] The vibration direction of the leaf spring is set as a first direction, and the direction perpendicular to the first direction and the length direction of the barrel cavity is set as a second direction;

[0020] Wherein, in the first direction, the end cover is provided with a first connecting portion; in the second direction, the end cover is provided with a second connecting portion.

[0021] In a possible implementation, at least two leaf springs are provided, and the leaf springs are arranged in parallel and at intervals;

[0022] The vibrator assembly comprises:

[0023] The mass block has a plurality of through cavities for the leaf springs to pass through respectively, and the through cavities are combined to form the vibration compensation space;

[0024] There are multiple clamping structures, each of which is arranged in each of the through cavities; each of the clamping structures includes two frequency-modulating pads, and the two frequency-modulating pads are used to clamp and fix on the leaf spring in the corresponding through cavity.

[0025] In a possible implementation, each frequency tuning pad is located at a middle position of the corresponding leaf spring.

[0026] In a possible implementation, elastic pads are respectively embedded at both ends of the mass block along the vibration direction of the leaf spring.

[0027] In a possible implementation, the housing includes:

[0028] A cylinder body having a cylinder cavity;

[0029] Two end covers are provided, and the two end covers are respectively connected to the two ends of the cylinder body to enclose the cylinder cavity to form the accommodating cavity; the two end covers are respectively used to fix the two ends of the leaf spring;

[0030] The vibration direction of each leaf spring is set as a first direction, and the direction perpendicular to the first direction and the length direction of the barrel cavity is set as a second direction;

[0031] Wherein, in the first direction, the end cover is provided with a first connecting portion; in the second direction, the end cover is provided with a second connecting portion.

[0032] In a possible implementation, the shell is a rectangular parallelepiped structure.

[0033] In this implementation, multiple vibration absorbing units can be fixedly installed independently or in combination on the vibration platform, which can be applied to vibration reduction of different structures, and can also ensure flexible installation, or installation in irregular or space-constrained locations. Each vibration absorbing unit uses a leaf spring to connect the vibrator, and both ends of the leaf spring are connected to the housing, which can effectively adapt to multi-frequency or variable frequency vibration environments. Using leaf springs to provide stiffness for the vibrator can improve the adaptability of the vibration absorber to vibration intensity, widen the vibration reduction frequency band, and ensure the vibration reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic structural diagram of a combined dynamic vibration absorber based on leaf spring frequency modulation provided in the first embodiment of the present invention;

[0035] Figure 2 A schematic structural diagram of a combined dynamic vibration absorber based on leaf spring frequency modulation provided in the second embodiment of the present invention;

[0036] Figure 3 for Figure 1 A schematic cross-sectional view of a combined dynamic vibration absorber based on leaf spring frequency modulation provided in an embodiment;

[0037] Figure 4 for Figure 2 A schematic cross-sectional view of a combined dynamic vibration absorber based on leaf spring frequency modulation provided in an embodiment;

[0038] Figure 5 for Figure 3 A schematic diagram of the enlarged structure of the combined dynamic vibration absorber based on leaf spring frequency modulation provided in the embodiment;

[0039] Figure 6 for Figure 3 A schematic diagram of a BB-section structure of a combined dynamic vibration absorber based on leaf spring frequency modulation provided in an embodiment;

[0040] Figure 7 for Figure 4 A schematic structural diagram of another implementation scheme of a combined dynamic vibration absorber based on leaf spring frequency modulation provided in an embodiment;

[0041] Figure 8 for Figure 4 A CC-direction cross-sectional structural diagram of a combined dynamic vibration absorber based on leaf spring frequency modulation provided in an embodiment;

[0042] Fig. 9 A schematic diagram of a specific implementation structure of a combined dynamic vibration absorber based on leaf spring frequency modulation provided in the first embodiment of the present invention;

[0043] Fig.10 This is a schematic diagram of the superimposed combination implementation structure of the combined dynamic vibration absorber based on leaf spring frequency modulation provided in Example 1 of the present invention.

[0044] Description of reference numerals:

[0045] 100, vibration absorbing unit; 10, housing; 11, cylinder; 111, top plate; 112, side plate; 12, end cover; 121, first connecting portion; 122, second connecting portion; 20, leaf spring; 30, vibrator assembly; 31, mass block; 311, clamping block; 312, middle block; 313, cover plate; 314, vibration compensation space; 32, frequency modulation pad; 33, elastic pad; 34, adjustment structure; 341, moving block; 342, bolt; 343, arc portion;

[0046] 200. Vibration platform. DETAILED DESCRIPTION

[0047] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0048] Please also read Figures 1 to 4 , the combined dynamic vibration absorber based on leaf spring frequency modulation provided by the present invention is now described. The combined dynamic vibration absorber based on leaf spring frequency modulation includes a plurality of vibration absorbing units 100 that are fixedly installed on a vibration platform 200 respectively or fixedly installed after free combination. Each vibration absorbing unit 100 includes a housing 10, a leaf spring 20 and a vibrator assembly 30. The housing 10 has an accommodating cavity. The leaf spring 20 is arranged in the accommodating cavity, and both ends of the leaf spring 20 are connected to the housing 10. The vibrator assembly 30 is arranged in the accommodating cavity and fixedly mounted on the leaf spring 20. The vibrator assembly 30 has a vibration compensation space 314 for the leaf spring 20 to pass through.

[0049] Compared with the prior art, the combined dynamic vibration absorber based on leaf spring frequency modulation provided in this embodiment has multiple vibration absorbing units 100 that can be fixedly installed independently or fixedly installed on the vibration platform 200 after being combined, which can be applicable to vibration reduction of different structures, and can also ensure flexible installation, or installation in irregular or space-constrained positions. In each vibration absorbing unit 100, a leaf spring 20 is used to connect the vibrator, and both ends of the leaf spring 20 are connected to the housing 10, which can effectively adapt to the vibration environment of multiple frequencies or variable frequencies. The leaf spring 20 is used to provide stiffness for the vibrator to improve the adaptability of the vibration absorber to the vibration intensity, widen the vibration reduction frequency band, and can effectively adapt to the vibration environment of multiple frequencies or variable frequencies to ensure the vibration reduction effect.

[0050] For ease of understanding, in this embodiment, nonlinear vibration is involved, and sudden changes in amplitude may occur, and the sudden changes in amplitude may be increased or decreased. Therefore, the two ends of the leaf spring 20 are connected to the housing 10 respectively, so that when the vibrator assembly 30 causes the leaf spring 20 to vibrate due to the inertial force, the leaf spring 20 will pull the connection points at both ends after deformation, and the amplitude of the vibrator assembly 30 cannot be too large, which can effectively adapt to the working environment with severe vibration.

[0051] Embodiment 1: (the number of leaf springs 20 is one)

[0052] In some embodiments, the above can be used as follows Figure 3 See the structure shown. Figure 3 , when the leaf spring 20 is provided with one. The vibrator assembly 30 includes a mass block 31 and a frequency tuning pad 32. The mass block 31 has a through cavity for the leaf spring 20 to pass through, and the through cavity is a vibration compensation space 314. Two frequency tuning pads 32 are provided, each frequency tuning pad 32 is arranged in the through cavity, and the two frequency tuning pads 32 can be clamped and fixed on the leaf spring 20.

[0053] The through cavity on the mass block 31 can ensure the passage of the leaf spring 20. As for the through cavity, the two ends of the through cavity can be expanded to form a trumpet shape to adapt to the reciprocating vibration of the mass block 31, avoid interference with the mass block 31, and thus ensure the effective operation of the leaf spring 20.

[0054] The leaf spring 20 is clamped and fixed by two frequency tuning pads 32. The two frequency tuning pads 32 can be respectively arranged on both sides of the plate surface of the leaf spring 20, and each frequency tuning pad 32 is provided with an abutting surface abutting against the leaf spring 20, so that the two frequency tuning pads 32 can stably clamp the leaf spring 20.

[0055] In this embodiment, the two frequency tuning pads 32 can adopt a tongue-and-groove joint structure to ensure further limiting of the leaf spring 20, see Figure 6 .

[0056] As an implementation of the mass block 31 in this embodiment, please refer to Figure 3 The mass block 31 may include two clamping blocks 311 that are detachably connected by bolts 342. Each clamping block 311 has a mating surface, and an open groove that runs through both ends is provided on the mating surface of each clamping block 311. After the two clamping blocks 311 are mated, the two open grooves are combined to form a receiving cavity or a vibration compensation space. This structure can facilitate the fixed installation of the leaf spring 20 and the frequency modulation pad 32, and can also facilitate the replacement of the frequency modulation pad 32.

[0057] In this embodiment, the mass block 31 may be a rectangular parallelepiped structure.

[0058] In some embodiments, the frequency modulation pad 32 can be used as follows: Figure 3 See the structure shown. Figure 3 Each frequency tuning pad 32 is located in the middle of the leaf spring 20. This structure can ensure that the lengths of the leaf springs 20 on both sides of the frequency tuning pad 32 are the same, thereby ensuring the stability of the vibration of the mass block 31 and the uniformity of the force on the leaf spring 20.

[0059] It should be noted that, in case of different vibration absorption environments, the specifications of the leaf spring 20 and the frequency-modulating pad 32 can be changed before installation according to different vibration environments, for example, the thickness of the leaf spring 20 can be increased or decreased, or the length of the frequency-modulating pad 32 in the extension direction of the leaf spring 20 can be increased or decreased to adjust its natural frequency. By replacing the frequency-modulating pad 32 of different lengths, the frequency of the vibration absorber can be adjusted, which can effectively adapt to the vibration environment of multiple frequencies or variable frequencies. By using the leaf spring 20 to provide stiffness for the vibrator, the adaptability of the vibration absorber to the vibration intensity can be improved, and the vibration reduction frequency band can be widened, which can effectively adapt to the vibration environment of multiple frequencies or variable frequencies and ensure the vibration reduction effect.

[0060] In some embodiments, the mass block 31 may be formed as follows: Figure 3 See the structure shown. Figure 3 Along the vibration direction of the leaf spring 20, elastic pads 33 are installed at both ends of the assembly formed by the two mass blocks 31. The arrangement of the elastic pads 33 can prevent the mass blocks 31 from having a hard contact with the inner wall of the housing 10 during the reciprocating movement of the mass blocks 31, thereby protecting the mass blocks 31 and the housing 10. At the same time, when the elastic pads 33 contact the inner wall of the housing 10, the vibration environment is bound to be more serious. At this time, the elastic pads 33 can also eliminate part of the energy.

[0061] The elastic pad 33 may be a metal rubber or other block-shaped structure with a certain elasticity, and the elastic pad 33 may be embedded at both ends of the mass block 31. Correspondingly, both ends of the mass block 31 may be provided with embedding grooves for the mass block 31 to be placed.

[0062] In some embodiments, the housing 10 may be Figure 1 See the structure shown. Figure 1 The housing 10 includes a cylinder 11 and an end cover 12. The cylinder 11 has a cylinder cavity. Two end covers 12 are provided, and the two end covers 12 are respectively connected to the two ends of the cylinder 11 to enclose the cylinder cavity to form a receiving cavity. The two end covers 12 are respectively fixedly connected to the two ends of the leaf spring 20.

[0063] The cylinder 11 may be a prismatic structure, and the size of the cylinder cavity needs to be larger than the size of the mass block 31 to ensure that the mass block 31 has a movable space in the cylinder cavity.

[0064] As a specific embodiment of the cylinder 11, the cylinder 11 may be a quadrangular prism-shaped structure, including two parallel top plates 111 and two parallel side plates 112, each of which is enclosed by each of the top plates 111 and the side plates 112 to form a quadrangular prism-shaped structure. In order to facilitate assembly and connection, a card slot may be provided on the two top plates 111 to card the two side plates 112. Figure 6 .

[0065] Specifically, the vibration direction of the leaf spring 20 is set as the first direction, and the direction perpendicular to the first direction and the length direction of the barrel cavity is set as the second direction. In the first direction, the end cover 12 is provided with a first connecting portion 121. In the second direction, the end cover 12 is provided with a second connecting portion 122. This structure can ensure the free combination of each vibration absorbing unit 100, or the vibration absorbing unit 100 is directly fixedly installed on the vibration platform 200.

[0066] Specifically, regarding the first connection portion 121 and the second connection portion 122, an inner groove may be provided on the outer plate surface of the end cover 12, and a plurality of connection holes for the bolts 342 or screws to pass through may be provided on the side wall of the inner groove. In addition, the connection between the end cover 12 and the cylinder body 11 may be bolted, and the connection between the leaf spring 20 and the end cover 12 may also be bolted.

[0067] In some embodiments, the mass block 31 may be formed as follows: Figure 5 See the structure shown. Figure 5As an embodiment of the auxiliary frequency tuning pad 32, the vibrator assembly 30 may further include an adjustment structure 34, and two adjustment structures 34 are provided. The two adjustment structures 34 are respectively located on both sides of the frequency tuning pad 32 along the extension direction of the leaf spring 20. Each adjustment structure 34 includes a moving block 341 and an adjustment bolt 342. There are two moving blocks 341, and the two moving blocks 341 are located on both sides of the leaf spring 20 along the normal direction of the leaf spring 20, and are both slidably connected to the sliding cavity provided in the mass block 31 and connected to the through cavity. Each moving block 341 is provided with an arc portion 343 at the end close to the leaf spring 20, and the arc portion 343 is provided close to the opening of the through cavity, and the axis is perpendicular to the extension direction of the through cavity. There are two bolts 342, corresponding to the two moving blocks 341 respectively, and each bolt 342 is rotationally connected to the corresponding mass block 31 (axially immovable limited rotation connection, such as a thrust bearing), and is threadedly connected to the moving block 341, which can drive the moving block 341 to move close to the leaf spring 20. In each adjustment structure 34 , two bolts 342 can be used to adjust the relative movement of the two moving blocks 341 and clamp the leaf spring 20 . At this time, the effective length of the leaf spring 20 can be reduced, thereby achieving convenient adjustment.

[0068] Embodiment 2: (the number of leaf springs 20 is at least two)

[0069] In some embodiments, the vibrator assembly 30 may be configured as follows: Figure 4 See the structure shown. Figure 4 At least two leaf springs 20 are provided, and each leaf spring 20 is arranged in parallel and at intervals.

[0070] The vibrator assembly 30 includes a mass block 31 and a clamping structure. The mass block 31 has a plurality of through cavities for each leaf spring 20 to pass through, and each through cavity is combined to form a vibration compensation space 314. There are a plurality of clamping structures, and each clamping structure is respectively arranged in each through cavity. Each clamping structure includes two frequency tuning pads 32, and the two frequency tuning pads 32 can be clamped and fixed on the leaf spring 20 in the corresponding through cavity.

[0071] The through cavity on the mass block 31 can ensure the passage of the leaf spring 20, and the spacing direction of each through cavity is set parallel to the normal direction of each leaf spring 20. As for the through cavity, the two ends of the through cavity can be expanded to form a trumpet shape to adapt to the reciprocating vibration of the mass block 31, avoid interference with the mass block 31, and thus ensure the effective operation of the leaf spring 20. Multiple leaf springs 20 are superimposed to ensure that the natural frequency can be adjusted, thereby ensuring that the vibration platform 200 with larger vibration can be adapted.

[0072] In each clamping structure, the corresponding leaf spring 20 is clamped and fixed by two frequency-tuning pads 32. The two frequency-tuning pads 32 can be respectively arranged on both sides of the plate surface of the leaf spring 20, and each frequency-tuning pad 32 is provided with an abutting surface abutting against the leaf spring 20, so that the two frequency-tuning pads 32 can stably clamp the leaf spring 20.

[0073] In this embodiment, the two frequency tuning pads 32 can adopt a tongue-and-groove joint structure to ensure further limiting of the leaf spring 20, see Figure 7 .

[0074] As an implementation of the mass block 31 in this embodiment, please refer to Figure 7 The mass block 31 may include a plurality of clamping blocks 311 that are detachably connected by bolts 342, and each clamping block 311 may be stacked and placed. Each clamping block 311 (except the clamping blocks 311 at both ends) has two mating surfaces, and an open groove that passes through both ends is provided on the mating surface of each clamping block 311. After the two clamping blocks 311 are stacked and mated, the two open grooves are combined to form a accommodating cavity. Of course, the clamping blocks 311 at both ends are only provided with one mating surface. This structure can facilitate the fixed installation of the leaf spring 20 and the frequency modulation pad 32, and can also facilitate the replacement of the frequency modulation pad 32.

[0075] As another specific implementation of the mass block 31 in this embodiment, please refer to Figure 4 When only two leaf springs 20 are provided, the mass block 31 includes an intermediate block 312 and a cover plate 313. The intermediate block 312 has two parallel end faces, each of which is provided with an open groove that passes through both ends. Two cover plates 313 are provided, and the two cover plates 313 can be buckled on the two open grooves respectively and fixed by bolts 342. After each cover plate 313 is buckled on the open groove, a through cavity is formed.

[0076] In this embodiment, the mass block 31 may be a rectangular parallelepiped structure.

[0077] In some embodiments, the frequency modulation pad 32 can be used as follows: Figure 4 and Figure 7 See the structure shown. Figure 4 and Figure 7 Each frequency tuning pad 32 is located at the middle position of the corresponding leaf spring 20. This structure can ensure that the lengths of the leaf springs 20 on both sides of the frequency tuning pad 32 are the same, thereby ensuring the stability of the vibration of the mass block 31 and the uniformity of the force on the leaf spring 20.

[0078] It should be noted that, in case of different vibration absorption environments, the specifications of the leaf spring 20 and the frequency-modulating pad 32 can be changed before installation according to different vibration environments, for example, the thickness of the leaf spring 20 can be increased or decreased, or the length of the frequency-modulating pad 32 in the extension direction of the leaf spring 20 can be increased or decreased to adjust its natural frequency. By replacing the frequency-modulating pad 32 of different lengths, the frequency of the vibration absorber can be adjusted, which can effectively adapt to the vibration environment of multiple frequencies or variable frequencies. By using the leaf spring 20 to provide stiffness for the vibrator, the adaptability of the vibration absorber to the vibration intensity can be improved, and the vibration reduction frequency band can be widened, which can effectively adapt to the vibration environment of multiple frequencies or variable frequencies and ensure the vibration reduction effect.

[0079] In some embodiments, the mass block 31 may be formed as follows: Figure 4 and Figure 7 See the structure shown. Figure 4 and Figure 7 Elastic pads 33 are respectively embedded at both ends of the mass block 31 along the vibration direction of the leaf spring 20. The provision of the elastic pads 33 can prevent the mass block 31 from having a hard contact with the inner wall of the housing 10 during the reciprocating movement of the mass block 31, thereby protecting the mass block 31 and the housing 10. At the same time, when the elastic pads 33 contact the inner wall of the housing 10, the vibration environment is bound to be more severe, and at this time, the elastic pads 33 can also eliminate part of the energy.

[0080] The elastic pad 33 may be a metal rubber or other block-shaped structure with a certain elasticity, and the elastic pad 33 may be embedded at both ends of the mass block 31. Correspondingly, both ends of the mass block 31 (such as the clamping blocks 311 or the cover plate 313 at both ends) may be provided with embedding grooves for the mass block 31 to be placed.

[0081] In some embodiments, the housing 10 may be Figure 2 See the structure shown. Figure 2 The housing 10 includes a cylinder 11 and an end cover 12. The cylinder 11 has a cylinder cavity. Two end covers 12 are provided, and the two end covers 12 are respectively connected to the two ends of the cylinder 11 to enclose the cylinder cavity to form a receiving cavity. The two end covers 12 are respectively fixedly connected to the two ends of the leaf spring 20.

[0082] The cylinder 11 may be a prismatic structure, and the size of the cylinder cavity needs to be larger than the size of the mass block 31 to ensure that the mass block 31 has a movable space in the cylinder cavity.

[0083] As a specific embodiment of the cylinder 11, the cylinder 11 may be a quadrangular prism-shaped structure, including two parallel top plates 111 and two parallel side plates 112, each of which is enclosed by each of the top plates 111 and the side plates 112 to form a quadrangular prism-shaped structure. In order to facilitate assembly and connection, a card slot may be provided on the two top plates 111 to card the two side plates 112. Figure 8 .

[0084] Specifically, the vibration direction of the leaf spring 20 is set as the first direction, and the direction perpendicular to the first direction and the length direction of the barrel cavity is set as the second direction. In the first direction, the end cover 12 is provided with a first connecting portion 121. In the second direction, the end cover 12 is provided with a second connecting portion 122. This structure can ensure the free combination of each vibration absorbing unit 100, or the vibration absorbing unit 100 is directly fixedly installed on the vibration platform 200.

[0085] Specifically, regarding the first connection portion 121 and the second connection portion 122, an inner groove may be provided on the outer plate surface of the end cover 12, and a plurality of connection holes for bolts or screws to pass through may be provided on the side wall of the inner groove. In addition, the connection between the end cover 12 and the cylinder body 11 may be bolted, and the connection between the leaf spring 20 and the end cover 12 may also be bolted.

[0086] In some embodiments, the housing 10 may be Figure 1 and Figure 3 See the structure shown. Figure 1 and Figure 3 The outer shell 10 is a rectangular parallelepiped structure, which can facilitate the free combination and superposition of the vibration absorbing units 100.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A combined dynamic vibration absorber based on leaf spring frequency modulation, characterized in that: It includes a plurality of vibration absorbing units which are fixedly installed separately or after being freely combined on a vibration platform; wherein, Each of the vibration absorbing units comprises: A housing having a receiving cavity; A leaf spring is arranged in the accommodating cavity, and two ends of the leaf spring are connected to the housing; The vibrator assembly is arranged in the accommodating cavity and fixed on the leaf spring. The vibrator assembly has a vibration compensation space for the leaf spring to penetrate.

2. The combined dynamic vibration absorber based on leaf spring frequency modulation according to claim 1, characterized in that: The leaf spring is provided with a; The vibrator assembly comprises: A mass block having a through cavity for the leaf spring to pass through, wherein the through cavity is the vibration compensation space; There are two frequency-modulating pads, each of which is arranged in the through cavity, and the two frequency-modulating pads are used to clamp and fix on the leaf spring.

3. The combined dynamic vibration absorber based on leaf spring frequency modulation according to claim 2, characterized in that: Each frequency tuning pad is located at a middle position of the leaf spring.

4. The combined dynamic vibration absorber based on leaf spring frequency modulation according to claim 2, characterized in that: Along the vibration direction of the leaf spring, elastic pads are respectively installed at both ends of the assembly formed by the two mass blocks.

5. The combined dynamic vibration absorber based on leaf spring frequency modulation according to claim 2, characterized in that: The housing comprises: A cylinder body having a cylinder cavity; Two end covers are provided, and the two end covers are respectively connected to the two ends of the cylinder body to enclose the cylinder cavity to form the accommodating cavity; the two end covers are respectively used to fix the two ends of the leaf spring; The vibration direction of the leaf spring is set as the first direction, and the direction perpendicular to the first direction and the length direction of the barrel cavity is set as the second direction; Wherein, in the first direction, the end cover is provided with a first connecting portion; in the second direction, the end cover is provided with a second connecting portion.

6. The combined dynamic vibration absorber based on leaf spring frequency modulation according to claim 1, characterized in that: At least two leaf springs are provided, and the leaf springs are arranged in parallel and at intervals; The vibrator assembly comprises: The mass block has a plurality of through cavities for the leaf springs to pass through respectively, and the through cavities are combined to form the vibration compensation space; There are multiple clamping structures, each of which is arranged in each of the through cavities; each of the clamping structures includes two frequency-modulating pads, and the two frequency-modulating pads are used to clamp and fix on the leaf spring in the corresponding through cavity.

7. The combined dynamic vibration absorber based on leaf spring frequency modulation according to claim 6, characterized in that: Each frequency tuning pad is located at a middle position of the corresponding leaf spring.

8. The combined dynamic vibration absorber based on leaf spring frequency modulation according to claim 6, characterized in that: Elastic pads are respectively embedded at two ends of the mass block along the vibration direction of the leaf spring.

9. The combined dynamic vibration absorber based on leaf spring frequency modulation according to claim 6, characterized in that: The housing comprises: A cylinder body having a cylinder cavity; Two end covers are provided, and the two end covers are respectively connected to the two ends of the cylinder body to enclose the cylinder cavity to form the accommodating cavity; the two end covers are respectively used to fix the two ends of the leaf spring; The vibration direction of each leaf spring is set as a first direction, and the direction perpendicular to the first direction and the length direction of the barrel cavity is set as a second direction; Wherein, in the first direction, the end cover is provided with a first connecting portion; in the second direction, the end cover is provided with a second connecting portion.

10. The combined dynamic vibration absorber based on leaf spring frequency modulation according to claim 1, characterized in that: The shell is a rectangular parallelepiped structure.

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