Combined dynamic vibration absorber based on a frequency modulation of a leaf spring

Abstract

The application provides a combined dynamic vibration absorber based on a leaf spring frequency modulation, comprising a plurality of vibration absorbing units which are respectively fixedly installed or fixedly installed after being freely combined on a vibration platform. Each vibration absorbing unit comprises a shell, a leaf spring and a vibrator assembly. The shell has a containing cavity. The leaf spring is arranged in the containing cavity, and two ends of the leaf spring are connected with the shell. The vibrator assembly is arranged in the containing cavity and is fixed on the leaf spring, and the vibrator assembly has a vibration compensation space for the leaf spring to penetrate. The combined dynamic vibration absorber based on the leaf spring frequency modulation can adjust the inherent frequency of the vibration absorber, has self-adaptability to the vibration intensity, widens the vibration reduction frequency band, and the unitized combined design can effectively adapt to a complex vibration environment with various frequencies and ensure the vibration reduction effect.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vibration absorption and damping, and particularly relates to a combined dynamic vibration absorber based on a leaf spring frequency modulation. BACKGROUND

[0002] In the engineering field, such as mechanical equipment, building structure and transportation, vibration problems are widespread and have a profound impact. Long-term vibration can 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. These devices usually have the advantages of simple structure, convenient maintenance and low cost. Among them, the vibration absorber is the most common passive control device, and the internal damping element usually uses a spring, so its damping effect is usually limited to a specific frequency range (linear) and is more dependent on a specific frequency. Therefore, in the face of multi-frequency or variable frequency (non-linear) vibration environment, the vibration absorber cannot effectively respond to the complex and variable vibration environment, resulting in poor damping effect. SUMMARY

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

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present application is to provide a combined dynamic vibration absorber based on a leaf spring frequency modulation, comprising a plurality of vibration absorption units fixedly installed or fixedly installed after being freely combined on a vibration platform; wherein,

[0006] Each of the vibration absorption units comprises:

[0007] a housing having a receiving cavity;

[0008] a leaf spring disposed in the receiving cavity, both ends of the leaf spring being connected to the housing;

[0009] a vibrator assembly disposed in the receiving cavity and fixedly arranged on the leaf spring, the vibrator assembly having a vibration compensation space for the leaf spring to pass through.

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

[0011] The vibrator assembly comprises:

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

[0013] The frequency modulation pads are provided with two, each of the frequency modulation pads is arranged in the through cavity, and the two frequency modulation pads are used for clamping and fixing on the leaf spring.

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

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

[0016] In a possible implementation, the shell comprises:

[0017] The barrel body has a barrel cavity;

[0018] The end covers are provided with two, and the two end covers are respectively connected with two ends of the barrel body to enclose the barrel cavity to form the accommodating cavity; and the two end covers are respectively fixedly connected with two ends of the leaf spring.

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

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

[0021] In a possible implementation, the leaf spring is provided with at least two, and each of the leaf springs is 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, and the through cavities are combined to form the vibration compensation space.

[0024] The clamping structures are provided with a plurality of, each of the clamping structures is arranged in the through cavity; each of the clamping structures comprises two frequency modulation pads, and the two frequency modulation pads are used for clamping and fixing on the leaf spring in the corresponding through cavity.

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

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

[0027] In a possible implementation, the shell comprises:

[0028] The barrel body has a barrel cavity;

[0029] The end cover is provided with two, two of which are connected with two ends of the barrel to form the accommodating cavity with the barrel cavity; two of the end cover are respectively fixedly connected with two ends of the leaf spring;

[0030] Wherein, the vibration direction of each 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 the second direction;

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

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

[0033] In the present implementation, a plurality of vibration absorbing units can be independently fixed and installed or combined and fixed on the vibration platform, which can be suitable for vibration reduction of different structures, and can also ensure flexible installation or installation in irregular or space-limited positions. Each vibration absorbing unit adopts a leaf spring to connect the vibrator, and both ends of the leaf spring are connected to the shell, which can effectively adapt to a vibration environment with multiple frequencies or changing frequencies, and can improve the adaptability of the vibration absorber to vibration intensity by using the leaf spring to provide stiffness for the vibrator, broaden the vibration reduction frequency band, and ensure the vibration reduction effect. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 The structure schematic view of the combined dynamic vibration absorber based on the leaf spring frequency modulation provided by the embodiment is shown in the figure.

[0035] Figure 2 The structure schematic view of the combined dynamic vibration absorber based on the leaf spring frequency modulation provided by the embodiment is shown in the figure.

[0036] Figure 3 The structure schematic view of the combined dynamic vibration absorber based on the leaf spring frequency modulation provided by the embodiment is shown in the figure. Figure 1 The cross-sectional structure schematic view of the combined dynamic vibration absorber based on the leaf spring frequency modulation provided by the embodiment is shown in the figure.

[0037] Figure 4 The cross-sectional structure schematic view of the combined dynamic vibration absorber based on the leaf spring frequency modulation provided by the embodiment is shown in the figure. Figure 2 The cross-sectional structure schematic view of the combined dynamic vibration absorber based on the leaf spring frequency modulation provided by the embodiment is shown in the figure.

[0038] Figure 5 The cross-sectional structure schematic view of the combined dynamic vibration absorber based on the leaf spring frequency modulation provided by the embodiment is shown in the figure. Figure 3 The enlarged structure schematic view of the combined dynamic vibration absorber based on the leaf spring frequency modulation provided by the embodiment is shown in the figure.

[0039] Figure 6 The cross-sectional structure schematic view of the combined dynamic vibration absorber based on the leaf spring frequency modulation provided by the embodiment is shown in the figure. Figure 3 The cross-sectional structure schematic view of the combined dynamic vibration absorber based on the leaf spring frequency modulation provided by the embodiment is shown in the figure.

[0040] Figure 7 For Figure 4 Another embodiment structure schematic diagram of the combined dynamic vibration absorber based on the leaf spring frequency modulation provided by the embodiment is provided.

[0041] Figure 8 For Figure 4 The C-C cross-sectional structure schematic diagram of the combined dynamic vibration absorber based on the leaf spring frequency modulation provided by the embodiment is provided.

[0042] Figure 9 The specific implementation structure schematic diagram of the combined dynamic vibration absorber based on the leaf spring frequency modulation provided by the embodiment one is provided.

[0043] Figure 10 The superimposed combined implementation structure schematic diagram of the combined dynamic vibration absorber based on the leaf spring frequency modulation provided by the embodiment one is provided.

[0044] Explanation of reference signs:

[0045] 100, vibration absorbing unit; 10, shell; 11, cylinder body; 111, top plate; 112, side plate; 12, end cover; 121, first connecting part; 122, second connecting part; 20, leaf spring; 30, vibrator assembly; 31, mass block; 311, clamping block; 312, intermediate 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-shaped part;

[0046] 200, vibration platform. DETAILED DESCRIPTION

[0047] In order to make the technical problems to be solved by the present application, the technical solutions and beneficial effects clearer and more apparent, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0048] Please refer to Figures 1 to 4 , the combined dynamic vibration absorber based on the leaf spring frequency modulation provided by the present application will be described. The combined dynamic vibration absorber based on the leaf spring frequency modulation comprises a plurality of vibration absorbing units 100 which are respectively fixedly installed or fixedly installed after being freely combined on a vibration platform 200. Each vibration absorbing unit 100 comprises a shell 10, a leaf spring 20 and a vibrator assembly 30. The shell 10 has a containing cavity. The leaf spring 20 is arranged in the containing cavity, and both ends of the leaf spring 20 are connected with the shell 10. The vibrator assembly 30 is arranged in the containing cavity and is fixedly arranged on the leaf spring 20, and the vibrator assembly 30 has a vibration compensation space 314 for the leaf spring 20 to penetrate.

[0049] Compared with the prior art, the multiple vibration absorbing units 100 can be respectively and independently fixed and installed or fixed and installed in combination on the vibration platform 200, can be applicable to vibration reduction of different structures, can also ensure flexible installation, or installation at irregular or space-limited positions. The reed 20 is used for connecting the vibrator in each vibration absorbing unit 100, and both ends of the reed 20 are connected to the shell 10, so that the vibration absorbing device can effectively adapt to a multi-frequency or variable-frequency vibration environment, the stiffness of the reed 20 is provided for the vibrator, the adaptability of the vibration absorbing device to vibration intensity is improved, the vibration reduction frequency band is widened, the vibration absorbing device can effectively adapt to a multi-frequency or variable-frequency vibration environment, and the vibration reduction effect is ensured.

[0050] In order to facilitate understanding, non-linear vibration is involved in the embodiment, and amplitude mutation may occur, which may be increased or decreased. Therefore, the two ends of the reed 20 are connected to the shell 10, so that the amplitude of the vibrator assembly 30 cannot be too large during the vibration process of the reed 20 dragged by the vibrator assembly 30 due to inertial force. This can effectively adapt to a severe vibration working environment.

[0051] Embodiment one: (the form of one reed 20)

[0052] In some embodiments, the above can adopt a structure as shown in Figure 3 . Referring to Figure 3 , the reed 20 is provided with one. The vibrator assembly 30 includes a mass block 31 and a frequency modulation pad block 32. The mass block 31 has a through cavity for the reed 20 to pass through, and the through cavity is a vibration compensation space 314. The frequency modulation pad block 32 is provided with two, and each frequency modulation pad block 32 is arranged in the through cavity. The two frequency modulation pad blocks 32 can be clamped and fixed on the reed 20.

[0053] The through cavity on the mass block 31 can ensure the passage of the reed 20. As for the through cavity, the two ends of the through cavity can be flared to form a horn shape, so as to avoid interference with the mass block 31 during reciprocating vibration of the mass block 31, and to ensure effective work of the reed 20.

[0054] The two frequency modulation pad blocks 32 clamp and fix the reed 20, and the two frequency modulation pad blocks 32 can be arranged on both sides of the plate surface of the reed 20, and each frequency modulation pad block 32 is provided with an abutting surface abutting against the reed 20, so that the two frequency modulation pad blocks 32 can stably clamp the reed 20.

[0055] In the embodiment, the two frequency modulation pad blocks 32 can adopt a tongue-and-groove butt joint structure to further limit the reed 20, which can be seen from Figure 6 .

[0056] As an embodiment of the mass 31 in the present embodiment, please refer to Figure 3 The mass 31 can include two clamping blocks 311 which are detachably connected by the bolt 342. Each clamping block 311 has a joint surface, and an open groove penetrating through both ends is arranged on the joint surface of each clamping block 311. After the two clamping blocks 311 are jointed, the two open grooves combine 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 also facilitate the replacement of the frequency modulation pad 32.

[0057] In the present embodiment, the mass 31 can have a cuboid shape.

[0058] In some embodiments, the frequency modulation pad 32 described above can have a structure as shown in Figure 3 Please refer to Figure 3 Each frequency modulation pad 32 is located at the middle position of the leaf spring 20, and this structure can ensure that the lengths of the leaf spring 20 on both sides of the frequency modulation pad 32 are the same, thereby ensuring the stability of the vibration of the mass 31 and the uniformity of the force received by the leaf spring 20.

[0059] It should be noted that different environments related to vibration absorption can replace the specifications of the leaf spring 20 and the frequency modulation pad 32 according to different vibration environments before installation, such as increasing or decreasing the thickness of the leaf spring 20, or increasing or decreasing the length of the frequency modulation pad 32 in the extension direction of the leaf spring 20, to adjust its natural frequency. By replacing frequency modulation pads 32 of different lengths, the frequency of the vibration absorber can be adjusted, which can effectively adapt to multi-frequency or variable frequency vibration environments, improve the adaptability of the vibration absorber to vibration intensity by using the leaf spring 20 as a vibrator, widen the vibration reduction frequency band, and effectively adapt to multi-frequency or variable frequency vibration environments to ensure the vibration reduction effect.

[0060] In some embodiments, the mass 31 described above can have a structure as shown in Figure 3 Please refer to Figure 3 Along the vibration direction of the leaf spring 20, the combination of the two masses 31 is respectively installed with an elastic pad 33 at both ends. The arrangement of the elastic pad 33 can avoid the hard contact between the mass 31 and the inner wall of the shell 10 during the reciprocating movement of the mass 31, thereby protecting the mass 31 and the shell 10. At the same time, when the elastic pad 33 contacts the inner wall of the shell 10, it is inevitable that the vibration environment is relatively severe, and at this time the elastic pad 33 can also eliminate part of the energy.

[0061] The elastic pad 33 can be a block-shaped structure made of metal rubber or other materials that can have a certain elasticity, and the elastic pad 33 can be embedded at both ends of the mass 31. Correspondingly, the mass 31 can be provided with an embedding groove at both ends for accommodating the mass 31.

[0062] In some embodiments, the housing 10 described above can adopt the structure as shown in Figure 1 Referring to Figure 1 , the housing 10 comprises a cylinder 11 and two end covers 12. The cylinder 11 has a cylinder cavity. The two end covers 12 are respectively connected to the two ends of the cylinder 11 to form an accommodation cavity with the cylinder cavity. The two end covers 12 are respectively fixedly connected to the two ends of the leaf spring 20.

[0063] The cylinder 11 can be a prismatic structure, and the size of the cylinder cavity needs to be larger than that 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 can be a quadrangular prism structure, comprising two parallel and spaced top plates 111 and two parallel and spaced side plates 112, and each top plate 111 and each side plate 112 form a quadrangular prism structure. In order to facilitate assembly and connection, a clamping groove can be provided on each top plate 111 to clamp the two side plates 112. Please refer to Figure 6 .

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

[0066] Specifically, regarding the first connecting part 121 and the second connecting part 122, a recess can be provided on the outer plate surface of the end cover 12, and a plurality of connecting holes for bolts 342 or screws are formed on the side wall of the recess. In addition, the connection between the end cover 12 and the cylinder 11 can be bolted, and the connection between the leaf spring 20 and the end cover 12 can also be bolted.

[0067] In some embodiments, the mass block 31 described above can adopt the structure as shown in Figure 5 Referring to Figure 5As an embodiment of the auxiliary frequency modulation pad 32, the vibrator assembly 30 can further include an adjusting structure 34, and the adjusting structure 34 is provided with two adjusting structures 34 located on both sides of the frequency modulation pad 32 along the extension direction of the leaf spring 20. Each adjusting structure 34 includes a moving block 341 and an adjusting bolt 342. The moving block 341 is provided with two moving blocks 341 located on both sides of the leaf spring 20 along the normal direction of the leaf spring 20, and each moving block 341 is in sliding connection with a sliding cavity provided in the mass block 31 and communicating with the through cavity. Each moving block 341 is provided with an arc-shaped portion 343 near the end of the leaf spring 20, and the arc-shaped portion 343 is provided near the opening of the through cavity, and the axis is perpendicular to the extension direction of the through cavity. The bolt 342 is provided with two bolts 342 corresponding to the two moving blocks 341, and each bolt 342 is in rotational connection (axial non-movable limiting rotational connection, such as a thrust bearing) with the corresponding mass block 31 and in threaded connection with the moving block 341, and can drive the moving block 341 to move close to the leaf spring 20. In each adjusting structure 34, the relative movement of the two moving blocks 341 and the clamping of the leaf spring 20 can be adjusted by the two bolts 342, which can reduce the effective length of the leaf spring 20, and thus convenient adjustment can be achieved.

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

[0069] In some embodiments, the above-mentioned vibrator assembly 30 can adopt a structure as shown in Figure 4 . Referring to Figure 4 , the leaf spring 20 is provided with at least two leaf springs 20, and each leaf spring 20 is arranged in parallel and spaced apart.

[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 forms a vibration compensation space 314 in combination. The clamping structure is provided with a plurality of clamping structures, and each clamping structure is arranged in each through cavity. Each clamping structure includes two frequency modulation pads 32, and the two frequency modulation pads 32 can clamp and fix the leaf spring 20 in the corresponding through cavity.

[0071] The through cavities on the mass block 31 can ensure the passage of the leaf spring 20, and the spacing direction of each through cavity is parallel to the normal direction of each leaf spring 20. As for the through cavity, the two ends of the through cavity can be flared to form a horn shape, so as to avoid interference with the mass block 31 during reciprocating vibration of the mass block 31, and thus ensure the effective work of the leaf spring 20. The superposition of a plurality of leaf springs 20 can ensure the adjustment of the natural frequency, and thus ensure the adaptation to the vibration platform 200 with large vibration.

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

[0073] In the embodiment, the two frequency adjustment pads 32 can adopt a tongue-and-groove butt joint structure to further limit the leaf spring 20, which can be seen from Figure 7 .

[0074] As an embodiment of the mass block 31 in the embodiment, the mass block 31 can include a plurality of clamping blocks 311 detachably connected by bolts 342, and each clamping block 311 can be stacked. Figure 7 Each clamping block 311 (except the clamping blocks 311 at both ends) has two abutting surfaces, and an open groove penetrating both ends is arranged on each abutting surface of each clamping block 311. After the two clamping blocks 311 are stacked and abutted, the two open grooves combine to form a receiving cavity. Of course, the clamping blocks 311 at both ends only have one abutting surface. This structure can facilitate the fixed installation of the leaf spring 20 and the frequency adjustment pad 32, and also facilitates the replacement of the frequency adjustment pad 32.

[0075] As another specific embodiment of the mass block 31 in the embodiment, when referring to Figure 4 When the leaf spring 20 is provided with only two, the mass block 31 includes a middle block 312 and a cover plate 313. The middle block 312 has two parallel end faces, and an open groove penetrating both ends is arranged on each end face. The cover plate 313 is provided with two, and the two cover plates 313 can be respectively buckled on the two open grooves and fixed by bolts 342. Each cover plate 313 forms a through cavity after being buckled on the open groove.

[0076] In the embodiment, the mass block 31 can have a cuboid shape.

[0077] In some embodiments, the above-mentioned frequency adjustment pad 32 can adopt the structure as shown in Figure 4 and Figure 7 Referring to Figure 4 and Figure 7 , each frequency adjustment pad 32 is located at the middle position of the corresponding leaf spring 20, which can ensure that the lengths of the leaf springs 20 on both sides of the frequency adjustment pad 32 are the same, thereby ensuring the stability of the vibration of the mass block 31 and the uniformity of the force received by the leaf spring 20.

[0078] It needs to be explained that different environments related to vibration absorption, the specification of the leaf spring 20 and the specification of the frequency adjustment pad 32 can be replaced before installation according to different vibration environments, for example, increasing or decreasing the thickness of the leaf spring 20, or increasing or decreasing the length of the frequency adjustment pad 32 in the extension direction of the leaf spring 20, to adjust its natural frequency. By replacing the frequency adjustment 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 changing frequencies. The stiffness of the leaf spring 20 as the vibrator can improve the adaptability of the vibration absorber to the vibration intensity, widen the vibration frequency band, and effectively adapt to the vibration environment of multiple frequencies or changing frequencies, ensuring the vibration reduction effect.

[0079] In some embodiments, the mass block 31 described above can adopt the structure as shown in Figure 4 and Figure 7 . Referring to Figure 4 and Figure 7 , along the vibration direction of the leaf spring 20, elastic pads 33 are embedded at both ends of the mass block 31. The arrangement of the elastic pads 33 can avoid hard contact between the mass block 31 and the inner wall of the shell 10 during reciprocating movement, protecting the mass block 31 and the shell 10. At the same time, when the elastic pads 33 contact the inner wall of the shell 10, it is inevitable that the vibration environment is more severe, at which time the elastic pads 33 can also eliminate a part of energy.

[0080] The elastic pad 33 can be a metal rubber or other block structure that can have a certain elasticity, and the elastic pad 33 can 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 plates 313 at both ends) can be provided with embedding grooves for the mass block 31 to be seated.

[0081] In some embodiments, the shell 10 described above can adopt the structure as shown in Figure 2 . Referring to Figure 2 , the shell 10 includes a cylinder body 11 and end covers 12. The cylinder body 11 has a cylinder cavity. The end covers 12 are provided in two, and the two end covers 12 are respectively connected with both ends of the cylinder body 11 to form an accommodation cavity with the cylinder cavity. The two end covers 12 are respectively fixedly connected with both ends of the leaf spring 20.

[0082] The cylinder body 11 can be a prismatic outer shape 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 barrel 11, the barrel 11 can be a quadrangular prism-shaped structure, including two parallel and spaced top plates 111 and two parallel and spaced side plates 112, each top plate 111 and each side plate 112 enclosing a quadrangular prism-shaped structure. In order to facilitate assembly and connection, a clamping groove can be provided on the two top plates 111 to clamp the two side plates 112. For details, see 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 part 121. In the second direction, the end cover 12 is provided with a second connecting part 122. This structure can ensure the free combination of each vibration absorbing unit 100, or the vibration absorbing unit 100 is directly fixed and installed on the vibration platform 200.

[0085] Specifically, regarding the first connecting part 121 and the second connecting part 122, a recess can be provided on the outer plate surface of the end cover 12, and a plurality of connecting holes for bolts or screws are provided on the side wall of the recess. In addition, the connection between the end cover 12 and the barrel 11 can be bolted, and the connection between the leaf spring 20 and the end cover 12 can also be bolted.

[0086] In some embodiments, the above-mentioned shell 10 can adopt the structure as shown in Figure 1 and Figure 3 . Referring to Figure 1 and Figure 3 , the shell 10 is a cuboid-shaped structure, which can facilitate the free combination and stacking of each vibration absorbing unit 100.

[0087] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A combined dynamic vibration absorber based on a frequency tuning of a leaf spring, characterized in that, The vibration absorbing unit comprises a plurality of vibration absorbing units fixedly installed on a vibration platform respectively or after being freely combined. Each vibration absorbing unit comprises: a shell having a receiving cavity; a leaf spring arranged in the receiving cavity, two ends of the leaf spring being connected with the shell; a vibrator assembly arranged in the receiving cavity and fixed on the leaf spring, the vibrator assembly having a vibration compensation space for the leaf spring to pass through; the vibrator assembly comprises a mass block and a clamping structure; the mass block has a through cavity for the leaf spring to pass through, the through cavity being the vibration compensation space; two ends of the through cavity are flared to form a horn shape; the clamping structure is arranged in the through cavity; the clamping structure comprises two frequency adjustment pads; each frequency adjustment pad is located at a middle position of the leaf spring; the two frequency adjustment pads are used to clamp and fix the leaf spring in the corresponding through cavity.

2. The combination of a reed frequency modulated dynamic vibration absorber as claimed in claim 1, characterized in that The leaf spring is provided with one.

3. The combination of a reed frequency modulated dynamic vibration absorber as claimed in claim 2, characterized in that Along the vibration direction of the leaf spring, the two mass blocks form a combination body, and elastic pads are respectively arranged at two ends of the combination body.

4. The combination of a reed frequency modulated dynamic vibration absorber as claimed in claim 2, wherein, The shell comprises: a cylinder body having a cylinder cavity; two end covers, the two end covers being respectively connected with two ends of the cylinder body to enclose the cylinder cavity to form the receiving cavity, and the two end covers being respectively used for fixedly connecting two ends of the leaf spring; wherein, the vibration direction of the leaf spring is set as a first direction, and a direction perpendicular to the first direction and the length direction of the cylinder 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.

5. The combination of a reed frequency modulated dynamic vibration absorber as defined in claim 1, wherein, The leaf spring is provided with at least two leaf springs, and each leaf spring is arranged in parallel and at intervals; the mass block has a plurality of through cavities for each leaf spring to pass through; The clamping structure is provided with a plurality of clamping structures, and each clamping structure is arranged in each through cavity.

6. The combination of a reed frequency modulated dynamic vibration absorber as claimed in claim 5, characterized in that Along the vibration direction of the leaf spring, elastic pads are respectively arranged at two ends of the mass block.

7. The combination of a reed frequency modulated dynamic vibration absorber as claimed in claim 5, wherein, The shell comprises: a cylinder body having a cylinder cavity; two end covers, the two end covers being respectively connected with two ends of the cylinder body to enclose the cylinder cavity to form the receiving cavity, and the two end covers being respectively used for fixedly connecting two ends of the leaf spring; wherein, the vibration direction of each leaf spring is set as a first direction, and a direction perpendicular to the first direction and the length direction of the cylinder 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.

8. The combination of a reed frequency modulated dynamic vibration absorber as defined in claim 1, wherein, The shell has a cuboid shape.

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