CN209943403U - Dynamic vibration absorber with adjustable rigidity - Google Patents
Dynamic vibration absorber with adjustable rigidity Download PDFInfo
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- CN209943403U CN209943403U CN201920532866.5U CN201920532866U CN209943403U CN 209943403 U CN209943403 U CN 209943403U CN 201920532866 U CN201920532866 U CN 201920532866U CN 209943403 U CN209943403 U CN 209943403U
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Abstract
The utility model provides a dynamic vibration absorber with adjustable rigidity, which comprises a mass block, an elastic block, a fastening component and an adjusting piece, wherein the elastic block is arranged at one end of the mass block and is provided with a first cavity which is communicated along the compression direction; the fastening component is connected with the elastic block and is used for compressing the elastic block and limiting the rebound of the compressed elastic block; one end of the adjusting piece penetrates through the first cavity and is detachably connected with the mass block, and the other end of the adjusting piece is positioned in the first cavity or extends out of the first cavity and is detachably connected with the fastening assembly and used for limiting the compression thickness of the fastening assembly for compressing the elastic block; when in use, the compression thickness of the elastic block is changed by replacing or changing the length of the adjusting piece. The utility model discloses rigidity adjustable dynamic vibration absorber as long as can change the rigidity of elastic block through the length of changing or changing the regulating part to make dynamic vibration absorber inhale the frequency adjustable, the debugging cycle is short, the debugging mode is simple, with low costs.
Description
Technical Field
The utility model belongs to the technical field of the bump leveller, more specifically say, relate to a rigidity adjustable dynamic bump leveller.
Background
For a conservative system without energy consumption, the vibration will continue with the conversion of kinetic and potential energy. For non-conservative systems where there is energy dissipation, the amplitude of the vibration is damped. The dynamic vibration absorber is composed of 3 elements of mass, spring and damping, and an additional dynamic system is formed outside the vibration-damping object, and the resonance system formed by the mass and the spring absorbs the vibration of the vibration-damping object to be amplified and is consumed in the damping element.
For the automobile with larger vibration in the later development stage, the dynamic vibration absorber is selected to treat the vibration noise problem, and the automobile vibration absorber has the advantages of simple structure, convenience in operation, reliability in work, convenience in installation, low cost and the like. The existing dynamic vibration absorbers mainly adjust the natural frequency (i.e., the vibration absorption frequency) by changing the mass (adjusting the weight of the mass) and/or changing the stiffness (adjusting the performance parameters of the elastic block, such as the compression thickness, diameter, elastic modulus, hardness, shape, etc.).
For the mode of adjusting the rigidity by adjusting the performance parameters of the elastic block and realizing the adjustment of the vibration absorption frequency, a sample piece needs to be manufactured again for each debugging of the vibration absorption frequency, and the debugging period and the cost are high; to the mode of realizing the frequency adjustment that shakes through adjusting the mass size of quality piece, need carry out the processing once more to the quality piece, increased the debugging cost, two kinds of adjustment modes can't quick effectual matching whole car NVH problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a rigidity adjustable dynamic vibration absorber aims at solving the technical problem that the frequency debugging cycle length and with high costs of inhaling of the adjustment dynamic vibration absorber that exists among the prior art.
In order to achieve the above object, the utility model adopts the following technical scheme: provided is a stiffness-adjustable dynamic vibration absorber, comprising:
a mass block;
the elastic block is arranged at one end of the mass block and is provided with a first cavity penetrating along the compression direction;
the fastening assembly is connected with the elastic block and is used for compressing the elastic block and limiting the rebound of the compressed elastic block;
the adjusting piece is used for limiting the compression thickness of the fastening assembly for compressing the elastic block;
in use, the compressed thickness of the resilient block is changed by replacing or changing the length of the adjustment member.
Furthermore, the dynamic vibration absorber with adjustable rigidity further comprises a pressure plate arranged at one end of the elastic block, the other end of the elastic block is arranged on the mass block, and the pressure plate is connected with the end part of the adjusting piece, which is positioned in the first cavity or extends out of the first cavity;
the fastening component is connected with the pressure plate, and the elastic block is compressed through the pressure plate.
Furthermore, one side of the pressing plate, which is connected with the elastic block, is provided with a limiting groove, and one end of the adjusting piece extends out of the first cavity and is limited in the limiting groove.
Furthermore, two ends of the mass block are respectively provided with one elastic block; the mass block is provided with a second cavity which is communicated along the compression direction of the elastic block, and the second cavity is communicated with the first cavity;
one end of the adjusting piece is positioned in or penetrates through the first cavity of one of the elastic blocks, and the other end of the adjusting piece penetrates through the second cavity and is positioned in or penetrates through the first cavity of the other elastic block.
Furthermore, two ends of the mass block are respectively provided with a connecting plate, and the mass block is connected with the elastic block through the connecting plates.
Further, the adjusting piece is of a tubular structure; the fastening assembly comprises a bolt and a nut, wherein the bolt penetrates through one of the pressure plate, the adjusting piece and the other pressure plate in sequence, and the nut is connected with the bolt.
Further, the nut of the bolt is located at one end of one of the pressure plates, and the nut is located at one end of the other pressure plate.
Further, the elastic block is of a cylindrical structure.
Further, the mass block is of a cylindrical structure.
The utility model provides a rigidity adjustable dynamic vibration absorber's beneficial effect lies in: the elastic block is compressed by the fastening component, the thickness of the compressed elastic block is limited by the adjusting piece, different compression thicknesses of the elastic block correspond to different rigidities of the elastic block, namely, the rigidity of the elastic block can be limited by the adjusting piece, the adjusting pieces with different lengths correspond to different rigidities of the elastic block, and when the vibration absorption frequency is adjusted, the rigidity of the elastic block can be changed by replacing the adjusting pieces with different lengths or changing the length of the same adjusting piece, so that the vibration absorption frequency is changed, and the vibration absorption frequency of the dynamic vibration absorber is adjustable. Compared with the prior art, the utility model discloses rigidity adjustable dynamic vibration absorber as long as the length through changing or changing the regulating part can change the rigidity of elasticity piece to make dynamic vibration absorber inhale the vibration frequency adjustable, the debugging cycle is short, the debugging mode is simple, with low costs.
Drawings
Fig. 1 is a schematic structural diagram of a dynamic vibration absorber with adjustable stiffness according to an embodiment of the present invention;
fig. 2 is a view a-a of fig. 1.
In the figure: 10. a mass block; 11. a second cavity; 20. an elastic block; 21. a first cavity; 30. a fastening assembly; 31. a bolt; 32. a nut; 40. an adjustment member; 50. pressing a plate; 60. a connecting plate.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and fig. 2, a description will now be given of the stiffness-adjustable dynamic vibration absorber according to the present invention. The dynamic vibration absorber with adjustable rigidity comprises a mass block 10, an elastic block 20, a fastening assembly 30 and an adjusting piece 40. The elastic block 20 is disposed at one end of the mass 10 and has a first cavity 21 penetrating in a compression direction. The fastening assembly 30 is coupled to the elastic block 20 for compressing the elastic block 20 and restricting the compressed elastic block 20 from rebounding. The adjusting member 40 has one end passing through the first cavity 21 and detachably connected to the mass 10 and the other end located in the first cavity 21 or extending out of the first cavity 21 and connected to the fastening assembly 30 for limiting the compression thickness of the fastening assembly 30 for compressing the elastic block 20, and the compression thickness of the elastic block 20 is changed by replacing or changing the length of the adjusting member 40 during adjustment.
The utility model provides a rigidity adjustable dynamic vibration absorber, elastic block 20 are the block rubber, and the rigidity of block rubber is relevant with factors such as compression thickness, diameter, elastic modulus, hardness and the shape of block rubber, changes one of them parameter and can change rigidity, and this embodiment adopts the compression thickness that changes the block rubber in order to change the form of rigidity, and is specific, and the compression thickness numerical value accessible computational formula among the prior art that different rigidity corresponds reachs.
The utility model provides a rigidity adjustable dynamic vibration absorber, elastic block 20 are compressed by fastening component 30, and the compression thickness of elastic block 20 is injectd by regulating part 40, and the different rigidity that elastic block 20 is different is corresponded to the different compression thickness of elastic block 20, that is to say, and the rigidity of elastic block 20 can be injectd to regulating part 40, and the regulating part 40 of different length corresponds the different rigidity of elastic block 20, and the different vibration absorption frequency of different rigidity correspondence of elastic block 20. When the vibration absorption frequency of the dynamic vibration absorber is adjusted, the rigidity of the elastic block 20 can be changed by replacing the adjusting pieces 40 with different lengths or changing the length of the same adjusting piece 40, so that the vibration absorption frequency is changed, and the vibration absorption frequency of the dynamic vibration absorber is adjusted. Compared with the prior art, the utility model discloses rigidity adjustable dynamic vibration absorber as long as can change the rigidity of elastic block 20 through the length of changing or changing regulating part 40 to make dynamic vibration absorber's the frequency of shaking out adjustable, the debugging cycle is short, the debugging mode is simple, with low costs.
Fastening component 30 is used for compressing elastic block 20, and each position atress is even when making elastic block 20 pressurized, as the utility model provides a concrete implementation of rigidity adjustable dynamic vibration absorber, this rigidity adjustable dynamic vibration absorber still include clamp plate 50, and the one end of elastic block 20 is fixed on quality piece 10, and the other end is equipped with above-mentioned clamp plate 50, specifically, clamp plate 50 covers on the terminal surface of elastic block 20. The fastening assembly 30 is connected to the pressing plate 50, and the elastic block 20 is compressed by the pressing plate 50. In addition, the pressure plate 50 is also connected to the end of the adjusting member 40 located in the first cavity 21 or extending out of the first cavity 21, see fig. 2. The elastic block 20 is pressed down by the pressing force of the fastening assembly 30 until the pressing plate 50 comes into contact with the end of the adjusting member 40.
The end of the elastic block 20 is provided with a pressing plate 50, so that on one hand, all parts of the elastic block 20 are stressed uniformly when compressed, and cannot rebound after being compressed, and the consistent natural frequency in the compressed state is ensured. More importantly, the pressure plate 50 is connected to the adjusting member 40, so as to precisely control the compression thickness of the elastic block 20, i.e. the stiffness of the elastic block 20, and thus the vibration absorption frequency of the dynamic vibration absorber.
In order to further precisely control the compression thickness of the elastic block 20, it is required that the adjusting element 40 in the first cavity 21 cannot move after the elastic block 20 is compressed, and in order to achieve the above purpose, on the basis of the above embodiment, a limiting groove is provided on the surface of the pressing plate 50 connected with the elastic block 20, and one end of the adjusting element 40 extends out of the first cavity 21 and is limited in the limiting groove, see fig. 2. Before the elastic block 20 is compressed, the adjusting piece 40 is located in the first cavity 21, after the elastic block 20 is compressed by the fastening component 30, one end of the adjusting piece 40 is clamped with the limiting groove, and the limiting groove limits the adjusting piece 40 to move radially, so that the problem that the vibration absorption frequency is influenced due to the fact that the adjusting piece 40 moves to change the compression thickness of the elastic block 20 can be avoided.
Referring to fig. 1 or fig. 2, as a specific embodiment of the stiffness-adjustable dynamic vibration absorber provided by the present invention, two elastic blocks 20 are provided, and are respectively located at two ends of the mass block 10. The two elastic blocks 20 are provided, so that the stiffness adjustment range of the dynamic vibration absorber is wider, and the vibration absorption frequency range of the dynamic vibration absorber is wider.
Due to the arrangement of the two elastic blocks 20, in order to meet the assembly requirements of the adjusting piece 40 and the fastening assembly 30 with the mass block 10 and the two elastic blocks 20, the mass block 10 is provided with the second cavity 11 which penetrates along the compression direction of the elastic blocks 20, and the second cavity 11 is communicated with the first cavity 21. One end of the adjusting member 40 is located in the first cavity 21 of one of the elastic blocks 20 or passes through the first cavity 21, and the other end passes through the second cavity 11 and is located in the first cavity 21 of the other elastic block 20 or passes through the first cavity 21. The adjusting element 40 and the two elastic blocks 20 are symmetrically distributed along the center line of the mass block 10 in the height direction, see fig. 1 or fig. 2.
The middle part of the adjusting member 40 is located in the second cavity 11, the inner diameter of the second cavity 11 is larger than the outer diameter of the adjusting member 40, and after the fastening assembly 30 releases the compression of the elastic block 20 and is detached from the elastic block 20, the adjusting member 40 can freely move in the second cavity 11, so as to realize the detachable connection with the mass block 10, and further complete the replacement of the adjusting members 40 with different lengths.
Two ends of the mass 10 need to be fixed to the elastic block 20, and in order to facilitate the assembly of the mass 10 and the elastic block 20, on the basis of the above embodiments, two ends of the mass 10 are respectively provided with the connecting plates 60, and the mass 10 is connected to the elastic block 20 through the connecting plates 60. Specifically, the connecting plate 60 is embedded in the mass 10, and one end surface of the elastic block 20 abuts against an end surface of the connecting plate 60, see fig. 2.
This dynamic vibration absorber adjusts the vibration absorbing frequency through changing the compression thickness of elastic mass 20, and the compression thickness of elastic mass 20 is limited by the length of regulating part 40, changes the regulating part 40 of different length, can change the compression thickness of elastic mass 20, if want to change regulating part 40, need fastening assembly 30 and regulating part 40 can dismantle the connection, further also need to dismantle the connection with quality piece 10, elastic mass 20, in order to realize above-mentioned purpose, as the utility model provides a specific implementation of the dynamic vibration absorber with adjustable rigidity, regulating part 40 is the tubular structure; the fastening assembly 30 includes a bolt 31 passing through one of the pressing plates 50, the adjusting member 40 and the other pressing plate 50 in sequence, and a nut 32 connected to the bolt 31, see fig. 1 and 2.
The elastic block 20, the mass block 10 and the adjusting piece 40 are connected into a whole by using the bolt 31 and the nut 32, the connection mode is simple, the fastening performance is good, meanwhile, the disassembly is convenient, the elastic block 20 can be compressed, and the elastic block 20 after being compressed can not rebound.
Specifically, the nut of the bolt 31 is located at one end of one of the pressure plates 50, and the nut 32 is located at one end of the other pressure plate 50.
In order to make the elastic block 20 and the mass block 10 easy to manufacture and form, as a specific embodiment of the stiffness-adjustable dynamic vibration absorber provided by the present invention, the elastic block 20 and the mass block 10 are both cylindrical structures, please refer to fig. 1, and the diameter of the elastic block 20 is smaller than that of the mass block 10. The elastic block 20, the mass block 10, the adjusting piece 40 and the bolt 31 are coaxially arranged, so that the assembly and the disassembly are convenient.
The utility model provides an assembly process of rigidity adjustable dynamic vibration absorber as follows: the adjusting piece 40 penetrates into the second cavity 11, two ends of the adjusting piece 40 respectively extend out of the second cavity 11, then the elastic blocks 20 are pressed on two ends of the adjusting piece 40, one end of the bolt 31 sequentially penetrates through one of the pressing plates 50, the adjusting piece 40 and the other pressing plate 50, the nut 32 is screwed on the penetrating end, and finally the bolt 31 is screwed until two ends of the adjusting piece 40 are respectively embedded into the limiting grooves of the pressing plates 50. During disassembly, the bolts 31 are loosened, and the parts are disassembled according to the reverse process.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The dynamic vibration absorber with adjustable rigidity is characterized by comprising:
a mass block;
the elastic block is arranged at one end of the mass block and is provided with a first cavity penetrating along the compression direction;
the fastening assembly is connected with the elastic block and is used for compressing the elastic block and limiting the rebound of the compressed elastic block;
the adjusting piece is used for limiting the compression thickness of the fastening assembly for compressing the elastic block;
during adjustment, the compressed thickness of the elastic block is changed by replacing or changing the length of the adjusting piece.
2. The adjustable stiffness dynamic vibration absorber of claim 1 further comprising a pressure plate disposed at one end of the mass, the other end of the mass being disposed on the mass, the pressure plate being attached to the end of the tuning element that is located in or extends out of the first cavity;
the fastening component is connected with the pressure plate, and the elastic block is compressed through the pressure plate.
3. The stiffness-adjustable dynamic vibration absorber according to claim 2, wherein a limiting groove is formed on a surface of the pressure plate connected to the elastic block, and one end of the adjusting member extends out of the first cavity and is limited in the limiting groove.
4. The stiffness-adjustable dynamic vibration absorber according to claim 2 or 3, wherein one of said elastic blocks is provided at each of both ends of said mass block; the mass block is provided with a second cavity which is communicated along the compression direction of the elastic block, and the second cavity is communicated with the first cavity;
one end of the adjusting piece is positioned in or penetrates through the first cavity of one of the elastic blocks, and the other end of the adjusting piece penetrates through the second cavity and is positioned in or penetrates through the first cavity of the other elastic block.
5. The stiffness-adjustable dynamic vibration absorber according to claim 4, wherein the mass is provided with connecting plates at both ends thereof, and the mass is connected to the elastic block through the connecting plates.
6. The adjustable stiffness dynamic vibration absorber of claim 4 wherein said tuning member is a tubular structure; the fastening assembly comprises a bolt and a nut, wherein the bolt penetrates through one of the pressure plate, the adjusting piece and the other pressure plate in sequence, and the nut is connected with the bolt.
7. The adjustable stiffness dynamic vibration absorber of claim 6 wherein said nut of said bolt is located at one end of one of said pressure plates and said nut is located at one end of the other of said pressure plates.
8. The adjustable stiffness dynamic vibration absorber of claim 4 wherein said elastic mass is a cylindrical structure.
9. The adjustable stiffness dynamic vibration absorber of claim 1 wherein said mass is a cylindrical structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920532866.5U CN209943403U (en) | 2019-04-18 | 2019-04-18 | Dynamic vibration absorber with adjustable rigidity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920532866.5U CN209943403U (en) | 2019-04-18 | 2019-04-18 | Dynamic vibration absorber with adjustable rigidity |
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| CN209943403U true CN209943403U (en) | 2020-01-14 |
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| CN201920532866.5U Active CN209943403U (en) | 2019-04-18 | 2019-04-18 | Dynamic vibration absorber with adjustable rigidity |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111516606A (en) * | 2020-04-28 | 2020-08-11 | 重庆长安汽车股份有限公司 | Vibration absorber mounting structure for front auxiliary frame of automobile |
| CN111561535A (en) * | 2020-04-26 | 2020-08-21 | 东风汽车集团有限公司 | Power vibration absorber with stepless adjustable frequency |
| CN111810567A (en) * | 2020-06-24 | 2020-10-23 | 北京工业大学 | Variable-damping and mass and rigidity adjustable shock absorber and rigidity quantitative adjusting method |
| CN114962546A (en) * | 2022-06-09 | 2022-08-30 | 北京汽车集团越野车有限公司 | Frequency-adjustable rear axle vertical vibration absorption assembly, automobile, method and device |
| CN115355639A (en) * | 2022-08-11 | 2022-11-18 | 海信冰箱有限公司 | Refrigerator and vibration adjusting method of compressor |
-
2019
- 2019-04-18 CN CN201920532866.5U patent/CN209943403U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111561535A (en) * | 2020-04-26 | 2020-08-21 | 东风汽车集团有限公司 | Power vibration absorber with stepless adjustable frequency |
| CN111561535B (en) * | 2020-04-26 | 2021-11-12 | 东风汽车集团有限公司 | Power vibration absorber with stepless adjustable frequency |
| CN111516606A (en) * | 2020-04-28 | 2020-08-11 | 重庆长安汽车股份有限公司 | Vibration absorber mounting structure for front auxiliary frame of automobile |
| CN111810567A (en) * | 2020-06-24 | 2020-10-23 | 北京工业大学 | Variable-damping and mass and rigidity adjustable shock absorber and rigidity quantitative adjusting method |
| CN111810567B (en) * | 2020-06-24 | 2022-02-08 | 北京工业大学 | Variable-damping and mass and rigidity adjustable shock absorber and rigidity quantitative adjusting method |
| CN114962546A (en) * | 2022-06-09 | 2022-08-30 | 北京汽车集团越野车有限公司 | Frequency-adjustable rear axle vertical vibration absorption assembly, automobile, method and device |
| CN115355639A (en) * | 2022-08-11 | 2022-11-18 | 海信冰箱有限公司 | Refrigerator and vibration adjusting method of compressor |
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