CN203335704U - Stiffness-adjustable power vibration absorber - Google Patents
Stiffness-adjustable power vibration absorber Download PDFInfo
- Publication number
- CN203335704U CN203335704U CN2013203016303U CN201320301630U CN203335704U CN 203335704 U CN203335704 U CN 203335704U CN 2013203016303 U CN2013203016303 U CN 2013203016303U CN 201320301630 U CN201320301630 U CN 201320301630U CN 203335704 U CN203335704 U CN 203335704U
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- China
- Prior art keywords
- spring
- mass block
- vibration absorber
- stiffness
- base
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model discloses a stiffness-adjustable power vibration absorber. The stiffness-adjustable power vibration absorber comprises a mass block, a base and a first spring, wherein the mass block and the base are at intervals up and down, and the first spring is located between the base and the mass block. A pressing cavity is arranged at the position of the mass block corresponding to the upper portion of the first spring and extends upwards to the top of the mass block, a nonlinear second spring is limited in the pressing cavity, and the top of the second spring is fixedly connected with a pressing device limited by the pressing cavity and used for changing stiffness of the second spring. The extending length of the nonlinear second spring can be adjusted through the pressing device so as to change stiffness of the second spring, vibration excitation of different frequencies is eliminated, and the stiffness-adjustable power vibration absorber has the advantages of being simple in structure, small in size and low in cost. The stiffness-adjustable power vibration absorber is applied to the field of vehicles and serves as a vibration absorbing device.
Description
Technical field
The utility model relates to a kind of dynamic vibration absorber, is specifically related to the adjustable dynamic vibration absorber of a kind of rigidity.
Background technique
The vibrational energy that dynamic vibration absorber utilizes resonator system to absorb object, to reduce object vibration, is damping control device commonly used, is widely used in the technical fields such as automobile, boats and ships, ocean working platform, Loads of Long-span Bridges.Take automotive field as example, and dynamic vibration absorber is being brought into play irreplaceable effect on active noise reduction and damping technology.
At present, the elastomer of most bump leveller is single rubber product, only can eliminate the vibrational excitation of single-frequency, little for the vibrational excitation shock attenuation result of Frequency, and after the long-time use of rubber, rigidity can change, and shock attenuation result disappears.And the adjustable bump leveller complex structure of most of frequency, cost is higher.
The model utility content
For solving the above deficiency existed in prior art, the utility model provides a kind of rigidity adjustable dynamic vibration absorber, can regulate the collapsing length of nonlinear the second spring to change its rigidity by press device, and then the vibrational excitation of elimination different frequency, there are characteristics simple in structure, that volume is little, with low cost.
For achieving the above object, the technological scheme that the utility model adopts is as follows:
The dynamic vibration absorber that a kind of rigidity is adjustable, comprise mass block and the base of being separated by up and down and arranging, and be positioned the first spring between base and mass block, be provided with and press chamber corresponding to the position above the first spring on described mass block, press chamber and extend upwardly to the mass block top, pressing spacingly in chamber has nonlinear the second spring, and the top of the second spring connects firmly by pressing chamber spacing and for changing the press device of the second spring rate.
As to restriction of the present utility model, on mass block, corresponding to the position below the second spring, be provided with tapped hole; Described press device is bolt, and the screw rod position of bolt is through the second spring and tapped hole be set in the first spring, and the length at screw rod position is less than the complete vertical distance between its top to base bottom when compressed of the second spring; The radial dimension of bolt head is greater than the diameter of the second spring.
As another kind of the present utility model is limited, described the first spring and the second spring coaxial line arrange.
The utility model also has a kind of restriction, and described the first spring, the second spring, press device are provided with equably four groups between mass block and base.
Owing to having adopted technique scheme, compared with prior art, obtained technological progress is the utility model:
By set up nonlinear the first spring in mass block, make the complex stiffness K of two springs in each group
0with the first spring rate K
1with the second spring rate K
2pass be: K
0=K
1k
2/ (K
1+ K
2), and because the first spring, the second spring evenly are provided with four, decoupling zero each other, system global stiffness K=4K
0.When extraneous excited frequency changes, change compression or the elongation (decrement of four the second springs or elongation must be consistent) of the second spring by screwing or unscrew bolt, because the second spring is the nonlinear type spring, its stiffness K
1continuous variation with amount of deformation changes, stiffness K
1continuously change, and then system global stiffness K changes continuously, realize the continuous adjusting of absorbing frequency, so that bump leveller absorbs the excitation force of different frequency.
In sum, the utlity model has characteristics simple in structure, that volume is little, with low cost.
The utility model the utility model is applicable to vehicular field, as shock-absorbing means.
The accompanying drawing explanation
Below in conjunction with drawings and the specific embodiments, the utility model is done further to describe in detail.
The cross-section structure sketch that Fig. 1 is the utility model embodiment;
The plan view that Fig. 2 is Fig. 1.
In figure: 1, base; 2, the first spring; 3, the second spring; 4, bolt; 5, mass block.
Embodiment
Embodiment
The dynamic vibration absorber that a kind of rigidity is adjustable, structure as shown in Figure 1-2, comprises base 1, mass block 5, and the first spring 2.
The first spring 2 is provided with four, is fixed at equably between base 1 and mass block 5.
Be provided with and press chamber corresponding to the position of each the first spring 2 top on mass block 5, press chamber and extend upwardly to mass block 5 tops and press chamber with open suitable for reading.
Pressing spacingly in chamber has nonlinear the second spring 3, and with the first spring 2 coaxial line settings, the top of the second spring 3 is positioned at presses chamber.The top of the second spring 3 is fixedly connected with for changing the press device of the second spring 3 rigidity, and press device also is limited in and presses in chamber.On mass block 5 corresponding in the second spring 3 belows places, being provided with tapped hole.
Press device is bolt 4, the radial dimension of its head is greater than the diameter of the second spring 3, the screw rod position is passed the second spring 3 and tapped hole and is set in the first spring 2, the length at screw rod position is less than the complete vertical distance between its top to base 1 bottom when compressed of the second spring 3, the second spring 3 is complete when compressed, screw rod can not run through base 1, to guarantee base 1 fixation.
If the rigidity of the first spring 2 and the second spring 3 is respectively K
1, K
2, by the first spring 2 and the synthetic rear system stiffness K of the second spring 3
0=K
1k
2/ (K
1+ K
2), because the first spring 2, the second spring 3 evenly are provided with four groups, decoupling zero each other, system global stiffness K=4K
0.
When extraneous excited frequency changes, can change compression or the elongation (decrement of four the second springs 3 or elongation must be consistent) of the second spring 3 by screwing or unscrew bolt 4, because the second spring 3 is the nonlinear type spring, its stiffness K
1continuous variation with amount of deformation changes, stiffness K
1continuously change, and then system global stiffness K changes continuously, realize the continuous adjusting of absorbing frequency, so that bump leveller absorbs the excitation force of different frequency.
Claims (4)
1. the dynamic vibration absorber that rigidity is adjustable, mass block (5) and base (1) that comprising is separated by up and down arranges, also comprise the first spring (2) be positioned between base (1) and mass block (5),
it is characterized in that:the upper position corresponding to the first spring (2) top of described mass block (5) is provided with presses chamber, press chamber and extend upwardly to mass block (5) top, pressing spacingly in chamber has nonlinear the second spring (3), and the top of the second spring (3) is fixedly connected with by pressing chamber spacing and for changing the press device of the second spring (3) rigidity.
2. the adjustable dynamic vibration absorber of rigidity according to claim 1,
it is characterized in that:the upper position corresponding to the second spring (3) below of mass block (5) is provided with tapped hole; Described press device is bolt (4), the screw rod position of bolt (4) is through the second spring (3) and tapped hole be set in the first spring (2), and the length at screw rod position is less than the complete vertical distance between its top to base (1) bottom when compressed of the second spring (3); The radial dimension of bolt (4) head is greater than the diameter of the second spring (3).
3. the adjustable dynamic vibration absorber of rigidity according to claim 1,
it is characterized in that:described the first spring (2) and the second spring (3) coaxial line setting.
4. according to the adjustable dynamic vibration absorber of the described rigidity of any one in claim 1-3,
it is characterized in that:described the first spring (2), the second spring (3), press device are provided with equably four groups between mass block (5) and base (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203016303U CN203335704U (en) | 2013-05-29 | 2013-05-29 | Stiffness-adjustable power vibration absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203016303U CN203335704U (en) | 2013-05-29 | 2013-05-29 | Stiffness-adjustable power vibration absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203335704U true CN203335704U (en) | 2013-12-11 |
Family
ID=49704381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203016303U Expired - Fee Related CN203335704U (en) | 2013-05-29 | 2013-05-29 | Stiffness-adjustable power vibration absorber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203335704U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696428A (en) * | 2015-02-13 | 2015-06-10 | 柳州金鸿橡塑有限公司 | Rubber power vibration absorber |
| CN107588146A (en) * | 2017-10-18 | 2018-01-16 | 天津理工大学 | A kind of string formula bump leveller of achievable variation rigidity |
-
2013
- 2013-05-29 CN CN2013203016303U patent/CN203335704U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104696428A (en) * | 2015-02-13 | 2015-06-10 | 柳州金鸿橡塑有限公司 | Rubber power vibration absorber |
| CN107588146A (en) * | 2017-10-18 | 2018-01-16 | 天津理工大学 | A kind of string formula bump leveller of achievable variation rigidity |
| CN107588146B (en) * | 2017-10-18 | 2019-04-05 | 天津理工大学 | A kind of string formula bump leveller of achievable variation rigidity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 Termination date: 20210529 |