CN216975671U - Frequency-adjustable dynamic vibration absorber - Google Patents
Frequency-adjustable dynamic vibration absorber Download PDFInfo
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- CN216975671U CN216975671U CN202123451773.6U CN202123451773U CN216975671U CN 216975671 U CN216975671 U CN 216975671U CN 202123451773 U CN202123451773 U CN 202123451773U CN 216975671 U CN216975671 U CN 216975671U
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- dynamic vibration
- vibration absorber
- hollow cavity
- frequency
- metal ring
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Abstract
The utility model discloses a frequency-adjustable dynamic vibration absorber, which relates to the field of automobile parts and comprises a rubber shell, a metal ring, a hollow cavity and an air nozzle, wherein two ends of the rubber shell are communicated and sleeved on a constant-speed driving shaft, the rubber shell is vulcanized and formed on the metal ring, the rubber shell at the periphery of the metal ring is internally provided with the annular hollow cavity, the end surface of the rubber shell is at least provided with the air nozzle which is communicated with the hollow cavity, and the air nozzle is used for inflating or deflating the hollow cavity so as to adjust the inherent frequency of the dynamic vibration absorber. The utility model has the beneficial effects that: the rigidity and the frequency of the dynamic vibration absorber can be adjusted by adjusting air pressure, so that a product is matched with a whole vehicle, and the optimal vibration absorption effect is achieved; different vehicle types often need to be matched with the dynamic vibration absorbers with different structures, so that the specifications of the dynamic vibration absorbers are various, the production and use costs are high, the utility model can be suitable for various vehicle types as long as the installation size allows, and the economical efficiency is better.
Description
Technical Field
The utility model relates to the field of automobile parts, in particular to a frequency-adjustable dynamic vibration absorber.
Background
Constant velocity drive shafts are key components of automotive transmission systems and are responsible for the transfer of vehicle power from the transmission to the wheel ends. Due to the excitation of the engine or the motor, the constant-speed driving shaft can generate vibration noise under specific working conditions, and driving and riding comfort are affected. The vibration noise problem can be solved/improved by adding a dynamic vibration absorber on the constant-speed driving shaft.
As shown in fig. 1 and 2, in the prior art, a dynamic vibration absorber (1 ') is fixed to a shaft of a constant velocity drive shaft (3 ') by a yoke (2 '). As shown in fig. 2, the conventional dynamic vibration absorber is composed of a metal ring (4 ') and a rubber portion (5'), and is a solid structure in which metal and rubber are vulcanized together. However, once this structure is produced, its natural frequency cannot be changed. The best damping effect cannot be achieved or no damping effect is achieved with slight deviation in design and production. Different motorcycle types often need to match the dynamic vibration absorber of different structures, lead to the dynamic vibration absorber specification to be various, and production and use cost are high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide the frequency-adjustable dynamic vibration absorber, after a product is produced, the natural frequency is adjusted to match the performance of the dynamic vibration absorber with the performance of the whole vehicle, so that the optimal vibration absorption performance is achieved, and the problem of vibration noise is solved or eliminated.
The purpose of the utility model is achieved by the following technical scheme: the power vibration absorber with the adjustable frequency comprises a rubber shell, a metal ring, a hollow cavity and an air nozzle, wherein two ends of the rubber shell are communicated and sleeved on a constant-speed driving shaft, the rubber shell is formed on the metal ring in a vulcanization mode, the rubber shell on the periphery of the metal ring is further internally provided with the annular hollow cavity, at least one air nozzle is installed on the end face of the rubber shell and communicated with the hollow cavity, and the air nozzle is used for inflating or deflating the hollow cavity so as to adjust the natural frequency of the power vibration absorber.
As a further technical scheme, a groove is formed in the rubber shell and used for installing the hoop.
As a further technical scheme, the air tap is arranged on one side, far away from the groove, of the rubber shell.
As a further technical scheme, the rubber shell, the metal ring and the hollow cavity are coaxially or non-coaxially arranged.
As a further technical solution, the hollow cavity may be provided with one or more hollow cavities, and each hollow cavity is provided with an air tap.
The utility model has the beneficial effects that:
(1) the rigidity and the frequency of the dynamic vibration absorber can be adjusted by adjusting air pressure, so that a product is matched with a whole vehicle, and the optimal vibration absorption effect is achieved;
(2) once the product with the original structure is produced, the natural frequency of the product cannot be changed, the optimal vibration reduction effect cannot be achieved due to slight deviation in design and production, or the vibration reduction effect is not achieved, and the utility model can solve the problem;
(3) different vehicle types often need to be matched with dynamic vibration absorbers with different structures, so that the specifications of the dynamic vibration absorbers are various, the production and use costs are high, the utility model can adapt to various vehicle types as long as the installation size allows, and the economy is better;
(4) the mass production of the dynamic vibration absorbers has the characteristic that the inherent frequency is discrete, so that part of the dynamic vibration absorbers can not achieve the damping effect, and the utility model can solve the problem;
(5) the shaft type driving shaft can be applied to other shaft type products except for constant speed driving shafts.
Drawings
Fig. 1 is a schematic view showing a structure of a prior art dynamic vibration reducer assembled with a constant velocity drive shaft.
Fig. 2 is a partially enlarged schematic view of a region a in fig. 1.
Fig. 3 is a schematic structural diagram of the present invention.
Fig. 4 is a front view of the structure of the present invention.
Fig. 5 is a top view of the structure of the present invention.
Fig. 6 is a sectional view taken along line B-B of fig. 5.
Description of reference numerals: the dynamic vibration absorber comprises a dynamic vibration absorber 1 ', a clamping hoop 2 ', a constant-speed driving shaft 3 ', a metal ring 4 ' and a rubber part 5 '; rubber housing 1, metal ring 2, hollow cavity 3, air cock 4, recess 5.
Detailed Description
The utility model will be described in detail below with reference to the following drawings:
the embodiment is as follows: as shown in fig. 3 to 6, the frequency-adjustable dynamic vibration absorber includes a rubber housing 1, a metal ring 2, a hollow cavity 3 and an air tap 4, wherein two ends of the rubber housing 1 are penetrated and are used for being sleeved on a constant-speed driving shaft (or other shaft products except the constant-speed driving shaft). Referring to fig. 4 and 6, one end of the rubber housing 1 is provided with a groove 5 for mounting a hoop. The rubber shell 1 is formed on the metal ring 2 in a vulcanization molding mode, and the metal ring 2 and the rubber shell 1 are arranged coaxially. An annular hollow cavity 3 is further arranged in the rubber shell 1 at the periphery of the metal ring 2, and the hollow cavity 3, the metal ring 2 and the rubber shell 1 are coaxially arranged. One air tap 4 (one air tap 4 in this embodiment, or a larger number of air taps 4, which are uniformly distributed along the circumference of the end surface of the rubber housing 1) is installed on the end surface of the rubber housing 1, which is far away from the groove 5. The air nozzles 4 are communicated with the hollow cavities 3, one or more air nozzles can be arranged in the hollow cavities 3, and one air nozzle 4 is arranged in each hollow cavity 3 and used for inflating or deflating the hollow cavity 3, so that the natural frequency of the dynamic vibration absorber can be adjusted. The air cap 4 is of conventional construction readily available on the market.
Natural frequency of dynamic vibration absorberThe ratio is determined by mass and stiffness, and the formula is:
wherein f is the natural frequency; k is stiffness in newtons per meter; m is mass in kg.
As can be seen from the above formula, the natural frequency of the dynamic vibration absorber can be adjusted by changing the mass and/or stiffness thereof. Since the mass of the product (i.e., the dynamic vibration absorber) is not changed after production, only the stiffness can be changed to adjust the natural frequency. In the utility model, the air tap 4 is used for inflating or deflating the hollow cavity 3 to change the rigidity of the product, thereby adjusting the natural frequency of the product.
After the dynamic vibration absorber is loaded, the frequency of the dynamic vibration absorber can be adjusted according to the actual vibration condition of the vehicle, and the optimal vibration absorption effect is realized. For different vehicle types, the utility model can be used universally only by adjusting the rigidity through inflation and deflation under the condition that the installation size of the vehicle body allows. Different dynamic vibration absorber structures are not required to be designed for different types of vehicles, and research and development cost is reduced, so that the utility model has better economy.
The working principle of the utility model is as follows: on the basis of the structure of the existing dynamic vibration absorber, a hollow cavity structure is added, and the air tap is used for charging and discharging air to the hollow cavity, so that the rigidity of the dynamic vibration absorber is adjusted. And further, the dynamic adjustment of the natural frequency of the dynamic vibration absorber is realized, the matching performance of the dynamic vibration absorber and the whole vehicle is improved, and the driving and riding comfort of the vehicle is improved. In addition, the dynamic vibration absorber has universal applicability to various vehicle types, and the corresponding dynamic vibration absorber structure does not need to be developed aiming at a specific vehicle type, so that the research and development cost of a company is reduced.
It should be understood that equivalent alterations and modifications of the technical solution and the inventive concept of the present invention by those skilled in the art should fall within the scope of the appended claims.
Claims (5)
1. The utility model provides a frequency adjustable dynamic vibration absorber which characterized in that: including rubber housing (1), metal ring (2), hollow cavity (3) and air cock (4), the both ends of rubber housing (1) link up and are used for the suit in the constant speed drive axle, rubber housing (1) vulcanization moulding is on metal ring (2), still is equipped with annular hollow cavity (3) in rubber housing (1) of metal ring (2) periphery, install at least on the terminal surface of rubber housing (1) one air cock (4) with hollow cavity (3) intercommunication, air cock (4) are used for aerifing or deflating in hollow cavity (3), thereby adjust the natural frequency of power bump leveller.
2. The frequency tunable dynamic vibration absorber of claim 1 wherein: a groove (5) is formed in the rubber shell (1) and used for installing a hoop.
3. The frequency tunable dynamic vibration absorber of claim 2, wherein: the air tap (4) is arranged on one side of the rubber shell (1) far away from the groove (5).
4. The frequency tunable dynamic vibration absorber of claim 1 wherein: the air faucet is characterized in that one or more hollow cavities (3) are arranged, and each hollow cavity (3) is provided with an air faucet (4).
5. The frequency tunable dynamic vibration absorber of any one of claims 1 to 4, wherein: the rubber shell (1), the metal ring (2) and the hollow cavity (3) are coaxially arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123451773.6U CN216975671U (en) | 2021-12-31 | 2021-12-31 | Frequency-adjustable dynamic vibration absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123451773.6U CN216975671U (en) | 2021-12-31 | 2021-12-31 | Frequency-adjustable dynamic vibration absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216975671U true CN216975671U (en) | 2022-07-15 |
Family
ID=82349062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123451773.6U Active CN216975671U (en) | 2021-12-31 | 2021-12-31 | Frequency-adjustable dynamic vibration absorber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216975671U (en) |
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2021
- 2021-12-31 CN CN202123451773.6U patent/CN216975671U/en active Active
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| GR01 | Patent grant | ||
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| CP03 | Change of name, title or address |
Address after: 311215 Wanxiang Road, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: Wanxiang Qianchao Co.,Ltd. Patentee after: WANXIANG GROUP Co.,Ltd. Address before: No.1 Wanxiang Road, Xiaoshan Economic and Technological Development Zone, Hangzhou City, Zhejiang Province Patentee before: WANXIANG QIANCHAO Co.,Ltd. Patentee before: WANXIANG GROUP Co.,Ltd. |