CN203939908U - The bump leveller that rigidity is adjustable - Google Patents

Abstract

The utility model discloses a vibration absorber with adjustable stiffness, which comprises a base composed of an upper base and a lower base. Mass blocks are elastically connected between two opposite inner side walls of the base. As for the magnet, the top of the upper base and the bottom of the lower base are fixedly connected with static magnets, the polarities between the adjacent surfaces of the moving magnets are opposite, and the polarities between the adjacent surfaces of the static and moving magnets are the same. The polarities between the adjacent surfaces of the dynamic and static magnets of the utility model are opposite. When the mass block vibrates up and down, a repulsive force is generated between the dynamic and static magnets, which can hinder the vibration of the mass block, so the stiffness of the vibration absorber can be increased. The utility model can adjust the static The size of the magnet adjusts the stiffness of the vibration absorber, thereby realizing the frequency adjustable function of the vibration absorber. The utility model can be installed on the body, chassis, transmission system and other parts of various types of cars, off-road vehicles, commercial vehicles, etc., can change the structural modal frequency, avoid resonance problems, improve NVH performance and quality, and have a wide range of applications.

Description

Vibration absorbers with adjustable stiffness

technical field

The utility model belongs to the technical field of vibration absorption, and relates to a dynamic vibration absorption device, in particular to a vibration absorber with adjustable stiffness.

Background technique

Mechanical vibration will cause adverse effects such as noise pollution and affect the work of other mechanical equipment in engineering. For example, when the vehicle is running, when the engine excitation or road surface excitation is the same or similar to the modal frequency of the body, frame, etc., it is easy to cause resonance. , causing roaring in the car, vehicle resonance, steering wheel shaking and other phenomena.

Vibration absorption, vibration isolation, vibration resistance, vibration elimination and other means are used in engineering to reduce vibration hazards, and adding a dynamic vibration absorber to the controlled system is an effective means of suppressing vibration. A dynamic vibration absorber is a structure with a certain stiffness and quality. When the excitation with a specific frequency excites the total system, if the natural frequency of the vibration absorber is the same as the excitation frequency, it will cause resonance of the vibration absorber and make it absorb Maximum energy. Most of the existing vibration absorbers are single-frequency vibration absorbers, which can only absorb vibration for one frequency, and need to be customized according to the frequency requirements of different NVH problems.

The Chinese invention patent application with the application number 2013106522301 discloses "a cantilever beam dynamic vibration absorber with adjustable stiffness", which includes an electromagnet and an electromagnetic coil. The electromagnetic stiffness changes with the change of the coil current, only by changing the external The input current can adjust the natural frequency of the vibration absorber. However, this patent is a passive vibration absorber, which has a complex structure and needs to be energized to work, and cannot realize the function of actively absorbing vibrations when an object encounters resonance.

The Chinese Utility Model Patent No. 200510060678X discloses "a magnet shock absorber", which requires five pairs of magnets. When vibration occurs, the distance between the magnets changes, and the magnitude of the repulsive force also changes. The direction of change is Reduce vibration and achieve the purpose of vibration reduction. But the structure of this product patent is complicated, and component is numerous, especially will use five pairs of magnets, and cost is high, and integral strength is poor.

Utility model content

The purpose of the invention of the present utility model is to provide a vibration absorber with adjustable stiffness. The upper and lower corresponding positions of the horizontally arranged moving magnets fixedly connected to the mass block are respectively provided with static magnets. The polarity between the adjacent surfaces of the moving and static magnets Mutual repulsion, when the mass block vibrates up and down, a repulsive force is generated between the dynamic and static magnets, thereby hindering the vibration of the mass block, so the stiffness of the vibration absorber can be increased. The utility model can adjust the stiffness of the vibration absorber by adjusting the size of the static magnet. Thereby realizing the frequency adjustable function of the vibration absorber.

In order to achieve the above object, the technical solution adopted in the utility model is:

A vibration absorber with adjustable stiffness, including a hollow box-shaped structural base formed by fastening and fastening the upper base and the lower base up and down, a mass block is elastically connected between the two opposite inner walls of the upper base or the lower base, and the mass The upper and lower ends of the block are respectively fixedly connected with an upper moving magnet and a lower moving magnet. The top of the upper base is fixedly connected with a corresponding upper static magnet which is spaced up and down from the upper moving magnet. And the corresponding lower static magnet, the polarity between the adjacent surfaces of the upper moving magnet and the lower moving magnet is opposite, the polarity between the adjacent surfaces of the upper static magnet and the upper moving magnet is the same, and the adjacent surfaces of the lower static magnet and the lower moving magnet same polarity.

As a limitation of the present utility model, the upper base is an n-shaped structure, the lower base is a U-shaped structure, and the upper base and the lower base are socketed and fitted between the side walls of the two and fixedly connected by horizontally arranged bolts. , the overall structure of the upper base and the lower base is a "hollow T" shape or a "hollow inverted T" shape.

As a further limitation of the present utility model, the mass block is horizontally arranged between the left and right inner walls of the upper base or the lower base, and the left and right ends of the mass block are respectively connected with rubber vulcanized integrally with the mass block, and the rubber is connected with the upper base or the lower base. The left and right medial walls are vulcanized into one.

As a further limitation of the present invention, the upper moving magnet and the lower moving magnet are respectively glued to the upper and lower surfaces of the mass block.

As a further limitation of the present invention, the upper static magnet and the lower static magnet are respectively glued to the top inner surface of the upper base and the bottom inner surface of the lower base.

Due to the adoption of the above-mentioned technical scheme, the technical progress of the utility model compared with the prior art lies in that: the upper and lower moving magnets of the utility model are fixedly connected with the mass block to form the vibration mass of the vibration absorber; Stiffness and partial damping. When the mass block vibrates up and down, the repulsive force between adjacent dynamic and static magnets hinders the vibration of the mass block, thereby increasing the stiffness of the vibration absorber. The utility model can adjust the stiffness of the vibration absorber by adjusting the size of the static magnet, thereby realizing the adjustable frequency function of the vibration absorber.

The utility model can be installed on the body, chassis, transmission system and other parts of various types of cars, off-road vehicles, commercial vehicles, etc., can change the structural modal frequency, avoid resonance problems, improve NVH performance and quality, and have a wide range of applications.

The utility model will be further described in detail in conjunction with the accompanying drawings and specific embodiments below.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the utility model embodiment 1;

Fig. 2 is the front view of embodiment 1;

Fig. 3 is a partial longitudinal sectional view of Fig. 2, in which N and S represent the polarities of the magnet surfaces where they are located. 

In the figure: 1—lower base, 2—upper base, 3—rubber, 4—mass block, 5—moving magnet, 6—static magnet.

Detailed ways

Embodiment 1 A vibration absorber with adjustable stiffness

As shown in Fig. 1 and Fig. 2, this embodiment includes a hollow box-shaped structural base formed by fastening and fastening the upper base 2 and the lower base 1 up and down. The upper base 2 is an n-shaped structure, and the lower base 1 is a U-shaped structure. The upper base 2 and the lower base 1 are socketed and fitted between the side walls of the two and fixedly connected by horizontally arranged bolts. The upper base 2 and the The overall structure of the lower base 1 is hollow T-shaped.

A mass block 4 is arranged between the left and right inner sidewalls of the lower base 1 . The mass block 4 is arranged horizontally, and its left and right ends are respectively connected with rubber 3 which is vulcanized integrally with the mass block 4 , and the rubber 3 is vulcanized integrally with the left and right inner sidewalls of the lower base 1 .

The upper surface and the lower surface of the mass block 4 are respectively connected with a moving magnet 5 through structural glue.

The inner surface of the top of the upper base 2 and the inner surface of the bottom of the lower base 1 are fixedly connected with moving magnets 5 and corresponding static magnets respectively through structural glue.

As shown in FIG. 3 , the polarities between adjacent surfaces of the two moving magnets 5 are opposite. The polarities between the adjacent surfaces of the static magnet 6 and the moving magnet 5 are the same.

Embodiment 2 A vibration absorber with adjustable stiffness

The difference between this embodiment and embodiment 1 only lies in:

① The overall structure formed by matching the upper base and the lower base is a hollow inverted T-shaped shell.

② The polarity of the upper and lower sides of the moving magnet and the static magnet is just opposite to that shown in Figure 3.

The structure of other parts of this embodiment is the same as that of Embodiment 1.

Embodiment 3 A shock absorber with adjustable stiffness

The difference between this embodiment and embodiment 1 only lies in:

① The overall structure formed by matching the upper base and the lower base is a hollow inverted T-shaped shell.

2. The polarity of the upper and lower sides of the moving magnet and the static magnet is just opposite to that shown in Figure 3.

③ The quality block and the rubber are arranged between the left and right inner walls of the upper base.

The structure of other parts of this embodiment is the same as that of Embodiment 1.

Embodiment 4 A vibration absorber with adjustable stiffness

The difference between this embodiment and embodiment 1 only lies in:

① The quality block and the rubber are arranged between the left and right inner walls of the upper base.

The structure of other parts of this embodiment is the same as that of Embodiment 1.

Implement 5 a shock absorber with adjustable stiffness

The difference between this embodiment and embodiment 1 only lies in:

① The overall structure formed by matching the upper base and the lower base is a hollow inverted T-shaped shell.

The structure of other parts of this embodiment is the same as that of Embodiment 1.

Implementation 6 A shock absorber with adjustable stiffness

The difference between this embodiment and embodiment 1 only lies in:

①The polarities of the upper and lower sides of the moving magnet and the static magnet are just opposite to those shown in Figure 3.

The structure of other parts of this embodiment is the same as that of Embodiment 1.

Implementation 7 A shock absorber with adjustable stiffness

①The polarities of the upper and lower sides of the moving magnet and the static magnet are just opposite to those shown in Figure 3.

②The quality block and the rubber are arranged between the left and right inner walls of the upper base.

The structure of other parts of this embodiment is the same as that of Embodiment 1.

Embodiment 8 A vibration absorber with adjustable stiffness

The difference between this embodiment and embodiment 1 only lies in:

① The overall structure formed by matching the upper base and the lower base is a hollow inverted T-shaped shell.

②The quality block and the rubber are arranged between the left and right inner walls of the upper base.

The structure of other parts of this embodiment is the same as that of Embodiment 1.

Claims (5)

1. A vibration absorber with adjustable stiffness, comprising a hollow box-shaped structural base formed by fastening and fastening the upper base and the lower base up and down, characterized in that: the elastic A mass block is connected, and the upper and lower ends of the mass block are respectively fixedly connected with an upper moving magnet and a lower moving magnet. The upper and lower moving magnets are separated from each other up and down and the corresponding lower static magnets have opposite polarities between the adjacent surfaces of the upper moving magnet and the lower moving magnet. The polarities between the adjacent surfaces of the upper static magnet and the upper moving magnet are the same. Adjacent faces of the moving magnet have the same polarity. 2. The vibration absorber with adjustable stiffness according to claim 1, characterized in that: the upper base is an n-shaped structure, the lower base is a U-shaped structure, and the upper base and the lower base are located between the side walls of the two. The joints are socketed and fixed by bolts set horizontally. The overall structure of the upper base and the lower base is a "hollow T" shape or a "hollow inverted T" shape. 3. The vibration absorber with adjustable stiffness according to claim 2, characterized in that: the mass block is horizontally arranged between the left and right inner walls of the upper base or the lower base, and the left and right ends of the mass block are respectively connected with the vulcanized mass block. Integral rubber, the rubber is vulcanized in one body with the left and right inner walls of the upper base or the lower base. 4. The vibration absorber with adjustable stiffness according to claim 3, characterized in that: the upper moving magnet and the lower moving magnet are respectively glued to the upper and lower surfaces of the mass block. 5 . The vibration absorber with adjustable stiffness according to claim 4 , wherein the upper static magnet and the lower static magnet are respectively glued to the top inner surface of the upper base and the bottom inner surface of the lower base.