CN210949644U - A dynamic vibration absorber - Google Patents

Abstract

The utility model discloses a dynamic vibration absorber, comprising a mass block, wherein the mass block comprises a first mass block and a second mass block arranged in a split type; the second mass block is detachably fixed on the first mass block; The rubber is vulcanized and fixed to the first mass block; the installation rod is inserted into the rubber, and the installation rod is vulcanized and fixed to the rubber. The utility model provides a dynamic vibration absorber to change the frequency bandwidth of the vibration absorber by changing the mass of the mass block, which saves time for installation and debugging.

Description

A dynamic vibration absorber

technical field

The utility model relates to the field of automobile parts, in particular to a dynamic vibration absorber.

Background technique

The dynamic vibration absorber is an important part of the automobile. The dynamic vibration absorber refers to the equipment that uses the resonance system to absorb the vibration energy of the object to reduce the vibration of the object. The principle is to attach a mass-spring resonance system to the vibrating object, and the reaction force generated by this additional system during resonance can reduce the vibration of the vibrating object. The vibration frequency of the vibrating object and the vibration absorber is determined by two parameters, the stiffness of the rubber on the vibration absorber and the mass of the mass. The existing dynamic vibration absorber changes the stiffness of the vibration absorber by vulcanizing the hardness of different rubber materials, thereby changing the frequency bandwidth range, the manufacturing time is long, and the efficiency is low.

For example, a "Dynamic Vibration Absorber and Automobile" disclosed in the Chinese patent document, its publication number CN206972812 U, includes a mounting base, a rubber block, a mass block and a guide rod; the two ends of the rubber block are respectively connected to the The mounting base and the mass block are fixedly connected; one end of the guide rod is fixedly connected to the mounting base, and the other end of the guide rod passes through the opening on the mass block, and the guide rod is located at the The outer side of the rubber block is perpendicular to the mounting base and the mass block, so as to limit the yaw vibration of the mass block. In this way, the yaw vibration of the mass block will be greatly limited, and the natural frequency of the dynamic vibration absorber will not be affected, so that a better vibration reduction and noise reduction effect can be achieved. However, when the vibration frequency of the vibrating object changes, it is still necessary to change the stiffness of the vibration absorber to change the frequency bandwidth range, and the installation and debugging are more complicated.

Utility model content

The utility model provides a dynamic vibration absorber, which can change the frequency bandwidth of the vibration absorber by changing the mass of the mass block, in order to overcome the problems in the prior art that the frequency bandwidth range is changed by changing the stiffness of the vibration absorber, the manufacturing time is long and the efficiency is low. , saving time for installation and debugging.

In order to achieve the above object, the utility model adopts the following technical solutions:

A dynamic vibration absorber includes a mass block, wherein the mass block includes a first mass block and a second mass block arranged in separate parts; the second mass block is detachably fixed on the first mass block; rubber, the rubber It is vulcanized and fixedly connected with the first mass block; an installation rod is inserted into the rubber, and the installation rod is vulcanized and fixed to the rubber.

The vibration absorber is used to reduce vibration. The frequency of the vibration absorber is mainly determined by the stiffness of the rubber and the mass of the mass. To change the frequency of the vibration absorber, the stiffness of the rubber or the mass of the mass needs to be changed. The mass block is set as the first mass block and the second mass block set in a split type, wherein the first mass block is vulcanized and fixed with the rubber, and the second mass block is detachably connected with the first mass block. Therefore, as long as the second mass block is changed The quality of the vibration absorber can change the frequency bandwidth of the vibration absorber. The second mass block is only connected with the first mass block, and the second mass block is detachably connected with the first mass block. It is convenient and quick to install and replace, thus saving time for installation and commissioning. Finally, install the shock absorber on the support arm of the car to attenuate the vibration of the powertrain, improve the NVH performance of the car, and make the car more comfortable to use; the mounting rod is used to connect the shock absorber with the device that needs to be damped. It is connected in the rubber and vulcanized and fixed with the rubber, which enhances the fixed area between the rubber and the installation rod, and improves the installation firmness between the rubber and the installation rod.

Preferably, a mass adjustment hole is provided on the second mass block.

The vibration absorber changes the frequency bandwidth of the vibration absorber by replacing the second mass block. The setting of the mass adjustment hole is convenient for the second mass block to change its mass without changing its maximum size. The mass of the mass. In addition, when the installation position of the installation rod exceeds the installation surface on the first installation hole, the setting of the mass adjustment hole on the second mass block can ensure that the first mass block and the second mass block can still fit together. At this time, the installation rod The protruding part is arranged in the mass adjustment hole to ensure the installation firmness between the first mass block and the second mass block.

Preferably, a rubber hole is provided on the first mass block, and the rubber is vulcanized and fixed in the rubber hole.

The rubber is vulcanized and fixed on the vulcanized through hole of the first mass block, which can enhance the installation firmness between the rubber and the first mass block, and at the same time effectively avoid the direct connection between the mounting rod and the first mass block, and prevent it from colliding during vibration. It can also improve the shock absorption function of the vibration absorber.

Preferably, the rubber is arranged in a column shape, and a groove structure is arranged on the end surface of the rubber.

Setting the rubber in a column shape is convenient for vulcanizing the rubber and fixing it in the first mass block, and setting the rubber end face with a groove structure reduces the material and effectively prevents the unevenness of the rubber end face from causing a gap between the first mass block and the second mass block. The connection is not secure.

Preferably, the first mass block is provided with a first connection hole, and the first connection hole penetrates the upper and lower end surfaces of the first mass block.

The first connection hole is used to connect with the second mass block. The first connection hole is arranged on the first mass block in the axial direction. The first connection hole penetrates through the upper and lower end surfaces of the first mass block to facilitate the installation of the first mass block. The number of connection holes is set at least two, and they are set symmetrically along the center point to ensure that the first mass block and the second mass block are firmly connected.

Preferably, a second connection hole is provided at a corresponding position of the second mass block, and the second connection hole is arranged in a stepped structure.

The second connection holes are arranged corresponding to the first connection holes on the first mass block, and the second connection holes are arranged in a stepped structure. The arrangement of the stepped structure is convenient for placing the head of the connecting assembly and preventing the head of the connecting assembly from protruding on the second mass. The end face of the block causes the head of the connecting assembly to collide with other components in the vehicle during vibration, resulting in failure, and the installation firmness between the connecting assembly and the second mass can also be enhanced.

Preferably, a connecting assembly for realizing detachable connection between the first mass block and the second mass block is also included, and the connecting assembly includes an integrally arranged connecting column and a gasket.

The connecting assembly is used to connect the first mass block and the second mass block, and the first mass block and the second mass are quickly connected through a connecting column, where the connecting column is set as a connecting bolt, and the setting of the connecting column also effectively prevents the vibration absorber from working The yaw vibration of the second mass block, in addition, setting a gasket on the connecting column can increase the contact area between the connecting column and the stepped surface of the second mass block, reduce the pressure, and also prevent the connecting components from loosening and protect the first mass. The second mass block and the connecting bolts are not damaged, and the integrated arrangement of the connecting column and the gasket effectively prevents the inconvenience caused by the loss of the gasket when the second mass block is replaced.

Therefore, the utility model has the following beneficial effects:

(1) Improve and change the quality of the second mass block to change the frequency bandwidth of the vibration absorber, which is convenient for the installation and debugging of the vibration absorber;

(2) A quality adjustment hole is set on the second mass block to facilitate the quality adjustment of different second mass blocks;

(3) The rubber is vulcanized and fixed in the rubber hole of the first mass block to reduce the noise caused by the collision between the first mass block and the installation rod, and at the same time, it also enhances the shock absorption function of the vibration absorber;

(4) The arrangement of the connecting column can not only connect the first mass block and the second mass block, but also prevent the yaw vibration of the second mass block.

Description of drawings

Fig. 1 is a structural schematic diagram of a dynamic vibration absorber;

Fig. 2 is the exploded structure schematic diagram of Fig. 1;

Fig. 3 is the structural representation of the second mass block;

Fig. 4 is the application structure schematic diagram of dynamic vibration absorber;

In the figure: 1. Vibration absorber 2, mounting rod 3, first mass block 301, rubber hole 302, first connecting hole 4, second mass block 401, second connecting hole 402, mass adjusting hole 5, connecting assembly 501, Gasket 502, connecting column 6, rubber 7, support arm 8, hydraulic suspension.

Detailed ways

The present utility model will be further described below with reference to the accompanying drawings and specific embodiments.

Example 1:

In Embodiment 1 shown in FIG. 1 and FIG. 2 , a dynamic vibration absorber includes a mass block, and the mass block includes a first mass block 3 and a second mass block 4 arranged in a split type; the second mass The block 4 is detachably fixed on the first mass block 3; the rubber 6, the rubber 6 is vulcanized and fixedly connected with the first mass block 3; the mounting rod 2, the mounting rod 2 is inserted into the rubber 6, the mounting rod 2 and rubber 6 vulcanized fixed.

The dynamic vibration absorber is mainly composed of a mass block, rubber 6 and a mounting rod 2. The vibration absorber 1 is installed on the vibrating object, and the reaction force generated during resonance can reduce the vibration of the vibrating object. Among them, the vibration frequency of the vibration absorber 1 is mainly It is determined by the stiffness of the rubber 6 in the vibration absorber 1 and the mass of the mass block. The mass block includes a first mass block 3 and a second mass block 4 which are arranged in separate parts. The first mass block 3 is fixedly connected with the rubber 6, and then the installation rod 2 is inserted into the rubber 6, and the vibration absorber is connected to the vibration absorber through the installation rod 2. 1 is installed on the vibrating object, the basic function of vibration absorber 1 is realized, and because the vibration frequency of the vibrating object is different, the frequency bandwidth of the vibration absorber 1 used for shock absorption is different, and the frequency bandwidth of the vibration absorber 1 is changed. To change the stiffness of the rubber 6 or the mass of the mass block, the setting of the second mass block 4 is convenient to change the frequency bandwidth of the vibration absorber 1 by changing the mass of the mass block, which saves time for installation and debugging. The second mass 4 is detachably connected to the first mass 3 to facilitate the replacement of the second mass 4 .

Example 2:

In Embodiment 2 shown in FIG. 3 , the technical solution of Embodiment 2 is basically the same as that of Embodiment 1, and the difference lies in that: a mass adjustment hole 402 is provided on the second mass block 4, and the mass adjustment hole The setting of 402 is convenient to distinguish the second mass 4 of different quality. According to the size of the aperture, the quality of the second mass 4 is different. The larger the aperture of the mass adjustment hole 402, the smaller the mass of the second mass 4; The second mass 4 changes its mass without changing its maximum size, which facilitates the installation of the second mass 4 .

Example 3:

The technical solution of Embodiment 3 is basically the same as that of Embodiment 1, except that the first mass block 3 is sleeved on the rubber 6, the first mass block 3 is provided with a rubber hole 301, and the rubber 6 is provided with In the shape of a column, the rubber 6 is vulcanized and fixed in the rubber hole 301 , and the height of the rubber 6 is consistent with the thickness of the first mass 3 . Such an installation method effectively enhances the installation firmness between the rubber 6 and the first mass block 3 , and at the same time avoids the direct connection between the mounting rod 2 and the first mass block 3 , which may cause noise due to collision during vibration, and improves the vibration absorber 1 shock function.

In addition, a groove structure is provided on the end face of the rubber 6, which saves materials. The first mass block 3 and the second mass block 4 are attached together, and the height of the rubber 6 is consistent with the thickness of the first mass block 3. Therefore, The arrangement of the groove structure on the end surface of the rubber 6 is beneficial to prevent the unevenness of the end surface of the rubber 6 from causing the first mass block 3 and the second mass block 4 to fit firmly, thereby causing noise during vibration.

Example 4:

The technical solution of Embodiment 4 is basically the same as the technical solution of Embodiment 1, except that the first mass block 3 and the second mass block 4 are fixedly connected through the connecting assembly 5, and the first mass block 3 is set on the first mass block 3. The first connecting hole 302, the second connecting hole 401 is set on the second mass block 4, the connecting assembly 5 includes a connecting column 502 and a gasket 501, the connecting column 502 is set as a connecting bolt, and the screw rod of the connecting bolt passes through the first connection The hole 302 and the second connecting hole 401 respectively fix the first mass block 3 and the second mass block 4, the second connecting hole 401 on the second mass block 4 is set as a stepped structure, and the head of the connecting bolt and the washer 501 are the same. It is arranged on the step surface to prevent the connecting bolt from protruding and colliding with other components in the vehicle during vibration and causing failure. The gasket 501 is arranged between the head of the connecting bolt and the stepped surface, increasing the head of the connecting bolt and the second mass The contact area on the step surface of the block 4 can reduce the pressure, and can also prevent the connection assembly 5 from loosening, and protect the second mass block 4 and the connection bolts. In addition, the gasket 501 and the connecting column 502 are integrally arranged, which effectively prevents the inconvenience caused by the gasket 501 being lost when the second mass 4 is replaced.

Example 5:

In Embodiment 5 shown in FIG. 4 , Embodiment 5 is an application example of the present utility model: the vibration absorber 1 is installed on the support arm 7, the mounting rod 2 on the vibration absorber 1 is connected with the support arm 7, and the support arm There is a mounting hole for the vibration absorber, and a fixing piece for fixing the mounting rod is arranged in the mounting hole of the vibration absorber. The hydraulic mount 8 is connected to the motor. A cavity structure is arranged in the support arm 7. The motor is arranged inside the cavity. After the support arm 7 is connected to the motor, when the car starts, the motor will vibrate, and the vibration is transmitted to the support. On the arm 7, the support arm also vibrates, and the support arm 7 has a vibration peak at a certain frequency. The vibration absorber 1 is used to attenuate the vibration on the support arm 7. When the vibration frequency is different, there is no need to replace the vibration absorber. The frequency bandwidth range of the vibration absorber can be changed by replacing the second mass blocks 4 with different masses, thereby realizing the function of damping vibration.

The above embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims (7)

1. A dynamic vibration absorber is characterized by comprising,

the mass block comprises a first mass block (3) and a second mass block (4) which are arranged in a split manner;

the second mass block (4) is detachably fixed on the first mass block (3);

the rubber (6), the rubber (6) is vulcanized and fixedly connected with the first mass block (3);

the mounting rod (2) is inserted into the rubber (6), and the mounting rod (2) is vulcanized and fixed with the rubber (6).

2. The dynamic vibration absorber according to claim 1, wherein mass adjusting holes (402) are provided in said second mass (4).

3. A dynamic vibration absorber according to claim 1, wherein said first mass (3) is provided with rubber holes (301), and said rubber (6) is vulcanized and fixed in said rubber holes (301).

4. The dynamic vibration absorber according to claim 1, wherein said rubber (6) is provided in a cylindrical shape, and an annular groove structure is provided on an end surface of said rubber (6).

5. The dynamic vibration absorber according to claim 1, wherein a first connection hole (302) is provided in said first mass (3), said first connection hole (302) penetrating upper and lower end surfaces of the first mass.

6. The dynamic vibration absorber according to claim 1, wherein a second connecting hole (401) is provided at a position corresponding to said second mass (4), said second connecting hole (401) being provided in a stepped configuration.

7. The dynamic vibration absorber according to any of claims 1-6, further comprising a connecting member (5) for removably connecting the first mass (3) to the second mass (4), said connecting member (5) comprising an integrally formed connecting post (502) and spacer (501).

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