Dynamic vibration absorber structure with adjustable frequency

Abstract

The utility model discloses a dynamic vibration absorber structure with adjustable frequency, which comprises a plurality of mass blocks with different masses, so that the mass blocks with different masses correspond to different vibration absorber frequencies; the mass block mounting body is mounted in the center of the mass block in an embedded manner; the base mounting body is arranged at the upper end of the mass block mounting body; the upper end face of the base installation body is a base installation face, and a base installation hole is formed in the center of the base installation body. The dynamic vibration absorber structure is assembled and fixed to a base mounting hole through a bolt and a to-be-adjusted part of an automobile. Or the dynamic vibration absorber structure and the to-be-adjusted part of the automobile are adhered and fixed on the mounting surface of the base through glue. The vibrator structure provided by the utility model can be mounted at each position of an automobile chassis or an automobile body, is convenient to mount and dismount, simple in process, low in manufacturing cost and easy to implement, and can quickly adjust the frequency.

Description

Technical Field

[0001] The utility model relates to the technical field of passenger vehicles, in particular to a frequency-adjustable dynamic vibration absorber structure. Background Art

[0002] With the rapid development of the automobile industry, people have higher and higher requirements for automobiles. The NVH (Noise, Vibration, Harshness) performance of passenger cars has also become a key performance of automobiles. In recent years, the NVH performance of the whole vehicle has become one of the important research topics in the process of automobile research and development. In the road noise development and tuning stage, in view of the uncertainty of the vibration characteristic frequency of the test sample during the tuning process and the problem of multiple problem frequencies, the vibration absorbers with different rubber stiffness and different masses are used to quickly adjust the vibration absorbers of various frequencies to verify the NVH problem, saving time for vehicle development.

[0003] Based on the above technical problems, technicians in this field urgently need to develop a dynamic vibration absorber structure with adjustable frequency. Utility Model Content

[0004] The utility model aims to provide a dynamic vibration absorber structure with adjustable frequency, which can be installed at various positions of the automobile chassis or body, is easy to install and disassemble, has simple process, low production cost, is easy to implement, and can quickly adjust the frequency.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model discloses a frequency-adjustable dynamic vibration absorber structure, which comprises:

[0007] A mass block, wherein the mass block is configured as a plurality of mass blocks with different masses, so that the mass blocks with different masses correspond to different vibration absorber frequencies;

[0008] A mass block mounting body embedded in the center of the mass block; and

[0009] A base mounting body disposed on the upper end of the mass mounting body;

[0010] The upper end surface of the base mounting body is a base mounting surface, and a base mounting hole is formed at the center of the base mounting body;

[0011] The dynamic vibration absorber structure is assembled and fixed to the base mounting hole with the automobile part to be adjusted by bolts; or the dynamic vibration absorber structure is adhered and fixed to the base mounting surface with the automobile part to be adjusted by glue.

[0012] Further, the mass block is provided with two connecting bolts extending radially along the mass block;

[0013] The connecting bolt is threadedly connected to the mass block, extends to the mass block mounting body, and is connected to the mass block mounting body.

[0014] Furthermore, the edge of the mass block mounting body is smoothly transitioned by chamfering.

[0015] Furthermore, a rubber is provided on the upper end of the mass block mounting body;

[0016] The base mounting body is connected to the mass block mounting body through the rubber.

[0017] In the above technical solution, the utility model provides a frequency-adjustable dynamic vibration absorber structure, which has the following beneficial effects:

[0018] The dynamic vibration absorber structure of the utility model can quickly adjust the frequency of the dynamic vibration absorber by adjusting the fixing bolts to replace different mass blocks; the base mounting body is used to cooperate with the vehicle body to ensure installation and reliability. The vibrator structure can be installed at various positions on the chassis or vehicle body of the vehicle, is easy to install and disassemble, has a simple process, low manufacturing cost, is easy to implement, and can quickly adjust the frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. It is obvious that the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 A schematic structural diagram of a frequency-adjustable dynamic vibration absorber structure disclosed in an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of test data when the frequency of a vibration absorber of a dynamic vibration absorber structure with adjustable frequency disclosed in an embodiment of the utility model is adjusted to 86 Hz;

[0022] Figure 3 This is a schematic diagram of test data when the frequency of a vibration absorber of a frequency-adjustable dynamic vibration absorber structure disclosed in an embodiment of the utility model is adjusted to 45 Hz.

[0023] Description of reference numerals:

[0024] 1. Mass block; 2. Mass block mounting body; 3. Base mounting body; 4. Rubber; 5. Connecting bolts;

[0025] 301. Base mounting surface; 302. Base mounting hole. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] See also Figures 1 to 3 As shown;

[0028] A frequency-adjustable dynamic vibration absorber structure of this embodiment includes:

[0029] Mass block 1, where the mass block 1 is configured as a plurality of mass blocks 1 with different masses, so that different vibration absorber frequencies can be corresponded to by mass blocks 1 with different masses;

[0030] A mass block mounting body 2 embedded in the center of the mass block 1; and

[0031] A base mounting body 3 disposed on the upper end of the mass mounting body 2;

[0032] The upper end surface of the base mounting body 3 is a base mounting surface 301, and a base mounting hole 302 is formed at the center of the base mounting body 3;

[0033] The dynamic vibration absorber structure is assembled and fixed to the base mounting hole 302 with the automobile part to be adjusted by bolts; or the dynamic vibration absorber structure is adhered and fixed to the base mounting surface 301 with glue with the automobile part to be adjusted.

[0034] Specifically, this embodiment discloses a novel frequency-adjustable dynamic vibration absorber structure, which includes a mass block 1 and a mass block mounting body 2 mounted integrally with the mass block 1; in order to be able to cooperate with various parts of the vehicle to be adjusted, this embodiment is provided with a base mounting body 3 at the upper end, and the base mounting body 3 has two mounting methods, one is to connect with the base mounting hole 302 by bolts, and the other is to fix by gluing the base mounting surface 301. This embodiment is provided with mass blocks 1 of different masses, and the mass blocks 1 of corresponding masses can be replaced according to actual applications, thereby achieving the design requirements of adjustable frequency.

[0035] Preferably, the mass block 1 of this embodiment is provided with two connecting bolts 5 extending radially along the mass block 1;

[0036] The connecting bolt 5 is threadedly connected to the mass block 1 , and extends to the mass block mounting body 2 and is connected to the mass block mounting body 2 .

[0037] The base mounting hole 302 provided in the base mounting body 3 of the present embodiment can be installed and fixed to the corresponding position of the vehicle by means of bolts, thereby fixing the dynamic vibration absorber structure of the present embodiment; similarly, the base mounting surface 301 is fixed to the corresponding position by means of adhesive connection, thereby fixing the dynamic vibration absorber structure of the present embodiment.

[0038] Secondly, in this embodiment, the upper end of the mass block installation body 2 is provided with a rubber 4; the base installation body 3 is connected to the mass block installation body 2 through the rubber.

[0039] In this embodiment, a rubber 4 is further provided between the base mounting body 3 and the mass block mounting body 3. The stiffness of the rubber 4 is calculated based on the frequency to be adjusted. If one stiffness cannot meet the frequency to be adjusted, a plurality of rubbers 4 with different stiffnesses can be manufactured and vulcanized with the base mounting body 3 for selection.

[0040] Preferably, the edge of the mass block mounting body 2 of this embodiment is chamfered and smoothly transitioned. In order to facilitate the installation of the mass block 1, the edge of the base mounting body 3 of this embodiment is set to a chamfered and smoothly transition structure, and the whole matches the central hole of the mass block 1.

[0041] The mode of the vehicle component is measured in the whole vehicle state of the test vehicle, and the modal frequency of the component is obtained. This frequency is the frequency at which the component vibrates most, that is, the problem frequency that the vibration absorber needs to suppress. Select a suitable mass block 1 and fix it on the basic vibration absorber base to adjust the frequency of the vibration absorber to correspond to the problem frequency. Subsequently, the structure is bolted or glued to the automobile component to be adjusted through the base mounting hole 302 or the base mounting surface 301. At the same time, the installation position and installation angle of the vibration absorber are optimized to optimize the vibration suppression effect of the vibration absorber, and finally determine the parameters of the engineered dynamic vibration absorber. After completion, remove the dynamic vibration absorber structure for subsequent adjustment and use.

[0042] The vibration absorber of this embodiment can be installed on the chassis subframe of the vehicle to solve the low-frequency pressure noise problem in the vehicle. By absorbing the vibration of the subframe, the low-frequency noise in the vehicle is reduced, and the subjective feeling of the passengers in the vehicle is improved. It can be reused many times and has a low cost. By adjusting the connecting bolt 5 and replacing different mass blocks, the frequency of the vibration absorber can be quickly adjusted to reduce low-frequency noise of different frequencies, and the contribution of vibration absorbers of different frequencies to the noise in the vehicle can be quickly verified.

[0043] See also Figure 2 As shown, when the vehicle is driving on a rough asphalt road at a constant speed of 40km / h, adjusting the shock absorber frequency to 86Hz can reduce the 86Hz noise value of the rear passengers by 2dB (A), which can effectively reduce the 86Hz low-frequency noise of the rear passengers.

[0044] See also Figure 3 As shown in the figure, by adjusting the two connecting bolts to replace different mass blocks and adjusting the vibration absorber frequency to 45Hz, the 45Hz noise value of the rear passengers can be reduced by 4 when the vehicle is driving on a rough asphalt road at a constant speed of 40km / h.

[0045] dB (A), can effectively reduce 45Hz low-frequency noise of rear passengers.

[0046] In the above technical solution, the utility model provides a frequency-adjustable dynamic vibration absorber structure, which has the following beneficial effects:

[0047] The dynamic vibration absorber structure of the utility model can quickly adjust the frequency of the dynamic vibration absorber by adjusting the connecting bolt 5 to replace different mass blocks; the base mounting body 3 is used to cooperate with the vehicle body to ensure installation and reliability. The vibrator structure can be installed at various positions on the chassis or vehicle body of the vehicle, is easy to install and disassemble, has a simple process, low manufacturing cost, is easy to implement, and can quickly adjust the frequency.

[0048] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A dynamic vibration absorber structure with adjustable frequency, characterized in that: The dynamic vibration absorber structure comprises: A mass block (1), wherein the mass block (1) is configured as a plurality of mass blocks (1) with different masses, so that different vibration absorber frequencies can be corresponded to by the mass blocks (1) with different masses; A mass block mounting body (2) embedded in the center of the mass block (1); and A base mounting body (3) arranged on the upper end of the mass block mounting body (2); The upper end surface of the base mounting body (3) is a base mounting surface (301), and a base mounting hole (302) is provided at the center of the base mounting body (3); The dynamic vibration absorber structure is assembled and fixed to the base mounting hole (302) with the automobile part to be adjusted by means of bolts; or the dynamic vibration absorber structure is adhered and fixed to the base mounting surface (301) with the automobile part to be adjusted by means of glue.

2. The frequency-adjustable dynamic vibration absorber structure according to claim 1, characterized in that: The mass block (1) is provided with two connecting bolts (5) extending radially along the mass block (1); The connecting bolt (5) is threadedly connected to the mass block (1), extends to the mass block mounting body (2), and is connected to the mass block mounting body (2).

3. The frequency-adjustable dynamic vibration absorber structure according to claim 1, characterized in that: The edge of the mass block mounting body (2) is smoothly transitioned by chamfering.

4. The frequency-adjustable dynamic vibration absorber structure according to claim 1, characterized in that: The upper end of the mass block mounting body (2) is provided with rubber (4); The base mounting body (3) is connected to the mass block mounting body (2) via the rubber (4).

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