KR20040049095A - Tuning tester for dynamic damper - Google Patents

Abstract

PURPOSE: A tuning tester for a dynamic damper is provided to prevent a transmission case and an adapter housing from being damaged by precisely performing a damper tuning test when performing a vibration noise test for a vehicle. CONSTITUTION: A dynamic damper tuning tester includes a coupling plate(11) having a coupling hole(11a). Non-linear rubber members(12) are installed at upper and lower portions of the coupling plate(11). A Ks value of the non-linear rubber members(12) is varied according to pressing force applied to the coupling plate(11). Mass members(13) are installed at upper and lower portions of the non-linear rubber members(12). A coupling unit is provided in order to integrally combine the coupling plate(11), the non-linear rubber members(12) and the mass members(13). The coupling unit includes a bolt(14) and a nut(15).

Description

TUNING TESTER FOR DYNAMIC DAMPER}

The present invention relates to a test apparatus for tuning a dynamic reducer, and more particularly, it is possible to easily and precisely damper tuning (damper tuning) when developing vehicle vibration noise, and to improve convenience according to the test, and a sample for damper tuning (sample The present invention relates to a test device for tuning a dynamic reducer to prevent vibration problems caused by deformation of various rubber mounts, without requiring manufacturing.

In general, a vehicle uses a dynamic damper to reduce the vibration of the vehicle body or the chassis parts.

The copper reducer is composed of a mass member and an elastic body in which rubber is usually used, and absorbs vibration of the vehicle body or the chassis part by the kinetic energy of the mass member.

In order to reduce vibration noise, it is very important to precisely tune the mass member and rubber properties in order to apply the copper reducer.

In general, in order to tune a copper reducer, it is necessary to make a sample of the frequency to be matched and evaluate it, and then when there is a need for fine tuning, there is a method of adjusting the mass member by removing or attaching the mass member first. A method of changing the stiffness is used.

However, the quality of the results depends on the experience of the tuning engineer, and it is difficult to determine the specifications because it is difficult to accurately measure the natural frequency of the copper reducer.

In addition, the natural frequency measurement of the dynamic reducer is also accurate and consistent because there are many differences depending on the magnitude of the force applied to the measurement by the impact hammer or the exciter, the amount of pre-load, and the frequency band used. There is a great need for a tuning test apparatus.

The present invention was created in order to solve the above problems, it is possible to easily and accurately damper tuning when developing vehicle vibration noise, improved convenience according to the test, do not need to manufacture a sample for damper tuning, appropriate replacement time The purpose of the present invention is to provide a test apparatus for tuning a copper reducer to prevent vibration problems caused by deformation of various rubber mounts.

Figure 1a is a cross-sectional view schematically showing the configuration of a test device for tuning the dynamic reducer according to the present invention.

1B is a plan view of FIG. 1A.

2 is a test sheet showing the properties of the rubber.

3 is a characteristic curve of rubber.

<Description of the symbols for the main parts of the drawings>

11. Plate

12. Rubber

13. Mass member

14. Bolt

15. Nut

The apparatus for tuning a dynamic reducer of the present invention for achieving the above object includes a plate for fastening the copper reducer; Nonlinear rubbers installed at the upper and lower portions of the plate and varying in the Ks value according to the pressing displacement; A mass member installed at the top and bottom of the rubber, respectively; It characterized in that it comprises a; fastening member for fastening the plate, the rubber and the mass member integrally.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1a is a cross-sectional view schematically showing the configuration of the test device for tuning the dynamic reducer according to the present invention, Figure 1b is a plan view of Figure 1a is shown.

Referring to the drawings, according to the present invention, the apparatus for tuning a copper reducer according to the present invention is provided with a plate 11 for fastening the copper reducer having a fastening hole 11a and the upper and lower portions of the plate 11. Nonlinear rubber 12 whose Ks value changes according to the pressing displacement, a mass member 13 provided at the top and bottom of the rubber 12, and the plate 11, the rubber 12 and the mass member 13, respectively. It comprises a fastening member for fastening integrally.

That is, two rubbers 12 and two mass members 13 are provided with the plate 11 therebetween.

The mass member 13 is made of steel, and the fastening member is made of a bolt 14 and a nut 15.

For example, an Excel spreadsheet program is prepared for the processing of test results tested using the test apparatus for tuning a dynamic reducer configured as described above.

Referring to the operation of the test device for tuning the dynamic reducer according to the present invention having the configuration as described above are as follows.

Referring again to the drawings, first, by adjusting the amount of pressing of the rubber 12, and experimentally finding the amount of pressing of the rubber 12 to minimize vibrations, and then setting the natural frequency of the tuning test apparatus as a specification. It demonstrates.

A characteristic test is first performed on the compression direction of the nonlinear rubber 12 to measure the Ks value. Next, the mass of the mass member 13 including the bolt 14 and the nut 15 is input.

In addition, the amount of pressing deformation of the rubber 12 is measured with the bolts 14 and fastened appropriately.

The amount of pressing of the rubber 12 is input into an Excel sheet column to calculate the natural frequency of the copper reducer.

The following describes how to determine how much the rubber 12 of the tuning test apparatus should be pressed while the frequency to be reduced is known.

A characteristic test is first performed on the compression direction of the nonlinear rubber 12 to measure the Ks value.

Next, the mass of the mass member 13 including the bolt 14 and the nut 15 is input. In addition, input the natural frequency of the desired copper reducer in the Excel sheet.

Then, the calculated amount of rubber (12) pressed in the tuning test device is applied to the test.

2 shows a sheet (Excel spreadsheet) showing the characteristics of the rubber 12.

In FIG. 2, a is input data showing the characteristics of the rubber 12, b is input data of the optimum deformation amount and mass member 13 obtained from the test, c is output data of natural frequency in the test apparatus, d Is the input frequency of the natural frequency and the mass member 13 of the desired vibration reducer, and e is the output data of the deformation amount of the rubber 12 from which the desired natural frequency comes out.

3 is a characteristic curve of the rubber 12 shown by the above Ks value relative to the deformation amount.

As described above, the apparatus for tuning a dynamic reducer according to the present invention has the following effects.

The damper tuning can be easily developed when developing vehicle vibration noise, and the development time can be improved and the development period can be shortened.

In addition, cost reduction can be achieved because there is no need for sample fabrication for damper tuning, and there are effects such as increased repeatability and reproducibility of the test.

In addition, it is possible to diagnose the abnormal balance of the propeller shaft of the vehicle to inform the appropriate replacement time, to prevent the occurrence of vibration problems caused by deformation of various rubber mounts, and to maintain the layout of the drive line.

The above effects can prevent damage to the case and the adapter housing of the transmission.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (3)

A plate for fastening the copper reducer; Nonlinear rubbers installed at the upper and lower portions of the plate and varying in the Ks value according to the pressing displacement; A mass member installed at the top and bottom of the rubber, respectively; And a fastening member for integrally fastening the plate, the rubber, and the mass member. The method of claim 1, The mass member is a test device for tuning the dynamic reducer, characterized in that made of steel. The method of claim 1, The fastening member is a tuning device for tuning the dynamic reducer, characterized in that consisting of bolts and nuts.