KR200148176Y1 - Hydraulic engine mounting of automobile - Google Patents

Abstract

The present invention discloses a fluid engine mounting of a motor vehicle. The disclosed subject matter, the upper bracket (1) fixed to the engine; An upper pipe (14) installed at the center bottom of the upper bracket (1); A first dustproof rubber 4 attached to the bottom of the upper bracket 1 along the outer circumference of the upper pipe 14; A lower bracket 5 spaced apart from and disposed with the first dustproof rubber 4 so as to be fixed to the lower outer portion of the first dustproof rubber 4 so as to form a space in which the fluid 13 is enclosed; A lower plate 6 having an upper portion fixed to a bottom surface of the lower bracket 5 and a lower portion fixed to a vehicle body; The first and second diaphragms 10, which are placed and fixed horizontally on the boundary between the lower plate 6 and the lower bracket 5, are formed with several orifices through which the fluid 13 passes and are spaced apart from each other. 11); A diaphragm plate 9 spaced apart from the lower portion of the second diaphragm 11; And a movable plate 12 interposed in the central space of the first and second diaphragms 10 and 11 and moving up and down in accordance with the flow of the fluid 13. The upper pipe 14 is lowered and extended into the space portion between the first dustproof rubber 4 and the first diaphragm 10, and the fluid 13 is formed on the outer periphery of the extension 15 of the upper pipe 14. Rotating in accordance with the flow is characterized in that the rotary plate 21, 22, 23 that is resonant action is fitted.

Description

Fluid Engine Mounting of Vehicles

The present invention relates to a fluid engine mounting of a vehicle, and more particularly to a fluid-mounted engine mounting to reduce the vibration and noise of the engine to the fluid.

Generally, in mounting an engine to a vehicle body, it is attached by fixing to several engine brackets attached to the engine and a support connected to the vehicle body by fixing means such as bolts. In such an engine mounting structure, it is important to ensure that vibrations and noise generated from an engine rotating at high speed are not transmitted directly to the driver.

To this end, in a general engine mounting structure, a dustproof structure that absorbs and suppresses vibrations and other noise generated from the engine is essentially provided. In such a dustproof structure, an annular anti-vibration rubber is generally used, and a fixing member fitted to the center of the anti-vibration rubber is connected to the vehicle body side bracket, and the outer bracket extending below the anti-vibration rubber is connected to the engine by several bolts. It consists of a structure that is fixed and installed on the bracket.

However, the above-described anti-vibration rubber alone is not enough to reduce vibration and noise of the engine. Recently, a method using a fluid has been commercialized.

In FIG. 1, a conventional fluid engine mounting structure is shown in cross section.

As shown, the upper bracket 1 is fixed to the engine by the upper bolt 2 installed in the center, and the upper stopper 3 is installed on the left side of the upper bolt 2 so as to face upward. have. A pipe 14 made of steel is provided at the center lower portion of the upper bracket 1 so as to provide a place for fastening the upper bolt 2.

The dustproof rubber 4 is attached to the bottom surface of the upper bracket 1, and the lower bracket 5 is inserted and fixed to the lower part of the dustproof rubber 4. As shown in FIG. The lower plate 6 which is fixed to the vehicle body by the lower bolt 7 is fixed to the lower part of the lower bracket 5 by press-fitting, and the lower stopper 8 is lowered to the lower side of the lower bolt 6 downward. It is installed to

Meanwhile, the first and second diaphragm plates 9 are horizontally disposed on the boundary line between the lower bracket 5 and the lower plate 6, and the orifices are formed on the diaphragm plate 9 while being spaced vertically. The diaphragms 10 and 11 are arrange | positioned. That is, the outer peripheries of the first and second diaphragms 10, 11 are fixed to the outer periphery of the diaphragm plate 9, and the center part is spaced apart so that the space part is formed.

In addition, the second diaphragm 11 is spaced apart from the diaphragm plate 9, and the first diaphragm 10 is spaced apart from the anti-vibration rubber 4, so that the space part is formed in each. Thus, the fluid 13 is enclosed in several places, especially the space part formed between the dustproof rubber 4 and the 1st diaphragm 10. As shown in FIG. On the other hand, while moving up and down with the flow of the fluid 13, the movable plate 12 for reducing the noise and vibration of the engine is interposed so as to be movable in the central space of the first and second diaphragms 10, 11 have. The movable plate 12 is also provided with several orifices through which fluid flows.

In this way, vibrations and noise generated in the engine are transmitted to the upper bracket 1 through the upper stopper 3. The upper bracket 1 compresses the anti-vibration rubber 1, so that the fluid 8 increases in speed while passing through the orifices of the first and second diaphragms 10, 11 and the movable plate 12. As it passes through and exits into a large space, the speed slows down.

By this action, vibration and noise generated in the engine are reduced.

Compared with the conventional anti-vibration rubber, the conventional fluid engine mounting as described above uses a fluid in addition to the anti-vibration rubber, so that the dynamic characteristic value is reduced during idling and high speed driving, thereby achieving quiet operation.

However, in the conventional fluid type engine mounting, as described above, quiet operation is performed due to a decrease in dynamic characteristics at idling or high speed driving, but in a high region of 3,500 rpm or more, the dynamic characteristic value is increased, which adversely affects the vehicle noise. There was this.

In addition, the linear section is present in the static characteristic value indicating the displacement of the fluid with respect to the load does not change over time, there was also a problem that severe vibration and noise occurs when starting or turning off.

Therefore, the present invention is designed to solve all the problems of the conventional fluid engine mounting, and can achieve a quiet driving environment by reducing the vibration and noise of the engine even when starting or turning off the engine and driving at a high speed of more than 3,500 rpm. It is an object to provide a fluid engine mounting of a motor vehicle.

1 is a cross-sectional view of a conventional fluid engine mounting.

2 is a cross-sectional view showing a fluid engine mounting according to the present invention.

3 is a graph comparing the static characteristics effect exhibited by the present invention with the conventional one.

4 is a graph comparing the dynamic characteristics effect exhibited by the present invention with the prior art.

* Explanation of symbols for main parts of the drawings

1: upper bracket 2: upper bolt

3: upper stopper 4: first dust-proof rubber

5: lower bracket 6: lower plate

7: lower bolt 8: lower stopper

9: diaphragm plate 10: first diaphragm

11: second plate 12: movable plate

13 fluid 14 upper pipe

15: extension portion 16: annular groove

17: 2nd dustproof rubber 18: lower pipe

21: first rotating plate 22: second rotating plate

23: third rotating plate

The present invention to achieve the above object, the upper bracket fixed to the engine; An upper pipe installed at the center bottom of the upper bracket; A first dustproof rubber attached to a bottom surface of the upper bracket along the outer circumference of the upper pipe; A lower bracket which is spaced apart from the first dustproof rubber so as to be formed at a lower outer portion of the first dustproof rubber, so that a space in which the fluid is sealed is formed; An upper plate fixed to an underside of the lower bracket and a lower plate fixed to a vehicle body; First and second diaphragms placed transversely on a boundary line between the lower plate and the lower bracket and formed with orifices through which the fluid passes and spaced apart from each other; A diaphragm plate spaced apart from and disposed below the second diaphragm; And a movable plate interposed in the central space of the first and second diaphragms, the movable plate being vertically moved in accordance with the flow of the fluid. Downwards and extends into the space between the partitions, it is characterized in that the rotational rotation of the several rotating plate is rotated in accordance with the flow of the fluid on the outer periphery of the extension of the upper pipe is resonant.

Preferably, the several rotating plate is characterized in that the diameter is arranged to be progressively longer toward the top.

In addition, a lower pipe is installed at the center of the lower plate, characterized in that the second dust-proof rubber is interposed between the lower bracket and the lower plate along the outer periphery of the lower pipe.

According to the configuration of the present invention described above, the rotating plate is rotated while the fluid passes through the first and second diaphragms and the movable plate by the Shanghai-dong of the first dust-proof rubber, and the engine not only by the fluid but also by the resonance action of the rotating plate Since the vibration energy of and the 2nd dustproof rubber were added to the 1st dustproof rubber. Acceleration and deceleration shocks and gear shifting shocks can be suppressed when starting or turning off the engine and at high speeds.

EXAMPLE

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

2 is a cross-sectional view showing a fluid engine mounting according to the present invention, and FIG. 3 is a graph comparing the static effect shown by the present invention with that of the prior art, and FIG. It is a graph.

For reference, in the description of the configuration of the present embodiment, the same parts as in the prior art described at the beginning of the specification are omitted and repeated descriptions are mainly described in order to avoid duplication of description. use.

As shown in FIG. 2, the upper pipe 14, which is attached to the lower center of the upper bracket 1 and provides a space for fastening the upper bolt 2, is lowered and extended into the space in which the fluid 13 is enclosed. do. That is, the extension part 15 of the upper pipe 14 enters into the space between the first dustproof rubber 4 and the first diaphragm 10 attached to the bottom surface of the upper bracket 1.

Three annular grooves 16 are formed at regular intervals on the outer circumference of the extension part 15, and in this embodiment, three rotary plates are rotated according to the flow of the fluid 13 in each of the annular grooves 16. From below, the first, second and third rotating plates 21, 22 and 23 are rotatably fitted. In particular, the diameter of each rotating plate 21, 22, 23 is arranged to gradually increase from bottom to top. Therefore, the diameter of the first rotating plate 21 is the shortest, the diameter of the third rotating plate 23 is the longest, so that the rotational speed of the first rotating plate 21 is fastest according to the flow of the fluid, and the third rotating plate 23 Will be the slowest.

In addition, the lower plate 6 which is fastened to the vehicle body by the lower bolt 7 is fixed to the bottom of the lower bracket 5, in the present invention, the first dustproof in the space between the lower bracket 5 and the lower plate 6 In addition to the rubber 4, the 2nd dustproof rubber 17 is interposed. Therefore, since the second anti-vibration rubber 17 is interposed, the lower pipe 18 is installed on the upper surface of the lower plate 6 so that a place for fastening the lower bolt 7 is formed, and this lower pipe 18 is provided. Along the outside of the second dust-proof rubber 17 is fitted.

On the other hand, along the interface between the lower bracket 5 and the lower plate 6, as described above in the prior art, the first and second diaphragms 10, 11 are arranged laterally, and the second diaphragm 11 The diaphragm plate 9 is disposed at a lower portion with a predetermined interval. In addition, the movable plate 12 which is moved up and down in accordance with the flow of the fluid in the central space portion of the first and second diaphragms 10 and 11 is interposed, and, of course, the movable plate 12 and the first and second diaphragms ( It is obvious that 10, 11 have several orifices through which the fluid passes.

Here, reference numerals 3 and 8 are upper and lower stoppers, which are a kind of pin.

Hereinafter, the operation of this embodiment configured as described above will be described in detail.

The vibration generated in the engine is transmitted to the upper bracket 1 to repeatedly stretch the first dustproof rubber 4. Accordingly, the fluid 13 moves up and down while passing through the orifices of the first and second diaphragms 10 and 11 and the movable plate 12, and in particular moves the movable plate 12 up and down. The vibration propagating through the fluid is reduced by the operation through the orifice. In addition, the vibration is reduced again by the second anti-vibration rubber 17 and transmitted to the lower plate 6.

More specifically, the second anti-vibration rubber 17, together with the first anti-vibration rubber 4, functions to suppress vibrations during static acceleration, i.e., when the engine is turned on or off, when acceleration and deceleration, and gear shifting, The static characteristics effect of the present invention with the addition of the second anti-vibration rubber 17 is shown in the graph of FIG.

In FIG. 3, the horizontal axis is the displacement of the engine mounting (mm) and the vertical axis is the static load (kgf) causing the displacement, the solid line shows the static characteristic effect according to the present invention, and the solid line shows the conventional static characteristic effect. .

As shown, when comparing the solid line and the dotted line for a constant load, it can be seen that the numerical value indicating the displacement of the solid line is larger. This means that the displacement of the fluid is large with respect to a certain load, and the absorption effect of vibration and noise is improved by the difference. In addition, while the linear section exists in the dotted line, the linear section does not exist in the solid line, so the noise of the vehicle body is hardly generated when starting or turning off.

On the other hand, due to the flow of the fluid up and down, the first, second and third rotating plate (21, 22, 23) is rotated to resonate, thereby blocking the propagation of vibration energy, in particular, the diameter The short first circuit board 11 reduces vibration noise in the high speed region of 200 to 300 Hz, and the third rotary plate 23 having the longest diameter reduces vibration noise in the low speed region of 100 to 150 Hz. The second rotating plate 22 having a diameter therebetween reduces vibration noise in a region of 150 to 200 Hz, which is a dependent region.

That is, the dynamic characteristics are compared with the conventional one in the graph of FIG. Here, the axis of abscissas is the axis representing the engine frequency (rpm), the axis of ordinates is the axis representing the dynamic load (kgf / mm), and the dotted line is conventional and the solid line is the line showing the dynamic characteristics effect according to the present invention.

As shown, it can be clearly seen that the dashed line representing the conventional one gradually increases as the engine speed increases, while the solid line representing the present invention decreases inversely. This effect is exerted by the resonant action of the first, second and third rotating plates 21, 22 and 23.

As described above, according to the present invention, the dynamic characteristics are improved by the resonant action of the rotating plates 21, 22, and 23 rotated in accordance with the flow of the fluid, and also the static characteristics are improved by the second anti-vibration rubber 17, When the engine is started or turned off and the vibration caused by the acceleration / deceleration and the gear shift in the high speed range can be reduced as much as possible, a quiet driving environment can be realized.

On the other hand, the present invention is not limited to the above-described specific preferred embodiments, anyone of ordinary skill in the art to which the present invention pertains without departing from the gist of the present invention claimed in the claims may be variously modified. will be.

Claims (3)

An upper bracket fixed to the engine; An upper pipe installed at the center bottom of the upper bracket; A first dustproof rubber attached to the bottom surface of the upper bracket along the outer periphery of the upper pipe: fixed to the lower outer portion of the first dustproof rubber, the center is spaced apart from the first dustproof rubber so as to form a space in which the fluid is sealed Lower bracket; An upper plate fixed to an underside of the lower bracket and a lower plate fixed to a vehicle body; First and second diaphragms placed transversely on a boundary line between the lower plate and the lower bracket, and formed with several orifices through which the fluid passes and spaced apart from each other; A diaphragm plate spaced apart from and disposed below the second diaphragm; And a movable plate interposed in the central space of the first and second diaphragms, the movable plate being vertically moved in accordance with the flow of the fluid. A fluid engine mounting of a vehicle, characterized in that several rotary plates are rotated downward and extended into a space between the diaphragms and rotated according to the flow of fluid on the outer periphery of the extension part of the upper pipe. 2. The fluid engine mounting of claim 1, wherein the several rotor plates are arranged so that their diameter is gradually longer upward. The fluid type engine of claim 1, wherein a lower pipe is installed at a central upper portion of the lower plate, and a second dustproof rubber is interposed between the lower bracket and the lower plate along an outer circumference of the lower pipe. Mounting.