KR19990019398A - Damper for vehicle engine mounting - Google Patents

Abstract

The present invention relates to a damper of an engine mounting for a vehicle.

In the related art, since the vibration of the engine is simply absorbed by the rubber dustproof rubber, the vibration generated from the engine side is not completely absorbed by the damper and is transmitted to the vehicle body, causing the vehicle to shake.

In the present invention, the bolt 21a is formed on the upper case 21 to more effectively absorb and reduce the vibration transmitted from the engine by the damper made of various materials, and the buffer rubber 22 is formed on the bottom of the upper case 21. ), And the buffer rubber 22 forms the inlet groove 22a to fill the first buffer fluid 23. The separation plate 24 is installed on the bottom of the buffer rubber 22, and the center case 25 is installed on the outer surfaces of the separation plate 24 and the buffer rubber 22. In addition, the lower case 26 fitted in close contact with the central case 25 includes a diaphragm 27, a buffer space 28, and a second buffer fluid 29.

Therefore, the damper has a very useful effect of improving the quietness and running stability of the vehicle by more effectively reducing the vibration transmitted from the engine by several different materials.

Description

Damper for vehicle engine mounting

The present invention relates to a vehicle engine mounting, and more particularly, to a damper of a vehicle engine mounting that can more effectively absorb the vibration of the engine to improve the ride comfort of the vehicle.

In general, an engine for a vehicle is supported by a chassis frame or a body, and an anti-vibration device by an elastic body is necessarily installed in the mounting portion of the engine so as to prevent vibration generated from the engine from being transmitted to the chassis or the body.

Such an engine vibration isolator is called engine mounting or engine support, and performs an anti-vibration function to prevent the vibration of the engine from being transmitted to the vehicle body.

The engine mounting of the engine vibration isolator is made of a cushioning member such as rubber, and is connected to the engine side and the body side to absorb vibration and noise according to the action of compression, tension, and torsion of the rubber.

There are various types of engine mounting according to the vehicle type, and the typical ones include buffer rods to alleviate shocks, rubber mounting made of rubber and liquid in the rubber to increase vibration damping force. There is a compound mounting, and the addition of a vibration side weight (damper) to reduce the amplitude of the vibration side or to change the frequency to prevent resonance and the like has been applied.

The damper used for the engine mounting serves to support the engine to the vehicle body and to more effectively reduce the vibration and noise generated when driving the vehicle.

As shown in FIGS. 1 and 2, the damper of the conventional vehicle engine mounting has a cylindrical cylinder 3 having a substantially cylindrical shape, and a through hole 3a is formed at the center of the cylindrical bracket 3. . The reference protrusion 3b is formed at one side of the upper surface.

On the other hand, on the outer periphery of the cylindrical bracket (3) is provided with a rubber vibration-proof rubber 4, the dust-proof rubber 4 is formed with a space (4a) on both sides of the upper. In the plate 5 to which the anti-vibration rubber 4 is fitted, a fitting hole 5a is formed at the center portion, and fastening holes 5b are formed at both upper sides thereof so as to be engaged with the vehicle body 6.

Therefore, the damper 2 of the engine mounting inserts a separate bolt B into the through hole 3a in a state in which the reference protrusion 3b of the cylindrical bracket 3 is positioned at a predetermined part of the engine, and thus the engine bracket (1) and nuts (N) are fastened. In addition, the fastening hole 5b of the plate 5 is fastened with the vehicle body 6 and the bolt B or with the vehicle body 6 by a separate bracket to absorb vibration of the engine.

However, since the damper of the conventional vehicle engine mounting as described above can simply absorb the vibration of the engine by the anti-vibration rubber 4 made of rubber material, the vibration generated from the engine side is not completely absorbed by the damper 2. It was not transmitted to the vehicle body 6, the vehicle tremors occurred.

That is, since the damper 2 has a structure in which the anti-vibration rubber 4 is connected between the cylindrical bracket 3 and the plate 5, the damper 2 absorbs or reduces vibration transmitted from the engine to some extent, but one anti-vibration rubber ( 4) does not sufficiently absorb or reduce vibrations transmitted from the engine.

Therefore, the damper 2 does not absorb and reduce the vibration of the engine more effectively, resulting in a problem of deterioration of vehicle quietness, driving stability, and ride comfort, such as a vehicle shaking.

The present invention has been made to solve the above-mentioned conventional problems, an object of the present invention is to provide a damper of a vehicle engine mounting that can more effectively absorb, reduce the vibration transmitted from the engine by a damper made of various materials To provide.

1 is a perspective view showing a conventional damper,

2 is a cross-sectional view showing a conventional damper structure,

3 is a cross-sectional view showing a damper structure of the present invention.

* Explanation of symbols for main parts of the drawings

10; Engine bracket 20; Damper

21; Upper case 21a; volt

22; Buffer rubber 22a; Inflow Home

23; First buffer fluid 24; Separator

25; Center case 26; Lower case

26a; Bolt 27; Diaphragm

28; Buffer space portion 29; Second buffer fluid

30; Body N; nut

The damper of the vehicle engine mounting of the present invention for achieving the above object and the upper case is fixed so that the bolt protrudes in the direction of the engine bracket; A buffer rubber in which an inlet groove is formed in the center of the bottom surface; A first buffer fluid filled in the inlet groove of the buffer rubber; a separating plate in close contact with the bottom of the buffer rubber; A center case surrounding the outer surface of the separation plate and the buffer rubber; A lower space in which bolts protrude downward and a buffer space portion disposed between the diaphragm and the separation plate fixedly installed between the lower case and the center case; It characterized in that the second buffer fluid is filled between the diaphragm and the lower case. Hereinafter, a preferred embodiment of the damper of the vehicle engine mounting according to the present invention will be described in detail with reference to the accompanying drawings Same as

3 is a cross-sectional view showing a damper structure according to the present invention.

As shown in FIG. 3, the upper case 21 of the damper 20 is protruded upwardly so that the bolt 21a is inserted into the engine bracket 10 and fastened with the engine bracket 10 by a nut N or the like. Is installed. The buffer rubber 22 which is tightly fixed to the bottom of the upper case 21 has an inflow groove 22a formed at the center of the bottom thereof, and is formed of a buffer member such as a rubber.

The inlet groove 22a of the buffer rubber 22 fills the first buffer fluid 23, and the first buffer fluid 23 disperses vibrations or shocks transmitted from the upper and lower parts due to the characteristics of the fluid. And the bottom of the first buffer fluid 23, that is, the bottom of the buffer rubber 22 is installed in close contact with the separation plate 24, the first buffer fluid 23 is discharged to the outside by the separation plate 24 Will be prevented.

In addition, the separation plate 24 may have a cross-sectional shape in the shape of a concave lens so that the movement of the first buffer fluid 23 can be more easily moved. Do.

On the other hand, the outer case of the separating plate 24 and the buffer rubber 22 is installed in close contact with the central case 25, the central case 25 is approximately cylindrical to surround the separating plate 24 and the buffer rubber 22. It is formed into a phase. In addition, the lower case 26, which is tightly fixed to the bottom of the central case 25, has a bolt 26a protruding downward to be fixed to the vehicle body 30.

The diaphragm 27 fixedly installed between the lower case 26 and the center case 25 is formed in a thin film shape, and is bent to prevent breakage of the diaphragm 27 while easily absorbing vibration and shock. It is preferable to form.

Meanwhile, the buffer space portion 28 is positioned between the diaphragm 27 and the separator plate 24, and the buffer space portion 28 moves the diaphragm 27 and the separator plate 24 elastically. Since it provides a space for it, it can absorb vibrations and shocks. The second buffer fluid 29 is filled between the diaphragm 27 and the lower case 26.

Referring to the operation and effect of the present invention configured as described in detail as follows.

Vibration generated from the engine while driving the vehicle is transmitted to the engine bracket 10 or the engine mounting supporting the engine. At this time, the vibration transmitted from the engine is transmitted to the vibration, such as tremor, the tremor is generated by the repeated explosion stroke in the engine is transmitted to the damper 20 fixed between the engine bracket 10 and the vehicle body 30. .

However, since the damper 20 is made of several different materials as shown in FIG. 3, the damper 20 more effectively cancels or reduces the vibration transmitted from the engine side. That is, the upper case 21 of the damper 20 is primarily transmitted to the strong vibration from the engine bracket 10, it is to significantly reduce the large vibration by the rubber buffer of durable rubber material 22.

In addition, since the first buffer fluid 23, the separator and the buffer space portion 28 are formed at the lower side of the buffer rubber 22, the vibration transmitted through the above-described buffer rubber 22 is reduced while being reduced. In addition, since the first buffer fluid 23, the separator and the buffer space 28 are different from each other, that is, the mediums are different from each other, the vibration transmitted from the buffer rubber 22 is more effectively reduced.

On the other hand, since the diaphragm 27 and the second buffer fluid 29 having a thin film shape are provided at the lower side of the buffer space 28, the vibration transmitted from the engine is further reduced. In addition, the diaphragm 27 installed between the buffer space portion 28 and the second buffer fluid 29 is elastically moved according to vibration or shock between the two to reduce the vibration more effectively.

Therefore, the vibration of the engine is not transmitted to the vehicle body 30 fastened by the lower case 26 and the bolt 26a, thereby preventing the vehicle from shaking even after the engine is started.

On the other hand, the above embodiments are merely described one preferred embodiment of the present invention, the scope of application of the present invention is not limited to these, and can be changed as appropriate within the scope of the same idea. For example, the shape and structure of each component specifically shown in the embodiment of the present invention can be modified.

As described above, the present invention includes a buffer rubber, first and second buffer fluids, a buffer space portion, and a diaphragm between the upper case and the lower case of the damper to reduce vibration of the engine transmitted from the engine bracket. Therefore, the damper has a very useful effect of improving the quietness and running stability of the vehicle by more effectively reducing the vibration transmitted from the engine by several different materials.

Claims (1)

In the damper of the vehicle engine mounting is installed between the engine bracket and the vehicle body to reduce the vibration and noise generated while driving the vehicle while supporting the engine, An upper case 21 in which a bolt 21a is fixed to protrude in the direction of the engine bracket 10; A buffer rubber 22 fixed to the bottom surface of the upper case 21 and having an inflow groove 22a formed at the center of the bottom surface thereof; A first buffer fluid 23 filled in the inlet groove 22a of the buffer rubber 22; A separating plate 24 in close contact with the bottom of the buffer rubber 22; A center case 25 surrounding the outer surfaces of the separating plate 24 and the buffer rubber 22; A lower case 26 fixed in close contact with the bottom of the central case 25 and protruding a bolt 26a downward; A diaphragm 27 fixedly installed between the lower case 26 and the center case 25; A buffer space portion 28 positioned between the diaphragm 27 and the separator plate 24; A second buffer fluid (29) filled between the diaphragm (27) and the lower case (26); Vehicle engine mounting damper, characterized in that consisting of.