KR100262083B1 - Moving plate structure of hydraulic mount - Google Patents

Abstract

PURPOSE: A movable block structure of a fluid sealing mount secures a damping value for vibrations of various type generated from an engine, thereby optimizing the dynamic characteristics thereof on several conditions. CONSTITUTION: A movable block structure of fluid sealing mount comprises a body(20) and elastic films(12)(112) with a mutual space. The body(20) is mounted at the center of the movable block(10) and has two or more flow passages(11)(11') symmetrically about the center at the center portion thereof. The elastic films(12)(112) are mounted on the upper end portion and lower end portion of the movable block(10) and has flow passages(13)(113) at the center thereof. The flow passages(11)(11') of the body(20) and the flow passages(13)(113) of the elastic films(12)(112) are formed to cross each other. Thus, the indoor noise of a vehicle is reduced on a middle or high speed although the vibration frequency of the vehicle is increased.

Description

Moving plate structure of liquid-filled mount

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to liquid-mounted mounts in motor vehicles, and more particularly, to a movable plate structure of a liquid-filled mount capable of optimizing dynamic characteristics for each excitation condition by actively responding to amplitude and frequency inputs of large displacements.

As is well known, an engine of an automobile or a power plant including the engine and a transmission is supported by a vehicle body via a mount having a function of suppressing vibration and noise.

The mount minimizes the vibration or noise of the engine or the power plant so as not to be directly transmitted to the driver, thereby improving the riding comfort and quietness of the vehicle.

To this end, the mount is provided with a dustproof device. Known dustproof devices include the use of anti-vibration rubber and fluid-enclosed mounting devices that use a viscous fluid together.

Here, conventionally known structures of the fluid enclosed engine mount apparatus are disclosed in Japanese Unexamined Patent Publication Nos. 7-24673 and 7-24675.

Japanese Unexamined Patent Publication No. 7-24673 discloses an electrically viscous fluid-sealed cylindrical mount device that exhibits an effective dustproof effect against idling vibration and engine shake, and is simple in structure and excellent in manufacturability.

Japanese Laid-Open Patent Publication No. 7-24675 discloses a fluid-sealed cylindrical mounting apparatus which advantageously constitutes securing spring hardness in the mount axial direction without impairing the dust-proof dust-proof characteristics of the mount radial direction.

Also, as another example of the prior art, a fluid enclosed engine mount structure is well illustrated in FIG.

Reference numeral 1 in the drawing refers to the mounting bolt fixed to the engine side. The mount bolt 1 is fixed to the upper plate 5, and to the upper plate 5 is attached a dustproof rubber 51 which is compressed / expanded against vibration from the engine.

The anti-vibration rubber 51 is fixed to the upper end of the case 7 fixed to the vehicle body side. A decoupler 8 is provided inside the case 7 to partition the upper and lower fluid chambers 3 and 4. The fluid 2 is sealed in the upper space of the decoupler 8, and the fluid is also sealed between the lower space 4 of the decoupler 8 and the diaphragm 53.

In addition, an orifice 52 is formed in the decoupler 8.

The decoupler 8 is provided with a movable plate 10 at its central portion to correspond to dynamic characteristics and amplitude.

Unexplained symbol 6 is the body fixing bolt, 54 is the air chamber, 55 is the air passage.

In the conventional fluid-filled engine mount configured as described above, vibration from the engine is reduced by compression / expansion of the anti-vibration rubber 51, and again, the movable plate 10 and the diaphragm 53 of the fluid 3, the decoupler 8. It is canceled by passing through) and delivered to the body.

However, the fluid-mounted engine mount of the above-described prior arts absorbs vibration and noise of the engine based only on the simple moving plate 10 according to the elastic force of the anti-vibration rubber and the oil flow. have.

In addition, since the absorption and offsetting functions of the vibration are set in the prior art, there is a problem that active measures are difficult to cope with the vibration of the engine which varies during the driving of the vehicle.

For example, conventionally, there is a problem in that the attenuation value decreases with respect to the input of the amplitude and frequency of the large displacement.

The present invention has been proposed for the purpose of solving the above-mentioned problems of the prior art, and is active for automobiles to ensure the attenuation values for various types of vibrations generated from the engine, that is, amplitude and frequency input of large displacement. Provide engine mounts.

1 is a cross-sectional view showing a conventional fluid-filled engine mount.

2 is a cross-sectional view showing a movable plate of the engine mount according to the present invention.

Explanation of symbols on the main parts of the drawings

3, 4-fluid chamber 8-decouplers

10-movable board 11, 11'-flow path

12, 112-elastic plate 13, 113-flow path

51-dustproof rubber 52-orifice

53-diaphragm 54-air room

55-air flow path

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment for implementing this invention is demonstrated in detail based on an accompanying drawing.

Fig. 2 is a sectional view showing an active engine mount of a motor vehicle according to the present embodiment, showing an enlarged view of the main part of the present embodiment.

In describing the present embodiment, the same reference numerals are used for the configuration of the present embodiment, which is the same as the drawings cited in the prior art, and will not be described again for clarity of explanation.

The active engine mount of the present embodiment is installed between the vehicle body and the engine, as mentioned in the prior art.

That is, in this embodiment, the mount bolt 1 fixed to the engine side, the upper plate 5 fixed to the mount bolt 1, and the upper plate 5 fixed to the engine 5 are compressed / expanded against vibration from the engine. It is comprised by the dustproof rubber 51 which becomes.

In addition, the dust-proof rubber 51 is attached to the upper side to form a predetermined space therein, and the case 7 having a fixing bolt 6 fixed to the vehicle body side, and the D is installed inside the case 7 It is enclosed in the coupler 8 and the upper fluid chamber 3 which is an upper space of the decoupler 8, and enclosed in the lower fluid chamber 4 which is a space between the decoupler 8 and the diaphragm 53. It includes a fluid.

In addition, an orifice 52 is formed in the decoupler 8.

The decoupler 8 has a movable plate 10 formed at the center thereof to correspond to the dynamic characteristics and amplitude, and the movable plate 10 is symmetrical about the center at the central end of the main body 20 in a flow path ( 11) (11 ') are formed in two or more.

In addition, elastic membranes 12 and 112 are formed at the upper and lower ends of the movable plate in the center of the fluid liquid flow paths 13 and 113.

Therefore, the flow paths 11 (11 ') of the movable plate main body 20 and the flow paths (! 3) 113 of the elastic membranes 12 and 112 are alternately set in the vertical direction.

Hereinafter, the functional relationship of the present invention will be described.

In the engine mount, the present embodiment is coupled between the engine and the vehicle body, so that when the dynamic characteristics are rapidly increased or the vibration frequency is increased, the dust-proof rubber 51 formed with high axle is elastic.

In addition, the orifice 52 is attached to the partition member, and the orifice 52 forms small pores 62 and 72 to communicate with the upper and lower fluid chambers.

Accordingly, a flow to the orifice 52 occurs, in which a movable plate 10 is formed at the center of the decoupler 8 integrated with the orifice 52 in order to maximize the resistance and increase the attenuation value. Therefore, it corresponds to dynamic characteristics and amplitude.

In addition, the movable plate 10 is symmetric about the center at the center end of the main body 20 so that two or more flow paths 11 and 11 'are formed, and the elastic membrane 12 is disposed at the upper and lower ends of the movable plate. Since 112) forms the fluid-liquid flow paths 13 and 113 in the center, the flow path at this time is set to the clearance gap inclined in the vertical direction.

Moreover, since the movable plate 10 is formed in the center part of the decoupler 8, it sets to the clearance gap inclined in the up-down direction at this time.

Therefore, the operation example of the movable plate 10 can be represented as shown in Table 1 below, which can correspond to the dynamic characteristics and amplitudes of the present application through the gap.

TABLE 1

Vibration input Crevice (ι) Clearance (μ) Unamplified vibration open open Medium amplitude vibration close open Large amplitude vibration close close

As shown in the table above, when the vehicle is unamplified vibration, the gap (ι) is opened, and the gap (μ) is also opened to correspond to the dynamic characteristics and amplitude, and the gap (ι) during the medium amplitude vibration Can be closed, and the gap (μ) can be opened to correspond to dynamic characteristics and amplitude, and during large amplitude vibration, the gap (ι) can be closed, and the gap (μ) can be closed to correspond to dynamic characteristics and amplitude. Will be.

Based on the configuration of this embodiment described above, the engine mount is in addition to the vibration-proof rubber 51 and the vibration and noise attenuation of the fluid, by the movable plate 10 to maximize the flow resistance of the fluid in accordance with the state of the engine The vibration and noise of the engine are accurately and actively suppressed.

Through the embodiments described above, it can be seen that the engine mount of the vehicle according to the present invention substantially solves the problems of the prior art.

According to the present invention, it is possible to obtain an effect of increasing the attenuation value with respect to the amplitude and frequency of the large displacement generated from the engine.

That is, even when the dynamic characteristics are rapidly increased and the vibration frequency is increased, the indoor noise at the high speed of the vehicle can be reduced, and by adjusting the dynamic characteristics, the generation of the indoor noise of the vehicle can be suppressed.

On the other hand, the present invention is not limited to the above-described specific preferred embodiment, and any person having ordinary skill in the art to which the invention belongs without departing from the gist of the invention claimed in the claims, various modifications Would be possible.

Claims (2)

An upper plate fixed to the engine side, a dustproof rubber 51 connected to the upper plate and compressed / expanded against vibration of the engine, a case 7 to which the dustproof rubber is fixed and mounted on the vehicle body side, and an inner space of the case A decoupler 8 partitioned up and down, a fluid enclosed in a space between the upper plate and the decoupler and a space between the decoupler and the diaphragm 53, and an orifice 52 formed in the decoupler, In the liquid sealing mount in which the movable plate 10 is formed in the center of the decoupler 8, The movable plate 10 is provided with a space between the main body 20 and the elastic membrane 12, 112, but the fluid liquid flow path of the main body and the fluid liquid flow path of the elastic membrane are formed alternately. Plate structure of liquid sealing mount According to claim 1, wherein two or more flow paths (11, 11 ') are formed symmetrically about the center of the main body 20 of the movable plate 10, the upper and lower ends of the movable plate (18) 12) The movable plate structure of the liquid encapsulation mount, characterized in that the fluid-liquid flow paths 13 and 113 of the 112 are formed in the center.

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