KR20120045162A

KR20120045162A - Hydro mount

Info

Publication number: KR20120045162A
Application number: KR1020100106528A
Authority: KR
Inventors: 이중욱
Original assignee: 현대자동차주식회사
Priority date: 2010-10-29
Filing date: 2010-10-29
Publication date: 2012-05-09

Abstract

According to the present invention, an upper liquid chamber is formed at an upper side of a nozzle plate mounted therein, and a lower liquid chamber is formed at a lower side of the nozzle plate. In the nozzle plate, a mounting groove is formed on an inner circumferential surface thereof, and a disk-shaped membrane is coupled to the mounting groove, and the membrane is made of an elastic material and has an circumference constrained to the mounting groove; It is made of a material having a large density (density) and coupled to the annular portion; consists of.
The present invention having the above-described configuration, as a structure that allows the liquid to be enclosed through the projections or grooves formed in the membrane to induce the membrane to vibrate more efficiently by installing a relatively heavy mass in the center The dynamic characteristics have an improved effect.

Description

Hydro mount

The present invention relates to a hydro mount for a vehicle, and more particularly, to a hydro mount in which a mass part is mounted on a membrane to suppress noise and improve vibration insulation rate.

The engine of the vehicle not only vibrates structurally at all times but also vibrates according to the unevenness of the ground while the vehicle is running.

This vibration does not act alone, but a combination of factors occurs in all directions of up, down, left, and right directions.

In addition, since the engine is not separately installed in the vehicle body but also connected to a transmission device and an air conditioning device, vibration generated from the engine affects the entire vehicle.

Therefore, the engine is installed in the vehicle body frame through the engine mount so as to damp the vibration generated in the engine. The engine mount is fastened between the engine and the body frame, and a rubber type using a material's elastic force and a liquid encapsulation type are used in which the liquid is enclosed and damped vibration by the inertia effect of the liquid.

Dual, liquid-sealed engine mounts are called hydro engine mounts and are widely used in various vehicle types because they are configured to simultaneously attenuate vibrations in the high frequency region and the low frequency region.

Referring to FIG. 1, the conventional hydro mount has a structure in which the center bolt is fixed with a nut when the engine is mounted on the core but the engine is mounted on the core. The core is coupled to an insulator made of an elastic material, and a liquid (hydro liquid) is enclosed in an inner space formed by the insulator and the diaphragm. Then, a nozzle plate is mounted between the insulator and the diaphragm so that the interior is divided into an upper liquid chamber and a lower liquid chamber.

The nozzle plate is configured by combining the nozzle upper plate and the nozzle lower plate, is in close contact with the insulator fixed to the housing, and the membrane is mounted at the center. In addition, an opening hole is formed at one side of the nozzle upper plate to allow the liquid to flow therein, and the lower nozzle allows the liquid introduced from the opening hole of the nozzle upper plate to flow along the circumference, that is, a flow path along the inside of the rim. An annular flow path groove is formed to form. The end of the flow path groove has a perforated structure to be connected to the lower liquid chamber.

The membrane vibrates with the flow of liquid to damp the vibrations of the high frequency region introduced from the engine. Therefore, the membrane is mounted on the nozzle upper plate when the rim is mounted on the jaw formed in the nozzle lower plate is sandwiched between the membrane.

On the other hand, the engine vibration in the low frequency region is attenuated when the liquid flows through the flow path groove according to the elastic expansion and contraction of the insulator, while the engine vibration in the high frequency region is attenuated by the membrane vibrating by the viscosity and frictional force of the liquid.

And, as shown, by slightly reducing the thickness of the membrane to form a gap (gap) between the nozzle plate to induce a small amount of liquid flow and thereby further promote the vibration of the membrane. However, when the gap is formed to increase the vibration of the membrane, the damping efficiency is improved, but there is a problem in that noise is generated by the shock caused by the vibration. On the contrary, when the vibration is small, the noise is lowered, but the dynamic characteristics are deteriorated, thereby reducing the attenuation efficiency.

Accordingly, the present invention is directed to providing a hydro engine mount that suppresses noise generation and improves a vibration damping rate so as to improve mutually opposite physical characteristics.

The present invention for achieving the above object, the upper liquid chamber is formed on the upper side of the nozzle plate mounted therein and the lower liquid chamber is formed on the lower side through the flow path groove formed in the nozzle plate and the upper liquid chamber and In the hydro mount flowing through the lower liquid chamber, the nozzle plate has a mounting groove is formed on the inner circumferential surface and a disk-shaped membrane is coupled to the mounting groove, the membrane is made of an elastic material and the circumference is constrained in the mounting groove And a mass part made of a material having a greater density than the annular part and coupled to the annular part.

Preferably, the mass portion is made of a disk-shaped metal material, and the annular portion is made of a ring-shaped rubber material in which the mass portion is inserted in the center.

In addition, the annular portion is engaged and fixed in the mounting groove, and a groove is formed on the surface of the upper and lower surfaces so that a liquid flows between the upper liquid chamber and the lower liquid chamber, or a protrusion is formed to form a gap.

The present invention having the above-described configuration, by placing a relatively heavy mass in the center to induce the membrane to vibrate more efficiently, and the structure configured to flow through the projections or grooves formed in the membrane flow As a result, the dynamic characteristics are improved.

In addition, the annular portion has a structure in which an edge is fixed to the mounting groove formed by the nozzle lower plate and the nozzle upper plate, and does not cause noise generated in the conventional structure.

1 is a cross-sectional view and a partially enlarged view showing the inside of a conventional hydro mount,
2 is a cross-sectional view showing a perspective view of the membrane and the mounting state on the nozzle plate according to a preferred embodiment of the present invention;
3 is a cross-sectional view showing a perspective view of a membrane and a state mounted on a nozzle plate according to another embodiment of the present invention;
Figures 4a and 4b is a graph showing a comparison of the attenuation rate and dynamics data according to frequency between the mount with the conventional membrane and the mount with the membrane of the present invention.

The hydro mount of the present invention, like the conventional hydro mount, provides an upper liquid chamber and a lower liquid chamber partitioned by a nozzle plate composed of a nozzle upper plate and a nozzle lower plate in an inner space between the insulator and the diaphragm, and according to the elastic deformation of the insulator. It is configured to obtain a damping effect by the flow of the encapsulated liquid, the membrane is mounted on the nozzle plate is characterized in that the combined edge portion is fixed and the weight is combined.

Hereinafter, a hydro mount according to a preferred embodiment of the present invention will be described in more detail with reference to the drawings.

As shown in Figure 2, the nozzle plate is composed of a ring-shaped nozzle lower plate 30 and the nozzle upper plate 20, the inner peripheral surface mounting groove is formed so that the membrane 10 is coupled to the center. That is, when the membrane 10 is seated on the inner circumferential surface of the nozzle lower plate 30, the nozzle upper plate 20 is coupled to the nozzle lower plate 30 to fix the membrane 10 thereon.

The membrane 10 is a ring shape of an elastic material, as shown, preferably an annular portion 12 made of rubber and a mass portion 11 inserted into and fixed in the center of the annular portion 12. It is composed. The mass portion 11 is made of a metal material having a larger mass to volume than the annular portion 12. In addition, the annular portion 12 is formed with a protrusion 13 protruding from the surface of the edge portion inserted into the mounting hole.

Therefore, the membrane 10 is fixed to the nozzle plate, and has a structure in which a gap is formed in which encapsulated liquid can flow (to the upper liquid chamber and the lower liquid chamber). As another embodiment, as shown in FIG. 3, a gap 14 may be formed by forming a groove 14 on the surface of the annular portion 12 in place of the protrusion 13. In this case as well, the annular portion 12 is fixed to the mounting groove in order to prevent the generation of noise.

Membrane 10 configured as described above does not cause noise due to collision with the nozzle plate during vibration, and does not cause noise and vibrates so that the vibration of the engine can be more efficiently suppressed according to mass increase and mass concentration due to mass part 11 mounting. can do.

Meanwhile, although a plunger is conventionally mounted in the hydro mount to improve dynamic characteristics, the hydro mount according to the present invention has a damping efficiency in comparison with a conventional hydro mount without additional mounting of the plunger, as shown in FIG. 4A. This improved, as shown in Figure 4b it was confirmed that the dynamic characteristics and vibration damping efficiency in the frequency range of the practical range band. In particular, the vibration in the high frequency region mainly attenuated by the membrane showed a greatly improved effect.

Therefore, the hydro mount of the present invention reduces flow noise, which is a conventional problem, and improves dynamic characteristics, and thus, a cost reduction effect can be expected because similar or more attenuation effects can be obtained without installing an additional plunger.

As described above, the embodiments disclosed in the specification and the drawings are only presented as specific examples to aid the understanding of the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

10: membrane
11: annular part
12: mass part
13: turning
14: home
20: nozzle top plate
30: nozzle bottom plate

Claims

In the hydro mount in which the upper liquid chamber is formed on the upper side of the nozzle plate mounted therein, and the lower liquid chamber is formed on the lower side, and the sealed liquid flows through the upper liquid chamber and the lower liquid chamber through the flow path groove formed in the nozzle plate.
The nozzle plate has a mounting groove is formed on the inner circumferential surface and the membrane of the disk shape is coupled to the mounting groove,
The membrane is a hydro mount, characterized in that consisting of an elastic material and the annular portion circumferentially constrained in the mounting groove; and a mass portion made of a material having a greater density than the annular portion and bonded to the annular portion.

The hydro mount according to claim 1, wherein the mass part is made of a disc-shaped metal material, and the annular part is made of a ring-shaped rubber material in which the mass part is inserted in the center.

According to claim 2, wherein the annular portion is engaged in the mounting groove is fixed to the surface of the upper and lower surfaces so that the liquid flows between the upper liquid chamber and the lower liquid chamber (goove) in the groove (pipe) or projections protruding the gap (gap) Hydro mount, characterized in that formed.