阅读说明：本技术 用于车辆的发动机悬置 (Engine mount for vehicle ) 是由 金承原 于 2020-08-04 设计创作，主要内容包括：本公开提供一种用于车辆的发动机悬置,该发动机悬置包括：芯衬套,用于与车身组装；主橡胶,形成在芯衬套上；以及外管,附接到主橡胶并向下延伸。孔口主体安装在外管中并具有主流动路径,并且上板联接到孔口主体。上板具有与主流动路径连通的流体通过孔,并具有多个流体作用孔。一体板包括设置在上板的下方的膜片部以及在孔口主体的下方联接到孔口主体的下表面的边缘的隔膜部。下盖体包括具有气孔并设置在膜片部的下方的膜片支撑板以及覆盖隔膜部的盖体。(The present disclosure provides an engine mount for a vehicle, the engine mount including: a core bushing for assembly with a vehicle body; a main rubber formed on the core liner; and an outer tube attached to the main rubber and extending downward. An orifice body is mounted in the outer tube and has a primary flow path, and an upper plate is coupled to the orifice body. The upper plate has a fluid passing hole communicating with the main flow path and has a plurality of fluid applying holes. The integral plate includes a diaphragm portion disposed below the upper plate and a diaphragm portion coupled to an edge of a lower surface of the orifice body below the orifice body. The lower cover body includes a diaphragm support plate having an air hole and disposed below the diaphragm portion, and a cover body covering the diaphragm portion.)

1. An engine mount for a vehicle, comprising:

a core bushing for assembly with a vehicle body;

a main rubber formed on an outer surface of the core bushing;

an outer tube attached to an outer surface of the main rubber and extending downward;

an orifice body mounted on an inner surface of the outer tube and having a primary flow path for fluid communication between an upper fluid chamber and a lower fluid chamber;

an upper plate coupled to an upper portion of the orifice body, the upper plate having a fluid passing hole formed at a peripheral portion of the upper plate to communicate with the main flow path, and having a plurality of fluid applying holes formed at a center of the upper plate;

an integrated panel comprising: a diaphragm portion disposed below a central region of the upper plate to be movable up and down; and a diaphragm portion coupled to an edge of a lower surface of the orifice body to be located below the orifice body and integrally formed with the diaphragm portion; and

a lower cover body, comprising: a diaphragm support plate having an air hole formed therethrough and disposed below the diaphragm portion to be spaced apart from the diaphragm portion; and a cover body integrally formed with the diaphragm support plate and covering a lower portion of the diaphragm portion.

2. The engine mount of claim 1,

the upper fluid chamber is defined as a space between the main rubber and the upper plate, and the lower fluid chamber is defined as a space between the orifice body and the diaphragm portion.

3. The engine mount of claim 1,

a space between an upper surface of the membrane portion of the integrated plate and a lower surface of the upper plate forms a fluid chamber, fluid in the upper fluid chamber is introduced into the fluid chamber, and fluid is discharged from the fluid chamber into the upper fluid chamber, and a space between the lower surface of the membrane portion and an upper surface of the membrane support plate of the lower cover forms an air chamber, external air is introduced into the air chamber, and external air is discharged from the air chamber to the outside.

4. The engine mount of claim 1,

the fluid applying hole includes a circular first fluid applying hole formed at the center of the upper plate and a plurality of second fluid applying holes radially arranged at the outer circumferential portion of the first fluid applying hole.

5. The engine mount of claim 1,

an upper protruding end and a lower protruding end for limiting an up-and-down movement distance of the diaphragm portion are integrally provided on an upper surface and a lower surface of a center of the diaphragm portion of the integrated plate, respectively.

6. The engine mount of claim 5,

the upper protruding end is fitted into the first fluid acting hole of the upper plate to close the first fluid acting hole when the diaphragm portion moves upward, and the lower protruding end is fitted into the air hole of the diaphragm support plate of the lower cover to close the air hole when the diaphragm portion moves downward.

7. The engine mount of claim 6,

each of the upper protruding end and the first fluid applying hole has a trapezoidal cross section that is tapered upward, and each of the lower protruding end and the air hole has a trapezoidal cross section that is tapered downward.

8. The engine mount of claim 1,

a sealing end is included at an edge of an upper surface of the diaphragm support plate of the lower cover body, the sealing end being in sealable contact with an edge of a lower surface of the diaphragm portion to prevent fluid leakage.

9. The engine mount of claim 1,

the orifice body includes a fastening groove formed at a lower portion thereof, and the diaphragm portion of the integrated plate includes a fastening protrusion formed at an edge portion thereof, the fastening protrusion being fitted into the fastening groove.

10. The engine mount of claim 9,

a rigid reinforcement plate for reinforcing rigidity of the diaphragm portion is attached to an outer surface of the edge portion of the diaphragm portion.

11. The engine mount of claim 1,

the air hole formed at the diaphragm support plate of the lower cover body is a female screw hole, and a hollow screw for adjusting an up-and-down moving distance of the diaphragm part is screw-coupled to the female screw hole.

12. The engine mount of claim 11,

the dynamic characteristics of the diaphragm portion are adjusted by increasing or decreasing the size of a hole formed in the hollow screw.

13. The engine mount according to claim 1, further comprising a solenoid valve provided in a space formed by the diaphragm support plate of the lower cover and the cover to open and close the air hole.

Technical Field

The present disclosure relates to an engine mount for a vehicle, and more particularly, to an engine mount for a vehicle that integrally forms a diaphragm and a diaphragm with each other to reduce manufacturing costs and weight while enabling dynamic characteristics of the engine mount to be switchable in a self-switchable (self-switchable) manner.

Background

Generally, when a power train including an engine and a transmission is installed in an engine room, the power train is installed by an engine mount in order to effectively reduce vibration and noise transmitted to a vehicle body. The engine mount is classified into a fluid engine mount enclosing a fluid, a negative pressure type semi-active engine mount, an electronic semi-active engine mount, and the like, and may be configured in various structures other than the above-described engine mount.

The engine mount supports the powertrain in an engine compartment of the vehicle, isolates vibrations generated by the powertrain at idle and controls behavior of the powertrain as the vehicle travels. With respect to the dynamic behavior and damping value (damming value) of the engine mount, it is advantageous to reduce the dynamic behavior at the C2 frequency (typically at a frequency of about 30-50 Hz) to isolate the vibration of the powertrain at idle, and to increase the damping value of 8-15Hz to control the behavior of the powertrain while driving.

For this purpose, a negative pressure semi-active engine mount or an electronic semi-active mount is used as an engine mount for supporting the drive train. For reference, "negative pressure semi-active engine mount" refers to a fluid engine mount employing a negative pressure actuator that is turned on or off according to a running condition to change dynamic characteristics, and an electronic semi-active engine mount refers to an engine mount that is a fluid engine mount employing an electronic actuator that is turned on or off according to a running condition to change dynamic characteristics.

Although the semi-active engine mount has an advantage of switching between two power characteristics according to driving conditions, manufacturing cost and weight are increased since a negative pressure driver or an electronic driver must be added. Further, since a separate diaphragm for separating the upper fluid chamber from the lower fluid chamber is mounted on an orifice body (orifice body) mounted in the fluid engine mount or the semi-active engine mount, and a separate diaphragm for defining the lower fluid chamber is mounted on a lower portion of the orifice body, the number of parts and labor are increased, thereby increasing manufacturing costs.

The above information disclosed in this section is only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in this art.

Disclosure of Invention

The present disclosure provides an engine mount for a vehicle, in which a diaphragm and a diaphragm, which are basic components of an engine mount for supporting a powertrain of a vehicle, are integrally formed with each other to reduce manufacturing costs, weight, and labor, and to enable the dynamic characteristics of the engine mount to be switched in a self-switchable manner.

In one aspect, the present disclosure provides an engine mount for a vehicle, the engine mount comprising: a core bushing for assembly with a vehicle body; a main rubber formed on an outer surface of the core bushing; an outer tube attached to an outer surface of the main rubber and extending downward; an orifice body mounted on an inner surface of the outer tube and having a main flow path for fluid communication between the upper and lower fluid chambers; an upper plate coupled to an upper portion of the orifice body, the upper plate having a fluid passing hole formed at a peripheral portion of the upper plate to communicate with the main flow path, and having a plurality of fluid acting holes formed at a central region of the upper plate; an integrated plate including a diaphragm portion disposed below a central region of the upper plate to be movable up and down and a diaphragm portion coupled to an edge of a lower surface of the orifice body to be located below the orifice body and integrally formed with the diaphragm portion; and a lower cover including a diaphragm support plate having an air hole formed therethrough and disposed below the diaphragm portion to be spaced apart from the diaphragm portion, and a cover integrally formed with the diaphragm support plate and covering a lower portion of the diaphragm portion.

In an exemplary embodiment, the upper fluid chamber may be defined as a space between the main rubber and the upper plate, and the lower fluid chamber may be defined as a space between the orifice body and the diaphragm portion. In addition, a space between the upper surface of the diaphragm portion of the integrated plate and the lower surface of the upper plate may form a fluid chamber into which a fluid in the upper fluid chamber may be introduced and from which the fluid may be discharged into the upper fluid chamber, and a space between the lower surface of the diaphragm portion and the upper surface of the diaphragm support plate of the lower cover may form an air chamber into which external air may be introduced and from which the external air may be discharged to the outside.

The fluid applying hole may include a circular first fluid applying hole formed at the center of the upper plate and a plurality of second fluid applying holes radially arranged at the outer circumferential portion of the first fluid applying hole. An upper protruding end and a lower protruding end for limiting an up-and-down moving distance of the diaphragm portion may be integrally provided on an upper surface and a lower surface of a center of the diaphragm portion of the integrated plate, respectively.

Further, when the diaphragm portion moves upward, the upper protruding end may be fitted into the first fluid acting hole of the upper plate to close the first fluid acting hole, and when the diaphragm portion moves downward, the lower protruding end may be fitted into the air hole of the diaphragm support plate of the lower cover to close the air hole. In addition, each of the upper protruding end and the first fluid applying hole may have a trapezoidal cross section tapered upward, and each of the lower protruding end and the air hole may have a trapezoidal cross section tapered downward.

A sealing end may be provided at an edge of an upper surface of the diaphragm support plate of the lower cover body, the sealing end being in sealable contact with an edge of a lower surface of the diaphragm portion to prevent fluid leakage. In addition, the orifice body may have a fastening groove formed at a lower portion thereof, and the diaphragm portion of the integrated plate may have a fastening protrusion formed at an edge portion thereof, the fastening protrusion being tightly fitted into the fastening groove.

A rigid reinforcement plate for reinforcing rigidity of the diaphragm portion may be attached to an outer surface of the edge portion of the diaphragm portion. In addition, the air hole formed at the diaphragm support plate of the lower cover may be a female screw hole, and a hollow screw for adjusting an up-and-down moving distance of the diaphragm part may be screw-coupled to the female screw hole. The dynamic characteristics of the diaphragm portion can be adjusted by increasing or decreasing the size of the hole formed in the hollow screw. The engine mount may further include a solenoid valve disposed in a space formed by the diaphragm support plate of the lower cover and the cover to open and close the air hole.

Drawings

The above and other features of the present disclosure will now be described in detail with reference to exemplary embodiments, which are illustrated by way of example only in the accompanying drawings, given below, and which are therefore not limiting of the present disclosure, and wherein:

FIG. 1 is a cross-sectional view illustrating an engine mount according to an exemplary embodiment of the present disclosure;

FIG. 2 is an exploded perspective view illustrating an engine mount according to an exemplary embodiment of the present disclosure;

fig. 3A to 3D are sectional perspective views illustrating an assembly process of an engine mount according to an exemplary embodiment of the present disclosure;

FIG. 4 is an enlarged partial cross-sectional view illustrating operation of a diaphragm portion of an integrated plate of an engine mount at idle according to an exemplary embodiment of the present disclosure;

FIG. 5 is a graph illustrating dynamic characteristics of an engine mount when a diaphragm portion of an integral plate of the engine mount is operating at idle according to an exemplary embodiment of the present disclosure;

fig. 6 and 7 are partially enlarged sectional views illustrating a damping operation of an engine mount according to an exemplary embodiment of the present disclosure while driving;

FIG. 8 is a graph showing the dynamic characteristics of an engine mount during a damping operation while traveling according to an exemplary embodiment of the present disclosure;

fig. 9 is a partially enlarged view illustrating that a hollow screw for adjusting an up-down moving distance of a diaphragm portion according to another exemplary embodiment of the present disclosure is installed at a lower cover of an engine mount;

fig. 10 is a partially enlarged sectional view illustrating a position when the hollow screw for adjusting the up-and-down movement distance of the diaphragm portion shown in fig. 9 is tightened and loosened according to an exemplary embodiment of the present disclosure;

11A-11B are enlarged partial perspective views illustrating hollow screws having different sizes of inner diameters of an engine mount of an exemplary embodiment of the present disclosure; and

fig. 12 is a sectional view showing an example in which a lower portion of a lower cover of an engine mount is provided with a solenoid valve according to an exemplary embodiment of the present disclosure.

The reference numerals illustrated in the drawings include references to the following elements that are further discussed below:

it should be understood that the drawings are not necessarily to scale and that a somewhat simplified representation of various features is presented to illustrate the basic principles of the disclosure. The specific design features of the present disclosure, including, for example, specific dimensions, orientations, locations, and shapes, are set forth in part in the disclosure herein to be determined by the particular intended application and use environment. In the drawings, like reference numerals designate identical or equivalent parts of the present disclosure throughout the several views.

Detailed Description

It will be understood that the term "vehicle" or "vehicular" or other similar terms as used herein generally include motor vehicles, such as passenger vehicles including Sport Utility Vehicles (SUVs), buses, trucks, various commercial vehicles, watercraft including a variety of boats and ships, aircraft, and the like, and includes hybrid vehicles, electric vehicles, internal combustion, plug-in hybrid vehicles, hydrogen-powered vehicles, and other alternative fuel (e.g., resource-derived fuels other than petroleum) vehicles.

While the exemplary embodiments are described as using multiple units to perform the exemplary processes, it is understood that the exemplary processes may also be performed by one or more modules. Further, it is understood that the term controller/control unit refers to a hardware device comprising a memory and a processor. The memory is configured to store modules that the processor is configured to execute to perform one or more processes described further below.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Unless otherwise indicated or apparent from the context, as used herein, the term "about" is to be understood as being within the normal tolerance of the art, e.g., within 2 standard deviations of the mean. "about" can be understood to be within 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, 0.5%, 0.1%, 0.05% or 0.01% of the stated value. All numerical values provided herein are modified by the term "about," unless the context clearly dictates otherwise.

In the following, reference will now be made in detail to various embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings and described below. While the disclosure will be described in conjunction with exemplary embodiments, it will be understood that the description is not intended to limit the disclosure to those exemplary embodiments. On the contrary, the present disclosure is intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the present disclosure as defined by the appended claims.

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

Fig. 1 is a sectional view showing an engine mount according to an embodiment of the present disclosure. Fig. 2 is an exploded perspective view illustrating an engine mount according to an exemplary embodiment of the present disclosure. Fig. 3A to 3D are sectional perspective views illustrating an assembly process of an engine mount according to an exemplary embodiment of the present disclosure. In the drawings, reference numeral "10" denotes a core liner.

The bolt 12 for assembly with the vehicle body may be coupled to the core liner 10, and the core liner 10 may be provided with a main rubber 20 on an outer peripheral portion of the core liner 10 by vulcanization adhesion (curing adhesion) or the like to absorb vibration. The metal outer tube 22 may be attached to the outer surface of the main rubber 20 by vulcanization bonding. The outer tube 22 may extend downward to provide a mounting space for the orifice body 40 and the like. Thus, the orifice body 40, which may couple the upper plate 50 to the upper portion, is installed inside the outer tube 22.

The orifice body 40 has a circular ring shape, and a main flow path 42 for fluid communication between the upper fluid chamber 101 and the lower fluid chamber 102 is provided in the circumferential direction of the orifice body 40. A passage hole 44 communicating with the lower fluid chamber 102 may be provided at a predetermined position on the bottom surface of the orifice body 40. The orifice body 40 may be mounted on the inner surface of the outer tube 22.

The upper plate 50 may be disposed at an upper portion of the orifice body 40 and may be coupled to the orifice body 40. The upper plate 50 has a circular plate shape, and a fluid passing hole 52 may be provided at an outer circumferential portion of the upper plate 50, the fluid passing hole 52 communicating with the main flow path 42 of the orifice body 40. Further, a plurality of fluid applying holes 54 may be provided in a central region of the upper plate 50, and the upper plate 50 may be provided at an upper portion of the orifice body 40 and coupled with the orifice body 40. In particular, the upper plate 50 may be coupled with the orifice body 40 in such a manner that the coupling protrusion 46 formed on the upper end of the orifice body 40 is fitted into the coupling groove 56 formed in the bottom of the upper plate 50 in the circumferential direction.

The fluid applying holes 54 of the upper plate 50 may include: a first fluid applying hole 54-1 formed at the center of the upper plate 50; and a plurality of second fluid applying holes 54-2 formed radially through the upper plate 50 at the outer peripheral portion of the first fluid applying holes 54-1. An integral plate 60 made of a rubber material may be disposed below the orifice body 40 and the upper plate 50 to be spaced apart from the orifice body 40 and the upper plate 50. The integrated plate 60 may be integrally provided with a diaphragm portion 62 and a diaphragm portion 64.

More specifically, the integrated plate 60 may include: a diaphragm portion 62 disposed below a central region of the upper plate 50 and having a predetermined distance from the central region to be movable in an up-down direction; and a diaphragm portion 64 extending downward from the periphery of the diaphragm portion 62 and then horizontally while forming a ripple disposed below the orifice body 40 and having a predetermined distance from the orifice body 40.

In particular, a fastening groove 48 may be provided in an edge portion of the bottom surface of the orifice body 40, and a fastening protrusion 68 protruding upward may be provided in an edge portion of the diaphragm portion 64 of the integrated plate 60. Therefore, by fitting the fastening projection 68 into the fastening groove 48, the diaphragm portion 64 can be fixed to the orifice body 40. Since the diaphragm portion 64 may have a corrugated shape, it is necessary to reinforce the rigidity for maintaining the corrugated shape. Therefore, a rigid reinforcement plate 66 of a metal material for reinforcing the rigidity of the diaphragm portion 64 may be attached to the outer peripheral surface of the diaphragm portion 64.

Accordingly, a space between the lower surface of the main rubber 20 and the upper surface of the upper plate 50 may be defined as an upper fluid chamber 101, and a space between the lower surface of the orifice body 40 and the upper surface of the diaphragm portion 64 of the integrated plate 60 may be defined as a lower fluid chamber 102. Accordingly, the fluid in the upper fluid chamber 101 may move to the lower fluid chamber 102 through the fluid passing hole 52 of the upper plate 50, the main flow path 42 of the orifice body 40, and the passage hole 44 in this order. Instead, fluid in the lower fluid chamber 102 may move through the passage hole 44 of the orifice body 40, the main flow path 42, and the fluid passing hole 52 of the upper plate 50 in order to the upper fluid chamber 101.

A lower cover 70 including a film support plate 72 and a cover 74 integrally formed with the film support plate 72 may be installed below the integrated plate 60. The lower cover 70 may include: a diaphragm support plate 72 configured in a plate body structure having an air hole 71 formed therethrough, and the diaphragm support plate 72 may be disposed below the diaphragm portion 62 of the integrated plate 60 to be spaced apart from the diaphragm portion 62; and a cup-shaped cover 74 formed integrally with the diaphragm support plate 72 and covering a lower portion of the diaphragm portion 64 of the integrated plate 60.

Accordingly, a space between the upper surface of the diaphragm portion 62 of the integrated plate 60 and the lower surface of the upper plate 50 may be defined as a fluid chamber 103, fluid in the upper fluid chamber 101 is introduced into the fluid chamber 103, and fluid is discharged from the fluid chamber 103 into the upper fluid chamber 101, and a space between the lower surface of the diaphragm portion 62 and the upper surface of the diaphragm support plate 72 of the lower cover 70 may be defined as an air chamber 104, external air is introduced into the air chamber 104, and external air is discharged from the air chamber 104.

In particular, a sealing end 73 may be provided at an edge of an upper surface of the diaphragm support plate 72 of the lower cover 70, the sealing end 73 protruding upward to be sealably contacted with an edge of a lower surface of the diaphragm portion 62 to prevent the fluid in the fluid chamber 103 from leaking to the outside. An upper protruding end 62-1 and a lower protruding end 62-2 for limiting an up-and-down moving distance of the diaphragm portion 62 may be provided at an upper surface and a lower surface of the center of the diaphragm portion 62 of the integrated plate 60, respectively.

Therefore, when the diaphragm portion 62 is maximally moved upward when moving up and down due to vibration or the like, the upper protruding end 62-1 may be fitted into the first fluid application hole 54-1 of the upper plate 50, thereby closing the first fluid application hole 54-1. Meanwhile, when the diaphragm portion 62 is maximally moved downward, the lower protruding end 62-2 may be fitted into the air hole 71 of the diaphragm support plate 72 of the lower cover 70, thereby closing the air hole 71.

Each of the upper protruding end 62-1 and the first fluid applying hole 54-1 may have a trapezoidal cross section which is tapered upward, and each of the lower protruding end 62-2 and the air hole 71 may have a trapezoidal cross section which is tapered downward. Therefore, the upward movement distance of the upper projecting end 62-1 and the downward movement distance of the lower projecting end 62-2 can be restricted.

In fig. 1, the bracket 30 may surround the outside of the engine mount and may be connected to the engine. The engine mount according to the exemplary embodiment of the present disclosure, which is configured as described above, will now be described with respect to its operation.

Fig. 4 is a partially enlarged cross-sectional view illustrating an operation of the diaphragm portion 62 of the engine-suspension one-piece plate 60 at idle according to an exemplary embodiment of the present disclosure. Fig. 5 is a graph showing the dynamic characteristics of the engine mount when the diaphragm portion 62 of the integrated plate 60 of the engine mount operates at idle according to an exemplary embodiment of the present disclosure.

When vehicle vibration at idle or vehicle micro-vibration due to traveling on a good-condition road is applied to the engine mount, as shown in fig. 4, the diaphragm portion 62 of the integrated plate 60 can absorb the micro-vibration while moving up and down. Since the up-and-down movement distance of the diaphragm portion 62 is minimized when the diaphragm portion 62 absorbs the micro-vibration while moving up and down, the upper protruding end 62-1 is not tightly fitted into the first fluid application hole 54-1, and in addition, the lower protruding end 62-2 is not tightly fitted into the air hole 71 of the diaphragm support plate 72.

Therefore, when vibration of the vehicle at idle or micro-vibration of the vehicle due to running on a good-condition road (e.g., a flat road surface) is applied to the engine mount, as shown by arrows in fig. 4, the fluid in the upper fluid chamber 101 can be introduced into the fluid chamber 103 through the fluid passing hole 52 and the fluid applying hole 54 of the upper plate 50, and can act on the upper surface of the diaphragm portion 62 of the integrated plate 60. Accordingly, the membrane portion 62 can be moved downward, so that the air in the air chamber 104 can be discharged to the outside through the air hole 71.

In particular, as shown in the graph in fig. 5, the dynamic characteristics of the engine mount according to the exemplary embodiment of the present disclosure are similar to those of the conventional rubber engine mount. Since the diaphragm portion 62 of the integrated plate 60 absorbs Vibration while moving up and down within a small displacement range (e.g., ± 1mm or less) at idle, there is an effect of reducing Noise, Vibration, and Harshness (NVH).

Fig. 6 and 7 are partially enlarged sectional views illustrating a damping operation of an engine mount according to an exemplary embodiment of the present disclosure while driving. Fig. 8 is a diagram showing the dynamic characteristics of the engine mount according to the exemplary embodiment of the present disclosure at the time of the damping operation while running.

When large displacement vibration due to the vehicle running on a rough road (e.g., an uneven road surface) is applied to the engine mount, the fluid in the upper fluid chamber 101 may be introduced into the fluid chamber 103 through the fluid passing hole 52 and the fluid applying hole 54 of the upper plate 50 while the main rubber 20 is compressed, and act on the upper surface of the diaphragm portion 62 of the integrated plate 60. Therefore, as shown in fig. 6, the diaphragm portion 62 may be moved downward (e.g., 1mm or more), and the lower protruding end 62-2 may be fitted into the air hole 71, thereby closing the air hole 71.

Meanwhile, as shown in fig. 6, the fluid in the upper fluid chamber 101 may be introduced into the lower fluid chamber 102 through the orifice body 40 to buffer large displacement (downward) vibrations. In other words, since the fluid in the upper fluid chamber 101 flows along the main flow path 42 of the orifice body 40 through the fluid passing hole 52 of the upper plate 50 and is introduced into the lower fluid chamber 102 through the passage hole 44 of the orifice body 40, damping of large displacement (downward) vibration can be achieved.

Meanwhile, as shown in fig. 7, the fluid in the lower fluid chamber 102 may be introduced into the upper fluid chamber 101 through the orifice body 40 to buffer large displacement (upward) vibrations. In other words, since the fluid in the lower fluid chamber 102 flows along the main flow path 42 of the orifice body 40 through the passage hole 44, and the fluid passing through the upper plate 50 is introduced into the upper fluid chamber 101 through the hole 52, damping of large displacement (upward) vibration can be achieved.

In particular, as shown in fig. 8, the engine mount according to the exemplary embodiment of the present disclosure exhibits dynamic characteristics equal to or better than those of a conventional fluid engine mount when traveling on a rough road (e.g., large displacement vibration). Further, as shown in fig. 7, when a large displacement (upward) vibration is applied to the engine mount, the diaphragm portion 62 may move upward (e.g., 1mm or more), and the upper protruding end 62-1 may be fitted into the first fluid application hole 54-1 of the upper plate 50 and thus may be stopped.

Therefore, when large displacement vibration is applied to the engine mount, the up-down movement distance of the diaphragm portion 62 of the integrated plate 60 can be more easily restricted, and fluid flow between the upper fluid chamber 101 and the lower fluid chamber 102 is realized, so that a high damping effect of damping the large displacement vibration can be realized. According to another exemplary embodiment of the present disclosure, as shown in fig. 9 and 10, a female screw hole may be applied to the air hole 71 formed at the diaphragm support plate 72 of the lower cover 70, and a hollow screw 80 for adjusting the up-down movement distance of the diaphragm portion 62 of the integrated plate 60 may be screw-coupled to the female screw hole 76.

As shown in fig. 10, when the hollow screw 80 is tightened, the up-down distance between the hollow screw 80 and the lower protruding end 62-2 of the diaphragm portion 62 is reduced, and the up-down moving distance of the diaphragm portion 62 can be reduced accordingly. In contrast, when the hollow screw 80 is loosened, the up-down distance between the hollow screw 80 and the lower protruding end 62-2 of the diaphragm portion 62 increases, and the up-down moving distance of the diaphragm portion 62 can thus increase. Therefore, by adjusting the up-down movement distance of the diaphragm portion 62, the dynamic characteristics of the diaphragm portion 62 for absorbing the micro-displacement vibration and the dynamic characteristics of the diaphragm portion 62 for absorbing the large-displacement vibration can be controlled or adjusted according to the type of the vehicle.

As shown in fig. 11A and 11B, the dynamic characteristics of the diaphragm sheet portion 62 may be adjusted according to the type of vehicle by adjusting the size of a hole 82 formed at the center of the hollow screw 80. Specifically, as shown in fig. 11B, when the size of the hole 82 of the hollow screw 80 is reduced, the dynamic characteristics of the diaphragm member 62 can be adjusted to a damping degree suitable for absorbing vibration during running. In contrast, as shown in fig. 11A, when the size of the hole 82 in the hollow screw 80 is increased, the dynamic characteristic of the diaphragm portion 62 can be adjusted to a damping degree suitable for absorbing vibration at idle.

According to another exemplary embodiment of the present disclosure, as shown in fig. 12, an electromagnetic valve 90 for opening and closing the air hole 71 may be disposed in the hollow chamber 75 formed by the diaphragm support plate 72 and the cover 74 of the lower cover 70. Therefore, by adjusting the timing and the period for blocking the air hole 71 with the blocking lever (blocking rod)92 raised or lowered by the actuation of the electromagnetic valve 90, the dynamic characteristics of the diaphragm portion 62 of the integrated plate 60 can be controlled or adjusted according to the running condition and the driving condition of the vehicle.

With the above configuration, the present disclosure provides the following effects.

First, since an integrated plate having a diaphragm portion and a diaphragm portion, which are basic components of an engine mount, is used, manufacturing cost, weight, the number of parts, and labor can be reduced, and fluid leakage can be prevented as compared with a case where the diaphragm portion and the diaphragm portion are separately manufactured and assembled with each other.

Secondly, since the dynamic characteristics of the diaphragm portion of the integrated plate are switched in a self-switchable manner depending on whether the vehicle is idling or running (e.g., driven), it is possible to more easily realize a damping function of the engine mount for isolating vibrations generated by the powertrain at idling or controlling the behavior of the powertrain at running.

Third, since the up-down movement distance of the diaphragm portion of the integrated plate is adjusted using the hollow screw, the dynamic characteristics can be adjusted to be suitable for absorbing vibration by the engine mount.

Fourth, the dynamic characteristics can be adjusted to be suitable for absorbing vibration of the engine mount by selecting the inner diameter of the hollow screw according to the type of vehicle.

Fifth, since the solenoid valve may be further provided in the lower cover body, and the lower cover body defines the air chamber together with the diaphragm portion of the integrated plate, so that the solenoid valve opens or closes the air hole in the lower cover body according to the running condition, the dynamic characteristic of the diaphragm portion can be adjusted according to the running condition.

The present disclosure has been described in detail with reference to exemplary embodiments thereof. However, it will be appreciated by those skilled in the art that changes may be made in these exemplary embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined in the appended claims and their equivalents.