KR20040035262A - Fluid mount of vehicle - Google Patents

Abstract

PURPOSE: A fluid mount of a vehicle is provided to effectively reduce vibration noise produced when the engine of the vehicle is turned on and off and the vehicle travels at constant speed and at high speed, and to improve NVH(Noise Vibration Harshness) performance of the vehicle by making fluid filled in a mounting rubber smoothly flow by forcible force. CONSTITUTION: A fluid mount of a vehicle comprises a mounting rubber(21) forming a fluid space(21a) inside; an engine mounting stopper(22) one end of which is forcibly fitted into the upper inside of the mounting rubber and the other end of which is combined to an engine side; a vehicle body mounting stopper(23) combined to a vehicle body side while covering the outer peripheral surface and the lower end portion of the mounting rubber; a first partition plate member(25) fixed to the lower end side of the fluid space, to divide the fluid space into a lower space part(21b) and an intermediate space part(21c); a second partition plate member(26) fixed on the first partition plate member, to divide the intermediate space part into the intermediate space part and an upper space part(21d); a rotating pin(27) rotatably installed through the middle of the second partition plate member; first rotating vanes(28) combined to one end of the rotating pin and disposed in the intermediate space part; and second rotating vanes(29) combined to the other end of the rotating pin and disposed in the upper space part. The first partition plate member forms a decoupler(24) in the middle part to give stiffness and forms plural fluid holes, connecting the lower space part and the intermediate space part, and first orifices(25b) connected to the intermediate space part. The second partition plate member forms second orifices(26a) connecting the intermediate space part and the upper space part.

Description

Fluid mount of vehicle

The present invention relates to a fluid mount of an automobile, and in particular, the fluid can have a smooth flow even at high speeds, thereby effectively reducing vibration noise corresponding to high frequencies, thereby improving the overall performance of noise vibration (NVH) of the vehicle. A fluid mount of a vehicle.

In general, a type of mount used in a vehicle is classified into a dustproof mount that greatly reduces vibration noise using only rubber, and a fluid mount composed of a composite structure of rubber and a fluid. In this specification, a fluid mount used for engine mounting is used. Only the description will be given.

That is, the conventional fluid mount, as shown in Figures 1 and 2, the mounting rubber 11 is formed in the fluid space (11a) and the upper cap coupled to the upper portion of the mounting rubber 11 is pressed 12, the engine mounting stopper 13 coupled to the upper cap 12 and coupled to the engine (not shown) while covering a portion of the outer circumferential surface of the mounting rubber 11, and the mounting rubber 11 An upper space portion 11b and a lower space portion include a body mounting stopper 14 that is integrally coupled to the lower outer peripheral surface and coupled to the vehicle body (not shown), and a fluid space 11a formed in the mounting rubber 11. Plate member 15 fixed in the horizontal direction in the fluid space (11a) for partitioning into (11c), and the steel plate material is press-installed in the plate member 14 to give rigidity to the plate member 14 It consists of the decoupler 16.

Here, the diaphragm member () is made of a rubber material (rubber) material and the outer peripheral surface of the bent portion 14a of the vehicle body mounting stopper 14 together with the mounting rubber 11 forming the fluid space 11a. It is structured to be fixed while being press-fitted.

In addition, the diaphragm 15 and the decoupler 16 are formed with a plurality of fluid holes 15a connecting the upper space portion 11b and the lower space portion 11c of the fluid space 11a, An orifice 15b is formed inside the rim of the diaphragm member 15 corresponding to the periphery of the fluid hole 15a. The orifice 15b is not shown in the drawing, but It has a structure in which a plurality of connection passages connecting the upper space portion 11b and the lower space portion 11c are formed.

Accordingly, relatively small vibrations are generated when the engine is started on / off for driving the engine, and the vibration noise generated is an orifice of the diaphragm 15 in which the fluid existing in the fluid space 11a is generated. It is possible to effectively attenuate through the fluid resistance energy generated by passing through 15b.

In addition, the vibration noise generated during the constant speed driving (1000 rpm to 3500 rpm) is attenuated by the resistance energy of the fluid moving through the fluid hole 15a to the upper space portion 15b and the lower space portion 15c.

However, in the conventional fluid mount as described above, the flow of fluid is stopped during high speed driving (3500 rpm to 6000 rpm) of the vehicle so that resistance energy is not generated, and thus vibration noise generated during high speed driving is not attenuated. By doing so, there was a problem in that the overall vehicle NVH performance was also worse.

Accordingly, the present invention has been made to solve the above problems, by configuring the fluid filled in the mounting rubber to have a smooth flow by the forcible force when the vibration of the engine is delivered to the mounting rubber, It provides an automobile fluid mount that can effectively attenuate the vibration noise generated during on / off and constant speed driving as well as the vibration noise generated during high-speed driving, thereby improving the overall NVH performance of the vehicle. Has its purpose.

The present invention for achieving the above object, the mounting rubber is formed in the fluid space therein, the engine mounting stopper is coupled to the engine end while the other end is pressed into the upper end of the mounting rubber, the mounting rubber The body mounting stopper coupled to the vehicle body side while being coupled to surround the outer circumferential surface and the lower end of the body, and a decoupler for providing rigidity to the inside of the center are integrally formed to partition the fluid space into the lower space portion and the intermediate space portion of the fluid space. A first plate member having a plurality of fluid holes connecting the lower space portion and the intermediate space portion and a first orifice connected to the intermediate space portion, the intermediate space portion and the upper side of the intermediate space portion The intermediate space portion and the upper space portion is installed to be fixed on the first plate member for partitioning into space portion A second orifice for connecting a second orifice formed along an outer circumferential surface thereof, a rotating pin rotatably installed through the center of the second plate member, and coupled to one end of the rotary pin and positioned in an intermediate space portion. And a first rotary blade installed to be rotatable with the rotary pin, and a second rotary blade coupled to the other end of the rotary pin and positioned in an upper space and rotatably installed in the same direction as the first rotary blade. It is characterized in that the configuration.

1 and 2 are a perspective view and a longitudinal cross-sectional view for explaining a conventional fluid mount,

3 to 7 are longitudinal cross-sectional views and perspective views for explaining the fluid mount according to the present invention.

<Description of Symbols for Main Parts of Drawings>

21-mounting rubber 21a-fluid space

21b-Lower space 21c-Middle space

21d-Upper space part 21e-Pressing protrusion

22-Engine mounting stopper 23-Body mounting stopper

24-Decoupler 25-First Plate Member

25a-fluid hole 25b-first orifice

25c-First connecting passage 26-Second plate member

26a-2nd orifice 26b-2nd connecting passage

26c-3rd connecting passage 27-rolling pin

28-1st rotating wing 29-2nd rotating wing

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

3 to 7 are longitudinal cross-sectional views and perspective views for explaining a fluid mount according to the present invention, the fluid mount used for mounting the engine according to the present invention is shown in Figures 3 to 7, the fluid space therein ( A mounting rubber 21 having 21a) formed therein, an engine mounting stopper 22 having one end pressed into the upper end of the mounting rubber 21 and the other end coupled to the engine side, and an outer peripheral surface of the mounting rubber 21. And a body mounting stopper 23 coupled to the vehicle body side while being coupled to surround the lower end portion, and a decoupler 24 that provides rigidity to the inside of the center, while the fluid space 21a is formed in the lower space portion 21b. And a plurality of fluid holes 25a which are installed to be fixed to the lower end side of the fluid space 21a for partitioning into the intermediate space portion 21c and connect the lower space portion 21b and the intermediate space portion 21c. Connected with the intermediate space portion 21c A first plate member 25 having a first orifice 25b formed thereon, and a first plate member 25 for dividing the intermediate space portion 21c into an intermediate space portion 21c and an upper space portion 21d. A second plate member 26 having a second orifice 26a connected to the intermediate space portion 21c and the upper space portion 21d formed along an outer circumferential surface thereof and installed to be fixed on the second plate member 26; The rotary pin 27 is rotatably installed to penetrate through the center of the 26, and is coupled to one end of the rotary pin 27 to be rotatable with the rotary pin 27 while being positioned in the intermediate space portion 21c. The second rotary blade 28 is installed, and the second coupled to the other end of the rotary pin 26 is located in the upper space portion 21c and rotatably installed in the same direction as the first rotary blade 28 It consists of a rotary blade (29).

Here, the fluid hole 25a penetrates the central portion of the first plate member 25 in the longitudinal axis direction from the lower space portion 21b to the first plate member 25 as shown in FIGS. 3 to 5. It is formed to be connected to the intermediate space portion 21c through the gap (C) between the upper end side of the decoupler 24 penetrated, the first orifice 25b corresponds to the circumference of the fluid hole 25a It is formed therein along the edge of the first plate member 25, the first orifice 25b is the intermediate space portion (21c) through the first connecting passage (25c) formed in the first plate member 25 The fluid mount of the vehicle, characterized in that it is connected to.

The second orifice 26a includes a plurality of second connection passages 26b connected to the intermediate space portion 21c and a plurality of upper space portions 21d as shown in FIGS. 3 to 7. Three third connection passages 26c are alternately arranged.

In addition, the upper surface of the fluid space 21a connected to the engine mounting stopper 22 is formed in a conical shape around the engine mounting stopper 22 as shown in FIGS. 3 to 7. A plurality of pressurizing protrusions 21e for applying a pressing force to the flow of the fluid are radially formed around the engine mounting stopper 22.

On the other hand, the shape of the first rotary blade 28 as shown in Figures 3 and 6 when the rotary pin 27 is rotated in one direction flow of fluid from the intermediate space portion 21c to the upper space portion ( 21d) is formed in a shape capable of guiding, and the shape of the second rotary blade 29 is a pressure projection (21e) for moving the fluid moved to the upper space (21d) as shown in Figs. Is formed in a shape that can be moved to the upper surface of the formed fluid space (21a).

Accordingly, relatively small vibrations are transmitted through the mounting rubber 21 at the time of turning on / off the engine for driving the engine, and the fluid existing in the fluid space 21a is first orifice 25b. You have a flow that flows through).

Accordingly, the micro vibration noise generated when the start-up is turned on / off is effectively attenuated through the fluid resistance energy generated by the fluid passing through the first orifice 25b.

In the constant speed driving (1000rpm to 3500rpm), a vibration larger than the vibration generated at the start / on of the start is transmitted through the mounting rubber 21, and at this time, the fluid space 21a The fluid present therein has a flow that moves from the lower space portion 21b to the intermediate space portion 21c through the fluid hole 25a formed in the first plate member 25.

Accordingly, the vibration noise generated during the constant speed driving is effectively attenuated by the resistance energy of the fluid generated by the fluid passing through the fluid hole 25a formed in the first plate member 25.

Here, when the fluid existing in the fluid space 21a has a flow to be moved to the intermediate space portion 21c according to the magnitude of vibration transmitted to the mounting rubber 21, the fluid is the intermediate space portion 21c. Strike the first rotary blade 28 installed in the), and thus the first rotary blade 28 is rotated in one direction in the intermediate space (21c) around the hinge pin (27). In addition, the second rotary blade 29 is rotated in the same direction as the first rotary blade 28 in the upper space portion 21d.

As such, when the first and second rotary blades 28 and 29 constituting the fluid mount rotate in accordance with the flow of the fluid, the flow of the fluid may be forced even when the vehicle is driven at a high speed (3500 rpm to 6000 rpm). Since it is possible to solve the conventional problem that the fluid maintains the stationary state, the fluid having a forced flow by the first and second rotary blades (28,29) according to the friction energy due to the rotational resistance Will be generated.

Therefore, the vibration noise of the high frequency generated during the high-speed driving is effectively attenuated by the friction energy due to the rotational resistance generated at this time while the fluid is moved from the intermediate space portion 21c to the upper space portion 21d.

As such, when the structure of the fluid mount used for mounting the engine is configured as described above according to the present invention, when the vibration of the engine is transmitted to the mounting rubber 21, the fluid filled in the fluid space 21a By forcibly having the flow by the first and second rotary vanes 28 and 29, it is possible not only to effectively attenuate the vibration noise generated when the on / off of the start and the constant speed driving, but also at high speed. Vibration noise generated during driving can also be effectively attenuated, thereby improving the overall vehicle's NVH performance and increasing the consumer's preference for the vehicle.

As described above, according to the present invention, the vibration noise generated during the on / off of the start, the constant speed and the high speed driving is effectively attenuated, thereby improving the overall vehicle NVH performance while The effect of the consumer's preference is increased.

Claims (5)

A mounting rubber 21 having a fluid space 21a formed therein, an engine mounting stopper 22 having one end pressed into the upper end of the mounting rubber 21 and the other end coupled to the engine side, and the mounting rubber A body mounting stopper 23 coupled to the vehicle body side while being coupled to surround the outer circumferential surface and the lower end of the 21 and a decoupler 24 for providing rigidity to the inside of the center are integrally formed and the fluid space 21a is lowered. In order to partition into the space portion 21b and the intermediate space portion 21c, it is installed to be fixed to the lower side of the fluid space 21a, and a plurality of fluids connecting the lower space portion 21b and the intermediate space portion 21c. A first plate member 25 having a hole 25a and a first orifice 25b connected to the intermediate space portion 21c, and the intermediate space portion 21c as an intermediate space portion 21c and an upper space portion. While being fixed to the first plate member 25 for partitioning into 21d. The second orifice 26a connecting the intermediate space portion 21c and the upper space portion 21d is formed along the outer circumferential surface of the second plate member 26 and through the center of the second plate member 26. Rotating pin 27 that is rotatably installed, and the first rotary blade coupled to one end of the rotating pin 27 and positioned in the intermediate space 21c and rotatably installed together with the rotating pin 27 ( 28 and a second rotary blade 29 coupled to the other end of the rotary pin 26 and positioned in the upper space portion 21c and rotatably installed in the same direction as the first rotary blade 28. The fluid mount of the motor vehicle. The decoupler 24 according to claim 1, wherein the fluid hole 25a penetrates the central portion of the first plate member 25 in the longitudinal axis direction from the lower space portion 21b to penetrate the first plate member 25. It is formed so as to be connected to the intermediate space portion 21c through the gap (C) of the upper end side, the first orifice 25b is the first plate member 25 corresponding to the circumference of the fluid hole (25a) It is formed therein along the edge of the, the first orifice (25b) is formed to be connected to the intermediate space portion (21c) through the first connecting passage (25c) formed in the first plate member 25 A fluid mount of a vehicle characterized by the above-mentioned. According to claim 1, The second orifice (26a) A plurality of second connecting passages (26b) connected to the intermediate space portion (21c) and a plurality of third connection passages connected to the upper space (21d) ( 26c) are alternately arranged to form a fluid mount of an automobile. The method of claim 1, wherein the upper surface of the fluid space (21a) connected to the engine mounting stopper 22 is formed in a conical shape, the conical surface has a plurality of pressing projections (21e) for applying a pressing force to the flow of fluid. The fluid mounting of the vehicle, characterized in that formed radially around the engine mounting stopper (22). The shape of the first rotary blade 28 is capable of guiding the flow of fluid from the intermediate space portion 21c to the upper space portion 21d when the rotary pin 27 is rotated in one direction. It is formed in the shape, the shape of the second rotary blade 29 is formed in a shape capable of moving the fluid moved to the upper space portion 21d to the upper surface of the fluid space (21a) formed with the pressing projection (21e). Fluid mount of a vehicle, characterized in that.