KR20180028608A - Reconfigurable engine mount for vehicles - Google Patents

Abstract

The present invention relates to a reconfigurable engine mount (1) for vehicles, which is excellent in noise, vibration and harshness (NVH), ride and handling (R&H), and ride performance by easily changing rigidity and a hydro frequency. The reconfigurable engine mount (1) comprises a cover unit (100), a rubber unit (200), a hydro unit (300), and a bracket (400) that are assembled by a coupling unit (500), and is configured to change the hydro frequency by rotation of each unit, thereby improving the NVH, R&H, and ride performance. The coupling unit (500) includes: the cover unit (100) having first and second coupling parts (110, 120), which are provided at an inner lower portion to be concentric but have different inner diameters, and a third coupling part (130) which is provided at the outer middle portion; the rubber unit (200) having a first male screw (201) which is formed at a lower end to be coupled to the first coupling part (110); the hydro unit (300) having a second male screw (301) which is formed on the outer side thereof to be coupled to the second male part (120) after the rubber unit (200) is coupled; and the bracket (400) having a female thread (401) which is formed on the inner side thereof to be coupled to the third coupling part (130).

Description

≪ Desc / Clms Page number 1 > Reconfigurable engine mount for vehicles &

The present invention relates to a variable engine mount for a vehicle. More specifically, the present invention relates to a variable engine mount for a vehicle which is excellent in noise and vibration (NVH), driving sensation (R & H), and ride performance by easily changing rigidity and hydro frequency.

BACKGROUND ART [0002] Generally, in an engine of an automobile, vibration and noise are generated due to vertical reciprocating motion of a piston and a connecting rod provided in an automobile, rotational inertia of a crankshaft connected to a connecting rod that reciprocates vertically, and shaking generated in a longitudinal direction when the crankshaft rotates.

For this reason, the engine is mounted on the vehicle body using a rubber-made engine mount having a predetermined elasticity in order to prevent vibration and noise generated from being transmitted to the vehicle body.

However, the rubber mount engine mount exhibits excellent absorption and damping performance with respect to high frequency and low amplitude vibration among the vibrations generated when the engine is started. However, since the vibration mount with high amplitude and low amplitude There is a disadvantage in that the vibration on the low frequency large displacement can not all be sufficiently satisfied.

Therefore, a fluid-sealed engine mount capable of absorbing and attenuating vibrations over a wide range including vibrations of a high-frequency undrained width and vibrations of a low-frequency large-side vibration input to the engine mount according to the operation of the engine is used.

In recent years, active mounts, semi-active mounts, and the like, which can prevent degradation of NVH (Noise, Vibration, Hardness) in order to improve fuel efficiency of automobiles, have been widely used.

Such a semi-active mount is disclosed in Korean Patent Laid-Open Nos. 10-2013-0003749 and 10-2013-0003751.

Semi-active mounts usually control the dynamic characteristics of mounts by ON / OFF method.

These semi-active mounts are divided into a volume-stiffness method and a bypass method.

In general, a diesel engine mainly uses a bypass system that exhibits low characteristics (0.6 magnitude) in a low frequency range (20 to 40 Hz).

This is because the bypass method has the advantage of maximizing the idle performance by having lower dynamic characteristics in the low frequency region compared to the volume stiffness method (the advantage of volume stiffness is that the high frequency dynamic characteristic is lower than the bypass, The characteristic is higher than the bypass.

The most common type of by-pass type is vacuum pressure (intake manifold), which has several disadvantages such as layout and damage to backpressure.

On the other hand, the electronic type compared to the vacuum pressure does not affect the output because it uses the electromagnetic force generated by the vehicle, so that the combustion pressure is not affected and the layout of the wire (wiring) is more advantageous than the hose for the vacuum pressure transmission And the application is gradually increasing.

As an example, Korean Patent Publication No. 10-1628532 entitled "Active engine mount for automobile" is disclosed.

The configuration will be described with reference to FIG.

An upper body portion 12 having a main rubber 10 and an upper liquid chamber 11 and a lower body portion 13 coupled to a lower portion of the upper body portion 12. The upper and lower body portions 12, An orifice disc 16 which is installed inside the upper liquid chamber 11 and the lower liquid chamber 14 and has an orifice 15 for guiding fluid flow between the upper and lower liquid chambers 11 and 14, A diaphragm 17 provided at the lower part of the orifice disc 16 inside the lower body part 12 and 13 and constituting the lower liquid chamber 14 and a plunger 18 installed inside the lower body part 13 And a semi-active part 19 which is in contact with the center of the diaphragm and which is turned on and off by an electromagnet type. The semi-active part 19 is supported at the center of the diaphragm side and connected to the bottom part of the switching valve 21, A fork 23 constituting the chamber 22 is constituted.

Therefore, in the automotive engine mount configured as described above, the ring-shaped vibrating plate 24 is provided on the upper surface of the orifice disk 16, and a section disposed at the edge of the orifice 15 is covered. A fluid inlet / outlet hole 25 is formed at the end of the edge section of the orifice 15 and a center section of the orifice 15 communicates with the upper liquid chamber 11. The fluid flows from the upper liquid chamber ↔ orifice center ↔ orifice ↔ It is possible to move between the upper liquid chamber 11 and the lower liquid chamber 14 while moving along the path of the fluid inlet / outlet hole < - >

A closed air chamber 22, which can serve as an air spring, can be formed between the switching valve 21 and the fork 23.

The switching valve 21 and the fork 23 can move up and down according to the plunger operation during the ON / OFF operation of the semi-active 19 to open or close the hole 20 in the orifice disc 16 do.

However, the above-mentioned automotive engine mount requires a long assembly time and is difficult to produce a sample.

That is, it is necessary to change the mount rigidity for the NVH development and the hydro frequency for the development of the ride performance.

The current tuning method is to create a rigidly modified mount sample -> NVH development -> Hydro tuning frequency change sample production -> Ride development -> Engine mount gap change sample production -> Ride development -> NVH performance test.

In this case, in order to perform the performance test, performance evaluation can be performed by changing only some of the mount design factors, so that a plurality of engine mount samples are required for various performance verification.

In addition, it is difficult to maintain the consistency of the sample, and it is difficult to change only the hydro rubber because it is necessary to keep the same in the rubber characteristic.

In addition, a sample preparation period is required, and it usually takes about two weeks to obtain a tuning sample.

Also, it is difficult to develop integrated performance. Especially, it is difficult to select NVH and ride performance integrated sample

Also, it is difficult to set rubber second stiffness. Generally, there is a problem that repeated trial and error is repeated for detailed setting.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method of easily assembling a cover part, a rubber part, a hydro part, and a bracket.

1. Korean Registered Patent No. 10-1428277 (published on Aug. 1, 2014)

1. Korean Patent No. 10-1288995 (published on July 17, 2013)

1. Korean Published Patent Application No. 10-2014-0044485 (published Apr. 15, 2014)

The present invention provides a variable engine mount for a vehicle in which an engine mount is constituted by a cover portion, a rubber portion and a hydro portion, respectively, and these are assembled and assembled by a screw fastening method so that the hydrodamping value and frequency can be freely changed.

Another object of the present invention is to make it possible to change the longitudinal stiffness by assembling both the inside and the outside of the engine mount cover part using a screw thread.

It is still another object of the present invention to provide an engine mount cover capable of changing the diameter of the engine mount cover and capable of varying the up / down / front / rear gap (due to the rotation angle) to obtain excellent effects of noise and vibration (NVH) There is.

The above and other objects of the present invention can be achieved by the present invention described below.

In the variable engine mount for a vehicle of the present invention,

The cover unit 100, the rubber unit 200, the hydro unit 300, and the bracket 400 are assembled by the coupling unit 500. The vibration and vibration of the NVH ), Driving sense (R & H) and riding performance.

The coupling means (500) comprises:

A cover part 100 having a first inner joint part 110 and a second outer joint part 120 concentric with the inner lower part and having different inner diameters and a third joint part 130 at the outer middle part; And

A rubber part 200 having a first male screw 201 at the lower end to be coupled to the first male part 110; And

And a second male screw (301) formed on an outer surface thereof to be coupled to the second male engaging part (120) after the rubber part (200) is engaged. And

A bracket 400 having a female thread 401 formed inside to be coupled to the third coupling part 130;

.

In addition, the first and second coupling portions 110 and 120 formed on the cover portion 100 are formed of female threads, and the third coupling portion 130 is a male thread.

The cover 101 is formed on both sides of the cover so that the gap between the cover part 100 and the rubber part 200 can be adjusted when the cover part 100 is rotated.

The cover portion 100 performs vertical and longitudinal gap tuning. The rubber portion 200 performs front-back and top-to-back rigidity tuning. The hydrophone portion 300 functions as a tamping value and a frequency tuning portion. And is fastened to the vehicle body by a screw.

Further, the rubber part 200 and the hydro part 300 are assembled in a reservoir (not shown) containing a fluid.

In addition, an o-ring (320) for preventing leakage is further provided between the rubber part (200) and the hydro part (400).

The variable engine mount capable of changing the engine mount characteristic value of the present invention can obtain the following effects.

First, the engine mount is constituted by the cover portion, the rubber portion and the hydro portion, and these are assembled and assembled by the screw fastening method, respectively, so that the hydro damping value and frequency can be freely changed.

Second, since the inner and outer parts of the engine mount cover are assembled by using threads, the rigidity can be changed.

Third, it is possible to change the diameter of the engine mount cover part and change the gap between the up / down / front / back (due to the rotation angle), thus it is excellent in noise and vibration (NVH) and running sense (R & H).

1 is a cross-sectional view of a conventional engine mount for a vehicle.
2 is a cross-sectional view of a variable engine mount for a vehicle according to the present invention.
3 is an assembled cross-sectional view of a variable engine mount for a vehicle according to the present invention.
4 (a) and 4 (b) are cross-sectional views illustrating a cover portion and a rubber portion constituting the variable engine mount for a vehicle according to the present invention,
(a) is a view showing a state of the gap with the rubber portion before rotation of the cover portion is performed, and
(b) is a view showing the state of the gap with the rubber portion after the cover portion is rotated.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in order that the present invention can be easily carried out by those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

In addition, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings, and the inventor should properly define the concept of the term to describe its invention in the best way. It should be construed as meaning and concept consistent with the technical idea of the present invention.

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

2, the variable engine mount 1 for a vehicle according to the present invention basically comprises a cover part 100, a rubber part 200, a hydro part 300 and a bracket 400, 500).

The cover part 100 includes first and second coupling parts 110 and 120 having concentric circles on the lower inner side and different inner diameters and a third coupling part 130 on the outer middle part, The parts 110 and 120 are made of female threads, and the third coupling part 130 is made of a male thread.

At this time, the cover 101 is formed on both sides of the inside of the cover part 100 so that the gap between the cover part 100 and the rubber part 200 can be adjusted when the cover part 100 is rotated.

4, when the cover part 200 is rotated 90 degrees as shown in FIG. 4 (b) in a state where the gap (gap a) with the rubber part 200 is large as shown in FIG. 4 (a) The gap a-1 between the rubbing portion 101 and the rubber portion 200 becomes small.

Therefore, the gap can be adjusted by the rotation of the cover portion 100 and the vertical positional variation.

The rubber part 200 is made of a rubber material so that the damping effect of the engine mount apparatus of the present invention can be realized.

The rubber part 200 includes a core 220 having an insulator rubber 210 having a first liquid chamber 211 and a bolt 221 for transmitting an external load to the engine mount on the insulator rubber 210 do.

A first male screw 201 is formed on the outer side of the rubber part 200 to be screwed into the first engaging part 110 formed inside the cover part 100.

3, the rubber part 200 is also driven by a difference in gap a between the cover part 100 and the cover part 100 caused by the rotation of the cover part 100 in a certain direction, (R & H) can be freely changed, and the noise and vibration (NVH) and (b) rigidity caused by this change can be freely changed.

A second male screw 301 is formed to be coupled to the second engaging part 120 formed inside the cover part 100 after the rubber part 200 is coupled to the outside of the hydro part 300. [

A bellow having a second liquid chamber 302 is integrally formed in the hydro-fluid chamber 300 and a vibration is transmitted to the upper surface of the second liquid chamber to reduce the vibration transmitted to the inside of the engine mounting. .

At this time, it is preferable to assemble the rubber part 200 and the hydro part 300 underwater in order to maintain the performance of assembling the hood part 300.

An O-ring 320 is provided between the rubber part 200 and the hydro part 300 to prevent oil leakage.

The bracket 400 is formed with a male screw 401 to be screwed into a third engaging part 130 formed at an intermediate intermediate point of the cover part 200.

The bracket 400 is fastened to the vehicle body by welding, bolts and nuts.

The coupling means 500 comprises a male screw and a female screw formed on the cover part 100, the rubber part 200, and the bracket 300, respectively.

The coupling means 500 is not necessarily limited to screws, and various coupling methods other than screw coupling may be devised.

The cover 100, the rubber part 200, the hydro part 300, and the bracket 400 are separately manufactured. The cover part 100, the rubber part 300, and the bracket 400 are separately manufactured. Respectively.

That is, the male screw part 201 formed on the rubber part 200 is screwed to the first engaging part 110 formed inside the cover part 100, and then the second engaging part formed on the lower end of the cover part 100 120 are screwed together with the male screw 301 formed on the hydro-

At this time, as mentioned above, the assembling of the hydro-part 300 and the rubber part 200 is combined in a storage tank (not shown) in which the hydro-liquid is contained, thereby enhancing the hermeticity.

Next, the variable engine mount 1 for a vehicle assembled as described above is screwed to the bracket 400, that is, the third engaging part 130 formed at the midpoint outside the cover part 100, with the female screw formed inside the bracket 400 Then, bolts and nuts are mounted on the vehicle body.

Therefore, the present invention is capable of evaluating the performance by changing only some of the factors of the mount design factors in order to perform the performance test and the problem that the mass production is slow due to the complicated and various parts as in the prior art, so that the consistency of the samples can be maintained.

In addition, the sample production period can be greatly reduced. Normally, it takes about two weeks to obtain a tuning sample. However, the present invention can be performed individually to shorten the time.

Particularly, in the conventional technique, it is difficult to set the secondary stiffness of the rubber part in order to select an integrated sample such as NVH and ride performance, etc. The present invention solves the problem by adjusting the gap between the cover part 100 and the rubber part 200.

While the present invention has been described with reference to the preferred embodiments described above and the accompanying drawings, it is to be understood that the invention may be embodied in different forms without departing from the spirit or scope of the invention. Accordingly, the scope of the present invention is defined by the appended claims, and is not to be construed as limited to the specific embodiments described herein.

1: Variable engine mount for vehicle
100:
101: Breaking
110, 120,
200: rubber part
201,301: Male thread
210: insulator rubber
211: First liquid room
220: Core
300:
302: second liquid room
310: Membrane
400: Bracket

Claims (7)

The cover part, the rubber part, the hydro part and the bracket constituting the engine mount are assembled by the engaging means. By changing the hydro frequency by rotating each part, the noise and vibration (NVH), the running sense (R & Wherein the engine mount is mounted on a vehicle.
The method according to claim 1,
Said coupling means comprising:
A cover portion having first and second coupling portions having concentric circles at inner lower portions and different inner diameters, and a third coupling portion at an outer intermediate portion; And
A rubber part having a first male screw at the lower end to be coupled to the first engaging part; And
And a second accommodating portion formed on the outside to be coupled to the second engaging portion after the rubber portion is engaged; And
A bracket having a female screw formed on an inner side thereof to be coupled to the third engaging portion;
And an engine mount for a vehicle.
3. The method of claim 2,
Wherein the first and second engagement portions formed on the cover portion are made of female threads and the third engagement portion is male threaded.
The method according to claim 1,
Wherein a cover is formed on both sides of the cover so that a gap between the cover and the rubber can be adjusted when the cover is rotated.
The method according to claim 1,
Wherein the cover portion performs vertical and longitudinal direction gap tuning, and the rubber portion functions as a tamping value and a frequency tuning portion for the front and rear and top and bottom rigidity tuning, and the bracket is fastened to the vehicle body by screws.
The method according to claim 1 or 2,
Wherein the rubber portion and the hydro portion are assembled in a fluid reservoir.
The method according to claim 1 or 2, wherein
Further comprising an O-ring for preventing oil leakage between the rubber part and the hydro part.

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