KR20180064581A - Rotary support brkt-intergrated engine mount - Google Patents

Abstract

The present invention relates to a rotary joint support bracket-integrated engine mount in which a joint capable of rotating motion is applied to an engine mount support bracket, so an increase of a roll mode frequency is minimized while an increase of a yaw/pitch mode frequency is maximized when the mount stiffness is increased, thereby effectively improving idle low frequency vibration, wherein an engine support bracket (10) is integrated with an engine mounting bracket (20) by using a rotary coupling device (100). The rotary coupling device (100) includes: a case (110) coupled to a vehicle body (1); a first bracket (120) coupled to the case (110); a second bracket (130) rotationally fitted and fixed in the first bracket (120); a fixing pin (140) for fixing the first and second brackets (120, 130); and a fixing bolt (150) for coupling the first bracket (120) to the case (110).

Description

{ROTARY SUPPORT BRKT-INTERGRATED ENGINE MOUNT}

The present invention relates to a rotary joint support bracket integrated engine mount. Specifically, the present invention applies a joint capable of rotating motion to the engine mount support bracket to minimize the upward movement of the ROLL mode frequency while maximizing the YAW / PICH mode frequency while maximizing the mount rigidity, thereby improving the idle low- To a joint support bracket integral engine mount.

High-efficiency engine downsizing technology maximizing driving performance by reducing exhaust gas by reducing engine exhaust but increasing output is a hot topic in the automotive industry in recent years. The three-cylinder engine, which reduces the number of cylinders and reduces the number of cylinders in a typical 4-cylinder engine and improves fuel efficiency by applying a turbocharger, is a representative technology for downsizing. The development of a 3-cylinder engine that eliminates the balance shaft module It is progressing.

However, the three-cylinder engine has a disadvantage in that the low-frequency vibration of the idler is inferior to that of the four-cylinder engine due to the C1 imbalance moment generated by the inertia force. As a strategy for resolving vehicle vibration problem, a method of improving the vibration insulation performance by softly designing the characteristics of the engine mount supporting the power train is mainly used. However, this method has a problem that the large shift of the power train becomes large, And the expectation of customers demanding handling performance at the same time.

That is, the following Table 1 shows the idle vibration characteristics of the four-cylinder and three-cylinder engine and the human sensitivity (iso2631-1) according to the frequency.

Table 1

The idle vibration of the four-cylinder engine is concentrated in the zone where the C2 component due to the explosive force is comparatively favorable to the human sensitivity, while the idle vibration of the three-cylinder engine is the C1.5 component due to the explosive force, It can be seen that the component is concentrated in the low frequency band where human sensitivity to 4 cylinder is disadvantageous.

Therefore, even if the engine power of the same size, the three cylinder engine has a disadvantage that the idling vibration peeling is worse than the four cylinder engine.

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 verifying actual vehicle such as comparison of idle vibration and PT large displacement behavior of a light vehicle using a FOCUS and PT rigid- A new alternative for three-cylinder idle low frequency vibration improvement has been proposed.

1. Korean Patent Publication No. 10-2016-0112850 (published on September 28, 2016)

1. Korean Utility Model No. 20-1999-0015319 (published May 15, 1999)

1. Korean Patent Publication No. 10-1997-0046842 (published on July 26, 1997)

The present invention is capable of optimizing PT rigid mode (securing idle RPM and PT rigid mode frequency separation) without significant modification or modification of the bush geometry inside the engine mount, thereby effectively improving the idle low frequency vibration.

Another object of the present invention is to solve the problem of idle low frequency vibration by separately installing a module called a balance shaper in a three-cylinder engine, So that it is possible to reduce the cost / weight by eliminating the need for a device and to improve the fuel efficiency.

It is a further object of the present invention to provide a motorcycle which is capable of using a conventional engine mount as it is without the necessity of changing the bushing structure inside the engine mount, .

The present invention relates to a structure in which an engine is fixed by connecting an engine and a vehicle body by an engine support bracket and an engine mounting bracket,

The engine support bracket 10 and the engine mounting bracket 20 are integrally formed using the rotary coupling means 100. [

The rotation coupling means (100) comprises:

A case 110 coupled to the vehicle body 1; And

A first bracket 120 coupled to the case 110; And

A second bracket 130 rotatably fitted in the first bracket 120; And

A fixing pin 140 for fixing the first and second brackets 120 and 130; And

And a fixing bolt 150 for coupling the first bracket 120 and the case 110 to each other.

A rubber bush 160 is installed in the case 110 and a bearing 170 is inserted into the front surface of the second bracket 130 so that the second bracket 130 is freely rotated from the first bracket 120 .

INDUSTRIAL APPLICABILITY According to the present invention, the following effects can be obtained in the integrated type joint support bracket integrated engine mount.

First, it is possible to optimize PT rigid mode (securing the idle RPM and PT rigid mode frequency separation) without major modification or modification of the bush shape inside the engine mount, thus effectively improving the idle low frequency vibration.

Second, the improvement of the idle low frequency vibration through the prior art has solved the idle low frequency vibration problem by separately installing a module called a balance shaper in the three-cylinder engine. However, the present invention using the PT rigid mode optimum arrangement does not require such a separate device Cost / weight reduction is possible and fuel efficiency is improved.

Third, since the present invention adopts a rotating structure for the support bracket, it is not necessary to change the inner bush structure of the engine mount, so that the conventional engine mount can be used as it is, which can save a great deal of mold maintenance during vehicle development.

1 is a view showing a state in which a revolving joint support bracket integrated engine mount according to the present invention is installed between a vehicle body and an engine.
FIG. 2 is a view showing a state in which a rotary joint support bracket integrated engine mount according to the present invention is engaged.
FIG. 3 is an exploded perspective view showing a state where the rotary mount support bracket integrated engine mount according to the present invention is separated. FIG.
4 is a cross-sectional view of a rotary joint support bracket integrated engine mount according to the present invention.
FIG. 5 is a view showing the operation principle of the rotary mount support bracket integrated engine mount according to the present invention.
6 is a view for explaining the PT rigid body mode.

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.

The present invention is a structure in which an engine is fixed by connecting an engine support bracket 10 and an engine mounting bracket 20 between an engine 2 and a vehicle body 1 as shown in Fig.

Referring to FIGS. 2 to 4,

The engine support bracket 10 and the engine mounting bracket 20 are integrally formed by using the rotational coupling means 100 so that the YAW / PICH mode frequency can be maximized while maximizing the ROLL mode frequency upward when the mount rigidity is increased So that the low-frequency vibration of the child can be effectively improved.

3 or 4, the rotational coupling means 100 includes a case 110 coupled to the vehicle body 1, a first bracket 120 coupled to the case 110, And a second bracket 130 rotatably fitted in the first bracket 120. The first and second brackets 120 and 130 are fixed by a fixing pin 140. [

At this time, a rubber bush 160 is installed in the case 110, and a bearing 170 is inserted into the front surface of the second bracket so that the second bracket 130 smoothly rotates from the first bracket 110 .

The first bracket 110 is engaged with the rubber bush 160 inserted into the case 110 and fixed by the fixing bolts 150.

The first bracket 120 and the second bracket 130 are rotatably fixed by a fixing pin 140.

The case 110 is formed with an insertion portion 111 having a hollow shape hollow inside and a rubber bush 160 formed of rubber is inserted into the insertion portion 111.

At this time, the rubber bushing 160 also has a front opening, an inner side hollow, a hole for inserting the fixing bolt 150 at one side of the upper surface, and an upper surface of the case 110 is fixed A bolt hole 112 through which the bolt 160 passes is formed.

The first bracket 120 has a bolt seat having a thread 122a for fastening with a fixing bolt 150 inserted through a bolt hole 112 formed in the case 110 and the rubber bush 160, (Not shown).

In addition, a rectangular fixing hole 123 for inserting the fixing pin 140 is formed on the rear side corresponding to the bolt mounting part 122.

An engaging hole 121 for inserting the second bracket 130 is formed immediately below the rectangular fixing hole 123. The engagement hole 121 is formed in a circular shape.

In the meantime, the second bracket 130 is formed in a substantially 'ㅓ' shape. The body 131 coupled with the engine mounting bracket 20 has at least two bolt holes 131a formed in a rectangular shape. And is fastened to the engine mounting bracket 20.

A rotation shaft 132 having a circular protrusion at the tip is protruded and formed at the front center of the body 131 and is inserted into the coupling hole 121 formed in the first bracket 120 and is rotatably fixed.

A ring-shaped bearing 170 is coupled to the shaft 132 to smoothly rotate the second bracket 130 when the first bracket 130 is rotated from the first bracket 120.

After the rotation shaft 132 formed on the second bracket 130 is inserted into the engagement hole 121 of the first bracket 120 and the fixing pin 140 for engaging the rotation shaft 132 is engaged with the first bracket 120 The first and second brackets 130 and 132 are fixed to the first bracket 130 and the second bracket 130 so that the first and second brackets 130 and 132 are fixed to the first bracket 130 and the second bracket 130, Quot; C "in which the lower portion is opened so that the forward and backward movement is restrained by the protrusion formed at the tip of the rotation shaft 132. [

Therefore, as shown in FIG. 3 or 4, the rotary joint support bracket integrated type engine mount,

A rubber bush 160 formed of rubber is inserted into the insertion portion 111 formed on the front surface of the case 110. [

The first bracket 120 having the same shape is inserted into the rubber bush 160.

When the first bracket 120 is inserted into the rubber bushing 160, the rotation shaft 132 formed on the second bracket 130 is inserted into the engagement hole 121 formed in the first bracket 120.

At this time, the rotation shaft 132 is provided with a bearing 170 in advance.

When the second bracket 130 is coupled to the first bracket 120 as described above, the fixing pin 140 is inserted between the fixing holes 123 formed in the first bracket 120, So that the second bracket 130 is prevented from being detached from the first bracket 120.

After the first bracket 120 and the second bracket 120 are coupled to each other as described above, the first bracket 120 is inserted into the rubber bush 160 installed in the case 110, The fixing bolt 150 is coupled through the bolt hole 112 formed at the upper end of the bolt hole 112 to be coupled as shown in FIG.

1, the combined revolving joint support bracket integrated type engine mount is connected between the engine support bracket 10 and the engine mounting bracket 20 between the engine 2 and the vehicle body 1, The engine was fixed.

Accordingly, the present invention solves the problem of idle low frequency vibration by separately mounting a module called a balance shaper in a three-cylinder engine in order to solve the low-frequency vibration of an idle state through the conventional art. However, , There is no need for a separate device as described above, so that the cost / weight reduction is possible and the fuel consumption is improved.

In addition, since the present invention adopts a rotating structure for the support bracket, it is not necessary to change the bush structure inside the engine mount, and the conventional engine mount can be used as it is, which can save a great deal of mold maintenance during vehicle development.

In the PT rigid mode, as shown in FIG. 6, six rigid body modes are derived, assuming that the power train and the mount are a rigid body and a spring, respectively. Among them, the rigid body mode which can affect the vibration of the idle C1 is the ROLL / YAW / PITCH mode in the 10 to 20 Hz band. ROLL is a mode in which the Y-axis rotates in the XZ plane with respect to the Y axis, YAW rotates in the XY plane with respect to the Z axis, and the PITCH rotates in the YZ plane with respect to the X axis.

5, when the second bracket 130 rotates, the YAW / PITCH mode is upwardly moved and the ROLL mode is downward.

The reason for this is that the idle RPM 850 in the 3-cylinder engine is closer to the YAW mode in the initial mount, so the C1 vibration is more than 93dB. However, by increasing the stiffness of the engine mount, the YAW mode is separated from the idle RPM by more than 2Hz, 80dB level by more than 10dB.

However, caution should be exercised to ensure that the positive upshift of the engine mount simply increases the ROLL mode in order to maintain the separation between idle RPM and YAW mode frequency.

Therefore, in the present invention, as shown in the following table,

The inner bushing structure of the engine mount was tuned to maximize the YAW mode frequency while maximizing the ROLL mode upward through rigidity reinforcement in the Y direction. Unfortunately, the ROLL mode frequency was raised by about 1.3 Hz from the initial value.

At this time, the Y-axis dB represents 10 dB per one eye.

Further, in order to enable the ROLL mode to be basically downward even when the YAW / PITCH mode is upgraded, an engine mount structure in which a rotary joint is applied to the support bracket is provided in the present invention.

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.

10: Engine support bracket
20: Engine mounting bracket
100:
110: Case
120: First bracket
130: second bracket
140: Fixing pin
150: Fixing bolt
160: Rubber Bush
170: Bearings

Claims (4)

In a structure in which an engine is fixed by connecting an engine and a vehicle body by an engine support bracket and an engine mounting bracket,
Wherein the engine support bracket and the engine mounting bracket are integrally formed by using a rotation coupling means. The method according to claim 1,
The rotational coupling means comprising:
A case coupled to the vehicle body; And
A first bracket coupled to the case; And
A second bracket rotatably fitted in the first bracket; And
A fixing pin for fixing the first and second brackets; And
And a fixing bolt for coupling the first bracket and the case to each other. 3. The method of claim 2,
And a rubber bush is provided in the case. 3. The method of claim 2,
Wherein a bearing is inserted into the front surface of the second bracket so that the second bracket rotates freely from the first bracket.

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