KR20230102246A - strut mount of suspension for vehicle - Google Patents

Abstract

The present invention relates to a strut mount of a suspension for a vehicle, which comprises a first insulator for attenuating vibration in the left-right direction and a second insulator for attenuating vibration in the front-rear direction, and which can attenuate vibration in the up-down direction by the combination of the first insulator and the second insulator. The first insulator is made of low dynamic ratio rubber, the second insulator is made of high damping rubber, and a gap for spacing the first insulator and the second insulator apart from each other is formed between the first insulator and the second insulator.

Description

Strut mount of vehicle suspension {strut mount of suspension for vehicle}

The present invention relates to a strut mount of a suspension device for a vehicle, and more particularly, to a strut mount of a suspension device for a vehicle having a first insulator for damping vibration in a left-right direction and a second insulator for damping vibration in a forward-rear direction.

In order to improve riding comfort and steering performance, vehicles are equipped with suspensions. There are various types of suspension, and among them, a strut suspension is installed on the front wheel side of most FF (Front engine Front drive) vehicles due to its simple structure and excellent performance.

The strut-type suspension includes a strut composed of a shock absorber and a coil spring. ) is mounted to be coupled to.

In addition, a strut mount is provided at an upper end of the strut to couple the strut to the vehicle body.

1 is a cross-sectional view of a conventional strut mount.

As shown in FIG. 1, the strut mount includes a rod support member 10 for supporting the piston rod of the shock absorber by being coupled so that the lower surfaces of the upper cup 11 and the lower cup 12 of the inverted form come into contact with each other, and the rod A main plate 20 made of metal provided around the support member 10 and serving as a skeleton to fix the rod support member 10 to the vehicle body, and a spring rotatably at the bottom of the main plate 20 The bearing plate 30 made of metal, which forms the bearing seating portion 31 for mounting the strut bearing to be supported, is bonded to the main plate 20 and the bearing plate 30 to combine them into one, and the rod support member 10 ) It includes an insulator 40 made of rubber to absorb vibrations.

The main plate 20 has curved inner and outer ends so as to maintain rigidity without being deformed even under continuous vibration and impact, and a coupling bolt 21 for fixing the strut mount to the vehicle body is provided at the outer end.

The bearing plate 30 is curved to surround the upper part of the strut bearing and the outer side in the radial direction so that the strut bearing does not escape from the bearing seating part 31, and the lower part of the main plate 20 through the insulator 40 are arranged in layers.

In such a conventional strut mount, only one rubber material is applied to the insulator 40 to damp vibration in all directions, so the material of the insulator 40 can only be selected by compromising riding comfort, steering, durability, etc. there is.

Republic of Korea Patent Registration No. 10-1873284 "High Rigidity and Lightweight Strut Mount" (registered on June 26, 2018)

The present invention has been made to solve the problems of the prior art as described above, and includes a first insulator for damping vibration in the left and right directions and a second insulator for damping vibration in the front and rear directions. An object of the present invention is to provide a strut mount of a vehicle suspension that can be damped by a combination of an insulator and a second insulator.

In order to solve the above problems, the present invention, a rod support member in which the upper portion of the upper cup and the lower portion of the upper cup inverted shape are coupled to support the piston rod of the shock absorber; A ring-shaped horizontal extension portion extending in a horizontal direction from an outer radial direction of the rod support member in a cross section, a first inward bent portion inclined upwardly from an inner side of the horizontal extension portion in a radial direction toward an inner side in a radial direction, and a second inward bent portion bent downwardly from the radially inner side of the first inward bent portion toward the radially inward side; a third inward bent portion bent radially outward from the lower end of the second inward bent portion toward the radially inward side; and the horizontal extension. a main plate made of metal including an outer bent portion bent downward in a radial direction outside the portion, and having a plurality of body coupling portions to be fixed to the vehicle body formed at an edge of the horizontal extension portion; a bearing plate made of metal provided under the main plate to form a strut bearing seating portion for seating the strut bearing; an insulator made of rubber that is bonded to the main plate and the bearing plate, combines them into one, and absorbs vibration of the rod support member; In a strut mount of a suspension device for a vehicle comprising: the insulator is divided into a first insulator made of low dynamic ratio rubber and a second insulator made of high damping rubber; The first insulator is provided between the main plate and the bearing plate, an upper surface of the horizontally extended portion of the main plate, and an upper surface of a first inward bent portion of the main plate disposed in a first radial direction around the rod supporting member. And vulcanization is bonded to the radial direction inner surface of the second inner bent portion and the lower surface of the third bent portion; The second insulator has an upper surface of the first inner bent portion of the main plate and an inner surface in a radial direction of the second inner bent portion of the main plate disposed in a second radial direction perpendicular to the first radial direction around the rod supporting member. 3 is vulcanized and bonded to the lower surface of the bent part; A separation gap may be formed between the first insulator and the second insulator to separate the first insulator and the second insulator.

In the above: the first insulator is integrally formed to form a single body, while the second insulator is divided into two parts around the rod support member and arranged in a ribbon shape in plan view; The separation gap includes a first separation gap extending in an arc shape in a plane along an inner upper surface of the horizontally extending portion of the main plate, and an upper surface of the first inner bending portion of the main plate and a radial direction of the second inner bending portion. A pair of second spacing gaps extending in a radial direction along the inner surface and the lower surface of the third bent portion, and a third spacing gap extending in a planar arc shape along the radially outer lower surface of the third bent portion of the main plate connected to each other to form a closed curve; The width of the second separation gap is 2 to 10 mm; this is preferable

In the above, it is preferable that the first insulator vulcanized to the second inward bent portion of the main plate occupies a wider area than the second insulator vulcanized to the second inward bent portion of the main plate in plan view.

As described above, the present invention includes a first insulator for damping vibration in the left and right directions and a second insulator for damping vibration in the longitudinal direction, and vibration in the vertical direction is attenuated by a combination of the first insulator and the second insulator. Provides a strut mount for a vehicle suspension system that can be used.

1 is a cross-sectional view of a strut mount of a vehicle suspension according to the prior art;
2 is a perspective view of a strut mount of a suspension device for a vehicle according to an embodiment of the present invention;
Figure 3 is a plan view of Figure 2;
4 is a cross-sectional view based on AA of FIG. 3;
5 is a cross-sectional view based on BB of FIG. 3;
6 is an exploded perspective view of an upper cup and a lower cup of the rod support member of FIG. 2;
Figure 7 is a perspective view of a state excluding the rod support member in Figure 2;
Figure 8 is a plan view of Figure 7;
Figure 9 is a bottom view of Figure 7;
10 is a perspective view of a main plate and a bearing plate applied to FIG. 2;

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. In addition, in order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated.

2 is a perspective view of a strut mount of a suspension device for a vehicle according to an embodiment of the present invention, FIG. 3 is a plan view of FIG. 2, FIG. 4 is a cross-sectional view based on A-A of FIG. 3, and FIG. 5 is a cross-sectional view based on B-B of FIG. 6 is an exploded perspective view of an upper cup and a lower cup of the rod support member of FIG. 2, FIG. 7 is a perspective view of a state except for the rod support member in FIG. 2, FIG. 8 is a plan view of FIG. 7, and FIG. 7 is a bottom view, and FIG. 10 is a perspective view of a main plate and a bearing plate applied to FIG. 2 .

The strut mount of the vehicle suspension includes a rod support member 100, a main plate 200, a bearing plate 300, a first insulator 410, a second insulator 420, and the like.

A rod support member 100 is provided at the center of the strut mount of the vehicle suspension. The rod support member 100 is for supporting the piston rod of the shock absorber, and the lower part of the upper cup 110 made of metal and the upper part of the upper cup 120 of the inverted shape made of metal are combined.

In this embodiment, the upper cup 110 and the lower cup 120 are joined by projection welding. Since various methods of coupling the upper cup 110 and the lower cup 120 are widely known in the prior art, a detailed description thereof will be omitted.

The lower cup 120 forms a rod seating portion to which the piston rod of the shock absorber is fixed, and the end of the piston rod is attached to the rod support member by using a nut member or the like at the joint between the upper cup 110 and the lower cup 120. Through-holes 130 are formed in the vertical direction so as to be fixed to (100).

An annular main plate 200 is provided on the outer side of the rod support member 100 in a radial direction and spaced apart from the rod support member 100, and is made of a metal material and travels around the outer circumference of the rod support member 100. .

The main plate 200 serves as a framework for maintaining the shape of the strut mount.

The main plate 200 includes a horizontal extension part 210, a first inside bent part 221, a second inside bent part 222, a third inside bent part 223, and an outside bent part 230. include

The horizontal extension portion 210 has a ring shape extending in a horizontal direction from a radially outer side of the rod support member 100 in cross section.

A first inner bent part 221 , a second inner bent part 222 , and a third inner bent part 223 are sequentially formed on the radially inner side of the horizontal extension part 210 .

A first inward bent portion 221 bent upwardly inclined from the inside of the horizontal extension 210 in the radial direction toward the inside in the radial direction is formed, and from the inside of the first inside bent portion 221 in the radial direction toward the inside in the radial direction. A second inner bent part 222 bent downwardly is formed, and a third inner bent part 223 bent outward in a radial direction from a lower end of the second inner bent part 222 is formed.

In addition, an outer bent portion 230 bent downwardly outside the horizontal extension portion 210 in a radial direction is formed.

In addition, at the edge of the horizontal extension part 210, a plurality of body coupling parts 211 to be fixed to the vehicle body are formed.

In this embodiment, the vehicle body coupling part 211 is arranged in a triangular shape and is provided at three parts of the horizontal extension part 210 .

In this embodiment, the vehicle body coupling part 211 includes a bolt insertion hole 211a and a coupling bolt 211b inserted into the bolt insertion hole 211a.

The bearing plate 300 surrounds the upper part of the strut bearing and the outer side in the radial direction to form a strut bearing seating portion 301 for the strut bearing to be seated, that is, to prevent the strut bearing from being separated from the strut bearing seating portion 301. curved in shape.

The bearing plate 300 is disposed under the main plate 200 while being spaced apart from the main plate 200 .

The first insulator 410 and the second insulator 420 made of rubber are bonded to the main plate 200 and the bearing plate 300 to combine them into one and to absorb the vibration of the rod support member 100, respectively. provided

The first insulator 410 is made of low dynamic ratio rubber, and the second insulator 420 is made of high damping rubber.

In the above and below, the low dynamic ratio rubber refers to rubber with a dynamic ratio (kd/ks) of 1.5 or less in rubbers of less than Hs50, rubber with a dynamic ratio (kd/ks) of 2.0 or less in rubbers of Hs50 to 60, and rubber with a dynamic ratio (kd/ks) of 2.0 or less in Hs60 to 70 rubbers. Rubber with a dynamic ratio (kd/ks) of 2.5 or less refers to rubber with a dynamic ratio (kd/ks) of 3.5 or less in rubbers exceeding Hs70.

In addition, in the above and below, high damping rubber refers to rubber with a loss factor (tan δ) of 0.1 or more in rubbers of less than Hs50, rubber with a loss factor (tan δ) of 0.15 or more in rubbers of Hs50 to 60, and loss in rubbers of Hs60 to 70 Rubber with a modulus (tan δ) of 0.2 or more refers to rubber with a loss factor (tan δ) of 0.25 or more in rubbers exceeding Hs70.

The first insulator 410 is formed in a first radial direction between the main plate 200 and the bearing plate 300, the upper surface of the horizontal extension part 210 of the main plate 200, and the rod support member 100 as the center. The upper surface of the first inner bent part 221 of the main plate 200 disposed on the inner surface in the radial direction of the second inner bent part 222 and the lower surface of the third bent part 223 are vulcanized.

The second insulator 420 is formed by a relationship between the upper surface of the first inner bent part 221 of the main plate 200 and the second inner bent part 222 disposed in the second radial direction around the rod supporting member 200. The inner surface in the radial direction and the lower surface of the third bent portion 223 are vulcanized.

Here, the first radial direction and the second radial direction are orthogonal to each other.

Specifically, the first radial direction is the left-right direction of the vehicle, and the second radial direction is the front-rear direction of the vehicle.

In addition, a separation gap 430 for separating the first insulator 410 and the second insulator 420 is formed between the first insulator 410 and the second insulator 420 .

The separation gap 430 is provided to prevent frictional noise from occurring as the first insulator 410 and the second insulator 420 rub against each other, that is, the first insulator 410 and the second insulator 420 are They are formed to be spaced apart from each other.

After the first insulator 410 and the second insulator 420 are vulcanized and adhered to the main plate 200 and the bearing plate 300, the upper cup 110 and the lower cup forming the rod support member 100 ( 120) is press-fitted between the first insulator 410 and the second insulator 420, and the upper cup 110 and the lower cup 120 are coupled to complete a vehicle strut mount.

In this embodiment, the first insulator 410 is integrally formed along the main plate 200 to form one body.

Contrary to the first insulator 410, the second insulator 420 is divided into two around the rod supporting member 100 and arranged in a ribbon shape in plan view.

In addition, in the separation gap 430 of this embodiment, one first separation gap 431, a pair of second separation gaps 432, and one third separation gap 433 are connected to each other to form a closed curve. achieve

The first separation gap 431 extends in an arc shape on a plane along the inner upper surface of the horizontal extension part 210 of the main plate 200 in a radial direction.

The second separation gap 432 is formed by forming an upper surface of the first inner bent part 221 of the main plate 200, an inner surface of the second inner bent part 222 in a radial direction, and a lower surface of the third bent part 223 of the main plate 200. It is a shape that extends in a radial direction.

The third separation gap 433 extends in an arc shape on the bottom surface along the outer lower surface in the radial direction of the third bent portion 223 of the main plate 200 .

That is, one side of the pair of second separation gaps 432 is connected to both sides of the first separation gap 431, and the pair of second separation gaps 432 are connected to both sides of the third separation gap 433. The other sides are connected to each other to form a closed curve.

The shape of the separation gap 430 is the first insulator 410 and the second insulator 420 while using the horizontal extension part 210 and the third bent part 223 having a shape close to the horizontal plane or a substantially horizontal plane. ) is spaced apart as a whole to prevent mixing of the first insulator 410 and the second insulator 420, thereby improving the quality of the strut mount.

Meanwhile, the width W of the second separation gap 432 is preferably 2 to 10 mm.

If the width of the second separation gap 432 is less than 2 mm, when the first insulator 410 and the second insulator 420 are compressed, the first insulator 410 and the second insulator 420 rub against each other, resulting in a friction joint. There is a problem that occurs.

In addition, if the width of the second separation gap 432 exceeds 10 mm, the area not attenuated by the first insulator 410 and the second insulator 420 is excessively expanded, making it difficult to have appropriate attenuation characteristics in all directions. .

In this structure, the first direction refers to the left and right directions of the vehicle.

Therefore, the first insulator 410 for damping vibration in the first direction (left and right direction) is a low dynamic ratio rubber, and when high hardness rubber is used, the feeling of support increases and handling performance can be improved due to the increase in lateral characteristics. .

The second direction refers to the forward and backward directions of the vehicle.

Therefore, the second insulator 420 for damping vibration in the second direction (front-rear direction) is a high-damping rubber, and when a relatively low hardness rubber is used, the static characteristics are reduced, and the damping force is increased to improve contact feeling and riding comfort such as aftershock feeling. this can be improved.

In addition, the vertical characteristics of the vehicle are determined by the combination of the first insulator 410 and the second insulator 420. The first insulator 410 occupies a wider area in a plan view than the second insulator 420 vulcanized to the second insulator 422 of the main plate 200, so that the first insulator (410) 410) to be the dominant feature.

Therefore, the vertical characteristics of the vehicle increase static characteristics due to the dominant characteristics of the first insulator 410 using high hardness rubber, thereby securing damping response of the shock absorber and low dynamic ratio characteristics NVH can be improved.

As described above, the present invention changes the rubber properties of the first insulator 410 and the second insulator 420 and the shape characteristics of the first insulator 410 and the second insulator 420, thereby changing the front and rear/left and right sides required by the vehicle. The strut mount can be tuned for performance.

The above description of the present invention is for illustrative purposes, and those skilled in the art can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be construed as being included in the scope of the present invention. do.

100: rod support member
110: upper cup 120: lower cup
200: main plate
210: horizontal extension
221: first inner bent portion 222: second inner bent portion
223: third inner bent portion
230: outer bend
300: bearing plate
410: first insulator
420: second insulator
430: separation gap
431: first separation gap 432: second separation gap
433: third separation gap

Claims (3)

A rod support member in which a lower part of the upper cup and an upper part of the inverted lower cup are coupled to support the piston rod of the shock absorber;
A ring-shaped horizontal extension portion extending in a horizontal direction from an outer radial direction of the rod support member in a cross section, a first inward bent portion inclined upwardly from an inner side of the horizontal extension portion in a radial direction toward an inner side in a radial direction, and a second inward bent portion bent downwardly from the radially inner side of the first inward bent portion toward the radially inward side; a third inward bent portion bent radially outward from the lower end of the second inward bent portion toward the radially inward side; and the horizontal extension. a main plate made of metal including an outer bent portion bent downward in a radial direction outside the portion, and having a plurality of body coupling portions to be fixed to the vehicle body formed at an edge of the horizontal extension portion;
a bearing plate made of metal provided under the main plate to form a strut bearing seating portion for seating the strut bearing;
an insulator made of rubber that is bonded to the main plate and the bearing plate, combines them into one, and absorbs vibration of the rod support member;
In the strut mount of a vehicle suspension comprising:
The insulator is divided into a first insulator made of low dynamic ratio rubber and a second insulator made of high damping rubber;
The first insulator is provided between the main plate and the bearing plate, an upper surface of the horizontally extended portion of the main plate, and an upper surface of a first inward bent portion of the main plate disposed in a first radial direction around the rod supporting member. And vulcanization is bonded to the radial direction inner surface of the second inner bent portion and the lower surface of the third bent portion;
The second insulator has an upper surface of the first inner bent portion of the main plate and an inner surface in a radial direction of the second inner bent portion of the main plate disposed in a second radial direction perpendicular to the first radial direction around the rod supporting member. 3 is vulcanized and bonded to the lower surface of the bent part;
a separation gap for separating the first insulator and the second insulator is formed between the first insulator and the second insulator;
Strut mount of vehicle suspension, characterized by.
According to claim 1:
While the first insulator is integrally formed to form a single body, the second insulator is divided into two around the rod support member and arranged in a ribbon shape in plan view;
The separation gap includes a first separation gap extending in an arc shape in a plane along an inner upper surface of the horizontally extending portion of the main plate, and an upper surface of the first inner bending portion of the main plate and a radial direction of the second inner bending portion. A pair of second spacing gaps extending in a radial direction along the inner surface and the lower surface of the third bent portion, and a third spacing gap extending in a planar arc shape along the radially outer lower surface of the third bent portion of the main plate connected to each other to form a closed curve;
The width of the second separation gap is 2 to 10 mm;
Strut mount of vehicle suspension, characterized by.
According to claim 2,
A strut for a vehicle suspension, characterized in that the first insulator vulcanized to the second inner bent portion of the main plate occupies a larger area than the second insulator vulcanized to the second inner bent portion of the main plate in plan view. mount.

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