KR20140127952A - Insulator of suspension - Google Patents

Abstract

The present invention discloses an insulator of a suspension, which stably performs a supporting function and improves a vibration and isolation function by improving the performance of the rubber of an insulator. The insulator of the present invention comprises a supporting member (140), which is installed in a main plate (110) fixed to a vehicle body (1) and has a piston rod (21) of a strut (20) fixed thereto; a bearing plate (120) for supporting a bearing (121); a first supporting unit (151), which is inserted between the main plate (110) and the supporting member (140); an insulator rubber (150), which has a second supporting unit (152) extended from the first supporting member (151) in order to be located between the main plate (110) and the bearing plate (120); and a reinforcement plate (160), which reinforces the strength of the second supporting unit (152) by being installed in the second supporting unit. The modulus coefficient (K2) of the second supporting member is structured to be larger than the modulus coefficient (K1) of the first supporting member (151).

Description

INSULATOR OF SUSPENSION < RTI ID = 0.0 >

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an insulator of a suspension device, and more particularly, to an insulator of a suspension device that can prevent vibration of a bearing from being transmitted to a vehicle body.

In general, the suspension device prevents damage to the vehicle body or the cargo by preventing the vibration or shock received from the road surface from being transmitted directly to the vehicle body when the vehicle travels by connecting the axle and the vehicle body. , Which are classified into an axle suspension system and an independent suspension system.

Of these, the front suspension system of the independent suspension system divides the axle so that both wheels move independently of each other, so that even if an obstacle is caught or bumped on either side of the wheel, only the wheel moves up and down so that the vehicle body is not tilted. Types are as follows: a right-hand type, a leaf spring type in which a leaf spring is disposed horizontally to function as an upper arm or a lower suspension arm as a spring, and a trailing arm type in which a wheel is supported by one or two rearward- , And McPherson type using a strut with a coil spring.

Here, the McPherson suspension system is composed of a strut with a shock absorber built in, such as a steering knuckle, a coil spring, and the like. Since the mounting point of the shock absorber mounted on the vehicle body is high, the alignment is precisely set, The impact of the impact can be widely dispersed.

1, the upper end portion of the piston rod 21 of the strut 20 is fastened to the insulator 31 so as to be insulated from the vehicle body 1. As shown in Fig. The bolts 34 inserted into the mounting holes of the insulator body housing 32 are fastened to the vehicle body so that the entire insulator 31 is fixed to the vehicle body 1 and a strut The nut 22 is fastened to the upper end portion of the piston rod 21 of the piston rod 21.

A nut member 22 is fastened to the bolt forming portion 21a so that the strut 20 is fixed by the bolt-nut fastening. The compression force of the spring 24 is maintained.

An insulator rubber 33 for insulation is incorporated in the inner space formed by the upper housing 32a and the lower housing 32b of the main housing 32. The insulator rubber 33 has an upper end portion of the piston rod 21 And an upper spring seat 36 is rotatably mounted on the lower side of the lower end of the lower housing 32b with a bearing 35 interposed therebetween.

The upper end of the spring 24 is coupled to and supported by a spring pad 37 built in the inner side surface of the upper spring seat 36. The load transmission path of the spring 24 is connected to the spring 24, The seat 36, the bearing 35, the insulator 31, and the vehicle body 1 in this order.

The insulator of the conventional structure has the posture stability of the bearing 35 because the lower housing 32b which is in contact with the pad 37 supporting the spring 24 is directly transmitted to the vehicle body 1 through the upper housing 32a There is a limit to reducing the transmission of the vibration transmitted from the bearing 35 to the vehicle body. In other words, there is a limit in reducing the vibration of the bearing 35 only by the insulator rubber 33 structurally.

Published Patent No. 10-2009-0006697

SUMMARY OF THE INVENTION It is an object of the present invention to provide an insulator of a suspension device capable of reducing vibrations transmitted to a vehicle body.

It is also an object of the present invention to provide an insulator for a suspension device capable of reducing the vibration transmitted from the piston rod and the vibration transmitted from the bearing and maintaining the posture stability of the bearing.

To achieve the above object, an insulator of a suspension device is mounted on a main plate fixed to a vehicle body, and a support member to which a piston rod of a strut is fixed is installed. A bearing plate for supporting the bearing; A first support portion sandwiched between the main plate and the support member, and a second support portion extending from the first support portion so as to be positioned between the main plate and the bearing plate; And a reinforcement plate provided inside the second support and reinforcing the strength, wherein the elastic modulus of the second support member is greater than the elastic modulus of the first support member.

More preferably, the insulator rubber accommodates the main plate therein and is provided with a contact portion which is in direct contact with the vehicle body along the periphery of the bolt for fixing the main plate to the vehicle body.

Still more preferably, the main plate has a vertical portion in contact with the first support portion of the insulator rubber; A horizontal portion in contact with an upper surface of the second support portion of the insulator rubber and extending in a radial direction at one end of the vertical portion; And an extension extending in a direction perpendicular to an end of the horizontal portion so as to be in contact with a side surface of the second support portion at an end of the horizontal portion.

More preferably, the reinforcing plate is mounted so as to be parallel to the horizontal portion.

More preferably, the first support portion and the second support portion are integrally formed.

As described above, the insulator of the suspension according to the present invention can reduce the transmission of vibration of the bearing to the vehicle, and can stably support the bearing, thereby improving the performance.

Further, the insulator of the suspension according to the present invention improves the bearing capacity and vibration damping ability by changing the modulus of elasticity of the first support part and the second support part of the insulator rubber. In addition, reinforcing plates are provided inside the second support portion to reinforce the strength of the insulator rubber, thereby increasing the service life of the product.

1 is a cross-sectional view showing an insulator of a conventional structure,
FIG. 2 is a perspective view illustrating an insulator assembly, which is a preferred embodiment of the present invention. FIG.
Figure 3 is a cross-sectional view of the insulator assembly shown in Figure 2,
Figure 4 is a cross-sectional view of a portion of the insulator assembly.

Hereinafter, the insulator of a suspension device according to a preferred embodiment of the present invention will be described in more detail with reference to the accompanying drawings. The same reference numerals are given to the same parts as in the conventional structure, do.

FIG. 2 is a perspective view illustrating an insulator assembly according to a preferred embodiment of the present invention, FIG. 3 is a cross-sectional view illustrating the insulator assembly shown in FIG. 2, and FIG. 4 is a cross-sectional view illustrating a portion of the insulator assembly.

2 to 4, the insulator of the suspension device according to the present invention is provided with a strut 20 at the upper end of a knuckle arm so that the piston rod 21 of the strut 20 is supported by the main plate 110 of the vehicle body Is connected to the vehicle body. The insulator includes a main plate 110 fixed to the vehicle body 1,

A support plate 140 for supporting the piston rod 21 of the strut 20, a bearing plate 120 for supporting the bearing 121, an insulator rubber (not shown) mounted to surround the outer circumferential surface and the inner circumferential surface of the main plate 110, (150).

The insulator rubber 150 includes a first support portion 151 that is fitted between the main plate 110 and the support member 140 and a second support portion 151 that is disposed between the main plate 110 and the bearing plate 120, 151 extending from the second support portion 152. Further, the insulator rubber 15 surrounds the main plate 110 to receive the inside thereof. There is provided a contact portion 153 which contacts the vehicle body 1 along the periphery of the bolt 34 for fixing the main plate 110 to the vehicle body 1. [ The contact portion 153 is not coated with the insulator rubber 150, and stabilizes the mounting portion to be assembled to the vehicle body, thereby preventing the overflow of rubber during vulcanization molding. When the insulator rubber 150 is applied to the contact portion 153, the torque may be lowered or the joint may be generated at the time of fastening, resulting in deterioration of assemblability. At this time, an embossed structure may be applied to the abutting portion 153 so that the abutting portion 153 can be more firmly fixed.

The elastic modulus K2 of the second support part 152 constituting the insulator rubber 15 is formed to be larger than the elastic modulus K1 of the second support member 151. [ As described above, by increasing the elastic modulus of the second support portion 152, the first support portion 151 has a small elastic modulus, so that the shock absorbing force is excellent and the vibration insulation performance is improved, and the second support portion 152 has a large elastic modulus, The left and right stiffness of the vehicle is improved and the running stability is improved. The first support 151 and the second support 152 may be integrally formed, but they may be formed by joining separate materials.

The main plate 110 is in contact with the vertical portion 111 where the first support portion 151 of the insulator rubber 150 contacts and the upper surface of the second support portion 152 of the insulator rubber 150, A horizontal portion 112 extending in a radial direction at one end and an extension portion 113 extending in a direction perpendicular to the end of the horizontal portion 112.

The reinforcing plate 160 is installed inside the second support part 152 to reinforce the rigidity of the rubber. In this case, the reinforcing plate 160 is preferably parallel to the horizontal part 112.

The supporting member 140 is configured to be inserted into the vertical portion 111 of the main plate 110 while the upper cup 141 and the lower cup 142 are coupled to each other. The upper cup 141 and the lower cup 142 are fastened with the piston rod 21 and the nut.

The bearing 121, on which the pad supporting the spring 24 is supported, is seated on the bearing plate 120.

The insulator rubber 150 is seated between the support member 140 and the main plate 110 and between the bearing plate 120 and the horizontal portion 112 of the main plate 110.

The insulator of the suspension device, which is a preferred embodiment of the present invention constructed as described above, additionally has a vibration isolation function that is transmitted from the bearing by increasing the amount of rubber on the upper end of the bearing plate 120 in addition to the function performed by the conventional insulator.

Also, the posture stability of the bearing 121 is improved by supporting the outer side of the bearing and forming the extended portion 113 of the main plate 110 in the front, rear, left and right directions of the vehicle.

Also, by inserting the reinforcing plate 160 inside the insulator rubber 150, the rubber durability is increased.

The upper cup 141 and the lower cup 142 are constituted by a projection welding or burring and curling structure.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

110: Main plate
111: vertical part
112:
113: extension part
120: bearing plate
140: support member
141: upper cup
142: Lower cup
150: Insulator rubber
151: first support
152: second support
160: reinforcing plate

Claims (5)

A support member 140 mounted on the main plate 110 fixed to the vehicle body 1 and to which the piston rod 21 of the strut 20 is fixed;
A bearing plate (120) for supporting the bearing (121);
A first support 151 that is fitted between the main plate 110 and the support member 140 and a second support 151 that is positioned between the main plate 110 and the bearing plate 120, An insulator rubber 150 consisting of a second support portion 152 extending from the insulator rubber 150;
And a reinforcing plate (160) installed inside the second support part (152) to reinforce the strength,
Wherein the elastic modulus K2 of the second support member 152 is greater than the elastic modulus K1 of the first support member 151. [ The vehicle body (1) according to claim 1, wherein the insulator rubber (150) accommodates the main plate (110) 1) is provided on the surface of the insulator. 2. The apparatus of claim 1, wherein the main plate (110)
A vertical portion 111 contacting the first support portion 151 of the insulator rubber 150;
A horizontal portion 112 which is in contact with an upper surface of the second support portion 152 of the insulator rubber 150 and extends in a radial direction at one end of the vertical portion 111; And
And an extension 113 extending in a direction perpendicular to an end of the horizontal portion 112 so as to be in contact with a side surface of the second support portion 152 at an end of the horizontal portion 112 Insulator of suspension. 4. The insulator of claim 3, wherein the reinforcing plate (160) is mounted parallel to the horizontal portion (112). The insulator of claim 1, wherein the first support part (151) and the second support part (152) are integrally formed.

Images