KR101745185B1

KR101745185B1 - Bushing for automobiles

Info

Publication number: KR101745185B1
Application number: KR1020150167464A
Authority: KR
Inventors: 김택진; 정석훈; 김찬홍; 채희창; 김준홍
Original assignee: 김택진
Priority date: 2015-11-27
Filing date: 2015-11-27
Publication date: 2017-06-09
Also published as: KR20170062072A

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a subframe fixing device for an automobile, which improves the handling performance and steering stability during automobile operation by supplementing a space between a subframe and a bolt with a bushing for a vehicle, And a bushing for a vehicle that can prevent a vehicle rolling phenomenon and a wheel alignment torsion phenomenon.
According to an aspect of the present invention, there is provided an automotive bushing comprising: a cylindrical body portion hollowed to allow a bolt to be inserted; A flange portion of a metal material protruding from the lower end of the body portion in an outer radial direction; And a fiber reinforced layer wound on the outer circumferential surface of the body part by carbon fiber impregnated with a thermosetting resin.

Description

BUSHING FOR AUTOMOBILES

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a bushing for an automobile, and more particularly, to a bushing for an automobile which, when a subframe is mounted on a vehicle, To a vehicle bushing capable of preventing a rolling phenomenon of a vehicle body and a wheel alignment from occurring during traveling.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension of a vehicle, and more particularly to a bushing used for a lower arm and an upper arm of a vehicle.

BACKGROUND ART [0002] Generally, an automobile is provided with a suspension device for connecting a frame and an axle to improve ride comfort and safety of a vehicle so that a vibration or an impact received from the road surface during traveling can be buffered and transmitted to the vehicle and the occupant.

The suspension system of a vehicle is a device necessary for ensuring safety due to ride comfort and external collision, and for adjusting the stability of a traveling vehicle.

The suspension consists of a linkage, a spring, a shock absorber, a stabilizer and a suspension arm, and a subframe is used to be fixed to the vehicle body.

The subframe is part of the suspension structure.

The types of the surf frame include a front sub frame, a rear sub frame, a lower arm, and an upper arm.

Depending on the form of the sub-frame, there are a well-shaped sub-frame and an H-shaped sub-frame.

Generally, a bolt tightening method is used to fix the subframe to the vehicle.

There is a gap between the bolt and the sub-frame fastening part when the sub-frame is fastened to the vehicle body using the conventional bolt tightening method, thereby causing a rolling phenomenon of the vehicle body and warping of the wheel curtain while the vehicle is running.

An invention such as a registration No. 10-0227384 which improves the steering stability of the vehicle at the time of turning and braking of the vehicle by mounting a bushing therebetween in order to eliminate the space generated between the subframe and the bolt It was proposed.

Korean Patent Registration No. 10-0227384 (entitled "Automobile Bushing") is composed of an inner pipe, an outer pipe and a buffer rubber.

In the case of such a general bushing, since it is made of a metal material and a rubber material, not only the weight of the automobile is increased but also the wear life is not long.

In addition, the automotive bushing thus configured has a problem of component damage due to low temperature brittle fracture of the rubber.

Also, in the case of a rubber bushing, there is a problem in deformation of the bushing.

Therefore, by adding a bushing between the subframe of the vehicle and the bolt, it is possible to improve the running stability of the vehicle, prevent the body rolling phenomenon and the wheel alignment from being distorted, and use a lightweight bushing made of an aluminum alloy material coated with carbon fiber So as to reduce the weight burden and abrasion added to the automobile.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a vehicle bushing structure capable of improving the handling performance and steering stability And to provide a bushing for a vehicle which can prevent a vehicle rolling phenomenon and a wheel alignment torsion phenomenon.

According to an aspect of the present invention, there is provided an automotive bushing comprising: a cylindrical body portion hollowed to be inserted with a bolt; A flange portion of a metal material protruding in an outer radial direction from a lower end of the body portion; And a fiber reinforced layer wound on the outer circumferential surface of the body part with carbon fibers impregnated with a thermosetting resin.

At this time, the body portion may include a protrusion protruding from the lower end of the outer circumferential surface adjacent to the flange portion.

In addition, the body may include aluminum or an aluminum alloy.

Wherein the fiber reinforcing layer comprises a hollow cylindrical metal layer; A first reinforcing layer wound on an outer surface of the metal layer; A hollow layer formed on the outer surface of the first reinforcing layer and having a space therein; A second reinforcing layer wound on the outer surface of the hollow layer; And a coating layer coated on the outer surface of the second reinforcing layer with a metal.

Wherein the fiber reinforcing layer comprises a hollow cylindrical metal layer; A hollow layer formed on an outer surface of the metal layer and having a space therein; A second reinforcing layer wound on the outer surface of the hollow layer; And a coating layer coated on the outer surface of the second reinforcing layer with a metal.

Wherein the fiber reinforcing layer comprises a hollow cylindrical metal layer; A first reinforcing layer wound on an outer surface of the metal layer; A second reinforcing layer wound on an outer surface of the first reinforcing layer; And a coating layer coated on the outer surface of the second reinforcing layer with a metal.

Wherein the fiber reinforcing layer comprises a hollow cylindrical metal layer; A first reinforcing layer wound on an outer surface of the metal layer; A hollow layer formed on the outer surface of the first reinforcing layer and having a space therein; And a coating layer coated on the outer surface of the hollow layer with a metal.

The present invention as described above has the following effects.

In mounting the subframe mounted on the suspension to the vehicle, the space created between the subframe and the bolt is supplemented with a bushing to improve the handling performance during operation, thereby improving the stability of the vehicle operation, Can be prevented.

Also, there is a noise reduction effect due to the bushing clearance.

In addition, there is an effect of reducing the rolling phenomenon of the vehicle body during traveling.

In addition, there is an effect of reducing the pitching phenomenon that occurs when the bare tongue is talking.

In addition, there is an effect of reducing the fish tail phenomenon that the rear part of the vehicle shakes when traveling at high speed.

In addition, by using the fiber reinforced layer wound with the lightweight carbon fiber, the strength, specific gravity and impact resistance are improved as compared with the bush made of the metal material, so that even if the bushing is added to the automobile, And it has the effect of not being easily abraded.

In addition, since the body portion of the bushing uses aluminum or an aluminum alloy, the weight can be reduced by 20 to 30% in comparison with a conventional metal bushing. This weight reduction is effective in improving fuel economy.

1 is a plan view of a general vehicle subframe of the present invention.
Fig. 2 is a state diagram showing an embodiment in which an automotive bushing according to the first embodiment of the present invention is used. Fig.
3 is a perspective view showing an automotive bushing according to the first embodiment of the present invention.
FIG. 4 is a cross-sectional view showing a cross section according to the first embodiment of the automotive bushing according to FIG. 3 of the present invention.
5 is a plan view of the cross section taken along line a-a 'of FIG. 4 from above.
6 is a cross-sectional view showing a cross section of an automotive bushing according to a second embodiment of the present invention.
7 is a cross-sectional view showing a cross section of an automotive bushing according to a third embodiment of the present invention.
8 is a cross-sectional view showing a cross section of an automotive bushing according to a fourth embodiment of the present invention.

Hereinafter, the description of the present invention with reference to the drawings is not limited to a specific embodiment, and various transformations can be applied and various embodiments can be made. It is to be understood that the following description covers all changes, equivalents, and alternatives falling within the spirit and scope of the present invention.

In the following description, the terms first, second, and the like are used to describe various components and are not limited to their own meaning, and are used only for the purpose of distinguishing one component from another component.

Like reference numerals used throughout the specification denote like elements.

As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It is also to be understood that the terms " comprising, "" comprising, "or" having ", and the like are intended to designate the presence of stated features, integers, And should not be construed to preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 8 attached hereto.

Fig. 1 is a plan view of a general subframe for a vehicle, and Fig. 2 is a use state diagram showing an embodiment in which an automotive bushing according to a first embodiment of the present invention is used.

Referring to FIGS. 1 and 2, the subframe 10 includes an insertion portion 20, and it can be seen that the automotive bushing 100 is inserted therein.

The subframe 10 can be used to firmly mount automobile parts such as an engine of an automobile and a suspension device before and after a drive shaft on an automobile frame.

The subframe 10 may have a cylindrical shape with a hollow portion, and the bolt 30 may be inserted into the hollow portion.

A washer 40 is formed between the bolt 30 and the automobile bushing 100. [

The washer 40 can disperse the pressure to protect the surface of the automotive bushing 10.

In addition, the washer 40 can improve the fastening effect of the bolt 30 and the automotive bushing 10. [

By inserting the bolt 30 into the insertion portion 20, the parts of the automobile can be firmly engaged.

In addition, detachment of the vehicle frame from the automobile frame can be facilitated when repairing automobiles.

However, there is a problem that a clearance is generated between the hollow portion formed in the insertion portion 20 and the bolt 30 fastened to the insertion portion 20, so that the bushing 100 for an automobile is inserted between the insertion portion 20 and the bolt 30 The bushing clearance can be eliminated by fitting into the space.

3 is a perspective view showing an automotive bushing according to the first embodiment of the present invention.

Referring to FIG. 3, it can be seen that the automotive bushing 100 includes the body part 200 and the flange part 300.

The body part 200 may be inserted into the insertion part 20 of the subframe 10 and may be formed of a cylindrical hollow part 220 which is hollow so that the bolt 30 can be inserted thereinto.

At this time, the body part 200 may include a protrusion 210 protruding outward at the lower end of the outer circumferential surface adjacent to the flange part 300.

The protrusion 210 may be formed to match the inner diameter of the insert 20 according to the shape of the body 200.

As such, the protrusion 210 can prevent the body part 200 from being easily detached from the insertion part 20 by firmly inserting the body part 200 into the insertion part 20.

Since the protrusion 210 is provided to prevent the body part 200 from being easily detached from the insertion part 20 after it is inserted into the insertion part 20, the protrusion part 210 may be formed as a smooth surface without protrusions 210, Will be obvious to those skilled in the art.

The flange portion 300 may be formed in the outer radial direction at the lower end of the body portion 200. [ The flange portion 300 is formed so that the body portion 200 is not completely inserted between the insertion portion 20 and the bolt 30 but is caught by the outer peripheral surface of the insertion portion 20. [

The flange portion 300 may be made of a metal material including aluminum or an aluminum alloy, but is not limited to such a range.

4 is a cross-sectional view showing a cross section according to a first embodiment of the automotive bushing according to the present invention shown in FIG. 3, and FIG. 5 is a plan view showing a cross section taken along the line a-a 'of FIG.

Referring to FIGS. 4 and 5, it can be seen that the body portion 200 of the automotive bushing 100 is composed of the fiber-reinforced layer 400.

The fiber reinforced layer 400 may comprise a metal layer 410, a first reinforcing layer 420, a hollow layer 430, a second reinforcing layer 440 and a coating layer 450.

The metal layer 410 may be made of the same material as that of the flange part 300. However, the material of the metal layer 410 may be different according to the necessity or convenience of the user, like the flange part 300. Since the metal layer 410 forms the outer surface of the body 200, the metal layer 410 may have a hollow cylindrical shape. At this time, the metal layer 410 can be formed by forming the flange portion 300 together by a general molding method. However, it will be appreciated that the flange portion 300 may be formed after the metal layer 410 is formed according to the needs and convenience of the user, and the flange portions 300 may be joined by welding or the like.

It may then be desirable to form the first enhancement layer 420 at an arbitrary winding angle on the outer surface of the metal layer 410. At this time, it is preferable that the first reinforcing layer 420 is made of carbon fiber impregnated with a thermosetting resin.

The first reinforcing layer 420 can be formed by winding the carbon fiber impregnated with the thermosetting resin on the metal layer 410 and then curing the carbon fiber at the curing temperature of the thermosetting resin.

For reference, carbon fiber is lighter than metal and has better elasticity and strength than a metal material. Therefore, strength, specific gravity, impact resistance, heat resistance, and the like can be improved by using carbon fiber for the first reinforcing layer 420.

The hollow layer 430 may be formed on the outer surface of the first reinforcing layer 420 by forming a block of carbon fiber material having a space therein.

The hollow layer 430 may be formed of two or more blocks having a curvature along the body 200 of the automotive bushing 100 and may be bonded to the outer surface of the first reinforcing layer 420 using an adhesive or the like. However, the present invention is not limited to providing an adhesive only by using the method of bonding the hollow layer 430 of the present invention to the first reinforcing layer 420, and the hollow layer 430 may be formed on the outer surface of the first reinforcing layer 420 It will be appreciated by those skilled in the art that any conventional techniques may be employed.

At this time, there is an advantage that the weight due to the automotive bushing 100 added to the automobile can be minimized by forming an internal space.

The second reinforcing layer 440 may be formed on the outer surface of the hollow layer 430 at an arbitrary winding angle. Like the first reinforcing layer 420, the second reinforcing layer 440 may be formed of a thermosetting resin- Carbon fiber.

The fiber reinforced layer 400 as one embodiment of the present invention has a structure in which the first reinforcing layer 420 is wound on the outer surface of the metal layer 410 and the hollow layer 430 is formed thereon and then the second reinforcing layer 440 , It may be desirable to finally form a coating layer 450 made of a metal material.

For reference, the filament winding method is a method in which resin is wound on a spinning mandrel to form an axially symmetric composite material.

The carbon fiber is excellent in impregnation property and is preferable for using a thermosetting resin.

As the thermosetting resin, materials such as epoxy, polyester and vinyl ester can be used. The thermosetting resin may be formed of 95 to 99 parts by weight of epoxy and 1 to 5 parts by weight of carbon nanotubes.

In addition, the first and second reinforcing layers 420 and 440 may have different materials depending on the needs and convenience of the user.

The material used for the first and second reinforcing layers 420 and 440 can be a mixture of Kevlar fiber, glass fiber, aramid fiber, stainless steel fiber, metal fiber, cellulose-based regenerated fiber and protein-based regenerated fiber in addition to carbon fiber .

In another embodiment (not shown), the first and second reinforcing layers 420 and 440 may be formed by mixing carbon fibers and glass fibers. In this case, the first and second reinforcing layers 420 and 440 may be formed of 70 to 80 parts by weight of carbon fibers and 20 to 30 parts by weight of glass fibers.

The first and second reinforcing layers 420 and 440 may be formed by a carbon fiber filament winding method. However, it will be appreciated that the first and second reinforcing layers 420 and 440 may be combined with the body part 200 and the flange part 300 by welding or the like, depending on the needs and convenience of the user.

Next, an automotive bushing according to another embodiment of the present invention will be described. A bushing for an automobile according to another embodiment of the present invention will be described focusing on a difference from a bushing for a vehicle according to the first embodiment of the present invention.

FIG. 6 is a cross-sectional view of a bushing for a vehicle according to a second embodiment of the present invention, and FIG. 7 is a cross-sectional view of a bushing for a vehicle according to a third embodiment of the present invention. And FIG. 8 is a cross-sectional view showing a cross section of an automotive bushing according to a fourth embodiment of the present invention.

6 to 8, the fiber reinforced layer 400 constituting the body portion 200 of the automotive bushing 100 includes the first reinforcing layer 420 excluding the metal layer 410 and the coating layer 450, The hollow layer 430 and the second reinforcing layer 440 are formed differently according to the needs and the convenience of the user, the automotive bushing 100 can be manufactured.

6, the fiber-reinforced layer 400 may include a second reinforcing layer 440 and a hollow layer 430 between the metal layer 410 and the coating layer 450. [

7, the fiber-reinforced layer 400 may include a first reinforcing layer 420 and a second reinforcing layer 440 between the metal layer 410 and the coating layer 450. In addition, as shown in FIG.

8, the fiber-reinforced layer 400 may include a first reinforcing layer 420 and a hollow layer 430 between the metal layer 410 and the coating layer 450. [

It should be understood, however, that the scope of the present invention is not limited to the above-described embodiments, and that the fiber reinforcement layer 400 may include the first reinforcement layer 420 excluding the metal layer 410 and the coating layer 450 ), The hollow layer 430 and the second reinforcing layer 440, as will be appreciated by those skilled in the art.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be clear to the person.

10: subframe
20:
30: Bolt
40: Washer
100: Automotive bushings
200:
210:
220: hollow portion
300: flange portion
400: fiber reinforced layer
410: metal layer
420: first reinforcing layer
430: hollow layer
440: second reinforcing layer
450: Coating layer

Claims

In an automotive bushing,
A cylindrical body portion hollowed out so that the bolt can be inserted therein;
A flange portion of a metal material protruding in an outer radial direction from a lower end of the body portion; And
And a fiber reinforced layer wound on the outer circumferential surface of the body part with carbon fibers impregnated with a thermosetting resin,
The fiber-
A hollow cylindrical metal layer; A first reinforcing layer wound on an outer surface of the metal layer; A hollow layer formed on the outer surface of the first reinforcing layer and having a space therein; A second reinforcing layer wound on the outer surface of the hollow layer; And a coating layer on the outer surface of the second reinforcing layer, the coating layer being metal-coded;
Or a hollow cylindrical metal layer; A hollow layer formed on an outer surface of the metal layer and having a space therein; A second reinforcing layer wound on the outer surface of the hollow layer; A coating layer coated on the outer surface of the second reinforcing layer with a metal;
Or a hollow cylindrical metal layer; A first reinforcing layer wound on an outer surface of the metal layer; A second reinforcing layer wound on an outer surface of the first reinforcing layer; A coating layer coated on the outer surface of the second reinforcing layer with a metal;
Or a hollow cylindrical metal layer; A first reinforcing layer wound on an outer surface of the metal layer; A hollow layer formed on the outer surface of the first reinforcing layer and having a space therein; A coating layer coated on the outer surface of the hollow layer with a metal; Lt; / RTI >
The hollow-
And two or more blocks having a curvature along the body portion,
Wherein when the bushing is inserted into the subframe, the body is not completely inserted into the insertion portion of the subframe, and space is formed between the insertion portion of the subframe and the body.

The method according to claim 1,
Wherein the body portion includes a protrusion protruding from the lower end of the outer circumferential surface adjacent to the flange portion.

The method according to claim 1,
Wherein the body portion comprises aluminum or an aluminum alloy.

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