KR20140084734A - Light type disk brake using the different materials - Google Patents

Abstract

The present invention relates to a disc brake of a vehicle. More specifically, the present invention relates to a disc brake of a vehicle using heterogeneous materials, which comprises upper and lower plates made of stainless steel or gray cast iron; a hat unit including an outer surface made of carbon steel or aluminum alloy and attached between the upper and lower plates, a central surface forming a mounting surface mounted on a hub of the vehicle, and a connection surface connecting the outer surface to the central surface; and a bonding layer bonding the upper and lower surface of the outer surface with the upper and lower plates. The outer surface and the connection surface form one unit and a plurality of the units are formed on the central surface in all directions.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a light type disc brake using a different material,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a disc brake of an automobile, and more particularly, to a disc brake of an automobile including an upper plate and a lower plate made of gray iron or stainless steel; A hut part formed of a carbon steel or an aluminum alloy material and having an outer circumferential surface attached between the upper plate and the lower plate, a central surface constituting a mounting surface mounted on a hub of an automobile, and a connecting surface connecting the outer circumferential surface and the center surface; An adhesive layer for attaching the upper and lower surfaces of the outer circumferential surface to the upper and lower plates; And a plurality of the outer circumferential surfaces and the coupling surfaces are radially formed on the central surface, wherein the outer circumferential surfaces and the coupling surfaces form a single trough. .

Due to the shortage of oil energy and the problem of climate change, automobile companies around the world are concentrating on technology development to improve fuel efficiency. Among them, technology for improving fuel efficiency has been attracting attention as a technique for reducing the weight of the vehicle without degrading the performance.

In particular, the reduction in weight at the bottom of the vehicle directly affects the performance and fuel economy of the vehicle. The reduction in unsprung mass, which is directly related to the wheel drive load, Advances in technology have been very radical in recent years.

Among them, a method of reducing the weight of the brake disk, which occupies the main weight of the unsprung mass, is being watched.

Fig. 1 shows a general brake disk D. Fig. The brake disk D is composed of a disk plate D1 on which friction occurs during braking and a hatched part D2 (HAT PART) for mounting the disk plate D1 on a hub (not shown) of a vehicle.

The disk plate D1 and the hatched part D2 are all made of a gray cast iron which is made of a piece of graphite and has excellent braking characteristics such as vibration damping performance, damping performance, heat radiation performance and lubrication function.

However, due to the weight of the gray cast iron equivalent to 7.2 g / cm3, it has heavy disadvantages, which is a major cause of lower fuel efficiency.

Therefore, in order to reduce such characteristics, it is necessary to develop brake discs using different kinds of materials.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a brake disk structure which is strong in heat resistance, do.

According to an aspect of the present invention, there is provided a lightweight brake disc using a different material, comprising: a top plate and a bottom plate made of gray iron or stainless steel; A hut part formed of a carbon steel or an aluminum alloy material and having an outer circumferential surface attached between the upper plate and the lower plate, a central surface constituting a mounting surface mounted on a hub of an automobile, and a connecting surface connecting the outer circumferential surface and the center surface; An adhesive layer for attaching the upper and lower surfaces of the outer circumferential surface to the upper and lower plates; Wherein the outer circumferential surface and the connection surface form a single trough, and a single trough of the outer circumferential surface and the connection surface is radially formed on the central surface.

The light weight type brake disk using the different material of the present invention as described above has the effect of reducing the weight of the brake disk while improving the fuel efficiency of the automobile while maintaining the same level of braking characteristics as the single material brake disk using only the conventional gray iron I have.

In addition, although different materials made of aluminum, carbon steel and gray iron are used, the brake discs are firmly coupled to each other due to the adhesive layer, and are further fastened together with the clips. Therefore, the strength of the brake disc, which can meet the maximum braking torque of the automobile, There is an effect that can be.

In addition, in terms of thermal deformation, there is an effect of excellent heat resistance as compared with a single material brake disk made of conventional gray iron.

1 is a perspective view of a general brake disk,
2 is a plan view of the brake disk of the present invention,
3 is an exploded perspective view of the brake disk according to the present invention,
4 is a sectional view taken along line AA 'in Fig. 2,
5 is a sectional view taken along the line BB 'in Fig. 4,
6 is a cross-sectional view of the state in which the hatched portion is removed in the sectional view of Fig. 5;

Hereinafter, the construction of a lightweight disc brake using a different material of the present invention will be described in detail with reference to the drawings.

It is to be noted, however, that the disclosed drawings are provided as examples for allowing a person skilled in the art to sufficiently convey the spirit of the present invention. Accordingly, the present invention is not limited to the following drawings, but may be embodied in other forms.

In addition, unless otherwise defined, the terms used in the description of the present invention have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. In the following description and the accompanying drawings, A detailed description of known functions and configurations that may be unnecessarily blurred is omitted.

FIG. 2 is a plan view of the brake disk of the present invention, FIG. 3 is an exploded perspective view of the brake disk of the present invention, and FIG. 4 is a sectional view taken along line A-A 'of FIG.

Referring to the drawings, the brake disc 1 of the present invention includes a circular upper plate 10 and a lower plate 11 which are in contact with a brake system causing braking of the vehicle.

The upper plate 10 and the lower plate 11 are made of gray iron or stainless steel and preferably have a thickness of 5-10 mm. This is to reduce the total weight of the brake disc by applying a different kind of material having a smaller specific gravity than that of the gray cast iron to the specific gravity of the gray cast iron. In spite of applying different materials, the structural characteristics and the excellent braking characteristics maintain.

The HAT unit 20 of the present invention is coupled between the upper plate 10 and the lower plate 11. The hitting portion 20 is a portion for mounting the upper plate 10 and the lower plate 11 to a hub (not shown) of an automobile. As shown in the exploded perspective view of FIG. 3 and the cross- An outer circumferential surface 21 attached between the upper plate 10 and the lower plate 11, a central surface 22 constituting a mounting surface to be mounted on the hub of the automobile, and a connecting portion 22 connecting the outer circumferential surface 21 and the center surface 22 As shown in Fig.

The hight part 20 according to the present invention is preferably made of carbon steel or an aluminum alloy.

The connecting surface 23 is preferably sloped between the outer circumferential surface 21 and the center surface 22 and more preferably a carbon steel material having a thickness of 5 to 10 mm. A single set of the outer circumferential surface 21 and the connecting surface 23 is radially formed on the central surface 22, and 20-30 of such a single set are formed.

The upper and lower surfaces of the outer circumferential surface 21 and the upper and lower plates 10 and 11 are adhered to each other using an adhesive so that the upper and lower surfaces of the outer circumferential surface 21 and the upper and lower plates 10, The adhesive layer 30 is formed.

The hooks 41a and 41b are engaged with the upper face of the upper plate 10 and the lower face of the lower plate 11 for more reliable coupling between the hight 20 and the upper plate 10 and the lower plate 11 And at least one clip portion 40 for strongly joining the upper plate 10, the lower plate 11 and the outer peripheral surface 21 is bonded.

It is preferable to attach about 4 to 8 clip units 40 as needed. When a stronger coupling force is required, the bolts passing through the upper plate 10, the lower plate 11, and the outer circumferential surface 21, The coupling nut can make the coupling force stronger.

The outer circumferential surface 21 of the hitting portion 20 is coupled to the upper plate 10 and the lower plate 11 as shown in the sectional view taken along line BB ' A concave convex surface 11a and a concave convex convex surface 11b are formed on the upper surface of the lower plate 11 and then the concave concave surface 10a and convex convex surface 10b are formed on the lower surface of the upper plate 10, It is preferable to join the outer circumferential surface 21 between the concave surface 10a of the upper plate 10 and the concave surface 11a of the lower plate 11.

The upper plate 10 and the lower plate 11 may be manufactured by a casting or punching method. In the case of a casting method, a pipe-shaped casting is completed and sliced to a required thickness. When the punching method is employed, Processing.

The hight part 20 is manufactured by punching a plate material and then pressing it. The adhesive constituting the adhesive layer is preferably a structural adhesive capable of maintaining a high strength even at a high temperature and capable of withstanding a large load for a long time.

Preferably, the adhesive used to form the adhesive layer 30 is selected from the group consisting of a tack epoxy resin, a phenolic resin, and combinations thereof, and is heated at 250 DEG C for 30 minutes under a pressure of 1 bar or more after application of the adhesive And cured.

The composition of the upper plate 10 and the lower plate 11 division C (wt%) Si (wt%) Mn (wt%) P (wt%) S (wt%) Cr (wt%) Fe (wt%) Gray cast iron 3.0 to 3.8 1.0 to 2.8 1.0 or less 0.2 or less 0.15 or less - Rem.
(The remainder) Stainless steel 0.03 to 0.4 1.0 or less Not more than 1.5 - - 10.5 to 12.5 Rem.
(The remainder)

Table 1 is a table showing preferable compositions of the upper plate 10 and the lower plate 11 of the present invention.

(P) of more than 0% by weight and not more than 0.2% by weight, sulfur (0), sulfur (0) Not more than 0.15% by weight, and the remainder of iron, or

(Mn) in an amount of more than 0 wt% to 1.5 wt%, chromium (Cr) in an amount of 10.5 to 12.5 wt% or less, and the balance iron It is preferable to use a material having a strong friction characteristic and it is cast in a solid structure or a ventilation structure for heat radiation.

The composition of the hint 20 division C (wt%) Si (wt%) Mn (wt%) Ni + Cr (wt%) Fe (wt%) Carbon steel 0.4 to 0.6 0.15-0.35 0.6 to 0.9 0.35 or less Rem.
(The remainder)

Another composition of the hint 20 division Cu (wt%) Si (wt%) Mg (wt%) Zn (wt%) Fe (wt%) Mn (wt%) Cr (wt%) Al (wt%) aluminum
alloy 0.1 or less 1.3 or less 0.6 to 3.0 0.25 or less 0.5 or less 1.0 or less 0.35 or less Rem.
(The remainder)

Table 2 and Table 3 show the preferred compositions of the horn 20 of the present invention. As shown in the table, the horn 20 of the present invention has the composition shown in Table 2 when it is made of carbon steel And when it is made of an aluminum alloy material, it is preferable that the composition shown in Table 3 is used.

(Mn) of 0.6 to 0.9% by weight, the sum of nickel and chromium of more than 0% by weight and not more than 0.35% by weight, and the balance of A carbon steel material containing iron (Fe), or

More than 0 wt% and not more than 0.25 wt% of zinc (Zn), more than 0 wt% and less than 0.1 wt% of copper (Cu), more than 0 wt% More than 0 wt% to 0.5 wt%, manganese (Mn) to 0 wt% to 1.0 wt%, chromium to 0 wt% to 0.35 wt%, and the balance aluminum (Al).

Although the present invention has been described in connection with the specific embodiments of the present invention, it is to be understood that the present invention is not limited thereto. 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 by the appended claims and their equivalents. Various modifications and variations are possible.

Description of the Related Art [0002]
One; In the present invention,
10; Top plate
10a; Concave surface 10b; Mound
11; Bottom plate
11a; A concave surface 11b; Mound
20; HAT Department
21; Outer circumferential surface
22; Center plane
23; Connecting face
30; Adhesive layer
40; Clip portion
41a, 41b; Hook

Claims (6)

In a brake disc of an automobile,
An upper plate 10 and a lower plate 11 made of gray iron or stainless steel;
An outer circumferential surface 21 made of carbon steel or an aluminum alloy material and attached between the upper plate 10 and the lower plate 11, a central surface 22 constituting a mounting surface to be mounted on the hub of the automobile, And a connecting surface (23) connecting the center surface (22).
An adhesive layer 30 for attaching the upper and lower surfaces of the outer circumferential surface 21 and the upper and lower plates 10 and 11 to each other; And,
Characterized in that the outer circumferential surface (21) and the connecting surface (23) form a single set and a single set of the outer circumferential surface (21) and the connecting surface (23) is radially formed on the central surface (22) Lightweight disc brakes using materials.
The method according to claim 1,
At least one clip portion (41a, 41b) for fastening the upper plate (10), the lower plate (11) and the outer circumferential surface (21) by forming hooks (41a, 41b) to be hooked on the upper surface of the upper plate (10) 40) are bonded to each other. 3. The method according to claim 1 or 2,
Wherein the coupling between the upper plate (10), the lower plate (11), and the outer peripheral surface (21) is made by bolts and nuts passing through them.
The method according to claim 1,
A recessed concave surface 10a and a convex convex surface 10b are formed on the lower surface of the upper plate 10 and concave convex surfaces 11a and convex convex surfaces 11b are formed on the upper surface of the lower plate 11, Wherein the outer circumferential surface (21) is coupled between a concave surface (10a) of the upper plate (10) and a concave surface (11a) of the lower plate (11).
[2] The apparatus according to claim 1, wherein the upper plate (10) and the lower plate (11)
(P) more than 0% by weight and not more than 0.2% by weight of phosphorus, 0 to 0% by weight of phosphorus, (C) 3.0 to 3.8% by weight of silicon, 1.0 to 2.8% By weight and less than 0.15% by weight, and the balance iron,
or,
(Mn) in an amount of more than 0 wt% to 1.5 wt%, chromium (Cr) in an amount of 10.5 to 12.5 wt% or less, and the balance iron Wherein the disc brakes are made of a stainless steel material.
The hood according to claim 1, wherein the hight part (20)
Wherein the total amount of nickel and chromium is more than 0 wt% and not more than 0.35 wt%, and the remainder of the iron ((C) is from 0.4 to 0.6 wt%, silicon is from 0.15 to 0.35 wt%, manganese is from 0.6 to 0.9 wt% Fe), < / RTI >
or,
More than 0 wt% and not more than 0.25 wt% of zinc (Zn), more than 0 wt% and less than 0.1 wt% of copper (Cu), more than 0 wt% , More than 0 wt% to 0.5 wt%, manganese (Mn) to 0 wt% to 1.0 wt%, chromium to 0 wt% to 0.35 wt% and aluminum (Al) Lightweight disc brakes using different materials.

Images