KR20170041180A - Disc brake device - Google Patents

Abstract

The present invention relates to a disk brake device. The disk brake device comprises: a hub into which an axle is inserted; a flange unit mounted on the hub; a rotor mounted on the hub and the flange unit by a mounting bolt; a first and a second disk mounted on both sides of the rotor; a pair of brake pads tightly attached to the first and the second disk to generate a braking force; a piston which is operated by a hydraulic pressure and moves the brake pads towards the first and the second disk; and a caliper to support the brake pads and the piston. The rotor is made of aluminum or an aluminum alloy with high thermal conductivity. According to the disk brake device, the rotor is made of aluminum or an aluminum alloy to reduce a weight to improve fuel efficiency. Heat generated by a disk is easily transferred to the rotor to prevent a crack in the disk.

Description

Disc Brake Device {DISC BRAKE DEVICE}

The present invention relates to a disc brake apparatus, and more particularly, to a disc brake apparatus having improved brake performance.

A disc brake device mounted on a vehicle is a device for decelerating or stopping and stopping the vehicle while driving. The disc braking device obtains the braking force by strongly pressing both sides of a disk or a disk rotating together with the wheel or the wheel with the brake pads.

Conventional disc brake devices include discs that rotate with wheels or wheels, brake pads disposed on both sides of the disc, pistons to press brake pads toward the disc, and calipers that support the pistons and brake pads.

Since the disc is formed integrally with the rotor, the rotor is also replaced when the disc is worn due to disc wear, resulting in a cost due to unnecessary parts to be replaced. In addition, when the conventional disk and the rotor are integrally formed, they are made of spheroidal graphite cast iron, and the weight of the brake device is increased, thereby increasing the fuel efficiency of the vehicle.

In addition, since the material of the rotor of the conventional disc brake apparatus is made of the same material as that of the disc, the heat generated during the brake operation is not easily discharged to the outside, causing surface cracking of the disc due to deterioration.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a disc brake apparatus that improves the cooling speed of a disc, improves vehicle fuel economy, and improves brake stability.

In order to solve the above-described problems, the present invention provides a hub comprising: a hub into which an axle is inserted; A flange portion coupled with the hub; A rotor coupled to the hub and the flange by a coupling bolt; First and second disks coupled to opposite sides of the rotor; A pair of brake pads which are in close contact with the first and second disks to generate a braking force; A piston which is operated by hydraulic pressure and moves the brake pads toward the first and second disks; And a caliper for supporting the pair of brake pads and the piston, wherein the rotor is formed of aluminum or an aluminum alloy having a high thermal conductivity.

The first or second disk may be made of spheroidal graphite cast iron.

And a coupling portion for coupling the first and second disks to both sides of the rotor at a center, the coupling portion having a first screw hole formed adjacent to an outer side of the first disk; A second screw hole formed adjacent to an inner side of the first disk; A third screw hole formed on the second disk to correspond to the first screw hole; A fourth screw hole formed in the second disk so as to correspond to the second screw hole; A first coupling hole formed in the rotor and corresponding to the first and third screw holes; A second coupling hole formed in the rotor and corresponding to the second and fourth screw holes; A first fastening portion which is fastened through the first and third screw holes and the first engagement hole; And a second fastening portion which is fastened through the second and fourth screw holes and the second engagement hole.

The width of the brake pad may be smaller than or equal to the distance between the first screw hole and the second screw hole.

The rotor may have a VANE shape in which protrusions and exhaust passages are formed on at least one surface so as to intersect with each other.

The hub may be formed of spheroidal graphite cast iron, and the flange portion may be formed of aluminum or an aluminum alloy.

The disc brake apparatus according to the embodiment of the present invention can separate the rotor and the two discs, respectively, and then manufacture and combine the rotor and the two discs to increase the responsiveness to the expansion and contraction of the disc, thereby enhancing the safety of the brake.

Since the rotor of the disc brake apparatus according to the embodiment of the present invention is made of aluminum or aluminum alloy which is light in weight and high in thermal conductivity, heat generated in the disc during brake operation is easily discharged to the outside through the rotor, Cracks can be prevented and the braking force can be improved.

The disc brake device according to the embodiment of the present invention can reduce the weight of the brake device by reducing the weight by 30% or more by making the rotor and the flange part made of aluminum or an aluminum alloy material, thereby improving fuel economy, increasing chassis permanence, Reducing exhaust gas, and shortening braking distance.

The disk brake apparatus according to the embodiment of the present invention uses a rotor of aluminum material, so that noise can be reduced.

1 is a perspective view illustrating a disc brake apparatus according to an embodiment of the present invention;
2 is an exploded perspective view of the disc brake apparatus shown in FIG.
Fig. 3 is an exploded view of a portion of the disc brake apparatus shown in Fig. 1; Fig.
4 is a perspective view showing a coupling relationship between the rotor and the first and second disks shown in Fig. 2;

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 4 attached hereto.

FIG. 1 is a perspective view illustrating a disc brake apparatus according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the disc brake apparatus shown in FIG. 1, Of the incision.

1 to 3, a disc brake apparatus according to an embodiment of the present invention includes a hub 160, a flange unit 170, a rotor 100, a first disc 110, a second disc 120, A pad 150, a caliper 130, and a piston 140.

Specifically, the hub 160 is provided with a hollow portion into which the axle is inserted. The hub 160 may be formed in a stepped manner so that a bearing (not shown) for mounting an axle is mounted inside the hollow portion.

The hub 160 may be formed of a spheroidal graphite cast iron material. The material of the hub 160 can be made of spheroidal graphite cast iron spheroidized graphite in cast iron to reduce weight and ensure strength. In particular, since spheroidal graphite cast iron spheroidizes graphite, the mechanical properties of cast iron are greatly improved and abrasion resistance is also excellent, so that the life of hub 160 can be improved and mechanical strength can be guaranteed.

The hub 160 is preferably manufactured to have a weight of about 8 to 15 kg, and the tensile strength is preferably about 70 kg / mm ² .

The flange portion 170 is coupled to the hub 160 and can be coupled to other parts of the vehicle body. The flange portion 170 is engaged by the coupling bolt 210, which is a stud bolt for hub coupling when engaged with the hub 160.

The flange portion 170 is made of aluminum or an aluminum alloy material to reduce the weight. In addition, the flange portion 170 uses an aluminum alloy material to increase the strength, for example, AL6082 or AC4CH. In addition, the flange unit 170 can be used by heat-treating the material such as the AL6082 or AC4CH according to the vehicle, such as T6 or T7.

AL6082 can have a composition ratio as shown in Table 1.

Element %  Present Si 0.7-1.3 Fe 0.0-0.5 Cu 0.0-0.1 Mn 0.4-1.0 Mg 0.6-1.2 Zn 0.0-0.2 Ti 0.0-0.1 Cr 0.0-0.25 Al Balance

In addition, AL6082 has physical properties as shown in Table 2.

Property Value Density 2700 kg / m ³ Melting Point 555 ° C Modulus of Elasticity 70 GPa Electrical Resistivity 0.038x10 ^-6 ohm.m Thermal Conductivity 180 W / m.K Thermal Expansion 24x10 ^-6 / K

Here, the flange portion 170 can be manufactured to have a weight of about 5 to 6 kg, and in the embodiment of the present invention, it is made to have a weight of 5.6 kg.

The hub 160 and the flange portion 170 may be formed with holes 162 and 172, respectively, to be coupled with the rotor 100.

Meanwhile, the present invention may further include a metal ring pulse 180 at the end of the hub 160 to detect the wheel speed of the anti-rock brake system (ABS). The ring pulse 180 is formed to have protrusions protruding outward at regular intervals along the entire circumference at one side of the edge portion.

The rotor 100 is coupled to the hub 160 and receives rotation torque from the axle to rotate. The rotor 100 is formed at its center with a hollow hole corresponding to the hollow portion of the hub 160. The rotor 100 is provided with a hub coupling portion 106 which is coupled to the hub 160 at the periphery of the hollow hole. At this time, the rotor 100 is formed to have the same size as the inner circumferential surface of the hollow hole and the outer circumferential surface of the hub 160 so that the hub 160 is inserted and coupled.

The hub coupling portion 106 is formed to protrude from one surface of the rotor 100 and includes a coupling hole 210 for coupling the hub 160 and the rotor 100 by bolts such as stud bolts, (105) may be formed.

The fastening holes 105 are formed to correspond to the holes 162 and 172 formed in the hub 160 and the flange portion 170. Accordingly, the rotor 100, the hub 160, and the flange portion 170 are engaged by the coupling bolts 210.

Protrusions 108 and an exhaust passage 107 may be provided on at least one surface of the rotor 100. The protrusion 108 and the exhaust passage 107 provide a passage for discharging the heat generated from the rotor 100 or the first and second disks 110 and 120 to the outside during the brake operation. The protrusion 108 and the exhaust passage 107 have a VANE shape formed to intersect with each other. At this time, the protruding portion 108 may be formed in a streamlined shape from the hollow hole side of the rotor 100 to the outer side direction, so that the exhaust flow path 107 may have a streamlined shape.

The rotor 100 may have a first coupling hole 102 and a second coupling hole 104 formed therein. The first coupling hole 102 and the second coupling hole 104 will be described later in detail when the coupling relationship of the first and second disks 110 and 120 is explained.

The rotor 100 is formed of aluminum or an aluminum alloy so that heat generated from the first and second disks 110 and 120 is effectively discharged to the outside during a brake operation. Particularly, the rotor 100 absorbs the heat generated from the first and second disks 110 and 120, and the heat resistant aluminum having high strength can be used.

The rotor 100 may be made of aluminum or an aluminum alloy such as the flange portion 170. At this time, the weight of the rotor 100 is preferably about 4.5 Kg to 5.5 Kg.

The rotor 100 may be formed of aluminum or an aluminum alloy such as the flange portion 170 described above and has characteristics as shown in Tables 1 and 2.

The first disk 110 is coupled to one surface of the rotor 100 and the second disk 120 is coupled to the other surface of the rotor 100. The first and second discs 110 and 120 are brought into close contact with the brake pads 150 to generate a braking force.

The first and second disks 110 and 120 are formed of spheroidal graphite cast iron. The first and second disks 110 and 120 may be formed to have a weight of about 10 to 11 Kg. The first and second disks 110 and 120 may be formed of spheroidal graphite cast iron to have wear resistance.

The brake pad 150 is supported by the caliper 130. The brake pads 150 are brought into close contact with the first and second disks 110 and 120 to generate a braking force. The pair of brake pads 150 may be provided so as to be in close contact with the first disk 110 and the second disk 120, respectively. Each of the brake pads 150 may have a friction pad attached to its inner surface. The brake pad 150 is moved toward the first and second disks 110 and 120 by the piston 140. [

When the brake pedal of the vehicle is operated, the piston 140 is actuated by hydraulic pressure to move the brake pad 150 toward the first and second disks 110 and 120.

4 is an exploded perspective view showing a coupling relationship between the rotor and the first and second disks shown in Fig.

As shown in FIG. 4, the first and second disks 110 and 120 are coupled to both sides of the rotor 100. At this time, the rotor 100 and the first and second disks 110 and 120 are provided with a plurality of screw holes 112, 114, 122 and 124, a plurality of coupling holes 102 and 104, (220, 230) may be provided.

Specifically, the first disk 110 is formed with first and second screw holes 114, and the second disk 120 is formed with third and fourth screw holes 124.

A plurality of first screw holes 112 are formed adjacent to the outer side of the first disk 110 and a plurality of second screw holes 114 are formed adjacent to the inner side of the first disk 110.

A plurality of third threaded holes 122 are formed adjacent to the outer side of the second disk 120 and a plurality of fourth threaded holes 124 are formed adjacent to the inner side of the second disk 120.

At this time, the first screw hole 112 and the third screw hole 122 are formed at positions corresponding to each other, and the second screw hole 114 and the fourth screw hole 124 are formed at positions corresponding to each other.

The first coupling hole 102 is formed in the rotor 100 and is formed adjacent to the outer side of the rotor 100. The first coupling hole 102 is formed to correspond to the first and third screw holes 112 and 122.

The second coupling hole 104 is formed in the rotor 100 and is formed to correspond to the second and fourth screw holes 114 and 124.

The first fastening part 220 passes through the first and third screw holes 112 and 122 and the first fastening hole 102 and is fastened. At this time, the first fastening part 220 may be a shape in which a bolt and a nut are coupled.

The second fastening part 230 passes through the second and fourth screw holes 114 and 124 and the second fastening hole 104 and is fastened. The second fastening part 230 may have a shape in which a bolt and a nut are coupled to each other like the first fastening part 220.

It is preferable that the first and second fastening portions 220 and 230 are made of a material having a reduced weight and a high strength. In particular, the total weight of the first and second fastening portions 220 and 230 is preferably less than 1 kg.

As described above, the disc brake apparatus according to the embodiment of the present invention can separate the rotor and the two discs, respectively, and then manufacture and combine them to increase the responsiveness to the expansion and contraction of the disc, thereby enhancing safety of the brake.

In this case, since the rotor of the disc brake unit is made of aluminum or aluminum alloy having a high weight and a high thermal conductivity, the heat generated in the disc can be easily discharged to the outside through the rotor during the brake operation, Can be improved.

Also, the disk brake device according to the embodiment of the present invention can reduce the weight of the brake device by reducing the weight of the rotor and the flange made of aluminum or an aluminum alloy material, thereby improving the fuel consumption.

In addition, since the disk brake device according to the embodiment of the present invention uses an aluminum material rotor, noise can be reduced.

100: Rotor
102: first coupling hole
104: second coupling hole
105: fastening hole
106: hub coupling portion
107:
108: protrusion
110: first disk
112: first screw hole
114: second screw hole
120: second disk
122: third screw hole
124: Fourth screw hole
130: caliper
140: Piston
150: Brake pad
160: Hub
162: hole
170: flange section
172: hole
180: Ring pulse
210: coupling bolt
220: first fastening part
230: second fastening portion

Claims (1)

A hub into which an axle is inserted and which is formed of spheroidal graphite cast iron;
A flange portion coupled to the hub and formed of AL6082 having high thermal conductivity and heat resistance with aluminum or an aluminum alloy;
A rotor coupled to the hub and the flange by a coupling bolt;
First and second disks disposed on both sides of the rotor and formed of a spheroidal graphite cast iron material;
A coupling unit coupling the first and second disks with the rotor interposed therebetween;
A pair of brake pads which are in close contact with the first and second disks to generate a braking force;
A piston which is operated by hydraulic pressure and moves the brake pads toward the first and second disks; And
And a caliper for supporting the pair of brake pads and the piston,
The rotor is formed of AL 6082 having a high thermal conductivity and heat resistance among aluminum or an aluminum alloy and has a VANE shape in which protrusions and exhaust passages are crossed on at least one surface,
The coupling portion
A first screw hole formed adjacent to an outer side of the first disk;
A second screw hole formed adjacent to an inner side of the first disk;
A third screw hole formed on the second disk to correspond to the first screw hole;
A fourth screw hole formed in the second disk so as to correspond to the second screw hole;
A first coupling hole formed in the rotor and corresponding to the first and third screw holes;
A second coupling hole formed in the rotor and corresponding to the second and fourth screw holes;
A first fastening portion which is fastened through the first and third screw holes and the first engagement hole; And
And a second fastening portion which is fastened through the second and fourth screw holes and the second fastening hole,
The brake pad
And a width of the first screw hole is smaller than or equal to a distance between the first screw hole and the second screw hole.

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