KR20170043284A - Brake disc comprising a plurality of pillar - Google Patents

Abstract

The present invention relates to a brake disk. A brake disk according to the present invention includes a hub connected to a wheel of a vehicle and a pair of plates extending radially from the hub and facing each other and spaced a predetermined distance in parallel, Wherein the plurality of pillar assemblies are spaced apart from each other by a predetermined angle in the circumferential direction about a rotation axis of the brake band, and each of the pillar assemblies is provided with a plurality of pillar assemblies At least five pillars are radially outwardly directed from the rotating shaft, and at least two pillars among the five pillars forming the pillars are disposed symmetrically with respect to each other.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a brake disk having a plurality of pillars,

The present invention relates to a brake disc having a plurality of pillars.

Generally, automobiles can travel at a high speed, and various systems for safety of driver and / or passenger are being developed. Among these stabilizers, the brake system is the most basic and important system that provides braking power to the moving vehicle.

The brake disk of the automobile brake system generally includes a hub connected to the wheels of the automobile and a brake band connected to the hub. Here, the brake band has a pair of plates facing each other.

In this case, the brake band converts the kinetic energy of the wheels of the automobile into heat energy by friction. At this time, the heat generated in the brake band by the heat energy may cause deformation or damage of the brake disk at a very high temperature. Accordingly, techniques have been developed to cause air flow between the plates of the brake band during braking to lower the temperature of the brake band by heat transfer.

6 shows a structure of a brake disc 10 disclosed in Korean Patent Laid-Open Publication No. 10-2012-0101449 (hereinafter referred to as "prior patent").

Referring to FIG. 6, the brake disk 10 has a hub 12 and a brake band connected to the hub 12. The hub 12 is connected to a wheel (not shown) by a fastening hole 14. Further, a plurality of pillars 16, 18 are provided between the plates of the brake band.

The filler of the prior patent is composed of three stages radially outward from the rotation axis of the brake disc 10 as shown in Fig. The first inner filler 16A and the second outer filler 16B are formed in an approximately oval shape and the outer third filler 18 has a deformed elliptical shape. According to the filler structure of the above-mentioned prior patent, the flow of air from the rotating shaft of the brake disk 10 toward the outside is caused during braking.

However, the filler structure of the prior patent is composed of three stages with a relatively small number of stages. Furthermore, the pillars at each stage have an elliptical shape and are disposed in the longitudinal direction radially outward from the rotational axis, A large flow resistance is generated. Accordingly, the filler structure of the prior patent greatly degrades the heat transfer efficiency, so that the heat generated in the brake band can not be effectively released.

1. Korean Patent Publication No. 10-2012-0101449

In order to solve the above-mentioned problems, the present invention has been made to solve the above problems, and it is an object of the present invention to provide a brake disk capable of effectively reducing heat generated in a brake band of a brake disk, And to provide the above-mentioned objects.

It is an object of the present invention to provide a hybrid vehicle having a hub connected to a wheel of a vehicle and a pair of plates extending radially from the hub and parallel to each other and spaced a predetermined distance apart from each other, And a plurality of pillar assemblies each having a plurality of pillar assemblies forming a ventilation channel, the plurality of pillar assemblies being spaced apart from each other by a predetermined angle in the circumferential direction about a rotation axis of the brake band, Wherein at least two pillars among the five pillars constituting the pillar assembly are arranged symmetrically with respect to each other, characterized in that at least two pillars among the five pillars constituting the pillar assembly are arranged symmetrically with respect to each other do.

At least one of the five pillars forming the filler aggregate may have an airfoil shape in cross section. For example, the filler of the first stage among the five stages of fillers forming the filler aggregate may be arranged such that its cross section has an airfoil shape and its cross section is narrowed outward in the radial direction from the rotation axis of the brake band have.

The pillars of the second stage and the pillars of the fourth stage among the five stages of pillars forming the filler aggregate may have elliptical cross sections and be arranged symmetrically with respect to each other. In this case, each of the second and fourth stages may be composed of a pair of pillars, and may be radially arranged symmetrically with respect to the center of the pillar assembly.

Further, the filler of the third stage among the fillers of the five stages forming the filler aggregate may have a rhombic or rectangular shape in cross section.

On the other hand, the filler of the fifth stage among the fillers of the five stages forming the filler aggregate may have a triangular shape in cross section. In this case, the fifth-stage filler may be disposed such that the cross-section thereof becomes narrower toward the inside in the radial direction toward the rotation axis of the brake band. The cross-sectional area of the fifth-stage filler may be larger than the cross-sectional area of other fillers.

It is another object of the present invention to provide a vehicle comprising a hub coupled to a wheel of a vehicle and a pair of plates extending radially from the hub and parallel to each other and spaced a predetermined distance apart from each other, And a plurality of pillar assemblies each having a plurality of pillar assemblies formed therebetween, the pillar assemblies being spaced from each other by a predetermined angle in the circumferential direction about the pivot axis of the pawl bands, Wherein the first end filler has an airfoil shape in cross section and is arranged such that its cross section is narrowed toward the outside in the radial direction from the rotation axis of the brake band And the pillars of the second stage and the pillars of the fourth stage are each composed of a pair of pillars, And the fifth-stage filler has a triangular cross-section, and the fifth-stage filler has a cross-sectional area that is different from that of the other fillers Sectional area and is arranged such that its cross section is narrowed inward radially toward the rotation axis of the brake band.

According to the brake disk of the present invention having the above-described configuration, at least five stages of pillars are provided between the plates of the brake band, thereby causing a relatively strong air flow between the pillars during braking of the vehicle, thereby improving heat transfer efficiency The heat generated in the brake band can be effectively released.

Further, according to the brake disk of the present invention, at least two or more pillars are disposed symmetrically with respect to each other, so that the brake disk can be mounted irrespective of the rotational direction of the vehicle wheel, so that the mounting time of the brake disk can be reduced, have.

In addition, according to the brake disk of the present invention, the first end filler positioned closest to the rotation axis of the brake band adopts the airfoil shape in which the cross section is narrowed toward the outside, so that during the braking, The inflow of air can be more easily generated through the space between the pillars, and the inflow amount of air can be increased.

Further, according to the brake disk of the present invention, the cross-sectional area of the five-stepped pillar located at the outermost periphery is made larger than the cross-sectional area of the other pillar, so that the natural frequency of the brake disk is increased to prevent the braking force from being weakened or damaged by resonance.

1 is a perspective view of a brake disc according to an embodiment of the present invention,
FIG. 2 is a plan view showing a filler in FIG. 1,
Figures 3 and 4 are enlarged views of a portion of the filler structure of Figure 2,
FIG. 5 is a graph comparing natural frequencies of a brake disk according to an embodiment of the present invention and a brake disk according to the prior art,
6 is a view showing a pillar structure of the brake disk of the prior patent.

Hereinafter, a brake disk according to the present invention will be described in detail with reference to the drawings.

1 is a perspective view of a brake disk 1000 according to an embodiment of the present invention.

Referring to FIG. 1, the brake disk 1000 includes a hub 100 connected to a wheel (not shown) of a vehicle, and a hub 100 extending radially from the hub 100, A plurality of filler assemblies having a pair of plates 310 and 330 disposed parallel to each other with a predetermined distance therebetween and forming a ventilation channel 302 between the pair of plates 310 and 330, and a brake band 300 having a pillar cluster 400 (see FIG. 2).

The hub 100 may have a fastening hole 110 to be coupled to a wheel (not shown) of an automobile. The hub 100 is coupled to the wheel of the automobile and rotates together with the wheel.

The brake band 300 is connected to the hub 100 at a substantially central opening thereof and has a shape radially extending in a radial direction at the hub 100. Since the brake band 300 serves to provide braking force by friction, it can be made of metal having suitable strength, for example, cast iron.

Specifically, the brake band 300 may include a pair of plates 310 and 330 facing each other and spaced apart from each other by a predetermined distance. The plate includes a first plate 310 and a second plate 330 and a plurality of pillar assemblies 400 described later are provided between the first plate 310 and the second plate 330.

The pillar assembly 400 connects the first plate 310 and the second plate 330 to each other and further forms a vent channel 302 between the first plate 310 and the second plate 330 . The air generated in the brake band 300 is effectively discharged to the outside by friction by inducing a flow of air through the ventilation channel 302 when the automobile brakes.

FIG. 2 shows a state in which the first plate 310 is removed from the view of FIG. 1 to show the filler aggregate 400, and the filler aggregate 400 is provided on the second plate 330.

Referring to FIG. 2, the pillar assembly 400 is spaced apart from the pivot axis of the brake band 300 by a predetermined angle in the circumferential direction. In other words, the plurality of pillar assemblies 400 are arranged in the circumferential direction about the rotation axis of the brake band 300.

At this time, in the brake disk 1000 according to the present invention, each of the pillar assemblies 400 includes at least five stages of pillars radially outward from the rotation axis of the brake band 300.

FIG. 3 is an enlarged view of the filler assembly 400 as a partial enlarged view of FIG.

Referring to FIG. 3, the pillar assembly 400 includes at least five stages of pillars radially outward from the rotation axis of the brake band 300. Here, the term " fifth stage " may be defined as the number of pillars disposed radially outward from the rotation axis of the brake band 300. [ The term "first stage", "second stage", "third stage", "fourth stage" and "fifth stage" to be described later refer to the number of stages of the filler, And the fifth stage pillar 450 means a pillar which is located farthest away from the rotation axis of the brake band 300. The pillar 450 is a pillar located nearest to the rotation axis of the brake band 300. [ Therefore, the lower the number of the pillars, the closer to the rotation axis of the brake band 300, and vice versa, the higher the number of the pillars is, the farther away from the rotation axis of the brake band 300.

In the present embodiment, the pillar assembly 400 includes at least five stages of pillars radially outward from the rotation axis of the brake band 300. By adopting a relatively larger number of filler structures than conventional brake discs, a turbulent flow can be generated between the filler structures during braking of the vehicle, resulting in more efficient air flow.

In this case, at least one of the five pillars forming the filler aggregate 400 may have a so-called 'air foil shape' in cross section. The airfoil shape can reduce the flow resistance by smoothly flowing the air therebetween.

For example, in the case of the present embodiment, the first end filler 410 among the five-step fillers forming the filler aggregate 400 may have an airfoil shape in cross section. In this case, the first end pillar 410 may be disposed such that the cross section of the first end pillar 410 is narrowed toward the outside in the radial direction from the rotation axis of the brake band 300, as shown in FIG. When the first end pillar 410 positioned closest to the rotation axis of the brake band 300 has the shape of an airfoil whose cross section is narrowed toward the outside, The inflow of air can be more easily generated through the space between the two-stage pillars 420, and the inflow amount of air can be increased.

On the other hand, in the present embodiment, at least two pillars among the five pillars forming the pillars aggregate 400 may be arranged symmetrically with respect to each other.

For example, among the five pillars forming the filler aggregate 400, the second pillars 420 and the fourth pillars 440 may have an elliptical cross section and may be disposed symmetrically with respect to each other . The second end pillar 420 and the fourth end pillar 440 are each composed of a pair of pillars 420A and 420B and 440A and 440B, Can be arranged symmetrically with respect to each other.

3, the pair of second stage pillars 420A and 420B and the pair of fourth stage pillars 440A and 440B are radially disposed about the substantially central portion of the pillar assembly 400 do.

Accordingly, the first end pillar 410 is disposed at a symmetrical position with respect to the fifth end pillar 450 described later, and the second end pillar 420 and the fourth end pillar 440 are disposed at symmetrical positions . The first end pillar 410 and the fifth end pillar 450 are disposed at mutually symmetrical positions, although their cross sectional shapes are different.

As a result, the filler aggregate 400 has a substantially symmetrical shape centering on the center portion of the second end pillar 420 and the fourth end pillar 440. Such a structure can smoothly induce the flow of air regardless of the direction of rotation of the vehicle wheel during braking. This will be described in detail later.

Meanwhile, among the five pillars constituting the pillar assembly 400, the third pillars 430 are configured such that their cross-sections have a rhombic or rectangular shape. The third stage pillar 430 is disposed between the pair of second stage pillars 420A and 420B and the pair of fourth stage pillars 440A and 440B described above, Similarly, the third stage pillar 430 is disposed between any one pillar assembly 400A and the adjacent pillar assembly 400B.

Of the five pillars forming the pillar assembly 400, the fifth pillars 450 may have a triangular cross section. In this case, the cross-sectional area of the fifth-stage pillar 450 may be larger than the cross-sectional area of the first-stage pillar 410 to the fourth-stage pillar 440. As described above, when the cross-sectional area of the fifth-stage pillar 450 is maximized, the natural frequency of the brake band 300 can be increased, so that the braking force of the brake disc 1000 due to resonance can be reduced, .

The fifth-stage pillar 450 may be disposed such that its cross-section is narrower toward the inside in the radial direction toward the rotation axis of the brake band 300. [ As a result, the amount of air discharged from the brake band 300 can be increased, and the heat transfer efficiency can be improved.

Meanwhile, as shown in FIG. 3, the filler aggregate 400 is disposed at a distance of about 18 degrees in the circumferential direction about the neighboring filler aggregate and the baseline. Herein, the reference line may be defined as a virtual line extending in the radial direction perpendicular to the rotation axis of the brake band 300, and is shown passing through the center of the pillar assembly 400 as shown in FIG.

In this case, the angle of circumferential spacing of the two adjacent pillar assemblies 400 is approximately 18 degrees, so that approximately 20 pillar assemblies 400 are formed along the circumference of the brake band 300, .

4 is a view showing the flow of air passing between the pillar assemblies 400 in the pillar assembly 400 having the above-described structure. The flow of air is divided into a first flow, denoted by reference numeral 500 and a second flow, denoted by reference numeral 510, according to the rotational direction of the car wheel.

Referring to FIG. 4, the first flow 500 or the second flow 510 begins in a space between the first stage filler 410 and the second stage filler 420. In this case, since the first end pillar 410 positioned closest to the rotation axis of the brake band 300 has an airfoil shape whose cross section is narrowed toward the outside, the first end pillar 410, The inflow of air can be more easily generated through the space between the two-stage pillars 420, and the inflow amount of air can be increased.

As described above, by arranging the pair of second stage pillars 420A and 420B and the pair of fourth stage pillars 440A and 440B, the first flow 500 ) Or the second flow 510 is triggered. Accordingly, it is possible to smoothly induce the flow of air inside the filler aggregate 400 regardless of the rotational direction of the automobile wheel. This means that there is no limitation in the direction when connecting the brake disk 1000 according to the present embodiment to the wheels of the vehicle, thereby making it easier to perform the coupling process of the brake disk 1000. [

The first flow 500 or the second flow 510 may be formed between the fifth stage filler 450 and the fourth stage filler 440 or between the fourth stage filler 440 and the third stage filler 430 Through the space between them.

The present inventor has conducted an experiment for comparing the natural frequencies of the brake disk 1000 according to the present embodiment and the brake disk 100 according to the aforementioned prior art.

FIG. 5 is a diagram comparing natural frequencies of a brake disk according to an embodiment of the present invention and a brake disk of the prior art. FIG. 5A is a diagram for explaining the natural frequency of the brake disk according to an embodiment of the present invention, and FIG. 5B is a diagram for identifying the natural frequency of the brake disk of the prior patent.

5A and 5B, the natural frequency of the brake disk 1000 according to the present embodiment is calculated to be approximately 1896 Hz, and the natural frequency of the brake disk 100 of the prior patent is 1823 Hz It can be seen that the natural frequency is increased by about 4% or more. Therefore, it is possible to prevent the braking force from being weakened by resonance or the damage of the brake disc.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. You can do it. It is therefore to be understood that the modified embodiments are included in the technical scope of the present invention if they basically include elements of the claims of the present invention.

100 ... Hub
300 ... brake band
310 ... first plate
330 ... second plate
400 ... filler aggregate
1000 ... brake disc

Claims (10)

A hub connected to the wheels of the vehicle; And
A brake band extending radially from the hub and having a pair of plates facing each other and spaced a predetermined distance apart and having a plurality of pillar assemblies forming a vent channel between the pair of plates; Respectively,
Wherein the plurality of pillar assemblies are spaced from each other by a predetermined angle in a circumferential direction about a rotation axis of the brake band, and each of the pillar assemblies has at least five pillars extending radially outward from the rotation axis of the brake band, Wherein at least two pillars among the five pillars forming the pillar assembly are arranged symmetrically with respect to each other. The method according to claim 1,
Wherein at least one of the pillars of the five stages forming the filler aggregate has an airfoil shape in cross section. 3. The method of claim 2,
Among the five-stage fillers forming the filler aggregate
Wherein the first-stage filler has an airfoil-shaped cross section and is disposed such that its cross-section is narrower in the radial direction from the rotation axis of the brake band toward the outside. The method according to claim 1,
Among the five-stage fillers forming the filler aggregate
Wherein the filler of the second stage and the filler of the fourth stage are formed in an elliptical shape in cross section and arranged symmetrically with respect to each other. 5. The method of claim 4,
Wherein the second and fourth stages each comprise a pair of pillars, and are arranged radially symmetrically with respect to a central portion of the pillar assembly. The method according to claim 1,
Among the five-stage fillers forming the filler aggregate
And the third-stage filler has a rhombic or rectangular cross-section. The method according to claim 1,
Among the five-stage fillers forming the filler aggregate
And the fifth-stage filler has a triangular cross-section. 8. The method of claim 7,
And the fifth-stage filler is arranged so that the cross section thereof becomes narrower toward the inside in the radial direction toward the rotation axis of the brake band. 8. The method of claim 7,
And the cross-sectional area of the fifth-stage filler is larger than the cross-sectional area of the other fillers. A hub connected to the wheels of the vehicle; And
A brake band extending radially from the hub and having a pair of plates facing each other and spaced a predetermined distance apart and having a plurality of pillar assemblies forming a vent channel between the pair of plates; Respectively,
Wherein the pillar assembly is disposed at a predetermined angle in the circumferential direction about the pivot axis of the brake band, and each of the pillar assemblies includes five pillars extending radially outward from the pivot axis of the brake band,
Wherein the first-stage filler has an airfoil-shaped cross section and is disposed such that its cross-section is narrower in the radial direction from the rotation axis of the brake band toward the outside,
The pillars of the second stage and the pillars of the fourth stage are each composed of a pair of pillars, the cross sections of which are formed in an elliptical shape and arranged symmetrically with each other,
The filler of the third stage has a rhombic or rectangular shape in cross section,
The fifth-stage filler has a triangular cross-section, the cross-sectional area of the fifth-stage filler is larger than the cross-sectional area of the other filler, and the cross-section is narrow toward the inside in the radial direction toward the rotation axis of the brake band Wherein the brake discs are disposed so as to be spaced apart from each other.

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