Brake disc structure

A brake disc structure contains: a central disc made of metal material or metal alloy material, a first disc and a second disc which are made of ferrous metal materials, and a through orifice passing through central positions of the first disc, the central disc, and the second disc. The first disc includes a first brake face and plural first holes, the second disc includes a second brake and plural second holes, and the central disc includes plural third holes, wherein each of the plural first and second holes has a first diameter and a second diameter less than the first diameter, and diameters of any two adjacent first and second holes are different. Furthermore, multiple heat dissipation portions of the central disc are defined by the plural third holes and the plural first holes or are defined by the plural third holes and the plural second holes.

FIELD OF THE INVENTION

The present invention relates to a brake disc structure which has light weight, wear resistance, and heat dissipation.

BACKGROUND OF THE INVENTION

A brake disc structure is disclosed in TW Patent No. I312392 and contains a first disc and a second disc, wherein the first disc is made of iron, and the second disc is made of aluminum alloy.

A disk brake rotor is disclosed in U.S. Pat. No. 8,522,931B2 and includes a first rotor portion, a second rotor portion and a third rotor portion. The second rotor portion has an annular portion and at least one ventilation hole. The third rotor portion also has an annular portion. The first portion is attached to and disposed between the second rotor portion and the third rotor portions, such that a surface of the first rotor portion is an exposed area exposed by the at least one ventilation hole. The first rotor portion is made of aluminum or aluminum alloy, and the second and third rotor portions are made of stainless steel. The exposed area of the first rotor portion is not supported by the second and third rotor portions, so the first rotor portion is broken and deformed easily after a period of using time.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide a brake disc structure which has light weight, wear resistance, and heat dissipation

To obtain above-mentioned objective, a brake disc structure provided by the present invention contains: a central disc made of metal material or metal alloy material, a first disc and a second disc which are made of ferrous metal materials, and a through orifice passing through central positions of the first disc, the central disc, and the second disc.

The first disc is connected with a first surface of the central disc, and the second disc is coupled with a second surface of the central disc.

The brake disc structure further contains a through orifice passing through central positions of the first disc, the central disc, and the second disc.

The first disc includes a first brake face away from the first surface of the central disc, and the second disc includes a second brake face away from the second surface of the central disc.

The first disc includes plural first holes, the second disc includes plural second holes, the central disc includes plural third holes, each of the plural first and second holes has a first diameter and a second diameter less than the first diameter, and diameters of any two adjacent first and second holes are different, some of the plural first holes having a larger diameter align with some of the plural second holes having a smaller diameter, and the other of the plural first holes shaving a smaller diameter align with the other the plural second holes having a larger diameter, wherein a diameter of each of the plural third hole is equal to the second diameter of each first hole and each second hole.

Multiple heat dissipation portions of the central disc are defined by the plural third holes of the central disc and the plural first holes of the first disc or are defined by the plural third holes of the central disc and the plural second holes of the second disc.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

With reference toFIGS. 1 and 2, a brake disc structure according to a first embodiment of the present invention comprises: a central disc30made of metal material or metal alloy material, a first disc10and a second disc20which are made of ferrous metal materials, wherein the first disc10is connected with a first surface31of the central disc30, and the second disc20is coupled with a second surface32of the central disc30. Preferably, the first disc10is connected with the first surface31in a metallurgical reaction manner, and the second disc20is coupled with the second surface32in the metallurgical reaction manner. The brake disc structure further comprises a through orifice40passing through central positions of the first disc10, the central disc30, and the second disc20.

The metallurgical reaction manner includes any one of roll forming, press forming, and diffusing forming. A density of the metal material or the metal alloy material is less than 4 g/cm3, and the metal material or the metal alloy material includes any one of magnesium, aluminum, titanium, magnesium alloys, aluminum alloys, and titanium alloys. The ferrous metal materials include cast iron and stainless steel so as to obtain light weight and wear resistance of the brake disc structure.

In the first embodiment, each of the central disc30, the first disc10, and the second disc20is in a circular disk shape, the central disc30includes a first external rim33, the first disc10includes a second external rim13, and the second disc20includes a third external rim23, wherein each of the first, second, and third external rims33,13,23has plural arcuate cutouts41, and the plural arcuate cutouts41of the first external rim33of the central disc30align with the plural arcuate cutouts41of the second external rim13of the first disc10and the plural arcuate cutouts41of the third external rim23of the second disc20.

As shown inFIG. 5, in a second embodiment, each of the central disc30, the first disc10, and the second disc20is in a circular disk shape, and the central disc30includes a first external rim33, the first disc10includes a second external rim13, and the second disc20includes a third external rim23, wherein each of the first, second, and third external rims33,13,23does not has plural arcuate cutouts41of the first embodiment.

The first disc10includes a first brake face11away from the first surface31of the central disc30, and the second disc20includes a second brake face21away from the second surface32of the central disc30(as illustrated inFIG. 4), wherein each of the first brake face11and the second brake face21is configured to contact with a brake lining of a disc brake system, the first brake face11is defined by the second external rim13and a round line C of the first disc10, wherein a center of the round line C of the first disc10is located at a central position of the through orifice40, and the second brake face21is defined by the second external rim23and a round line C of the second disc20, wherein a center of the round line C of the second disc20is located at the central position of the through orifice40. Each of the first and second brake faces11,21has multiple openings42passing therethrough and adjacent to the second external rim13and the third external rim23so that the brake disc structure rotates stably.

Each of the first and second brake faces11,21has multiple apertures43passing therethrough and located adjacent to the two round lines C of the first disc10and the second disc20, wherein the multiple apertures43are defined among the multiple openings42and the through orifice40and are evenly arranged around the through orifice40so that the brake disc structure rotates stably.

The first disc10includes plural first holes14separated from one another and surrounding the through orifice40, wherein any two adjacent of the plural first holes14is defined a first rib15, each of the plural first holes14has a first diameter D1and a second diameter D2less than the first diameter D1, and diameters of any two adjacent first holes14are different.

The second disc20includes plural second holes24separated from one another and surrounding the through orifice40, and a number of the plural second holes24is equal to that of the plural first holes14, wherein any two adjacent of the plural second holes24is defined a second rib25, each of the plural second holes24has the first diameter D1and the second diameter D2less than the first diameter D1, and the diameters of any two adjacent second holes24are different. In addition, centers of the plural first holes14of the first disc10align with centers of the plural second holes24of the second disc20respectively. Some of the plural first holes14having a larger diameter align with some of the plural second holes24having a smaller diameter, and the other of the plural first holes14having a smaller diameter align with the other the plural second holes24having a larger diameter.

The central disc30includes plural third holes34separated from one another and surrounding the through orifice40, and a number of the plural third holes34is equal to that of each of the plural first holes14and the plural second holes24, wherein any two adjacent of the plural third holes24is defined a third rib35, and each of the third holes34aligns with each first hole14and each second hole24. A diameter of each third hole34is equal to the second diameter D2of each first hole14and each second hole24. In addition, each first hole14, each second hole24, and each third hole34are respectively defined by multiple arcuate lines so as to form an irregular shape, and shapes of each first hole14, each second hole24, and each third hole34are identical. Centers of the plural third holes34of the central disc30align with centers of the plural first holes14and the plural second holes24respectively. Each of the multiple openings42, the multiple apertures43, the plural first holes14, the plural second holes24, and the plural third holes34is in any one of a circular shape, a polygonal shape, and an irregular shape. Shapes of the plural first holes14, the plural second holes24, and the plural third holes34are identical, wherein the first rib15, the second rib25, and the third rib35reinforce the first disc10, the second disc20, and the third disc30individually and reduce weights of the first disc10, the second disc20, and the third disc30respectively.

Thereby, multiple heat dissipation portions50of the central disc30are defined by the plural third holes34of the central disc30and the plural first holes14of the first disc10or are defined by the plural third holes34of the central disc30and the plural second holes24of the second disc20(as shown inFIG. 3). The multiple heat dissipation portions50contact with air which flows through the plural first holes14, the plural second holes24, and the plural third holes34so as to quickly remove heat of the brake disc structure by way of the central disc30(because the central disc30is made of the metal material or the metal alloy material).

Preferably, the multiple heat dissipation portions50of the central disc30partially connect with the first disc10and the second disc20so as to avoid deformation and spall as removing the heat of the brake disc structure.

In another embodiment, the central disc30does not include the plural third holes34so as to increase a heat dissipation area as the central disc30aligns with the plural first holes14and the plural second holes24.