Brake disc

Patent metadata

Field	Value
Publication number	US-11118643-B2
Application number	US-201916676313-A
Country	US
Kind code	B2
Filing date	Nov 6, 2019
Priority date	Dec 12, 2018
Publication date	Sep 14, 2021
Grant date	Sep 14, 2021

Abstract

A brake disc, in which a hat part that is mounted on a hub and a disc part that provides friction surfaces with brake pads are made of different materials and are combined, includes: a plurality of bridges protruding and circumferentially arranged around an edge of the hat part for coupling to the disc part; a plurality of vanes defining a channel for air flow; and a plurality of coupling pillars, which are fixedly in contact with the bridges, respectively, arranged between a pair of disc plates. The coupling pillars are fixedly in contact with both sides of the bridges while exposing front ends of the bridges.

First claim

What is claimed is:

1. A brake disc, in which a hat part that is mounted on a hub and a disc part that provides friction surfaces with brake pads are made of different materials and are combined, comprises:
a plurality of bridges protruding and circumferentially arranged around an edge of the hat part for coupling to the disc part;
a plurality of vanes, which defines a channel for air flow, arranged between a pair of disc plates; and
a plurality of coupling pillars, which are fixedly in contact with the plurality of bridges, respectively, arranged between the pair of disc plates,
wherein the plurality of coupling pillars are fixedly in contact with both sides of the plurality of bridges while exposing front ends of the plurality of bridges,
wherein joint surfaces, of the front ends of the plurality of bridges and front ends of the plurality of coupling pillars, are curved,
wherein a radius of curvature of each of the joint surfaces of the front ends of the plurality of bridges and the front ends of the plurality of coupling pillars is 2.0R-3.0R, and
wherein a yield strength of the brake disc is 250 MPa or less.

2. The brake disc of claim 1 , wherein the plurality of vanes are straight vanes circumferentially spaced apart from each other between the pair of disc plates.

3. The brake disc of claim 2 , wherein the plurality of coupling pillars are disposed in straight lines with vanes selected from the straight vanes.

4. The brake disc of claim 2 , wherein the plurality of vanes include:
a plurality of first vanes disposed in a front area of the bridges and the coupling pillars; and
a plurality of second vanes disposed in areas between sets of the bridges and the coupling pillars, and
the plurality of first vanes have lengths shorter than lengths of the plurality of second vanes to define the channel for the air flow between the plurality of first vanes and the front ends of the plurality of bridges.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp
• Seohan Ind Co Ltd
• Hyundai Sungwoo Casting Co Ltd

Inventors

• Rhee Yoon Joo
• Lee Jae Young
• Kim Yoon Cheol
• Lee Byung Chan
• Han Jin
• Chung Min Gyun
• Shin Jeong Ho
• Lee Jae Seok

Classifications

• F16D2065/1328

  internal cavities, e.g. cooling channels · CPC title

• F16D2250/0007

  Casting · CPC title

• F16D65/123 Primary

  comprising an annular disc secured to a hub member; Discs characterised by means for mounting · CPC title

• F16D2200/0013

  Cast iron · CPC title

• F16D65/128 Primary

  characterised by means for cooling · CPC title