Disc brake device

Patent metadata

Field	Value
Publication number	US-2025035172-A1
Application number	US-202218716213-A
Country	US
Kind code	A1
Filing date	Oct 31, 2022
Priority date	Dec 28, 2021
Publication date	Jan 30, 2025
Grant date	—

Abstract

A disc brake device includes a rotary member, a brake disc, and an airflow-rate restriction member. The brake disc includes a disc body and a plurality of fins. The airflow-rate restriction member includes a base plate and a protruding portion. The base plate is sandwiched between the rotary member and the fins. The protruding portion is arranged inward in the radial direction of the disc body with respect to the fins. The protruding portion protrudes from the base plate toward a disc body side. The protruding portion extends in the circumferential direction of the disc body.

First claim

1 . A disc brake device for a railway vehicle, the disc brake device comprising:
a rotary member attached to an axle of the railway vehicle; a brake disc including an annular disc body having a back surface that faces the rotary member and a plurality of fins arranged in a radial formation on the back surface, the fins each extending in a radial direction of the disc body; and an airflow-rate restriction member for restricting airflow rate between the rotary member and the disc body, wherein the airflow-rate restriction member includes: a base plate sandwiched between the rotary member and the fins; and a protruding portion arranged inward in the radial direction with respect to the fins, the protruding portion protruding from the base plate toward a disc body side, the protruding portion extending in a circumferential direction of the disc body.

2 . The disc brake device according to claim 1 , wherein
the protruding portion includes a curved surface arranged in a portion of a surface of the protruding portion on a brake disc side, the curved surface having an arc-shape that is convex outward of the protruding portion when the disc brake device is viewed in section that includes a central axis of the disc body.

3 . The disc brake device according to claim 2 , wherein
the curved surface has a radius of curvature of 10 mm or more.

4 . The disc brake device according to claim 1 , wherein
a protruding height of the protruding portion is no more than a height of the fins, and a length of a clearance between the protruding portion and the fins along the radial direction is less than 10 mm.

5 . The disc brake device according to claim 1 , wherein
a protruding height of the protruding portion is larger than a height of the fins, and a length of a clearance between the protruding portion and the disc body along the radial direction is less than 10 mm.

6 . The disc brake device according to claim 2 , wherein
a protruding height of the protruding portion is no more than a height of the fins, and a length of a clearance between the protruding portion and the fins along the radial direction is less than 10 mm.

7 . The disc brake device according to claim 3 , wherein
a protruding height of the protruding portion is no more than a height of the fins, and a length of a clearance between the protruding portion and the fins along the radial direction is less than 10 mm.

8 . The disc brake device according to claim 2 , wherein
a protruding height of the protruding portion is larger than a height of the fins, and a length of a clearance between the protruding portion and the disc body along the radial direction is less than 10 mm.

9 . The disc brake device according to claim 3 , wherein
a protruding height of the protruding portion is larger than a height of the fins, and a length of a clearance between the protruding portion and the disc body along the radial direction is less than 10 mm.

Assignees

• Nippon Steel Corp

Inventors

• Uenishi Ayumi
• Fujimoto Takahiro
• Nogami Hiroshi
• Okamoto Mitsuhiro
• Miyabe Naruo
• Ichikawa Yuki
• Kato Takanori
• Nishimura Ryuichi
• Shiotani Yuiko

Classifications

• F16D65/124

  adapted for mounting on the wheel of a railway vehicle · CPC title

• F16D65/128

  characterised by means for cooling · CPC title

• F16D65/0006 Primary

  Noise or vibration control · CPC title

• F16D65/847

  with open cooling system, e.g. cooled by air · CPC title

• B61H5/00 Primary

  Applications or arrangements of brakes with substantially radial braking surfaces pressed together in axial direction, e.g. disc brakes · CPC title