Wheel for railway vehicle

Patent metadata

Field	Value
Publication number	US-12454148-B2
Application number	US-202118004916-A
Country	US
Kind code	B2
Filing date	Oct 12, 2021
Priority date	Oct 27, 2020
Publication date	Oct 28, 2025
Grant date	Oct 28, 2025

Abstract

A wheel includes a boss, a rim, and a web. The rim includes a tread and a flange. A center of the rim in the axial direction of the wheel is disposed closer to the flange in the axial direction than a center of the boss in the axial direction is. The web has a plate-thickness center line that has a linear shape when the wheel is viewed in its longitudinal section. When an angle that the plate-thickness center line forms with the axial direction is denoted by a, a distance in the axial direction from a side face of the rim to an outer end of the plate-thickness center line is denoted by Pw, a length of the rim in the axial direction is denoted by Wr, and Pw/Wr is denoted by L, the wheel satisfies the expression L≥0.0223α−1.363. Where, the angle α is 90° or less.

First claim

The invention claimed is:

1 . A wheel to be used in a railway vehicle, the wheel comprising:
a boss that forms an inner circumferential portion of the wheel and into which an axle of the railway vehicle is to be inserted; a rim that forms an outer circumferential portion of the wheel and includes a tread to come into contact with a top surface of a rail on which the railway vehicle travels and a flange protruding outward from the tread in a radial direction of the wheel; and a web that has an annular shape and connects the boss and the rim, wherein a center of the rim in an axial direction that is a direction in which a central axis of the wheel extends is disposed closer to the flange in the axial direction than a center of the boss in the axial direction is, the web has a plate-thickness center line having a linear shape when the wheel is viewed in a longitudinal section, when an angle that the plate-thickness center line forms with the axial direction is denoted by a, the angle being defined as being 90° in a case where the plate-thickness center line is parallel to the radial direction, and as being less than 90° in a case where the plate-thickness center line is inclined with respect to the radial direction by rotating to an opposite side to the flange around an inner end in the radial direction of the plate-thickness center line from a position of 90°, and when a distance in the axial direction from a side face on an opposite side to the flange among both side faces in the axial direction of the rim to an outer end in the radial direction of the plate-thickness center line is denoted by Pw, a length of the rim in the axial direction is denoted by Wr, and Pw/Wr is denoted by L, the wheel satisfies Formula (1) below:
L≥ 0.0223α−1.363  (1)

where, the angle α is 90° or less.

2 . The wheel according to claim 1 , wherein the angle α is 87° or less.

3 . The wheel according to claim 1 , wherein the web has a plate thickness that decreases as the web extends outward in the radial direction until a point inward from the outer end of the plate-thickness center line and has a minimum plate thickness at the point.

4 . The wheel according to claim 2 , wherein the web has a plate thickness that decreases as the web extends outward in the radial direction until a point inward from the outer end of the plate-thickness center line and has a minimum plate thickness at the point.

Assignees

• Nippon Steel Corp

Inventors

• Kato Takanori
• Yamamura Yoshinari
• Abe Shingo
• Noguchi Jun
• Kozuka Chihiro

Classifications

• B60Y2200/30

  Railway vehicles · CPC title

• B60B2900/311

  Rigidity or stiffness · CPC title

• B60B17/0068

  the flange being provided on a single side · CPC title

• B60B3/007

  in the intermediate section · CPC title

• B60B17/0006 Primary

  Construction of wheel bodies, e.g. disc wheels (B60B17/0003 takes precedence) · CPC title