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Railway wheel

A wheel and track technology, applied in the field of tread brake wheels, can solve the problems of not being able to assemble a bogie and not meeting performance requirements, etc.

Active Publication Date: 2011-11-09
LUCCHINI RS S P A LOVERE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of these designs do not meet current performance needs and cannot be fitted to existing bogies due to their geometry

Method used

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Experimental program
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Embodiment Construction

[0018] As shown, the wheel comprises a hub 1 having a running surface or tread 3 and a flange 4 inside it, a rim 2 and spokes or intermediate discs 5 connected to the hub and rim.

[0019] X-X designates the geometric and rotational axis of the wheel, while S designates the radial median plane of the wheel perpendicular to the X-X axis.

[0020] The cross-section of the spoke 5 extends along the central curve AB and has a curvilinear shape between a point A in the zone 6 which connects the spoke to the radially inner surface of the rim 2 and a point B in the zone 7 which makes it The spokes are connected to the radially outer surface of the hub 1 .

[0021] More specifically, the spokes 5 have a curved middle portion extending along a central curve AB between two points of inflection D, E on opposite parts of the middle point C, and having a center of curvature on one side of the wheel (soffit [intrados]), the spoke 5 also has a first end portion located between point D and t...

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PUM

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Abstract

The invention concerns a railway wheel with a mid-plane (S) perpendicular to the rotation axis, and a web (5) which extends along a central curvilinear line (AB) between a junction point (A) to the rim and a junction point (B) to the hub of the wheel. The web has an intermediate point (C) and two inflection points (D, E) between the intermediate point (C) and, respectively, the junction points (A and B). The two junction points (A and B) are located from the same part of the mid-plane (S) of the wheel, the intermediate point (C) of the web has a tangent to the central line (AB) that is parallel to the mid-plane (S) and is on the opposite side of said median plane (S), and the angle between the tangents to the central line (AB) of the web in the inflection points (D and E) is between 90 and 120 degrees.

Description

technical field [0001] The invention relates to a freight rail wheel, in particular a tread braked wheel, comprising a wheel for which tread braking is provided in addition to a main braking system. The invention proposes a wheel design with a high ability to keep induced stresses and deflections sufficiently low during and after braking operations. The wheel is especially suitable for heavy axle load freight services, but is also suitable for special applications on passenger trains. Background technique [0002] Even though so-called tire wheels with separate rims (tyres) have been used, to this day railway vehicle wheels are mainly manufactured in one piece by forging or casting, known as enbloc or one-piece wheels. In this case only integral wheels are considered. A modern passenger car or freight car wheel set consists of two solid steel wheels rigidly mounted on a conventional steel axle. [0003] Forged steel wheels are rolled to the required dimensions and often s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60B17/00
CPCB60B17/0068B60B17/0006
Inventor F·隆巴尔多R·伦登L·努德哈尔
Owner LUCCHINI RS S P A LOVERE