Patent · US Active

Railroad car wheel truck

US8689701B2 · kind B2 · utility

2Cited by

12References

2Claims

0Family size

Assignee

CSR Yangze Co., Ltd. · CN

Inventors

Mingdao Sun · 红钢城街道, CN
Yong Xu · Brooklyn, US
Baolei Wang · 红钢城街道, CN
Yongjiang LI · 红钢城街道, CN

Key dates

Filing date	Oct 25, 2012
Grant date	Apr 8, 2014
Priority date	—
Expiry date	Oct 25, 2032

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB61F5/122
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A wheel truck, including: a front wheel pair assembly and a rear wheel pair assembly, two side frame assemblies, two spring suspension devices, and a bolster assembly. The spring suspension devices include a bearing spring unit, a damping spring, and a wedge. The wedge includes a primary friction surface and a secondary friction surface. The primary friction surface is attached to a column surface of the side frame assembly. The secondary friction surface is attached to an inclined surface of the bolster assembly. The wedge has the following structure parameters: α=16-30°, and μ<tgα<μ+μ1, in which a represents an included angle between the secondary friction surface and a vertical plane, μ represents a friction coefficient of the primary friction surface, and μ1 represents a friction coefficient of the secondary friction surface.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.