US 2022/0144321 A1 · RAILROAD CAR TRUCK DAMPER WEDGE FITTINGS

Abstract

There is a damper wedge for a railroad car truck. It has a removable and replaceable friction element that reciprocates on the wear plate of the side frame column of the railroad car truck. It has a non-metallic wear surface; a spring seat that, in use, engages a spring of the railroad car truck; and an inclined damper wedge surface having a primary angle, alpha, and a secondary angle, beta. The inclined damper wedge surface has a curvature. The curvature has a working point. The working point is located in a central region of a contact patch, or working surface patch. The nonmetallic wear surface material is mounted to a carrier that mounts removably to the damper wedge body. The carrier has fingers that span the wedge and that transfer shear and resist torsion, the fingers preventing the non-metallic member from migrating out of position.

Claims40

Dependent claims

A friction wear assembly removably mounted to a friction damper wedge body that seats in a bolster pocket of a truck bolster of a railroad car truck, and, that in use forms the face that slides against a side frame column wear plate, wherein said friction wear assembly comprises:

a carrier and a friction element secured to said carrier;
said carrier being formed of a plate having a first face and a second face, said first face being opposed to said second face, said first face defining a datum surface;
said friction element is mounted to said first face of said carrier, and lies forwardly of said datum surface, said friction element having a set of mechanical interlinks that mate with corresponding mechanical interlinks of said carrier rearwardly of said datum surface;
said second face of said plate defining a force transfer interface that, in use, abuts the friction damper wedge body;
said plate having first and second side margins;
said plate having first and second fingers formed to extend rearwardly from said first and second side margins respectively;
and
said fingers defining shear force and moment couple transfer interfaces.

5 more elements

Dependencies are inferred from the claim text.

Railroad car truck damper wedge fittings

Life of this patent

Railroad car truck damper wedge fittings

Life of this patent

Abstract

Claims40