Suspension for a rail vehicle
AssigneeSCT Europe Limited
InventorWilliam Alan Aitken
Life of this patent
Estimating the term…
Abstract
A suspension for a rail vehicle includes a bogie pedestal 10, an axle box 11 and suspension springs 16, 18 and 19 arranged such that the axle box supports load exerted on the pedestal via the springs. The suspension includes a pair of wedge elements 20 urged, by means of springs 18 and 19, into engagement with faces 30 of the pedestal and faces 21 of the axle box. This engagement causes damping of axle box movements. Wedge elements 20 are urged resiliently in opposing directions A and B into frictional slidable contact at the faces 21 by means of additional preset springs 40 mounted at the pedestal 11. This further urging is independent of the load carried by the springs and provides improved suspension characteristics.
Claims7
A suspension for a rail vehicle comprising:
- a bogie pedestal;
- an axle box having a friction face;
- a support for supporting the pedestal on the axle box, the support including a resilient portion;
- and a wedge element mounted on the resilient portion for action between that portion and the pedestal and for engaging the friction face when under load, wherein the support further includes a preset spring for urging the wedge element into contact with the friction face independent of any load carried by the support, and that the preset spring urges in a direction parallel to the direction of intended travel of the bogie.
A suspension for a rail vehicle comprising:
- a bogie pedestal including a pair of faces;
- an axle box including a pair of damping faces;
- a pair of wedge elements each acting between the pedestal and the axle box;
- at least two support springs;
- and,
- a pair of preset springs;
- the at least two support springs supporting, on the axle box, at least some of the rail vehicle load exerted on the pedestal and forcing the wedge elements into engagement with the faces of the pedestal and the damping faces of the axle box as a result of the load, wherein the wedge elements are resiliently urged into contact with the friction faces of the axle box independent of the load, and in a direction parallel to the direction of intended travel of the bogie.
Dependencies are inferred from the claim text.