Bogie with orientable axles for railroad vehicles
AssigneeA.N.F. Industrie
InventorPierre Vacher
Life of this patent
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Abstract
The bogie of a railroad vehicle, in particular for city transportation, is provided with axles which can be oriented substantially along the radius of the curves of a railroad track. The primary suspension of the bogie comprises springs and guiding link-arms of variable length constituted by hydraulic jacks for modifying the angle of the axle with respect to the bogie frame according to the radius of the curve being negotiated.
Claims18
A bogie for a railroad vehicle of the type comprising a bogie frame and two axles coupled to the frame by means of resilient primary suspension elements and by means of substantially horizontal link-arms, one end of each link-arm being pivotally attached to the bogie frame and the other end being attached to one axle-box, wherein at least one link-arm of each axle is a variable-length controlled telescopic arm constituted by a double-acting hydraulic jack, one of the jack elements such as the piston or cylinder being coupled to the bogie frame and the other jack element being coupled to the axle-box, wherein said bogie comprises a hydraulic circuit provided with switching means for selectively establishing the supply, draining and isolation of the two jack chambers, wherein said bogie comprises control means which come into action in response to the curves of the track on which the bogie is running, and wherein each hydraulic jack is provided with a releasable locking mechanism for locking said jack in the mean position.
Dependencies are inferred from the claim text.