Current collector for transmitting energy between a contact wire and a motor coach
AssigneeDeutsche Forschungsanstalt fur Luft- und Raumfahrt e.V.
InventorsElmar Breitbach, Andreas Buter
Life of this patent
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Abstract
A current collector for transmitting energy between a contact wire and a motor coach having at least one collector shoe (1) and at least one suspension spring (16) with a positive stiffness, the suspension spring supporting the collector shoe which lies with a contact force from below and against the contact wire. The suspension spring (16) is arranged in parallel with a correction spring (17), the correction spring having a negative stiffness in a zero-crossing of its spring characteristic curve, which coincides with the spring travel of the suspension spring (16), which spring travel corresponds to the desired contact force.
Claims13
A current collector for transmitting energy between a contact wire and a motor coach, the current collector being mounted on the motor coach, said current collector comprising:
- at least one collector shoe,
- at least one suspension spring, said suspension spring having a positive stiffness and a spring travel, and being constructed and arranged to support the at least one collector shoe with a contact force exerted by said at least one suspension spring against and from below the contact wire, and
- at least one correction spring, said correction spring being spaced from and parallel to said at least one suspension spring, the at least one correction spring having a spring characteristic curve and a negative stiffness in a zero-crossing of said spring characteristic curve,
- wherein the zero-crossing of the at least one correction spring coincides with the spring travel of the at least one suspension spring, which spring travel corresponds to the desired contact force of the collector shoe against the contact wire.
Dependencies are inferred from the claim text.