Drive system for a pantograph, and method for raising or lowering
AssigneeSchunk Transit Systems GmbH
InventorAlexander Gruber
Life of this patent
Estimating the term…
Abstract
A drive system for raising or lowering a sliding piece of a current collector for rail vehicles. The sliding piece is disposed on a positioning device of the current collector, and the sliding piece is configured to be brought into contact with an overhead line using contact pressure. The drive system includes a bellows drive which is actuated by compressed air to actuate the positioning device, and a pneumatic control unit having a control valve for supplying or withdrawing compressed air to/from the bellows drive. The drive system includes a detection line and a lowering valve for venting the bellows drive when pressure drops in the detection line, the lowering valve being a 3/2-way valve disposed in a pneumatic supply line between the control valve and the bellows drive.
Claims15
A drive system for raising or lowering at least one sliding piece of a current collector for rail vehicles, the sliding piece being disposed on a positioning device of the current collector, said positioning device being adjustable by the drive system, and the sliding piece being configured to be brought into contact with an overhead line using a contact pressure, the drive system comprising a bellows drive which is configured to be actuated by means of compressed air for actuating the positioning device, the drive system comprising a pneumatic control unit having a control valve for supplying or withdrawing compressed air to/from the bellows drive, and the drive system comprising a lowering unit having a pneumatic detection line and a lowering valve for venting the bellows drive when pressure drops in the detection line,
- wherein
- the lowering valve is a 3/2-way valve, the lowering valve being disposed in a pneumatic supply line between the control valve and the bellows drive, and wherein the detection line is connected to a second pneumatic supply line of the control unit for forming the operating pressure in the detection line, a throttle valve of the lowering unit being disposed in the second supply line.
A method for raising or lowering at least one sliding piece of a current collector for rail vehicles with a drive system, the sliding piece being disposed on a positioning device of the current collector, said positioning device being adjustable by the drive system, and the sliding piece being brought into contact with an overhead line using a contact pressure, a bellows drive of the drive system actuating the positioning device by means of compressed air, compressed air being supplied to or withdrawn from the bellows drive by means of a control valve of a pneumatic control unit of the drive system, and a pneumatic detection line and a lowering valve of a lowering unit of the drive system venting the bellows drive when pressure drops in the detection line,
- wherein
- a 3/2-way valve with spring return is used as a lowering valve, the lowering valve being disposed in a pneumatic supply line between the control valve and the bellows drive, and wherein the detection line is connected to a second pneumatic supply line of the control unit for forming the operating pressure in the detection line, a throttle valve of the lowering unit being disposed in the second supply line.
Dependencies are inferred from the claim text.