A pantograph device of a trolley truck comprises: a base frame (6); a lower frame (8) swingably mounted on the base frame; an upper frame (10) swingably mounted near the tip of the lower frame via a connection shaft (9); a collector head (5) swingably supported near the tip of the upper frame; an oil pressure cylinder (14) which is mounted on the base frame to raise and lower the lower frame; and a spring (15) which has one end connected to the base frame and the other end connected to the base end of the upper frame to rotate the upper frame upward via the connection shaft. The pantograph device is configured to rotate the upper frame upward via the connection shaft by increasing the tensile force created in the spring in response to the oil pressure cylinder raising the lower frame. Thereby, it is possible to extend the range of motion without using a long and strong spring, and to improve the tracking to the overhead line without increasing a pressing force.


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    Title :

    Pantograph device of trolley truck


    Contributors:

    Publication date :

    2015-04-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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