PURPOSE: A crane trolley is provided to reduce the entire weight of a crane, to improve the productivity of an assembling and to induce the standard production by simplifying and lightening the structure of the crane trolley. CONSTITUTION: A pair of traveling frames has wheels. An interval maintenance beam maintains an interval of the traveling frames by installing between the traveling frames. A first driving motor is installed on the traveling frames. A first decelerator is connected with the first driving motor. The first decelerator decelerates the speed of rotary power by the first driving motor. A first drum is rotated by connecting with the first decelerator. A first wire rope(154) is rolled in the first drum. A pulley frame(170) is installed on the traveling frames. Many first pulleys(174) are installed under the pulley frame to be rotatable. Thereby, a girder is lightened by simplifying the structure and reducing the weight.
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