Patent ID: 7793594
Filing Date: 2010-09-14
Classification: B61F,B66C

Abstract:
1. A crane comprising: a traveling gear which comprises a plurality of traveling gear groups for moving the crane along rails; each traveling gear group having at least two wheels which are rotatably mounted at a subframe so as to be spaced apart in longitudinal direction of the respective rail; at least one end carriage; a respective traveling gear group being connected to a respective end carriage by a central joint having at least degrees of freedom for rotating the traveling gear group relative to the end carriage around a vertical axis and for swiveling the traveling gear group relative to the end carriage around a horizontal axis extending at right angles to the rails and being constructed in vertical direction as a floating bearing so that only horizontal forces can be transmitted by said central joint; a respective traveling gear group being further connected to a respective end carriage by two connecting rods which are arranged on opposite sides of the central joint viewed in transverse direction of the respective rail and which are connected to the traveling gear group on one side and to the end carriage on the other side by joints lying one above the other; and said joints capable of transmitting compressive forces as well as tensile forces and which have at least degrees of freedom for swiveling the connecting rods relative to the traveling gear group and relative to the end carriage, respectively, around a horizontal axis extending at right angles to the respective rail and around a horizontal axis extending parallel to the respective rail.