The disclosure relates to a mobile crane comprising a superstructure having at least one bearing point for pinning on a boom, wherein the bearing point comprises two spaced apart side parts that each have a bore for receiving the pin; and wherein the boom comprises at least one connection part that is provided with a bore and that can be introduced between the side parts such that a common connection pin can be pushed through the bores of the side parts and the connection part, wherein the clear width between the side parts is larger than the width of the connection part of the boom, and wherein a step pin is provided as a connection pin and its formed shoulder forms an abutment for the connection part of the pinned boom in the pinned position.

A boom system includes a base assembly and a boom assembly. The boom assembly includes a boom including a plurality of boom sections. The plurality of boom sections includes a lower boom section coupled to and extending away from the base assembly and defining a proximal end of the boom and an upper boom section defining a distal end of the boom. The boom assembly further includes an attachment coupler assembly coupled to a boom section other than the upper boom section and configured to receive a first implement. The boom assembly further includes an implement connector positioned at the distal end of the boom, the implement connector configured to receive a second implement.

The invention relates to a tower crane, preferably a rotary tower crane, particularly preferably a top-slewing crane, comprising a jib and a counter-jib. The jib and/or counter-jib is hinged to the tower top and/or rotating platform by means of at least one connection point. A first connection part of the at least one connection point has a concave stop surface, and a second connection part of the connection point comprises a convex counter-stop surface, wherein the counter-stop surface of the second connection part acts on the stop surface of the first connection part by means of a pressure force in order to produce a force-fitting connection between the connection parts.

The invention relates to a tower crane, preferably a rotary tower crane, particularly preferably a top-slewing crane, comprising a jib and a counter-jib. The jib and/or counter-jib is hinged to the tower top and/or rotating platform by means of at least one connection point. A first connection part of the at least one connection point has a concave stop surface, and a second connection part of the connection point comprises a convex counter-stop surface, wherein the counter-stop surface of the second connection part acts on the stop surface of the first connection part by means of a pressure force in order to produce a force-fitting connection between the connection parts.

Provided is an eco-friendly wind power generation apparatus that can perform power generation using wind by providing the blades of a wind power generator on a jib of a tower crane, and can perform wind power generation at the optimum altitude and in the optimum direction by automatically or manually performing the lifting or lowering and swing operation of a jib even when wind speed is insufficient because wind is not blowing, or perform wind power generation using artificial wind power generated by the operation of the jib, thereby generating a lot of electricity in necessary places and supply the electricity to all industrial sectors regardless of location and environment.

Provided is an eco-friendly wind power generation apparatus that can perform power generation using wind by providing the blades of a wind power generator on a jib of a tower crane, and can perform wind power generation at the optimum altitude and in the optimum direction by automatically or manually performing the lifting or lowering and swing operation of a jib even when wind speed is insufficient because wind is not blowing, or perform wind power generation using artificial wind power generated by the operation of the jib, thereby generating a lot of electricity in necessary places and supply the electricity to all industrial sectors regardless of location and environment.

A pivot-forming crane element for a rotating portion of an element-mounted crane includes a framework on which a motor-driven orienting system, a hoisting winch and a dispensing winch are mounted. The motor-driven orienting system includes a pivot mechanism about an orienting axis and at least one orienting electric motor cooperating with the pivot mechanism to make the framework pivot about the orienting axis. The hoisting winch is provided with a hoisting electric motor cooperating with a hoisting drum around which a hoisting rope is wound. The dispensing winch is provided with a dispensing electric motor cooperating with a dispensing drum around which a dispensing rope is wound.

A pivot-forming crane element for a rotating portion of an element-mounted crane includes a framework on which a motor-driven orienting system, a hoisting winch and a dispensing winch are mounted. The motor-driven orienting system includes a pivot mechanism about an orienting axis and at least one orienting electric motor cooperating with the pivot mechanism to make the framework pivot about the orienting axis. The hoisting winch is provided with a hoisting electric motor cooperating with a hoisting drum around which a hoisting rope is wound. The dispensing winch is provided with a dispensing electric motor cooperating with a dispensing drum around which a dispensing rope is wound.

The present disclosure relates to a lattice piece for a lattice boom having four corner bars that are connected to one another by a plurality of posts and diagonals, wherein the lattice piece has a rectangular cross-section having two longer and two shorter sides. A cross-sectional section of the corner bars is designed as a hollow section that has a larger extent in the direction of the longer side of the lattice piece than in the direction of the shorter side of the lattice piece. At least one side of the corner bar section has a stabilization structure in the form of a joint, a kink, a bend, or a rounded portion. The present disclosure further relates to a lattice boom comprising at least one lattice piece in accordance with the present disclosure and to a work machine having such a lattice boom.

The present disclosure relates to a lattice piece for a lattice boom having four corner bars that are connected to one another by a plurality of posts and diagonals, wherein the lattice piece has a rectangular cross-section having two longer and two shorter sides. A cross-sectional section of the corner bars is designed as a hollow section that has a larger extent in the direction of the longer side of the lattice piece than in the direction of the shorter side of the lattice piece. At least one side of the corner bar section has a stabilization structure in the form of a joint, a kink, a bend, or a rounded portion. The present disclosure further relates to a lattice boom comprising at least one lattice piece in accordance with the present disclosure and to a work machine having such a lattice boom.