The present disclosure discloses a crane, including: a chassis; a rotatable platform, rotatably arranged on the chassis; a main arm, including a first end hinged with a first end of the rotatable platform, and a second end for lifting a weight; a mast, configured to luff the main arm, wherein a first end of the mask is hinged with the first end of the rotatable platform, and a second end of the mast is connected to the second end of the main arm and a second end of the rotatable platform; and a first independent counterweight system, including a first independent counterweight, and a connecting structure connected between the first independent counterweight and the rotatable platform, wherein the connecting structure is configured to enable the first independent counterweight to be in a partial working state, and in the partial working state, the first independent counterweight is supported on the ground and the weight of the first independent counterweight is supported jointly by the ground and the rotatable platform.

The present disclosure discloses a crane, including: a chassis; a rotatable platform, rotatably arranged on the chassis; a main arm, including a first end hinged with a first end of the rotatable platform, and a second end for lifting a weight; a mast, configured to luff the main arm, wherein a first end of the mask is hinged with the first end of the rotatable platform, and a second end of the mast is connected to the second end of the main arm and a second end of the rotatable platform; and a first independent counterweight system, including a first independent counterweight, and a connecting structure connected between the first independent counterweight and the rotatable platform, wherein the connecting structure is configured to enable the first independent counterweight to be in a partial working state, and in the partial working state, the first independent counterweight is supported on the ground and the weight of the first independent counterweight is supported jointly by the ground and the rotatable platform.

A wheeled crane and self-demounting and self-mounting methods for supporting legs thereof is disclosed. The wheeled crane includes a vehicle frame and auxiliary supports, and the auxiliary supports can enable the vehicle frame to keep balance. Since the wheeled crane has auxiliary supports, when the supporting legs are demounted or mounted, the auxiliary supports function as supporting legs, so that the supporting legs can be mounted and demounted by the operation part of the wheeled crane with no need of using an auxiliary crane, and thus the self-mounting and self-demounting of the supporting legs of the wheeled crane are realized.

An electric winch device causes an operative part to perform an operation for hoisting work by winding up or letting out a rope connected to the operative part, the electric winch device including: a winch drum having an axis, provided on the mobile crane to be rotatable about the axis and wound with the rope therearound; a plurality of motors located on one side of the winch drum in an axial direction in which the axis of the winch drum extends, and arranged side by side in a direction perpendicular to the axial direction; a gear mechanism which combines torques output from the plurality of motors; and a transmitting part which transmits a resultant of torques combined by the gear mechanism to the winch drum to rotate the winch drum to thereby cause the winch drum to wind up or let out the rope.

This invention relates to a mobile crane with a traveling undercarriage and an uppercarriage rotatably mounted on the same, to which on the one hand a boom is luffably articulated and on which on the other hand a counterweight assembly is arranged on the uppercarriage, in which a counterweight plate is connectable via a counterweight receptacle, in that the same is pivotable from a pick-up position into a deposited position about at least one bolt arranged on the counterweight receptacle. According to the invention, at least one further bolt is arranged on the counterweight receptacle parallel to the at least one bolt, which while swinging down the counterweight plate engages into a corresponding curve-shaped recess of the counterweight plate for securing the same.

This invention relates to a mobile crane with a traveling undercarriage and an uppercarriage rotatably mounted on the same, to which on the one hand a boom is luffably articulated and on which on the other hand a counterweight assembly is arranged on the uppercarriage, in which a counterweight plate is connectable via a counterweight receptacle, in that the same is pivotable from a pick-up position into a deposited position about at least one bolt arranged on the counterweight receptacle. According to the invention, at least one further bolt is arranged on the counterweight receptacle parallel to the at least one bolt, which while swinging down the counterweight plate engages into a corresponding curve-shaped recess of the counterweight plate for securing the same.

The invention relates to a drive device for supplying power to multiple engine pumps (4, 5), provided in the superstructure (3) of a mobile crane for superstructure functions, by way of a drive motor (2) arranged in the undercarriage (1) of the mobile crane, comprising a hydraulic motor (7) which is arranged in the superstructure (3) and hydraulically driven by the drive motor (2) and which comprises a first mechanical output which couples at least one first engine pump (4) to the hydraulic motor (7) and a second mechanical output which couples at least one second engine pump (5) to the hydraulic motor (7). The invention also relates to a mobile crane comprising this drive device.

A vehicle crane comprising a jib that is raised and lowered by at least one main tensile connector, and a counter jib, where the main tensile connector extends between a first connecting point in the region of a jib head and a second connecting point in the region of a counter jib head. To reduce loading on the jib, in particular during raising and lowering and increase its bearing load overall, the jib has a third connecting point between the first connecting point and its foot opposite the head, and a secondary tensile connector extends between the third connecting point and a fourth connecting point in the region of the head of the counter jib, or the secondary tensile connector extends between the third connecting point via a seventh connecting point on the main tensile connector and a fourth connecting point in the region of the main jib foot.

A vehicle crane comprising a jib that is raised and lowered by at least one main tensile connector, and a counter jib, where the main tensile connector extends between a first connecting point in the region of a jib head and a second connecting point in the region of a counter jib head. To reduce loading on the jib, in particular during raising and lowering and increase its bearing load overall, the jib has a third connecting point between the first connecting point and its foot opposite the head, and a secondary tensile connector extends between the third connecting point and a fourth connecting point in the region of the head of the counter jib, or the secondary tensile connector extends between the third connecting point via a seventh connecting point on the main tensile connector and a fourth connecting point in the region of the main jib foot.

A base assembly for a working machine. The base assembly comprising a ground engaging structure, an undercarriage connected to the ground engaging structure, and a connector for connecting the undercarriage to a superstructure that mounts a working arm. A drive arrangement is provided for moving the ground engaging structure to propel, in use, the base assembly and a connected superstructure. The drive arrangement includes a prime mover and a transmission and the drive arrangement is housed within the undercarriage. An electronic control unit (ECU) is provided for controlling the drive arrangement and/or the ground engaging structure.