The invention relates to an auxiliary tip for detachable mounting on a boom of a work machine, in particular a mobile crane. The auxiliary tip comprises first connecting elements for establishing a first connection with a first boom part, and second connecting elements for establishing a second connection with the first boom part. In order to be able to connect the auxiliary tip to a second boom part having a system dimension different from the first boom part, the auxiliary tip according to the invention comprises third connecting elements with which a second connection to a second boom part can be established instead of the second connecting elements. While the auxiliary tip is connected to the first boom part via the first and second connecting elements, the auxiliary tip can be releasably connected to a second boom part via the third connecting elements.

Provided are a crane capable of improving the workability for lowering and raising a strut, and a method for assembling and disassembling the crane. The crane includes a boom including a boom distal end part, a jib including a jib proximal end part, a strut connected to the boom distal end part or the jib proximal end part and raisable and lowerable by vertically rotationally movement about a strut rotation center; a winch, a winch rope wound and delivered by the winch; and a strut support unit attached to the jib back surface or the strut front surface. The strut support unit supports the strut in a fallen posture at a raisable position above the jib in a boom-and-jib fallen state. In the raisable position, a rope connection part to which the rope is connected in the strut is higher than the strut rotation center.

Provided are a crane capable of improving the workability for lowering and raising a strut, and a method for assembling and disassembling the crane. The crane includes a boom including a boom distal end part, a jib including a jib proximal end part, a strut connected to the boom distal end part or the jib proximal end part and raisable and lowerable by vertically rotationally movement about a strut rotation center; a winch, a winch rope wound and delivered by the winch; and a strut support unit attached to the jib back surface or the strut front surface. The strut support unit supports the strut in a fallen posture at a raisable position above the jib in a boom-and-jib fallen state. In the raisable position, a rope connection part to which the rope is connected in the strut is higher than the strut rotation center.

A photographing system for an ultralow-height counterweight-free vehicle-mounted jib, comprising a base (10), a rotating part, a jib, and a damping part. The rotating part comprises a housing (1) provided above the base (10), a frame (37), counterweight blocks (36), a servo electric cylinder (35), a motor (38), a pinion (40), and a large gear (41). The servo electric cylinder (35) is connected to a rapid abutting structure (2) by means of a clamping member (43). The rapid abutting structure (2) is connected to the jib. The other end of the jib is connected to a gimbal camera mounting plate (6) by means of the damping part. The damping part comprises damping springs (8) and a universal joint structure consisting of a pitch damping rod and left and right swing damping rods. A air spring (34) is provided between the frame (37) and the clamping member (43). One end of the air spring (34) is connected onto the clamping member (43), and the other end of the air spring (34) is connected onto the frame (37). A jib body is driven by the servo electric cylinder to perform a pitch motion, and the weight carried by the front end of the jib body is balanced by the air spring, so that the system is counterweight-free.

A photographing system for an ultralow-height counterweight-free vehicle-mounted jib, comprising a base (10), a rotating part, a jib, and a damping part. The rotating part comprises a housing (1) provided above the base (10), a frame (37), counterweight blocks (36), a servo electric cylinder (35), a motor (38), a pinion (40), and a large gear (41). The servo electric cylinder (35) is connected to a rapid abutting structure (2) by means of a clamping member (43). The rapid abutting structure (2) is connected to the jib. The other end of the jib is connected to a gimbal camera mounting plate (6) by means of the damping part. The damping part comprises damping springs (8) and a universal joint structure consisting of a pitch damping rod and left and right swing damping rods. A air spring (34) is provided between the frame (37) and the clamping member (43). One end of the air spring (34) is connected onto the clamping member (43), and the other end of the air spring (34) is connected onto the frame (37). A jib body is driven by the servo electric cylinder to perform a pitch motion, and the weight carried by the front end of the jib body is balanced by the air spring, so that the system is counterweight-free.

A system for lifting a sub-conductor bundle having a plurality of spaced-apart sub-conductors comprises a single point lifter base and an accessory mounted onto a free end of a support. The support is electrically insulated and comprises one or two tiers of elongate insulators extending away from the base. The base is for mounting the support onto a distal end of a boom. The accessory has at least one wire cage mounted on a cart, the cart mounted on an arcuate track and adapted for free translation along the inner side of the track between first and second ends of the track. The wire cage is in a first orientation when the cart is positioned at the first end of the track, and in a second orientation when the cart is positioned at the second end of the track, the first and second orientations perpendicular to one another.

A system for lifting a sub-conductor bundle having a plurality of spaced-apart sub-conductors comprises a single point lifter base and an accessory mounted onto a free end of a support. The support is electrically insulated and comprises one or two tiers of elongate insulators extending away from the base. The base is for mounting the support onto a distal end of a boom. The accessory has at least one wire cage mounted on a cart, the cart mounted on an arcuate track and adapted for free translation along the inner side of the track between first and second ends of the track. The wire cage is in a first orientation when the cart is positioned at the first end of the track, and in a second orientation when the cart is positioned at the second end of the track, the first and second orientations perpendicular to one another.

An extension yoke, a self-hoisting wind turbine crane with such a yoke, and a method of using such a yoke are disclosed. The yoke comprises a frame structure comprising a lifting portion and a load transfer portion, forming an obtuse angle with each other, and at least one crane attachment element positioned between the load transfer portion and the lifting portion, said at least one crane attachment element being configured for establishing a pivot connection to a crane. The lifting portion comprised a load attachment element and the load transfer portion comprise at least one load transfer element, said load transfer element being configured for transferring compressive force by pressing against a reception surface of the crane and for moving in relation to the reception surface. The frame structure may comprise at least two substantially parallel longitudinal beams, at least one cross-beam, and/or at least one stabilisation element.

The disclosure relates to a deflection device for deflecting a rope, comprising a roller holder, at least one deflection roller mounted on the roller holder so as to be rotatable about a roller axis of rotation, and a rope securing member spaced radially from the deflection roller for securing the rope to the deflection roller. According to the disclosure, the rope securing member is mounted so that it can be displaced along a displacement direction, wherein the deflection device comprises a detection device by means of which a displacement of the rope securing member along the displacement direction can be detected. The disclosure also relates to a working machine, in particular a crane, comprising a deflection device according to the disclosure, wherein the working machine comprises a boom with a boom head which comprises at least one deflection device over which a rope is guided.

The disclosure relates to a deflection device for deflecting a rope, comprising a roller holder, at least one deflection roller mounted on the roller holder so as to be rotatable about a roller axis of rotation, and a rope securing member spaced radially from the deflection roller for securing the rope to the deflection roller. According to the disclosure, the rope securing member is mounted so that it can be displaced along a displacement direction, wherein the deflection device comprises a detection device by means of which a displacement of the rope securing member along the displacement direction can be detected. The disclosure also relates to a working machine, in particular a crane, comprising a deflection device according to the disclosure, wherein the working machine comprises a boom with a boom head which comprises at least one deflection device over which a rope is guided.