An attachment is described that is configured for attachment to an arm of a piece of heavy construction equipment. The attachment is configured to rotate a section of pipe during break out (i.e. disconnection or disassembly) from another section of pipe and/or make up (i.e. connection or assembly) with another section of pipe. The attachment is configured to break the joint or torque the joint to a predetermined torque value, unthread or thread pipe, and lift the pipe under the power of the heavy construction equipment.

The invention relates to a method and an arrangement related to a rotator, especially for a work tool supported by an arm, whereby the rotator (10) comprises a stator (20) and a rotor (30). A fastening ring (50) for the attaching of a work tool is separately journalled (D) relative to the stator (20) independently of a bearing (B, C) between the stator (20) and the rotor (30). A driver (80; 180; 280) is used to transfer the rotational movement of the rotor (30) to the fastening ring (50).

An attachment is described that is configured for attachment to an arm of a piece of heavy construction equipment. The attachment is configured to rotate a section of pipe during break out (i.e. disconnection or disassembly) from another section of pipe and/or make up (i.e. connection or assembly) with another section of pipe. The attachment is configured to break the joint or torque the joint to a predetermined torque value, unthread or thread pipe, and lift the pipe under the power of the heavy construction equipment.

Fully rotating rotary actuator of a multi-purpose machine in which an axle supports the frame of a felling head by a bearing mount, there being a rotary mechanism driven by a rotary motor between the axle and the frame, and in which the connection of the axle includes rotatable joints, the axle includes conduits for electrical cables and a processing fluid line, and in which an additive fluid line tube is arranged in the conduit in the axle and connected to its lower end is a rotatable connector, which is connected to a second tube fastened in the frame for the application of the additive fluid.

A power bucket having a first and second bucket half pivotally secured together about a main axis by a pivot pin. The bucket halves are movable between an open and a closed position. A head is disposed above the bucket halves and at least one arm pivotally connects the head to one bucket half while at least one second arm is pivotally connected between the head and the other bucket half. A cylinder support is pivotally mounted to the pivot pin and one end of a hydraulic cylinder is attached to the pivot support. The other end of the cylinder is attached to the bucket. Upon actuation of the cylinders, the cylinders move the bucket halves so that a cutting edge of the bucket half moves in a substantially horizontal plane.

A hydraulic rotational drive for rotating load-handling equipment relative to a crane arm is provided with a shaft, which has first securing means for connecting the shaft to the load-handling equipment or the crane arm, a shaft bearing, which has second securing means for connecting the shaft bearing to the crane arm or the load-handling equipment, vanes arranged in the shaft which can be acted on by oil via an oil feed and an oil discharge for the transmission of a torque to the shaft, wherein the rotational drive has a rotary encoder for the detection of the angular position of the shaft relative to the shaft bearing.

A hydraulic assembly including a pivot connection defining a pivot axis, a hydraulic element linked to the pivot connection, and a connector for connecting a hydraulic conduit to the hydraulic element. The connector defines a connection axis and the connector is configured such that the connection axis approximately intersects the pivot axis. The hydraulic assembly may be used in various applications, including in forestry equipment, for example, with a rotator link assembly.

A hydraulic swivel drive for a grab that has two gripping arms or shells movable like tongs, including two swivel shafts parallel to each other and rotatably mounted in a drive housing, whose shaft ends are connectable with the gripper arms or shells, wherein the swivel shafts each have two oppositely threaded screw engagement portions, with which two pistons movable in opposite directions by means of hydraulic pressure for driving the swivel shafts are in screw engagement. Two differently large and differently contoured cylinder pressure chambers can be assigned to each piston in order to optimally adapt the cross-sectional area of the pistons for each of the reciprocating positioning movements and to appropriately select the pressure conditions. To be able to run in the differently contoured and dimensioned cylinder pressure chambers, each of the pistons is provided with different piston portions which are adapted to the respective cylinder pressure chamber.

A rotation control system may be provided for a material handling machine. The rotation control system may include a boom and a work tool attached to the boom. A swing motor may be capable of swinging the boom and the work tool. A work tool motor may be capable of rotating the work tool relative to the boom. An input device may generate a first signal indicative of a desired swinging of the boom and a second signal indicative of a desired rotation of the work tool. A controller may be in communication with the input device, the swing motor, and the work tool motor. The controller may be capable of actuating the work tool motor based only on the second signal during a first mode of operation and may be capable of actuating the work tool motor based on swinging of the boom during a second mode of operation.

A system (100) comprising a boom tip attachment bracket (108) on a boom (102) of a working machine, the boom (102) having an actuator (104) attached thereto and one or more flexible lines (106), a processing head attachment bracket (110) for rigidly attaching a processing head (112) to the boom (102) of the working machine, the processing head attachment bracket (110) having a line connection point (114) for connecting the one or more flexible lines (106), and an internal line passage (116) for passage of the one or more flexible lines (106) from the boom (102) to the line connection point (114). The boom tip attachment bracket comprises (108) a first rigid frame (118) having at least two plates (120a, 120b) spaced from each other by a first spacing distance (122) so as to comprise at least a portion of the internal line passage (116), and a pair of first coupling points (124a, 124b) opposed across the first spacing distance (122), for rotatably coupling the rigid frame (118) to the processing head (112) along a first rotation axis (126a). The processing head attachment bracket comprises a second rigid frame (128) having at least two plates (130a, 130b) spaced from each other by a second spacing distance (132) so as to comprise at least a portion of the internal line passage (116); and a pair of second coupling points (134a, 134b), opposed across the second spacing distance (132), and rotatably coupled with the pair of first coupling points (124a, 124b) along the first rotation axis (126a). The processing head attachment bracket (110) is coupled to the actuator (104) by a torque assembly (136) for translating actuation of the actuator (104) into a rotation of the processing head attachment bracket (110) about the first rotation axis (126a), and the internal line passage (116) passes through at least the first rotation axis (126a).