An excavation tool for making ground excavations for panels and diaphragms includes at least one rotary excavation drum. At least one frame is adapted to support the excavation drum. At least one pump is adapted for suction of an excavation fluid. A brushless electric motor is adapted to put in rotation the at least one excavation drum. At least one mechanical reducer is operationally connected to the electric motor and the at least one excavation drum. The electric motor is installed in the frame and coaxial to the at least one excavation drum. The at least one mechanical reducer is coaxial to the electric motor and the at least one excavation drum. The at least one mechanical reducer is adapted to transfer rotary motion from the electric motor to the at least one excavation drum.

The present invention relates to a special civil engineering machine, in particular a slurry wall cutter, comprising at least one rotating tool and a tool drive that is arranged within a housing of the special civil engineering machine and is sealed with respect to the environment by means of at least one bearing seal in the region of its shaft exit from the housing to the driven tool, characterized in that the bearing seal comprises at least two separate sealing elements, whose arrangement forms a sealing chamber located between the sealing elements, wherein a pressure compensation device is provided, which controls the chamber pressure in the sealing chamber in dependence on the ambient pressure of the special civil engineering machine.

The invention relates to a diaphragm wall cutter for cutting a cutting trench in the ground, comprising a cutting frame, at least one rotatably drivable cutting wheel which is mounted on an lower side of the cutting frame, a suction nozzle, which is arranged in the region of the at least one cutting wheel and is provided with at least one suction opening, and a suction pump which is configured for suctioning slurry from the cutting trench during cutting via the suction nozzle, the suction pump being connected to the suction nozzle via a suction line. According to the invention, it is provided that at least one filling port is provided for filling the suction pump and the suction line with a liquid when the suction line is shut-off, wherein the suction line and the suction pump are filled with liquid for starting the suction pump.

The invention relates to a slurry wall cutter for producing vertical ground trenches, which can be connected to a carrier apparatus, comprising a frame, a motor unit and a drive unit which is releasably connectable with the frame, wherein the drive unit comprises a carrier structure, at least one gear mechanism arranged on the carrier structure as well as a cutting tool for crushing ground material, which connected to the gear mechanism and drivable by the motor unit, wherein the motor unit is releasably connectable to the drive unit and wherein the frame and the drive unit respectively comprise guide means which are configured in such a way that the drive unit can be pushed laterally into and out of the frame.

The invention relates to the field of excavation systems, and more particularly to excavation systems including tools for excavation by electric pulses. An excavation system of the invention comprises a support frame (34), a hydraulic circuit with a pump, and first and second excavation tools. One of said first and second excavation tools is a mechanical excavation tool (1) having a hydraulic actuator and a mounting interface with at least one mechanical fastener member and at least one hydraulic coupling in fluid flow communication with said hydraulic actuator, while the other one of said first and second excavation tools is a tool (1) for excavation by electric pulses, comprising an electricity generator (3) with a rotary shaft for generating electricity from rotation of the rotary shaft, a hydraulic motor coupled to said rotary shaft to drive rotation of the rotary shaft, and an electronic power module (4) electrically connected to the electricity generator (3) in order to be powered by the electricity generator (3) so as to generate electric pulses of instantaneous power that is higher than an instantaneous power of the electricity generator (3), a plurality of electrodes (5a, 5p) including at least one electrode (5a) connected to said electronic power module (4), the electrodes being arranged on said front face, and a mounting interface (14) with at least one mechanical fastener member (22), and at least one hydraulic coupling (20) in fluid flow communication with said hydraulic motor (2). Each of the mounting interfaces of the first and second excavation tools is suitable for releasably mounting the corresponding excavation tool in alternation under the support frame (34) of the excavation system, with the corresponding hydraulic coupling in fluid flow communication with said hydraulic circuit of the excavation assembly.

An implement system for a machine includes a boom housing a drive mechanism for a cutting implement, and having a plurality of oil outlet ports formed therein. A control mechanism is configured to receive data indicative of an expected change in location of the outlet ports relative to an oil fill line within the boom, and vary a pattern of incoming oil flow to limit entrainment of air in the oil.

A hydraulic apparatus for a construction equipment, such as an excavator, comprising a support structure connected or connectable to a movable arm of the construction equipment and a pair or rotating drums comprising a plurality of teeth, a pair of hydraulic motors, each arranged for the movement of a particular drum, and a rotating flow divider device. The flow divider device comprises at least one inlet for receiving a supply of operative fluid provided by the construction equipment and a pair of outlets which provide the operative fluid, which is suitably divided, to the pair of hydraulic motors.

A rotor assembly includes a generally cylindrical rotor having a drive end and a bearing end opposite to the drive end. The rotor is rotatable about a longitudinal axis. The rotor assembly further includes a transmission contained substantially within the rotor at the drive end. The transmission has an input shaft and an output shaft offset from the input shaft. The output shaft is operatively coupled to the rotor and is coaxial with the longitudinal axis of the rotor. The rotor assembly further includes a bearing assembly contained substantially within the rotor at the bearing end. The rotor assembly has a mounting axis and a bearing axis offset from the mounting axis. The bearing assembly further has a rotatable bearing operatively coupled to the rotor and is coaxial with the longitudinal axis of the rotor.

A bucket wheel machine 100 having a base 102 and an operating block 104. The operating block has a bucket wheel 106, a bearing 112,114, and at least one of a ring chute 120, a bucket wheel chute 108, and a bucket wheel drive 116. The operating block 104 is detachably attached to the base of the bucket wheel machine 102. The operating block 104 also has a support frame 130 which is connected to the bearing 112,114.

Hydraulic equipment of the type that can be fixed to a moving arm of an operating machine. The equipment has a support structure connected or connectable to a moving arm of an operating machine, at least one hydraulic motor for the rotation of a working element, a feed pipe connected or connectable to a hydraulic circuit of the supporting operating machine to supply a flow of working fluid to the hydraulic motor, and a drainage unit for the drainage of working fluid from the hydraulic motor. The equipment may optionally include a pressure detector in the drainage unit and a shut-off valve operationally associated with the pressure detector in such a way as to interrupt the flow of working fluid to the hydraulic motor when predetermined pressure conditions are detected.