A system for automated dynamic compaction includes a compaction crane having a boom and compaction weight, at least one positional sensor, at least one boom deflection sensor, a rotational encoder, and a compaction control system. The compaction control system may be programmed to identify a first drop location having a first target parameter, determine whether the compaction crane is positioned over the first drop location, determine an initial elevation of the compaction weight, lift the compaction weight to a drop height, detect that the compaction weight has been released, re-hoist the compaction weight to the drop height, measure the payout length of a winch cable after each drop, determine a current elevation of the compaction weight after each drop, and determine whether the first target parameter has been satisfied.

A piece of heavy construction or forestry equipment includes an internal combustion engine configured to generate power from combustion of fuel, a winch coupled to the internal combustion engine such that power generated by the internal combustion engine is transmitted to the winch by a non-mechanical connection, a first electronic control unit, wherein the first electronic control unit is configured to control operation of components of the piece of heavy construction equipment other than the winch, and a second electronic control unit, wherein the second electronic control unit is independent of the first electronic control unit and configured to control operation of the winch.

A piece of heavy construction or forestry equipment includes an internal combustion engine configured to generate power from combustion of fuel, a winch coupled to the internal combustion engine such that power generated by the internal combustion engine is transmitted to the winch by a non-mechanical connection, a first electronic control unit, wherein the first electronic control unit is configured to control operation of components of the piece of heavy construction equipment other than the winch, and a second electronic control unit, wherein the second electronic control unit is independent of the first electronic control unit and configured to control operation of the winch.

The present application relates to a switching valve, a switching hydraulic system, and a crane, in which the switching valve having an oil inlet and an oil outlet comprises at least two pairs of valve oil ports, a pair of cartridge valves provided between each pair of valve oil ports, and the oil inlet and the oil outlet are controlled such that the oil inlet and the oil outlet are capable of shifting between communications with the at least two pairs of valve oil ports. The switching valve switches on and off communication between the oil inlet and the oil outlet and the at least two pairs of valve oil ports by controlling opening or closing of the cartridge valves.

The present application relates to a switching valve, a switching hydraulic system, and a crane, in which the switching valve having an oil inlet and an oil outlet comprises at least two pairs of valve oil ports, a pair of cartridge valves provided between each pair of valve oil ports, and the oil inlet and the oil outlet are controlled such that the oil inlet and the oil outlet are capable of shifting between communications with the at least two pairs of valve oil ports. The switching valve switches on and off communication between the oil inlet and the oil outlet and the at least two pairs of valve oil ports by controlling opening or closing of the cartridge valves.

A method for regulating the speed of a clamping and lifting device (1) with at least one guide cylinder (2). A hydraulic fluid can flow in and out through in each case one opening in at least two cylinder chambers of the at least one guide cylinder (2) via at least one pump device and via at least one valve device per cylinder chamber for lifting and lowering loads (16). The degree of opening of the valve of the at least one valve device in each case can be changed as a function of the working direction of the device (1), a setpoint speed (10) and the current speed (11) of the at least one guide cylinder (2).

A method for regulating the speed of a clamping and lifting device (1) with at least one guide cylinder (2). A hydraulic fluid can flow in and out through in each case one opening in at least two cylinder chambers of the at least one guide cylinder (2) via at least one pump device and via at least one valve device per cylinder chamber for lifting and lowering loads (16). The degree of opening of the valve of the at least one valve device in each case can be changed as a function of the working direction of the device (1), a setpoint speed (10) and the current speed (11) of the at least one guide cylinder (2).

A winch assembly is disclosed. The winch assembly may have a support with parallel plates spaced apart from each other. The winch assembly may also have a drum with a hollow spool between the parallel plates, and a shaft passing axially through and being connected to the hollow spool. The winch assembly may further have a motor directly connected to an end of the shaft, and a fail-safe-brake directly connected to an end of the shaft.

A winch assembly is disclosed. The winch assembly may have a support with parallel plates spaced apart from each other. The winch assembly may also have a drum with a hollow spool between the parallel plates, and a shaft passing axially through and being connected to the hollow spool. The winch assembly may further have a motor directly connected to an end of the shaft, and a fail-safe-brake directly connected to an end of the shaft.

The present disclosure relates to a hydraulic system including a variable displacement hydraulic motor for lifting and lowering a load. The hydraulic motor has a high operating speed and a low operating speed. The system also includes an actuator for controlling whether the hydraulic motor is operating at the high or low speed, and a pressure sensor for sensing when a system pressure corresponding to the hydraulic motor exceeds a threshold pressure value. The system further includes a speed control system that controls the actuator such that the hydraulic motor is prevented from operating at the first operating speed when the system pressure exceeds the threshold pressure value.