The application relates to a double acting demolition device according to one embodiment for demolishing structures. The device includes a first crushing jaw for crushing operation, a first cutting jaw for cutting operation, and a combination jaw. The first jaws are separate jaws. The combination jaw is attachable to the first cutting jaw for constructing a second crushing jaw and to the first crushing jaw for constructing a second cutting jaw. The second crushing jaw is used jointly with the first crushing jaw in crushing operation and the second cutting jaw is used jointly with the first cutting jaw in cutting operation. In crushing operation, the first crushing jaw rotates around a fulcrum other than that of the second cutting jaw in cutting operation.

A system has a hydraulic circuit configured to control a position of an attachment of the system and a control system configured to perform operations that include receiving an input indicative of a center of gravity of the attachment and controlling a flow rate of fluid directed through the hydraulic circuit based on the center of gravity.

The present application provides a pin shaft dismounting and mounting device, a frame body connecting structure and work machine. The pin shaft dismounting and mounting device for dismounting and mounting a pin shaft on a connecting seat, the pin shaft is provided with a through hole along the axial direction, and the device includes: a linear drive mechanism, including telescopic rods; and a pull rod configured to pass through the through hole, a first end of the pull rod being provided with an end cap structure, a connecting structure is disposed between a second end of the pull rod and an end portion of each telescopic rod. By the pin shaft dismounting and mounting device, a frame body connecting structure and work machine, the pin shaft may be dismounted and mounted conveniently and the problems of wear and deformation of the piston rod are solved.

An excavator includes a traveling body, an upper turning body rotatably provided on the traveling body, an attachment which has a boom, an arm, and a bucket and is attached to the upper turning body, and a controller configured to perform a control of a cylinder of at least one shaft of the attachment so as to suppress a vibration of the traveling body or the upper turning body, which is caused by an aerial operation of the attachment.

A disclosed shovel includes a hydraulic pump, a hydraulic actuator driven by hydraulic fluid supplied from the hydraulic pump, an electric motor configured to drive the hydraulic pump, a power storage device configured to be chargeable with power from an external power source to supply driving power to the electric motor, an input device configured to receive input from a user, an imaging device configured to acquire information about surroundings of the shovel, and a control device configured to set a target value of a charge amount of the power storage device, the power storage device being charged with power supplied from the external power source, in response to a predetermined input received by the input device.

An excavator includes a lower traveling body; an upper turning body mounted on the lower traveling body; an attachment attached to the upper turning body; an attitude detecting device configured to detect an attitude of the attachment including a bucket; and a control device configured to control a toe angle of a toe of the bucket with respect to an excavation ground, based on a transition of the attitude of the attachment, information relating to a present shape of the excavation ground, and an operation content of an operation device relating to the attachment.

A method for automatically adjusting the position of an implement of a lift assembly of a work vehicle includes determining a tilt transition boom angle for the lift assembly, determining a closed-loop control signal associated with controlling movement of the implement based at least in part on the tilt transition boom angle, generating a valve command signal based at least in part on the closed-loop control signal, and controlling an operation of at least one valve associated with the implement based at least in part on the valve command signal to maintain the implement at a target implement angle as a boom of the lift assembly is being moved across a boom travel range.

A work machine includes a mechanical arm. A work implement is coupled to the mechanical arm to receive a load. A hydraulic actuator moves the arm between a lower position and an upper position, wherein a distance between the lower position and the upper position is a travel distance of the mechanical arm. A sensor unit is configured to sense the load in the work implement. A valve is in fluid communication with the hydraulic actuator for supplying a fluid output to the hydraulic actuator. A controller is in communication with the valve and the sensor unit. The controller is configured to transmit a control signal to the valve to adjust the fluid output to the hydraulic actuator. The controller is also configured to adjust the upper position to reduce the travel distance in response to the load being at or above a threshold value.

In a work machine, a load information output part outputs a load calculated by a load calculation part as load information before a piston member shifting toward a stroke end reaches a specific position, and a load storage part stores the load calculated by the load calculation part as a specific load when the piston member shifting toward the stroke end reaches the specific position. The load information output part further outputs the specific load as the load information after the piston member shifting toward the stroke end enters a specific region.

One embodiment of a hydraulic system for a machine has a first hydraulic circuit including a first pump coupled to a first hydraulic actuator configured to move a first implement of the machine. A second hydraulic circuit includes a second pump coupled to a second hydraulic actuator configured to move a second implement. An electric motor mechanically couples to the first pump and to the second pump. An operator interface receives input from an operator requesting movement of the first and second implements. A controller communicatively coupled to the electric motor and to the operator interface determines, based on the requested movement of the first and second implements respectively, first and second flow allocations respectively for the first and second pumps and determines respective target displacements for the first and second pumps. The controller also determines first and second target electric motor speeds based on the target displacements for the first and second pumps, respectively, and controls the electric motor to operate at the larger of the first and second target electric motor speeds.