A shovel includes a lower travelling body; an upper pivot body pivotably mounted to the lower travelling body; an attachment attached to the upper pivot body; a plurality of actuators that include a first actuator and a second actuator, and drive the attachment and the upper pivot body; and a control device that controls an operation of another actuator of the plurality of actuators other than the first actuator in accordance with an operation of the first actuator so that the attachment is along a target trajectory. The control device operates the second actuator so that the attachment is along the target trajectory, when a predetermined condition is satisfied.

Embodiments of the present disclosure may be directed to a swivel joint for connecting hydraulic oil between a lower body of a construction machine and an upper body rotatably supported by the lower body, the swivel joint including: a rotation support body including a first body supported by the lower body and a second body rotatably coupled to the first body and rotating together with the upper body when the upper body rotates; and a sensor supported by the rotation support body to detect rotation of the upper body.

Embodiments of the present disclosure may be directed to a swivel joint for connecting hydraulic oil between a lower body of a construction machine and an upper body rotatably supported by the lower body, the swivel joint including: a rotation support body including a first body supported by the lower body and a second body rotatably coupled to the first body and rotating together with the upper body when the upper body rotates; and a sensor supported by the rotation support body to detect rotation of the upper body.

A hydraulic system for recovering potential energy of a load implement of a mobile construction vehicle. The hydraulic system includes first and second actuators and control valving. The first and second actuators are configured to be coupled to the load implement for controlling raising and lowering of the load element. The control valving is operable between a first position at which, during a lowering of the load implement, the control valving directs hydraulic fluid from one of the first and second actuators to an accumulator to charge the accumulator, and a second position at which the control valving directs hydraulic fluid from the accumulator to one or more of the first and second actuators to power the one or more of the first and second actuators to raise the load element.

A movement processing unit generates a work equipment operation signal for moving a bucket to a loading point and a swing operation signal related to a target swing speed, based on a command for starting an automatic movement of the bucket. A target speed changing unit changes the target swing speed so that the work equipment does not interfere with the loading target during a swing of a swing body.

A tracked vehicle comprising: a body comprising a lower structure and an upper structure rotatable relative to the lower structure about an axis; an angle sensor for detecting rotation of the upper structure relative to the lower structure; first and second track assemblies mounted, respectively, on opposite lateral sides of the body; a prime mover; an electronic control unit (ECU); and a transmission for controllably transferring power from the prime mover to the track assemblies based on an output of the ECU. The ECU is configured for responding to the angle sensor having detected a relative angular displacement in excess of a threshold angular displacement by: causing a signal to be emitted via an output interface to indicate that a directionality switchover is available to be requested; and, in response to detecting a directionality switchover request, causing the transmission to implement a directionality switchover for the tracked vehicle.

A control device of a loading machine includes an adjustment determination unit and an operation signal output unit. The loading machine includes a swing motor and a swing body. The adjustment determination unit determines whether or not an angle formed by an azimuth direction of a swing body when the swing body stops and a target stop azimuth direction is less than an allowable angle based on an azimuth direction, a swing speed, and the target stop azimuth direction of the swing body during braking of the swing motor. The operation signal output unit outputs a swing control signal for driving the swing motor in a case in which it is determined that the angle formed by the azimuth direction of the swing body when the swing body stops and the target stop azimuth direction is equal to or greater than the allowable angle.

A hydraulic system for recovering potential energy of a load implement of a mobile construction vehicle. The hydraulic system includes first and second actuators and control valving. The first and second actuators are configured to be coupled to the load implement for controlling raising and lowering of the load element. The control valving is operable between a first position at which, during a lowering of the load implement, the control valving directs hydraulic fluid from one of the first and second actuators to an accumulator to charge the accumulator, and a second position at which the control valving directs hydraulic fluid from the accumulator to one or more of the first and second actuators to power the one or more of the first and second actuators to raise the load element.

An engine cover (23) is provided between a counterweight (7) and a rear surface part (15B) of a cab (15) to be capable of opening/closing in an upper-lower direction and a heat exchanger cover (28) is provided between the rear side of a left side surface part (15C) and a right side surface part (15D) of the cab (15) and a revolving frame (6). The heat exchanger cover (28) is formed of a horizontal-opening structure of being rotatable in a front-rear direction to the revolving frame (6) with a front end (28C) in the front-rear direction as a fulcrum and a rear end (28D) in the front-rear direction as a free end. A heat exchanger cover lock mechanism (32) is provided on the rear end side of the heat exchanger cover (28) to hold the heat exchanger cover (28) in a closed state, and in a state where both the heat exchanger cover (28) and the engine cover (23) are closed, the engine cover (23) covers the rear end (28D) of the heat exchanger cover (28) and the heat exchanger cover lock mechanism (32) from backward.

A pivoting unit for construction equipment is provided which can ensure a brake performance for an upper pivoting body thereof for any pivoting power source applied thereto without a limitation to the applied pivoting power source. The pivoting unit for a construction equipment, comprises a pivoting motor, a pivoting reducer connected to the pivoting motor, and a parking brake device which is installed between the pivoting motor and the pivoting reducer and restricts the rotation of the pivoting reducer independently of the pivoting motor.