Provided is a parking brake apparatus installable on a work machine. The parking brake apparatus includes: a parking brake switchable between a braking state of braking the turning of an upper turning body and a braking release state; a brake operation device to which a braking operation and a braking release operation for switching the parking brake to the braking state and the braking release state, respectively, is applied by an operator; and a braking control unit. The braking control unit judges whether or not a turning judgment requirement for judging whether or not the upper turning body is performing a turning motion is satisfied, and performs a braking operation invalidation control to invalidate the braking operation applied to the brake operation device when judging the turning motion is being performed.

The present disclosure relates to a turntable assembly and an engineering mechanical equipment. A turntable assembly for an engineering mechanical equipment includes: a turntable body; a first rotating mechanism connected to the turntable body and configured to cause the turntable body to rotate relative to an undercarriage of the engineering mechanical equipment; and a second rotating mechanism connected to the turntable body and configured to cause an upper work device of the engineering mechanical equipment to rotate relative to the turntable body. An axis of rotation of the first rotating mechanism is not co-linear with an axis of rotation of the second rotating mechanism. The second rotating mechanism includes a rotating body for connecting the upper work device. At least two hinge points arranged spaced apart along the axis of rotation of the second rotating mechanism are provided between the rotating body and the turntable body.

An electrically driven construction machine that can suppress damage to a feeding cable is provided. An electrically driven excavator includes a swing angle sensor that senses the swing angle of a swing structure, a cable stand that is disposed on the swing structure and has a holding unit that holds a feeding cable, a rotational angle sensor that senses the rotational angle of the holding unit of the cable stand, a swing lock valve, and a controller. The controller computes the position of the holding unit of the cable stand on the basis of sensing results of the swing angle sensor and the rotational angle sensor when a connection sensor senses a state in which the feeding cable is connected to a feeding port. Further, the controller controls the swing lock valve to an interrupting state to inhibit a swing of the swing structure when the computed position of the holding unit goes outside a predetermined range.