It is determined whether a velocity estimation model is established from an actual operating velocity Vr and a target operating velocity Vt of each of actuators 20A, 21A, and 22A; in a case in which the velocity estimation model is established, a dynamic center-of-gravity position of a hydraulic excavator 1 in a case in which each of the actuators 20A, 21A, and 22A is suddenly stopped from a driven state is predicted from an estimated operating velocity Ve; in a case in which the velocity estimation model is not established, the dynamic center-of-gravity position is predicted from the actual operating velocity Vr and it is determined whether to execute control intervention using the predicted dynamic center-of-gravity position; and in a case in which it is determined to execute the control intervention, the target operating velocity Vt is corrected in such a manner that each of the actuators 20A, 21A, and 22A slowly decelerate. It is thereby possible to appropriately carry out operating velocity limiting on a front work implement 2 and slow deceleration of the front work implement 2 and to suppress reductions in workability and operability, a deterioration in a ride quality, and the like even in a case of work involving an abrupt change in disturbance or a change in the lever operation amount within minute time.

A system and method for indicating to an operator a forward direction of travel of a machine having a ground-engaging traveling device, a superstructure rotatably mounted to the traveling device and an operator station defining an operator point of view are provided. The system includes a system controller, a rotation-sensing system connected to the system controller for determining a rotational relationship of the superstructure with respect to the traveling device, and a singaler mounted to the operator station and connected to the system controller for indicating to the operator the forward direction of travel of the machine in accordance with the operator point of view. The method includes receiving a rotational relationship of the superstructure with respect to the traveling device, and indicating to the operator the forward travel direction of the machine in accordance with the operator point of view.

To provide a small hydraulic excavator, which even may have an upperstructure formed such that at least its rear end swings within a body width range and having a limited installation space for devices, that allows an accumulator to be disposed and allows the accumulator to be protected from external force generated during work. The present invention relates to a rear small-swing type mini excavator that includes an accumulator 30 accommodating and recovering potential energy and hydraulic energy used by at least one of drives of an undercarriage 1, an upperstructure 2 formed such that its rear end swings within the body width range of the undercarriage 1, and a working device 3. In the rear small-swing type mini excavator, the accumulator 30 is disposed between a valve block 26 and a front longitudinal board 41 of a longitudinal board member included in a main frame 10 along the front longitudinal board 41, and a pipe connected to the accumulator 30 and the valve block 26 is disposed closer to the accumulator 30 and the valve block 26.

An upper body includes a bearing seat surface that is fixed by a bearing bolt to the upper surface of a swing bearing, a swing frame that includes an intersecting side plate intersecting the bearing seat surface and is fixed to the bearing seat surface, and a force dispersing member. The force dispersing member includes at least one vertical plate extending in the up-down direction. The at least one vertical plate is fixed to a region of the bearing seat surface other than a force dispersion target region.

An angular position sensor is disclosed. The angular position sensor has a cylindrical magnet holder that has a base portion attached to a top surface of a shaft and a magnet holding portion extending from the base portion. A magnetic coding is arranged on the outer surface of the magnet holding portion that establishes a magnetic field. A sensor base encircles the base portion of the magnet holder and supports magnetic field sensors that are fixed on an arc-segment. The arc-segments partially overlap so that output signals of the magnetic field sensors are indicative of the angular portion of the sensor base relative to the shaft.

The vibration of a cab deck as well as the mass of a deck supporting member is suppressed. A slewing frame of an upper slewing body includes a front plate connected to a second side plate. A cab deck is disposed on a front side of an engine deck with a gap between the cab deck and the engine deck. A deck supporting member is connected to the second side plate and the cab deck. When viewed along an up-and-down direction, a connection portion of the front plate to be connected to the second side plate is opposed to, in the lateral direction via the second side plate, a connection portion of the deck supporting member to be connected to the second side plate.

Power machines such as excavators having a house that rotates about a vertical axis on an undercarriage are disclosed. In certain conditions, a control system on the excavator can limit rotational movement of the house and/or pivoting of a swing function on a lift arm to contain work performed by an implement to a predefined range or work area.

A shovel includes a lower traveling body, an upper turning body turnably mounted on the lower traveling body, a covering attached on the upper turning body, and a camera for surroundings monitoring placed on the upper turning body. A cut is formed in the covering. The camera is placed on the upper turning body such that at least part of the camera is within the covering through the cut.

The present disclosure relates to a backhoe loader for efficient digging. The backhoe loader includes: a vehicle body, including a first vehicle body and a second vehicle body which are connected sequentially; a loading device, arranged on the first vehicle body; a control platform, arranged on the second vehicle body and configured to rotate by 360? relative to the second vehicle body; a cab, arranged on a first side of the control platform; and an excavating device, arranged on a second side of the control platform opposite to the first side, the excavating device being configured to rotate by 180? relative to the cab. The backhoe loader can realize functions of 360? excavating and bidirectional driving. When the excavating device works, the backhoe loader can be directly moved by folding stabilizers and without changing the position of a seat back and forth, so that the excavating efficiency is improved.

The present disclosure provides a modular excavator, including a plurality of assembly modules that are detachably connected, the plurality of assembly modules including: a frame turntable base module; a track beam assembly module connected to the frame turntable base module; a track module connected to the track beam assembly module; a slewing drive module connected to the frame turntable base module; a power assembly module connected to the frame turntable base module; a counterweight module connected to the power assembly module; a cab module connected to the frame turntable base module; a fuel tank module connected to the frame turntable base module; a boom assembly module connected to the frame turntable base module; a bucket arm assembly module connected to the boom assembly module; and a work tool module connected to the bucket arm assembly module.