Kobelco Construction Machinery Co., Ltd.

Kobe Steel, Ltd.

Kabushiki Kaisha Kobe Seiko Sho

Hideki Yoshihara

Yoichiro Yamazaki

Seiji Saiki

Natsuki Yumoto

Koji Yamashita

Kazuhiro Ueda

Yusuke Kamimura

Sho Fujiwara

Daisuke Noda

Nobuhiro Koga

Yoshifumi Asai

Kazuhiro Iwasaki

Yoshitsugu Tamura

Nobuyuki Tomochika

A compaction management system includes a position calculation unit that, when a bucket is pressed against a compaction target ground, calculates a position of the bucket, a rolling compaction force calculation unit that, when the bucket is pressed against the compaction target ground, calculates a rolling compaction force applied to the compaction target ground using the attitude of the machine body, the attitude of the attachment, a pressure of a cylinder, and dimensions of the attachment, a rolling compaction record creation unit that creates a rolling compaction record in which the position calculated by the position calculation unit is associated with the rolling compaction force calculated by the rolling compaction force calculation unit, and a storage control unit that causes a storage device to store the rolling compaction record created by the rolling compaction record creation unit.

Compaction management system

A working machine control device includes a camera that obtains a captured image by imaging a particular part that is a part of a lower travelling body, and a controller, in which the controller includes a setting unit that sets a target slewing angle of an upper slewing body with respect to the lower travelling body, and a display control unit that causes a display unit to display a display screen in which a target image indicating a target position of the particular part is displayed in a superimposed manner at a position on the captured image, the position being where the particular part is displayed when a slewing angle of the upper slewing body with respect to the lower travelling body reaches the target slewing angle.

Working machine control device

When at least one of a value a detected output current to a magnet and a magnet load defined by the following formula is equal to or larger than a threshold value predetermined for the value of the detected output current or a threshold value predetermined for the magnet load, a controller constituting a control device outputs, to a control circuit, a command to decrease voltage applied to the magnet from next attracting operation. Magnet load=excitation ratio&#xd7;I&#xd7;V . . . ; wherein excitation ratio: excitation time/(excitation time+non-excitation time); I: value of the output current; V: voltage applied to a lifting magnet.

Control device for lifting magnet

A construction machine that, prior to performing a rewriting process of rewriting a currently used program with a renewal program, detects a charge amount of an electric storage device. When the charge amount detected is smaller than a rewrite charge amount preliminarily set as a charge amount required for the rewriting process, the rewriting is prohibited and the renewal program is transferred to storage. When the charge amount becomes sufficient, the rewriting process is performed using the renewal program stored in the storage.

Construction machine and program-rewritable system equipped with same

An electric motor includes a stator having an outer peripheral surface including a plurality of projections and a housing having an inner peripheral surface including a plurality of recesses and holding the stator in a state of respective fits of the projections with the recesses. The housing is internally formed with a cooling channel, which includes a plurality of main channels each formed in an inter-recess region defined between circumferentially adjacent recesses and a connection channel axially shifted from a recess and extending across the recess to connect main channels adjacent across the recess. The electric motor is capable of effectively cooling a stator without upsizing.

Electric motor

Simplification of a device configuration and control is realized, which enables attraction and release by a magnet without using a battery. A magnet work machine includes a generator motor () driven by an engine (); and an inverter () which controls a magnet () and the generator motor () such that the magnet () is energized by electric power from the generator motor () to attract metal scraps or the like, and during demagnetization for releasing metal scraps or the like, electric power applied to the magnet () is transmitted to the generator motor () as regenerative power so as to be consumed. The inverter () determines a torque of the generator motor () as a motor according to a voltage change of a main circuit based on a detected main circuit voltage so as to suppress the voltage change, and gives the torque as a command.

Magnet work machine

A malfunction diagnosing device that includes pistons arranged in a circumferential direction and discharges oil with rotation in the circumferential direction is provided, including: a pressure sensor for detecting a pressure value of oil discharged from a hydraulic pump in rotation; a speed sensor for detecting a rotation phase of the hydraulic pump at a time when a pressure value of oil is detected by the pressure sensor; a phase calculation part; and a rendering part for rendering a model of a relationship between pressure values of oil detected by the pressure sensor and rotation phases of the hydraulic pump detected by the speed sensor and the phase calculation part to thereby obtain pulsating waveform data. This makes it possible to diagnose a malfunction of the hydraulic pump without influence of a change in a rotation speed of the hydraulic pump.

Growing community of inventors

Hiroshima, Japan

Hideki Yoshihara