Komatsu Corporation

Kabushiki Kaisha Komatsu Seisakusho

Eiichi Muramoto

Kentaro Watanabe

Kazuyuki Yamazaki

Toyohiko Youan

Takuya Uemura

Toshio Kitani

Tooru Hishiyama

Yasuo Fujiwara

Hidemi Maeo

Shimpei Abe

Touru Hishiyama

A crushing control apparatus for a shearing crusher, which properly controls the crusher in accordance with kinds of objects to be crushed and is capable of reliably preventing stop of operation due to excessive load, clogging and the like, is provided. For this purpose, the crushing control apparatus includes a mode selecting switch () for selecting a mode according to each kind of the objects to be crushed, a ROM () for storing a control condition of the rotary shafts (), which conforms to the mode for each of the mode, and a controller (), which reads out the control condition corresponding to a selected mode from the ROM, when the predetermined mode is selected by the mode selecting switch, and controls the rotary shafts to be in the control condition which is read out.

Crushing control apparatus for shearing crusher

A ground drilling machine comprises a controller for automatically controlling the injection of working liquid according to the output signal output as a function of the rotating condition of the pilot head. When the pilot headis driven forward or backward, working liquid can be injected by switching the working liquid transfer valveso long as the pilot headis revolving in order to improve the digging efficiency, the soil delivering efficiency and the cooling efficiency of the machine. The injection of working liquid can be suspended when the direction of propelling the pilot headis shifted while stopping the revolution of the pilot headbecause no working liquid is required for delivering the dug soil and cooling the leading body. Thus, working liquid can be injected always at an optimal rate depending on the rotating condition of the pilot headto suppress any waste of working liquid and reduce the construction cost.

Ground drilling machine

A leading body for a ground drilling machine is provided which includes a main body which is tapered at a front end thereof to form a first sloped surface and a second sloped surface on opposite sides of the front end of the main body. A slant-cutting section extends from the main body substantially along the first sloped surface. And injection ports which are adapted to inject digging liquid are positioned in the slant-cutting section such that the injection ports inject digging liquid rearward with respect to a propelling direction of the leading body along an obtuse angle with respect to a rotation axis of the leading body and substantially along the second sloped surface.

Leading body for ground drilling and ground drilling machine

A track roller suspension apparatus for a track-type vehicle having a track frame and a track assembly mounted on the track frame, which includes a shaft rotatably mounted on the track frame, a first arm rotatably mounted on the shaft, a second arm rotatably mounted on the shaft, the first and second arms being arranged crossing each other, and a pair of track rollers each mounted on the respective arms. Resilient pads are disposed between the first and second arms to absorb shock loads.

Track roller suspension apparatus for a track-type vehicle

Growing community of inventors

Hirakata, Japan

Eiichi Muramoto