Kubota Corporation

Kunihiro Suzuki

Ryohei Sumiyoshi

Yuji Yamashita

Satoshi Tajima

Hiroyuki Anami

Toshihiko Takemura

Hayato Kawano

Kazuyoshi Arii

Hiroaki Kurachi

Yuji Fukuda

Keisuke Miura

Ryosuke Kinugawa

Taiki Furuki

Masahiro Kuroda

Ikuhiro Uotani

Hideo Imai

Hajime Tamaki

Toyoaki Yasuda

Teruhiko Iwamoto

Tetsuji Matsushita

Megumi Miyamoto

Kazuhiro Masutani

Hitoshi Ono

Yukiya Chiba

A hydraulic system for a work machine includes a hydraulic pump to supply a pilot fluid, and a hydraulic switch valve to be switched to a plurality of switching positions based on a pilot pressure. The pilot pressure is a pressure of the pilot fluid supplied from the hydraulic pump. The hydraulic system includes a direction switch valve to apply a first pilot pressure to the hydraulic switch valve to switch the hydraulic switch valve into one of the plurality of switching positions. The hydraulic system includes a pressure applying device to apply a second pilot pressure to the hydraulic switch valve. The second pilot pressure is lower than the first pilot pressure.

Hydraulic system for work machine, and work machine

A working machine includes a rear machine body on which an operator's seat is mounted, a front machine body to which a working tool is attached, a center shaft having a first axis extending in a fore-and-aft direction, a first supporting part supporting the center shaft rotatably relative to the rear machine body around the first axis, a coupling shaft having a second axis extending in a vertical direction and connected to the front machine body, and a second supporting part supporting the center shaft rotatably relative to the coupling shaft relative to the second axis. The first supporting part includes a first spherical plain bearing, and the first spherical plain bearing includes a first inner wheel including a convex curved sliding surface and provided on an outer circumferential surface of the center shaft, and a first outer wheel including a concave curved sliding surface and provided on the rear machine body.

Working machine

A cabin includes: a panel disposed on a side of an operator seat, the panel including: a plurality of cross members extending in a first direction; and a plurality of transverse members intersecting with the plurality of cross members each other and extending in a second direction; a glass panel disposed on a side of the panel; a window frame disposed on the glass panel; a window panel disposed on the window frame, the window panel being configured to move in the first direction or in the second direction; a projecting member disposed on a side of the window panel, the side being an identical side to the operator seat, the projecting member being configured to move together with the window panel; and a guide portion configured to accept insertion of the projecting member and to limit a moving distance of the window panel.

Cabin of working machine and working machine having cabin

A work machine includes a machine body, a motor provided in a rear portion of the machine body, a bonnet which covers a rear of the motor and which is openable, a tank disposed between the motor and the bonnet, and a support member. The support member includes a bracket supporting the tank on the bonnet such that the tank is separated from the bonnet.

Work machine with tank supported on bonnet

Cabin of working machine, working machine having cabin, and method for manufacturing cabin

A working machine includes a machine body including a motor room, a motor mounted on the machine body and housed in the motor room, a fan arranged above the motor, the fan being to generate an air flow downward, a radiator arranged above the fan, an oil cooler arranged above the fan, and a shroud disposed around the fan. The shroud includes an opening rim portion forming an air inlet to take air from the motor room.

A working machine includes: a motor; a fan arranged above the motor, the fan being configured to generate an air flow downward; a radiator arranged above the fan; and an oil cooler arranged adjacent to the radiator. In addition, the working machine includes: a shroud disposed around fan, the shroud including: a rim portion forming an air vent hole, the air vent hole being for passage of the air flow generated by the fan; and a support member attached to an upper portion of the shroud, the support member being configured to support the radiator and the oil cooler.

Air conditioning duct for construction equipment

Headlight for construction equipment

Disclosed is a work machine having a traveling apparatus and a work implement driven by an engine. A hydraulic system mounted on the work machine includes an HST pump comprising a swash plate, variable displacement pump driven by the engine, an HST motor connected in a closed circuit to the HST pump and a pair of speed-changing oil passageways, the HST motor being driven by an amount of oil supplied by the HST pump, thereby to drive the traveling apparatus, a main pump driven by the engine, the main pump supplying pressure oil to the work implement, a pilot pump driven by the engine, a swash plate positioning circuit configured to effect positioning of a swash plate of the HST pump with pilot oil supplied from the pilot pump, and a bleed circuit configured to drain, via a throttle, a portion of the pilot oil supplied to the swash plate positioning circuit.

Work machine

A wheel loader having good operability. The wheel loader has a machine body travelably supported on wheels; a working device supported on the machine body, the working device having a boom swingably supported at its base end side on the machine body, an arm swingably supported at and connected to the forward end side of the boom, and a working tool swingably provided on the forward end side of the arm; travel operation means for performing travel operation of the machine body; and a brake for braking, when the travel operation means is not operated and the arm is swung, the wheels in operative association with the swing of the arm.

Wheel loader

A wheeled work machine in which the center of gravity of a machine body is positioned low and the stability of the machine in a working position is secured without regard to the movement of the center of gravity caused by the rotation of a rotation table during work. An operation body () integrally rocking with a front axle case () is provided at the center in the left-right direction of the front axle case (), and a rocking lock mechanism () for limiting the rocking of the operation body () is provided at a machine body frame (). The rocking lock mechanism () has a lock cylinder () in which a piston rod () is horizontally fixed to the machine frame () and a switchover valve () for switching two oil chambers (A,B) of the lock cylinder () between a communicated state and a closed state. A cylinder tube () of the lock cylinder () is operably connected to the operation body ().

Growing community of inventors

Sakai, Japan

Kunihiro Suzuki