Kubota Corporation

Kuboto Corporation

Eiji Miyazaki

Masataka Takagi

Shuichi Takeshita

Tsuyoshi Aoki

Hiroki Fukudome

Masayuki Nakano

Kenzo Ushiro

Masaki Abe

Yutaka Inubushi

Takahiro Yonekura

Koji Saito

Seimei Nishikawa

Juzo Okamoto

Yoshiro Takao

Sosuke Miyauchi

Tuyoshi Aoki

A hydraulic block includes multiple pairs of actuator ports connectable to a hydraulic actuator and a discharge oil passage for discharging work oil returned from the hydraulic actuator to the outside. The charge oil passage includes a first oil passage corresponding to a predetermined actuator port of all the actuator ports and a second oil passage corresponding to non-predetermined actuator ports other than the predetermined actuator ports. The first oil passage is disposed in parallel with the second oil passage.

Hydraulic block

A work vehicle including an attachment mechanism for attaching a backhoe to a vehicle body. The attachment mechanism includes a pin provided in the vehicle body, an engaging body provided in the backhoe and engageable with the pin, and a locking body for fixing the engaging body to the pin under mutually engaged state. As the engaging body comes into engagement with the pin, the engaging body and the pin are fixed under the mutually engaged state.

Work vehicle and backhoe

A structure for attaching a rear work machine to a tractor is provided. The tractor has a vehicle body which is provided with right and left rear work machine connection bodies, each having upper and lower connection portions. The rear work machine includes a base frame with an operator's seat, which is provided with right and left attaching plates, each having upper and lower engagement portions. The rear work machine can be attached to the tractor by connecting the upper and lower engagement portions to the upper and lower connection portions, respectively. The attaching structure includes: a rear work machine attaching spacer disposed between the rear work machine connection body and the corresponding attaching plate, the rear work machine attaching spacer including: a fixing portion for fixing to the attaching plate; and the upper and lower spacer engagement portions for removably connecting the upper and lower connection portions, respectively.

Structure for attaching rear work machine to tractor

A work apparatus to be mounted to a work vehicle includes: a pair of cylindrical mastsdisposed erect on right and left sides of a vehicle body having a control valve; a boompivotally supported to the masts; an implement pivotally supported to the boom; a boom cylinderfor pivoting the boom; an implement cylinderfor operating the implement; a boom piping system communicating the control valve with the boom cylinder; and an implement piping system communicating the control valve with the implement cylinder; wherein a channel constituting memberconstituting the boom piping system extends vertically within each mast; one end of the channel constituting memberextends to the outside at a lower portion of the mast to be connected with the control valve; and the other end of the channel constituting memberextends to the outside at an upper portion of the mastto be connected with boom cylinder

Loader work apparatus

A work vehicle operable in a rearward facing position using a simple construction is disclosed. The work vehicle includes a hydrostatic stepless change speed device for transmitting power from an engine to a traveling device, a change speed pedal mechanism operable in a forward facing position for changing speeds in the hydrostatic stepless change speed device, and a travel-control lever provided at a rear position of a vehicle body and operable in the rearward facing position. The travel-control lever and the change speed pedal mechanism are linked to each other through a mechanical interlocking mechanism so as to control the hydrostatic stepless change speed device by the travel-control lever through the change speed pedal mechanism.

Work vehicle with drive operation device

A tractor with a backhoe is disclosed. The backhoe is mounted to a rear portion of the tractor. The backhoe has a boom, an arm pivotally supported to a leading end of the boom, a bucket pivotally supported to a leading end of the arm, a boom cylinder for operating the boom, an arm cylinder for operating the arm and a bucket cylinder for operating the bucket. The tractor includes a frame attached to a rear portion of the tractor, a swing bracket supported to a rear portion of the frame to be pivotable about a vertical axis, a control valve unit having control valves for controlling the boom cylinder, the arm cylinder and the bucket cylinder and a hose unit for feeding pressure oil from the control valve unit to the boom cylinder, the arm cylinder and the bucket cylinder. The wing bracket includes a first opening open to the front side and a second opening open to the rear side. The control valve unit is disposed, in its plan view, on an extension line of the first opening and the second opening. The hose unit extends substantially linearly from the control valve unit through the first opening to the second opening.

Tractor with backhoe

A work vehicle with a working implement, comprising: a control leverfor controlling the working implementthe control lever being rockably disposed laterally of a driver's seatmounted on a vehicle bodya control valvedisposed laterally of the vehicle body for controlling actuatorsthat drive the working implement; and interlocking linksfor interlocking the control lever and spoolsof the control valveand transmitting rocking of the control lever to the spools; wherein the control leverand the spoolsare staggered transversely and longitudinally of the vehicle bodyand the interlocking linksare bent, one end of each interlocking link being connected to a first link connectorconnected to the control lever, the other end of each interlocking link being connected to a second link connector connected to one of the spools.

Work vehicle with staggered control level

A work vehicle includes a traveling vehicle, a backhoe having a base frame detachably connected to a rear portion of the traveling vehicle and an excavator detachably attached to a rear portion of the base frame. The base frame includes a pair of upper and lower base plates and a partitioning wall disposed at a fore-and-aft intermediate portion of the base plates for connecting the two base plates with each other and partitioning a space delimited between the plates relative to a fore and aft direction. A control box is mounted on the base frame. At least one swing cylinder is mounted to the base frame through the partitioning wall for pivoting the excavator. A control valve unit is attached to the partitioning wall downwardly of the control box for controlling a working fluid for driving the swing cylinder and the excavator. At least one swing hose is extended through the partitioning wall for hydraulically connecting the control valve unit to the swing cylinder.

Work vehicle having improved mounting structure of control valve unit

A reinforcing frame construction having ROPS and a rear axle casing projecting to the right and left from a tractor vehicle body. The construction includes a pair of right and left loader attaching members for detachably attaching a front loader, the loader attaching members being connected to an intermediate portion of the vehicle body and projecting therefrom to the lateral sides, a pair of right and left rear supporting members provided in the rear axle casing for supporting right and left legs of the ROPS, and a pair of right and left connecting members to which a rear implement is connected, the connecting members being fitted into the rear axle casing and being detachably connected to the rear supporting members. Extension portions of the connecting members extending forwardly therefrom are detachably connected to the loader attaching members.

Reinforcing frame construction for tractor having ROPS

A backhoe unit detachably attached to a backhoe mounting frame disposed on a tractor body rearwardly of a driver's seat. The backhoe unit includes a base having engaging portions for connection to the backhoe mounting frame, a driver's footrest and a control column disposed on the base, a vertical swing axis supported by the base, a boom bracket supported to be swingable about the vertical swing axis, and a boom assembly attached to the boom bracket. The boom bracket is swung horizontally by a single swing cylinder having one end thereof connected to the base through a first cylinder connecting portion, and the other end connected to the boom bracket through a second cylinder connecting portion. The swing cylinder is disposed in a lateral position of the base.

Growing community of inventors

Sakai, Japan

Eiji Miyazaki