Kubota Corporation

Toshifumi Yasuda

Yusuke Morita

Akihiro Takami

Takashi Kuramoto

Kensuke Okabe

Hiroshi Takagi

Kohta Nakao

Jun Yoshida

Yuki Monde

Yusuke Endo

Kazuhiro Tanaka

Hiroyuki Suzuki

A transfer-case attaching device includes a fixation mechanism. The fixation mechanism includes a connection bolt. The connection bolt includes a screw shaft portion, a large-diameter shaft portion, and a flange portion. The large-diameter shaft portion has a first contact surface at an end portion of the large-diameter shaft portion. The flange portion has a second contact surface at an end portion of the flange portion. A gap between the first contact surface and the second contact surface is set to a tightening-amount limited region, in which tightening of the connection bolt with respect to a transfer case is restricted to or below a predetermined tightening amount.

Transfer-case attaching device and multi-purpose vehicle including the transfer-case attaching device

A transmission includes a speed change gearbox including gears configured to be switched by a movement of a shifter having a cam pin in a guide groove and configured to be moved by a movement of the cam pin following the rotation of a shift drum. The guide groove includes a bent section having an inner wall on an inner side that is formed by (i) first end mill machining performed in a direction in which the guide groove extends; and (ii) second end mill machining performed in the direction in which the guide groove extends, in such a manner as to increase a curvature radius of the inner wall on the inner side formed by the first end mill machining.

Transmission and method for producing transmission

In a utility vehicle, a differential mechanism is provided with a cylindrical portion and a connection portion, respectively on a first end portion and a second end portion of the differential mechanism in a front-rear direction of a body of the utility vehicle. A vehicle fame is provided with a first holder for allowing the vehicle frame to hold the cylindrical portion and a second holder for allowing the vehicle frame to hold the connection portion. The first holder has a through hole receiving the cylindrical portion and is configured to lock the cylindrical portion by the through hole. The second holder includes a first attachment piece and a second attachment piece. The second holder is configured to, with the connection portion between the first and second attachment pieces, connect the connection portion to the first and second attachment pieces by a connection bolt extending in a vehicle width direction.

Utility vehicle

A detent mechanismis provided for fixing a shift drumin position at a rotation operation position where shift gearsbecome engageable. The detent mechanismincludes a positioning rotation portionformed in the shift drum, a positioning armengageable with a positioning action portionformed in the positioning rotation portionfor fixing the shift drumat a rotation position corresponding to a rotation operation position of the shift drum, and a positioning springfor urging the positioning armfor its engagement with the positioning action portion. The positioning arm, as being rotatably supported to a speed changing operation shaftfor rotating the shift drum, is extended from a speed changing operation shaft

Gear transmission

A work vehicle includes an engine (); a traveling device () capable of traveling on the ground; a power transmission device () that transmits driving power of the engine () to the traveling device () with a work oil; a cooling device () for cooling the engine () with a cooling fluid; a storage unit () having a first storage space (A) for storing the work oil and a second storage space (B) for storing the cooling fluid.

Work vehicle

A diff-lock operation shaftis supported by a casein such a manner as to be rotatable around an axis Pof the diff-lock operation shaftand operates a diff-lock sectionto a lock position Aby being rotated, and a first coil springis wound around the outer surface of the diff-lock operation shaftconcentrically with the diff-lock operation shaft, and is linked at one end portionto the diff-lock operation shaftand at another end portionto linking membersand. The first coil springis twisted around the axis Pvia the linking membersandby the manual operation toolbeing operated, and the diff-lock operation shaftis rotated via the first coil spring

A gear transmission having a speed changing section includes a speed changing gear for setting a speed stage and a shift gear slidably mounted on a rotation support shaft and operated to engage and disengage with the speed changing gear, the speed changing section configured to speed-change inputted power and to output the resultant power via the rotation support shaft. An arrangement is provided for facilitating engagement of the shift gear with the speed changing gear even when respective end faces of the shift gear and the speed changing gear hit each other. A transmission mechanism (B) is provided for outputting power of a rotation support shaft () to a traveling device. The transmission mechanism (B) has a transmission flexibility portion () which allows free rotation of the rotation support shaft () by a set rotation angle.

A work vehicle includes a power transmission unit having a differential device for transmitting power to left and right axles and a power transmission mechanism for transmitting power to the differential device, and a transmission shaft for transmitting power to the power transmission unit. The power transmission mechanism includes a first gear mechanism to which power from the transmission shaft is transmitted and a second gear mechanism for transmitting power from the first gear mechanism to the differential device.

A multipurpose vehicle includes a stepless speed changer which is provided at one of lateral sides of a vehicle body with respect to an engine and a traveling transmission, an engine output shaft projected from the engine toward the stepless speed changer along a lateral direction of the vehicle body, a speed changer input shaft projected from the stepless speed changer toward the engine along the lateral direction of the vehicle body, and a first gear transmission mechanism provided between and across the engine output shaft and the speed changer input shaft and transmitting power of the engine output shaft to the speed changer input shaft. The multipurpose vehicle further has a PTO section provided at the side of the stepless speed changer with respect to the engine and forwardly of the stepless speed changer, the PTO section being operably connected to the engine output shaft via a second gear transmission mechanism.

Multipurpose vehicle

A gear transmission () includes a plurality of shift gears (), a plurality of shifters () engaged, respectively, with the plurality of shift gears (), and a shift drum () rotatably operated by a stepped speed changing operational tool () to operate the plurality of shifters (), thus being speed-changed in forward three speed stages. The stepped speed changing operational tool () is switched to a neutral position, a forward third speed position, a forward second speed position and a forward first speed position in this cited order.

Multiple-purpose vehicle

A multipurpose vehicle includes an engine, a travel transmission device, a continuously variable transmission device, and a spacer housing capable of becoming attached to and detached from the engine, the continuously variable transmission device, and the travel transmission device. The spacer housing contains an engine output shaft, a transmission device input shaft of the continuously variable transmission device, a first connecting portion connecting the engine output shaft with the transmission device input shaft in an interlocking manner, a transmission device output shaft of the continuously variable transmission device, a transmission input shaft of the travel transmission device, and a second connecting portion connecting the transmission device output shaft with the transmission input shaft in an interlocking manner.

Growing community of inventors

Sakai, Japan

Toshifumi Yasuda