Abstract: In a riding work vehicle, power of an engine is transmitted to a traveling wheel via a horizontally oriented transmission shaft and a vertically oriented transmission shaft. The traveling wheel is supported to be changeable in direction about a rotational axis of the vertically oriented transmission shaft. Each of the vertically oriented transmission shaft and a vertically oriented transmission case is provided as an inner/outer double structure expandable/contractible in association with sliding movement thereof. The vertically oriented transmission case is supported to be pivotable together with the traveling wheel. There is provided a vehicle height adjustment mechanism capable of switching, in a plurality of steps, a relative height of the traveling wheel relative to a vehicle body frame.

Abstract: A work vehicle includes: a body 1; a plurality of travel wheels 2 at front and back portions of the body 1 on each of left and right sides; a plurality of holder mechanisms A held by the body 1 and holding the respective travel wheels 2 in such a manner as to be capable of moving the travel wheels 2 independently of one another relative to the body 1; a detector B configured to detect a state of a travel surface; and a controller C configured to, based on the state that the detector B has detected, control the holder mechanisms A to move the travel wheels 2 relative to the body 1.

Abstract: A work vehicle includes: a body 1; a plurality of travel wheels 2 at front and back portions of the body 1 on each of left and right sides; a plurality of holder mechanisms A held by the body 1 and holding the respective travel wheels 2 in such a manner as to be capable of moving the travel wheels 2 independently of one another relative to the body 1; and a plurality of crawler travel devices E attachable to and detachable from the respective holder mechanisms A.

Abstract: A work vehicle includes a vehicle body, a plurality of traveling devices disposed on the right and left sides on the front and rear sides of the vehicle body respectively, a plurality of bending link mechanisms configured to liftably support each one of the traveling devices to the vehicle body and a plurality of drive operating devices capable of changing the posture of each one of the plurality of bending link mechanisms. The vehicle body is split into a front side body section and a rear side body section. The front side body section and the rear side body section are configured to be bendably pivotable relative to each other via a pivot interlocking mechanism.

Abstract: A rotating electrical machine includes a stator, a rotor located radially inward of the stator and being rotatable, and an input member including an input shaft through which rotation power is inputted into the rotor, wherein the input member includes an internally toothed gear portion to rotate as the input shaft rotates, and the rotor includes first external teeth to mesh with the internally toothed gear portion. The rotating electrical machine preferably includes an output member including an output shaft through which rotation power is outputted from the rotor, the input member preferably includes an externally toothed gear portion to rotate as the input shaft rotates, and the output member includes second external teeth to mesh with the externally toothed gear portion.

Abstract: A work vehicle includes a plurality of traveling devices for driving traveling, a plurality of articulated link mechanisms having at least two or more joints and supporting the plurality of traveling devices to a vehicle body, with allowing the plurality of traveling devices to be elevated/lowered independently of each other, a driving mechanism capable of changing respective postures of the plurality of articulated link mechanisms independently of each other, and a plurality of turning mechanisms configured to support the respective plurality of the articulated link mechanisms, with allowing the link mechanisms to be orientation-changeable about a vertical axis.

Abstract: A work vehicle including: a first link having one end portion supported by a vehicle body so as to be pivotable; a second link having one end portion pivotally coupled to the other end portion of the first link so as to be pivotable, and another end portion that supports a travel wheel; a first hydraulic cylinder capable of changing a swing posture of the first link; and a second hydraulic cylinder capable of changing a swing posture of the second link relative to the first link. The action of the first hydraulic cylinder is controlled such that a swing position of the first link is located at a target position, based on the result of detection performed by a position detection sensor, and the action of the second hydraulic cylinder is controlled such that thrust has a target value, based on the results of detection performed by pressure sensors.

Abstract: An agricultural robot includes a machine body, a wheeled traveling device to support the machine body such that the machine body is capable of traveling, the traveling device including at least three wheels, a manipulator including an arm and a robot hand, the arm being attached to the machine body, the robot hand being attached to the arm and capable of holding an object, and a balance controller to control positions of the at least three wheels, respectively, to achieve a balance between the machine body and the manipulator.

Abstract: A work vehicle includes a vehicle body, a plurality of traveling devices for driving traveling, a plurality of bending link mechanisms supporting the plurality of traveling devices to the vehicle body with allowing the plurality of traveling devices to be elevated/lowered independently of each other, a driving mechanism capable of changing respective postures of the plurality of bending link mechanisms independently of each other, and an idle wheel freely rotatably supported to an intermediate bending portion of each one of the plurality of bending mechanisms.

Abstract: A plurality of traveling wheels are supported via expandable/contractible tubular support members to a vehicle body frame. A hydraulic operation type vehicle height adjustment mechanism provided for each one of the traveling wheels, the vehicle height adjustment mechanism being capable of switching a relative height of the traveling wheel relative to the vehicle body frame within a predetermined length range by expanding/contracting the support member by a hydraulic cylinder. There are provided a hydraulic control valve capable of controlling feeding state of work oil to each one of the plurality of hydraulic cylinders, a controlling section for controlling an operation of the hydraulic control valve to bring the vehicle body to a target state via vehicle height adjustment by the hydraulic cylinder in response to a change in the posture of the vehicle body and a plurality of accumulators connected oil chambers of the respective plurality of hydraulic cylinders.

Abstract: A work vehicle includes a plurality of traveling devices driven for traveling, a plurality of articulated link mechanisms having a plurality of links pivotally coupled to each other to provide two or more joints and configured to independently support the traveling devices to a vehicle body with allowing lifting/lowering of the traveling devices independently relative to the vehicle body, and a plurality of hydraulic cylinders capable of changing respective postures of the plurality of links included in the articulated link mechanisms. A first link located at a position nearest the vehicle body is supported to be pivotable about a body side coupling portion. A first hydraulic cylinder for operating the first link has its cylinder tube side pivotally coupled to a coupled portion on the side of the vehicle body and has its piston rod side pivotally coupled to a coupled portion on the side of the first link.

Abstract: A work vehicle includes a plurality of traveling devices driven for traveling, a plurality of articulated link mechanisms having a plurality of links pivotally coupled to each other to provide two or more joints and configured to independently support the traveling devices to a vehicle body with allowing lifting/lowering of the traveling devices independently relative to the vehicle body, and a plurality of hydraulic cylinders capable of changing respective postures of the plurality of links included in the articulated link mechanisms. A first link located at a position nearest the vehicle body is supported to be pivotable about a body side coupling portion. A first hydraulic cylinder for operating the first link has its cylinder tube side pivotally coupled to a coupled portion on the side of the vehicle body and has its piston rod side pivotally coupled to a coupled portion on the side of the first link.

Abstract: A work vehicle includes: a vehicle body; a plurality of traveling devices located on both right and left sides of the vehicle body; a plurality of bending link mechanisms that support the respective traveling devices on the vehicle body such that the traveling devices can be individually raised or lowered; and a plurality of drive mechanisms capable of individually changing the posture of the bending link mechanisms. The drive mechanisms change the posture of the bending link mechanisms while maintaining a state in which intermediate bending portions of the bending link mechanisms bend toward an intermediate side in a front-rear direction of the vehicle body.

Abstract: A work vehicle including: a first link having one end portion supported by a vehicle body so as to be pivotable; a second link having one end portion pivotally coupled to the other end portion of the first link so as to be pivotable, and another end portion that supports a travel wheel; a first hydraulic cylinder capable of changing a swing posture of the first link; and a second hydraulic cylinder capable of changing a swing posture of the second link relative to the first link. The action of the first hydraulic cylinder is controlled such that a swing position of the first link is located at a target position, based on the result of detection performed by a position detection sensor, and the action of the second hydraulic cylinder is controlled such that thrust has a target value, based on the results of detection performed by pressure sensors.

Abstract: In a riding work vehicle, power of an engine is transmitted to a traveling wheel via a horizontally oriented transmission shaft and a vertically oriented transmission shaft. The traveling wheel is supported to be changeable in direction about a rotational axis of the vertically oriented transmission shaft. Each of the vertically oriented transmission shaft and a vertically oriented transmission case is provided as an inner/outer double structure expandable/contractible in association with sliding movement thereof. The vertically oriented transmission case is supported to be pivotable together with the traveling wheel. There is provided a vehicle height adjustment mechanism capable of switching, in a plurality of steps, a relative height of the traveling wheel relative to a vehicle body frame.

Abstract: A work vehicle includes a vehicle body, a plurality of traveling devices disposed on the right and left sides on the front and rear sides of the vehicle body respectively, a plurality of bending link mechanisms configured to liftably support each one of the traveling devices to the vehicle body and a plurality of drive operating devices capable of changing the posture of each one of the plurality of bending link mechanisms. The vehicle body is split into a front side body section and a rear side body section. The front side body section and the rear side body section are configured to be bendably pivotable relative to each other via a pivot interlocking mechanism.

Abstract: A work vehicle includes a vehicle body, a plurality of traveling devices for driving traveling, a plurality of bending link mechanisms supporting the plurality of traveling devices to the vehicle body with allowing the plurality of traveling devices to be elevated/lowered independently of each other, a driving mechanism capable of changing respective postures of the plurality of bending link mechanisms independently of each other, and an idle wheel freely rotatably supported to an intermediate bending portion of each one of the plurality of bending mechanisms.

Abstract: A work vehicle includes a plurality of traveling devices for driving traveling, a plurality of articulated link mechanisms having at least two or more joints and supporting the plurality of traveling devices to a vehicle body, with allowing the plurality of traveling devices to be elevated/lowered independently of each other, a driving mechanism capable of changing respective postures of the plurality of articulated link mechanisms independently of each other, and a plurality of turning mechanisms configured to support the respective plurality of the articulated link mechanisms, with allowing the link mechanisms to be orientation-changeable about a vertical axis.

Abstract: A work vehicle includes: a vehicle body; a plurality of traveling devices located on both right and left sides of the vehicle body; a plurality of bending link mechanisms that support the respective traveling devices on the vehicle body such that the traveling devices can be individually raised or lowered; and a plurality of drive mechanisms capable of individually changing the posture of the bending link mechanisms. The drive mechanisms change the posture of the bending link mechanisms while maintaining a state in which intermediate bending portions of the bending link mechanisms bend toward an intermediate side in a front-rear direction of the vehicle body.

Abstract: A transmission apparatus for a tractor is operable to transmit a forward drive force in a wide speed changing range to the traveling device and which is operable also to transmit a reverse drive force to the traveling device. A planetary transmission section is configured to output the forward drive force in whichever case a hydrostatic stepless speed changing section is speed-changed to a forward rotation speed change state or a reverse rotation speed change state. A low speed transmission clutch couples a low speed side speed changing gear to a counter shaft to be rotatable therewith. A high speed transmission clutch couples a high speed side speed changing gear to the counter shaft to be rotatable therewith. A reverse transmission clutch couples a reverse transmission gear to an output shaft to be rotatable therewith.