公开(公告)号：US11268614B2

公开(公告)日：2022-03-08

申请号：US16893491

申请日：2020-06-05

Applicant: KUBOTA CORPORATION

Inventor： Yoshihiko Kuroshita ,  Tetsuo Yamaguchi ,  Michita Kono ,  Hitoshi Azuma ,  Shinji Ohara

IPC: F16H61/16 ,  B60K17/02 ,  F16H59/54 ,  F16H61/21

Abstract: A working vehicle includes a traveling clutch to be switched between an engaging state and a disengaging state, a brake to brake the traveling device according to an operation of a brake operator, and a controller to perform a braking control to perform the braking, and an auto-switching controller to switch the traveling clutch from the engaging state to the disengaging state. The controller performs a first processing to switch the traveling clutch from the engaging state to the disengaging state when the brake operator is operated in a case where the auto-switching control is valid and a vehicle speed is less than a threshold, and a second processing to prevent the traveling clutch from being switched from the engaging state to the disengaging state even when the brake operator is operated in a case where the vehicle speed is equal to or higher than the threshold.

公开(公告)号：US11248668B2

公开(公告)日：2022-02-15

申请号：US16950328

申请日：2020-11-17

Applicant: KUBOTA CORPORATION

Inventor： Hitoshi Azuma ,  Tetsuo Yamaguchi ,  Shinji Ohara

IPC: F16D48/06 ,  F16H61/06 ,  B60K23/08

Abstract: A working vehicle includes a first hydraulic clutch connected to the first traveling shaft, a second hydraulic clutch connected to the first traveling shaft separately from the first hydraulic clutch, a first gear mechanism to transmit, to a second traveling shaft, power from the first hydraulic clutch when the first hydraulic clutch is engaged and not to transmit, to the second traveling shaft, power from the first hydraulic clutch when the first hydraulic clutch is disengaged, and a second gear mechanism to transmit, to the second traveling shaft, power from the second hydraulic clutch when the second hydraulic clutch is engaged and not to transmit, to the second traveling shaft, power from the second hydraulic clutch when the second hydraulic clutch is disengaged.

公开(公告)号：US11247557B2

公开(公告)日：2022-02-15

申请号：US16893490

申请日：2020-06-05

Applicant: KUBOTA CORPORATION

Inventor： Hitoshi Azuma ,  Tetsuo Yamaguchi ,  Shinji Ohara ,  Yoshihiko Kuroshita ,  Michita Kono

IPC: B60K17/28 ,  B60K17/02 ,  B60K17/10 ,  F16D67/04 ,  B60K25/06

Abstract: A working vehicle includes a PTO shaft to transmit power of a propulsion shaft, a PTO clutch including a first rotor to be rotated by the power of the propulsion shaft, a second rotor to transmit the power to the PTO shaft, a press to be moved by a pressure of operation fluid between an engaging side on which the first rotor is engaged with the second rotor and a disengaging side, and a PTO brake to brake the PTO shaft when the press is positioned on the disengaging side, a control valve to control the pressure of the operation fluid to be applied to the PTO clutch, a rate setter to set a reducing rate at which the pressure of the operation fluid is reduced, and a controller to control the control valve based on the reducing rate.