US 12,311,769 B2
Work vehicle
Kohei Ono, Sakai (JP)
Assigned to Kubota Corporation, Osaka (JP)
Filed by Kubota Corporation, Osaka (JP)
Filed on Dec. 14, 2023, as Appl. No. 18/540,126.
Claims priority of application No. 2023-000163 (JP), filed on Jan. 4, 2023.
Prior Publication US 2024/0217343 A1, Jul. 4, 2024
Int. Cl. B60L 1/00 (2006.01); A01D 34/64 (2006.01); B60K 1/02 (2006.01); B60K 17/02 (2006.01); B60K 17/28 (2006.01); B60K 25/00 (2006.01); B60K 25/02 (2006.01); B62D 49/06 (2006.01)
CPC B60L 1/00 (2013.01) [B60K 1/02 (2013.01); B60K 17/02 (2013.01); B60K 17/28 (2013.01); B60K 25/00 (2013.01); B62D 49/06 (2013.01); A01D 34/64 (2013.01); B60K 2025/005 (2013.01); B60K 2025/026 (2013.01); B60Y 2200/221 (2013.01); B60Y 2200/223 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A work vehicle comprising:
a travel device supporting a body of the work vehicle in such a manner as to enable the body to travel;
a power take-off shaft configured to output power out from the body;
a travel electric motor configured to drive the travel device;
a work electric motor configured to drive the power take-off shaft to rotate;
a power-transmission-state switching mechanism configured to be switched between (i) an independent power transmission state in which output from the travel electric motor is output to the travel device and in which output from the work electric motor is output to the power take-off shaft, and (ii) a cooperative output power transmission state in which the travel electric motor and the work electric motor are capable of cooperatively outputting power exclusively to a drive target;
wherein, the drive target can be the travel device; and
a control unit configured to control switching of the power-transmission-state switching mechanism,
wherein the power-transmission-state switching mechanism comprises:
a travel clutch mechanism provided in a travel power transmission section between the travel electric motor and the travel device, and configured to be switched between a power transmission state in which power from the travel electric motor is transmitted to the travel device, and a disengaged state in which the transmission of power from the travel electric motor to the travel device is disabled;
a work clutch mechanism provided in a work power transmission section between the work electric motor and the power take-off shaft, and configured to be switched between a power transmission state in which power from the work electric motor is transmitted to the power take-off shaft, and a disengaged state in which the transmission of power from the work electric motor to the power take-off shaft is disabled;
a relay power transmission section configured to transmit power between a portion of the travel power transmission section that is located upstream of the travel clutch mechanism along a power transmission path, and a portion of the work power transmission section that is located upstream of the work clutch mechanism along the power transmission path; and
a relay clutch mechanism configured to be switched between a power transmission state in which power transmission by the relay power transmission section is enabled, and a disengaged state in which the power transmission by the relay power transmission section is disabled, and
wherein the relay clutch mechanism is provided coaxially with the travel clutch mechanism and is arranged upstream of the travel clutch mechanism along the power transmission path.