US 12,069,973 B2
Tractor
Nobuyuki Tanaka, Toyota (JP); and Yuki Sugo, Toyota (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Aichi-Ken (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Aichi-ken (JP)
Filed on Apr. 11, 2022, as Appl. No. 17/717,130.
Claims priority of application No. 2021-073575 (JP), filed on Apr. 23, 2021.
Prior Publication US 2022/0338404 A1, Oct. 27, 2022
Int. Cl. A01B 63/12 (2006.01)
CPC A01B 63/12 (2013.01) 4 Claims
OG exemplary drawing
 
1. A tractor comprising:
a vehicle body;
a work machine connected to the vehicle body;
an elevator mechanism configured to move the work machine up and down;
an electric motor serving as a drive source for the work machine;
a battery configured to supply electric power to the electric motor;
an electric leakage detection circuit configured to detect electric leakage in the battery; and
a control device configured to control the elevator mechanism as a target to be controlled, wherein:
the control device controls the elevator mechanism either in a lowered state or in a raised state, the lowered state being a state where the work machine is placed at a position making contact with a ground, the raised state being a state where the work machine is placed at a position distanced from the ground; and
in a case where the electric leakage detection circuit detects electric leakage in the battery when the elevator mechanism is in the lowered state, the control device performs a state change process of bringing the elevator mechanism into the raised state.