US 12,168,376 B2
Work vehicle
Takahiro Yamashina, Kagawa (JP)
Assigned to TADANO LTD., Kagawa (JP)
Filed by TADANO LTD., Kagawa (JP)
Filed on Feb. 13, 2024, as Appl. No. 18/440,114.
Claims priority of application No. 2023-021790 (JP), filed on Feb. 15, 2023.
Prior Publication US 2024/0270039 A1, Aug. 15, 2024
Int. Cl. B60G 17/015 (2006.01)
CPC B60G 17/0152 (2013.01) [B60G 2202/152 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A work vehicle comprising:
a shaft on which a wheel is rotatably mounted;
a suspension device that has a shaft support unit that supports the shaft, and an air suspension that is interposed between the shaft support unit and a vehicle body and is switchable between an exhaust state in which air inside is exhausted and the air suspension retracts, and a leveling state in which air is supplied inside and the air suspension extends longer than the exhaust state;
a locking member that is movable between a locked position that restricts an extension action of the air suspension in the exhaust state and an unlocked position that allows the extension action of the air suspension in the exhaust state;
an outrigger device that is movable between a ground contact position where the outrigger device contacts the ground and supports the vehicle body and a housing position where the outrigger device is housed in the vehicle body; and
a control unit that includes at least one circuit that controls actions of at least the air suspension, the locking member, and the outrigger device, wherein
the control unit restricts a movement of the outrigger device to a ground contact position in a state where the air suspension is in the exhaust state and the locking member is not in the locked position, and allows a movement of the outrigger device to the ground contact position in a state where the air suspension is in the exhaust state and the locking member is in the locked position.