EP-4737161-A1 - WORK VEHICLE

Abstract

A work vehicle includes a hydraulic device (C) and a battery (10A). The battery (10A) is held by a lower portion of a body (3), below the hydraulic device (C) and between right and left travel devices.

Inventors

• ISHIKAWA, JUNICHI
• HIRAOKA, MINORU
• YAMANAKA, YUKIFUMI
• YOSHII, Kaichiro
• IDA, YUSUKE
• HAZAWA, Yuhei
• JINNOUCHI, Katsutoshi
• NIKI, Ryota
• YAMAGISHI, RYOTA

Assignees

• Kubota Corporation

Dates

Publication Date

20260506

Application Date

20240618

Claims (9)

1. A work vehicle, comprising: right and left travel devices disposed on right and left sides of a body of the work vehicle; a hydraulic device; and a battery held by a lower portion of the body, below the hydraulic device and between the right and left travel devices.
2. The work vehicle according to claim 1, wherein the hydraulic device includes a hydraulic pump, the work vehicle further comprises an electric motor configured to drive the hydraulic pump, and the hydraulic pump and the electric motor are disposed right above the battery.
3. The work vehicle according to claim 2, wherein the electric motor includes an attachment plate and is held by the body by the attachment plate being coupled to a stay provided in the body, and the hydraulic pump is attached to the attachment plate and held by the body.
4. The work vehicle according to claim 2 or 3, further comprising: an inverter disposed above the battery and connected to the electric motor.
5. The work vehicle according to claim 4, further comprising: a protection circuit section for the inverter, disposed above the battery.
6. The work vehicle according to any one of claims 1 to 5, further comprising: a charger provided in the body and capable of charging the battery with electric power supplied from an external device provided outside the body.
7. The work vehicle according to any one of claims 1 to 6, further comprising: guide rails provided in the body and extending in a front-rear direction of the body over a battery storage space in the body and a battery loading-unloading opening of the body, the guide rails allowing the battery to move between the battery storage space and the battery loading-unloading opening.
8. The work vehicle according to claim 7, further comprising: an oil cooler disposed rearward of the battery storage space in the front-rear direction of the body, wherein the battery loading-unloading opening is disposed forward of the battery storage space in the front-rear direction of the body.
9. The work vehicle according to any one of claims 1 to 8, wherein each of the right and left travel devices includes a front wheel and a rear wheel, and the front wheel and the rear wheel are held by the body while the front wheel and the rear wheel are independently liftable and lowerable relative to the body.

Description

Technical Field The present invention relates to a work vehicle. Background Art Patent Literature 1 discloses a work vehicle including travel devices (traveling wheels) disposed on right and left sides of a body (a body frame) of the work vehicle, and a hydraulic device (a hydraulic pump of a hydraulic pressure supply source). Citation List Patent Literature Patent Literature 1: Japanese Unexamined Patent Application Publication No. 2023-768 Summary of Invention Technical Problem When a work vehicle includes an engine, exhaust gases are emitted from the engine. The exhaust gases may accumulate in enclosed spaces like vinyl greenhouses. There is a demand for work vehicles capable of operating in conditions where engine exhaust gases are not emitted, or where the amount of exhaust emissions is minimized even if exhaust gases are emitted. The present invention provides a work vehicle which allows operation in conditions where exhaust gases are not emitted, or where the amount of exhaust emissions is minimized even if exhaust gases are emitted, and which can easily perform operations. Solution to Problem A work vehicle according to the present invention includes: right and left travel devices disposed on right and left sides of a body of the work vehicle; a hydraulic device; and a battery held by a lower portion of the body, below the hydraulic device and between the right and left travel devices. In this configuration, the work vehicle can adopt a power source driven by electric power supplied from the battery. Hereby, the work vehicle does not require an engine and can operate with no emission of exhaust gases. Even in a case where the work vehicle includes an engine in addition to the power source driven by electric power, the engine can be a small engine in comparison with a case where the work vehicle includes only an engine. This allows the work vehicle to operate with a small amount of exhaust emissions even if exhaust gases are emitted. Since the battery is held by the lower portion of the body, below the hydraulic device and between right and left travel devices, the work vehicle can have a center of gravity at a low position, between right and left contact points with the ground in a plan view, so that the work vehicle can travel easily and stably even on uneven ground and can operate easily. In the present invention, the hydraulic device may include a hydraulic pump, the work vehicle may further include an electric motor configured to drive the hydraulic pump, and the hydraulic pump and the electric motor may be disposed right above the battery. In this configuration, the hydraulic pump and the electric motor can be disposed not to protrude outside the body beyond an area where the battery is located in a plan view. This allows the hydraulic pump, the electric motor, and the battery to be disposed collectively in a plan view. In the present invention, the electric motor may include an attachment plate and may be held by the body by the attachment plate being coupled to a stay provided in the body, and the hydraulic pump may be attached to the attachment plate and held by the body. In this configuration, the electric motor includes the attachment plate, which is more easily coupled to a stay than a body of the electric motor, and the electric motor is held by the body of the work vehicle by coupling the attachment plate to the stay. Hereby, the electric motor can be easily attached to the body. Since the attachment plate is used as a stay to which the hydraulic pump is attached, it is not necessary to provide an extra stay for the hydraulic pump, thereby achieving a reduction in cost. In the present invention, the work vehicle may further include an inverter disposed above the battery and connected to the electric motor. In this configuration, operations such as inspection of the inverter can be performed above the battery, so that maintenance on the inverter is easily performable. In the present invention, the work vehicle may further include a protection circuit section for the inverter, disposed above the battery. In this configuration, operations such as inspection of the protection circuit section can be performed above the battery, so that maintenance on the protection circuit section is easily performable. In the present invention, the work vehicle may further include a charger provided in the body and capable of charging the battery with electric power supplied from an external device provided outside the body. In this configuration, in response to electric power being supplied to the charger from an external device provided outside the body, the battery is charged by the charger. As a result, the battery can be easily charged while the battery remains held by the body. This achieves easy charging of the battery. In the present invention, the work vehicle may further include guide rails provided in the body and extending in a front-rear direction of the body over a battery storage space in the