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EP-4737177-A1 - WORK VEHICLE

EP4737177A1EP 4737177 A1EP4737177 A1EP 4737177A1EP-4737177-A1

Abstract

A work vehicle 10 includes: a vehicle body 11; a tank unit 21 including a tank 13 configured to store hydrogen gas, the tank unit 21 being disposed above the vehicle body 11; a fuel cell installed on the vehicle body 11; and a pipe 22 for hydrogen gas, the pipe 22 connecting the tank 13 and the fuel cell. The tank unit 21 has a pipe region 23 where the pipe 22 connected to the tank 13 passes, the pipe region 23 being located in a lower portion 21b of the tank unit 21.

Inventors

  • HORIIKE, Kohei

Assignees

  • Kubota Corporation

Dates

Publication Date
20260506
Application Date
20240514

Claims (11)

  1. A work vehicle comprising: a vehicle body; a tank unit including a tank configured to store hydrogen gas, the tank unit being disposed above the vehicle body; a fuel cell installed on the vehicle body; and a pipe for hydrogen gas, the pipe connecting the tank and the fuel cell, wherein the tank unit has a pipe region where the pipe connected to the tank passes, the pipe region being located in a lower portion of the tank unit.
  2. The work vehicle according to claim 1, comprising a front pipe, as the pipe, connected to the fuel cell via the pipe region in the lower portion and a front portion of the tank unit.
  3. The work vehicle according to claim 1 or 2, comprising: a filling unit; and a rear pipe connected to the filling unit via the pipe region in the lower portion and a rear portion of the tank unit.
  4. The work vehicle according to claim 2, wherein the vehicle body includes a cover covering an installed component located near a front of the vehicle body, and the cover has an opening through which the front pipe passes.
  5. The work vehicle according to any one of claims 1 to 4, comprising an installation frame with which the tank unit is installed on the vehicle body, wherein the installation frame includes a frame member having a pillar shape, and the pipe is attached along a part of the frame member.
  6. The work vehicle according to claim 5, comprising a clamp member with which the pipe is fixed to a part of the frame member.
  7. The work vehicle according to claim 5, wherein the frame member is a tubular member that is hollow, and at least a part of the pipe passes through the tubular member.
  8. The work vehicle according to claim 3, comprising a frame coupled to the vehicle body, wherein the frame includes: a clamp member with which the rear pipe is attached to a part of the frame; and an attachment portion to which the filling unit is attached.
  9. The work vehicle according to claim 8, wherein the frame is a part of an installation frame with which the tank is installed on the vehicle body.
  10. The work vehicle according to any one of claims 1 to 9, wherein the pipe includes a flexible pipe as a part of the pipe.
  11. The work vehicle according to any one of claims 1 to 10, comprising: a filling unit for hydrogen gas, the filling unit being located rearward of the tank; the fuel cell located forward of the tank; a rear pipe connecting the filling unit and the tank; and a front pipe connecting the tank and the fuel cell, wherein the pipe region for the rear pipe is located on a first side in a vehicle-width direction, and the pipe region for the front pipe is located on a second side in the vehicle-width direction.

Description

TECHNICAL FIELD The present invention relates to a work vehicle. The present application claims priority to Japanese Patent Application No. 2023-107681 filed on June 30, 2023, the entire disclosure of which is hereby incorporated by reference. BACKGROUND ART Patent Literature 1 discloses a work vehicle including a tank configured to store hydrogen gas, a fuel cell, and a motor. The fuel cell generates electric power from the hydrogen gas supplied from the tank, and the motor rotates using the electric power. The work vehicle travels using the torque from the motor as a driving force. CITATION LIST [PATENT LITERATURE] PATENT LITERATURE 1: Japanese Laid-Open Patent Publication No. 2023-13186 SUMMARY OF THE INVENTION A work vehicle according to an aspect of the present disclosure includes: a vehicle body; a tank unit including a tank configured to store hydrogen gas, the tank unit being disposed above the vehicle body; a fuel cell installed on the vehicle body; and a pipe for hydrogen gas, the pipe connecting the tank and the fuel cell, and the tank unit has a pipe region where the pipe connected to the tank passes, the pipe region being located in a lower portion of the tank unit. BRIEF DESCRIPTION OF DRAWINGS [FIG. 1] FIG. 1 is a perspective view illustrating a work vehicle according to an embodiment of the present disclosure.[FIG. 2] FIG. 2 is a front view of the work vehicle illustrated in FIG. 1.[FIG. 3] FIG. 3 is a rear view of the work vehicle illustrated in FIG. 1.[FIG. 4] FIG. 4 is a side view of the work vehicle illustrated in FIG. 1.[FIG. 5] FIG. 5 is a side view of the work vehicle illustrated in FIG. 1.[FIG. 6] FIG. 6 is a plan view of the work vehicle illustrated in FIG. 1.[FIG. 7] FIG. 7 is a bottom view of the work vehicle illustrated in FIG. 1.[FIG. 8] FIG. 8 is a partially exploded perspective view of the work vehicle illustrated in FIG. 1.[FIG. 9] FIG. 9 is a side view of the work vehicle from which a hood and the like are removed.[FIG. 10] FIG. 10 is a perspective view of a vehicle body from which a right rear wheel is removed.[FIG. 11] FIG. 11 is a side view of the work vehicle illustrated in FIG. 5, from which a rear wheel and a front frame portion are removed.[FIG. 12] FIG. 12 is an explanatory view of a filling unit attached to a bracket and its surroundings.[FIG. 13] FIG. 13 is an explanatory view of a fuel cell and a discharge path.[FIG. 14] FIG. 14 is a perspective view of a battery unit and a discharge pipe supported by a support structure.[FIG. 15] FIG. 15 is an exploded perspective view of the battery unit, the discharge pipe, and the support structure.[FIG. 16] FIG. 16 is a front view of the battery unit and the discharge pipe supported by the support structure.[FIG. 17] FIG. 17 is a front view illustrating the support structure and the battery unit separated from the support structure. DETAILED DESCRIPTION <Problems to be solved by the present disclosure> A tank configured to store hydrogen gas is disposed above a vehicle body. A fuel cell and an installed component for hydrogen, such as a filling port, for filling hydrogen gas are installed on the vehicle body. The tank and the installed component for hydrogen are connected to each other using a pipe. The pipe is preferably short in length as much as possible. Hence, an object of the present disclosure is to provide a work vehicle that enables a reduction in length of a pipe as much as possible, the pipe being connected to a tank configured to store hydrogen gas. <Advantageous effect of the present disclosure> According to a work vehicle of the present disclosure, it is possible to reduce a length of a pipe for hydrogen gas as much as possible. <Outline of embodiments of the present disclosure> An outline of below-listed embodiments of the present disclosure is described. (1) A work vehicle of the present embodiment includes: a vehicle body; a tank unit including a tank configured to store hydrogen gas, the tank unit being disposed above the vehicle body; a fuel cell installed on the vehicle body; and a pipe for hydrogen gas, the pipe connecting the tank and the fuel cell, and the tank unit has a pipe region where the pipe connected to the tank passes, the pipe region being located in a lower portion of the tank unit. According to the work vehicle having this configuration, the tank unit is disposed above the vehicle body. The pipe region is located in the lower portion of the tank unit. It is possible to bring the pipe region in the tank unit close to the fuel cell on the vehicle body as much as possible, thereby reducing the length of the pipe for hydrogen gas as much as possible.(2) Preferably, the work vehicle includes a front pipe, as the pipe, connected to the fuel cell via the pipe region in the lower portion and a front portion of the tank unit. According to this configuration, it is possible to reduce the length of the front pipe connecting the tank and the fuel cell, as much as possible.(3) Preferably, the work vehicl