PROBLEM TO BE SOLVED: To provide a work vehicle which improves the durability of a travel transmission shaft equipped with a suspension mechanism and a travel transmission case installed with the travel transmission shaft.SOLUTION: In a travel transmission case 100 composed of an upper case 110 and a lower case 120, a travel transmission shaft 10 having a suspension mechanism 130 vertically moving a front wheel 21 is equipped. A washer 23 is provided on an upper part of the upper case 110, and an upper cover 24 is provided on an upper surface of the upper case 110. When the travel transmission shaft 10 moves upward, the washer 23 and the upper cover 24 contact with each other to regulate the upward movement of the travel transmission shaft 10, and when the travel transmission shaft 10 moves upward, a lower end of the upper case 110 is contacted with a receiving member 112 provided at an upper end of the lower case 120 to regulate the upward movement of the travel transmission shaft 10. Therefore, a load applied on the upper case 110, the lower case 120, the washer 23, the upper cover 24, and the travel transmission shaft 10 is reduced, and the durability of the travel transmission case 100 is improved.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2017,JPO&INPIT【課題】サスペンション機構を備えた走行伝動軸と該走行伝動軸を装着した走行伝動ケースの耐久性を従来より高めた作業車両を提供すること。【解決手段】上部ケース110と下部ケース120からなる走行伝動ケース100内に、前輪21を上下動させるサスペンション機構130を有する走行伝動軸10を備え、上部ケース110の上部に座金23と上部ケース110の上面に上部カバー24を設け、走行伝動軸10が上方移動すると、座金23と上部カバー24が接触して走行伝動軸10の上方移動を規制し、走行伝動軸10が上方移動すると、下部ケース120の上端に設けた受け部材112に上部ケース110の下端が接触して走行伝動軸10の上方移動を規制する構成を備えているので、上部ケース110、下部ケース120、座金23、上部カバー24及び走行伝動軸10にかかる負荷が軽減され、走行伝動ケース100の耐久性が向上する。【選択図】図3
