A rice planting machine has a travel vehicle body. The travel vehicle body has a chassis, and the chassis has side frames 9 and 10, a mid frame 11, a front frame 12, and a rear frame 14. A transmission case 27 and a rear axle case 34 serve as a strength member of the travel vehicle body, and the transmission case 27 and the rear axle case 34 are coupled by a lower connection body 36. An engine 26 is supported by a U-shaped engine support 55 having an upward opening, and the engine support 55 is firmly attached to the front side frame 9. Since the engine 26 is arranged in a state in which it settles down below the front side frame 9, a center of gravity of the travel vehicle body 1 becomes low and a stability is high.本發明之插秧機包含行駛車體。行駛車體包含底盤,底盤包含側架9、10、中間架11、前架12、後架14。變速箱27及後車軸箱34亦具有行駛車體之強度構件作用,且變速箱27與後車軸箱34係藉由下部連結體36而連結。引擎26係藉由向上開口之U字形引擎支撐部55來支持,且引擎支撐部55固著於前部側架9。由於引擎26係以下沉至前部側架9之下方之狀態進行配置,故可降低行駛車體1之重心從而使穩定性提高。5...後輪9...前部側架10...後部側架11...中間架13...後架14...後支柱15...向外枝架17...後部橫長撐桿18...吊架型托架18a...托架板19...門型架21...燃料箱23...輔助架26...引擎27...變速箱28...HST29...傳送帶30...張力滑輪31...轉動式臂32...動力轉向單元33...前車軸裝置34...後車軸箱34a...向後伸出部35...橫樑構件36...下部連結體37...補強架38...作為後側構件支持部一例之支撐部39...油壓缸39a...筒體39b...活塞桿40...托架41...後輪驅動軸42...作業動力軸44...機械本體45...散熱器49...飛輪50...輸出滑輪51...消音器52...撐桿54...圓板55...作為前側構件支持部一例之構成引擎支撐部之支撐架56...構成引擎支撐部之框架補強體57...側托架60...上托架62...吸振單元70...後托架71...銷
