PROBLEM TO BE SOLVED: To reduce the size of a transmission case or the like by devising a gear transmission mechanism provided in a space from a first claw shaft to a second claw shaft with a rotary tilling claw rotated in the reverse direction.SOLUTION: A tilling claw shaft 20 is constituted by the first claw shaft 40 to which driving force is transmitted from the transmission left side through a transmission chain 36 and a pair of right and left second claw shafts to which driving force is transmitted from the first claw shaft 40 through the gear transmission mechanism 60. The tilling working vehicle includes the gear transmission mechanism 60, a first intermediate shaft 61 for reversing the power input to the first claw shaft 40, a second intermediate shaft 62 provided with a pair of transmission gears 65 and 65 for transmitting the reversed power transmitted from the first intermediate shaft 61 to the respective input gears 53 of the right and left second claw shafts, wherein the first intermediate shaft 61 or the second intermediate shaft 62 is pivoted in the transmission case 3 through a winding area S of the transmission chain 36.COPYRIGHT: (C)2012,JPO&INPIT【課題】第1爪軸とは逆方向に回転するロータリ耕耘爪を装着した第2爪軸との間に設けられるギヤ伝動機構を工夫して、伝動ケース等の小型化を図る。【解決手段】耕耘爪軸20を、伝動上手側から伝動チェーン36を介して駆動力が伝達される第1爪軸40と、第1爪軸40からギヤ伝動機構60を介して駆動力が伝えられる左右一対の第2爪軸とで構成し、ギヤ伝動機構60、第1爪軸40に入力された動力を逆転する第1中間軸61と、その第1中間軸61から伝えられた逆転動力を左右の第2爪軸の各入力ギヤ53に伝達する一対の伝動ギヤ65,65を装着した第2中間軸62とを備え、第1中間軸61又は第2中間軸62を、伝動チェーン36の巻回領域S内を通して伝動ケース3に枢支してある。【選択図】図5
