| 摘要 |
PURPOSE:In a tractor having a spacer mission to be used selectively, to shorten the length of the transmission case by constituting such that the spacer mission case is inserted into a front and rear transmission cases. CONSTITUTION:When requiring a multi-stage speed change, and a two stage speed change mechanism 15 is placed between the first and third stage speed change mechanisms 3 and 4, a front mission case 11 having open rear end and equipped with the first stage speed change mechanism 3 and a rear mission case 12 having open front end and equipped with the third stage speed change mechanism 4 are coupled integrally through a fixing flange 14 formed at the outercircumference of a third mission case 1 equipped with the second speed change mechanism 5. The rear sections of a first speed change shaft 17 and a first counter shaft 20 are supported by the bearings 19, 21 to the front section wall 13a of the case 13. A rear cover 27 is fixed to the rear section of the case 13 then the second speed change shaft 24 and the second counter shaft 28 are supported by said cover 27. |
