To provide a transmission gear for travelling of a tractor that is configured so that input power is converted into high-speed power and low-speed power by a high/low speed switching unit and is converted into forward movement power and backward movement power by a forward/backward movement switching unit and then inputted to a speed changer, which is configured to be able to suppress power loss caused by a lubricant while allowing the lubricant to easily reach the high/low speed switching unit and the forward/backward movement switching unit.SOLUTION: A high speed-change route 33 and a low speed-change route 32 of a high/low speed-switching gear 20A are provided across a transmission-gear input shaft 18 and a rotation-transmission shaft 31. A forward movement conversion route 42 and backward movement conversion route 41 of the forward/backward movement switching gear 20B are provided across a relay shaft 40 interlocked and connected to an input shaft 60 of a speed changer 20C and the rotation-transmission shaft 31. A high speed-side clutch 39 and low speed-side clutch 36 of the high/low speed switching device 20A, and a forward movement-side clutch 49 and a backward movement-side clutch 46 of the forward/backward movement switching device 20B are respectively attached to the rotation-transmission shaft 31.SELECTED DRAWING: Figure 3
【課題】入力された動力が高低速切換え装置によって高速動力と低速動力とに変速され、かつ、前後進切換え装置によって前進動力と後進動力とに変換されて変速装置に入力されるトラクタの走行用伝動装置において、高低速切換え装置及び前後進切換え装置に潤滑油を届き易くしつつ潤滑油による動力損失を抑制できるようにする。【解決手段】高低速切換え装置20Aの高速変速経路33及び低速変速経路32は、伝動装置入力軸18と回転伝動軸31とにわたって設けられている。前後進切換え装置20Bの前進変換経路42及び後進変換経路41は、変速装置20Cの入力軸60に連動連結された中継軸40と、回転伝動軸31とにわたって設けられている。高低速切換え装置20Aの高速側クラッチ39及び低速側クラッチ36、前後進切換え装置20Bの前進側クラッチ49及び後進側クラッチ46のそれぞれは、回転伝動軸31に装着されている。【選択図】図3
TRANSMISSION GEAR FOR TRAVELLING OF TRACTOR AND TRACTOR EQUIPPED WITH THE TRANSMISSION GEAR FOR TRAVELLING OF TRACTOR
トラクタの走行用伝動装置とこのトラクタの走行用伝動装置を備えたトラクタ
2020-03-12
Patent
Electronic Resource
Japanese
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