WORK VEHICLE

To solve a conventional problem that, when an amount of lubricating oil, for alleviating abrasion and seizing of a gear, etc., filled in a transmission case is gradually reduced as accumulation of working hours to a level that causes insufficient distribution of the lubricating oil to a PTO shaft an...

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Bibliographic Details
Main Authors UEJIMA NORIHIRO, NAGAI MASATO, MATSUIE SHINICHI, AKAMATSU KATSUTOSHI, NAGAO YASUFUMI
Format Patent
LanguageEnglish
Japanese
Published 05.09.2022
Subjects
BLASTING
ENGINEERING ELEMENTS AND UNITS
GEARING
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
THERMAL INSULATION IN GENERAL
WEAPONS
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Summary:To solve a conventional problem that, when an amount of lubricating oil, for alleviating abrasion and seizing of a gear, etc., filled in a transmission case is gradually reduced as accumulation of working hours to a level that causes insufficient distribution of the lubricating oil to a PTO shaft and a transmission system thereof positioned in an upper section in the transmission case, the insufficiently lubricated PTO shaft, etc. undergoes rotational obstruction and damage due to the abrasion, a reduction in durability and seizing.SOLUTION: A work vehicle comprises: a travel vehicle body 1'; a work device 10 which is mounted on the travel vehicle body 1' and performs work in an agricultural field; a transmission case 20 which transmits travel drive force and work drive force; a hydraulic oil pressure system which supplies hydraulic oil for performance of the work device 10; and a lubricant transfer pipe 90 which recovers the hydraulic oil from the hydraulic oil pressure system and discharges the same into the transmission case 20. A discharge port 79 of the lubricant transfer pipe 90 is positioned above a transmission mechanism 32 of the work drive force arranged in an upper section inside the transmission case 20.SELECTED DRAWING: Figure 14 【課題】 従来、ミッションケース内には、ギヤ等の摩耗や焼け付きを軽減する潤滑油が充填されているが、作業時間の累積と共に少しずつ減少していくと、上方位置にあるＰＴＯ軸、及びその伝動系統に潤滑油が届きにくくなり、潤滑油の不足により摩耗が生じ、耐久性が低下し、焼け付きによりＰＴＯ軸等の回転が妨げられ、破損が生じる問題がある。【解決手段】 走行車体１'と、走行車体１'に搭載され圃場内で作業を行う作業装置１０と、走行駆動力及び作業駆動力を伝動するミッションケース２０と、作業装置１０の作業を作動油により行う作業油圧系統と、作業油圧系統からミッションケース２０内に作動油を戻し排出する潤滑送油管９０とを備え、潤滑送油管９０の排出口７９は、ミッションケース２０の内部の上部側に配置される作業駆動力の伝動機構３２よりも上側に配置されている作業車両。【選択図】 図１４
Bibliography:Application Number: JP20210027140