PROBLEM TO BE SOLVED: To lock rotation of a front wheel in parking brake time, even when using a first front wheel clutch and a second front wheel clutch as a positive hydraulic clutch.SOLUTION: A constant velocity power transmission passage 19 and an increase speed power transmission passage 20 are constituted in parallel in a front wheel power transmission passage 10, and a two-wheel drive state of not driving a front wheel 4, a four-wheel drive state of driving the front wheel 4 in substantially constant velocity with a rear wheel 5 and a front wheel increase speed drive state of driving the front wheel 4 in an increase speed more than the rear wheel 5, are revealed by selective input/cut of front wheel clutches 23 and 26 (a positive hydraulic clutch) respectively interposed in the constant velocity power transmission passage 19 and the increase speed power transmission passage 20, and a third front wheel clutch 27 constituted in parallel to the front wheel clutches 23 and 26 are also provided, and the third front wheel clutch 27 becomes input in response to operation of a linking parking brake lever 33, and rotation of the front wheel 4 is locked by braking force of a rear wheel brake.SELECTED DRAWING: Figure 2

    【課題】第1前輪クラッチ及び第2前輪クラッチをポジティブ油圧クラッチとした場合であっても、駐車ブレーキ時に前輪の回転をロック可能とする。【解決手段】前輪動力伝動経路10に等速動力伝動経路19と増速動力伝動経路20とを並列に構成するとともに、等速動力伝動経路19及び増速動力伝動経路20に、それぞれ介設される前輪クラッチ23、26(ポジティブ油圧クラッチ)の選択的な入り/切りにより、前輪4を駆動させない2輪駆動状態と、前輪4を後輪5と略等速で駆動させる4輪駆動状態と、前輪4を後輪5よりも増速駆動させる前輪増速駆動状態とを現出させ、さらに、前輪クラッチ23、26と並列に構成される第3前輪クラッチ27を備え、該第3前輪クラッチ27は、連係される駐車ブレーキレバー33の操作に応じて入りとなり、後輪ブレーキの制動力で前輪4の回転をロックする。【選択図】図2


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    Title :

    TRAVEL VEHICLE FOR WORK


    Additional title:

    作業用走行車


    Contributors:

    Publication date :

    2016-03-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F16D COUPLINGS FOR TRANSMITTING ROTATION , Nicht schaltbare Kupplungen



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