TRAVEL VEHICLE FOR WORK

• Main Author: SUYAMA TOMONORI
• Format: Patent
• Language: English; Japanese
• Published: 17.03.2016
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BLASTING; BRAKES; CLUTCHES; COUPLINGS FOR TRANSMITTING ROTATION; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

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