WORK VEHICLE

To provide a work vehicle that is able to operate a parking brake both manually and automatically with a simple configuration.SOLUTION: A parking brake 71 is a negative brake and is configured such that a rotating body that rotates during traveling is braked by urging force of a brake spring 72 and...

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Bibliographische Detailangaben
Hauptverfasser:	KISODA TAKEHARU, NORITA SEIJI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	AGRICULTURE ANIMAL HUSBANDRY ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL 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 BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL FISHING FORESTRY HARVESTING HUMAN NECESSITIES HUNTING INSTRUMENTATION OR DASHBOARDS FOR VEHICLES MOWING PERFORMING OPERATIONS PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES TRANSPORTING TRAPPING VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	To provide a work vehicle that is able to operate a parking brake both manually and automatically with a simple configuration.SOLUTION: A parking brake 71 is a negative brake and is configured such that a rotating body that rotates during traveling is braked by urging force of a brake spring 72 and the brake is released by hydraulic pressure. A solenoid valve 75 that switches between a state of permitting supply of hydraulic pressure and a state of blocking supply of hydraulic pressure is interposed in a brake oil passage 74 that supplies the parking brake 71 with hydraulic pressure for releasing a brake. A manual valve 76 for switching between a state of manually permitting supply of hydraulic pressure and a state of blocking supply of hydraulic pressure is interposed in the brake oil passage 74 that supplies the parking brake 71 with hydraulic pressure for releasing a brake.SELECTED DRAWING: Figure 3 【課題】簡素な構成で、駐車ブレーキを手動および自動の両方で作動させることができる、作業車両を提供する。【解決手段】駐車ブレーキ７１は、ネガティブブレーキであり、走行時に回転する回転体をブレーキばね７２の付勢力により制動し、その制動を油圧により解除する構成である。駐車ブレーキ７１に制動解除のための油圧を供給するブレーキ油路７４には、油圧の供給を許容する状態と油圧の供給を阻止する状態とに切り替わる電磁弁７５が介装されている。また、駐車ブレーキ７１に制動解除のための油圧を供給するブレーキ油路７４には、手動により油圧の供給を許容する状態と油圧の供給を阻止する状態とに切り替わる手動弁７６が介装されている。【選択図】図３