BRAKE DEVICE OF WORKING VEHICLE

PROBLEM TO BE SOLVED: To expand range from a full opening of a bypassing oil passage to a stopped state of a valve element of a variable throttle valve by a method wherein the brake pedal is cooperatively connected in such a way that a slant plate of a hydraulic pump is returned back to its neutral...

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Bibliographic Details
Main Authors MUKODA TOSHIO, SUNADA MOTOTAKE
Format Patent
LanguageEnglish
Published 26.08.1997
Edition6
Subjects
ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL
BLASTING
BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL
ENGINEERING ELEMENTS AND UNITS
GEARING
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
PERFORMING OPERATIONS
PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES
THERMAL INSULATION IN GENERAL
TRANSPORTING
VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF
VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
VEHICLES IN GENERAL
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To expand range from a full opening of a bypassing oil passage to a stopped state of a valve element of a variable throttle valve by a method wherein the brake pedal is cooperatively connected in such a way that a slant plate of a hydraulic pump is returned back to its neutral position under a striding operation of a brake pedal and the brake can be depressed even after the operation can not be performed. SOLUTION: A variable throttle valve 25 has communication holes communicating with a bypassing oil passage 24 formed to be crossed to each other, and then the communication holes may shield the bypassing oil passage 24. As a valve element is turned around its axis, a degree where the bypassing oil passage 24 is communicated with the communication holes is increased, resulting in that a slant plate angle of a hydraulic pump 15 is decreased, its speed is decreased without reducing the rotation of the engine and then the swash plate of the hydraulic pump 15 occupies its neutral position. A coil spring is compressed when a traveling brake is not completely effected unless a brake pedal 56 is depressed after an inching lever reaches its stopped position. With such an arrangement as above, it is possible to perform a depressing operation of the brake pedal and to perform an easy adjustment in operation or to prevent poor adjustment from being carried out.
Bibliography:Application Number: JP19960032334