Change gears device of construction vehicle

摘要

(57) Abstract Objective To miniaturize the change gears device, at the same time constant speed control and automatic operation varyingChange manipulation of fast control is made easy. Constitution In variable capacity motor 6 control shirin for speed controlda to provide with the solenoid valve 11 for 1 and control cylinder operation, yesIn operation pipe conduit 12A of transfiguration quantitative motor 6 and 12B hydraulic suitsuProviding chi PSA and PSB, load in the midst of 2nd speed run increasing, the workWhen oil pressure of industry pipe conduit 12A and 12B rises, hydraulic suitsuchi 12A and 12B solenoid valve 11 change control cylinderVariable capacity motor 6 is changed to 1st speed. Constant speed control and change gears systemThe switch which is changed establishes to the shifter.