Pusher axle system of vehicle having auxiliary wheel with caster angle

摘要

PURPOSE: A pusher axle system to be equipped wheel with caster angle is provided to prevent dragging of wheel by following up radius of rotation in an auxiliary wheel with caster angle. CONSTITUTION: A pusher axle system equipped wheel with caster angle comprises a lift air spring(104); a ride air spring(114); an operating device(300). A first relay valve(110) is installed on an air tank(106) and an air pipe line(108). The first relay valve is operated by a pusher axle up/down switch(102). Air inflow of the lift air spring is controlled by the first relay valve. A controller(116) adjusts pneumatic pressure to be supplied to the ride air spring according to load. Inflow of air to the ride air spring is controlled by a second relay valve(112). The ride air spring adjusts height of the pusher axle when the pusher axle is down by the lift air spring. A tail lamp(202) is turned on by an operation of a gear shift lever(200). Electricity is transmitted through an electric line of the tail lamp. Air in the air tank flows through the air pipe line. The operating device adjusts caster angle of an auxiliary wheel by inflowing air of the air tank. Consequently, excessive concentration of load is prevented.