Battery forklift circuit

Battery forklifts are a stacking and handling tool commonly used in stations, docks, warehouses, and general factories.
    The picture shows the appearance and electrical control circuit of the It battery forklift. Circle '2-18b shows the It battery forklift electrical control circuit composed of batteries connected in series
. GB is a 30V DC power supply composed of batteries connected in series. Motor M1 is a traveling motor, which is a two-speed series motor
that drives the shovel forward or backward through a set of gear transmission mechanisms. Motor M2 is also a tandem motor , used to drive the high-pressure oil pump and deliver high-pressure oil
to the hydraulic system to control the lifting and lowering of the fork.
    Sl is the electric lock switch , S2 is the direction switch, and soi is the foot switch. s02 is the speed controller pedal. When starting and adjusting the speed of the forklift
, close the electric lock switch SL. At this time, the power indicator light HL lights up, indicating that the power supply has been connected to the circuit and is ready for power supply.
    Turn the handle of direction switch S2 to the required direction, that is, the forward or backward position of the forklift. Release the handbrake handle and release the foot brake
to reset the foot switch soi and close it. Then lightly step on the pedal of the speed controller SQ2 to make its moving contact contact the static contact "0",
causing the entire Mace switch S3 is closed.