Ⅲ. Construction, principle, adjustment and maintenance of
forklift trucks
1. Drive system
1.1 General description
The drive system consists of general transmission system and partial brake system.
With the front wheel duplex motor driving construction, the right and left front wheel
separately contain drive axle, transmission case, brake unit and drive motor, which
improves the working efficiency. The reducer and the brake unit assembled in the drive
axle housing forms a unit.
The travel speed of the truck is increased with the speed of traveling motor, while the
travel direction changes with the rotation direction of traveling motor. The sensor
assembled on the rear wheel sends the information to the controller which controls the
driving motor on the front wheels, with the different information accepted, the driving motor
transfers the different rotation, then the truck can be turned. The steering of the front wheel
is come out by the electrical differential, which instead of the differential composed of bevel
gear. With the system, the efficiency can be improved and the noise when the bevel motor
drives can be eliminated.
1.1.1 Reduction box
The reduction box consists of case housing, reduction device, brake friction device,
case cover and wheel axle. The outer housing and case cover are of cast construction. The
reducer device and brake friction device are assembled in the case body which is
combined of reducer outer housing and case cover. The power is transmitted to the wheel
axle through the transmission, drawing the rotation of front wheel. The reducer is fixed on
the joint plate of frame with 7 bolts. See the construction in Fig.1-1.
The parts of the drawing:
6.Tappered roller
bearing
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