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II. Construction, Principle, Adjustment and Maintenance of Forklift
Trucks
1. Transmission system
1.1 General description
The 5t domestic integrated electrical bridge mainly consists of two reduction box
assemblies, a fully enclosed AC motor and a set of brake assemblies.
The reduction box assembly contains a planetary reduction mechanism to increase the
output torque of the bridge assembly. The driving gear in the box is connected with the rotor
shaft of the motor. The walking speed of the forklift varies with the speed of the motor, and
the driving direction is determined by the rotation direction of the motor. The motor adopts
IP54 protection grade design and almost completely closed design, with stronger
applicability in working conditions, which can be applied to harsh working conditions such
as large dust and oil pollution. The whole bridge adopts multi-chip wet friction brake, which
is located in a sealed cavity to effectively avoid external pollution, greatly extending the
service life of the brake and reducing the maintenance cost. When the brake pedal is pressed,
the wet friction plate is compressed, locking both the motor rotor shaft and the wheel for
prompt braking.
1.2 Disassembly of integrated bridge
When disassembling an integrated bridge, place the bridge assembly in a suitable, clean
place. Open the oil drain plug to drain the lubricating oil from the left and right reduction box
assembly of the integrated bridge.
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