The power system of a construction hoist is like the engine of a car; it's the heart of the entire machine. Key components include:
Electric motor: Provides lifting power, typically a three-phase asynchronous motor.
Gearbox: Reduces speed and increases torque, ensuring smooth operation.
Brake: Provides rapid braking in emergencies, ensuring safety.
Coupling: Connects the motor and gearbox, transmitting power.
These components work together to enable the hoist to stably lift heavy objects.
Load-bearing and guiding system: The hoist's frame and rails determine its load-bearing capacity and operational stability:
Guide rail frame: A vertically mounted metal frame that provides the lifting path.
Cage: A platform for loading personnel and goods, equipped with a fall-prevention safety door.
Roller assembly: Enables smooth movement of the cage along the guide rails.
Counterweight system: Balances the weight of the cage, reducing the motor load.
Damper: A bottom shock absorber that absorbs impact energy.
Safety Protection Devices
These seemingly insignificant small accessories can be lifesavers in critical moments:
Limit Switches: Prevent the cage from overshooting or bottoming out.
Fall Precipitation Safety Device: Automatically brakes in case of overspeed.
Emergency Stop Button: Manually stops the machine in case of an emergency.
Door Interlock Device: Ensures the door is closed before operation.
Overload Alarm: Issues a warning and locks the machine when the load is exceeded.
