I. Core Overview A wire rope electric hoist, commonly referred to as an “electric hoist,” is a machine that uses an electric motor to drive the mechanism, which is then transmitted through a gear reducer. The hoist lifts heavy objects using a drum and wire rope. It features a compact design, ease of operation, and high reliability, making it an indispensable lifting tool in modern industry. II. Main Components 1. Electric Motor: - Main Hoisting Motor: Responsible for providing the primary lifting power. - Running Motor (for mobile hoists): Drives the hoist to move horizontally along the track. 2. Reducer: Reduces the high rotational speed of the electric motor to a lower speed suitable for the drum, while increasing the output torque. Multi-stage gear transmissions are commonly used. 3. Drum: Used for winding and storing the wire rope. Its design and diameter directly affect the service life of the wire rope. 4. Wire Rope: The core component that carries the heavy objects, typically made of multiple strands of steel wire twisted together, providing high strength and toughness. 5. Hooking Device: Includes a fixed hook at the top and a movable hook at the bottom, used to suspend and lift the heavy objects. It is usually equipped with safety latches to prevent the hook from coming loose. 6. Limiters (Safety Devices): - Up/Down Travel Limiters: Automatically cut off the power when the hook reaches its upper or lower limit, preventing dangerous incidents such as “overreach” or “excessive rope release.” - Overload Limiters: Stop the hoist from operating when the lifting capacity exceeds the rated load, ensuring the safety of the equipment. 7. Electrical Control System: - Control Box: Contains electrical components such as contactors and relays. - Handheld Buttons/Remote Control: Operators control the movements of the hoist by pressing buttons (up, down, left, right, stop). Wireless remote control has become the mainstream trend. 8. Running Mechanism (Available only on mobile hoists): Includes motors and wheels, allowing the hoist to move along I-beam tracks.