Fixed-type electric chain hoists are a common type of lightweight, compact lifting and material-handling equipment, widely used in factories, warehouses, ports, automobile assembly lines, and other material-transit applications. They feature a small footprint, light weight, and easy operation. Next, let’s take a closer look at the characteristics of the chain guide structure in fixed-type electric chain hoists!

　　1. Technical Background

　　The fixed-type electric chain hoist is a specialized lifting device installed on ceilings and gantry structures. Characterized by its compact size, light weight, simple operation, and ease of use, it is widely employed in mining enterprises, warehouses, ports, and other similar settings. Compared with wire-rope electric hoists, which are bulky and heavy, the fixed-type electric chain hoist overcomes these drawbacks. Typically, such a hoist consists of an electric motor, a transmission mechanism, and sprockets; the sprockets are usually mounted within the chain guide structure and connected via chain drive. During operation, the chain entry/exit openings may shift due to the design of the chain guide structure, leading to increased wear between the chain and the guide structure and, ultimately, to chain breakage.

　　2. Solution

　　To address the aforementioned issues, a chain guide structure for electric chain hoists is proposed, which enhances the stability of the connection between the chain guide and the hoist’s chain-guiding mechanism and prevents displacement at the chain’s inlet and outlet. The fixed-type ring-chain electric hoist guide assembly comprises a chain guide rail, sprockets, a chain, and guide-rail metal plates. The sprockets are mounted within the chain guide, and the chain guide is detachably connected to the guide plate. The guide plate is equipped with a chain inlet and outlet; the chain enters the chain-guide frame through the inlet, engages with the sprockets for transmission, and exits through the outlet. Within the chain-guide frame, a chain-positioning stop is provided below the sprockets, along with a protruding positioning rib that extends downward from the stop to precisely locate the chain. In the chain-guide structure of the electric chain hoist, the lower end of the chain-positioning stop located beneath the sprockets is extended to form a positioning rib, which cooperates with corresponding positioning holes in the guide plate to provide secondary positioning and secure fixation. This connection design effectively prevents wear on both the chain and the guide plate caused by unstable displacement at the chain’s inlet and outlet, thereby improving the service life of the chain.

　　3. Introduction to the Basic Structure of a Fixed-Style Chain-Driven Electric Hoist

　　1. Housing: Aluminum housing—robust yet lightweight. Equipped with special heat sinks for rapid heat dissipation, enabling continuous operation with an efficiency of 40%. Suitable for use in chemical plants, electroplating facilities, and similar environments.

　　2. Side-magnetic braking: The newly designed magnetic generator is characterized by its ability to generate a magnetic field. It can apply braking even when the power is off, and provides quick, reliable braking under heavy loads.

　　3. Limit Switch: A limit switch is also installed on the upper hoist to enable automatic shutdown, prevent chain overflow, and ensure reliable operation. 4. Chain: An imported FEC G80 heat-treated alloy steel chain is used, suitable for applications in rainwater, seawater, chemicals, and other harsh environments.

　　5. Hook: Forged by hot forging, it boasts high strength and is resistant to breakage. The lower hook can rotate 360 degrees and is equipped with a latch plate to ensure reliable operation.

　　6. Support Frame: The lifting support frame is constructed from two steel plates and is extremely robust;

　　7. Transformers: 24V/36V/48V and other transformer units. During operation, in the event of an electrical leakage, they can prevent accidents and ensure reliable operation even in rainy conditions.

　　8. Electromagnetic contactors: Can be used at high frequencies without issue;

　　9. Reverse Protection Device: For special electrical equipment, if the power supply wiring is incorrect, the control circuit will not operate;

　　10. Push-button switch: Uses a waterproof push-button switch that is lightweight and durable.

　　The chain-guiding structure of the fixed-type electric chain hoist features a detachable conductor and guide frame, allowing the chain to freely enter and exit through the chain inlet and outlet. In addition, thanks to its built-in limit-switch mechanism, the hoist is equipped with protection against overextension or retraction of the chain, automatically stopping operation in such situations.