Single-chain electric hoist It refers to a low-speed electric chain hoist in which only a single chain bears the lifting load, whereas traditional low-speed electric chain hoists typically have 2 to 12 chains support the heavy load. Single-chain electric hoist The structural characteristics are:

1. Compact structure. Due to the small number of chains and a ratio of 1, no upper or lower suspension brackets are required; the hook is directly connected to the winch.

2. Forward and reverse movements enable the hoist to lift heavy loads. Because the single-chain block has a mechanical advantage of 1, the total length of chain required for a given lifting height is shorter, allowing all chains to be routed through lower-positioned hooks for continuous lifting cycles, thereby improving operational efficiency.

3. Convenient installation and removal. The single-chain hoist is equipped with no load-balancing mechanism; the hoist is positioned approximately on the centerline between the upper and lower hooks, ensuring even force distribution when the electric hoist is unloaded and facilitating easy installation and removal.

4. The hoist structure is subject to substantial loading, necessitating a re-calculation and verification of the load-bearing components. Compared with multi-chain hoists, single-chain hoists lack a balancing mechanism to share the load; consequently, for the same rated lifting capacity, the stress in many load-carrying components increases markedly, such as:

(1) The driving sprocket experiences a heavy load. It is subjected to significant bending and torsional moments, enabling it to transmit the entire load.

(2) Stress in the减速 mechanism Grow larger , output torque Grow larger , the meshing strength of the gears needs to be rechecked, and the load-carrying capacity of the gear shaft and the shaft itself is relatively high, so they also need to be rechecked.

(3) In a single-chain hoist, the single chain directly bears the entire load; in a multi-chain hoist, however, each individual chain bears only 1/n of the total load, where n is the number of chains.

(4) The motor delivers high output torque. Since the single-chain lift ratio is 1, the motor typically requires low speed and high torque; an 8-pole motor is generally used. Therefore, it is necessary to verify the motor’s shaft-off strength and the braking torque of the motor brake.

(5) Other shafts, bearings, and bearing components are also subject to significant loads and require reinspection.

(6) The electric hoist housing is subjected to significant loads. Since the hoist housing directly bears the entire load, it experiences substantial stress.

Application Advantages of Single-Chain Operation Electric Hoists As follows:

1. Easy to operate

The single-chain electric hoist is extremely easy to install and operate, enabling users to quickly master the operation of the equipment.

2. Small space

Single-chain electric hoists also boast a compact structure and lightweight design, which help save substantial space and land.

3. Simple maintenance

Single-chain electric hoists also offer the advantage of simple maintenance, which can save users a great deal of unnecessary hassle.

Operating Requirements for Single-Chain Electric Hoists As follows:

1. The wire rope must be properly wound, and before lifting, it should be promptly lowered and straightened.

2. When lifting objects, it is strictly prohibited to step over heads or equipment.

3. When two or more cranes are operating on the same track, pushing, pulling, or colliding with one another is prohibited.

4. Shut down the machine upon detection of any of the special conditions.

5. In the event of a sudden power outage during operation, all controllers must be returned to the zero position. Before resuming work, inspect the crane to ensure that its movements are normal.