CURRENT LOCATION:

Home / About/News

The lifting process of a chain hoist

2025-10-29

rizhi

The lifting process of a chain hoist: - When you pull the chain hoist chain forward (or downward), the gears transmit the force, releasing the pressure in the brake mechanism and causing the friction pads to separate. - The power is transmitted through a planetary gear system, which reduces the speed of the hoist through multiple stages of gear reduction. The reduction ratio is often very high, such as 1:30 or 1:50. - According to the principle of work: Input work = Output work. That is, Input force × Input distance = Output force × Output distance. - Due to the gear reduction, even though you pull a long distance on the chain, the lifting chain only rises a short distance. Since the “distance” is significantly reduced, the “force” is proportionally increased. This is why you can lift heavy objects with just a few dozen kilograms of force. - The power is eventually transmitted to the lifting sprocket, which winds up the chain and raises the object. The stopping and self-locking process: - When you stop pulling the chain, the object has a natural tendency to fall, causing the entire transmission system to rotate in the opposite direction. - At this point, the core friction pad brake mechanism comes into action. Under the force of gravity, a device called a “ratchet friction brake” automatically presses the friction pads together, generating a large frictional force that instantly locks the transmission system. - This brake is one-way; it only allows the system to rotate in the direction of lifting the object, preventing it from rotating in the opposite direction. As a result, the object can be safely suspended in its position. The lowering process: - When you pull the chain hoist chain in the opposite direction (gently upward), your pulling force partially counteracts the self-locking force exerted by the object, causing the brake friction pads to separate slightly. - Under the force of its own gravity, the object slowly causes the entire system to rotate in the opposite direction, allowing for a controlled descent. - The speed at which you pull the chain controls the degree to which the brake is released, thereby controlling the speed at which the object descends.

RECOMMENDED PRODUCTS

RELATED NEWS

CATEGORIES