When the manual chain block lifts the weight upwards, it shakes the manual chain and the hand wheel in a clockwise direction. When descending, the chain is pulled counterclockwise, the brake seat is separated from the brake pad, and the ratchet is stationary under the action of the pawl. The long axis of the tooth drives the lifting sprocket to run in the opposite direction, thus smoothly descending the weight. The chain hoist generally adopts a ratchet friction plate type one-way brake, which can brake itself under load, and the pawl meshes with the ratchet under the action of the spring, so that the brake works safely.
The manual chain hoist is safe, reliable, easy to maintain, high in mechanical efficiency, small in pulling force of the bracelet, light in weight and easy to carry, beautiful in appearance, small in size and durable. It is suitable for factories, mines and construction sites. , docks, docks, warehouses, etc. are used to install machines, lifting goods, especially for open air and no power supply operations, showing its superiority.
The main parts of the manual chain hoist are made of alloy steel. The chain adopts 800Mpa high-strength lifting chain. The material is generally 20M2, medium frequency quenching heat treatment, low wear and anti-corrosion chain; high strength hook, the material is generally alloy steel. The calendered hook design ensures a slow lift to prevent overload; it meets safety standards.