Lifting chain is an important equipment for crane to recover objects. The length of the chain can be adjusted according to the different lifting height of the weight, which plays an important role in improving the working efficiency of the crane and expanding the working range of the crane. In the same kind of products, the chain product series is divided according to the basic structure of the chain, that is, according to the shape of the parts, the meshing degree between the parts and the hoisting chain, and the size of the parts.

Lifting chain maintenance and maintenance methods:

1. The chain wheel should be installed on the shaft without skewing and swinging. The end faces of the two sprockets in the same transmission assembly should be in the same plane. When the center distance of sprocket is less than 0.5 m, the allowable deviation is 1 mm. If the center of the sprocket exceeds 0.5m, the allowable deviation is 2mm. However, it is not allowed to rub the tooth side of the sprocket. If the two wheels are braided too large, it is easy to produce chain and accelerate wear. When replacing the sprocket, the offset must be carefully checked and adjusted.

2. The lifting chain should be properly tightened. If it is too tight, the power consumption will be increased, and the bearing is easy to wear; if the chain is too loose, it is easy to jump off and break. The tightness of the chain is as follows: lift or press down from the middle of the chain, and the center distance between the two sprockets is about 2% - 3%.

3. The new lifting chain is too long or stretched after use, so it is difficult to adjust. Links can be removed as appropriate, but they must be even. The link should pass through the back of the chain and the locking plate should be inserted outside. The opening of the locking plate should be opposite to the direction of rotation.

4. When the sprocket is seriously worn, the new sprocket and new chain should be replaced at the same time to ensure good meshing. New chains or sprockets cannot be replaced separately. Otherwise, it will cause bad meshing and accelerate the wear of new chain or sprocket. When the tooth surface of the sprocket is worn to a certain extent, it should be turned over in time (referring to the adjustable surface used by the sprocket). Extend the service life.

5. The old hoisting chain cannot be mixed with some new chains, otherwise it is easy to break the chain due to impact in the transmission.

6. The lifting chain must remember to add lubricating oil in time. The lubricant must enter the fit gap between the roller and the inner sleeve to improve working conditions and reduce wear.