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　　The lower pulley set of the hook is composed of two lower pulleys, hanging can suspended beams, hooks and heavy load blocks. In the early days, like ordinary cranes, the lower pulley set was only one pulley. As the lifting height increases, in order to make the car traction and run quickly, the movement of the lower pulley set of the hook is relatively stable. Most of the lower pulley sets of modern heavy cable cranes have been replaced with two pulleys.

　　The center distance between the two pulleys is generally not less than 3m, preferably 100d Cd is the diameter of the lifting rope). In addition to maintaining the stability of the movement of the lower pulley set of the hook, it is also more beneficial to increase the service life of the lifting rope. The pulleys of the lower pulley set are also made of MC nylon, and the pulley diameter is the same as the upper pulley. Several stop pins should be properly installed on the cover of the lower pulley set to prevent the pulley rope from being pulled out when the lifting rope is loose.

　　According to the general construction arrangement, the running direction of the trolley is mostly perpendicular to the material transport line platform. In order to facilitate material collection, the hanging can be suspended beams were often fixed in a direction perpendicular to the plane of the two pulleys. However, some construction site material transport lines are arranged at an angle, so it is best to make the hanging can be made into a form that can rotate around the vertical center line of the lower pulley group of the hook and lock its direction as needed.

　　The hooks used are only used for lifting operations and their working level is low, so you only need to select the standard hooks according to M3 or M4. Instead of considering M7.

　　The total weight of the lower hook wheel set, if it is too heavy, will affect the effective lifting capacity of the cable crane and consume some energy in vain; and if it is too light, when the no-load lower hook wheel set rises to a higher position, it may not be able to overcome the tension of the lifting rope hanging between the bearing horses, and will decrease by its own weight, especially when the trolley runs to the edge of the abnormal working area on the side of the sub-vehicle. The best way is to reduce the weight of the lower pulley set of the hook as much as possible in the design. When lifting concrete, relying on the weight of the hanging empty lift can, the requirement of the empty can be met; it is also estimated that the weight required can be smoothly reduced in the worst case, and the difference between this weight and its own weight is made into a form of multiple pressing blocks, so as to be added to the lower pulley set of the hook when necessary, so as to meet the needs of lifting work.

　　The lower pulley set of the hook is composed of two lower pulleys, hanging can suspended beams, hooks and heavy load blocks. In the early days, like ordinary cranes, the lower pulley set was only one pulley. As the lifting height increases, in order to make the car traction and run quickly, the movement of the lower pulley set of the hook is relatively stable. Most of the lower pulley sets of modern heavy cable cranes have been replaced with two pulleys.

　　The center distance between the two pulleys is generally not less than 3m, preferably 100d Cd is the diameter of the lifting rope). In addition to maintaining the stability of the movement of the lower pulley set of the hook, it is also more beneficial to increase the service life of the lifting rope. The pulleys of the lower pulley set are also made of MC nylon, and the pulley diameter is the same as the upper pulley. Several stop pins should be properly installed on the cover of the lower pulley set to prevent the pulley rope from being pulled out when the lifting rope is loose.

　　According to the general construction arrangement, the running direction of the trolley is mostly perpendicular to the material transport line platform. In order to facilitate material collection, the hanging can be suspended beams were often fixed in a direction perpendicular to the plane of the two pulleys. However, some construction site material transport lines are arranged at an angle, so it is best to make the hanging can be made into a form that can rotate around the vertical center line of the lower pulley group of the hook and lock its direction as needed.

　　The hooks used are only used for lifting operations and their working level is low, so you only need to select the standard hooks according to M3 or M4. Instead of considering M7.

　　The total weight of the lower hook wheel set, if it is too heavy, will affect the effective lifting capacity of the cable crane and consume some energy in vain; and if it is too light, when the no-load lower hook wheel set rises to a higher position, it may not be able to overcome the tension of the lifting rope hanging between the bearing horses, and will decrease by its own weight, especially when the trolley runs to the edge of the abnormal working area on the side of the sub-vehicle. The best way is to reduce the weight of the lower pulley set of the hook as much as possible in the design. When lifting concrete, relying on the weight of the hanging empty lift can, the requirement of the empty can be met; it is also estimated that the weight required can be smoothly reduced in the worst case, and the difference between this weight and its own weight is made into a form of multiple pressing blocks, so as to be added to the lower pulley set of the hook when necessary, so as to meet the needs of lifting work.