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Jiangsu Jiuyi Lifting Pulley, commonly known as a lifting hoist. It is a simple lifting mechanism that vertically lifts heavy objects through sprockets or drums. It is lightweight, compact in structure, and easy to use, suitable for simple lifting operations in construction. Lifting pulleys can be classified into single-sheave, double-sheave, and multi-sheave pulleys based on the number of sheaves. According to the connection method between the pulley and the lifted object, they can be divided into four types: hook-type pulleys, chain-ring pulleys, ring-type pulleys, and spreader-beam pulleys.

A lifting pulley is an important lifting tool. It has a simple structure, is easy to use, and can repeatedly change the direction of the traction steel cable of the pulley or pulley block, as well as lift or move objects. Especially when combined into a pulley block, used with a winch, mast, or other lifting machinery, lifting pulleys are widely applied in construction and installation operations. Product specifications range from 0.03 to 320 tons, with wheel systems from single wheel to ten wheels. Lifting attachments include hooks, chain rings, rings, and spreader beams for user selection. They are convenient to use, have a wide range of applications, and can be operated manually or mechanically. They are mainly used in factories, mines, agriculture, electric power, construction, and other production and construction sites, as well as for machine installation, cargo lifting, etc., in docks, shipyards, and warehouses.

A single lifting pulley can only change the direction of force, not save effort; however, a pulley block composed of two pulleys can achieve force saving while changing the direction of force. During lifting and transportation operations, a single-sheave pulley can be used as a guide pulley; a pulley block can be used with a winch for lifting purposes.

The ball and roller bearing wheel cores used in lifting pulleys are national standard bearings, with two per sheave. Different specifications can be adopted according to the lifting tonnage. Standard bearings are suitable for high-speed operation and are maintenance-free.

Jiangsu Jiuyi Lifting Pulley Classification and Structure

Lifting pulleys, also known as iron pulleys or sheaves, are used in lifting operations in conjunction with rigging, lifting accessories, winches, etc., for transporting and hoisting various structural equipment and components. They are indispensable lifting tools.

Pulleys are classified by usage into fixed pulleys, movable pulleys, guide pulleys, and pulley blocks, etc.

(1) Fixed pulley. A fixed pulley is used to support the movement of flexible parts. When the rope is under tension, the rotor rotates, but the position of the axle remains unchanged. In use, it can only change the direction of the steel cable, not save effort.

(2) Movable pulley. A movable pulley is installed on a moving axle and moves up or down with the object being towed. Using a movable pulley saves effort but cannot change the direction of force.

(3) Guide pulley. A guide pulley, also known as an open-side pulley, is similar to a fixed pulley; it can only change the direction of the rope, not save effort.

(4) Pulley block. A pulley block is a lifting tool composed of a certain number of fixed pulleys, movable pulleys, and rigging. It can both reduce traction force and change the direction of pull. In hoisting projects, pulley blocks are often used to lift heavy machinery with less traction force. For example, when using a 0.5 to 20 ton (5 to 200 kN) winch to pull the end of the rope of a pulley block (commonly referred to as the running line), it can complete the hoisting of equipment or components weighing from several tons to hundreds of tons.