RE: What is a hoisting mechanism?
BrontobbShucceemo > 09-30-2022, 03:10 AM
Hoisting Equipment lifts loads with either link or roller chain or wire rope. It is powered one of three ways and is used with a number of attachments to facilitate load lift, including:
Manual hoists lift a load under the direction of an operator who typically raises and lowers a lever to activate a ratchet and pawl configuration that incrementally lifts or lowers the load, or to apply or release tension; also called a lever hoist, comealong, ratchet lever hoist, ratchet hoist or wire rope puller. Hand chain hoists are a type of manual hoist powered by a hand chain to lift or lower the load.
Air hoists or pneumatic hoists are powered by pneumatically driven motors. When equipped with a chain as the lifting mechanism, they are called air chain hoists. Likewise, when equipped with a wire rope as the lifting medium, they are called air wire rope hoists. These hoists are often used in environments that require electric spark avoidance due to a potentially explosive atmosphere.
Electric hoists are powered by electrically driven motors.
End effectors or below the hook equipment: A variety of different, application-specific, attachments can be added to the hoist to handle the lifting or positioning of different loads. These include:
C hook is a device that enables the lifting of a coil by through the insertion of a hook into the coil’s inner diameter. A motorized hook rotator powers the rotation of the hook attached to the bottom block of a hoist for additional load control.
Gripping lifters use either friction or indentation-causing pressure to hold a load. Tong grabs or clamps utilize a scissor-type action to grip a load. Coil grabs grasp the outer diameter of a coil via tongs or gripping mechanisms to lift or turn it.
Mechanical lifters are composed of two or more rigid parts that move in tandem when manually actuated to secure the load.
Vacuum lifters utilize an electric-powered extraction pump and sealed pads to create a vacuum to attach the lifter to an object.
Sheet lifters use two claws to grab a load of sheet metal or wood by wrapping around the edges. A lip on the lower portion of the claws prevents the sheet from falling out of the lifter.
Pallet lifters use forks to lift pallets from underneath.
Lifting beams made from solid or fabricated metal, or from wood, are suspended from a hoist/crane to provide multiple load lifting points for better security and control of the load’s movement. A spreader beam uses two or more hooks to spread the load over more than one lifting point.
Magnets lift, carry or release flat or round ferrous objects with or without an electrical power supply.
Slings or strap hoists made of nylon, polyester, wire rope or chain lift materials that are too large and bulky to be transported any other way, such as steel coils or sheets.
Drum turners turn over drums for filling and emptying.