Definition of
hoist
hoista term that can also be referred to as hoistis a machine made up of two sets of pulleysone with mobility and another that remains permanent. Through this system, it is possible to move or lift a heavy body.
What the hoist allows is to move something by applying a force less than the weight of the object. Thus, these rigs are widely used in factories and industrial facilities to move loads and materials. Hoists are often used, for example, to load and unload what arrives or must be sent through a transport truck.
There are multiple types of hoists, which are chosen according to the load that is planned to be moved. There are hoists that apply their power through the electricityothers through levers and some, with hand force. Hoists, on the other hand, can move objects with the help of chains, strings either cablesdepending on the case.
In more advanced installations, hoists may be equipped with arms or be guided by rails that are installed on ceilings and that allow moving the burden throughout the factory or warehouse.
A factorial hoist It is one that has fixed pulleys and mobile pulleys that share a mount. In a hoist of this type with four pulleys (two mobile and two fixed), the force that will have to be applied to lift a load will be equal to a quarter of the endurance.
The formula of the force of the factorial hoist is equal to the endurance (the weight of the load you wish to lift) over 2 for him number of moving pulleysall multiplied by the velocity of the gravity. For example, if the load is 50 kg and there are four movable pulleys, the force F necessary to lift it with a factorial hoist is equal to (50 kg / 2 x 4) x 9.8 meters over seconds squared; the result is 61.25 Newtons.
A potential hoistinstead, is formed by a pulley that is fixed to a point of resistance, located at a height higher than that of the object to be lifted, and by one or more mobile type pulleys. It is a simple machine, a concept of physics that is defined as a mechanical device capable of transforming one movement into another by taking advantage of the incoming force to return a different displacement length, direction or magnitude.
The main function of the potential hoist is the displacement up or down objects too heavy to be handled solely by the force of a person. It is worth mentioning that it is also possible to use it to make movements on the horizontal axis.
Through a steel cable, a rope (also called rope either rope) or a chain hanging from a surface, the fixed pulley is threaded, and another pulley is also supported; at one of its ends the force of traction. From the center of the second pulley, which is a floating type, another cable extends which also clings to the previous surface. Continuing with this scheme, it is possible to add as many pulleys as necessary, without forgetting that each one causes the weight exerted on the previous one to be reduced by half.
About him axis of the pulley that is located at the end of the so-called pulley train resistance is applied. The formula to calculate the force of this type of hoist is as follows: the weight P of the charge on 2 raised to number no of mobile pulleys of which the rig has. The variable to represent the force, in this case, is you.