The figure 3 represents the construction hoist used to handle material handling in construction sites Figure...

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Mechanical Engineering

The figure 3 represents the construction hoist used to handlematerial handling in construction sites Figure 3: ConstructionHoist
a) Explain the working principle of construction hoist and itsapplication.
b) Identify the mechanism used for construction hoist.
c) Identify the driving link and generate the kinematicdiagram.
d) How the vibration on the machine is managed duringoperation?

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4.4 Ratings (725 Votes)

A A hoist is a device that is used to lift or lower the loadattached to it by the means of a lift wheelor drum The lifting ofthe load is done by the rope or wire that is looped around thewheel orthe drum The wheel or the drum may use electricity for itsoperation or in some cases it mayalso be manually operated Alongwith the drum and the wire another integral part of the hoististhe lifting medium that is used The different lifting mediums thatare used are chain fiber orwire rope A hook is also availablewhere the load is attachedOne of the most commonly used type ofhoist worldwide is the Chain Hoist The type that iscommonly usedis electrically operated In this type of hoist the chain is usedas the liftingmedium Here there is a closed chain that forms aloop which ultimately lifts the load A pulleyis also attached withthe hoist to lift the load Numerous small and large pulleys arefound inthe chain hoistFor raising the load the chain has to bepulled When pulled the large pulley draws in morechain than whatis required by the smaller side facilitating the beginning of theliftingprocedureThe different areas of application of chain hoist comprises ofindustries mostlymanufacturing ones and construction sitesTheworking of the chain hoist can be understood from the followingpoints It uses gears to multiply the See Answer

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