Question

in tower crane, explain the possibilility of inversions on the identified mechanism .

Answer 1

Answer:-

                Tower crane are a common fixture at any major construction site. They are pretty hard to miss, they often rise hundreds of feet into air, and can reach out just as far.

                 Inversions of mechanism is a mechanism consists of number of links. A mechanism is obtained by fixing at least one link of a kinematic chain to achieve desired output for a given input, inversions in mechanism is obtained by fixing different links of the same kinematic chain.

                  There are 5 parts of a Tower Crane.-

                   1. The Base is bolted to a large concrete pad that supports the crane.

                   2. The base connects to a Mast ( or Tower) , which gives the tower crane its height.

                   3. Attached to the top of the mast is the slewing unit that allows the crane to rotate.

                   4. Attached to the slewing unit is the Jib , the machinary arm, the counterweights.

                   5. The Operators Cab.

              The long horizontal Jib , which is the portion of the crane that carries the load. A trolley runs along the jib to move the load in and out from the cranes center.

              The shorter horizontal machinary arm, which contains the crane motors and electronics as well as the large concrete counterweights.