Above is a drawing of the final design. The design is based on a workshop gantry crane and it is very simple in design as this was done deliberately to minimise the effort and confusion when setting up the crane and when using it. Therefore the crane comes only in three pieces one I beam and two struts.
I decided that a mechanical winch and a mechanical hoist would be the best option again to make things easier for the user. The winch will slide into the I-beam whilst setting up it will have wheels which will move the crane in the X direction. A diagram of the winch on the I-beam can be seen below:
The I-beam will be bolted onto the I-beam via 8 bolts these will be sufficient enough to hold the parts together. These will be the only parts on the crane that will be bolted together.
See below:
The crane will rest on rubber spheres that are flat at the bottom; it will be placed on rough ground so the spheres will fit into the ground to provide extra stability. Initially we thought about adding wheels but these would have been unnecessary and may have reduced the stability of the crane. The design of the crane is actually quite durable, there are no wheels or no attached bits to the crane therefore one does not have to worry about things breaking.
The crane parts can easily be transported by a small helicopter and taken to the site. It will take a total of 8 people to carry the crane parts; 3 people for the beam two people for each strut and one person to carry the winch and hoist. Although the beam itself will not be able to fit inside a land rover a separate carrier compartment can be made where the crane can be hauled by the 4X4.
Below are drawings illustrating the dimensions of the crane:
(Supporting Sphere)
I-Beam (The I-beam will be 5M in length)
(Strut Side View)
Square beam (struts) this is a cross section of the struts.
(support and bolting plate) this is where the struts bolt onto the I-Beam. The triangle piece is there to provide support to the beam.
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