Hollow Ball For Egg's Protection

grabcad

My entry for the challenge, based on the idea, using a hollow ball,together with a threaded cover for adjusting the egg in axial directionand closing the hollow ball.The principle of a trampoline helped me, to make a design with spring elements like cup springs, which hold the egg in axial direction in the center of the hollow ball.For elastic fixation in radial direction I used two separate spring element rings, which are able to hold the egg, similar in a cage.The outer ball housing diameter is 100 mm and the general wall thickness is 3 mm.The thickness of the spring elements is 1 mm.The model of the egg I've carried over by "Seishiro Okazaki".The egg has to be inserted in a pre defined position, before closing the hollow ball withthe threaded cover, to get no axial clearance of the egg.The preferred material for 3D-printing is »ABS«, but unfortunately I can't call a 3D-Printer my own, so that I could not test my proposal.An additional small hint:My proposal also could easily tested on a bowling alley ;-)or you could throw the assembly against a wall, from a specified distance and with an inital velocity.Further technical notes:Impact velocity after a fall of 4,572 m : 9,471 m/sDensity of »ABS« for calculation of the mass : 1,04 g/cm^3Volume of the complete assembly (without egg) : 106,86 cm^3Mass of the complete assembly (without egg) : 0,111 kgPotential Energy (without egg) : 4,9 J = (Nm) = (Ws)Spring are elements not calculated resp. no FEM-analysis done.The result of my design - may be, because not yet tested - is a concept only!Model available in the following data formats:STEP-file (.stp) of the complete assembly (2 components and egg included)STL-files of the 2 components for 3D-printingNative data (.prt) and (.asm) in a "zipped" folder for users of»PTC Creo Parametric 2.0«Thank you for your attention!