Four pieces of iron

grabcad

"Entities must not be multiplied beyond necessity" Occam's razor Trying to solve the problem of the most easiest way. Four levers (3 of them are the same). Material: stainless steel. Weight with fasteners 7 lbs (about), Factor of safety from 3 (vertical load) to 7 (horizontal). Three variants of the design Solid - simplest variant, Rigid-with additolal features to prevent rotation of struts (with stress calculations) Bones - if you want to decrease the weight twice (without strength calculations). The instructions for assembly must contain the number of holes in the rail for insert fittings for mounting levers. Updates: 2016/03/30 Added small-scale structure (Variant BONES, render ONLY) that has the following advantages 1. Trauma safe has a smooth outer surface. 2. Good for 3D metal printing (DLS or EBAM technologes). Surface generating algorithm ScekletalMbetter (GrassHopper) 2016/03/28 1. Added stress analysys with load Y direction. Safety factor 5. (update.additonal.zip) 2. Added modification of variant RIGID - Enlarged support. Increasing the contact area between the mounting plate and that leads to a reduction of contact stresses. (update rigid.zip). 3. Variants SOLID+BONES are collected in one ZIP file (download solid_bones.zip) 2016/03/25 1. Added 3-renders BONES Support structure close to optimal (Variant BONES Voronoi3D+t-pipe, Renders ONLY!). Such structures must be designed for effectively use 3D printing. Key benefits of such structures : lightweight, durable, low concentrations of stress. 2. Stress Analysis remade in English (Rigid variant only). Safety factor 3 - vertical load, 7 - horizontal load (file additonal.zip). 3. Slightly refined geometry variant RIGID. This variant includes additional measures to prevent rotation of the levers (rigid.zip). 2016_03_24 Added variant Rigid (rigid.zip, draw_2) with additolal features to prevent rotation of struts.