Here are a few cad projects, un-sellable, but good designs I think. Please feel free to use any designs with all engineering/design/development credit to me.
Please also download the CAD files and modify the drawings with your own ideas. I would love to post them.
- Assembly uses both locks for each retention side.
- Either side actuates the clips on both sides.
- Both clip pieces are the same part.
- Both axispins are the same part.
- All Three gears are the same part.
- Designed to be laser-cut and machined from 7075-AL or 6AL4V-TI.
- Center gear retainer still needs to be designed.
- Autodesk Inventor files.
- To be screwed together with 4-40 pan-heads.
- May be staked under pan and lock-tite-ed to prevent walking.
- May be heated to remove lock-tite.
- Retention edge needs to be radiused for end-mill-able clip hole.
Assembly - Autodesk Inventor
AxisPin.ipt - Autodesk Inventor
Base.ipt - Autodesk Inventor
Clip.ipt - Autodesk Inventor
gear.ipt - Autodesk Inventor
Revised (refined) New Iteration Web Coupler (Belt Release) Solidworks Documents - 12/28/2017
Base Plate Drawing
Web Coupler Assembly
Revised New Iteration Web Coupler (Belt Release) Solidworks/F360 Documents - 03/01/2018
Completely revised Base-Plate. Now the entire assembly used less parts, and tightens itself when force is applied.
So This project got so big it's getting prototyped. The Solidworks files have less filleted sections than I would
like to aid in manufacturing. So add them back in if you like. The Autodesk F360 files are to send out to the
machine shops. The couple-up-at-a-time machining puts the web-arm at about 2k$ a piece! It's a complex part but
mostly because there is a negative chamfer that requires a tool to be made.
The fix was to get the 6al4vTI laser sintered. The part can literally be 3D-printed. SoooOOOoo, there are two ways
to do this. The first is to 3D print an investment and cast the part. The other way is not actually use a laser tuned
to the wavelength Titanium likes, and fuse the Ti itself. This is the way I went and it is 99.5% dense. So is it billet?
No. but it's also 1800 dollars a piece less to produce, and can produce infinitely complex shapes! I'm a little worried
about surface finish, but we will see. I did EDM the gears though.
The last Solidworks files with updated Base-Plate Spindles and Deployed F360 Files below:
Base Plate IGES File
Web Coupler Assembly
Base Plate Step File
Capture Plate Step File
Web Arm Step File
Latest Revision 03/12/2018
Base Plate F360 (more engagement to WebArm, all WebArms and Base Plates can be mixed)
Base Plate STEP
Web Arm .02" Shorter (more engagement)
CO2 Laser Graphics Download Page
Machined Ti, Linen Micarta, etc. Cap has diamond knurled band at base, and is tapped at the top, to except a threaded and bend piece of spring material. Spring
can be produced from Stainless, Ti, etc. Thread is triple-start for speed of assembly.
- Two pieces of the same material (Ti, Aluminum, Stainless).
- Using Clip makes pen retention stronger.
- Pen Retainer prevents cap from unscrewing.
- Heat/Cold should not effect retention.
- Wire clip (over the standard bend sheet steel piece) provides more clip radius for the material.
- Wire clip allows clipping substrate to conform to pen cap.
- Cost effective, threaded, bent spring wire.
- Fast assembly and disassembly.
- Inspired by the Lamy Al-Star, but I believe this could be a better design. Less pieces, all pieces serve more than one purpose.
PenCap - Autodesk Inventor
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