Human Electric Trike Thesis

Design of an electrically assisted human powered trike

Fabrication pictures

Posted by Bob Dold on Sunday, October 22, 2006 11:10 PM

Spent about 20 hours this week assembling the frame, the process consists mostly of loctiting a joint, letting it set overnight and then moving on to the next joint. The assembly has to be put together in a certain sequence or the parts will not go together. To start I put together the rear of the frame as shown below, using the waterjet cur seat tube support to space everything correctly.


After the rear section was put together I assembled the front bulkhead. I cut 3/8 tube spacers to space the plates apart about 1.285 to allow clearance for the front suspension rocker arms to swing freely.

At this point I connected the front and rear sections using the longitudal frame rails which had their suspension mounting blocks already bonded on:

The completed frame assembly is shown below, at this point the mounting holes for the suspension rod ends need to be drilled and tapped to accept the control arms. So far I had only one bonded joint fail – this happened when I had to use a mallet to pound the lower frame rail into place through the tight fitting bulkhead – loosening the rear block where the swingarm will mount. I removed the block and rebonded a new one – I think the large impact loads from the hammer caused the joint to fail, in actual use none of the joints should see axial impact loads of the magnitude the failed joint saw.

Frame assembly ready for tapped holes and suspension mounting:


One Response to “Fabrication pictures”

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