Brian Log
Fri, June 14, 2013
I adjusted the Boom by removing the 30 degree bend. The Boom is now straight. I also came up with several designs for the Bucket. I have also started work on the hinge between the Stick and the Bucket; trying to ensure full movement of the Bucket.
Mon, May 27, 2013
Starting with User:Samthetechie's file File:Warehouse.skp I designed the Boom of the Backhoe.
The Joint: At the bend in the Boom is a 30 degree Joint. A bend will balance the depth and reach of the bucket. The degree of the bend need not be at 30 degrees. 30 degrees was selected merely for ease of calculations and based on the trig of a 30/60/90 triangle. The half inch thick Joint comprises two 8 inch wide plates welded together. On the concave side of the joint is a half inch diameter hole that will eliminate any stress concentration at that point. This is necessary to prevent stress fracture and sudden premature failure of the joint which could cause severe injury. The mounting holes in the joint are standard 1 inch diameter. If the joint needs to be made stronger more may be added.
The Wedge: On the interior of the Joint is an optional quarter inch thick Wedge. The wedge may fill in the gap between the 4 inch tubing. If used the Wedge should be welded to the tubing. Its purpose is to strengthen the Joint by making both sections of tubing one piece. I also included a plate for attaching the hydraulic cylinder which will control the vertical movements of the Boom and Stick. The location of this plate is not fixed, however, it is currently located on the Joint in order to minimize the stress on the joint.
The Stick: The present configuration of the Stick has a pivot plate arranged to act as a fulcrum. This arrangement allows the Stick to have maximum range of motion. Further, the increased length of the Stick extending above the Boom increases the lever arm of the hydraulic cylinder which reduces the force needed to be exerted thereby. This will increase the durability and lifespan of that cylinder.
Next item to be worked on will be the Bucket and its attachment to the Stick. The sketchup file of the Stick and the Boom can be found at File:Warehouse11.skp while a picture can be seen below.
Sat, May 25, 2013
Hey Brian, thanks for collaborating with User:Marcin and User:Samthetechie on the Backhoe today, can you write a few notes on your findings / approach for today. Also, you might find these new parts I uploaded helpful / interesting: File:Boom.skp and File:Stick.skp
Fri, May 17, 2013
Talked to Marcin about Backhoe Stick and Boom Concept Specification. Started work on the backhoe stick and boom. Made stock parts and did an assembly of the boom.
Links to Nickle Iron Battery (NiFe Battery)
Edison Patents
http://www.google.com/patents/US678722 http://www.google.com/patents/US692507
Helpful Youtube Videos
The author of the video "edsworkshop" has several videos from 1.0-1.15 on how to make a nickle iron battery. Below is the link to the first video.