Go to Post It's kind of magical how I went from legos to replacing most of the iron in my blood with aluminum, and all thanks to my elementary school science teacher. - Astrokid248 [more]
Home
Go Back   Chief Delphi > Technical > Technical Discussion
CD-Media   CD-Spy  
portal register members calendar search Today's Posts Mark Forums Read FAQ rules

 
 
 
Thread Tools Rating: Thread Rating: 2 votes, 5.00 average. Display Modes
Prev Previous Post   Next Post Next
  #14   Spotlight this post!  
Unread 25-01-2013, 10:09
mglucido mglucido is offline
Registered User
FRC #2838
 
Join Date: Jan 2012
Location: Chesterfield, MO
Posts: 15
mglucido is an unknown quantity at this point
Re: Custom gearboxes

Adam, Thanks for your clarion gear guidance. I was wondering ... Do the bearings fit with only water-jet cutting or do you undercut and ream for a perfect fit? We need to build our first custom gearbox this year and we're planning to use your workflow.

Also, if you'd send your gearbox CAD file to mglucido@charter.net, it would be supremely appreciated!

All the best,
Michael Lucido
Mentor, Team 2838 Eaglebots

Quote:
Originally Posted by AdamHeard View Post
For varied reduction single speed gearboxes, we've done something that I have poorly named in CAD as "AM based lasered gearbox plates".

It's a neat concept, we decide that regardless of gearing needs, we will ONLY use andymark toughbox gears. That means spurs with a .4 overall thickness, and pinions with a .6 overall thickness. Both already have machined nubs so they don't rub on the bearings.

Then, you can machine gearbox plates by whatever means (we like waterjet/laser as it's obviously fast and allows more flexible design).

Design the plates to be 1.125" apart (we usually bolt onto a 1" face with a .125" spacer.

For assembly, press bearings in, and you can use exclusively AM shafts if you desire. We machine our own to perfectly match our needs and eliminate spacers, but this is not necessary.

Doing this allows you to create custom gearboxes FAST and with minimal machining. We've shown you can get just about any reduction, from 1:1, to several hundred to one.

For my first custom geaarbox, I would go in this direction; utilize COTS gears and shafts. Machine only plates, and possibly standoffs. Spacers should not be necessary if you design it right (standoffs as well possibly)!

If you want the CAD for these to make the concept more clear, let me know.

Oh, last little tip, we also try to exclusively use 50T spurs. this allows us to use the aluminum gears AM sells. We cut weight off with our lathe and mill and get them down to .07 lbs each (versus .5 for the stock steel!).
 


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 22:41.

The Chief Delphi Forums are sponsored by Innovation First International, Inc.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright © Chief Delphi