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Unread 15-10-2014, 18:03
Oblarg Oblarg is offline
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AKA: Eli Barnett
FRC #0449 (The Blair Robot Project)
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Re: pic: Shifting Drivetrain with Transmissions

Quote:
Originally Posted by TikiTech View Post
Aloha!


Been away from the CD scene for a little bit. Turns out this thread is what our team has been working on for the off season.. So I thought it would be a good time to share it.

Transmission:
http://www.chiefdelphi.com/media/img...2202479c_l.jpg

Drivetrain:
http://www.chiefdelphi.com/media/img...40fec228_l.jpg

Here is our Tiki Tech Transmission and prototype drive frame.

The transmission plate is based on the awesome stuff from West Coast Products and Vex Pro.

This transmission is set up to run two motors on either side of the frame rail. We have designed this to use on our 2015 prototype drivetrain. It has enough clearance to go over our newly designed 1.5x3” chain and sprocket in tube frame. We have changed the mounting points to a much wider and easily accessible for quicker removal.

The system uses basically everything you get in a WCP 2 speed (DS) transmission. Plus one idler gear. Which is a duplicate gear of one that is already in the kit.

Great thing about it is that it uses any of the dog gear sets from WCP. Mix and match pinions as well, so you can get that speed ratio that suits your approach best. It is nice and compact at less than 3” (2.3 to be exact). With the pneumatics and encoder there is still lots of room in the center for use.. Battery centered is easily done!

It has an encoder mount as well. Which easily adapts to your preferred encoder.

Since this transmission plate uses WCP gears it is quite easy to setup. Just purchase their 2 speed transmission (or just the gears) and all that has to be done is turn down the input shafts to desired length (depending on if you are running the chain/belt in frame or not) and purchase the extra idler gear, input shaft and bearings. In fact when we turned down the input shafts, we just made one longer and let the one protrude past the bearing into the encode. That is how we discovered where to put the encoder mount it.. It can be done very easily with limited tools!

This new plate can be made as a solid plate or milled (as shown). Depending on your machining capabilities.

The second prototype has grooving along the outer edge for Lexan covers to keep fingers and debris out.

Questions or comments let me know, we love to hear what you think.
Enjoy!
Looks like an awful lot of weight with that 4-gearbox setup - any particular motivation for that rather than a single 3-CIM gearbox?
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Member, FRC Team 449: 2007-2010
Drive Mechanics Lead, FRC Team 449: 2009-2010
Alumnus/Technical Mentor, FRC Team 449: 2010-Present
Lead Technical Mentor, FRC Team 4464: 2012-2015
Technical Mentor, FRC Team 5830: 2015-2016
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