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Unread 15-10-2014, 16:47
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Mr. H
FRC #3880 (Tiki Techs)
Team Role: Mentor
 
Join Date: Feb 2013
Rookie Year: 2011
Location: Kailua-Kona, Hawaii
Posts: 252
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Re: pic: Shifting Drivetrain with Transmissions

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!
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Team 3880 - "Tiki Techs" "Mr. H" - Tiki Technologies Coach / Mentor
Kealakehe High School Robotics - Kailua-Kona, Hawaii
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2016 Hopper Division | Orlando Regional Engineering Inspiration Award | Hawaii Regional Chairman's Award & Finalist & Woodie Flowers Finalist
2015 Carson Division | Silicon Valley Regional Engineering Inspiration Award | HI Regional Regional Winners & Engineering Inspiration & Deans List Finalist
2014 Newton Division | Hawaii Regional Engineering Inspiration Award & Deans List Finalist
2013 Newton Division | Inland Empire Regional Regional Chairman's & Creativity Award | Los Angles Regional Engineering Inspiration Award | | HI Regional
2012 Curie Division | Hawaii Regional Engineering Inspiration Award
2011 Newton Division | Hawaii Regional Regional Winners & Industrial Design Award
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Last edited by TikiTech : 15-10-2014 at 17:06.
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