3D Printed F1 Seamless Shifting Gearbox - Part 1
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- เผยแพร่เมื่อ 19 มี.ค. 2020
- I've taken the leap and started developing a 3D printed model of a F1 car style racing paddle shifting gearbox. As I go along I'll highlight various innovations I've found in their design as well as go over how the various parts of the gearbox work. Design is still underway but once things solidified a bit more I plan on releasing the design to my Github.
#f1 #gearbox #3dprinting - ยานยนต์และพาหนะ
Just wanted to thank everyone and let you know design is still continuing. There have been some delays getting the all of the electronics but I hope to have a new video out sometime in the next week or so pending the arrival of a few things.
Amazing do you have a patreon?
@@kierancarter3693 Thanks! I don't have a patreon. I do this as more of a hobby. I have the designs and CAD for my projects on www.printables.com/@Indeterminate_550491 or github.com/indeterminatedesign
i just found this channel and this is some of the most underrated work i have ever seen. this is a subject i have never fully understood and these models actually help me understand it, mad props to you.
Thanks! I know it’s not the most mainstream of content, but I enjoy getting to share
This channel is HIGHLY underrated. How did I just now find this???
You absolutely deserve many more subscribers. Top notch work and design- cant wait to see how this works. Always been interested in how these work when hyper optimized
Absolutely love your work, these gearboxes fasinate me and seeing you build one is so cool. Keep it up
Absolutely love this!! Great work!
cant wait for the next part. good luck
Show Everything!!! This is so fascinating!!!
Very nice work dude !
Amazing job.
You sir, are a genius
Great job
Dam fantastic job!
That white gear on the nainshaft for the sensor is called a VSS Tone Ring. It's normally steel and used with a hall effect sensor to encode the transmissions speed. Sometimes there is one on the input and output shaft so it can detect slippage
Thanks! I was wondering why they usually have them on both shafts. They also have a torque output gauge as well and I assumed this was what they were using. Or they might be used in combination.
Fantastic.
Pretty amazing! Just curious what is the band/music?
It's free to use music from TH-cam, it says the artist is Silent Partner - Tied Up
DUDE!
Very good job, congratulations. May I ask you a question? How did you print both shafts? I guess it's easier to print them vertically but in terms of stress, it might be better to print them horizontally? I'm designing something similar and I'm afraid the shaft will break if I print it vertically, despite loads are small. Thank you very much!
I printed them vertically. I actually was worried about the strength myself and I designed them to have a metal tube epoxied inside them. But printed out of PLA+ they’re surprisingly strong, it would be difficult to break by hand, and almost impossible radially.
Nice video.
Im curious, what module of the teeths and the center distance did you use?
I don't have the regulations handy, but I believe they specify a minimum distance C2C of 80mm. Mine is ~85mm, and this would be pushed as close to the minimum as possible of course.
The teeth have a module of 3.18 with a pressure angle of 27 degrees. The real gearboxes have different highly optimized gear designs for each gear but obviously there wasn't enough information available for this.
where do you get bearings from, and how many of them are there ?
How do they handle the timing of the two drums? When one drum unselects a gear, the other one must engage immediately. Is there only one layshaft or something equivalent to concentric shafts for even and odd gears? Also how do they downshift while braking without excessive jerkiness, or is it that it still jerks for engine braking?
It’s controlled in the real gearboxes with high speed precision hydraulics and electronic sensors. One drum controls even and one drum controls odd gears. They have a variety of shift modes, seamless shifting where both shift drums are moving at the same time engaged and disengaging. They can also shift like a more conventional gearbox where like you said one drum moves and then the next one. Downshifts are typically not performed as a seamless shift.
That white toothed part is probably an output shaft magnetic speed sensor.
That makes sense. I'd love to be able to find more pics of one of these gearboxes disassembled. I think that part is also integrated into the drive for the gearbox oil pump.
@@IndeterminateDesign You've probably seen the Scott Mansell video where he takes on apart.
Definitely, I've watched his videos many many times. I used that gearbox to inspire the design for parts I couldn't any find pictures of. Unfortunately it's from the generation prior to the seamless shift/dual shift barrels. Current Indy car gearboxes actually look like the older generation F1 and the newer generation F1 gearboxes had a baby together, sort of half way in between.
@@IndeterminateDesign twitter.com/ScarbsTech/status/1226863828891262976
What sized bearings did u use? Where did u find/buy them? Thanks!
I used 6706 thin section bearings. I found them on Aliexpress. They’re difficult to find cheaply, but I was able to order 25 for about a dollar a piece.
What pitch and pressure angle are the F1 gears ? Also, did you use a 1 module tooth height/depth?
I believe the pressure angle is 25, but it maybe 30. I used the same tooth profile for all the gears. I saw grad papers online where top teams optimized the tooth profiles for each gear with some crazy mathematics.
Martin Sunderland Yea, these guys started with throwing away the standard rack (the only thing that is "standard" is that they use whole tooth numbers!). 30 deg (spline) PA seems a bit high but 25-27 is often used. High performance gears are often designed with a High Contact Ratio (total tooth height over 2xModule)....sspreads the load over more teeth. The tooth profile WILL be optimised per gear.....and I would expect that the gear design, including tooth modification/optimisation (if allowed) to be per race circuit. Thanks....it's facinating to see what you have achieved.
Could you link the F1 trans pics?
I’m away from my main computer, I do have these pics up on google. photos.google.com/u/1/share/AF1QipPENk9bfe75O2s7TdGuAtOuxUzl-_yvimi88GtkpOh8HsxaMRRlHgN8fo_JsF8T0g?key=M1VwVG8yZDU3UVl3T2Y0MjNLdlNoQlhCNTZSTFBn
Not to mention they're stressed members of the chassis
This is true. I can’t think of any other gearbox with a titanium and carbon Kevlar case. Someday maybe I’ll have a big enough printer to print out one of those.
Who's here from reddit
Moto gp bikes have real seemless
so not really seemless
Any gearbox more seamless than that?
Zero shift, but the benefit is small in terms of shift speed. In fact the main benefit of Zero shift is Zero backlash ensuring a super smooth shift.