Lego Technic smoothly switching 2 speed automatic gearbox evolution with instructions
ฝัง
- เผยแพร่เมื่อ 10 ก.ย. 2020
- This video presents my latest compact and smoothly switching 2 speed automatic gearbox made out of Lego Technic. It is both smoothly switching and compact.
The MOC gearbox automatically switches down in gearing ratio when the load on the output is sufficiently high by using a new technique that combines the torque detection and gear switching in a single simple construction.
The video presents the evolution of my ideas from some of my earlier lego 2 speed transmission gearboxes to this latest and improved design.
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VISIT: technicbrickpower.com
BUILD INSTRUCTIONS: rebrickable.com/mocs/MOC-5181...
#technicbrickpower, #legotechnic - วิทยาศาสตร์และเทคโนโลยี
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Check out my website for my great Lego Technic content technicbrickpower.com 🙃
I think this is by far the most impressive automatic gearbox I have ever seen (and I've browsed more than I care to admit on TH-cam). The incredible thing about this one is that absolutely nothing has to disconnect on the downshift. There's not only no loss of traction, there's also no point at which the output can pause or slow rotating during the shift, before the lower gear is fully engaged. Instead, you just get continuous smooth motion. I would 𝘳𝘦𝘢𝘭𝘭𝘺 love to see this in a car - I imagine there would be zero pause as it gets to a tougher slope and downshifts, which is a problem that plagues every auto gearbox in a Lego car that I've ever seen. EDIT: okay I feel silly now, I didn't see you'd already done it in a car 🤦♂️ shame to see it didn't work! Love your stuff though
Hi Geoff. Thanks for your very kind comment. I thought the same about that gearbox until I tried it in a car!! Doesn't mean the idea won't work in other applications though, or in a different configuration. I am going back to the drawing board with it that's for sure. Glad you like my channel - much appreciated. 🙃
Really well explained, mate. Ingenious design - I'm thoroughly impressed.
Very nice gearbox and mechanism, I do not know if the automatic gearboxes are really useful today compare to a electrical variation on a motor, but I like to see how you find solution and improve after.
Thanks Nico - appriacate your comment. Yes you might be right, but do the electrical solutions adjust the output torque automatically or is it via manual control? Anyway I enjoy designing gearboxes regardless LOL 😀
@@TechnicBrickPower Yes you can not have a lot of torque at low speed if you vary the voltage. But for standard vehicle with acceleration it is ok. Only for the truck trial field which is more complicated but again, with the smartphone, app, buwizz, control+ etc, you can add a simple gearbox and have an other motor to operate it. It has the advantage to not lose torque and power in the rubber band or the worm screw but it is way more simple mechanically, so as you said, not really interesting ! (but efficient).
This is awesome!
This gearbox is really REALLY awesome!
Thanks LegoFan - you have great insight!
@@TechnicBrickPower thanks but when instructions? I really want to build it
Hi Lego Fan. I have just put the instructions up for you rebrickable.com/mocs/MOC-51810/TechnicBrickPower/2-speed-automatic-gearbox-smooth-compact 😀
Hi, now that is most ingenious, very impressed with the torque path via the rotating bracket. Please keep inventing and posting 👍🍺
Thanks Carl! You're my #1 fan LOL 🙃🍺
great video. I will be using this in my projekts for sure
Hi there let me know how you go!
Incredibly smart, it just so happens that I received my LEGO package. I will get onto building your gearbox for sure, I really appreciate that you built this because it looks like it took very long to make, this moc is nice
Hi Ants, Glad to hear your lego has arrived already. Always exciting when that happens. Yes this new design will hopefully meet your needs! I will publish build instructions on rebrickable in next few days. 😀
Technic Brick Power thank you!! When is the next gearbox coming? I’m looking forward to it
Next week I guess.....lol 😂
This is a fantastic little gearbox.
Also I just had a 'ahhh of course!' Moment xD, a while ago I tried to make gearbox similar to the big one shown in the video, but I didn't think about the one way pover transmission (predictably resulting in it not really working) so I just got frustrated and gave up.
Fantastic idea!
Thank you Tomol glad you like it.🙃
Well done! What are final speed ratios in 1st and 2nd gear?
ok this is really cool but is there any way of amking it have more than 2 gears? maybe add another adder with a stronger rubber band for the second meshing mechanism so that one will engage until the output becomes stronger than both the rubber bands.
nobody saw the reversed motor at the animations on the start?
Yeah a few people have pointed it out ;) My mistake LOL!! 😂
Do you still need the magic differential / worm with this? It doesn't seem like you would, since the high gear never disengages.
It still has a worm gear to do the same effect. 🙃
Either I built something wrong or the transmission itself needs more power than it gives out in the end. I have checked the friction of the axles, everything runs smoothly.
But my motor with the output gear directly on the drive axle is harder to brake than the output gear on the transmission.
Hi Lars - I think you did everything right - I found the same problem when I tried the gearbox in a car....oops the design worked without any load, but then the load killed it. I need to redesign it sometime...thanks for trying it anyway.
so what happens if you connect two of these in series with more bands on one of them? does it give you 3 speeds?
Hi SuperAWac - in theory yes! In practice...who knows I haven't tried it LOL.
@@TechnicBrickPower i am a bit surprised that lego hasn't made a CVT of some sort
@@TechnicBrickPower i have and yes it does !
Can you post instructions for how to build this?
Hi Sam, yes no problem. I will put it on rebrickable in the next few days. 😀
Hi Sam, here are the instructions for it. rebrickable.com/mocs/MOC-51810/TechnicBrickPower/2-speed-automatic-gearbox-smooth-compact 🙃
Would you be able to make an awd version of this beauty
Hi Lisa, mmm maybe,. Are you thinking about a 2 speed gearbox per wheel, or 1 2 speed gearbox for the whole vehicle?
For the whole vehicle. The moc I’m working on is about the size of the LEGO supercars that came out recently. Also does this gearbox work in reverse?
Hi Lisa, No unfortunately the gearbox doesn't go in reverse. The build instructions are on rebrickable if you want to incorporate the design in your moc car.
0:10 the L motor is put on backwards
Hi yeah oops. not so professional ;)