Something I find absolutely wild is how close the gearing is to a 6-speed Allison transmission. The 4th gear on those (with a standard 3.73 axle ratio) is also 1:1! Absolutely insane engineering thought process!
I love this and I love how automatic transmissions work, could you make a tutorial video or similar so I can find the parts and build one that's similar? I also want to know if it can take any load without gear hopping. Thank you!!
I once made an automatic transmission, but the mechanism was not the point of it. I wanted it to automatically shift gears. I used a differential to detect torque increase of the input of the transmission. Then the torque variation is measured by a motor (mindstorms motor with angle sensor). Another motor change the gear ratio. The transmission itself was not well built, but whenever the input torque increased to a certain level, it shifted to lower gear. With your transmission, it would be awesome!
The video focuses on what is inside the automatic gearbox, the parts that are built, and what has to be set to achieve each gear ratio. The part to automatically move from one gear to another is not covered here.
amazing work, great job! unique issue r u sure about the ratio? looks like your ratio is calculated on the ring gear instead of the input shaft your 4th gear should be 16/56 around 0,28 rotation not 1 am i missing something?
I'm not sure if my explanation will help you, the general assumption is that for the 4th gear, there is no speed increase or decrease at any of the planetary gearsets: - First gearset: Same input speed X for Sun and Planet Gears, no change in the speed rotation. - Second gearset: Same input speed X for Sun and Planet gears, combined with the result for Ring Gear from the First Gearset of speed X. Again the output speed is unchanged. - Third gearset: The input speed X for Sun Gear, combined with the result of speed X from the Second Gearset for Ring Gear. Again the output speed is unchanged at speed X. This link might be helpful to calculate the output from one gearset to another www.thecatalystis.com/gears/
Can you please share where/how to source the components for this? I mean like how much of part A, component B, etc were used? Would love to build one myself for education purposes.
I used the video from the description as a reference and inspiration, then spent countless hours in the Studio building and testing different combinations :) I started working on that a year ago 😅
The first 3 turntables (with 16t gears from a secondary shaft) are taking the place of clutches connecting things 1:1 to the input shaft. So in an actual transmission they're not gears, right, it's just providing a way to get motion to parts of the planetary gears.
Yes, the input shaft with the first and second clutch acts as the transmission input, by locking and opening the clutch we can engage or disengage input for the planetary gearsets. Then later the three planetary gearsets are used to define the proper gear ratio for each gear by stopping or not the ring gear.
This model represents only the setup for each gear. Each step where I'm making the manual changes with the clutches, in a real gearbox is done by hydraulic (and/or electric) systems. Unfortunately, I was unable to include that part in this model.
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Something I find absolutely wild is how close the gearing is to a 6-speed Allison transmission. The 4th gear on those (with a standard 3.73 axle ratio) is also 1:1! Absolutely insane engineering thought process!
Yes, this model is inspired by the Allison transmission gearbox :)
@@BrickEnjoyerChannel let’s gooo bang on!!
insane design, well done mate!
Thanks a lot!
I’ve been waiting for this video for years! Congrats for figuring that out!!!!
Thank you! It means a lot to hear that!
Keep it up man! Love this style of videos without background music 👍
Thanks! The pure sound of bricks is indeed special 😄
Please make this a MOC on Rebrickable or somewhere else :)
Fantastic!
It even looks like an actual transmission.
I tried my best 😁
I am impressed!
I love this and I love how automatic transmissions work, could you make a tutorial video or similar so I can find the parts and build one that's similar? I also want to know if it can take any load without gear hopping. Thank you!!
these are mind blowing i love it
Thanks!
Very impressive! Great job! 👍
Man I love stuff like this and I love your channel keep it up
I'm thrilled you enjoy it! Thanks for the support, and I'll keep the content coming. 😊
Can you make the schifter itself out of lego that works by the design? That would be amazing!!
Noted ^^
I once made an automatic transmission, but the mechanism was not the point of it. I wanted it to automatically shift gears.
I used a differential to detect torque increase of the input of the transmission. Then the torque variation is measured by a motor (mindstorms motor with angle sensor). Another motor change the gear ratio.
The transmission itself was not well built, but whenever the input torque increased to a certain level, it shifted to lower gear.
With your transmission, it would be awesome!
I'd love to see your video and build! Is there any chance to see that?
Impressive!
Now make individual Ev3 motors shift it automatically!
I can't promise anything, but I will consider that ^^
How is that an automatic transmission, when you need to shift it?
The video focuses on what is inside the automatic gearbox, the parts that are built, and what has to be set to achieve each gear ratio. The part to automatically move from one gear to another is not covered here.
Nice!
Fan freakin tastic!
Wow!
amazing work, great job!
unique issue r u sure about the ratio?
looks like your ratio is calculated on the ring gear instead of the input shaft your 4th gear should be 16/56 around 0,28 rotation not 1 am i missing something?
I'm not sure if my explanation will help you, the general assumption is that for the 4th gear, there is no speed increase or decrease at any of the planetary gearsets:
- First gearset: Same input speed X for Sun and Planet Gears, no change in the speed rotation.
- Second gearset: Same input speed X for Sun and Planet gears, combined with the result for Ring Gear from the First Gearset of speed X. Again the output speed is unchanged.
- Third gearset: The input speed X for Sun Gear, combined with the result of speed X from the Second Gearset for Ring Gear. Again the output speed is unchanged at speed X.
This link might be helpful to calculate the output from one gearset to another www.thecatalystis.com/gears/
Do you think you could put this in a car that automatically changes the gears depending on speed?
Can you please share where/how to source the components for this?
I mean like how much of part A, component B, etc were used?
Would love to build one myself for education purposes.
Unfortunately, I'm unable to make such a list 😟
In terms of buying parts, I'm using www.bricklink.com/
Is there a lot of resistance for it?
Would instructions be a possibility in the future?
Unfortunately, I have no time to create instructions for my builds.
Технический оргазм :D
How did you come up with this design?
I used the video from the description as a reference and inspiration, then spent countless hours in the Studio building and testing different combinations :) I started working on that a year ago 😅
how does one engage and disengage a planetary gear?
kinda broke my brain
It might be helpful to check out the video from the description that I used to build my model :)
so the spur gears at the start are just the input for planetary gears later on right?
The first 3 turntables (with 16t gears from a secondary shaft) are taking the place of clutches connecting things 1:1 to the input shaft. So in an actual transmission they're not gears, right, it's just providing a way to get motion to parts of the planetary gears.
Yes, the input shaft with the first and second clutch acts as the transmission input, by locking and opening the clutch we can engage or disengage input for the planetary gearsets. Then later the three planetary gearsets are used to define the proper gear ratio for each gear by stopping or not the ring gear.
ooooh okok@@Stereomoo
yup got it...
@@BrickEnjoyerChannel thanks
I think you don't understand the concept of automatic gearbox
it is about adapting from the load, not about you switching 15 different levers
This model represents only the setup for each gear.
Each step where I'm making the manual changes with the clutches, in a real gearbox is done by hydraulic (and/or electric) systems. Unfortunately, I was unable to include that part in this model.
Can we talk？
Sure, please use an email from the channel page to contact me :)
But its not automatic