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LEGO models my own creation MOCpages toys shop 4 Speed Transmission + ("Stress reducer")Technic
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4 Speed Transmission + ("Stress reducer")
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About this creation
So when I got the exclusive edition of the crawler, I determined to make a awesome model out of it. Not that the original model isn't already awesome, but it screamed out for a major modification, one that I don't think I can post as a set mod. A complete overhaul of the vehicle was necessary. This is part of that... kindof the guts of the whole thing.



If any of yall have been following my tutorial series, I did one tutorial on transmissions. This is the 4 speed transmission, minus the reverse gear. If you haven't seen that tutorial you can check it out here. I also have thought about adding a new tutorial on clutches, and so forth, inspired as you will see later by this design.





Shifter modules, two m motors powering shifters with worm gear drives. These are best for controling position of the shifters.









And..... The design that I feel is the best part of this little build. The "Stress Reducer" I used to call it a torque converter, but it doesn't quite do the job of a torque converter. It is more of a "Stress Reducer"



What does it do, and why do I need one? That is the right question Detective Spooner. It's job is to reduce the torque stress caused by the XL motor on my gears in my transmission. That is because I didn't want gears breaking and axles bending inside my transmission. It acts much in the same way a Lego clutch gear does, but it is less gutless, and more useful. Who isn't frustrated with the wimpy performance of the Clutch gear? If you are fed up with clutch gears, you need one.



But how does it work? The design is so simple. Two smaller track sprockets are each attached to axles. They are lined up, and attached to each other with 2-4 of the white lego rubberbands. (2 for m motors, 4 for xl)



When a stress such as friction is applied to the axle not connected to the motor, the rubber bands stretch and torque output is lessened to compensate for the friction. When friction lessens, the rubber bands stretch back, and torque returns to normal. If you have the unfortunate of having too much friction on the "drive" side of the "stress reducer" the rubber bands simply stretch and twist up, or come off of the stress reducer. No gears grinding, no axles breaking, the only thing you might break are the rubber bands. What do you think, better than a clutch gear?

Video here (Haven't figured out the new coding for embeding youtube videos yet sorry.)



Comments

 I like it 
  June 8, 2015
Excellent transmission. Like the idea of the stress reducer. Probably transmits smoother power?
 I like it 
  June 8, 2015
Your stress reducer is a work of genius! Goodbye clutch gears, I won't miss them.
 I made it 
  June 6, 2015
Quoting jds 7777 I really like the stress reducer idea! I have one concern though. There is a gear in your gearbox that isn't immediately reinforced. (Can be seen from the underside I think. It's on the bottom of the gearbox) I have noticed with my gearboxes that this can cause gear slip. (especially in crawlers)
Thanks for that idea, I will have to make sure and reinforce it! Thanks everyone for the comments.
 I like it 
  June 3, 2015
Engineering!
 I like it 
  June 2, 2015
Love the stress reducer idea. I could have used this on both my initial NYM's Unimog and my rendition of Sheepo's Mustang. Wonderful idea.
 I like it 
  June 2, 2015
I really like the stress reducer idea! I have one concern though. There is a gear in your gearbox that isn't immediately reinforced. (Can be seen from the underside I think. It's on the bottom of the gearbox) I have noticed with my gearboxes that this can cause gear slip. (especially in crawlers)
 
By George Staples
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LEGO models my own creation MOCpages toys shop 4 Speed Transmission + ("Stress reducer")Technic


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