ฝัง
- เผยแพร่เมื่อ 9 ส.ค. 2021
- This is a high strength functional modular pulley system. I printed all the plastic parts with 3d printer and they are PLA material. These provide mechanical advantage and with this design a total 8:1 force gain can be achieved. Since the design is modular, you can obtain mechanical advantage at different rates by using any number of rollers and blocks. I used 8 pulleys and 10 blocks in the design.
The pulleys were printed with a 90% fill rate and the blocks with a 50% fill rate. It looks pretty solid, but for high strength, I recommend printing with high filling ratios (90%-100%).
The M8 half thread used to attach the blocks together. The lengths of the half thread bolts are M8x50, M8x70, M8x90 and M8x110 mm. The thread length of the M8 half thread bolt is 22 mm.
I reached to the most efficient system with the triple tackle. (In other words, the pulley system providing a mechanical advantage at the ratio of 6:1) In fact, it is thought that the highest result will be obtained in the quadruple tackle (8:1) system. But frictions hinder the mechanical advantage we need to gain. Therefore, in the Quadruple tackle system, the motor did not lift any more force.
STL Files: www.thingiverse.com/thing:492... - วิทยาศาสตร์และเทคโนโลยี
I love pulleys, they are just a way to gain leverage that's somewhere between a big stick and a modern gear. By increasing the number of pulleys in a single tackle box its like making a gear bigger and bigger to achieve the desired ratio, eventually one gear gets very large and shears the teeth of the smaller gear. If you on the other hand use a pully to lift a pully that's also anchored that is then in turn attached to the load, you multiply your ratio instead of simply adding to your ratio. In other words if by using three pulleys one at top and two in a single tackle you "quadruple" the leverage. But if you use three pulleys arranged where the motor lifts one pulley that's hard attached to the tackle box via string which is then attached to the load AND anchored to something else instead of going back to the original pully ie. two cables not just one, you still get "quadruple" the leverage while reducing the friction on the single pully and distributing the load to other anchor points instead of just the one and the motor but you do sacrifice maximum height. But you can get crazy by adding junctions to distribute the load in three dimensions instead of simply two dimensional while maximizing your space to fit 500ft of steel cable into a two car garage to be able to lift a 2k lb load only 8 ft by hand.
Excellent editing!
Wow that is strong. You certainly come up with the coolest experiences
You always motivate me with your comments my friend, thank you very much:)
Neat setup. Your design skills have improved a lot. Keep it up 👍
Thanks a lot😀👍
Just curious - why was the quad tackle lifting capacity less than the triple tackle? (edit - never mind, should have read the description!)
Your should design (or use existing designs if they exist) a "Snatch Block" style Block and Tackle next, there is a great video on them by "Smarter Every Day".
Awesome mate well done keep it up 👍
Thank you mate
You make that so interesting. I think because you are entertaining yourself. 😁👋💖
Cute, keep it up sharing
Can you do this experiment but also include the difference in length of cord that is required as a visual representation. I know every time you add on mechanical advantage you have to also increase the distance the cord is pulled by the same factor, but would be interesting to see it visually.
It is, I have a gantry in my garage capable of lifting 2k LBS by hand but I have to go through 250 ft of steel cable to lift it 8ft and there is around 500ft of steel cable in the system.
I like to buy two blocks of tripple pully.The diameter of pully wheel is about 10 cm.
Hello my friend, Unless you try what's new, you can't learn anything new. And you are always trying to teach innovations. And you always produce innovative works and ideas. Thank you for sharing. See you. Hi.
Thank you my friend, see you👋👋
nice !!
you can use a Dyneema Rope. It is more resistent than nylon. With just 1.5mm diameter of dyneema, you can get up about 100 kg
It is a real pain having to stabilize the loads during rigging resets in real life. Hope it has been a great summer for you !
Thank you! I hope you are having a great summer too.
I am a little worried about your ceiling. ;-) nice work!
The hook on the ceiling fell off during testing, that was bad :D
@@retsetman9698 Oh no! Don’t get hurt!
@@KOKENSHATECH thank’s man!
Hallo,❤️ tolles Video👍❤️👍 wünsche dir eine schöne Woche, see you later. Liebe Grüße Siggi und Marianne💖
Danke