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Showing results for tags 'Gearbox'.
Found 13 results
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I've made a new gearbox for my next car. This gearbox can either be set to a gear ratio (driving the wheels) or to a function, allowing the drive motors to power something else. In total, there are 4 forward gears, 2 reverse gears and 6 function "ports". The reverse gears weren't intentional - they happened to exist when I added the gearing for the forward gears. The gearbox consists of a turntable with an off-center gear positioned on it. This design uses two off-center gears on the same axle - an 8t and a 12t. This allows more meshing combinations. The off-center gears are driven by a 24t gear in the middle of the turntable, which is powered by the drive motors. Around the turnable, there are many axles with gears on them (12 in this design). When the turntable is rotated correctly, one of the off-center gears meshes with one of the gears on the outside, turning that axle. Some of the axles are connected with extra gears to form a transmission with different speeds; the unconnected ones will be used for functions. Here you can see the internal workings of the gearbox. These are the gear ratios (including the 3:5 gearing before the transmission): Gear 1: 1:2.5 Gear 2: 1:3 Gear 3: 1:4.167 Gear 4: 1:5 Reverse 1: 1:3 Reverse 2: 1:5 Functions 1, 3, 4 and 6: 1:7.5 Functions 2 and 5: 1:5 The gear ratios are rather close, and the reverse ratios are too high, but there is little choice in choosing gears since all of them have to mesh properly with the off-center gears on the turntable. I made all the gear ratios quite high since I'm planning to drive the vehicle with 2 EV3 Large motors, which have tons of torque. There are two inputs - this is purely because I plan to use 2 EV3 Large motors - one on each side of the gearbox. The shifting input drives the turntable with a 28:8 gear reduction - this could be increased, possibly with a worm gear. Note that it is ESSENTIAL to use a MINDSTORMS motor for shifting, since the shift positions are in strange places and not in order. This gearbox can handle plenty of torque - the gearing up before it does help. However, when under high load, the turntable can move out of place and make gears grind. This gearbox works best with minimal backlash on the shifting input. Also, some clever programming can make the turntable adjust its position a little bit depending on the amount and direction of the load, countering the forces pushing the gears apart. The gearbox is very compact for its functionality - comparable in size to a 4-speed sequential gearbox. However, it can only be used with a MINDSTORMS motor for shifting, which will make it useless for most of you guys (unless of course someone develops a version that can be controlled by a PF servo...) -
Hi guys, This is my LTR (Lego Technic Rally) car, which i have build a few years ago. It has independent suspension on all wheels and it is all wheel drive. Because it is for rally i have used two RC motors for propulsion and experimental gearbox (low gear for offroad, high gear for flat roads and downhills). As you will see in video everyone use cable remote, it's because of RC motors power consumption (in that time there wasn't V2 reciever) and weight. This car no longer exist, but i still have the chassis without gearbox. Remotely controlled functions (cable): Driving (2 RC buggy motor) Steering (http://www.peeron.com/inv/parts/47154) Gearbox (M motor) Propulsion: slower RC motor output to gearbox ( 1:1, N, 12:20) and then 20:28 (differential) Steering: 12:20 to 8:steering rack Weight: about 850g Speed: (fast walk) :-D Brickshelf gallery: http://www.brickshel...ry.cgi?f=490253 Video(from the Race): Front: Back: Bottom: -
Having none of the new 3 wide driving rings is a problem if you want to build Sariel's new RC gearbox, so I decided to modify the gearbox to work with the 2 wide driving rings for all to use. I have made the LDD file which you can download below. Full credit goes to Sariel for the original design and his post can be found here: http://www.eurobrick...howtopic=107240 The green and red axles on the sides are supposed to be connected to the green and red right pieces on the model, it is like this due to LDD not allowing me to place the sides on the model. Any faults in the model, put them in comments and I'll fix them when I can Enjoy the gearbox! Sariel's 4 Speed RC Gearbox Using 2-Wide Driving Rings.lxf -
Since the other thread got locked, I will present these models in this new thread. I always wanted to do a Police style car so this seemed like a great opportunity to do a proper Yin & Yang take on the same vehicle... Both models feature many new 2015 parts including the new driving rings and gears in my first ever linkage style gear shifter... The black one does use some parts that are either impossible to find(19L black flexible axles) or other parts(like the 9L and 11L orange liftarms) that are very expensive... I am going to try and figure out a way to properly work around the flex axles and incorporate 16L ones, but the best presentation seems to be the 19L ones... I think with the release of the 42043 and the new white micro panels, this car can easily be done in all white, or a combination of white and another color since now the 19L flexible axles in white are abundant.. Brickshelf Folder -
2015 Predator Supercar Full Article HERE Specs & Features - L x W x H (studs): 59 x 31 x 13 - # of parts: undisclosed at the moment (Anyone wants to take a guess?) - The heart of the car consists of a V8 engine; - A vertical positioned gearbox is located right behind the engine and transfers its power directly to the rear wheels; - the 6 different speeds (5+R) can be manually selected with the gearstick between the seats and has a one to one mechanical connection to the gearbox with some linkages; - All wheels are suspended independently with double wishbones; - The front wheels are steered through either steering wheel or HOG and include ackermann geometry; - Front axle also has positive caster angle and kingpin inclination. Bump steer is minimized due to the low location of the steering rod; - Gullwing doors which can be controlled from directly above the airintakes on the side and include a wormwheel configuration; - Bonnet and engine cover can be opened as well, but this is done manually and they have a built-in limitation of their respective opening angle. They stay open due to friction. Looks like Nate has some new teasers up for his new supercar design... No doubt this will be awesome..! "A New Revalation" "After many months of development a new beast is soon to be unleashed! Remember the chassis for a new supercar that was presented here a few months ago? Well, the long wait is almost over and a new Predator is on its way. Many iterarations later and updated with the latest arrival of new parts it's bigger, meaner and more accurate than ever before! A few titbits to wet your appetite: the model is roughly the same size as the recently launched 42039 24-hour racer. But the similarities do not end there. Both use for example the exact same amount of panels, both are powered by a mid engine V8, and then there are a few other features that share some similarity. But that's where the comparison ends, and although on paper they seem similar, in reality they are completely different! All will be revealed soon..."
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Hi all! I finished this build yesterday, and am quite happy with the resulting model, so I took it out for some pictures today. Unfortunately the batteries in the model died out before I had a chance to film it, so I'll have to do that tomorrow (feel like I need to prove that all the functions actually do work on this one ) So here it is, the Tow Truck Mk II, a combination of a European truck with a typically American "rotator crane"(??) on the back (a Eurotator?) First some information regarding this MOC (of course, you don't have to read it ) As many of you might know, I built a pneumatic tow truck/recovery truck roughly two years ago, and a lot of you even seemed to like that model! When I finished that model, I wanted to make an RC PF version with the same functions and body, and I also wanted to make one powered by just one motor, with function switching gearboxes as the ones you see in most of the official non-RC PF sets released by TLG. Well, it only took about to years to get around to actually doing it! Due to the fundamentally different techniques building with pneumatics vs mechanical functions, some compromises had to be made, and some features could even be added! Firstly, this model has no suspension. The back of the model is pretty densely packed with axles and gears and functions, so fitting live axle suspension while maintaining a somewhat acceptable overall rigidity in the model was deemed impossible (for me) very early on. Also, du to the various functions going to the front, suspension there was not worth it either. Secondly, the swing-out outriggers of the original model from 2013 needed to be unnecessarily complicated, bulky, and not very strong, so I opted for an alternative solution. However, I did manage to make the fourth axle steered, something the 2013 model did not feature As you can see, it uses the genreal colour scheme and a lot of the stickered pieces from 8109. The model was initially all yellow, like the last one, but I wanted to spice things up a little, and am very happy with the resulting colours Okay, enough babbling, here are a couple of more pictures: In the above picture, everything is deployed/opened. The motorized functions are: 1. Tiltable cabin (small LA) 2. Front stabilizers/outriggers (small LAs) 3. Front winch 4. Middle outriggers (worm drives, self locking geometry) 5. Rear stabilizers/outriggers (small LAs) 6. Wheel lift elevation (small LAs) 7. Wheel lift extending (large LA) 8. Wheel lift tilting (small LA) 9. Crane rotation (worm drive) 10. Crane lifting (large LA) 11. Crane boom extending (worm drive/z8 gear/gear racks) 12. Crane winch Other features are: -Openable doors -Working V8 engine -Openable side- and rear panels (to access battery box, as well as some chains and attachments for the towing fork) -Proportional steering with Ackermann geometry on axles 1, 2 and 3. The crane superstructure has two gearboxes for the three functions up there. That means there is a constantly running single axle going through the turntable, and the cranes functions are selected up top. This allows for infinite rotation, with none of the cranes' functions being affected. Yeah, I know that bull barmight be ever so slightly overkill, but IMO it's not too bad It can even lift things directly in front of it Lastly, the underside shot: Also, for those who haven't seen them yet, here are a couple of quick renders showing the internals of the model: And with colour coding for the various functions All pictures and renders can be found in higher resolution in the appropriate Bricksafe folder. Overall I'm quite happy with the resulting model, but even though all functions work, at least one of them is not ideal (cabin tilt; I'm looking at you). Also, I feel the crane superstructure could be made more elegant. Anyway, hope to be able to make the video tomorrow! Comments, thoughts and criticism is as always appreciated! -
Ah, the humble gear mechanism. From as early as 1999, a gearbox has been something which has defined a Lego action figure, and arguably made it whole. Although they had an extensive hiatus, gearboxes have returned to constraction in a big way. Many MOCists are taking inspiration from the reboot of Bionicle, and are mechanising their custom creations. Some, however, aren't just using the gearboxes the Danish gods provided them with. Custom gearboxes have hit the scene, allowing for more unique functionality and animation. Ingenious methods of motion are being integrated into models which would otherwise stand static. This thread is for you to share your own custom gearboxes, or work together with other users to develop new ideas. I'll start off by sharing a few of my designs. LW2 - Designed for stability on larger figures. LW1 (not its official name) is a gearbox coined by ToaLeewan, and is the core design the LW2 adapts upon. I have used this on several models, the first being G2 Umbra. SL1 - Designed to mimic the functionality of the Slizers. Rather superfluous, but still a fun experiment. K1 - Designed for back and forth shoulder motion, which realigns via an elastic band. I've only used this on Kaikohuru. MG1 - For use on smaller figures that use the 'XT4' frame.
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This is a remote controlled car that I am working on. This is the demo of the 3 speed automatic gearbox that I tried to improve for this project. It uses a differential gear to transfer the overload torque to select lower gear. http://www.brickshelf.com/gallery/darkboy101089/Gearbox/imag0245.jpg http://www.brickshelf.com/gallery/darkboy101089/Gearbox/imag0246.jpg http://www.brickshelf.com/gallery/darkboy101089/Gearbox/imag0247.jpg http://www.brickshelf.com/gallery/darkboy101089/Gearbox/imag0248.jpg http://www.brickshelf.com/gallery/darkboy101089/Gearbox/imag0249.jpg Current WIP http://www.brickshelf.com/gallery/darkboy101089/Gearbox/imag0251.jpg -
Hi Everyone! I just created this, and thought I would share, as it might give someone an idea for a us in a Moc or something. I'm thinking a car perhaps with seats on top. It could only be 3 studs high. It basically gears around the stationary motors and I'm guessing creates the following ratios. 1 motor equals 4:1 2 motors equals 2:1 3 motors equals 4:3 And 4 motors equal 1:1 output. Now if you could create a level on the remotes that engages 1 channel at a time, you would have silky smooth gear changes! Sorry if this has been done before! -
The Koenigsegg One:1 was introduced in 2014. Seven examples, including one prototype, were built during 2014 and 2015. This was one of the most exclusive production car programs ever envisaged in the car industry. The hp-to-kg curb weight ratio is an astonishing 1:1. This has been called the “dream” equation, previously thought impossible when it comes to fully road legal and usable sports cars. The One:1 is the first homologated production car in the world with one Megawatt of power, thereby making it the world´s first series produced Megacar. More on the One:1 at http://koenigsegg.com/one1/ This car grabbed my attention about a year ago so I decided to try to build it. The design parameters that I want to achieve include the following: Replicate the rear triplex suspension set up of the Koenigsegg One:1 as closely as possible Replicate the front suspension set up Syncro dihedral door hinges which are typically Koenigsegg Paddle shift gearbox - a new challenge for me. A good approximation of the real car with the bodywork. Tough enough to withstand my young three year old playing with it. Intuitive enough for my kids to explore the functions. After a long build process and lots of experimentation I am really happy with the end result. The paddle shift gear box ended up being 3 speed plus reverse mainly due to space restrictions and also complexity. Perhaps a future project will be to expand this concept to include additional gears. The paddle shifts at the steering wheel are aesthetic in that they are linked to the actual manual shifters which are camouflaged on top of the dashboard, but it is not really possible to exert enough force on the dash paddles to change gear. This is presented in the images below and in the CAD image. Over time I will digitise this and add a bit of video to show the functions, but first, here are some pictures. [TBC] -
[MOC] Exotik Supercar
Anto posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
The name of this supercar was chose for its exotic style. The front has a particular style : there is not calander. On all the car, there are aerodynamic details, like the air intake. The rear is square. It has headlights, exhausts and air intake. The interior is quite detailed, with the dashboard. The motor is placed in the centre of the car, because of the gearbox (Nathanaël Kuipers's system). The functions of this supercar are : Steering with return to the steering wheel Full independent suspension Flat 8 fake engine with 5+R gearbox Openable front and rear hood, doors The HOG is placed in front of the dashboard. The steering wheel turns with the wheels. The suspension is quite simple, but the rear was difficult to do because of the gearbox. I have put 2 shock absorbers on both side. The gearbox is very similar with the Predator's gearbox. The idea is the same, and it is almost identical because there is not an endless of possibilities to do this type of gearbox. Here, the rear hood opening : The front hood opening is quite simple, but nice. And the most complicated function of this supercar : the doors opening. I have worked 20 hours on this function and made around 10 versions ! (~100 hours for the total) -
Here is an early prototype concept from Nathanaël for a new supercar... The gearbox placement is vertical behind the mid mounted engine, which is pretty unique and it works off of a slick linkage system... This will defintiely be progress to keep an eye on... More information HERE
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I think, it would make sense to open a new thread for the Unimog 8110 U-400, that includes all the MOCs, changes, improvements on the Unimog. It should also contain all the new attachments, equipments, that people build. It should show their ideas and what they are creating for this cool set. I am looking forward to see your creations! I'll start today. I implemented a pneumatic driven cargo bed. It is driven by the original motorized pump and works pretty well. The lifting angle could be better. So there is still room for inmprovments. For more pictures of this MOC plesae vistit my Flickr-page or (after publishing) my Brickshelf-folder. Regards, Gerhard
