Lipko Posted June 19, 2016 Posted June 19, 2016 (edited) Everyone and their grandma have built a telehandler model, and here's my take on the subject. This is my most complicated model yet, and the development history started back in January, 2013. This model was always the too-complicated one that was cast aside for other models (mainly much simpler cars). This is a manual model with motorized functions. Features: -outriggers -boom elevation -boom extension (1 section) -pallet fork elevation -automatic pallet fork leveling (the fork stays in level during boom elevation/extension) -pendular rear suspension -3 steering modes: 4-wheel, normal and crab (Barman's linkage) -working steering wheel and HOG -opening doors The functions are powered with three L-motors, two of which are powering the elevation. There is a gearbox for two operation modes: boom elevation+extension and outriggers+fork elevation. The functions can be operated with two PF pole reversers. The model went through some complete start-overs, and the final build started at the beginning of May. Everything was restarted from scratch except for the overall look, the boom and part of the gearbox. The main booster of the final building course was the introduction of the new Claas model, which didn't have a fake engine and driveline. This encouraged me to make this trade-off too (it's good enough for TLG too, and a fake driveline isn't really adding anything to playability). This saved a lot of space and making the axles sturdy became much simpler. Another booster was relocating the L-motors above the front axle, which also gave a lot of space. The model became quite lightly packed and tidy. Luckily, Barman also posted his idea how the steering in the Claas model is probably built, and I could incorporate and improve his design. I had another system too, but that sometimes jammed because of the knob gears it used. I improved Barman's initial design by adding a carriage for the link between the front and rear linkage. The rear part is also operated by a carriage, so the whole steering linkage is only 2 studs high. And also everything is doubled to reduce backlash. The system works surprisingly well. The fork leveling is simply solved by connecting the fork drivetrain and the boom elevation drivetrain with a proper gear ratio. The leveling is always driven by the motors. This also means that the boom elevation and the fork angle can be independently moved in only two gearbox states. This doesn't reduce playability, since due to the auto leveling, one hardly has to adjust the fork angle. The maximum angle and length of the boom is quite limited (the above picture shows the maximum angle and length), probably the motors and linear actuators could handle a bit more, but this would require quite some redesign (gearbox for proper auto-levelling, mounting points of the LA, etc). The model is built from about 2100 parts. Video will be ready in a few weeks (or months) and the steering will be explained in detail. More pictures can be found here, if the folder becomes public: http://www.brickshel...ry.cgi?f=560009 Edited June 19, 2016 by Lipko Quote
Ngoc Nguyen Posted June 19, 2016 Posted June 19, 2016 I have been quite reluctant on spending my money on Lego recently because I've already had quite a number of big Technic sets, but if yours were on sale I'll buy with no hesitation! Quote
MikroMan Posted June 19, 2016 Posted June 19, 2016 This is easily one of the best telehandlers Technic I've seen. Especially love the automatic fork leveling. Can't wait for more details and a video. Quote
MajklSpajkl Posted June 19, 2016 Posted June 19, 2016 (edited) Fantastic looks and colour scheme. I really am looking forward to see the steering mechanism. Oh, and I must urge my grandma to start building one asap. Seems that me and her are one of the last people who haven't build a telehandler yet :-) Edited June 19, 2016 by MajklSpajkl Quote
Siegfried Meyer Posted June 19, 2016 Posted June 19, 2016 Lipko I think you have just won the telehandler competition would recommend this to the HOF Quote
Andy D Posted June 19, 2016 Posted June 19, 2016 (edited) This is one outstanding telehandler! I agree with the others, this is one of (if not the) best telehandlers around. I also think HOF is in order. I have wanted to build such a telehandler (along with everyone else here). Looking forward to video, more photos and explanation. Thanks for sharing this! Andy D Edited June 19, 2016 by Andy D Quote
Brickis38542f Posted June 19, 2016 Posted June 19, 2016 A future hof model with no doubt. Brilliant. Quote
thomol Posted June 19, 2016 Posted June 19, 2016 You might want to second this in the HoF discussion topic! Quote
Lakop Posted June 19, 2016 Posted June 19, 2016 Is this the largest telehandler we've seen? I love it. I would have liked to see some yellow colouring (sides and back) but that's minor. The model looks good, the functions are good and it's quite a size. H Quote
agrof Posted June 19, 2016 Posted June 19, 2016 Hello Máté, glad to see that You finished this, and I join to the club: it was worth to develop it so long! :thumbup: I love the whole design, very modern, very sleek. And the functions You put in it.... waiting for the video patiently. You inspire me to work further on my excavator, thank You! Quote
suffocation Posted June 19, 2016 Posted June 19, 2016 Love it! Awesome functions and aesthetics. Will you make instructions? I'd be glad to pay for them. Quote
Andy D Posted June 19, 2016 Posted June 19, 2016 Love it! Awesome functions and aesthetics. Will you make instructions? I'd be glad to pay for them. If you are trying to get a count of how many would buy instructions... Count me in! Andy D Quote
MikroMan Posted June 19, 2016 Posted June 19, 2016 Oh yes, I'd also be interested in instructions for this! Quote
Kristof Posted June 19, 2016 Posted June 19, 2016 I like the colorscheme very much! Nothing agaist these red or yellow handlers but this boosts the look up in the sky :D Reasonable choice of power functions too! The boom look pretty robust. Did you try lifting some weights with that? Quote
rener Posted June 19, 2016 Posted June 19, 2016 Wow! Sell this idea to TLG and we have a flagship model for 2017! Quote
Lipko Posted June 19, 2016 Author Posted June 19, 2016 Thank you for the comments! The LDD file is almost ready but I'm not sure about making proper instructions. The last one I made was very hard and time consuming to make. The boom look pretty robust. Did you try lifting some weights with that? Weightlifting was not a main concern, but I tried it now. With almost fresh batteries it's able to lift a full battery box (the one with the 6 AA batteries). Though the LAs clicked sometimes. When I tried lowering the boom (to check if the auto-leveling can keep up, and it could), uneven occasional clicks in the big LA's caused slight desynchronization and higher stress. So I guess it's not safe to lift the bigger battery box. Without load, it can easily lift the fully extended boom. I'd say it is able to reliably lift a brick built cargo, I will build a pallet and some cargo for the video. Quote
Leonardo da Bricki Posted June 19, 2016 Posted June 19, 2016 That is the best Lego telehandler I have seen! The aesthetics and functionality are superb! I also say it is HoF worthy, and would love to have instructions! Can't wait to see the video. Quote
sm1995 Posted June 19, 2016 Posted June 19, 2016 See, this is an instance where your no-compromise perfectionism pays off. It's absolutely beautiful as well as extremely functional. Absolutely amazing! Quote
Kiwi_Builder Posted June 19, 2016 Posted June 19, 2016 That looks incredible! I look forward to seeing the video and I agree with the others, this is HoF worthy without a doubt. Well done Quote
2LegoOrNot2Lego... Posted June 20, 2016 Posted June 20, 2016 This is a very nice replica of this build-so-many-times piece of machinery! It is build that much because it is appealing a lot... :-) You did a fantastic job on this and I really look forward to the video... Quote
Didumos69 Posted June 20, 2016 Posted June 20, 2016 Ultimately playable and realistic, I love it. Great job! Quote
scarface_le_fou Posted June 20, 2016 Posted June 20, 2016 Seriously, your work is awesome ! The look and the features ! If you decide to sell instructions, do not hesitate to contact me, it will be with pleasure . Quote
Victor Imaginator Posted June 20, 2016 Posted June 20, 2016 Awesome. I think, that I need join this telehandlers club too) Quote
dpkong Posted June 20, 2016 Posted June 20, 2016 Lovely telehandler. An LDD file would be great if no instructions are made. Good enough to assist in building. Many thanks in advance. Quote
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