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06-16-2012, 06:52 PM | #1 |
Newbie Join Date: May 2012 Location: Beijing
Posts: 17
| My DIY remote control diff lock for Wraith
Hi, Guys. Previously, I was looking for an available axle with a remote control diff lock. Only RC4WD has one. The size does not match, and it is too expensive for me. So I tried to DIY one. It is available now. Please find them in my figures. There are 2 kinds of diff lock in RC: 1. Lock the insider diff gears; 2. Lock the Axle shaft in one side to the Bevel Gear. I choose the second one. Since the diff house room is very limited. To achieve this, first I need to made 2 components in the factory. 1. Heave Metal Diff-case You should buy the diff gear suits from Axial. Or easily, some other gears could be used on Wraith too. 2. Moving Locker Ring It is thought the shaft. and it could move on the shaft. and it will lock with the diff-case to lock the diff finally. Some additional tasks: 1. draw a 1~1.5mm hole on the shaft. 2. made a pull stick. Here is the inside assemble figures: Before assemble, we should draw in the diff house. the locked state: the unlocked state: with the diff cover: The next part is how to control it by a servo. I did it like this: In the last, the hole on the axle should be covered. It is OK soon. I will upload the video then. test video is here: http://s1264.photobucket.com/albums/...t=f0f31542.mp4 If you understand Chinese, you may refer this thread. it is more detail. RCFans.com - Powered by Discuz! Thank you. Last edited by hzh007; 06-18-2012 at 09:34 PM. Reason: update the video |
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06-16-2012, 07:33 PM | #2 |
Rock Crawler Join Date: Jul 2009 Location: Victoria Australia
Posts: 891
| Re: My DIY remote control diff lock for Wraith
Great idea but it looks as though when it's unlocked it will only drive one wheel, is this the case or does it still drive both wheels.
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06-16-2012, 08:23 PM | #3 | |
Newbie Join Date: May 2012 Location: Beijing
Posts: 17
| Re: My DIY remote control diff lock for Wraith Quote:
But I could promiss it works well. There are 4 diff gears inside the diff-case that i did not post out. When it unlocked, both wheels could move with different speed. When it locked, just like the original one. | |
06-16-2012, 08:48 PM | #4 |
Newbie Join Date: Jan 2012 Location: Kamloops
Posts: 48
| Re: My DIY remote control diff lock for Wraith
Hate to say it but if you have 4 spider gears in differential carrier and you are disconnecting/connecting an axle shaft with the locking collar what you are doing is selecting between 2 wheel drive and 4 wheel drive open differential modes (3 wheel drive in a low traction situation assuming a fully locked rear diff) similar to many modern 1:1 front axle setups. with locking collar disengaged you will have no drive power being applied to either front wheel
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06-16-2012, 09:03 PM | #5 | |
Newbie Join Date: May 2012 Location: Beijing
Posts: 17
| Re: My DIY remote control diff lock for Wraith Quote:
in the rear, it will be locked and unlocked. Please notice the pin in the shaft, it will make the shaft sync with locking collar. when it locked, shaft A will lock with the diff-case. the spider gears inside will not move, so the shaft B will sync with A too. And with lubricating oil, it will not lost too much Torque when it locked. So it always 4WD. not 2, 3, WD. I have an DIG system, that is another story. Thanks for reply. | |
06-16-2012, 10:22 PM | #6 |
Gold Star Baby! Join Date: Jan 2011 Location: SOUTH JORDAN, UT
Posts: 1,245
| Re: My DIY remote control diff lock for Wraith
I can tell you right now, that what you installed won't last very long at all. And who would want to take a capable locked up rig and give it a diff? I don't take my rig to Moab and brag about having an open diff, it isn't something I'd want to have in my Wraith or my Jeep. I don't see a very big market for this. Why in the hell would anyone want to take a capable rig like the Wraith and give it a handicap like this. The only reason why you'd want a selectable locker in the first place is to have less stress on the steering ..... my Wraith and every Wraith out there can with stand the very little stress this makes on the steering. Sorry but I am not a fan of taking a nice strong locker and axle have something that looks very weak put in its place.... All for what?? You're goin to have more disadvantages then advantages...... its just another thing to fix when it breaks. And that is a when and not an if. It will break..... good luck with that. |
06-17-2012, 01:29 AM | #7 |
Quarry Creeper Join Date: Aug 2011 Location: Spalding, Lincs, UK
Posts: 235
| Re: My DIY remote control diff lock for Wraith
I can see your idea behind this and it's a clever bit of engineering, but I don't think you'll need it unless your truck weighs so much that your tyres can't slip when they need to. Your weak spot will be the pin in your drive shaft, I don't think it will last very long. Very clever though. |
06-17-2012, 01:34 AM | #8 |
Rock Stacker Join Date: Mar 2012 Location: Australia
Posts: 54
| Re: My DIY remote control diff lock for Wraith
Regardless of whether it works or not, lasts or not, at least he gave it a go, I am always amazed by people ingenuity on this site.
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06-17-2012, 01:49 AM | #9 |
Rock Crawler Join Date: Jun 2011 Location: San Diego
Posts: 698
| Re: My DIY remote control diff lock for Wraith |
06-17-2012, 04:53 AM | #10 |
Quarry Creeper Join Date: Aug 2011 Location: Spalding, Lincs, UK
Posts: 235
| Re: My DIY remote control diff lock for Wraith
It will work as he's described, unlocked the internal diff gears work as normal, allowing the shafts to spin at different speeds, locking it up means the shaft with the lock is pinned, but the other shaft is locked through the actions inside the diff s the gears are held in place by the diff case. This is what I meant about all of the strain going through the modded shaft pin. I'm sure with a proper engineering shop this could be made a bit more ressiliant but hats off to you for a great design and installation. |
06-17-2012, 07:11 AM | #11 |
Newbie Join Date: May 2012 Location: Beijing
Posts: 17
| Re: My DIY remote control diff lock for Wraith
Hi, guys. It could work. With update the firmware of GT3B, now I have 6 channels to control my Wraith. For this locker, I use the Multi-Position function. the advantage is this strategy is easy. the advantage is it will waste some power because the friction. But it is tiny. My diff-case and locking collar are made by Stainless steel. it is really hard and stable. it will work a long time. I am not a business man. I made this just for my personal style of playing Wraith. Because, 95% of the time, it needs diff. Only 5%, it need to lock the diff. I want it could steering stably. it needs the diff just like the 1:1 vehicle. The front will always be free. the middle and rear may need locked sometimes. that is the propose I made it. Thank you. |
06-17-2012, 07:14 AM | #12 | |
Newbie Join Date: May 2012 Location: Beijing
Posts: 17
| Re: My DIY remote control diff lock for Wraith Quote:
My English is poor to give the accurate explanation like you. | |
06-17-2012, 07:52 AM | #13 | |
Scale Detail Engineering Join Date: Apr 2010 Location: Turtle Island
Posts: 5,573
| Re: My DIY remote control diff lock for Wraith Quote:
I like an open diff. I run open diff in my 2 fast rigs: My FOFF rig and my basher rig. And I run a locked diff in my 2 slow competition rigs. You have done a great job! | |
06-17-2012, 09:06 AM | #14 |
Quarry Creeper Join Date: Aug 2011 Location: Spalding, Lincs, UK
Posts: 235
| Re: My DIY remote control diff lock for Wraith
You're welcome, your English is better than my, well any other language actually. I love finding these scale engineering masterpieces, and peoples ingenuity with their designs. Much better to have an idea, build it and try it out than just bolting bits on. |
06-17-2012, 10:18 AM | #15 |
Newbie Join Date: May 2012 Location: st augustine
Posts: 4
| Re: My DIY remote control diff lock for Wraith
Great work! I think its a great idea. Perfect for a trail rig..in the full scale world most trail trucks are not fully locked up all the time. Often they run selectable or automatic lockers such as ARB or detroit EZ. I bet it turns awesome unlocked. I would love to see you test the turning radius locked vs. unlocked on a high traction surface. May not be a huge difference as you are running the front open all the time but i bet it is still very noticeable. |
06-17-2012, 10:31 AM | #16 | |
Newbie Join Date: Jan 2012 Location: Kamloops
Posts: 48
| Re: My DIY remote control diff lock for Wraith Quote:
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06-18-2012, 09:31 PM | #17 |
Newbie Join Date: May 2012 Location: Beijing
Posts: 17
| Re: My DIY remote control diff lock for Wraith |
06-19-2012, 12:14 AM | #18 |
Quarry Creeper Join Date: Aug 2011 Location: Spalding, Lincs, UK
Posts: 235
| Re: My DIY remote control diff lock for Wraith
looking good, now it's time to test it out in the wild
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06-19-2012, 12:23 AM | #19 |
Newbie Join Date: May 2012 Location: Beijing
Posts: 17
| Re: My DIY remote control diff lock for Wraith |
07-06-2012, 01:41 AM | #20 |
Rock Stacker Join Date: Feb 2011 Location: NSW, Australia.
Posts: 58
| Re: My DIY remote control diff lock for Wraith
Well done. I admire your ingenuity. I'd like to see a Lock-Rite type locker. They're so simple, it suprises me that no one has made an R/C Lock-Rite yet. (unless I've just never found one) |
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