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Construction Equipment If it digs, pushes, hauls dirt "off road" post it here. |
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#1
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KOMATSU KAC960E Dump Truck
Hi guys, here i wanna share the build progress I've made. I did mentioned about it the another thread on my KOMATSU PC650 EXCAVATOR build that this will be my second build. Ideally I cannot copy similar 1:10 scale ratio as per my EXCAV, as it gonna be too big, thus, i scale it down to 1:20 scale, about 370mm in height, 780mm in length.
Here's the real one: And mine just past few weeks after some scratch works and CAD..here's the blueprints: Front axle.. Rear axle: using differential gears..customized Additional spec will be: hyd lift bucket, custom-made tires.. (more pictures will be added in my blog: http://my-rc-page.blogspot.com/) |
#2
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Re: KOMATSU KAC960E Dump Truck
Great looking CAD drawings , wish I could do draw like that too
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#3
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Re: KOMATSU KAC960E Dump Truck
Blame the Olympic, etc, kindda busy with other stuffs, ramp up in PROD market (my real job in semicond)...
Now adding the workhorse/powerplant...it's a full hyd function, rotor motor for the main drive and lift bucket...As seen in the CAD computer, yet to start fabrication, as to confirm real size and dimensions of the internal gadgets...(pumps, rotors, tanks, spool valves, servos, etc) PS: kindda busy mastering the skill to operate my KOMATSU PC650 EXCAV, refer video here for latest 'skill' that I have...lol http://www.youtube.com/watch?v=sPKtaNU2CpM http://www.youtube.com/watch?v=1lTR0ilKT6M |
#4
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Re: KOMATSU KAC960E Dump Truck
These are final CAD drawing, before sending to machine shops for metal cutting, then welding...assembling...should be fun..
Or refer here: http://my-rc-page.blogspot.com/ |
#5
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Re: KOMATSU KAC960E Dump Truck
nice drawings, looking forward seeing it being built.
Question, why this little odd location on tipping cylinders? Looks like it will be hard to get the body up last part since cylinder is working almost straight with body. Dan |
#6
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Re: KOMATSU KAC960E Dump Truck
Yes, i thought the same. Looks very good, but aren't the cylinders normally vertical on these type of dumpers?
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Elliot. |
#7
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Re: KOMATSU KAC960E Dump Truck
I never tire of viewing drawings like these. This looks like a very nice project. So if I read your post right, you're going to use a hydraulic motor to run the drivetrain?
Please add updates, as you get things built.
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Nathan |
#8
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Re: KOMATSU KAC960E Dump Truck
Quote:
You both have very sharp eyes, i thought i can run away with that. The lift hyd cylinder shud be mounted vertically the main chassis, but i have some small problem, i need to make space for two gigantic batteries as seen below..so i tried to mount the cylinder further to the rear end. On drawing, it should work, but of course i'll loose some lift power because of odd lifting angle. See pic below for the actual ones. I'll try to mod further during the assembly, plan to hide the cylinders better. |
#9
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Re: KOMATSU KAC960E Dump Truck
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Love to hear the hyd pump sounds + drivetrain, so realistic, unlike BL motors, i think. Wish me luck. |
#10
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Re: KOMATSU KAC960E Dump Truck
Redesign the lift cylinders for sure!
The lift angle is very-very bad. It pressurises other parts that shouldn't be involved in lifting + you lose so much lifting force. It seems that you have there some space But I really like your CAD drawings and look forward to see that working! |
#11
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Re: KOMATSU KAC960E Dump Truck
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This may sound crazy but how about mounting the cylinders on the back end of box and anchored to rear axle area? The cylinders would look like suspension cylinders.. Yes, that would be a 3rd class lever and not have as much lifting power but would be better than the horizontal position and cause less strain. Some smaller CAT trucks have the hoist cylinders inside the frame rails, but if your going with Hyd drive, I doubt there's going to be any room in there either Great looking pics, can't wait to see it come to life Mario |
#12
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Re: KOMATSU KAC960E Dump Truck
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You're right, and that's the plan that i hv too, like mount it on side wall of the battery covers or somewhat. I cant touch the axle, because i make such it will have some travel play to coop with unflat-terrain..some kind of dampening motion or suspension function...plan to customize own cylinders, so it'll have big lift capacity... I'll start cutting next week, hope to get good/quick progress here.. |
#13
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Re: KOMATSU KAC960E Dump Truck
hey from looking at the design would you be able to move the battery box further outward and mount the cylinders in between the box and the frame?
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#14
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Re: KOMATSU KAC960E Dump Truck
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I would recommend sorting out the placement of the cylinders, before the placement of the batteries. Cheers, AP |
#15
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Re: KOMATSU KAC960E Dump Truck
certainly great idea, will try to fit in my CAD drawing, that shud fit just nice I think, thx for the great ideas folks..
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#16
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Re: KOMATSU KAC960E Dump Truck
I see from drawings that it looks like you're using a servo for steering?
The steering axle always seems way overloaded on these types of scale model trks that servos struggle to steer in soft ground. Would there be room for a third valve in your design for hyd steering?
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Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get! Joe |
#17
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Re: KOMATSU KAC960E Dump Truck
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Thx Joe, another superb input, appreciate that! |
#18
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Re: KOMATSU KAC960E Dump Truck
looks like we all come up with some good ideas to help out a felow builder
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#19
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Re: KOMATSU KAC960E Dump Truck
where do you get the cad program and how much toi purchase ?
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#20
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Re: KOMATSU KAC960E Dump Truck
hi every 1 just got my membership approved hehe looking forward to this for years lol
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