RCCrawler Forums

craigrobbo · 08-10-2008, 01:08 PM

Sorry i think i put this in the wrong section originally.

Hey guys

Im wanting to make a hydraulic rig. now steering i can muster up and make this without much problem at all. now i want hydro motors but cant find much one the pump/motor system is there any diagrams and/or useful info on this kinda thing, iv seen a video of one on utube but no real info on it.
Thanks

Craig

craigrobbo · 08-12-2008, 06:31 AM

21,520 members and not one reply?

WheelChair · 08-12-2008, 07:37 AM

I think on this one, if you want it driven by Hydraulics, you are going to need to design and build the motors yourself.

A hydraulic motor is basically the same as a hydraulic pump.

No one makes anything that small as far as motors because its not going to be very efficient. I donno you may find something but I doubt it.

The parasitic loss of converting from electrical mechanical motion to hydraulic back to mechanical is going to kill any runtime you hope to have.

Cool Idea, just not sure how practical it would be.

Don't let me stop you though, if this is really what you want to do, then you should and I support you!

Would love to see your fully hydraulic crawler.

You have seen the scorpion on here with hydro steer front and rear right?

WC

Scattman · 08-12-2008, 07:57 AM

JIA has hydraulic steering on one of his rigs. Works very well and sounds awesome too.

A_Jeeper · 08-12-2008, 09:45 AM

maybe check out the pumps for water cooled computers. I think they are small, but I don't remember.

craigrobbo · 08-12-2008, 12:24 PM

Everything is goin to me made from scratch motors pumps etc, the pump i intend to use a screw pump as for the motor im just not 100% sure on principle if peeps can gimme some ideas i can have a good crack at it.

Thanks

EGRESSor · 08-12-2008, 12:32 PM

http://home.planet.nl/~brink494/frm_e.htm

reddevildemo · 08-12-2008, 12:34 PM

Try this sight, we use some of them at work.

http://www.whitehydraulics.com/

reddevildemo · 08-12-2008, 12:37 PM

oh ya, this will be hard to do. You will need some way to power the Hyd pump ie and electric motor? the pump suplies the fliud under pressure to the hyd motor which inturn will go to a gearbox of some sort.

Personaly I think it will be cool but not too useful. Just my 2 cents. Good luck and keep us posted on how you do.

racerx · 08-12-2008, 01:08 PM

I work with hydraulic powered equipment every day and most if not all go through some serious gear reduction box's before finally getting to the tires. A lot of them have gear reduction hubs AND a differential type gearbox. It could be done if you have the ability/ equipment to build some of the parts yourself and don't mind a bunch of trial and error. Good luck... I would like to see this work! I know it won't be practical for a comp rig or anything but cool none the less.

craigrobbo · 08-12-2008, 02:34 PM

its not for compotiten, pure bashing about, the basis of it will be a gmade stalth crawler, made large scale longer links talkin FG marder size.
It will have the following when done
2x55t motors to power the pumps to power the hydro motors
indepentant wheel hydraulic disc break
front and rear independant hydraulic steering
Its gona need powerfull servos and motors and alot of space to put it all but man the power will be immence, if hydro motors put out the power anthing close to hydro breaks its gona tear holes in the rocks!!

clod driver · 08-12-2008, 02:50 PM

what is the point you are going to have to run a electric motor puting all of that hidro crap in there is just one more thing to go wrong.

craigrobbo · 08-13-2008, 11:18 AM

Quote:

Originally Posted by clod driver

what is the point you are going to have to run a electric motor puting all of that hidro crap in there is just one more thing to go wrong.

POWAR!!! plus its a nice little project.

craigrobbo · 08-13-2008, 11:28 AM

Im thinking this design

EGRESSor · 08-13-2008, 12:11 PM

want power ...
look for a small automotive power steering pump

oberon crawler · 08-16-2008, 04:32 AM

1st, If you are going to run hydro drives you won't need disc brakes!!
if your motors are a displacement type like a gear motor in your diagram and you stop the oil flow the shaft won't turn. so all you need are valves not discs.

2nd, if you are running your pumps from 55t motors and your wheels and steering is all hydro then you won't get any more power than if you just ran the 55t's through gearboxes to the axles.
Infact you can expect less power as there will be more losses and inefficiency in your hydro system than there would be in a gear drive.

It would be nice for show but not very practical, good luck anyway.

craigrobbo · 08-19-2008, 06:55 AM

hmm ill have a look into that, i want disc breaks coz they look cool really tbh hehe im not 100% clued up on hydros

Andsetinn · 08-23-2008, 12:17 PM

Quote:

Originally Posted by craigrobbo

but man the power will be immence, if hydro motors put out the power anthing close to hydro breaks its gona tear holes in the rocks!!

The funny thing about energy or power is that you can not create power out of nothing and no power conversion is 100% efficient. Every time you convert power (from chemicals inside the battery to electricity in the wires to motor movement to hydraulic pressure to hydraulic fluid flow to motor movement) you lose some power. The reason that current cars use gearboxes and drive-shafts is that it is considered the most effective and simple way to get power to the ground.
I don't know what hydro breaks is, if it's brakes or cutters or something else. All hydraulic drive-trains I know about are for huge vehicles where drive-shafts or gearboxes simply can't withstand the forces. Hydraulic drive-trains are not energy efficient, you can reduce the losses womewhat with wire-reinforced hoses and using pipes instead of hoses whenever you can, but you'll still have huge power losses.

Try this and this thread for ideas on hydraulic systems.

I love to be proven wrong. Please do that

.

JasonInAugusta · 08-23-2008, 12:42 PM

http://www.youtube.com/watch?v=39yHVxvKHiM

Get your wallet out...

http://www.leimbach-modellbau.de/

Pumps: http://www.leimbach-modellbau.de/HydrPump.html

Valves: http://www.leimbach-modellbau.de/Steuerventile.html

Cylinders: http://www.leimbach-modellbau.de/Zylinder.html

Mini Pumps: http://www.leimbach-modellbau.de/MiniHydrPump.html

Mini Valves: http://www.leimbach-modellbau.de/MiniSteuerventile.html

Leimbach used to have Challenger Hobbies out of NY as a US importer of their parts. For whatever reason Challenger stopped carrying the Leimbach stuff. Word I got was that Leimbach found it to be too much of a hassle.

At the time I got mine the only way to do so was to purchase on the local (German) economy. I found a way around that, spent $800, and had my parts soon enough.

MAYBE Stefan at www.scaleoffroad.de (or www.scaleoffroad.com) can get some on the German economy and ship the parts to the US.

As of now my Scorpion is still the only scale crawler with a full-on hydraulic steering system.

08-10-2008, 01:08 PM	#1
craigrobbo Quarry Creeper Join Date: Aug 2008 Location: Salford, UK Posts: 266	Hydraulics Sorry i think i put this in the wrong section originally. Hey guys Im wanting to make a hydraulic rig. now steering i can muster up and make this without much problem at all. now i want hydro motors but cant find much one the pump/motor system is there any diagrams and/or useful info on this kinda thing, iv seen a video of one on utube but no real info on it. Thanks Craig

08-12-2008, 12:37 PM	#9
reddevildemo RCC Addict Join Date: May 2008 Location: Green Bay Posts: 1,138	oh ya, this will be hard to do. You will need some way to power the Hyd pump ie and electric motor? the pump suplies the fliud under pressure to the hyd motor which inturn will go to a gearbox of some sort. Personaly I think it will be cool but not too useful. Just my 2 cents. Good luck and keep us posted on how you do. Last edited by reddevildemo; 08-12-2008 at 12:38 PM. Reason: oooops

08-12-2008, 02:50 PM	#12
clod driver Rock Stacker Join Date: May 2008 Location: milpitas, CA Posts: 93	what is the point you are going to have to run a electric motor puting all of that hidro crap in there is just one more thing to go wrong. Last edited by clod driver; 08-12-2008 at 02:53 PM.

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08-12-2008, 06:31 AM	#2
craigrobbo Quarry Creeper Join Date: Aug 2008 Location: Salford, UK Posts: 266	21,520 members and not one reply?

08-12-2008, 07:37 AM	#3
WheelChair Winner of the '07 RCC dumbass award! Join Date: Nov 2006 Location: Up on a Mountain, out in the Woods Posts: 661	I think on this one, if you want it driven by Hydraulics, you are going to need to design and build the motors yourself. A hydraulic motor is basically the same as a hydraulic pump. No one makes anything that small as far as motors because its not going to be very efficient. I donno you may find something but I doubt it. The parasitic loss of converting from electrical mechanical motion to hydraulic back to mechanical is going to kill any runtime you hope to have. Cool Idea, just not sure how practical it would be. Don't let me stop you though, if this is really what you want to do, then you should and I support you! Would love to see your fully hydraulic crawler. You have seen the scorpion on here with hydro steer front and rear right? WC

08-12-2008, 07:57 AM	#4
Scattman Official Cook of the ECC Join Date: Dec 2005 Location: Hawthorne, Florida Posts: 2,653	JIA has hydraulic steering on one of his rigs. Works very well and sounds awesome too.

08-12-2008, 09:45 AM	#5
A_Jeeper Pullman Crawler Join Date: Jul 2007 Location: Pullman Posts: 497	maybe check out the pumps for water cooled computers. I think they are small, but I don't remember.

08-12-2008, 12:24 PM	#6
craigrobbo Quarry Creeper Join Date: Aug 2008 Location: Salford, UK Posts: 266	Everything is goin to me made from scratch motors pumps etc, the pump i intend to use a screw pump as for the motor im just not 100% sure on principle if peeps can gimme some ideas i can have a good crack at it. Thanks

08-12-2008, 12:32 PM	#7
EGRESSor RCC Addict Join Date: Jan 2005 Location: Germany north Posts: 1,669	http://home.planet.nl/~brink494/frm_e.htm

08-12-2008, 12:34 PM	#8
reddevildemo RCC Addict Join Date: May 2008 Location: Green Bay Posts: 1,138	Try this sight, we use some of them at work. http://www.whitehydraulics.com/

08-12-2008, 01:08 PM	#10
racerx I wanna be Dave Join Date: Sep 2005 Location: R.I.P. Chip Posts: 2,024	I work with hydraulic powered equipment every day and most if not all go through some serious gear reduction box's before finally getting to the tires. A lot of them have gear reduction hubs AND a differential type gearbox. It could be done if you have the ability/ equipment to build some of the parts yourself and don't mind a bunch of trial and error. Good luck... I would like to see this work! I know it won't be practical for a comp rig or anything but cool none the less.

08-12-2008, 02:34 PM	#11
craigrobbo Quarry Creeper Join Date: Aug 2008 Location: Salford, UK Posts: 266	its not for compotiten, pure bashing about, the basis of it will be a gmade stalth crawler, made large scale longer links talkin FG marder size. It will have the following when done 2x55t motors to power the pumps to power the hydro motors indepentant wheel hydraulic disc break front and rear independant hydraulic steering Its gona need powerfull servos and motors and alot of space to put it all but man the power will be immence, if hydro motors put out the power anthing close to hydro breaks its gona tear holes in the rocks!!

08-13-2008, 11:28 AM	#14
craigrobbo Quarry Creeper Join Date: Aug 2008 Location: Salford, UK Posts: 266	Im thinking this design

Sponsored Links

08-13-2008, 12:11 PM	#15
EGRESSor RCC Addict Join Date: Jan 2005 Location: Germany north Posts: 1,669	want power ... look for a small automotive power steering pump

08-16-2008, 04:32 AM	#16
oberon crawler Pebble Pounder Join Date: Jul 2008 Location: Australia Posts: 151	1st, If you are going to run hydro drives you won't need disc brakes!! if your motors are a displacement type like a gear motor in your diagram and you stop the oil flow the shaft won't turn. so all you need are valves not discs. 2nd, if you are running your pumps from 55t motors and your wheels and steering is all hydro then you won't get any more power than if you just ran the 55t's through gearboxes to the axles. Infact you can expect less power as there will be more losses and inefficiency in your hydro system than there would be in a gear drive. It would be nice for show but not very practical, good luck anyway.

08-19-2008, 06:55 AM	#17
craigrobbo Quarry Creeper Join Date: Aug 2008 Location: Salford, UK Posts: 266	hmm ill have a look into that, i want disc breaks coz they look cool really tbh hehe im not 100% clued up on hydros

08-23-2008, 12:42 PM	#19
JasonInAugusta 06 Super National Champ Join Date: Jun 2004 Location: Stark Industries Bar and Grill Posts: 11,361	http://www.youtube.com/watch?v=39yHVxvKHiM Get your wallet out... http://www.leimbach-modellbau.de/ Pumps: http://www.leimbach-modellbau.de/HydrPump.html Valves: http://www.leimbach-modellbau.de/Steuerventile.html Cylinders: http://www.leimbach-modellbau.de/Zylinder.html Mini Pumps: http://www.leimbach-modellbau.de/MiniHydrPump.html Mini Valves: http://www.leimbach-modellbau.de/MiniSteuerventile.html Leimbach used to have Challenger Hobbies out of NY as a US importer of their parts. For whatever reason Challenger stopped carrying the Leimbach stuff. Word I got was that Leimbach found it to be too much of a hassle. At the time I got mine the only way to do so was to purchase on the local (German) economy. I found a way around that, spent $800, and had my parts soon enough. MAYBE Stefan at www.scaleoffroad.de (or www.scaleoffroad.com) can get some on the German economy and ship the parts to the US. As of now my Scorpion is still the only scale crawler with a full-on hydraulic steering system.

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Thread: Hydraulics