Hydrostatic ATV
- Thread starter kdlklm
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kubotakid USA
Silver Member
Again I like the orignal design, First post last pic, shows the kneeling action, I would build it very simular, with the exception, that I would set the cylinder back, using a longer rod, Simular to the kneeling trailer pic, Ive had the ride factor pluged in from the start, and Iam leaning towards an independant supension, meaning not tying each axle together, with a cross tube, and using air cylinders, instead of hydraulic for the kneeling action, and ultimatly then I can use them for an AIR RIDE, Suspension, :thumbsup: simple to do, and very nice ride, you not only have air ride, but independant suspension, ta boot,:thumbsup: And my front axle would pivot at the articulating point, with shocks. Should result in a pretty nice ride. The false floor has many flaws and offers little. Eric
aczlan
Good Morning
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- Mar 7, 2008
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- 16,985
- Tractor
- Kubota L3830GST, B7500HST, BX2660. Formerly: Case 480F LL, David Brown 880UE
What if you used a short axle (such as for a jet ski trailer) as your pivot points (mount the swingarms where the wheels would go), used hydraulics for the lifting the axle and put a pair of accumulators (with solenoids to allow them to be shut off) on the lifting line of the cylinder?
That should allow you to lift the swing-arms and (if you also installed a pair of pressure gauges) you could set your ride height/firmness based on pressure.
Aaron Z
kubotakid USA
Silver Member
Air ride is much more sensitive, I thought about hydraulic accumulators, but buy the time you buy the accumulators, (2), and electric silinoids, and add the control valve, your spending sum real C@SH, and dont have the nice ride,air gives you, The 12 volt air compressor is going to run around 100-125 for good quality, and air valves,switches,fittings,gages, etc are CHEAP, and much eaiser to dial in the ride, Eric
Iplayfarmer
Super Member
The drawing was incomplete. I was picturing a system where the middle part had rails, etc. build up off of it. The rams could connect from a point on the upper rails to the swing arm.
mjncad
Super Member
I just came across this cool thread.
KDLKLM, are you using Inventor or Solidworks for your CAD program?
If you go with the false/hinged floor, how about DPOCV (Double Pilot Operated Check Valves) to keep hydraulic cylinder leak down and drift in check?
How about 12VDC linear actuators for the false/hinged floor? I've seen some at Surplus Center rated to 1,000 pounds. Using these for secondary systems such as the floor would be simpler and cheaper than hydraulics.
As KennyD is fond of saying, "The only thing cheap about hydraulics is O-rings and advice."
It sounds like the OP has highly limited mobility and will require as much electro/hydro/mechanical help as possible. Solenoids could be useful for lashing down his chair, etc.
My concern with the false/hinged floor is from the top the main frame looks like a large "C" and needs something at the front to latch securely to minimize racking laterally. How about an "R" (closest letter I could find) frame where the floor pivot is in the middle? This would give you two solid crossmenber points instead of one with the "C" configuration. Granted the slope for your chair will be steeper; but the fold up ramp could be designed with an angle to act as a transition from the chair deck to the ground.
Tracks may be cool; but I think they'll give you more grief getting them to function properly.
KDLKLM, are you using Inventor or Solidworks for your CAD program?
If you go with the false/hinged floor, how about DPOCV (Double Pilot Operated Check Valves) to keep hydraulic cylinder leak down and drift in check?
How about 12VDC linear actuators for the false/hinged floor? I've seen some at Surplus Center rated to 1,000 pounds. Using these for secondary systems such as the floor would be simpler and cheaper than hydraulics.
As KennyD is fond of saying, "The only thing cheap about hydraulics is O-rings and advice."
It sounds like the OP has highly limited mobility and will require as much electro/hydro/mechanical help as possible. Solenoids could be useful for lashing down his chair, etc.
My concern with the false/hinged floor is from the top the main frame looks like a large "C" and needs something at the front to latch securely to minimize racking laterally. How about an "R" (closest letter I could find) frame where the floor pivot is in the middle? This would give you two solid crossmenber points instead of one with the "C" configuration. Granted the slope for your chair will be steeper; but the fold up ramp could be designed with an angle to act as a transition from the chair deck to the ground.
Tracks may be cool; but I think they'll give you more grief getting them to function properly.
I think I've got something here, that I'm very happy with. I've taken bits and pieces of excellent advice from many different people. The linear actuator was something I've been thinking about for some time. I've got ones that I use several times a day, that I've had for 20 years and they still work as good as the day I got them. So I think they're a good option. The ones I put on here have a lifting capacity of 750 pounds. Which is more than enough. They would be so much simpler to install, not needing hoses, pumps and etc.
I haven't incorporated the ramp yet. I put a shaft going right through the floor which should give it a great deal of strength. But I'm just waiting to get some input on my progress so far. Let me know what you think.
Keith
I haven't incorporated the ramp yet. I put a shaft going right through the floor which should give it a great deal of strength. But I'm just waiting to get some input on my progress so far. Let me know what you think.
Keith
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aczlan
Good Morning
- Joined
- Mar 7, 2008
- Messages
- 16,985
- Tractor
- Kubota L3830GST, B7500HST, BX2660. Formerly: Case 480F LL, David Brown 880UE
Are they waterproof? One advantage to hydraulics or air is that they dont mind getting wet.
Aaron Z
Iplayfarmer
Super Member
Brilliant! Retractable wheels.