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Yikes! I accused myself of not thinking things through so I'll bash myself before anybody else does. I'm not certain if indexing cylinders are used where cylinders are connected in parallel and the lightest load moves first rule prevails. I heard of them once in passing but it was a platform idea. I'm mostly interested in figuring out what they are.
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Hey Murphy, we survived the night with no disruptions in the force! Here is a challange.... how about a top link where the body (female threads) is turned via a high torque 12 volt motor? The concept might be like what is used on powered camper jacks I would imagine.
It sure would save a lot of time and money compared to re-plumbing the hydraulic system and adding valves and hoses to an already over crowded area on a small CUT.
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bnr, the lift is not that complicated, or expensive to build, and it's being worked on presently, a friend of mine who makes portable bandsawmills has developed a prototype which goes behind a pickup for a buddy of his who is a structural steel welder. The problem is to achieve approval from UL, etc., so that it can be widely used in commercial applications and that costs so much you have to build in big expenses taking it back to being expensive.
Art, the driveway maintainer is good idea, and if done well could be pitched as a business opportunity for the buyer.
The multi-spindle cutter is another good idea but the multiple spindles mean multiple gearboxs, which means a lot more money. Aside from all that the offset (front to back) of the two sets of blaldes required to allow them to miss each other would eat up any savings in depth created by the multi-spindle concept. I also think the extra weight of the drive-train would negate the effect of bringing it in closer.
Tom, I'm not sure what you mean by 'indexing' cylinders, any time I have seen cylinders working together they have been regulated by one of two devices.
The first is a 'load sharing' device, this type of valve splits the hydraulic flow EXACTLY in two components, each doing equal work. Notice I did not say "in half" that is because you could in theory use this type of valve with two DIFFERENT sized cylinders, but still achieve a balanced work load. This is what you would want in a FEL or lift platform use, it would prevent the lighter loaded cylinder from getting all the fluid and therefore extending out of balnce with the other one.
The second type is a 'priority type' device, this is basically a sequencer for hydraulics, it gives no fluid to the secondary port until the primary port reaches a pre-determined pressure, and the opposite when the flow is reversed, the primary port gets no flow until the secondary reaches the set pressure point. This type of device is used for things like tilt-bed trucks, it prevents the load from being transfered to the rear axle until the 'landing gear' is down to support the weight and prevent an overload on the rear suspension, likewise in reverse it would not allow the 'landing gear' to go back up until the deck was fully retracted.
Clear as mud, huh?
Best of luck.
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Mark, you slipped up the middle while I was replying to the earlier posts.
An excellent idea, I will have a go at it for sure, even if it was such that the implement had to be lowered in order to ake the adjustment it would be better than getting off the machine and wrestling with a manual one.
May the force be with us !!!!
Best of luck, too.
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Hmmm..... how about a top link that ran like a floor jack..... a couple of pumps on a handle shortens it and a little bleeder valve gives it more length?
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You know, Marks idea gave me an idea. What do you think of an electric actuator. Something similiar to an airfoil actuator. Basicly a simple electric inline linear actuator such as used on wing flaps or helicopter stabilators would do the trick. Most run off of 28 volts DC but should be available in 12 volt versions. A used or retire actuator might be had for a very reasonable price. For CUT use, it should be strong enough for blading and other similar use.
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I bought my tractor used with various attachments, including a 3PH log splitter, and a dump wagon. Any idea how I can have both of these attached to the tractor at the same time? (Like a draw bar "extension"?)
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Mark, I like the 'pump version' even better, it is easier and more likely to develop the necessary pressures required to tilt a heavy implement, like a box-blade. I would do it a little different though, I would use a traditional hydraulic top-link, but mount a small hand pump & reservoir on top. If it was positioned carefully you could swivel around and pump it from the seat, or mount it remotely, on the fender say, and control it as if it were a regular remote valve.
Blueman, this is an easy one, the only limiting factor is that the further back the load is carried, say behind your splitter, the more the load, like the tongue of your dump wagon, effectively weighs. This can be at least partially ovecome by mounting large heavy caster wheels under the tongue. Another way would be to mount the splitter ON the dump wagon, therby using one item to carry the other, you would only need to extend the lines to the splitter, or plump them together. Since the dump wagon is probably used to carry the wood this is probably the easiest way to do it.
Best of luck.
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Murf, if staying with the Bush Hog 84T design the second gearbox is just a ninety which means you don't need a offset with the shaft drive. Those style driveway amintainers are quite common.
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I may have straightened out the indexing cylinder buz. I found cylinders described as re-phasing cylinders on the Cross Site. The site describes them as 'volumetrically matched for series use and automatically re-phasing when the pistons reach full extension.' That's sounds in the ball park of a discussion about 5 years ago on the antique tractor site but I'm pretty sure the term indexing was used. If that's true no wonder I haven't been able to find the term since then.
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