PTO Winch ? 3 Pt Hitch post pounder.

[bob2299]

hello I would like to build a PTO Winch, and maybe they already exist, what I am looking for is a Winch that has feel fall,

my worries, is once the cable is all the way in how does it stop, and if I want to let it free fall once it's got the weight on on it How do I do this. the weight would be 200 to 300 pound's I don't think it need's to be heavier, and that might be a little to heavy.

Now I have some Idea's thanks to some of your idea's, but I wanted to improve on them, now here is a portion of an idea I borrowed.

Run my PTO shaft back to a jackshaft with two bearings on it. Make another shaft with a winch drum on it. made out of pipe, with drum sides cut out of plate steel. Belt drive from the PTO shaft to the winch drum shaft. Leave the belt a little loose and use a tensioning idler pulley that is hand operated. I would install a Slip clutch on the PTO shaft so if my cable is all the way in and I did not release the lever fast enough the slip clutch would engage,

once my lever is release the cable would be free, to avoid back lash when the cable is set free, I would install a plate that pushes on the cable inside the drum with a little spring tension so the drum does not start un-rolling and make a big "birds nest" of cable.

now can you adjust the tension on a slip clutch I was thinking of a WEASLER 1 3/8" X 6 SPL FRICTION CLUTCH, but does any one know if the tension can be adjusted on these clutches.

Now maybe I am over thinking, if this type of a winch already exist, and I can get a used one, it would have to be powered by my PTO, I would like to make a 3pt hitch Post pounder. and this would be the way to bring up the weight.
THNX.

 

[BHD]

there is a PTO post pounder that uses a friction wheel, that is engages by a lever, that pushes the weight up,
Danuser PTO Post Driver

Post Driver | Fence Post Driver | Danuser

here is an expired paten that uses a chain to lift with a belt slip clutch
https://www.google.com/patents/US33...a=X&ei=N5gvU4mtBo7OyAHH-ICwBw&ved=0CFcQ6AEwBQ

https://www.google.com/search?num=1...-1.1.0....0...1c.2.37.hp..0.1.279.mCVSNilrrds

If cable is your plan
I would think that one could put a cable clamp on the cable at the wind up point, and have the cable go through a slotted metal piece that would kick out the clutch, you would still have some control as if you keep pushing on the lever it would slip the belt at the correct balance

the other idea I would have is to weld a strip of roller chain on mast tube (riding on an inside tube), and have a sprocket that would be slowly turned by the PTO and engage that and have a taper piece or a block that would , on the rising tube that would disengage it when at the top of the stroke, I would think one could have it push up or pull down depending on the design
similar to the DR wood splitter or a SUPER SPLIT with the rack and pinion drive,
this you tube shows how the system disengages.
there is a PTO post pounder that uses a friction wheel, that is engages by a lever, that pushes the weight up,
Danuser PTO Post Driver

Post Driver | Fence Post Driver | Danuser

here is an expired paten that uses a chain to lift with a belt slip clutch
https://www.google.com/patents/US33...a=X&ei=N5gvU4mtBo7OyAHH-ICwBw&ved=0CFcQ6AEwBQ

https://www.google.com/search?num=1...-1.1.0....0...1c.2.37.hp..0.1.279.mCVSNilrrds

If cable is your plan
I would think that one could put a cable clamp on the cable at the wind up point, and have the cable go through a slotted metal piece that would kick out the clutch, you would still have some control as if you keep pushing on the lever it would slip the belt at the correct balance

the other idea I would have is to weld a strip of roller chain on mast tube (riding on an inside tube), and have a sprocket that would be slowly turned by the PTO and engage that and have a taper piece or a block that would , on the rising tube that would disengage it when at the top of the stroke, I would think one could have it push up or pull down depending on the design
similar to the DR wood splitter or a SUPER SPLIT with the rack and pinion drive,
this you tube shows how the system disengages.
http://www.youtube.com/watch?v=MpmuZwdlPrc
about 42 seconds in

http://www.youtube.com/watch?v=noGIMhMDfpU

really a hydraulic cylinder will dump very fast with a heavy weight attached to it, I do not see any problems with the one I built,
first part
http://www.tractorbynet.com/forums/build-yourself/289286-building-wood-post-driver-tractor.html
2ed part
http://www.tractorbynet.com/forums/build-yourself/292737-building-wood-post-driver-tractor.html


really a hydraulic cylinder will dump very fast with a heavy weight attached to it, I do not see any problems with the one I built,
first part
http://www.tractorbynet.com/forums/build-yourself/289286-building-wood-post-driver-tractor.html
2ed part
http://www.tractorbynet.com/forums/build-yourself/292737-building-wood-post-driver-tractor.html

 

[Tor Arne]

Here is one that I rebuilt from a fixed to a quick attachment. It is originally a Sandvik 3000 (3 ton) that I have welded expanded metal, 3 point mount and blade on. There's a brake so the wire can not free spol on the drum. It mostly consists of a spring-loaded flat iron that goes on the edge of the drum

 

[BHD]

been thinking some more about your project,

first your tractor does not need to be running full blast, so if you throttle it back the pto runs slower,

take a shaft, now put a lose drum on it on the shaft have a friction plate, possibly a section of a slip clutch, slide the drum on the shaft, create a leaver with a short arm at the pivot that will work like a tighter and slid over the drum to the friction material

you pull or push on the arm, slides drum makes contact with spinning plate and friction material, and turns drum, release and it drops, if you want some kind of "brake" to keep the drum from spinning I would think just some spring loaded flat iron would do it,

If one friction plate was not enough I would guess one could make like a slip clutch or a automatic transmission clutch with plate friction, plate friction plate,

(one time I saw a clutch that was more like a brake drum and shoes that the shoes were expanded by a cone the shoes spun and when expanded they made contact with the a brake like drum and spun he item being driven,

all I have to say is be careful because even a pto at idle will kill one, or dismember you, make the shields, USE them

 

[Roehm Farms]

A way it could be done, use a car/truck axle with an open differential and drum brakes. Drive the pinion with the pto, one side of the axle has a spool for the winch, the other side of the axle has a hand operated brake. When you apply the brake, the other side will turn and raise the weight. Release the brake and it will free fall. You can apply slight pleasure on the brake to keep the cable tight on the spool.

 

[jb92563]

Check this thread

http://www.tractorbynet.com/forums/build-yourself/35083-diy-post-driver.html#post392449