cable operated dump trailer

[Army grunt]

I am using a 12 volt winch to rase my dump trailer. Thought i would share.
Army Grunt

 

[Dmace]

Interesting, the frame looks good so far. I'm curious how your going to get the cable to lift the dump. Are you going to mount the winch high or have a single pulley mounted high with the winch line running over it...?

 

[RobS]

Or have the winch on the tongue and pull forward on the hoist linkage?

 

[Oliver1655]

In the first picture you can see the cable hooked thru and eye so my guess would be he will have a bar sticking up with a pulley on top.

Since you plan to use a winch, why did you add a scissor hinge? Is it for stability or to allow for hydraulics in the future?

 

[Grut]

I wonder if the cable will be attached or run through the center post of the scissors hinge, that would make it lift if the winch was mounted on the tongue, pending the angle used.

 

[Iplayfarmer]

I am using a 12 volt winch to rase my dump trailer. Thought i would share.
Army Grunt

I LOVE your hinges. That's my kind of design creativity.

The trailer looks well engineered. I too am eager to hear your reasoning for the scissor mechanism in the middle. It looks like you made provisions for future improvements with that bracket on the side too.

Please keep us all posted on your progress. This looks like it will be a good build.

 

[Army grunt]

The scissor hinge was for a hydrolick set up from a old Tommie lift, it was really bad a didn't have enough through. so i am going to pull from the center pin with the winch. i am building a gang(3 to 2) block an tackle to accept 14" cable I am using 3" pulleys for this. Today I plan on sawing up a oak log for the trailer floor an sides.A friend is working on the tailgate trip.Time is a factor I leave to go to long island to get a "Veterans Service Dog" in a week or so.So Ill be stopping again.Its very close to taking over to his shop an sandblasting it.Ill more as time goes on,Tks. for the interest.
Army Grunt

 

[easygo]

I LIKE IT !!! Looks like you cut apart something else to make the trailer and that earns you a brownie point in my book.

Just an idea. You might want to add some sort of a stop to the scissor mechanism so you would not pull it too far and over to the other side. That could result in a trailer bed come crashing down onto the frame. I would guess that it will be a slow lift with the 3 to 2 block and tackle but still it does not hurt to be careful.

 

[Army grunt]

easygo
Almost everything is "recycled" on the trailer.
yes a stop is planned, all i was going to do is put a short length of chain to stop any over pull.tks for input
Army Grunt

 

[Army grunt]

I sawed a clear red oak log up into the planking I plan on using for the floor an sides of my dump tr.
Army Grunt

 

[needtobuildmore]

I sawed a clear red oak log up into the planking I plan on using for the floor an sides of my dump tr.
Army Grunt

I've heard that white oak weathers a LOT better than red oak. How are you going to treat it to prevent rot?

 

[weedpharma]

I am not a mechanical engineer so I ask those more knowledgable to comment on my thoughts.

The scissor hinge looks as though it comes to almost closed when it is down. If the centre pin is pulled, it appears to me that virtually all the force goes to pulling the hinge towards the drawbar and very little to actually opening the hinge. As the hinge opens, more and more of the force then gets applied to lifting the trailer bed until the hinge is nearly fully open when nearly all force is lifting the bed.

This makes me think that a very large force is going to be necessary unless the scissor is open at least say 30 deg when the bed is down.

Even on the scissor jacks supplied with cars, the jack is fairly open before any lifting takes place.

Weedpharma

 

[SleazyRider]

I'm curious to see how this trailer turns out. You have a nice project going on. Nice hinges, BTW.

Bob

 

[Just2quickz28]

I have a tilt / dump 4x8 trailer that I always wanted to add a mast to to make a cable dump trailer. Something along the lines of the NovaJack trailers

NovaJack

Keep us posted on how it your design works out

 

[Army grunt]

(The scissor hinge looks as though it comes to almost closed )It comes close, but its still open .there's alot of fores to start the pull then it gets less an less.
A good friend has designed a (5pully) block& tackle that will take 3" pulleys an 1/4" cable.Its at the place that will plasma cut it.Ill be gone up north to get my veterans service dog this weekend so Ill not post anything for a month or so.Ill be in training with her for 2 weeks.Ill keep you guys posted.
Ill treat the oak with Thompson water seal.
Army Grunt

 

[easygo]

Thanks for the update. I too am following your build with much curiosity as I might have time this fall to start work on a small dump trailer. It's been on my to do list for about two years now.

 

[Army grunt]

Katie an I graduated from school. We are spending a few weeks in Ct. then back to Ga. an resume work on trailer.Ill keep you posted.
Army Grunt

 

[BruceWard]

Good work, thank you for your service!

 

[LD1]

Just now saw this post.

It is very interesting. But I am having my doubts that you will be able to get it to dump without some other way of getting that scissor started.

I would be curious to know what some of your measurements are with the trailer down. For example, what is the length from pin center to pin center for the upper and lower scissor arms?? Also what is the distance between the upper center and the lower pin center when closed.

Just guessing from the sketches but to give you an idea, an upper and lower arm length both being 16" and 4" between the pins in the front when lowered would require 14 times the amount of weight over the hoist to lift.

So say a 1000lb trailer with a 3000lb load would need 14*4000=56000lbs of force just to get the scissor started. Because as stated, when starting out, most of the load is not trying to lift, rather pull straight forward.

Needing that much force would require some pretty heafty pivots and hefty anchor points for the cable.

Again, this is just an example guessing at the measurments from the pics.

Another area of concern of mine would be the rear pivots. It looks like driveshaft yokes. I have never used them for something like this so I am curious as to how well they will hold up.

Good luck with the build. If you do decide to go with a hydraulic lift, you already have 90% of the work done.

 

[srs]

Good work, thank you for your service!

I second what Bruce said.