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Grapple Design
- Thread starter dtd24
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3RRL
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Oh man,
That looks COLD!
That looks COLD!
OP
dtd24
Gold Member
It was very cold. Starting to warm up now though. It was my first time plowing with her. It was fun for alittle while. Still like my plow truck better though. The heat works better. I will be resuming the grapple soon though!!
rdln
Veteran Member
I am sure your bucket is 6' wide and FWIW rule of thumb for mechanisms is 15deg angle when lines are drawn between pivots
sweet tractor
sweet tractor
OP
dtd24
Gold Member
so the 15 degrees is to eliminate the cylinder from sticking or fighting against itself?
toolaholic
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D T D on pix #2 ,tractors sideways, at the bottom of the f e l . the square tube end looks like it rotated out of it's weld. Am I wrong ?
OP
dtd24
Gold Member
Tool,
Are you talking about where the FEL mounts to the tractor? Does look strange, huh? When I first bought it, I thought the same. That is the way it sits on it. I even searched the internet for pics of other 1070's to make sure.
DaveD
Are you talking about where the FEL mounts to the tractor? Does look strange, huh? When I first bought it, I thought the same. That is the way it sits on it. I even searched the internet for pics of other 1070's to make sure.
DaveD
OP
dtd24
Gold Member
OP
dtd24
Gold Member
Well, I made the mock up with some luann plywood I had around. I found a design flaw 
. Better to find it now I guess. It can actually be seen on the final dwg, but I missed it.
http://www.tractorbynet.com/forums/...3d1170972778-grapple-design-grapple-final.pdf
The arm hits the 3" angle support stopping it from closing completely. I will be revising the design of the support bracket. Learned alot building the mock though. I can see it in a different light.
Heres some pics of the process. This web site has added the camera to my list of tools!!!
. Better to find it now I guess. It can actually be seen on the final dwg, but I missed it. http://www.tractorbynet.com/forums/...3d1170972778-grapple-design-grapple-final.pdf
The arm hits the 3" angle support stopping it from closing completely. I will be revising the design of the support bracket. Learned alot building the mock though. I can see it in a different light.
Heres some pics of the process. This web site has added the camera to my list of tools!!!
Attachments
IslandTractor
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dtd24 said:I found a design flaw
I betcha you could get away with just notching the arm where it hits the support bracket. That should not weaken the grapple much at all. If you are concerned about strength at that point you could just weld in a sister brace above the notch.
I'd still suggest widening the grapple to about half the width of your bucket.
rdln
Veteran Member
Yep, theres that and possible issues with the clevis on the cylinder end to the mount interference when full down. Make sure you have the cylinder in hand and recheck b4 cuttin steel.
also I am afraid the your bucket surface where mount is attached is going to flex and maybe bend when you are clamped down on sumpin, might want to stiffen bucket or add low setting relief valve or equivalent (I am not too hip on fluid power).
dave I sent you mpegs, cant attach to post
also I am afraid the your bucket surface where mount is attached is going to flex and maybe bend when you are clamped down on sumpin, might want to stiffen bucket or add low setting relief valve or equivalent (I am not too hip on fluid power).
dave I sent you mpegs, cant attach to post
OP
dtd24
Gold Member
Yeah, I have made an adjustment to the arm pivot bracket. I will revise my mock up before cutting the steel. Rdln, your mpeg is great!! Thank you so much. That is some kind of program you have!!!
rdln
Veteran Member
jmc
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rdln said:
Very nice, Steve. What are you using for CAD?
John
rdln
Veteran Member
thats unigraphics
OP
dtd24
Gold Member
Nice......I'm glad you were able to share it with everyone. I cut out the new pivots I designed for the mock. I will post new mock pictures soon as its done. Your animation fires me up to get this thing done. Still haven't really thought too much on the hydraulics yet, but I have been reading up on options.
3RRL
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Steve,
Where is the toothbar in your animation?
It ends up working like a mini rock grapple for the first six inches.
dtd24,
We are anxiously waiting.
Where is the toothbar in your animation?
It ends up working like a mini rock grapple for the first six inches.
dtd24,
We are anxiously waiting.
rdln
Veteran Member
thats the way the man wants it. I too have never used one, heck dont even have third function line on loader. Maybe on the next tractor
OP
dtd24
Gold Member
Rob,
I am workin on it. Work has been crazy lately. It's been cutting into my grapple time. Saturday, I will revise my mock up just to be sure it works.
Next step after that will be the scrap yard for metal.
I don't have a tooth bar on my bucket yet! They seem to be very useful though. Someone did mention I should get that first before I build the grapple so the grapple arms don't hit the teeth, but I don't know if I can pass both project costs through the Treasurer.
Her birthday is on Sunday, think she may want a nice shiny toothbar?
I am workin on it. Work has been crazy lately. It's been cutting into my grapple time
. Saturday, I will revise my mock up just to be sure it works.Next step after that will be the scrap yard for metal.
I don't have a tooth bar on my bucket yet! They seem to be very useful though. Someone did mention I should get that first before I build the grapple so the grapple arms don't hit the teeth, but I don't know if I can pass both project costs through the Treasurer
. Her birthday is on Sunday, think she may want a nice shiny toothbar?
3RRL
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- 55HP 4WD KAMA 554 and 4 x 4 Jinma 284
Hahaha,
Her birthday is on Sunday, think she may want a nice shiny toothbar?
That is one sure way to get yourself killed!
I think a really good birthday present just for her and some flowers works great. Then AFTER that you can run it by her sort of casually.
Another thing you can do is call Markham and ask what their teeth spacing is on a toothbar that fit's your bucket width. Or better yet, if you build your own, draw it up now with the number of teeth you want and fit your grapple between them. Usually 5, 6 or 7 depending on your bucket width. And adjusting the width of your grapple at this stage is no big deal.
Mine is a 72" wide bucket and has 7 teeth.
Her birthday is on Sunday, think she may want a nice shiny toothbar?
That is one sure way to get yourself killed!
I think a really good birthday present just for her and some flowers works great. Then AFTER that you can run it by her sort of casually.
Another thing you can do is call Markham and ask what their teeth spacing is on a toothbar that fit's your bucket width. Or better yet, if you build your own, draw it up now with the number of teeth you want and fit your grapple between them. Usually 5, 6 or 7 depending on your bucket width. And adjusting the width of your grapple at this stage is no big deal.
Mine is a 72" wide bucket and has 7 teeth.
