Trying to retrofit curl angle, need help.

[fusting]

Hi. my bucket curl angle was not eficient so I am in the process of trying to figure out the pivot geometry. What a nightmare, I have made a fullscale mockup of the boom , bucket, cylender brackets, and layed thm out on an old door, keeping the boom arm fixed. so I have the profile now and I am prety much playing hit and miss. I have checked out some othe linkage designs and tried applying them to my mockup but it sure is more difficult to get the geometry correct. Is there a formula or a starting point to calculate the pivot points? I have some projects to finish before the snow flies and I'de rather put the retrofit on t5he loader instead of going back to the near useless system that was threr before. Any tips or pointers?

 

[kennyd]

Welcome to TBN

Giving us the model loader and/or pictures will go a long way to getting great suggestions from the brilliant minds on TBN

In the mean time, take a look at THIS post from 3RRL (Rob) on how he did his Jinma loader.

 

[fusting]

Hi guys, I've been trying some more to come up with the right combo of pivots and decided to move the brackets on the boom arms and that is giving me an extra 6 or 7 deg. Also repositioning the bucket mounts helps as well, so progress is being made now that I abandoned the power pivot plan. That can wait till next summer as i plan to rebuild the entire boom assembly. It was origionally on a Cockshut 45hp and was modified for the Massey 1100, 93hp so allong the years there are a lot of patches and reenfocements all along the arms. 3 years ago I rebuilt all the mounting brackets, they also were starting to fold. I'll have to get some photos on this forum so yuo guys can see what I'm talking about. Thanks anyway this is a fantastic forum and I'm glsd I found it.

 

[Renze]

I'll have to get some photos on this forum so yuo guys can see what I'm talking about.

Yes you sure do !!

When i dont have pictures of a project, i try not to mention it here, because when they hear there's something, the crowd starts yelling "WE WANT PICS, WE WANT PICS"

 

[GE222]

Mathematically, one point should be used as a start reference. Then every other relative movement will be based on that same starting point. It is in simple terms, basic trigonometry. There will be a set of calculations, for each motion.

Think of it this way, when a loader arm is lowered to the ground, that could be the starting point. When the loader arm is raised, that will be the end point.

The end point will be based on the ram travel. In most cases a person doesn't need to consider what happens in between.

They are simple triangles with one side changing length (ram travel) , and the opposite pivot angle (loader arm) changing.

For example, when mechanical bucket leveling is added, the basic calculations are still the same; however, there are just more of them.

Another method which I have also done more than once, is making a wooden scaled movable mock up. This is great, as make it really easy to visualize and foresee and potential issues.

I hope this helps.