Backhoe Contribution – duerer – Wheels / Rear Axle

[Ingmar Franz]

Here’s an old version of the main body of my rear axle end housing with booleans (but only those for the bolt holes):

https://www.dropbox.com/s/bhpk4e9cvewafno/RearAxleEndHousing_OldBooleanVersion_4Juli2020.blend?dl=0

I’ve also cut out and magnified a drawing of this part from an earlier post in this thread which seems to show some kind of contour lines that can maybe give a hint on how to do a proper topology in order to match the exact shape:

[Shawn Blanch]

Yeah it looks like you struck gold those are nice hintful lines.

[Ingmar Franz]

So, here an update on my rear axle:

[Ingmar Franz]

One new part modeled (called “yoke”?) that can be seen from outside the rear axle end housing under certain angles:

File is here.

[Ingmar Franz]

Some alignments done. The most important is this one in order to avoid intersections:

[Ingmar Franz]

And that’s the newest version of my rear axle:

[Ingmar Franz]

Connecting the different parts of the gearbox especially certainly will bring a lot of fun 🤪.

[Shawn Blanch]

Am I reading that correctly? 10 million faces? Jeez you are a beast Ingmar!

I think it is really coming together quite nicely my friend!

[Ingmar Franz]

Yes, and Kent definitively will like that almost 10 million faces 😉😁! The new “yoke” part has already 2640 faces. And there’re two of them. Some parts are still too much subdivided where the “Subsurf Modifier” alone could do a good job (for example in the wheel hub and rim). But since this rear axle is really complicated, I don’t know how low I can push this.

[Ingmar Franz]

Off topic: Did they switch off here in the forum the redirection directly to a new reply? I have to search for “hours” as a workaround.

[Ingmar Franz]

I cut into gearbox using a technique by Josh Gambrell here (but my circle has 16 vertices instead of 12 in Josh’s tutorial)
and after this the shrinkwrap technique again for smoothing out distortions. The  shrinkwrap target uses one subdivision more than the shrinkwrapped mesh in order to remove even the most subtle shading issues.

Thanks to @spikeyxxx for this tip in the backhoe modeling forum here and thanks to @theluthier for his tutorial on this technique in the backhoe livestream #3 beginning here at 1:53:18.

The gearbox file is here.

[Shawn Blanch]

I love that tutorial by Josh. I used that A LOT on most of my cylindrical intersections. It looks quite nice. I also saw a tutorial by masterxeon001 here that covers a more complex case (I think he meant to make 2 different cylinders with different sides to teach the topic can apply whatever way you come across it): 

I do have a question @duerer how do you reference someone’s posting so that it immediately goes there? I really like that feature.

[Ingmar Franz]

Thank you, @blanchsb , for the link to masterxeon001’s tutorial.  

To your question: You reference a posting by right clicking on the date / time of the posting directly under the author’s name and then choosing the context menu’s entry for copying the link.

[Ingmar Franz]

I’m trying to join the small yellow pads  with my gearbox:

File is here.

The shrinkwrap targets are causing the z-fighting. The red target is only used for correcting distortions caused by the hole cut in for the protruding orange part. I’m referring in this post only to the pads on the two siderings. Only the left ring has the blue shrinkwrap target since the right ring is just created by mirroring.

[Ingmar Franz]

I’ve reshaped my rear axle end housing:

File with that part only is here.

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