Biggest douche-mobile

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Double douche at the front door of the local subway, looked like a unmarked car with a crap tonage of front, visor, and rear deck lights. Walked inside and it was a local volunteer ff. Also I'm pulling my ghost trailer in the background.
 
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sgtbriangreen said:
View attachment 246778 Coming soon to a brodozer near you! The hitch that will break if you actually use it, but makes you look like a hardcore hauler.
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I had to go look this up out of curiosity.
I just can't imagine a scenario where it is really such a big deal to just replace the hitch.
 
CasterTroy said:
Worst idea ever

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You know I would actually pay good money for the entertainment that would ensue if @Fabrik8 would go to youtube and start analyzing this product in the comments.
Someone in the comments suggested the pin should be titanium so it wouldnt shear. Im sure it would play great with that aluminum body.
 
Ron said:
You know I would actually pay good money for the entertainment that would ensue if @Fabrik8 would go to youtube and start analyzing this product in the comments.
Someone in the comments suggested the pin should be titanium so it wouldnt shear. Im sure it would play great with that aluminum body.
Click to expand...

Uhhh.... Hmm. I don't comment on YouTube, but that thing has me scratching my head.

  • So all of the force (in any direction) is supported by at most two of those bolts in shear, and only if the load is distributed perfectly between them.
  • I hope there are sleeves on those bolts to act as pivots and set bolt tension, and to increase the bearing area on the aluminum pieces.
  • I hope the bolts don't have threads in the shear area.
  • I don't see any kind of sleeve on those shear pin holes, which doesn't make me feel good. I guess there's no room to sleeve them though.
  • Those shear pin holes are really closely spaced, and really close to the edge, both of which are not a good idea for high loads, but especially bad in soft materials.
  • I'm not as concerned about the pin shearing as I am about the holes for the pin. The holes are about 1.5 diameter apart, which doesn't leave a lot of material left for wear/deformation/sectional area. Any rotational slop and those holes are getting beat to shit with cyclic loading.
  • The pin is about the same size as the receiver pin, so that shouldn't be a problem.
  • I don't like the length of the parallel linkage versus the length of the pivot to shear pin. That's not a good torque ratio, which loads the shear pin at whatever that ratio is.
  • The load on the shear pin completely depends on what position it is in, as the hitch position changes the amount of torque about that pivot from tongue load vs pull load. Highest for pull weight when the hitch is at its highest/lowest points of adjustment. This goes back to damaging the shear pin holes, and not so much for failing the shear pin.
Could be perfectly fine, who knows. The 2.5" model is rated for 14kip, so should be fine. Hope they did a lot of FEA.

Interestingly, the Anderson Rapid Hitch is rated to 10kip, limited by ball capacity. That's a conspicuously omitted fact on Rhino's page.

I just don't see the need for this much complexity over something simple and adjustable like the Anderson or a Weigh Safe, etc.
 
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Squat has made its way up here...
 
I was not douche enough to wait and find out lol it was hilarious tho and guy was a flat bill with belt buckle dinner plate...? New bro trends I guess
 
Ron said:
Someone in the comments suggested the pin should be titanium so it wouldnt shear. Im sure it would play great with that aluminum body.
Click to expand...
Yes, making the pin out of a weaker material that is magnitudes more expensive seems like a great idea. Good job internet!

Grade 8 Alloy Steel:
Yield Strength: 130,000 psi
Ultimate Tensile Strength: 150,000psi
Shear Strength: 90,000psi

6AL-4V Titanium:
Yield Strength: 128,000psi
Ultimate Tensile Strength: 138,000psi
Shear Strength: 79,800psi
 
Fabrik8 said:
Uhhh.... Hmm. I don't comment on YouTube, but that thing has me scratching my head.

  • So all of the force (in any direction) is supported by at most two of those bolts in shear, and only if the load is distributed perfectly between them.
  • I hope there are sleeves on those bolts to act as pivots and set bolt tension, and to increase the bearing area on the aluminum pieces.
  • I hope the bolts don't have threads in the shear area.
  • I don't see any kind of sleeve on those shear pin holes, which doesn't make me feel good. I guess there's no room to sleeve them though.
  • Those shear pin holes are really closely spaced, and really close to the edge, both of which are not a good idea for high loads, but especially bad in soft materials.
  • I'm not as concerned about the pin shearing as I am about the holes for the pin. The holes are about 1.5 diameter apart, which doesn't leave a lot of material left for wear/deformation/sectional area. Any rotational slop and those holes are getting beat to shit with cyclic loading.
  • The pin is about the same size as the receiver pin, so that shouldn't be a problem.
  • I don't like the length of the parallel linkage versus the length of the pivot to shear pin. That's not a good torque ratio, which loads the shear pin at whatever that ratio is.
  • The load on the shear pin completely depends on what position it is in, as the hitch position changes the amount of torque about that pivot from tongue load vs pull load. Highest for pull weight when the hitch is at its highest/lowest points of adjustment. This goes back to damaging the shear pin holes, and not so much for failing the shear pin.
Could be perfectly fine, who knows. The 2.5" model is rated for 14kip, so should be fine. Hope they did a lot of FEA.

Interestingly, the Anderson Rapid Hitch is rated to 10kip, limited by ball capacity. That's a conspicuously omitted fact on Rhino's page.

I just don't see the need for this much complexity over something simple and adjustable like the Anderson or a Weigh Safe, etc.
Click to expand...

Good points. It just seems like at a minimum that it would wear out and get loose after minimal use due to the holes becoming egg shaped. Then most likely the row of small adjustment holes would become one long curved slot making the whole design useless because it would sit in the lowest position, LOL.
 
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