Anyone here seen something like this used before?

[Varjaks_coffee]

Hello all,

Curious if anyone here could point me towards some resources or perhaps know of an alternative name for this type of connection. I heard it referred to as an 'eccentric fixing', which seems appropriate, but I have not been able to find much after some searching. Apparently connections like it have been used when thermal expansion is an issue and you might otherwise have issues with hole alignment.

Any comments on the matter would be appreciated.

Thank you,

V_C

 

[Sparweb]

Yes,
-But-
It's more of a "shop fix" than any kind of officially sanctioned design feature.
Once you tighten down the bolt, it holds the internal disc to the underlying plate.
Careful fitting of an internal step (not visible) will also clamp down the external disk.
Sometimes this can be done with additional features to allow other joints to be adjusted as needed, simultaneously.

Don't assume the bolt achieves any sort of strength value in any direction doing this. It "just works".
If there's any safety application here, stay away, far away.

 

[LittleInch]

One photo and no drawings don't give us much to go on and I'm really struggling to see why it is used.

It looks like an eccentrically drilled washer and the marks in the bottom plate seem to show it has moved around the bolt hole.

Why not a normal washer?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[MintJulep]

Lots of things use an eccentric mechanism for alignment or adjustment.

Off hand

The lower end of MacPherson struts
Cam followers
Bearing housings
Chain and belt tensioners

 

[LittleInch]

Not clear from the photo though if the eccentric element sits IN or ON the larger disc.

The scrape markings on the larger disc seem to imply that the larger disc moves underneath the smaller one?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[BrianPetersen]

Toe and camber adjustments on automotive multi-link rear suspensions (e.g. VW Golf Mk5)

Chain slack adjustments on motorcycle rear suspensions having single-sided swing-arms (e.g. Ducati Panigale), and even on some two-sided designs (Kawasaki has done this a few times)

 

[dvd]

Fairly common method of eccentric mounting of v-groove wheels -

Your photo shows a lot of eccentric adjustment, which comes at the expense of mislocation - i.e. if "y" is adjusted with the eccentric, then "x" location has to change.

 

[chicopee]

It would be more useful if you took a picture of the entire top portion of the assembly on which the eccentric disk is seating on.