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-   -   Retaining Rings Sticking Outisde of Frame (http://www.chiefdelphi.com/forums/showthread.php?t=155104)

NolanGZ3452 11-02-2017 13:18

Retaining Rings Sticking Outisde of Frame
 
My team had a question about the frame perimeter rules, we have a few roller shafts sticking outside our frame perimeter about a 10th of an inch with a retaining ring and was wondering if this is legal.

According to the rules:

R01. The ROBOT (excluding BUMPERS) must have a FRAME PERIMETER, contained within the
BUMPER ZONE, that is comprised of fixed, non-articulated structural elements of the ROBOT.
Minor protrusions no greater than ¼ in. (~6.3 mm) such as bolt heads, fastener ends, weld
beads, and rivets are not considered part of the FRAME PERIMETER.

TL;DR are retaining clips considered a fasteners?

Thanks!

Mechvet 11-02-2017 13:22

Re: Retaining Rings Sticking Outisde of Frame
 
The purpose of a retaining ring is to keep a shaft from leaving a designate location, therefore one could easily argue that it FASTENS the shaft in place.

engunneer 11-02-2017 15:58

Re: Retaining Rings Sticking Outisde of Frame
 
I would probably see it as a minor protrusion if I were inspecting you. Would probably need to see it in person to be more sure.

Robo Hamsters 11-02-2017 16:59

Re: Retaining Rings Sticking Outisde of Frame
 
Quote:

Originally Posted by Mechvet (Post 1643343)
The purpose of a retaining ring is to keep a shaft from leaving a designate location, therefore one could easily argue that it FASTENS the shaft in place.

Yes, a retaining ring is a fastener, but, they are placed in a groove on a shaft, or pressed onto a shaft. Either way the shaft extends past the fastener and as such would be beyond the frame perimeter itself. The portion beyond the fastener is still the shaft and not part of the fastener.

To be absolutely sure though, you should ask in the official q&a.

Al Skierkiewicz 11-02-2017 17:17

Re: Retaining Rings Sticking Outisde of Frame
 
Nolan,
An inspector would have to see to make a ruling but in my experience, a clip on a shaft is usually pushing against a bearing. Most such assemblies will end up being more than 0.10" beyond the frame. In any case, the end of the shaft is the protrusion.


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