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Designing a Floating Bracket

02/09/2011 8:19 PM

I'm looking for a half way decent way to build a bracket and let the device on said bracket "float" without destroying the mounting tabs on device.

Reason for this: This device is actually a zero speed switch. It'll be interlocked with a starter. The shaft I will be attaching this device to will move in and out of the bearing(not supossed to but bobs your uncle). It moves due to crappy maintainence by millwrights. And since the shaft hasn't stopped turning management doesn't see the problem.

The problem is that when the shaft, which is an auger gets full of product the shaft jumps forward and slings the belt off the drive and cloggs the auger. So I would like some ideas for a floating bracket. Thanks.

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#1

Re: Designing a Floating Bracket

02/10/2011 1:05 AM

Try an "L" shape with slotted holes in axis of potential movement. Overtravel can then be "absorbed" by the bracket slipping along the slots. Would require reset after each fail event. The slots could even be "open" ended to allow the bracket to completely slip off if that was of benefit.

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#2

Re: Designing a Floating Bracket

02/10/2011 3:35 AM

Rubber anti vibration mounts are cheap and plentiful in a variety of sizes and formats.
You must have seen the sort of thing, cylinder of rubber the diameter of a susage, about the same length as diameter with a steel plate and stud bonded to each end.
Maybe use them as well as or instead of the slots in the previous reply.
Del

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#3

Re: Designing a Floating Bracket

02/10/2011 5:39 AM

yeah thatll work. what would yall think of a rubber hose used as a coupling that is a tad long and split down the middle to allow for the movement.that way the device may not have to float?

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#4
In reply to #3

Re: Designing a Floating Bracket

02/10/2011 5:49 AM

I'm all for that sort of experimentation.
Sounds good to me, rubber hose has a multiplicity of uses.
Del

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#5
In reply to #3

Re: Designing a Floating Bracket

02/10/2011 5:55 AM

I've got a bucket of hose clippings in the shed. They won't be the size you are after but what fits that fits and Bob is part of the extended family. If only for a while. You could even do the macaroni in the macaroni trick. Works as engine mounts, for a while, Ky.

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#6

Re: Designing a Floating Bracket

02/10/2011 11:00 PM

Google www.go4b.com and search for whirlygig it is made to do the job

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#7

Re: Designing a Floating Bracket

02/10/2011 11:40 PM

Before I could post any solution to this, I need to see a picture of what it is in it's present state. The description itself sends me running for the hills. I live in the hills so it's a walk for me. I need a visual to make any type of solution for this one. It's not like a chain that may need an idler. We are twisting and banging, once again.

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#8

Re: Designing a Floating Bracket

02/11/2011 12:52 AM

you could also use a photo eye to turn off the auger or what ever feeds auger to prevent the overload condition

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#9

Re: Designing a Floating Bracket

02/11/2011 5:14 AM

try this:

Dear CR4.

How can I stop my auger getting full of product?

Jim

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#10

Re: Designing a Floating Bracket

02/11/2011 6:53 AM

Here we go again. Solving a problem that needs to be repaired not masked by some other fix. The issue is to fix it correctly or else. Else is having an augur that is tearing itself up by shifting inside of the housing, inside the bearings tearing away at shaft materials etc. Come -on! Do it right!

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#12
In reply to #10

Re: Designing a Floating Bracket

02/11/2011 9:01 AM

As a BSEE with loads of experience designing multi-technology systems, I was fascinated to read this thread. I'm sure tht MattJohnson is grateful for all the excellent ideas. I understand Matt's frustration at management being unwilling to "do it right" as Fixitorelse suggests. I'm sure we've all seen this situation before. However, as a professional, I realize that my job is twofold, first my job is to tell my manager my opinion, and all the reasons and proofs of it, but then my job is to do what they tell me to do, regardless of how foolish and shortsighted it is. So in this case, until management changes its mind, MattJohnson is "doing it right". Good luck Matt.

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#13
In reply to #12

Re: Designing a Floating Bracket

02/11/2011 9:17 AM

...unless of course safety is being compromised.

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#14
In reply to #13

Re: Designing a Floating Bracket

02/11/2011 10:22 AM

Very true Guest, and of course as long as it's ethical and legal.

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#15
In reply to #12

Re: Designing a Floating Bracket

02/12/2011 9:17 PM

bluezone is correct i do welcome all the comments thats why i post. thanks to all

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#16
In reply to #12

Re: Designing a Floating Bracket

02/12/2011 9:38 PM

I realize that my job is twofold, first my job is to tell my manager my opinion, and all the reasons and proofs of it, but then my job is to do what they tell me to do, regardless of how foolish and shortsighted it is.

I thought I was the only one that had management like this. I feel a little better that I am not alone with management that just does not see how things work in the right manner as they should. Although I will not compromise safe wiring practices and I do not care what they say. I will do it to code and that is it. I may agree with them on their solutions or ways they want it done, in the end, I do it according to code and it is the only way it will be done, even though they have no idea. I will not compromise safety in any way.

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#11

Re: Designing a Floating Bracket

02/11/2011 7:08 AM

Shaft collar on shaft to retain it from shifting in bearing.

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#17
In reply to #11

Re: Designing a Floating Bracket

02/16/2011 1:02 PM

As ozzb said, shaft collar on shaft to prevent shifting... but add a UHMW washer (thrust bearing) between the two to prevent metal on metal.

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Anonymous Poster (2); bluezone (2); cnc jim (1); fixitorelse (1); Garthh (1); Jimh77 (2); Just an Engineer (1); ky (1); MattJohnson (2); Out of Box Experience (1); ozzb (1); user-deleted-1105 (2)

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