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Anonymous Poster

Knuckle Joints

03/04/2010 8:35 AM

What is knuckle joint? What is its design procedure? Where can i get to see its images? How to know that when the particular joint will fail in shear, crushing,tension etc? plz take ex. of knuckle joint and explain

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#1

Re: knuckle joints

03/04/2010 9:30 AM

Not too sure what you really are looking for. I'll try this one first.

Knuckle Coupler, maybe? As in Railroad Car connector? Here is one type:

If this is not right, let us know a little more. Maybe we can help.

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#2
In reply to #1

Re: knuckle joints

03/04/2010 10:48 AM

Them there new-fangled things are known as "buckeye couplers" in the UK.

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#3
In reply to #1

Re: knuckle joints

03/04/2010 11:04 AM

That is the home work given to him

Mind look at the language

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#4
In reply to #3

Re: knuckle joints

03/04/2010 11:11 AM

I think you are correct. Then, let's make him work a little for some information.

Does anyone here suspect that information about a Knuckle Coupler is what he is after?

Come on back Guest OP. We may try to help you a little, but you must be more clear with your request.

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#5
In reply to #4

Re: knuckle joints

03/04/2010 2:04 PM

My first impression was "rod end"????

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#6

Re: Knuckle Joints

03/05/2010 12:39 AM

I too think it sounds like homework, but the failure modes make me think of the kind of universal joints commonly used in drive shafts and tractor Power Take Offs.

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#8
In reply to #6

Re: Knuckle Joints

03/06/2010 9:36 AM

From Wikipedia, the free encyclopedia

In an automobile, ball joints are spherical bearings that connect the control arms to the steering knuckles. More specifically, a ball joint is a steel bearing stud and socket enclosed in a steel casing. The bearing stud is tapered and threaded. It fits into a tapered hole in the steering knuckle. A protective encasing prevents dirt from getting into the joint assembly. Motion control ball joints tend to be retained with an internal spring, which helps to prevent vibration problems in the linkage. Commonly found in automotive throttle linkages, throttle body set ups, these are also widely used on construction equipment, the end of gas springs and also in children's toys.

Ball joints are the pivot between the wheels and the suspension of an automobile. Ball joints play a critical role in the safe operation of an automobile's steering and suspension. Ball joints can also be found in most linkage systems for motion control applications, and should not be confused with spherical rod end bearings, which are a different design.

Regards, Tim

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#9
In reply to #8

Re: Knuckle Joints

03/06/2010 10:50 AM

Your link to steering knuckles didn't work.The only reasonable photo I could find quickly of what I had in mind is this:

which is of course only the inner part of the joint.

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#10
In reply to #9

Re: Knuckle Joints

03/06/2010 11:35 AM

How about the animation here: http://en.wikipedia.org/wiki/Universal_joint (where the part you show is the transparent green one)?

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#11
In reply to #10

Re: Knuckle Joints

03/06/2010 11:43 AM

I didn't know how to copy the animation. The one I used was a partial screen capture.

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#12
In reply to #11

Re: Knuckle Joints

03/06/2010 4:11 PM

Good point. I have no idea of how to capture it either - that's why I just posted the link. The article listed several common names for that type of joint, but I didn't find a similar one for the "knuckle joint" that the OP was looking for. I haven't seen a response to my suggestion that (s)he provide some background...

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#13
In reply to #10

Re: Knuckle Joints

03/06/2010 6:18 PM

Hello Ron,

Not bad for a Petrohead

Best Regards,

Tim

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#14
In reply to #13

Re: Knuckle Joints

03/06/2010 6:28 PM

Are you seeing this as an animation? I'm getting a single still, and with the transparency of the parts, I'd have had a rough time understanding what was happening before I learned about U-joints (which would have been in 1957, when my dad negotiated the price of a 1949 Ford sharply downward at a used car place so that my brother could buy it. It had been taken out for a test drive, and the driveshaft dropped out onto the road a block away. The three of us did the repair right there and he drove it home. That was the weak link in that drivetrain - acted as a fuse for the none-too-robust transmission!)

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#7

Re: Knuckle Joints

03/05/2010 8:21 AM

Guest - you may also want to provide a bit of background information; "knuckle joint" may have half-a-dozen different meanings or interpretations depending upon where you are (which country), and in which field of engineering (railroad, automotive, automation/robotics, mining... . Someone who can match locale and field is far more likely to come up with the right guess interpretation.

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#15

Re: Knuckle Joints

03/06/2010 6:47 PM

Hello Guest,

Here is a virtual link for you to help understand how a universal knuckle joint works.

Best Regards,

Tim

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#16
In reply to #15

Re: Knuckle Joints

03/06/2010 7:49 PM

You did it!

Now please tell us how...

Dick

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#17

Re: Knuckle Joints

03/07/2010 10:05 AM

To dkwarner,

Very simple,

I went to your link in a new window using internet explorer, link

http://en.wikipedia.org/wiki/Universal_joint

Click once on the picture to expand the picture. This changes the web address at the top to ;

http://en.wikipedia.org/wiki/File:Universal_joint.gif

Highlight the webb address and right click your mouse and select (copy).

Open up a Reply message window in CR4. Click on the Camera Icon, and window will open. Right click your mouse and paste in top slot called (Image URL) and pste the link then click on submit. A small box with a red X will apear on the page.

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#18
In reply to #17

Re: Knuckle Joints

03/07/2010 12:21 PM

Got it! Thanks!

Actually, I don't use a mouse at all (I've gotten so used to the trackpad that I find using a mouse hard on my wrist), but of course I do have an equivalent to right-click)

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