Need ideas for a better design

jikelly · Jun 16, 2004

Last year I replaced the C4 tranny in my 73 stang with a Tremec. Some of you may have seen my write up on it on my uncompleted website http://webpages.acs.ttu.edu/jikelly/Tremec page.htm
Anyway I noticed a problem with my clutch pedal/Pushrod linkage.

The diagram below shows what the arm looks like and how it attaches to the pushrod. The hole in the metal tube is only in one side the other is closed so that the rod does not pass threw.

Well I guess friction is wearing a hole in the square tube where it meets the pushrod. I thought that this might be a problem eventually but I didn't know how else to connect the pushrod on the clutch lever arm.

A better design would incorporate some type of pivot ball that attaches to the pushrod and attachment arm. Below is a picture of what the improved design might look like.

Do you guys have any ideas on how to fix this problem?

68rustang · Jun 16, 2004

not sure if I fully understand your drawings, but why don't you just incorpoate a rod end on the end of the MC push rod?

jikelly · Jun 16, 2004

What is a rod end?

68rustang · Jun 16, 2004

this: (see attached picture)

they are available from many of the circle track vendors (afco, coleman, etc) and places like www.mcmaster.com

jikelly · Jun 16, 2004

Okay so these things are called heim joints. I need one with a threaded end on either side of the eye/ball joint. Hey thanks for your help I'm gonna surf the web and see what I can find.

68rustang · Jun 16, 2004

could you thread it directly onto the MC pushrod and then run a bolt through the bearing and your bracket?

Why was the horizontal "square tube with a hole in it" idea chosen in the first place?

68rustang · Jun 16, 2004

how about something like this using a simple clevis mount?

(see attached pic)

bnickel · Jun 16, 2004

check out www.grainger.com they have almost everything you could ever think of and there is one here in town

jikelly · Jun 17, 2004

68rustang said:
Why was the horizontal "square tube with a hole in it" idea chosen in the first place?

Well at the time it seemed like a good idea and I was too warn out and tired to really put anymore brain power to the problem. The clutch actuation system was the hardest part of the whole install. I'm just glad that it worked.

Thats a good idea about sticking it on the MC pushrod. I just wonder if the angles will be too extreme and cause binding. The Clevis pin is a good idea also but man there is a large amount of force on that part and eventually the pin would also fail. I mean the pedal effort is really pretty light but over time fiction does terrible things to metal parts.

WORTH · Jun 17, 2004

68 I like your first idea better, those joints work slick.

68rustang · Jun 17, 2004

If you put a bronze or other bushing in the pivot somewhere, then you wouldn't have to worry about friction so much.

The forces down there shouldn't be abnormaly large. another idea is use the bracket like I drew in the clevis mount, but use a heim joint in single shear (mounted to the side) and then you shouldn't have to worry about bushings.

The square tube idea you have going looks to be too large and cumbersome for such a simple motion.

68rustang · Jun 17, 2004

WORTH said:
68 I like your first idea better, those joints work slick.

so do i but the clevis was just another less expensive idea

jikelly · Jun 17, 2004

Great idea, thanks!

WORTH · Jun 18, 2004

68rustang said:
so do i but the clevis was just another less expensive idea

sounds like you like tinkering with ****, I'll see if I can post a picture of the inflight variable pitch propeller I built. THINK- High Tech Model "T"

WORTH · Jun 18, 2004

when we built it, it was cable operated but it was too hard to push when it started pushing air so we made it "air assist" with an air piston and an air valve. Works pissa now

68rustang · Jun 19, 2004

WORTH said:
sounds like you like tinkering with ****

Ha, yeah you could say that

That prop setup is pretty impressive. What sort of craft is that for?

WORTH · Jun 19, 2004

I have 2 of them on a 17 foot hovercraft.

68rustang · Jun 21, 2004

WORTH said:
I have 2 of them on a 17 foot hovercraft.

That's awesome. Have any pics of the entire thing?

Need ideas for a better design

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