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how to mate a gear to a Rack-spur (Fixed :-) )
Posted: Thu Jul 24, 2008 4:00 pm
by NicoR44
Guys,
I want to mate this gear to the Rack-spur, I've looked in the help but I can't get it right.
can any of you give me a quick explanation of how it's done?
Thanks to any who can help me out here.
a sample file would be great too
See image below:
Posted: Thu Jul 24, 2008 5:10 pm
by Fernando Tella
The same number of teeth as has the wheel should fit in 2 * 3.141592 * wheel radius. Radius should be measure from center to half the height of the tooth.
Posted: Thu Jul 24, 2008 6:50 pm
by NicoR44
Thanks so much Fernando
Posted: Thu Jul 24, 2008 7:03 pm
by JDHill
Hi Curt,
I don't use SW much, but I think you would probably do that with two mates: a Coincident using two faces of the rack and the pinion, and a 'Rack Pinion' mate using one of the straight edges of the rack and the circular contour of the pinion. 'Rack Pinion' mate is in the 'Mechanical Mate' expander in the mates feature-editor:
I didn't take the time to make an assembly, but if you posted yours I could try it out...anyway, I hope it helps.
JD
Posted: Thu Jul 24, 2008 7:06 pm
by Fernando Tella
I hope it works; I'm not usually doing this. Just remembered the formula for the perimeter of a circunference: 2*PI*r
Edit: I see JD knows better what you are talking about. I know nothing about Solidworks.
Posted: Fri Jul 25, 2008 12:49 am
by mtripoli
What are you trying to do exactly? Are you making it so the gear moves down the rack? Or just mating the teeth? Or both?
Posted: Fri Jul 25, 2008 8:38 am
by NicoR44
Thanks guys, yes the gear needs to move down the rack, I'll post a sample file later today
Posted: Fri Jul 25, 2008 10:00 am
by NicoR44
Here it is friends! :
http://www.renderguy.com/maxwell/mate.zip
Thanks for any help!!!
Posted: Fri Jul 25, 2008 3:16 pm
by NicoR44
Thanks a lot Jeremy! for your help via E-mail
Posted: Fri Jul 25, 2008 3:41 pm
by JDHill
No problem, I hope it's helpful.
Posted: Fri Jul 25, 2008 4:48 pm
by NicoR44
Yes sir, it is