Quote:
|
Originally Posted by Travis Covington
The benefits of the dogs are seen in a lot of real world applications
|
A few weeks ago in the machine shop we had the verticle bandsaw gearbox apart due to a broken roll pin and I was surprised to find that it uses dog style gears and shifter just like in your gearbox and the Technokats' gearbox, with the same three triangle-ish shape.
One way to look at this (that may sound really strange) is that a Technokat style shifter can be viewed as a really large pitch gear with three teeth. Cmparatively, the gears in a FIRST sliding gear shifting transmission are a far finer pitch that the dog, because they have more teeth for about the same diameter. And everyone knows it is easier to strip a finer pitch gear than a heavier pitch gear. Tada, explained. That was kind of whacko sounding, after all I made it up, but it is one way to look at it.
The first shifting robot transmission I ever saw was that of Team 60 in 2002. It shifted by sliding gears into one another. While it worked exceptionally well, I do have to say that looking at it closely in the pits, I found a lot of metal shavings in the bottom of it. But, Team 60 has been shifting for a while now and they are still sliding gears so it must be working, at least in the limited use as Travis pointed out.
But to look at it, the dog just seems more beefy and robust to me and that's why it gets my vote.