Rather than two expanding /contracting pulleys, how about using the wheelhorse pto lever and gubbins, there's a good word, to push/pull the outer sheave of the pulley, and have a link to the idler/tensioner pulley to keep the belt tension right at both ratios.
Im only using one pulley, with the idler taking the slack. I would use the pto lever, but two three point levers have popped up there. So looking for a new home. Tempted to make it electric shift for the hell of it
Bolens did it with the Versa-matic drive which is on a Bolens ride-a-matic. First diff lock now Versa-matic, your WH's are getting more Bolens like by the day
I wasn't trying to claim it was new... My Lawnflite uses the same system to get 7 speeds... I was merely trying to squeeze another gadget - and gear lever onto Bendy.
I've a thing about knobs and levers, also looking forward to printing some 12 speed stickers...
Same principle as variomatic. Just two positions, low in the pulleys with no thrust on the end is low speed. High on the pulleys with them closed together is high speed.
Not or aware anyone has ever done it before, though the principle is well established. DAF did it in the 50s, the system is still in use.
Whilst you were all enjoying yourselves at rpt, I took some time away from diy and plumbing to have a go at something I've been thinking of for a few years.
wheel horses don't shift gear on the move well, and often you might need to slow down a bit for some power, or speed up.
so with the idea of Powershift on the old internationals I spent about 12 hours at the lathe and came up with this.
A split pulley system allowing a 20% increase in speed at the pull of a lever. So that's 12 forward speeds - and another gear lever to find a place for. Of course if the system works...
hopefully get get to have another look when I get home on Friday.
a of of it was spent in the landy or beer tent....
Gargrave show 2016
in Show Pic's and Reports
Posted
For a small show with the focus on horses and cattle we did good!
Thanks