|Project by kiefer||posted 03-09-2014 09:29 PM||6206 views||37 times favorited||18 comments|
Here are a couple of sketches I drew up to show the internal locking mechanism of the Kiefer Leg Vise
I hope you can understand the concept from this a little better and it is the best drawing I can come up with but I wish someone could do this in SKETCHUP .
Here is a little explanation of the locking action.
When the pedal is starting to get pressed downward the lift rod gets pulled forward by the chop to which it is attached to and rides upward on the ramps and onto the top of the ball bearings which are bolted to the lower beam . This action lifts the wooden lock rod upward and the half nuts which are attached to the lock rod engage into the threaded rods and lock up the vise .
The chop is free to travel to the required pressure and the lift rod just follows along unrestricted
The pedal arm is fitted with a cylindrical steel end and engages in between a row of cylindrical steel rolls giving a sort of ratchet action
Upon releasing the foot pedal the spring on the upper beam pushes the chop open and also pushes the lift rod backwards letting the lock rod disengage and let the beams move freely .
NOTE: There is a spring not shown in the sketch .The spring is located at the top of the lock rod and provides downward pressure when the pedal is released .
The locking mechanism is covered by a removable cover to have easy access to the mechanism .
A very simple mechanism that looks somewhat complicated at first because the complete vise is in this sketch .
I hope this is a sufficient explanation but if there are questions please ask .
Also watch the video in my previous post.