Gear Ratio Corkscrew Help
HI, I'm a new member and a student doing Design Engineering at uni. Im in the middle of creating a corkscrew requiring less force to be used. And also the screw translates vertically, but it is the bottle that rotates not the screw.
The bottle is secured and roatated by a ratchet gear. Meaning it only rotates as the screw is coming down and not going up. The problem I'm having, being a design engineer, is making the maths work for the prototype. I know that one roation of the bottle has to equal the vertical translation of one turn on the screw; and the torque required to free a cork from a bottle is 1.64nm or 14.5 inch pounds. The length of one roatation on the corkscrew is 3mm.
The layout of the screw is a crank, which is turned by the user, which in turn rotates the gear under the bottle, then two more gears as a train (allowing for speed changes) before a pinion gear provides the vertical movement of the corkscrew.
Any help would me greatly appreciated as I've been struggling with this for weeks.
I'm not necessarily asking for the answers... could someone please just show me how to split it up and what equations i need to be looking at as I'm lost!
Many thanks in advance,
Allan