Hi Desertfox
I have attached a picture that shows the complete original design. The lever pivots around the indicated point in the sketches and in doing so alters the centres of the other 2 holes, this in turn tightens a brakeband. I am adapting this brake system to another machine that is...
Hi
In my sketches the left hand pictures show the mechanism in the "on" position and the right hand show the "off" position. the linkage goes past centre to lock into position so that any downward forces on the top lever will not straighten the linkage. This means that the linkage only moves the...
Unfortunately there isn't space for a 150mm stroke air cylinder hence the need to redesign the linkage. I have found this website http://www.excelcalcs.com/repository/machines/miscellaneous/scissor-lift-mechanism.xls/ that shows the linkage and mechanical advantage etc. Looking at the graph...
Hi Desertfox
Thanks for the reply. I am unsure of the actual force used which is why I asked for the systems to have the same maximum force. My thoughts on the original design
1 The air cylinder has a max stroke of 150mm but only 140mm is used
2 The air cylinder has a max force of 982 Newtons (5...
Hi All
I need to redesign a current lever operated system to knuckle joints to suit another machine with less available space. The current system uses a 50mm diameter, 150mm stroke air cylinder (5 Bar) acting on a 100mm long lever to rotate a shaft. on the other end of the shaft is a 75mm...
