Scissor Lift Design

According to the kind of questions it would be better if you ask some body else to do the design.

As a basic counsel do not use butter for the beams it is too weak.

I'll be more to the point than nick name. You do not appear to be qualified to design a device which could inflict lethal injuries on a person, if poorly designed.

Get a competent engineer to do the design. Then the insurance company can sue him if an injury occurs.

Come on guys it's a homework question. So, Ravi, sit down and make a list of the possible options you have eg

Butter - For - It's readily available in India, has a pleasing color Against - not many tables published on mechanical properties, may not withstand temp extremes etc

Then, think about each possibility yourself, construct your own reasons for and against using it, think about how you could verify your choices. Have your own design roughed out then look at how other people have solve the same problem.

It's the journey, not the destination that counts.

I'm with the others on this.

I have purchased several scissor lifts of various stroke/load combinations. There are several manufacturers that offer multiple combinations off the shelf. Your need will likely fit within standard products. Southworth is one company that offers a large array of lifts. Search "table scissor lift" instead of just "scissor lift" and you will get the stationary industrial lifts as opposed to the drive around lifts.

Because they are standard or semi-standard the safety interlocks, scissor sway, unequal load considerations are all worked out and proven. Since they are virtually off the shelf the cost is quite competitive.

to lift 1 meter and a table of these dimensions, I should not build a 1 scissor lift. Not even a scissor lift. And if it must be a scissor lift, I should build one with 2 or 4 scissors. Your biggest problem will be the lift off. When down, a scissor lift has a terrible starting couple. That is why sometimes a second piston is used to overcome this. I should use some steel for the scissors. You have no space for cylinders? Or motorized spindle screws?

thanks for reply, i have done all static force measurement.now i want to check it against

bending & buckling so i want exact material property by which i do all this thing.

& u are right that i have to go to build 2 scissor because large load & i have a enough space for cylinder.

Excuse me for anonymous reply: my email is still waiting for registration. What do you mean saying "Your biggest problem will be the lift off. When down, a scissor lift has a terrible starting couple." Is it a large force on a piston? This is more obvious to me due to small lever of this force in the lowermost position. Having a long lecturer experience I try to be correct in terminology and your's phrase is significant for my English. Did I understand you correctly? Ernik, St-Petersburg, Russia http://unimech.narod.ru

You are surely from India. Do care about the national pride and do not ask such disgraceful toooo simple basic questions. You will never get the answer, but the right responses as you have got here.

I am with nick as well as lyn. You are not design engineer. Do not think of designing anything. You will get what you want, in Indian market with ample choices. Just select appropriate and purchase one.