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car jack question
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Posted by: akueddy

03/01/2007, 13:59:06

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hello,

I am designing a tipping mechanism for a wheel barrow using a car jack.The maximum loading for the barrow is 100kg.I am thinking of installing an electric motor for the car jack(i am aware that electric car jack are offered on the market right now, but i have not found any analysis on it such as torque requirement,type of electric motor,gearing ratio).How do i calculate the torque required to move the jack?








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Re: car jack question
Re: car jack question -- akueddy Post Reply Top of thread Forum
Posted by: djinn

03/02/2007, 06:39:14

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It will depend on how you are driving the jack, whether it's with a cam or a crank. You need to look at the work required to lift the jack.
ie E=F.d and E=T.θ
If you measure the number of pumps to fully lift the jack, you can find the amount of work required per pump.
And remember that the pump will not be 100% efficient.







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Re: Re: car jack question
Re: Re: car jack question -- djinn Post Reply Top of thread Forum
Posted by: djinn

03/02/2007, 06:42:44

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Sorry, I assumed it was a hydraulic jack. If it's a screw scissor jack, then you could measure it with a torque wrench, or check this out /torque.htm and then do some simple geometry on the rest.







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