Electronics > Mechanical & Automation Engineering

Home Made DIY Engine Crane Lifting Hoist (0.5 - 1 ton)

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Mechatrommer:
so i just like to echo the unlinked website here... in case members or someone out there searching for it...
http://www.soasystem.com/eng/enginelift





more detailed info and dimesions are in the website, Cheers.

Doctorandus_P:
I like the simplicity of this design, but I do have a bit of doubt on the loops with which the hooks of the hoist is connected.

It looks like those bent loops are just welded around their end.
If those loops are rotated 90 degrees and their ends made a bit wider and longer, then you can weld them to the side of the tubes, which makes it a lot easier to make strong welds. This is "normal practice" in industry, but especially important for people who do not have much welding experience.

If I were to make it myself, I would also put some extra thought into being able to take it apart by removing a few bolts, because it would be stored most of the time and only used occasionally.

Kleinstein:
The rollers beneth the hoist also don't look very sturdy. Once the rollers collapes the dynamic force can bring down the rest even at a moderate load.
The lever ratio looks like 1 :2.5 or so.
In the current state I would not use it for more than some 100 kg.

PlainName:
Isn't there quite a lot of leverage in the vertical member which might twist the horizontal bar (or even break the welds)? Perhaps some bracing arms on the side opposite the car would fix that.

MarkF:

--- Quote from: dunkemhigh on November 03, 2021, 08:43:18 pm ---Isn't there quite a lot of leverage in the vertical member which might twist the horizontal bar (or even break the welds)? Perhaps some bracing arms on the side opposite the car would fix that.

--- End quote ---

I echo your concern.
Wouldn't a solid horizontal bar on the top be better?

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