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crane arm for mechanical shovel

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  • crane arm for mechanical shovel

    hello, sorry if I disturb, I should make a crane arm to bolt to the bucket of a tracked mechanical shovel, the machine weighs 6 tons. how do I bolt it to the bucket, what material do I use for the boom, how long can I make it, how much could the machine lift?


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    https://www.tractorbynet.com/forums/...oom-works.html







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    Last edited by pietromarruggio; 01-20-2021, 12:09 PM.

  • #2
    It looks like you want to put it inside the bucket level with the floor? If so you can either weld two tabs inside towards rear of bucket and secure arm with a pin or make an upside down U that the arm fits in with a pin. The only problem with this is it may get beat up when using the bucket for scooping. For extra strength run a chain from top of bucket to top of arm farther out. As far as size and weight what do you want to lift and how much weight?
    MM250
    Trailblazer 250g
    22a feeder
    Lincoln ac/dc 225
    Victor O/A
    MM200 black face
    Whitney 30 ton hydraulic punch
    Lown 1/8x 36" power roller
    Arco roto-phase model M
    Vectrax 7x12 band saw
    Miller spectrum 875
    30a spoolgun w/wc-24
    Syncrowave 250
    RCCS-14

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    • #3
      I think the bucket is 1 cubic meter, I assume that 1 ton will lift it quietly, I just wanted to extend the boom as much as possible we wanted to use the mechanical shovel to build a shed and lift pillars and trusses safely without hiring a crane. thanks for the tips.

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      https://permies.com/t/126612/gin-pol...tractor-bucket
      https://www.everythingattachments.co...-1bp84ohhd.htm

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      • #4
        I think you have many good pictures to copy from. I like the second set of pictures you post for design. Boom in bucket and chains supporting on top. I think rectangle tubing the best for this application but pipe or i-beam will work also. Always be careful about being under any type of lift like this.
        MM250
        Trailblazer 250g
        22a feeder
        Lincoln ac/dc 225
        Victor O/A
        MM200 black face
        Whitney 30 ton hydraulic punch
        Lown 1/8x 36" power roller
        Arco roto-phase model M
        Vectrax 7x12 band saw
        Miller spectrum 875
        30a spoolgun w/wc-24
        Syncrowave 250
        RCCS-14

        Comment


        • #5
          Crawler mechanical shovel Fiat Allis Fl 4 l year 1987. weight about 52 quintals, approximate power 37 kw, or 50 hp, total length with bucket lowered to the ground about 4 meters, bucket width 1524, unloading height 2955, bucket about 0 , 55 cubic meters, fiat 4-stroke engine type 8035 aspirated diesel, direct injection, 2592 cc, 3 cylinders, steering with multiple dry disc clutches and band brakes, hydraulic gear pump driven by the crankshaft, bucket breakout force 3500 kg, tracks with 36 shoes on each side from 260 mm, track width 1100 mm, wheelbase 1598 mm, max forward speed about 8 km / h …… ..

          I don't know where to fix the gin pole support if above where the connecting rods articulate, or on the bottom of the bucket, I think I should reinforce the bucket with a steel plate to give more rigidity and prevent the bucket from crumpling under stress . Click image for larger version

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          the mechanical shovel raises half a cubic meter of earth about three meters, how should I size the arm, what material do I use and what section, tubular or profiled beam?

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          • #6
            Engineering is usually the expensive part.

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            • #7
              boom poles for bucket loader

              I could empirically realize with a 100 mm beam, but caution is never too much, the machine weighs 6 tons has a low center of gravity I think it is quite balanced and stable. the dump height of the bucket is about 3 meters high, I have to find the right place to weld the fixing bracket. a place that does not hinder the bucket opening and closing functions, a sufficiently sturdy place to prevent the arm and the support from unhinging during load lifting phase, I have to think about it. thanks anyway.


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              • #8
                I like the design of the red/gray farm tractor in post 3. The beam on the floor of the bucket. You could weld a plate to the bottom of the beam to bolt through the floor of bucket and weld eyes on the top of bucket to put chains through and attatch to the lifting end of beam. Think triangulation. At the beam end inside the bucket I would put a brace going up to the inside top of bucket to help support the tipping action. The cutting edge is a pivot point, the load end will want to go down and the end in the bucket will want to go up. Again the amount of weight lifted and the length of beam will determine the size of the beam. This must be built oversize as this will not be a static load. The forces of something hanging on there and driving the machine can easily triple the load weight if it is bouncing.
                Last edited by MMW; 01-24-2021, 06:39 AM.
                MM250
                Trailblazer 250g
                22a feeder
                Lincoln ac/dc 225
                Victor O/A
                MM200 black face
                Whitney 30 ton hydraulic punch
                Lown 1/8x 36" power roller
                Arco roto-phase model M
                Vectrax 7x12 band saw
                Miller spectrum 875
                30a spoolgun w/wc-24
                Syncrowave 250
                RCCS-14

                Comment


                • #9
                  thanks for your precious advice. I think about it a bit like boom I thought about a 100 mm H section steel beam, what do you think?

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                  • #10
                    Before ya get all worked up about beam size , boom length, structure and mechanical ability ..........ya best figure out your hydraulic system first....PSI Etc........and some form of counter-weight on the back of the tractor , otherwise this lifting device will be very limited in what it can lift.

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                    • #11
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                      it has a hydraulic ripper in the rear but I don't know how much it weighs as a ballast as a counterweight to balance the load and prevent the tractor from tipping over. the machine weighs about 5 tons, the beautiful is raised during the tipping unloading phase to about 3 meters high, the bucket has a capacity of half a cubic meter of material.

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