Make a homemade crane

Any of the users forumhouse.ru I agree with the statement that one of the most useful tools in the construction - is a crane. Steel warrior becomes an indispensable tool when the need to raise a large load occurs.

Crane is usually associated with the huge building in the tens of meters high. However, in the private house-building often require a compact version with a boom length of no more than 5-7 meters.

How to proceed? Rent a crane - fun is not cheap, especially if the building does not stretch to a month.

In this case, one option remains - roll up your sleeves and build a mini-crane independently. And to help you in this, our forum users!

Mini pioneer for construction

Savings on their own health and attempt to manually lift the load too heavy, especially if the construction of the house is carried out independently and without the involvement of hired labor, do not lead to anything good. We have already told our readers how to build self-vibration table and vibration plate. It was the turn of the crane called "mini-pioneer."

Crane "Pioneer" is a collapsible mobile structure via which the lift load to a predetermined height. Such a valve can be used for digging foundations and construction works for the construction of houses.

The basis crane - bearing chassis frame, installed permanently or on a mobile chassis. On the frame is mounted the rotating part of the crane. the boom may be rotated manually or electrically. The very construction of the crane is carried out in a modular and can be dismantled into several parts for easy transfer mechanism from one construction site to another.

Structural stability is provided by the counterweight and the steel rope sling (turnbuckles) and lifting cargo by means of winches and block.

Volandemor (user FORUMHOUSE):

- I'm almost single-handedly build a house from the six-meter timber. Lift and drag it to one is impossible. That's why I decided to put the crane in order to take a timber from a stack, putting in place cutting and lifting on a plinth.

As you increase the height of our buildings forumchanin plans to put the crane on the joists of the house.

Forumchanin crane frame assembled from corner 63h63h5 mm. Arrow 5 meters long - from a tube with a diameter of 50 mm. two angles 30h30h3 mm were used for structural reinforcement. Also in the plans Volandemora It includes the further extension of the boom even 2 meters.

Volandemor (user FORUMHOUSE):

- Payload crane is about 150 kg, but the structure can lift greater weight, but in order to achieve this, it is necessary to increase the multiplicity of the pulley.

In Greek Polyspaston means "pull-several ropes."Pulley block refers to a device for lifting the cargo. It consists of several parts, connected by a rope or cable, which encircles blocks circumferentially. Burton allows lifting loads with less effort than the weight of the load.

Although the easiest pulley block provides a three-fourfold gain in strength, we should not forget that in this system are inevitable friction losses. Even in the best models they block up to 10%. And the more you win in force, the more reduced the distance by which the crane can move the cargo.

Volandemor (user FORUMHOUSE):

- In the manufacture of assemblies and mechanisms it took me a week. Two more days I spent on the assembly and fine-tuning mechanism. Slewing drive and drive boom lift - a six-time manual chain hoist. Lifting drive - is also a two-time manual chain hoist.

Volandemor notes that it would be much udobneeupravlyat crane with electric drive, for example, to carry cargo lift with remote on a long cord, as is done in industrial models. But in this case significantly increases the complexity of manufacturing all mechanisms that lead to more expensive designs and increased time for manufacturing of the crane.

Interesting Details crane manufacturing.

Volandemor (user FORUMHOUSE):

- As the turntable I took two faceplates, which are found in the workplace. In principle, I have collected from the crane that was at hand. Instead welded bolt axis 30 mm. I did not take a bolt of high-strength steel, t. To. Are welded worse, do not stretch and do not bend, and immediately burst when exceeding the limit of their strength.

All components are lubricated lithologic crane.

To reduce the weight of the counterweight, the length of the support legs is 2 meters. When calculating and independent manufacturing such tap assemblies should consider one point. The fact that the turning radius of faceplate 200 mm and a distance of 2 meters to the counterweight mass 100 kg, acts on the central bolt tensile load of 1 ton. And this is without taking into account the weight of the boom and the lifted load!

It is also important to check the stability of the crane.

Volandemor (user FORUMHOUSE):

- First, imagine that our crane - it is a single beam that rests on one leg, with this support must be the smallest distance from the axis of rotation. On the beam, there are three forces: the weight of the load, weight and counterweight of the crane weight. So as not to take into account the weight of the boom, I underestimated the weight of the crane by 50 kg. Calculation of the approximate and simple, but it's better with him than without him altogether.

Boom drum lifting mechanism Volandemor I made from a tube of 100 mm diameter.

Volandemor (user FORUMHOUSE):

–Here estnyuans - drum should not be placed close to the eyelets. It must be slightly axially displace towards the first block to the second layer of cable is wound evenly.

Validating Blocks made of three goals: two large and one small. All blocks are without bearings. It is important to ensure that the blocks are well-envelope rope. T. e. or rope should be flexible, or eyelets must be of large diameter. Otherwise, when the boom raised without load cables may fly out of the blocks.

Volandemor (user FORUMHOUSE):

- Kanat me a diameter of 12 mm, but it is very thick - just another did not. If the boom will lengthen, I put more flexible wire with a diameter of 5 mm, since his work load is 150 kg, and the fracture - 850 kg.

When designing modular systems it is important to understand how it works and pays tackle. Let's consider the example of a mini-pioneer.

Volandemor (user FORUMHOUSE):

- The principle of operation is similar to the gear chain hoist operation - win in force, but lose in the rope length and, consequently, the load lifting speed.

The main characteristic of the gearbox - a gear ratio, and tackles - multiplicity, ie the attitude of all the branches of the cable to run from the drum. If we have 6 rope lengths, then a six-tackle.

This means that pulling the load on the drum is 6 times less than the weight of the load, and the rope itself, if it is designed for 100 kg, then collapsed to 6 times, lift 600 kg.

It should be noted that the construction of the crane came to be so successful that many of our customers have decided to repeat it and even give Mobile cranes, putting it on the "Gazelle".

For example, the nickname forumchanin plumag offers assistance with such a crane equipped with a heavy-duty and electric drives, put the concrete pillars. And in order to be able to transport a crane on public roads, make the collapsible design and fully assemble the crane in a body already in place the proposed work. This will allow to quickly recoup all the costs associated with the crane manufacturer.

Learn all about the self-construction of cranes, as well as get acquainted with the drawings mini pioneer, you can in this topic our forum. All you need to know to make a mini-crane from scrap discussed here. From the concrete mixer to the tube bender. Members of the forum topics about the production of useful DIY are in this section forum.

What tools are needed to build a carpentry shop, tells in this video. And this video look at how to make their own tools, which will simplify the work on your site.

Discuss the article and read other materials devoted to country life you can on the websiteFORUMHOUSE.

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