Engineer Rashid Ali: February 2016

This is how I made this Project

About 10 years ago when I was in 6th class, I first time saw an Excavator Crane near my home. I observed that carefully, came to my home and constructed such a mini Crane using wood, plastic & string.

Now after 3rd semester break vacations. I was sitting at the top of roof at home. Suddenly an idea came in my mind, why should not made it again. Then I repeat same method and principle (as used 10 years ago) of working with some improvements and advancements. Complete procedure is given as follows...

Construction:

I took three rectangular wooden strips one small and two large (same in length), having suitable length, width & thickness.

One Square and one rectangular wooden plates.

One iron metal sheet and cut bend to make bucket having teeth and fixed it in small wooden strip as shown in picture.

Now joined this bucket with one long wooden strip with moveable joint.

This is further joined with other wooden strip.

An elastic rubber is used at both moveable joints to pull it back.

At 2nd joint rubber is adjusted in a different way, making a triangle, because greater moment arm requires less force to produce turning effect. It is quite easy to pull it back (As shown in picture).

Metallic wire is used to apply effort to move bucket and crane arm. below one is used to move bucket and upper one is used to move crane arm. (shown below in video)

A bike brake handle (cut in a suitable way) is used to control metallic wire.

Now this part is connected with square wooden plate with the help of a moveable buckle of a belt.

Rectangular wooden is base on which whole crane moves horizontally freely . This plate is joined with this part with the help of a nail adjusted so that it can move freely along 360 degree.
Also connect a long iron strip to control Boom And stick a coloured tape to get it colorful.

It has completed now.

Working:

When handle is moved effort is applied here which is transmitted through metallic wire and moves the bucket downward.
Elastic rubber pulls it upward.
Moveable buckle (at base) is used to move the crane arm vertically up and down.
Square Wooden plate is used to move horizontally. In this way crane moves in 3-D.
watch the working when upper wire is clipped (closed).

watch the working when upper wire is opened.

Watch complete working here.

While lifting soil.

Thanks for watching my project, must give your views & comments & suggestions.

A good Engineer is one who Constructs such a device which is simple, beneficial and most of all cheap. I spent only Rs.30 on this project.

Thanks to my family who encourage, support & helped me to make this project.

Also Thanks all friends who appreciated me.

Engineer Rashid Ali

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Monday, February 8, 2016