ROBAPERAS Fruit-picker





Introduction: ROBAPERAS Fruit-picker

About: Metal worker. Lathes, milling machines, flat and cylindrical grinding machines ..... Twitter / instagram @igggv

Do you have fruit trees? . Better not to climb a ladder to catch the fruit , the ladders are dangerous.

The fact is that there are already many designs, but this fruit picker allows you to pick the fruit in the same way as the fruit you pick with your hand.

That is, open the hand, close it on the fruit, pull the fruit while you turn the wrist.

And this is the key, the spin.

Pulling back the handle the claws open, and releasing the handle the spring causes the claws to close. And if you turn the handle, the claws turn. video

Add that, it is very simple to make, few materials, very common tools, and a 3D printer.

Step 1: List of Materials and Tools

For assembly you will need:

3DPRINTED parts , designed for printing without supporting material

MATERIALS, easy to find in any hardware store:

1 tube diameter 20mm thickness 1.2mm or 1.5mm and length 2 meters

2 threaded rods M8x1 meter

1 threaded rod M8x200mm

8 screws M6x25mm

2 screws wood thread length 20mm

8 nuts M6

11 nuts M8

2 nuts M8 and 40mm length

1 M8 flat washer

2 flat washer M10

1 spring thickness 1.5 length 40mm


2 hexagonal wrench 13

1 hexagonal wrench 11

1 hexagonal wrench 10

1 star screwdriver

1 meter

Step 2: Assembly

Put 2 M8 nuts on the end of the threaded rod M8x200mm and press against each other.

Inserts the threaded rod through the 3Dprinted part # 2.

Place 4 nuts M6 in the hexagonal holes.

Screw another M8 nut through the other end of the threaded rod.

Do not tighten too much, the pieces of plastic could brake.

Place de spring.

Step 3: Assembly

Place 4 nuts M6 in the hexagonal holes. 3Dprinted part # 1.

Place 3Dprinted part # 3, insert a M6 screw through the hole and screw it into the nut.

Do not tighten too much, piece # 3 has to be able to rotate.

Repeat with the other 3Dprinted parts # 3.

(I have used longer screws, and have cut them, to make the turn on a non-threaded surface, but it is not necessary).

Step 4: Assembly

Join the assembly of step 2 to the assembly of step 3.

Place 4 M6 screws through the 3Dprinted parts # 3 slot and thread into the nuts.

(Do not tighten the screws too much, you could block the assembly).

Place 2 flat washers M10 facing the rounded part.

This, allow the rotation between the 3Dprinted part # 1 and the tube.

Step 5: Assembly

Thread 1 M8 nut at the other end of the threaded rod M8x200mm leaving about 20mm of thread to thread 1 M8 nut 40mm long. Tighten one nut against the other.

In my case the long nuts have a smaller hexagonal, but could serve any hexagonal that enters by the inside of the tube of diameter 20mm.

Thread 1 nut M8 on a threaded rod M8x1meter, thread connecting it to the assembly.

Tighten the nut against the nut M8x40mm.

In this way the threaded rod of 1 meter is attached to the 200mm threaded rod.

Step 6: Assembly

Repeat the union with the other 1 meter threaded rod.

Insert the tube.

You can make the fruit picker, longer, using a tube of 3 meters and adding another threaded rod M8x1 meter.

Step 7: Assembly

Thread 2 nuts M8 approximately 95mm from the end of the threaded rod and tighten against each other.

Insert the handle through the threaded rod.

Make sure that the nut fit into the hexagonal hole.

Place a flat washer M8, and thread two nuts M8. Tighten against each other.

Step 8: Assembly

Finally insert the cap and secure it to the handle with two M3 wood screws.

Step 9: Wait

Now, wait for the fruit to mature.



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    25 Discussions

    This is a super neat instructable! I plan on modding something like this to function as a claw with two pincers and I plan on keeping the length way shorter since it'll be housed in a compact place. What length bar would you recommend and what kind of handle do you think I should use?

    1 reply

    Thanks for your comment. I think you can do it as short as you need. It all depends on how much you want the claws to move from the closed position to the open position. And how far you can give the piece that contracts the spring. The greater the difference between the distances of the screws of part 1 and part 2, the less distance traveled between the two parts to open the claws the same.Trigonometry calculations.

    "you do not always place the hand in the same position"

    I wonder if you could create a 'grip" that incorporated a 'sliding handle.' With two slits cut down each side (a portion of the handle length and centered along the length) creating two sections that would have a large O.D. in the center of these 'strips' such that gripping them would secure the sliding grip to the pole at whichever position the user chose. If the inside surface of the 'strips' were 'rippled' at a right angle to the pole, it might enhance the gripping power against a smooth pole.

    1 reply

    Thanks for the comment. There are several that have commented that this detail is missing from my design. I'll have to think of something.

    votre partie téléchargeable ne fonctionne pas correctement, seul un élément se télécharge (mâchoires cueille fruits) donc impossible de faire toutes les pièces en 3d

    Pas vraiement cool pour un projet payant

    2 replies

    Gilles, je pense que je l'ai vu ce qui peut être le problème. le fichier est trop volumineux pour télécharger, et pour cette raison je devais compresser avec zip. de sorte que le fichier téléchargé n'a pas vraiment comme stl. décompresse le fichier et voir le fichier stl. si cela est le problème se pose ou vous d'autres questions ne hésitez pas à me contacter.

    Le fichier ( 1 .stl file ) contient toutes les pièces. Sélectionner les pièces une à la fois, pour une meilleure impression. Une doivent imprimer 4 fois. J'utilise slic3r. Placez le fichier stl et sélectionné le morceau que je veux imprimer. Et slic3r génère gcode de ce morceau.
    Si vous avez des questions ou des problèmes, s'il vous plaît ne pas hésiter à demander.

    That's neat! I wish I had one of these when we had a pear tree :)

    4 replies

    If you wait until they fall, they are rotten inside. You must pick pears while green to keep them longer.

    If we waited that long the birds would always come to eat them. ^.^;

    thanks. also wish I had trees. I made it for my uncle.

    A nice design on the mechanism. A second hand grip would be nice to see. It looks a bit unweildy

    2 replies

    Thanks, and yes. That was my first idea, and in fact, the first version I made, with aluminum and wood pieces, had a handle on the tube. The problem is that when you use it, you do not always place the hand in the same position. When you are picking a fruit that is on the top of the tree, it is different than when you are putting the fruit on the ground.
    But I understand what you say. I think the best solution would be to line the tube with tape like the one used with the tennis racket handles.

    I see the problem, maybe something that slide's freely and then holds with a firm grip from the hand. Probably over complicating the build though.

    I cannot figure out how this tool work... I mean... i do know, but I don't see how you open the claws to get the fruit... with the spring it is always close... but how do you open it to catch the fruit?