Introduction: Hydraulic Arm
Finalist in the
Hands-on Learning Contest
Step 1: Materials
- Pieces of cardboard
- 8 syringes
- 1,5 meter hose (aquarium pump)
- 15 Plastic clamps
- 2 screws with 3 washers and 4 nuts
- 1 piece of wire (clothespin)
- 1 wooden stick
- Water, paint, glue, knife, ruler, etc..
Step 2: Planning and Cutting
We made two drawings of what would be the arm and joints. This allowed us to readily quantify the material being used.
After choosing the model that we would use, cut the pieces (not much criterion measurements) as shown in picture.
Step 3: Cutting and Mounting Arm
Step 4: Cutting and Mounting Claw
The gripper is designed to move just one piece. It was more simple.
The "finger" was pasted fixed and mobile was seated on a shaft made with a piece of wooden stick that had a piece of cardboard cut in a circle glued on top so as not to leave the place.
Step 5: Cutting and Mounting Base
The base was made from two pieces of cardboard in order to support arm and accommodate syringes in the same set.
The movable part has two holes:
- One in the center (to be able to rotate the base)
- The other end (to link the syringe and allow movement)
The syringe was attached to another piece of cardboard to keep the same level of mobile base.
After verifying the limits of movement, we fix the syringe with the clamps.
Step 6: Putting It All Together
Aftercreatedthearm,clawand basepiecestogetherto testoutthe movements andcheck if everything isworking properly.Onceassembled, we found thatthe syringeclampwas notwell positioned.We cuta piece of cardboardto attach thesyringeto another position,as shown in figure.
Step 7: Painting
After completing the check and corrected minor errors, disassembled the arm as far as giving and paint. After the paint dries, put together definitely.
Step 8: Filling the Syringe
We chose four colors to color the water and fill the syringes.
Fill the hose and then put a syringe (without air inside - close) on one end. Fill another syringe (not filling all) and put the other end. Check the operation.
Step 9: Final Result
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