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Work proposal

Design and construct an object that can raise and lower loads. The object in question must incorporate a gearbox pulley.

design object as we have done using motion transmission system a pulley and belt system. We made a double pulley:

• is a pulley that has the axis of solidarity, that is, a pulley which, when the shaft rotates, so does the pulley.

In this first image the two pulleys are of 10mm plywood and placed together.



other system in the pulleys are separated, we have built a plywood of 10mm and the other with two nuts, two washers and a brass cap.

addition the system incorporates a gearbox pulley is called pulley reducing an operator comprising a motor and a double pulley belts are joined by our case but in other systems can be linked by gears or chains.

This system is used to transform the fast motion and low force, the motor in moving slower but with greater force, pulley.

The electrical circuit incorporating the system is a key crossing. This circuit will allow us to select the direction of rotation. In the next image you can see the circuit and wiring diagram.

Materials needed

• Agglomerate 10mm for the base.
• fir slat 1 * 1 cm in profile.
• 10mm plywood.
• M4 Stud.
• M4 nuts and washers.
• fine conductor wire.
• 1.5 mm wire.
• DC motor. Stack
• flask.
• thread or thin rope. Brass Cap
• 
  

Tools used

• Drill and outer ring.
• keyhole.
• electric welder. Lima
• round and flat.
• melt gun.

MANUFACTURING PROCESS

1. You build a pulley. The size of this block depends on the load we want to raise: the higher the load, the greater will be the radius of the pulley.
2. pulley is placed on supports that are capable of withstanding the load will increase.
3. electric motor is installed, taking into account that:

• The rubber band can not be very tense because the engine will cost you more work to turn the pulley.
• The rubber band can not be little tense, since the motor pulley will slip and not move.

Once we know what position the engine so that the rubber does not skip, stick the engine using hot melt gun.