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MECHANISMS - Coggle Diagram

- - - - The resistance is between the fulcrum and the effort applied.
    - - The effort appled is between the fulcrum and the resistance.
    - - The fulcrum is between the effort applied and the resistance.
- - - - The ratio between the rotation velocity of the wheels or pulleys depends on the relative size of the wheels. It is expressed by the following expression:
        N1·D1 = N2·D2 => D1/D2 = N2/N1
      - Friction drives are made up of two or more wheels that are in contact.
        The first wheel is called the primary drive wheel. When it moves, it turns or drives the second or output wheel, causing it to move as well.
    - - They consist of two pulleys or wheels that are a certain distance apart. Their axles are parallel and they rotate simultaneously due to the effect of the belt.
    - - Cogwheels are sets of wheels that have teeth called cogs. The cogs fit into the spaces between the cogs of another wheel, so that one wheel moves the other.
      - The ratio between the rotation velocities of the wheels depends on the number of teeth on each wheel. It's expressed by this equation:
        N1·Z1 = N2·Z2 => Z1/Z2 = N2/N1
    - - This is a screw that moves a helical cogwheel that is set perpendicular to the screw.
      - A worm screw fulfils this equation:
        Nwheel = (Nscrew·Zgrooves)/Zwheel
    - - These are two cogwheels with parallel axles that are a certain distance apart, they rotate simultaneously by means of a metal chain or a toothed belt stretched over both wheels.
      - The relation between the rotation velocities of the wheels depends on the
        number of teeth on each gear:
        N1·Z2 = N2·Z2 => Z1/Z2 = N2/N1
    - - This is a system of more than two gears connected together.
      - The gear ratio between the drive wheel(1) and the dnven wheel(4) depends on the number of geared teeth in the system:
        N4/N1 = (Z1·Z3)/(Z2·Z4)
    - - It's a system of pulleys, or wheels, with a belt
        formed by more than two wheels
      - The gear ratio between the drive pulley(1) and the driven pulley(4) depends on the relative size of the pulleys in the system. It's expressed as a function of their diameters:
        N4/N1= (D1·D3)/(D2·D4)