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Mechanisms - Coggle Diagram

- - - - F x d= R x r
        
        F is the force or effort applied at one end of the bar
        
        R i s the resistance or load which acts at the other end of the bar.
        
        d is the distance from F to the fulcrum
        
        r is the distance from R to the fulcrum
    - - Class 2
        
        The resistance is between the fulcrum and the effort applied. The effect of the effort applied is always multiplied.
      - Class 3
        
        The effort applied is between the fulcrum and the resistance. The effect of the effort applied is always reduced
      - Class 1
        
        The fulcrum is between the effort applied and the resistance. The effect of the effort can be multiplied or reduced.
- - - - Fiction drives are made up of two or more wheels that are in contact. N1· D1=N2 · D2
    - - They consits of 2 pulleys or wheels that are a certain distance apart.
    - - The ratio between the rotation velocities of the wheels depends on the number of teeth on each wheel. It's expressed by this equation: N1x Z1= N2 x Z2
    - - A worm screw fulfils this equation. N wheel= N screw x Zgroovers/ Z wheel.
    - - The relation between the rotation velocities of the wheels depends on the number often on each gear. N1 x Z1= N2 x Z2
    - - he gear ratio between the drive wheel (I) and the dnven wheel (4) depends on the number ol geared teeth m the system: N4/N1= Z1 x Z3/ Z2 x Z4
    - - The gear ratio between the drive pulley (1) and the driven pulley (4) depens on the relative size of the pulleys in the system. N4/N1= Z1 x Z3/ Z2 x Z4