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image - Coggle Diagram

- - - - Joining elements
      - Controlling and regulating motion
      - Transforming motion
      - Storing energy
      - Transmitting motion
- - - - R is the resistance or load which acts at the other end of the bar.
      - d is the distance from F to the fulcrum
      - F is the force or effort applied at one end of the bar.
      - • 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 muitiphed (d > r)
      - Class 3: The effort applied is between the fulcrum and the resistance. The effect of the effort applied is always reduced (d < r)
      - Class 1 : The fulcrum is between the effort applied and the resistance. The effect of the effort applied can be multiplied or reduced
- - - - A worm screw fulfils this equation:
- - - - This consists of a bolt or threaded bar and a nut that has the same
        interior diameter as the diameter of the bolt.
    - - A crank is a bar attached to an axle that is used to turn it. A winch and crank handle system consists of a drum that rotates and a crank handle that allows to pull or lift obiects. The effort needed to turn the winch is less than it would be if we tried to turn it without the crank handle
    - - This uses a pinion that is a small cogwheel, mounted on a rack that is a
        toothed belt or bar
      - The ratio between the number of rotations of the pinion and the veloaty of
        the movement of the rack is expressed by this equation: L= P .Z .N
  - - - This is composed of a crank and a rod called a connecting rod or link. This rod has articulated joints at each end — one is connected to the crank and the other to the slider
    - - This is a set of connecting rods attached to a jointed axle. Each of the oints of the axle acts as a crank.
    - - This is basically a rotating object that pushes a follower as it moves.
      - A cam transforms rotary motion
        into reciprocating motion in the follower or bar
      - Uses; combustion engines, automatic systems
    - - This consists of a wheel with an off- centre rotation axle that doesn't coincide with the centre of its circunference
      - It transforms the rotary motion of the wheel into reciprocating motion in the follower. The distance between the centre of the circumference and the rotation axle is called eccentricity.
      - Uses: sewing machines, windscreen, wipers
- - - - Band brakes consist of a metal band that puts pressure on a drum attached to the axle of the oblect we want to slow down
      - Drum brakes include one or two brake shoes that come into contact with the drum.
      - Disc brakes consist of pads and a disc attached to the oblect that we want to slow down
  - - - work in different ways:
        
        By traction
        
        By torsion.
        
        By compression
  - - - MoVable connections are used to connect shafts that can move
        along the axle or at an angle to each other.
      - Fixed connections are used to make permanent connections
        between axles and shafts