Zusammenfassung der Ressource
Technology 2
- Mechanisms
- Input: are what you do e.g hole
puncher-push down on lever
- Output: are what happens e.g hole
puncher-holes are punched in paper
- Motion
- Linear: movement
in a straight line
- Reciprocating: movement backwards
and forwards in a straight line
- Oscillating: movement backwards
and forwards in an arc
- Rotary: movement in a complete circle
- Levers
- three parts: effort, load, fulcrum
- Class 1: fulcrum between the effort and the load
- Class 2: fulcrum at one end, the load in the
middle and the effort at the other end
- Class 3: fulcrum at one end, effort in the middle and load at the opposite end
- Linkages
- Reverse motion: top rod moves
to left and bottom moves to right
- opposite directions and the fixed
pivot is centre of rotation
- Push and Pull: large rod at the top of the diagram moves to the
left the two small rods at the bottom move to the right
- rods are parallel
- Double arm: linkage will change a reciprocating
motion into two oscillating motions
- can be found on novelty coat hooks
- Cams
- three parts: follower, axle, cam
- three main types: pear shaped, circular and heart shaped