Mechanisms Flashcards
What is the form of movement that moves in a straight line?
Linear
What is the form of movement that moves in a circular motion?
Rotary
What is the form of movement which moves in a back-and-forth motion / arc motion
Reciprocating
What is the form of movement which moves in a swinging motion / side-to-side?
Oscillating
What is the role of levers in a mechanism?
Function (Levers help reduce the amount of effort needed to move a load. They provide mechanical advantage by amplifying force, allowing a small effort to lift a heavier load )
What is the 1st class lever
Fulcrum is positioned between the effort and the load.
: scissors
What is a second class lever
Load is positioned between the fulcrum and effort
: nutcracker
What is a 3rd class lever?
Effort is positioned between the fulcrum and the load.
: fishing rod
What are the linkages in mechanisms?
Function (Linkages can change the direction or magnitude of an input motion. For example, a push-pull linkage changes a linear input into a different linear output in another direction.)
What is a cam?
A can is a shaped rotating component that controls the movement of a follower.
What is a follower?
A follower moves up and down in response to the cam’s shape.
What is the purpose of a Cam and Follower?
They are used to convert rotary motion into reciprocating motion. Cams are often used in engines or automated machinery.
What is the Rise?
When the follower moves upward as the cam rotates.
What is the dwell?
The follower remains stationary as the cam rotates further.
What is the fall?
The follower moves downward as the cam continues to rotate.
What are the four types of gears?
The spur gear (Teeth are straight and mounted on parallel shafts) , the bevel gear (teeth are angled and used to change the direction of drive) , the worm gear (consists of a worm (a screw-like component) that meshes with a gear) , and the rack and pinion (converts rotary motion to linear motion)
What is a gear train?
A set of gears working together, with the output gear rotating in response to the input gear. Gear trains can be used to increase torque or change the speed of movement.
: bicycle gear systems
What is the Friction in a mechanical system?
The resistance that one surface or object encounters when moving over another. It can slow down or stop motion in mechanisms.
What is the lubrication in a mechanical system?
The application of a substance (like oil or grease) to reduce friction, improve efficiency, and extend the life of the mechanism.
