Mechanical Engineering Flashcards
What does a link do?
It connects two or more parts.
What is guiding control?
It controls the motion of a moving part.
What are the 3 different types of guiding control? Explain them.
1-Translational: Straight motion, (vertical, horizontal diagonal)
2-Rotational: Rotates
3-Helical: spin like a drill
What is lubrication?
It removes friction.
What’s sealing?
It prevents escape of a fluid.
Why do we use support?
To give structure.
What’s a direct link?
The parts are joined directly without another piece.
What’s an indirect link?
Things are attached by using another piece.
What’s a partial link?
If one part moves the other part it is linked to doesn’t have to
What’s a complete link?
If one part moves, the other part moves.
What’s a removable link?
Parts that can be removed without damaging it.
What’s a fixed linked?
Parts cannot be removed without damaging it.
What’s a rigid link?
The linking mechanism does not allow for movement between parts.
What’s an elastic link?
Linking mechanism allows parts to change position and ensures that it will return back to its original position.
What’s a mechanical function?
It’s the role by a mechanism inside a device/complex object.
In a link, how many of the 8 properties does it have to have?
4
What does motion transmission mean?
It’s when a system has the ability to transmit the same motion from one part of the object to another.
Name the 3 mechanisms.
1-motor mechanism
2-intermediate
3-receiving mechanism
What’s a motor mechanism?
It’s where force is applied.
What’s an intermediate mechanism?
It’s what transfers the action of the motor mechanism(driving force) to the receiving mechanism.
What’s a receiving mechanism?
It’s what receives a motion.
The pedals of a bicycle represent the ________ mechanism on which force is applied.
Motor
The chain of a bicycle is the _____________ mechanism that transfers the motion to the back wheel……..
Intermediate
…..Intermediate mechanism that transfers the motion to the back wheel or the ____________ mechanism.
Receiving.
How does a motion transmission system transfer motion from the motor mechanism to the receiving mechanism?
It transfers it without transforming it.
Name 2 motion transmission systems.
1-Translational to translational
2-Rotational to rotational
What are the 3 types of units/components in a mechanical system?
1-Driver
2-Driven
3-Intermediate unit
When the driver is bigger than the driven gear, what happens to the speed?
It increases.
When the driver is smaller than the driven gear, what happens to the speed?
It decreases.
When the driver and the driven are the same size, what happens to the speed?
Nothing, it doesn’t change.
What’s motion transformation?
Its doing a motion from one part to another that changes the nature of the motion.
Give 2 examples of motion transformation.
1-Translational to rotational
2-Helical to translational
