Linkages and Mechanisms

Question 1

What is a mechanism?

Answer 1

An arrangement of elements into a system to transmit motion in a predetermined fashion.

Question 2

What is kinematics?

Answer 2

The study of motion without regard to forces.

Question 3

What are degrees of Freedom?

Answer 3

The number of independent parameters that define an objects position in space.

Question 4

What is a joint?

Answer 4

A connection between two or more parts of a mechanism.

Question 5

How do we classify joints?

Answer 5

The type of contact
The number of degrees of freedom
the number of components connected by the joint

Question 6

What is a link?

Answer 6

It is a component of a mechanism. It can be classified by the number of components that it has with other components.

Question 7

What is a chain?

Answer 7

An assemblage of links and joints to provide a controlled output motion in response to a supplied input motion.

Question 8

What is Grueblers condition?

Answer 8

It allows us to predict the degrees of freedom for a mechanism.
DOF = (3 x number of links) - (2 x number of joints)
number of links does not include grounded links.
The number of joints reflects the value of each joint.

Question 9

What is the value of a 1 DOF joint??

Answer 9

1

Question 10

What is the value of a 2 DOF joint?

Answer 10

0.5