Mechanical Devices

Question 1

What are the different types of movement?

Answer 1

Linear- one direction along a straight line
Reciprocating- Repetitive back and forth
Rotary- Movement on or around an axis - circular
Oscillating- Movement back and forth along an arc

Question 2

What is a first order lever?

Answer 2

Fulcrum is between the effort and load - like scissors

Question 3

What is a second order lever?

Answer 3

Fulcrum at one end with effort at opposite end. The load is in the middle. Like a wheelbarrow

Question 4

What is a third order lever?

Answer 4

Fulcrum at one end, load at other end, load in the middle. Like tweezers

Question 5

What is a push pull linkage?

Answer 5

Maintains direction of the input motion so that the output travels in the same direction.

Moving pivots with fixed pivots in middle.

Question 6

What is a bell crank linkage?

Answer 6

Changes the direction of the input motion by 90 degrees.