Punchblog430

• Design Of Bell Crank Lever Valve
• Design Of Bell Crank Lever Diagram
• Bell Cranks And Linkage
• Bell Crank Design

What is a lever?

A lever is a rigid bar that pivots about a fulcrum. It transmits an input motion and force, (the effort) through the lever pivoting on a fulcrum to a resistance force called a load.

A bell-crank lever consists of a long arm, 8 1 2 in. Long, and a short arm 4 in. Long, at right angles to each other. Calculate the force to be applied at right angles to the end of the long arm to overcome a resistance of 40 lbf acting at 30° to the vertical of the short arm. In this project Optimum Design of Bell Crank Lever was designed by considering some properties like Density, Young's modulus, Ultimate tensile strength, Yield Strength, Shear modulus, Cost.

Design Of Bell Crank Lever Valve

Load

The load is anything that is being moved by a lever.

Effort force

The effort force is the energy applied to a lever to move a load.

Fulcrum

The fulcrum is the point at which the lever pivots. A lever may rest on a fulcrum or it may swivel on an axle, e.g. a see-saw (class 1 lever) and a wheel barrow (class 2 lever).

Classes of lever

There are three classes of levers. Each class of lever has the load and effort force in specific positions relative to the fulcrum.

Class 1 lever

A Class 1 lever has the fulcrum between the load and the effort force.

Class 2 lever

Design Of Bell Crank Lever Diagram

A Class 2 lever has the load between the fulcrum and the effort force.

Class 3 lever

Bell Cranks And Linkage

A Class 3 has the effort force between the load and the fulcrum.

Bell Crank Design