Reciprocating Saw (Sawzall)

By Jackie Ho Objectives:  Introduce different types of motion  Explain the mechanism used in the reciprocating saw

Types of Motion

How do reciprocating saws cut?

 Reciprocating saws convert rotary motion into reciprocating motion

ANSWER!!!

Slider-Crank Mechanism

 a four-bar linkage with 3 revolute joints and one prismatic joint Example: Engine

Other Mechanisms

 Other ways convert rotary motion to reciprocating motion   Cardan Gear Geared Mechanism

The slider-crank mechanism transforms the rotary motion of the motor to reciprocating motion of the blade

References

 http://www.engr.utexas.edu/dteach/Experience /mechanisms/brief_mechanisms.htm

 http://www.cs.cmu.edu/People/rapidproto/mec hanisms/chpt5.html

 http://www.flying pig.co.uk/mechanisms/pages/cardan.html