The Skil Reciprocating Saw has removeable blades to cut materials ranging from wood to metal.
How It Works
The reciprocating saw runs off a 120 Volt, 8.5 Amp motor. At the end of the motor is a spiral bevel gear that is attached to a scotch yoke mechanism. The scotch yoke mechanism converts circular motion to linear motion. Referring to the avi file below, the mechanism involves a circular gear with a pin connected to a shaft. The linear motion is what moves the saw back and forth in its reciprocating motion.
Analysis in ANSYS yields a power output of about ¼ horsepower when cutting a medium sized log. As far as the power output is concerned there is not much as far as improvements. If a larger stoke was implemented, the time required to cut would be reduced significantly. However, a larger stoke implies a larger device which will increase material costs.
The table belows lists the Bill of Materials for the Reciprocating Saw:
|Part #||Part Name||Category #||Function||Material||Picture|
|1||Trigger||Switch||Control electrical signal||Plastic, copper wires|
|2||Variable speed control||Speed control||Control speed of blade||Plastic, copper wires|
|3||Insulated Bearing||Support Element||Allows rotation of motor||Steel|
|4||Motor||Input||Turns to drive gears||Copper wire, steel wire|
|6||Bearing||Support element||Allows motor and spiral bevel gear to rotate||Steel|
|7||Spiral bevel gear||Transmission motion conversion||Changes direction of rotation from motor||Steel|
|8||Brushes||Input||Electric signal causes motor rotation||Nickel, iron, cobalt|
|9||Shaft||Support element, motion conversion||Convert circular movement to linear||Stainless steel|