Gears - Revision history

Lynch: /* Spur Gears */

2011-03-02T13:34:04Z

Spur Gears

2011-03-02T13:25:01Z

Planetary Gears

2011-03-02T13:24:39Z

Planetary Gears

2009-02-10T20:09:35Z

Harmonic Drive Gears

2009-02-10T17:04:49Z

Harmonic Drive Gears

2006-12-28T02:42:49Z

Planetary Gears

2006-12-27T19:21:35Z

Gear Meshing and Forces

2006-12-27T19:21:23Z

Gear Geometry

2006-12-27T19:20:59Z

Gear Geometry

2006-12-27T19:18:55Z

Gear Geometry

@@ Line 30: / Line 30: @@
 ! [[image:spur gears.png|125px|center]] !! [[image:gear-spurgearhead.jpg|125px|center]]
 |}
+[[Image:globe-gearhead.jpg|thumb|300px|Inside the Globe motor gearhead.|left]]
+[[Image:globe-gearhead-closeup.jpg|thumb|300px|A closeup of the gearhead, clearly showing 5 stages of spur gear reduction (the gearhead output shaft is disconnected) resulting in a 187.68:1 gear ratio.|right]]
 <br clear=all>

@@ Line 66: / Line 66: @@
 ===Planetary Gears===
-<!--
 {| align="left" cellpadding = "25"
 ! [[image:gear-planetary-anim.gif|center]] !! [[image:gear-planetarystage.jpg|125px|center]] !! [[image:gear-planetary.jpg|125px|center]]
 |}
--->
 <br clear=all>

@@ Line 66: / Line 66: @@
 ===Planetary Gears===
+<!--
 {| align="left" cellpadding = "25"
 ! [[image:gear-planetary-anim.gif|center]] !! [[image:gear-planetarystage.jpg|125px|center]] !! [[image:gear-planetary.jpg|125px|center]]
 |}
+-->
 <br clear=all>

@@ Line 89: / Line 89: @@
 |-
 | [[image:gear-harmonicdrive2aligned.jpg|400px|center]]
+|-
+| [[image:gear-harmonic-drive-anim.gif]]
 |}
-[[image:harmonic-drive.mov Movie of a harmonic drive]]
 <br clear=all>

@@ Line 91: / Line 91: @@
 |}
+[[image:harmonic-drive.mov Movie of a harmonic drive]]
-<br clear=all>
+<br clear=all>
 ==Spur Gear Geometry==

@@ Line 102: / Line 102: @@
 <br clear=all>
-==Gear Meshing and Forces==
+==Spur Gear Meshing and Forces==
 Gear meshing results in contacts with normals along the line of action, so the resultant force, <math>W</math> is along this line.  This results in both tangential and radial forces, <math>W_t</math> and <math>W_r</math>, on the gear pair.  When these gears are mounted on a shaft, the radial force causes a bending moment while the tangent force causes both a bending moment and a torque.
 [[image:gear triangles.png|center]]
 ==References==

← Older revision		Revision as of 19:21, 27 December 2006
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	==Gear Geometry==		==Spur Gear Geometry==
	For external spur gears (most common), the gear geometry is as shown in the figure below. The '''''line of action''''' is the line that passes through the intersection of the pitch circles and also tangent to the base circles.		For external spur gears (most common), the gear geometry is as shown in the figure below. The '''''line of action''''' is the line that passes through the intersection of the pitch circles and also tangent to the base circles.

@@ Line 97: / Line 97: @@
 For external spur gears (most common), the gear geometry is as shown in the figure below.  The '''''line of action''''' is the line that passes through the intersection of the pitch circles and also tangent to the base circles.
-[[image:gear-spurdetails.jpg|left]]
+[[image:gear-spurdetails.jpg|center]]
-[[image:gear circle geometry.png|right]]
+[[image:gear circle geometry.png|center]]
 <br clear=all>