Gearing Up- Bevel Gears

ZooHead

Well-known member
I thought I'd revisit one of my favorite objects, gears.
Specifically bevel gears, which I don't remember doing before.

I start with a cone half as tall as it is wide, so I match
the height and radius to get 45 degrees in profile.

Bevel Gears alt.jpg


Mesh Test02.jpg


Mesh Test.jpg
 

ZooHead

Well-known member
Although this isn't a bevel gear, it's part of a separate drive
system which will be under the Modular Motion Blocks.

I needed something which will produce high torque so the worm gear seemed to be a good choice.

Unlike standard straight cut gears, usually called a spur gears,
a worm gear produces thrust forces along the axis of both gears.

The thrust force is greatest on the worm gear, but because it's companion
gear is cut at a slight angle, it will experience some thrust force as well.

Worm Drive.jpg


wormdrive.gif
 

ZooHead

Well-known member
I've just worked out the gears to get the sphere spinning
twice as fast but reverse of the rotation of the big gear.

MMB gears.jpg
 

ZooHead

Well-known member
You can't have a spinning wheel without some sort of bearings.

If you look into watch and clock making, there are no ball bearings,
except for really big clocks like tower clocks and the like I suppose.

Watches have a bushing type of bearing, which is just an axle in a hole,
the hole is usually in a piece of polished corundum either sapphire or ruby.

Clocks have metal bushings pressed into the metal plates used to build the clock.

For my huge bevel gear I had no choice due to it's weight, size and orientation.
Not to mention the big hole in the bottom for the axle of the drive system.

I concluded the majority of force on this wheel is along the axle, which is called thrust force.
And not coincidentally these bearings are called thrust bearings.

MMB bearings.jpg
 

ZooHead

Well-known member
I fashioned a 90 degree standoff to mount the side plates.
I think these plates should have some decorative piercing.

Side Supports.jpg
 

ZooHead

Well-known member
In Photoshop?!
Good work.
I used PS paths to create the base pattern in the shape of a right triangle.

Stroke the paths and trim the short edges. then copy, paste, flip and merge layers.
Repeat it again so you have a diamond shape, then rotate 45 degrees.

Now you have a square. Do the copy paste flip merge thing two more times.

Did you notice how the pattern looks "round", but the patterns that create it are linear?
 
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