Date post: | 12-May-2015 |
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Technology |
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Technological design Engineering Alexandre De Bie
Hub gears for dummiesSturmey Archer
3 Speed Hub
Technological design Engineering Alexandre De Bie
What’s Inside
Technological design Engineering Alexandre De Bie
Driver and sprocket
Technological design Engineering Alexandre De Bie
Technological design Engineering Alexandre De Bie
Hub Planetary Gearing
Technological design Engineering Alexandre De Bie
Hub (Wheel)
Hub Teeth
Technological design Engineering Alexandre De Bie
Planetary Gearing
Section
Sun (Fix)
Gear ring
4 planets
Technological design Engineering Alexandre De Bie
Axle and Sun gear
Sun gear
Axle
Technological design Engineering Alexandre De Bie
Planet Cage with Planets
4 Planet axles
4 Planets
2 Planet cage pawl Cage
Technological design Engineering Alexandre De Bie
Gear ring
4 Tabs2 Pawls Gear ring teeth
Bottom View
Technological design Engineering Alexandre De Bie
Sprocket - Planetary gearing connection
SprocketClutch
Planet axle
Technological design Engineering Alexandre De Bie
Planetery gearing – Hub Connection
Hub teeth Gear ring pawlCage pawl
Technological design Engineering Alexandre De Bie
Choosing the speed 3rd Speed
2nd Speed
1st Speed
Spring Force
Technological design Engineering Alexandre De Bie
3rd speed (High)Clutch rest against planet axle
How it works
Technological design Engineering Alexandre De Bie
Cage rotates 90°Gear ring 120°
Driver drives the planet cagePlanet cage drives the gear ring.
Cage rotates 3 timesGear ring rotates 4 times
90°120°
Gear ring connectedto hub with pawl
Hub drives as fast as gear ring
Make 3 rotation with the driverto make 4 rotations with the wheel
Technological design Engineering Alexandre De Bie
2nd Speed (Normal)
Contact with cage lost
Clutch rest against tabs from the gear ring
Technological design Engineering Alexandre De Bie
Driver drives the gear ring
Gear ring connectedto hub with pawl
Hub drives as fast as gear ring
Make 1 rotation with the driver to rotate the hub 1 time
Technological design Engineering Alexandre De Bie
1st Speed (Low)
Clutch rest against tabs from the gear ringAnd blocks the gear ring pawls
As in the 2nd speed no contact with the cage
Technological design Engineering Alexandre De Bie
2nd Speed pawl not blocked 1st Speed clutch blocks pawl
Gear ring is unable to grab in the hub teeth
Technological design Engineering Alexandre De Bie
Gear ring 120°Cage rotates 90°
Driver drives the gear ringGear ring drives the planet cage
Gear ring rotates 4 timesCage rotates 3 times
90°120°
Planet Cage connectedto hub with pawl
Hub drives as fast planet cage
Make 4 rotation with the driverto make 3 rotations with the wheel
Technological design Engineering Alexandre De Bie