gearbox bike, belt drive, sequential shift etc.....

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Dingo2024   100 W

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gearbox bike, belt drive, sequential shift etc.....

Post by Dingo2024 » Oct 14 2012 6:37am

another contender........................

http://www.pinkbike.com/news/Roc-DAzur- ... -Bike.html

Ian :D
started as a boy, grew into a man....not sure where I am headed now
build thread; http://endless-sphere.com/forums/viewto ... =6&t=18130
top speed now stands at 43.9 mph

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adrian_sm   10 MW

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Re: gearbox bike, belt drive, sequential shift etc.....

Post by adrian_sm » Oct 14 2012 6:50am

Image
This is what's going on inside here. One thing that Effigear have done that we haven't seen before is offer a range of gearing - there is a full nine-speed box on offer, which weighs in at 1.56kg, but there is also a slimmed down seven-speed box that drops the weight down to 1.39kg. This is possibly the first gearbox we have seen that doesn't have a weight penalty either - Effigear claim it weighs exactly the same as the equivalent Shimano Saint setup.
Image
Build #1 ~28kg ~ 700w Avanti Hardtail Crystalyte 408, 48V10Ah Headway. ~5500 kms to date. (retired)
Build #2 ~30kg ~2000w Giant AC Dually Crystalyte 408, 48V10Ah Headway + 6s10Ah LiPo = 70V. ~15000 kms to date [SOLD]
Build #3 ~13kg ~2000w Commuter Booster <1kg Friction Drive
Build #??? ~21kg ~1500w Adrian's Bafang BPM Hardtail MTB Bafang BPM code12, 15s LiPo, ~40kph, ~30kms

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Miles   100 GW

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Re: gearbox bike, belt drive, sequential shift etc.....

Post by Miles » Oct 14 2012 9:01am


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Miles   100 GW

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Re: gearbox bike, belt drive, sequential shift etc.....

Post by Miles » Oct 14 2012 9:15am

Here's one of the patents (in French)
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WO2008142219A2.pdf
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bzhwindtalker   1 MW

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Re: gearbox bike, belt drive, sequential shift etc.....

Post by bzhwindtalker » Oct 14 2012 9:16am

Holy shit pure mechanical beauty :shock: :shock:

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Miles   100 GW

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Re: gearbox bike, belt drive, sequential shift etc.....

Post by Miles » Oct 14 2012 9:19am

US patent (in English)
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US2010162841A1 Cavalerie gearbox.pdf
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renago   10 mW

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Re: gearbox bike, belt drive, sequential shift etc.....

Post by renago » Oct 14 2012 2:33pm

very smart idea ,
there is also Pinion that makes nice gearbox , and Suntour .
I think it is similar , as concept , to the Honda bike presented some years ago RN01 .
will it withstand the torque that an electric motor has ?

I recently spoke with the engineer that designed the Pinion gearbox , and his product is NOT up to 2000-3000 W of power .
they are planning a more simple gearbox with just 6 speed , for DH use , maybe this can be .

Renago

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fizzit   10 kW

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Re: gearbox bike, belt drive, sequential shift etc.....

Post by fizzit » Oct 14 2012 6:17pm

In the article:
A Gates carbon belt drive transfers the power to the rear wheels - one of the big advantages of the belt drive is that, unlike a chain, it doesn't stretch so all the power is transferred to the rear wheel.
What? :|

The gearbox looks really cool. I wanna build one.
-Colin

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Miles   100 GW

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Re: gearbox bike, belt drive, sequential shift etc.....

Post by Miles » Oct 14 2012 11:17pm

fizzit wrote:What? :|
Yes, it's amazing the drivel you get on some of these bike sites....

keyne   100 W

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Re: gearbox bike, belt drive, sequential shift etc.....

Post by keyne » Oct 30 2012 10:12pm

It's a little odd that the gearbox has quite a different layout to the one described in the patent. The one in the patent uses concentric shafts for the primary and tertiary drives (like the 18 speed pinion gearbox). Maybe they decided they prefer the higher suspension pivot? There doesn't seem to be anything particularly new in their shifting system, looks to be similar to the one described here - http://iris.lib.neu.edu/mech_eng_capstone/69 - only they patented it. It still won't shift to an easier gear well when under load :(


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