Gear noise revisited

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R
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I know this is a redundant problem: 2 gearboxes were replaced without success, and only an entire swing arm replacement with a well calibrated engine could solve solve my gearbox noise. But after 10.000 km my new gearbox is getting noisy again... After reading some gearbox topics I couldn't find a clear solution to reduce that ugly noise. The vectrix rear panels behave like a cage amplifier due to its concave geometry. Some noise absorbent placed behind this panels could prevent some noise to get to the rider, but it would be more intelligent to solve the problem that causes the noise...

Anybody found a way to reduce the gearbox noise? many thanks.

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Mik
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Re: Gear noise revisited

Eyeinthesky has done some dampening of sorts, but I do not know how exactly.

The most important point is to be certain that the noise is not a symptom of something nasty that needs attention!

And sounds are oh-so-hard to describe!

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richard_durant
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Re: Gear noise revisited

The problem is that the gear teeth are inexplicably straight cut, making this "car going in reverse" noise ... The only plausible explanation for this is to make the Vectrix noisy enough to warn pedestrians. What a pity for people like me used to drive perfectly silent electric vehicles !

Richard.

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antiscab
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Re: Gear noise revisited

richard_durant wrote:

The problem is that the gear teeth are inexplicably straight cut, making this "car going in reverse" noise ...

straight cut gears are more efficient, cheaper to make, stronger, lighter and more reliable than the helical cut gears found in most cars and bikes.

its the first reason why straight cut gears are used in *every* vehicle where economy was the highest priority (vectrix, impact, ev1,iMEiV, etc).

Matt

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Daily Ride:
2007 Vectrix, modified with 42 x Thundersky 60Ah
Vectrix 60Ah Lithium Tyres Fuel Registration Insurance cycle analyst replacement TC Charger
conversion
Spent so far: $5800 + $7000 + $1720 + $960 + $320 + $720 + $140 + $600
Cost to do it again: $2500 + $5600 + $1720 + $960 + $320 + $720 + $140 + $600
Cost for a Petrol bike:$6000 + + $1440 + $6000 + $800 + $1400 + $3200 servicing
Total spent: $17260
Total to do again: $12560
Total to have used a petrol bike: $18840
Total distance travelled so far: 79'120km

oobflyer
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Re: Gear noise revisited

I must admit I had no idea that there were gears on the Vectrix! Where are they? I thought the hub-motor configuration eliminated the need for gears!

AndY1
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Re: Gear noise revisited

There's a plantary gear. There are no gears, planetary gear is only used for ratio between high speed RPMs of the electric motor to the RPMs of the wheel.

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