seamless transmission
seamless transmission
Seamless transmission by Zeroshift
seamless transmission
seamless transmission
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seamless transmission
Seamless transmission by Zeroshift
seamless transmission
seamless transmission
yamaha will be using this tech today
the seamless basically let run two gears in at the same time for a moment:this happens couse the seamless system provides a hub on each shaft. one between the gears of the first and second, one between second and third, etcetera. On this hub there are three pairs of "opposite direction-grooved" cursors on the two sides, in such a way the three sliders can engage the first gear, but will disengage (a bit like a slipper clutch) when the gear speed is superior to the one of the hub.
same thing for the other three cursors on the second gear side. as soon as the three on the first gear side disengage, the second gerar side cursors automatically disengage the hub and engage the gear.
Pink Floyd – Time
To me this reduces the time between shifts, but it does not reduce the torque pulse as claimed. (what does rossi know anyway) All this does is avoid the situation where a conventional dog has to wait 120 degrees to grab the gear.
yes
It also appears to allow you to shift straight from first to second instead of having to skip past neutral so to speak. I think that will prove to be a big advantage and will be cool on road bikes too.
Both gears float on the output shaft shown and are driven via mating gears connected to the input shaft with 1st gear on the left and 2nd gear on the right.
Drive is taken up when the drive ring on the right moves left and connects with 1st gear. Overrun backlash is taken up when the drive ring on the left moves left and connects with 1st gear.
To change into gear, the unloaded drive ring on the left is shifted through into 2nd gear, while still driving in 1st. As 2nd gear is rotating faster, drive is only handed over when the drive faces connect. At this instant, drive is relieved from 1st gear and to complete the shift, the now unloaded drive ring on the right is shifted through to take up overrun backlash in 2nd gear.
Taken from Zeroshifts website.
mi
video doesn't explain anything
Looks like a conventional car Gbox with the hub splined to the output shaft and free spinning gears driven by the counter-shaft, but with special selector rings – car uses one fork – and hub.
It looks like the rings have big blocks that key into the centre hub, and small tabs that engage with the 3 plateau blocks on the face of the gear.
The right ring moves left, to the centre, and grabs the output shaft somehow – ? – and starts the OP shaft spinning.
The left ring moves left and engages with 1st gear plateau blocks, and then moves right to disconnect 1st while keeping the shaft spinning – ? – .
The right ring moves right and engages with 2nd gear plateau blocks, and the shaft spins faster.
I can't see how centring a ring grabs the shaft, unless the ring's large hub blocks go through to the other side of the hub and engage with the opposite gear face, so I would like to see a clearer video or commentary to tell you how that works.