Driveshaft Selection

[SNIPE]

Hi

Im trying make my gearbox drive both driveshafts but so I can optionally bypass this and have just one or the other driveshaft driven,

im using a shaft with a clutch that is moved to either select one clutch gear or the other, and bypass the gearbox that drives both driveshafts this is to be used for selecting only

one drive shaft - it cannot select both.

How can I do this, Ill post diagrams if needed.

Edited April 4, 2014 by SNIPE

[EvilEnderman]

I think some pictures would be nice for us, in order to get a little context about it

:) -Enderman

Edited April 4, 2014 by EvilEnderman

[Marcel1980]

Im thinking you are looking for a gearbox that can switch between 2wd and 4wd? If so, just look at Allanp transpher case in the 4th post of this threath ; http://www.eurobricks.com/forum/index.php?showtopic=70118

[SNIPE]

Video of the drive selector http://tinypic.com/player.php?v=e9ga3q&s=5#.Uz6jd8esb-k

The drive selctor image showing the internal axle (purple)

The gearbox itself:

Regards, s

[Rockbrick]

I think what is wanted is something that would switch between FWD or RWD or 4WD - if that was the application .... ?

Im thinking you are looking for a gearbox that can switch between 2wd and 4wd? If so, just look at Allanp transpher case in the 4th post of this threath ; http://www.eurobrick...showtopic=70118

[SNIPE]

yes but in such a way that the gear lever can do it hence the custom clutch sleeve on the drive selector, a normal one wouldn't work well'

the selector is right beside the normal clutches on the gearbox (image 2) so the gear lever fits in.

[SNIPE]

Hopefully this should explain a bit better:

Yes there is gears under the clutch gears for the different speeds

the 4 stacks in the 3 diagrams are on axles of course, the one with the yellow half bushes is also 'shifted', using the gear lever. (that is the drive select)

I can either do it in the diagram or have the gearbox outputs linked to the two gears on the rive select however the drive select cannot select both gears at the same time.

Regards, S

Larger Image Here: http://oi59.tinypic.com/i6mbo9.jpg

Relative Parts:

http://img.bricklink.com/P/3/4265c.gif

http://img.bricklink.com/P/5/6539.gif

http://img.bricklink.com/P/86/32187.gif

Edited April 6, 2014 by SNIPE

[SNIPE]

I think I have solved it, instead of trying to have the transfer case disconnect drive-shaft A or B it now also can drive A AND/OR B. I made the middle position for the transfer case that would normally be 'neutral', '4WD' instead, I did this by adding a fixed gear on the end that when the axle slides in the runners that axle slides into engagement with another axle that goes to both drive shafts, when the clutch in the transfer case is engaged to a clutch gear , the end- gear slides out of engagement and the clutch gear goes to the corresponding drive shaft.

Possible Problems:

The axle only slides a very small amount so it may not be enough to disconnect the end axle completely. and adding this end axle makes it a bit more bulky.

Teeth may be damaged unless I used a technic knob wheel.

Edited April 10, 2014 by SNIPE

[Hrafn]

I think I have solved it, instead of trying to have the transfer case disconnect drive-shaft A or B it now also can drive A AND/OR B. I made the middle position for the transfer case that would normally be 'neutral', '4WD' instead, I did this by adding a fixed gear on the end that when the axle slides in the runners that axle slides into engagement with another axle that goes to both drive shafts, when the clutch in the transfer case is engaged to a clutch gear , the end- gear slides out of engagement and the clutch gear goes to the corresponding drive shaft.

Possible Problems:

The axle only slides a very small amount so it may not be enough to disconnect the end axle completely. and adding this end axle makes it a bit more bulky.

Teeth may be damaged unless I used a technic knob wheel.

Would it be possible to share a photo of your solution? I'm curious to see it, and gear setups are hard to understand from verbal descriptions alone. Thanks!

[SNIPE]

As you can see, the light grey gear can be shifted into the the light grey gear to select both wheels, the whole axle but the clutch gears and case moves when shifted. this engages the custom clutch+ into the dark grey gears using the gear stick., the red clutch+clutch gears set just for the gearbox itself., There is more of those in the entire assembly.

The custom clutch has two bushes inside of the parts labeled as transparent,this meshes and locks it to the axle, normally it would slide along the axle and would not rotate with it.

The Gap in the custom clutch needs to be wide enough for the lever to engage the drive but then back out again without pulling the clutch from the gear

Edited April 11, 2014 by SNIPE