doug72 Posted June 8, 2016 Posted June 8, 2016 (edited) Using instructions download for Sariel’s 4 speed sequential gear box I first built it to see how it functioned and then used it as a starting point to develop a change over device for various planned GBC modules. Two units were developed using the old and new type driving rings contained within 7L x 5L studless frames By using different gear combinations different speeds can be obtained for the reversing motion - for really slow speed another worm reduction stage can be added between the M motor and reversing unit. The two units shown have 24:1 and 40:1 reduction. Minimum possible 8:1 Maximum 1600:1 The output crank is 2L and drive crank for c/o driving ring lever is 3L which gives very little flexing in the structure as it rotates. Connecting rod is 8L centers. Images below should show how these were constructed & the differences between the two units. Top view: Top image using old type driving rings / Bottom showing newer type driving rings IMG_3665 by Doug Ridgway, on Flickr Underside view showing gearing arrangement for old (top) and new(lower) The reversible outputs can be taken from any of the 4 axles. IMG_3666 by Doug Ridgway, on Flickr Side view: showing top worm:24T reduction. A 8T gear is between worm and 3 & 24T gear to keep crank axle at same level. Lower has 40:1 reduction. IMG_3667 by Doug Ridgway, on Flickr Opposite side view IMG_3668 by Doug Ridgway, on Flickr End on view showing crank arms IMG_3669 by Doug Ridgway, on Flickr Edited June 8, 2016 by Doug72 Quote
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