Constant Mesh Two Speed Gearbox

prusaprinters

<p>In this type of gearbox, all the gears of the main shaft are in constant mesh with the corresponding gears of the countershaft.&nbsp;A sliding dog clutch is provided on the main shaft.<br><br>Gear ratios 0.75, 1.33 and neutral.<br>This model was designed in Tinkercad.<br>&nbsp;</p><p><strong>Printing and Assembly</strong><br>The parts should be printed on a smooth build plate, not textured.<br>If possible, avoid elephant foot.</p><p>I printed the model on a PRUSA MINI, with PLA+ filament, layer height 0.15 mm.&nbsp;<br>I use Hard Plastic Glue where necessary.</p><p>For assembled and exploded views, use .stl files A0… X0… (do not print).<br>Printing and assembly in alphabetical order (A1 → X1).<br><br>Choise between Spur and Herringbone gears (A4 B2).<br><br>Dimensions: &nbsp;95 x 63 x 101 mm.<br>Weight: &nbsp;0.1 kg.<br>&nbsp;</p><p><strong>Join gearbox to “4 Stroke Flathead Engine” (= 135305)</strong><br>Print parts X1 → X5.<br><a href="https://www.prusaprinters.org/prints/135305-4-stroke-flathead-engine">4 Stroke Flathead Engine by Bootjevaarder | Download free STL model | PrusaPrinters</a></p><p>To couple the gearbox to the engine, the “Cranked Handle” of the engine must be removed.</p><p>The engine, coupling bracket and gearbox click into the “X1-Sled”.<br><i><strong>Important</strong></i>: Part “X2-Coupling Bracket” must be assembled in the correct orientation (ARROW).<br><br><br><strong>Operation</strong><br>Use the cranked handle to rotate the gearbox / engine.<br>To couple / uncouple the gearbox from the engine, use “X5-Coupling Selector Fork”.<br>For shifting gears, use “A3-Selector Fork”.<br>&nbsp;</p>