Forward & Reverse Gearbox
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Forward & Reverse Constant Mesh Gearbox
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- Engineering
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- Creative Commons — Attribution — Noncommercial — NoDerivatives
In this type of gearbox, the gears of the main shaft are in constant mesh with the corresponding gears of the countershaft. A Sliding dog clutch is provided on the main shaft.
Printing
Avoid over-extrusion and elephant foot.
I used PLA filament, layer height 0.16 mm.
Dimensions: 86 x 75 x 100 mm.
Weight: 0.1 kg.
Assembly
A - Build the Main Shaft. The gears must run freely on the Main Shaft.
B - Build the Counter Shaft. The gears must be glued to the Counter Shaft
C - Place the Small Gear and glue the Knob in one side of the Gearbox Case. Glue the Case Inserts in place.
C - Place the Main- and the Counter Shaft between the Gearbox Case halves.
C - Glue the Gearbox Case halves.
D - Click the Selector Fork over the Sliding Dog Clutch.
D - Glue the other External Axle Parts to the Main- and Counter Shaft.
E - Glue the Stand to the Gearbox Case.
Operation
Use the Cranked Handle to rotate the gearbox.
For shifting gears, use the Selector Fork.
I (re)designed this model in Layerling as a design learning experiance.
"Old" Tinkercad design: