Constant Mesh Gearbox
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Constant Mesh Gearbox
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Model information
- Source
- Printables
- Category
- Mechanical Parts
- License
- Creative Commons — Attribution — Noncommercial — NoDerivatives
In this type of gearbox, all the gears of the main shaft are in constant mesh with the corresponding gears of the countershaft. Sliding dog clutches are provided on the main shaft.
Three forward gears, one reverse gear, neutral.
Printing
Avoid over-extrusion and elephant foot.
I used PLA filament, layer height 0.16 mm.
Dimensions: 122 x 75 x 100 mm.
Weight: 0.15 kg.
Assembly
A - Build the Main Shaft. All gears must run freely on the Main Shaft. Screw the axle halves.
B - Build the Counter Shaft. All gears must be glued to the Counter Shaft. Screw the axle halves.
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 Forks over the Sliding Dog Clutches.
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 Forks.
I (re)designed this model in Layerling as a design learning experiance.
"Old" Tinkercad design: