Constant Mesh 3 Speed Gearbox with Reverse Gear by Bootjevaarder

Bootjevaarder

Hobby & DIY>Vehicles

Print Profile(1)

All

X1 Carbon

P1S

P1P

X1E

4 colours PLA with AMS, 0.15mm layer, 3 walls, 15% infill

23.2 h

5 plates

5.0(3)

Boost

193

170

Released

Description

In this type of gearbox, all the gears of the main shaft are in constant mesh with the corresponding gears of the countershaft.
Two sliding dog clutches are provided on the main shaft.
Gear ratios: 1.38, 1.00, 0.78, reverse 1.86 and neutral.
Dimensions: 143 x 65 x 100 mm.
Weight: 0.15 kg.
2-speed gearbox: Constant Mesh Two Speed Gearbox by Bootjevaarder | Download free STL model | Printables.com

Printing
The parts should be printed on a smooth build plate.
If possible, avoid elephant foot.
I printed the model on a PRUSA MINI, with PLA+ filament, layer height 0.15 mm.
Glue with Hard Plastic Glue where necessary.
Printing instructions are provided with every .stl file.

Assembly
Assembly in alphabetical order.
Assembly instructions can be found in 10 screenshots.

The gearbox can be joined to compatible 4-stroke engines
Print parts “N - Sled and Engine Connection.stl”.
To couple the gearbox to the engine, the “Cranked Handle” of the engine must be removed.
The engine, coupling bracket and gearbox click into the Sled.

Compatible 4-stroke engines:
4 Stroke 4 Valves Over Head Camshaft Engine by Bootjevaarder | Download free STL model | Printables.com

4 Stroke Flathead V-Twin Engine by Bootjevaarder | Download free STL model | Printables.com

4 Stroke Flathead Engine by Bootjevaarder | Download free STL model | Printables.com

Operation
Use the cranked handle to rotate the gearbox / engine.
For shifting gears, operate the Sliding Dog Clutches.
To couple / uncouple the gearbox from the engine, operate the clutch lever of the "N - Engine Connection”.

Comment & Rating (6)

@SteveY

Boosted

Great design, I like it! One little problem; there is too much play in the sliding dog clutches; they can be glued at a slight angle, that you'll likely only notice after building it in... Potential improvements; - angled dowels, so you wouldn't need glue on the house (would help with fixing small eff-ups) - tightening the play on the dog clutch - connecting the shifters so it's a single-stick shifter

(Edited)

The designer has replied

@Bootjevaarder

Thanks for your feedback! - I do not understand what you mean by angled dowels, Can you explain? - Where in the design of the dog clutches should the play be less? - Haha, connection the shifters would make it impossible to shift: it would block the gearbox. Only a complete redesign would help.

@SteveY

Boosted

Replying to @Bootjevaarder :

- Dowels: I mean dowels that would be slightly conical, so they'd stick together when inserted all the way, but still removable. Or some other way to allow disassembly. - dog clutch: I've managed to put the two parts of it together with a slight offset, so the end result is that they wobble and occasionally engage the gear. Sadly now it's all glued together so there's that. But if it had less play on the axle, I could not have put it together like this - or if the two bits would fit together tighter, maybe without glue... - I see. I have a wooden version, that looks & works very-very similar, and they've created a plate for the shifter that manages the magic. It's a Ugears StemLabs gearbox, in case you want to look it up. Regardless, all in all, it's a fantastic design and a very cool print, love it :)

(Edited)

@Doommaster437

Print Profile

4 colours PLA with AMS, 0.15mm layer, 3 walls, 15% infill

cool

@Krille

Print Profile

4 colours PLA with AMS, 0.15mm layer, 3 walls, 15% infill

lyckad utskrift

@user_871029714

Print Profile

4 colours PLA with AMS, 0.15mm layer, 3 walls, 15% infill

My 10 year old didn't break it despite all efforts. good build.

No more

License

This work is licensed under a Standard Digital File License.

You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.

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Comment & Rating (6)

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