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This is a massager for your muscles/back. It's official product name is “lunar rover massager” that used to be quite popular in China.
We had one in the family for 20+ years. Recently my mom broke my grandma's, and asked me to fix it. Instead of just fixing the broken handle, I just recreated the entire design in Fusion 360, and optimized it slightly for FDM printing.
Printer Settings:
- 0.4mm nozzle
- 0.12mm layers
- 4 perimeters
- Gyroid infill, 15%
- Tree support for the handle
- Normal support for everything else
Print Parts:
- 1x handle
- 16x wheels
- 8x short leg
- 4x long leg
- 4x long peg/pin (used for attaching long leg to the handle)
- 16x short peg/pin (used for wheels)
- 8x peg/pin with protrusion (rotation limiter for short leg attachment to long leg)
Assembly Notes:
- Make sure the parts fit losely/turns - trim/sand slightly if not (designed with 0.5mm gap)
- gently hammer/tap the pin/peg into place
- Use some lubricant (silicone or whatever you use to lubricate your printer screws) would make the wheels spin more freely if your printer's tolerance isn't as good
- Wheels have an inside and outside - the side with shorter “bearing” faces outside so the pins sit flush
Updates
- Feb 22, 2024: new version with significant updates to how the pins/pegs work, now stronger and more “round” for better tolerances and wheel spin.
siming_designs
