美国宇航局（RASSOR）桶鼓设计挑战与设计VPR 21

Desig advantages: ANTI JAMMING MOVABLE SIDE OF SCOOP, 3 sec. UNLOADING, SELF CLEANING AND SAVING ELECTRICITYDescription of how VPR 21 design works:Bucket drum and scoops separately connected to slightly modified arm gearbox on existing Rassor. In such a way, that drum and scoops can rotate together or independently, but cannot rotate scoops in CCW direction if drum is not rotated with it. Bucket loading: In contact with regolith, bucket inner drum is positioned with opening on top, scoops are rotating and filling on the bottom, then lifting it and unloading in the bucket on top side. On the top, filled scoop rotated by gravity, will unload regolith in bucket and in same time unjammed bigger rock on the scoop the filling exiting position, lifted scoop by bucket edge will close by hitting outer wall of rotating bucket blades assembly creating vibratio that will clean loose unloading: Bucket drum and scoops are rotating at the same time and stopping by positioning bucket opening down. Regolith will start to unload, by rotating bucket blades assembly for 90 degrees all regolith will be als: glued carbon fiber, welded titanium sheets, modified 623ZZ ball bearings NASA (RASSOR) Bucket Drum Design Challenge Design VPR 211 Bucket drum mass: 4,998 kg2 Bucket drum diameter: 450 mm3 Bucket drum length: 300 mm4 Volume of captured regolith: 24,092 l5 Scoops width engaged at any given time: 147 mm6 Design fill ratio: 50.5 % ((Ø450x300mm=47,7 l) / 24,092 l )Pictures:1. Bucket drum mass2. Volume of captured regolith 3. Opened carbon fiber bucket glued with aluminium bolts 4. Welded titanium bucket blades and ANTI JAMMING and SELF CLEANING rotating scoop wall 5. Upper view and bottom unloading, same just rotated 6. Side view that is connecting to tramission, separately for blades and bucket7. Iide section view while filling bucket8. Section view of one from 16 modified 623ZZ ball bearings