GrabCAD 模型信息
Nasa RASSOR bucket challenge entry · 模型 25613
• Dimensions o Drum length = 358.8mm (not including gearing) o Drum diameter = 450m • How it works (assembly shown "animation v2.avi" in files) o Each drum consists of 3 barrels each 120mm deep and with a ~120mm scoop biting into the regolith followed by a single curved wall to prevent material from falling out. The center of each of the barrels is a reservoir with a rotating hexagonal rod turning a paddle that lifts regolith higher into the bin with each scoop allowing a void to form that new regolith fills into. Without the paddle the friction in the barrel becomes to great for the friction of the loose regolith that the scoop is trying to fill the barrel with and the scoop becomes blocked pushing regolith out of the scoops path instead let it flow into the barrel. The central hexagonal axle is what the drum pivots on and what holds each drum to the arms, as well as what moves the paddles. While the drum rotates one direction the hexagonal axle rotates in the opposite direction through a series of 3 gears. The outside gear (diameter- wise) drives the rotation of the drum, the central gear is where a motor drives the entire system, the interior gear is what turns the hexagonal axle to drive the paddles. • Material --> using these material a full size prototype could be sub 5 kilograms o Aluminum The teeth on each drum, axle, paddle, gear, and where the axle interfaces with the barrel side walls would be made of aluminum. o Composite The sides of the drums would be made of a carbon fiber 6K harness satin weave to provide a smooth and durable surface. o Fasteners Assembly would be mostly completed with solid rivets to minimize weight and minimize the area for a rock to get stuck on. • Testing --> video shows test 3 o model built at 1/5 scale o Test 1 Collected 40.5 mL 49.7% of drum capacity o Test 2 Collected 41 mL 50.35% of drum capacity o Test 3 Collected 41.75 mL 51.27% of drum capacity o Results Tests averaged ...
- 格式
- STL、Other、Rendering
- 分类
- 3D printing、Machine design、Tools
- 标签
- nasadrumchallenge
- 数据更新
- 2026-07-10T10:44:23Z
