GrabCAD 模型信息
Regolith Excavator Bucket-Drum · 模型 16521
The design primarily focusses on having a reliable inner regolith deposition mechanism of high reliability to ensure maximum fill ratio. Please view the Youtube video for better understanding after going through the description (https://www.youtube.com/watch?v=UADDp8S8qq0). The drum core is single titanium cast body fitted with 15 titanium scoops welded onto it in 5 columns and 3 rows. Each row of scoops is 120 degrees apart from each other about the centre. Except for the middle column of scoops, two columns of scoops approach the regolith simultaneously to ensure symmetry of forces about the conventional Z-X plane or the sagittal plane. Thus there is an odd number of columns of scoops with middle column scoop being wider than the rest to ensure a similar amount of regolith excavated during each row of scooping while also not generating excess stress on a single scoop. The advantage of this type of symmetry in scoop arrangement ensures that the two regolith excavators need not be synchronised to ensure symmetry of forces at the two ends, something which is vital for achieving zero horizontal net reaction force. Middle Column Scoop Opening Width: 72.5 mm. Width of every Non-Middle Column Scoop Opening: 42.5 mm. Angular Span of each Scoop: 90 degrees. Height of each Scoop Opening: 50 cm. Fill Ratio: 70% Bucket Drum Mass: 4 Kg The excavator drum is mounted on a rigid cast Aluminium Shaft and the motion of the drum around the shaft is enabled by the use of 2 W61876 sealed bearings at the two ends of the drum secured by internal and external steps on the shaft and drum walls respectively. The drum walls are of aluminium and one of the walls is detachable for retrieving soil post collection. The rigid shaft has several sectored module 1 spur gear profiles centred about a near-vertical position (12 degrees anticlockwise with the vertical for anticlockwise excavator rotation). Each Scoop has an aluminium container below it welded to itself with an aluminium revolute door whose opening is controlled by a passive moderately stiff spring. The door is normally closed due to spring action and the door is embedded with a sectored spur gear profile of module 1. When the scoop approaches the ground soil enters and gets stored in the container below. The volume of the container is sufficient enough for each individual scoop of regolith. After collecting regolith when the scoop reaches the near-vertical position mentioned earlier the door gears are driven about the ...
- 格式
- STEP / IGES、STL、Fusion 360、Rendering、Other
- 分类
- Aerospace、Machine design、Robotics
- 标签
- nasadrumchallenge
- 数据更新
- 2026-07-11T00:07:35Z
