GrabCAD 模型信息
Coqui-Bucket · 模型 158211
Literature from the current Rassor bucket demonstrate that its loading and unloading mechanism is effective for the robot purposes. That is why I decided to keep the basics of rotation for this new model, but to change the levels of inputs and the retaining mechanism. This model provides an internal mechanism that allows the input of regolith while loading by “opening a door”, which does not give any resistance in that direction. On the other hand, as soon as the scoop of is not engaged with the soil, this “door” is drawn to its original straight position: closing the entrance of the scoop and not letting the regolith escape. The “door” cannot open in the opposite direction. These doors are mounted in an internal shaft that is held by two one-way bearings installed in the principal Rassor’s shaft. When loading, the internal mechanism moves along with the bucket. While unloading, the one-way bearing leaves “floating” the internal mechanism and the doors are opened by the internal surfaces of the rotational bucket. This leaves the scoop’s openings clear for the regolith to come out. The model has two diameters: the greater diameter at the sides and the smaller at the center. The purpose is to limit the grouping of regolith in the same place. The side’s scoops provide and entrance for max 2.5 cm diameter rocks, while the center’s scoops provide entrance for 5 cm diameter rocks. With this said, the maximum diameter is of 450 mm, the bucket length is 310 mm, and the maximum volume capacity considering the internal mechanism is of approximately 27 liters. This leaves a fill ratio of approximately 65% for the minimum 17.5 liters. The materials used where Al 5086, Polyethylene, Acrylic, and Ti-6Al-4V for the Internal Mechanism, Doors, Bucket or Shell, and Blades, respectively. Adding all the masses gives a total of 5.5 kg. Close to the requirement, the overall weight can be decreased by changing some measurements of the Internal Mechanism. Nonetheless, the Bucket mass alone is of 2.6 kg. For the design, I used Siemens NX 12 and all the parts are original designs except for the one-way bearing which I obtained from McMaster Carr.
- 格式
- PTC Creo Elements、STEP / IGES、STL、Rendering、Other
- 分类
- Aerospace、Machine design、Robotics
- 标签
- nasadrumchallenge
- 数据更新
- 2026-10-18T18:50:29Z
