GrabCAD 模型信息
PTD Actuator, Arduino driven · 模型 258091
Hello, I will try to make this description as short as possible, but please feel free to ask any questions you may have. When I saw what eNABLE does and started reading the problems eNABLE community members face when designing, printing and assembling the prosthetic hands in any variant, I was able to identify a couple of problems that were common to almost all cases, and I decided to start working on a way to try and solve those as better I could. So I first identified the scale/size problem; when a printed hand involves screws or bolts and other standard-sized hardware, it becomes very problematic to properly scale to a recipients custom size. Then it comes the mechanic part of it; all systems I have seen, use the force the recipient has in his/her forearm/wrist to open/close it. (V/O, V/C) This has a lot of disadvantages since every recipient is different and a design that may seem to work for some, may not for work for others, (different flexion and extension) and the strength exerted by it varies accordingly, but always inside certain values (never too strong) dictated by the forearm/wrist itself. We encounter limit in the 3dprinters, too, that cannot accurately print smaller features and also, the plastic itself reaches a limit in its mechanical properties as features get smaller. Also regarding scale/size, there´s the thing about trans radial amputation, where the above (wrist actuated) does not apply. Besides, the thing about the individual fingers controlled all at once seems very disadvantageous, since, in the most cases all fingers share a common pivot point, which in turn makes grasping non-cylindrical objects, very difficult, if not impossible. So I started working on these topics and designed this pieces I present you here. I designed an enclosure where the mechanical side of things happen, that doesn’t need scaling, and that can interact with any type of 3dprinted hand (PTC), eliminating the problems with varying hardware sizes. Also, I designed a pulley system that multiplies the work that the actuating servo can produce, along with a second pulley system that allows the fingers to move somewhat independently, giving them more freedom to grasp conical objects or other non-cylindrical ones. This enclosure can be axially (collinear) mounted on the recipient´s residual limb, if there´s enough room for it between the elbow and the wrist, or it can be mounted on the underside of the residual limb, via a couple adapters. (This part is still ...
- 格式
- Rendering、SOLIDWORKS、STL、Other
- 分类
- 3D printing、Medical、Robotics
- 标签
- ptd、myoware、enablemptd、enable、arduino
- 数据更新
- 2026-09-10T09:30:03Z