Robotics Education & Competition Foundation
Online Challenges

The Perfect Claw


Entry ID #: 4620
Created: Mon, Jan 8, 2018 1:40 PM

WHY WE CREATED THE PERFECT CLAW: With Autodesk Inventor 2016 we created the Perfect Claw to help teams who want to use claws this yaer. The goal of this part is to mkae it so teams can grab the cone with a claw that is perfectly shaped to the radius and angle, thus making cone collection easier. DESIGN DETAILS: This year we noticed 2 trains ofthought for intakes. Most teams use either a roller intake or a claw. The rollers for the most part will retain the cone without much trouble. The issue wit hte claw is that it is limited by its points of contact. Because of the conical shape there is no vex part that can hold it well. At best, team can use standoffs to grab at the gaps in the cone face. However, using standoffs cuases the cone orinetation to be varient when you pick it up and makes it difficult to score. A new sketch was created inside of an assembly file that we then used to get exact cone measurements from The body of the claw was lofted between the top and bottom "C" shape A mount was created by offseting a rectangle and extruding to the next surface The Perfect Claw attaches to where the grabbers of your claw would be. This allows you to make a claw as you normally would and just add the Perfect Claw to the end of it. There are 6 holes on the edges of the claw to allow for mounting if the team wants to add mesh The Perfect Claw has a thin profile to fit in between chainbars easily WHAT WE LEARNED: Through the creation of this part we learned how important the amount of contact on a surface is to maintain solid grip. If you have a few points of contact, then the obejct will rotate abou those points. Adding more points will make it more difficult to rotate, but if we have infinite points of contact, then the object will have no chance to rotate. We also learned that the thickness can be minimized by having the structure of the design have a curve and change the infill method to hexagonal.  FUTURE PLANS AND HOW 3D DESIGN HELPS: We plan on continuing to use Inventor to create custom parts that improve the quality of our build and allow us to approach designs more creatively. Knowing how to use Inventor will definitely help us in our career paths as simulation is used in almost every engineering field. We can apply our understanding of Inventor to help us use different simulation tools when we need to in our future careers. Also being able to know how mechanisms and individual parts function and what their limits are before creating them can save months of testing in the professional world. The knowledge of 3D design software definitely helps us develop as professionals and be prepared for our future careers.

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