Robotics Education & Competition Foundation
Inspiring students, one robot at a time.

VEX Screw Joint by 8838D


Robohawks- Coach Lund
Entry ID #: 6470
Created: Tue, Jan 15, 2019 9:41 AM

Why did we create and model this part? We chose to model this part since screw joints are a very important aspect of robots.  Screw joints tend to be a leading factor in functioning lifts. They allow for various linkages and can be used to even replace axles in specific cases.  In the most common screw joints, spacers, a screw, and a lock nut are used. However, this method and variation of screw joint is not the most effective. The most effective variation uses a screw, a spacer, a kep nut, and a lock nut.  This method has less friction than the other variation. This variation relies on the fact that the joint pivots on the kep nut, which is metal on metal contact. To reduce friction and weight, a plastic counterpart which will most definitely solve issues of lifts and linkages having either too much friction or weight to function.  The top part spins and the inside is able to be screwed in, this allows it to not move freely thus making it more strong. What is the function of this part and how is it used? The function of this part is to create a sufficient substitute for axles and screw joints possible as of this time. It incorporates a spacer and a kepnut, to make assembly and usage easier. This will make screwing in screw joints a much smoother and shorter process, making building lifts a more convenient process. How did We Create the New Part? We used Inventor 2019 to create this part. We split the kepnut pack file to get the top part. We created a circle and extruded the circle to create the round piece.  What did we learn?  We learned that 3D design can help plan for the future of our robot. We can use this to further plan out designs and new integration of parts in our future plans.   

Links / Videos

Time-lapse of screw joint 3D printing.