Vex battery holder: "Zev Ties"

thingiverse

I created a battery holder that enhances battery attachment security and simplifies the process of replacing batteries. Its design functions similarly to a one-piece shaft collar; it encloses the battery securely with friction and causes no harm to its delicate casing. It employs a .25" standoff, anchored from both sides by screws, which acts as a pivot point. Make sure to fasten the screws simultaneously, ensuring that less strain is applied to the standoff holder part. On the opposite side lies a nut, retained firmly by friction, the lock washer, and the lower component. In standard use scenarios, this nut will remain stationary (although it can be removed with an Allen key or a similar tool). The screw threaded into this component relies on friction alone to stay in place when the battery holder is opened for access. It securely attaches to the robot's frame via two screws at the base, designed with countersinks so as not to obstruct the battery area. Through numerous iterations, I fine-tuned my design; these early models can be seen attached to the battery in various states. Printed on a Makerbot 2X using ABS plastic, this part requires roughly an hour for both halves (fifteen percent infill with two shells); ensure that you print one side flipped over and at a forty-five degree angle to allow the material flow properly. Refrain from tightening the main screw excessively, as excessive force could lead to cracks in the printed component. To achieve the ideal battery compression, adjust the 'space' parameter for both components; I discovered .035" strikes a balance, whereas more may increase the risk of plastic fracture while less might result in reduced stability. The thickness setting of .225" ensures proper material distribution across the battery's surface (managed through the 'thick' parameter).