OpenZ - 4WD - 4xAAA (based on TRQ1) (4WD4AAA_V2.3)

thingiverse

This is a 1/28 OpenZ R/C chassis. I recently broke my TRQ1 (mini-Q) chassis and decided to create my own design. It features four-wheel drive and is powered by four AAA batteries. I chose to keep all the functional components from the original TRQ1 and integrate them into a new 3D printed chassis. These components include transmission, differentials, servo, main board, motor, knuckles, axles, and bearings. The dimensions of this design are as follows: - Wheelbase: 93.75 mm - Chassis length: 116.5 mm - Width between wheels: 54.00 mm - Chassis width: 59.30 mm - Total width: 71.00 mm Initially, I identified several issues with the original TRQ1 chassis: - Poor weight distribution due to batteries and motor placement. - Cracking plastic when removing differential covers and electronics plates. - Fragile and clumsy design. - Lack of adjustability in various areas. - Limited steering angle. To address these problems, I've implemented the following changes: - Batteries are now placed underneath the chassis, positioned as low as possible. They can be accessed from the underside. - AAA plate contacts purchased on Amazon secure the batteries in place. - Plastic screws have been replaced with M2x16 countersunk screws and M2 nuts for added stability. The new design significantly improves stiffness and steering angle. Following extensive testing, I confirmed that weight distribution is now evenly balanced. The increased steering angle also enhances drifting performance. Please view my YouTube videos showcasing this prototype: https://www.youtube.com/watch?v=p_maU1PrFMQ https://www.youtube.com/watch?v=e4zUvdRYPdo&t=1s This 3D printed chassis was created without supports, using PLA with a layer thickness of 0.3 mm. Currently, the electronics are not fully integrated; they're placed over the chassis using hot glue and double-sided tape. The receiver and ESC are positioned in the same spot as on the original TRQ1, secured with hot glue. - The servo is mounted on the right side, oriented similarly to its placement on the TRQ1. It's held in place with double-sided tape. - The motor is situated at the back of the chassis between two plastic ridges. Additional layers can be added beneath the motor for optimal alignment. Future updates will include: - Creating brackets and mounting points for electronics - Adding adjustable motor placement for varying gear ratios - Incorporating camber and toe adjustments Please note that some images are from earlier prototype iterations. For those interested, I've shared a 1967 Ford Mustang shell design on Thingiverse: https://www.thingiverse.com/thing:4281093 I'll be sharing updates soon with an improved version of this chassis design.