Robotics Education & Competition Foundation
Online Challenges

Multi Purpose Wheel Design

2

megh007
Entry ID #: 5890
Created: Sat, Jan 12, 2019 4:34 AM


First of all special thanks to my brother  to design support and hardware for this challenge. Why this Design?     I found an alignment error in  recent robots in university challenges. after some mechanical research I found that the accuracy comes with higher accurate manufacturing.     Presently, in VEX ROBOTICS normaly weight of robots is between 5 to 35 kgs.  Why you created the part?     Because , i found an alignment error in  recent robots in university challenges like ROBOCON 2017-18.After some mechanical research i found that the accuracy comes with higher accurate manufacturing. so , we start research on "how to design wheel for accurate liner and circular positioning".           2. what functionality are you improved? Accurate alignment higher ground clearance. Higher gear ratio Lower manufacturing cost Easy to assemble Lower weight 3d printed parts  No machining errors No bearing & shafts required. In my wheel , we need only 3d printer access to print and assemble it can be helpful in emergency condition if you don'thave spare wheels than print it.(pretty easy).       3. Issue solving.        Line follower and other path following task done by robots, programme is correct the errors of linear misalignments.In my wheel deisgn dont need to use encoder to feedback from motor for proper positioning.i also used  warm gear for speed reduction(30:1) which increase the accuracy. Simple wheel with shafts is needed to manufacture bearing hub and shafts ,it is costly and contain tolerance. 3d printing is more beneficial than other manufacuring on machine.        4. use of new part. This wheel is used in all major robots which can move to complete tasks. Also you can see the use of wheel in different type of assembly .      This wheel is also use for other application like, fresbee disk throwing mechanism, tenis ball throwing mechanism etc.        5. Explain how you use fusion 360 for create part. Firstly we research on different mechanism for accurate positioning. Secondly we draw some 2d sketches with some dimensions and calculate gear ratios and gear PCD.Finally it gives output 80:1 . Then we start on fusion360 (student version 2.0.4801) for 3d designing. We make gears with help of adds in option.than design individual sidepanal , warm , outer gear . We downoad  motor from fusion gallery for our reference dimentions. *Please note that .f3d file contain only part and .f3z file contain assembly. for 3d printing see attached .stl files.Becaus of  no uploading 20 mb fusion file i will share linkof my original model in link section.(any one can run in fusion and make .STL /Directly print it).    

Links / Videos

1. why you created the part? because , i found an alignment error in recent robots in university challenges like ROBOCON 2017-18. After some mechanical research i found that the accuracy comes with higher accurate manufacturing. So , we start research on "how to design wheel for accurate liner and circular positioning".

Because i am not able to upload 12 mb file in file section i will share my project file link for view and analyse purpose.(also downloadable)

Comments

   megh007 on 01/25/2019

Thank you for support.@maharshi,@sunny. this wheel is simply flexible and very useful when we require accuracy in angular as well as linear dimensions.