Build your Own Rhinoceros Beetle Robot
Kabuto Mushi Electronics ProjectsBy Bradley Eckert
Description: Rhinoceros Beetle Robot
Assembly Time: 2-4 hours
Skill level: Beginner-Intermediate
The Rhinoceros Beetle, know in Japan as Kabuto-Mushi, has a wireless remote control that allows you to move forward and back, turn the robot, open and close the claw, and lift the claw up and down. When I saw it I couldn't help but want to build it!
Depending on how fast you move and follow the instructions, this kit could take between two and four hours to build. I had a lot of fun building this robot. Trust me, in the end they are hours well spent.
Just a heads up, fitting all the parts together can be tricky. Go slowly and follow the directions carefully.
What you will need:
Kabuto-Mushi Robot: Rhinoceros Beetle OWIKIT
Long Nose Pliers
Small Philips Head Screwdriver
3 AAA Batteries
4 AA Batteries
Step 1 - Checking the parts and toolsWhen starting a project always make sure that your kit has all the packaged parts. Also make sure that you have all the tools necessary to build the kit.
Step 2 - Assembling the gearboxThere are two identical gearbox/motor assemblies, complete the same process for both.
A. Locate the two small plastic bags labeled "C", and the bags labeled "B", "D", and "A". Remove a motor from bag B and the Motor mounting plate (A-25) from bag A in the position marked 25.
B. Push motor through the Motor Mounting Plate until it is snug.
Motor with motor mounting plate
C. In bag C, locate the speed-shift lever and the flat spur gear w/ boss and attach as shown. Locate the wheel shafts w/ E-rings in both bag Dss and put them in the speed-shift lever and flat spur gear with boss part just made and place one with the e-ring on top and the other with it on bottom, for left and right axles.
D. Remove piece A-23 from the A set, 2 long pins (bag D), a crown gear with pinion (bag C, white colored), and a flat spur gear A with pinion (bag C, black colored) and insert pins as shown.
E. Grease up black gear with the white tube of grease included and lower onto the pin as shown, then do the same on the other pin for the white gear.
F. Remove the bushing from bag D and apply as shown.
G. Remove two more long pins from bag D and apply as shown above. Take out six flat spur gears B with pinion from bag C and grease each one then attach as shown. Apply the first gear on the pin closest to the black gear then alternate for the rest.
H. Remove A-26, the change speed lever plate from the A set. Insert the previously assembled speed shift levers with wheel shafts, the change speed lever, and push the bottom through the bottom bushing, for both the left and right wheel, the gear will be on the bottom and the change speed lever will be above as shown, note that the e-ring will be on top for right wheel and under for left.
I. Remove A-24 from the A-set and apply another bushing. Attach change speed lever plate as shown.
J. Attach the top of the gearbox, A-24. Make sure all pins line up and press down firmly to secure. Get out two M3X25 screws from bag D and two M3 nuts from bag D and push the screws through the top as shown. Secure with nuts at bottom. Set the speed change lever in each of the three positions and test if the gears spin smoothly, if they do, remove the two screws and nut.
K. Repeat steps for the left motor, paying careful attention to the direction of the axle. Line up both motors as shown and insert into position by opening the gear box then closing it on the motor. After in place as shown, reattach the screws and nuts.
Step 3 - Assembling the rear wheelsA. Remove wheel metal insert with attached M3 metal screw from bag I (inside bag L), remove the screw from insert. Remove wheel, D-37 and cut off the rod sticking out at the top of the wheel. Place metal wheel insert in the wheel as shown, making sure the screw hole lines up with the plastic opening.
B. Snap the rear wheel cover, D-38, and the rear wheel together. Repeat steps for other wheel.
Step 4 - Installing the rear wheelsLine up rear wheel with motor boxes and attach wheels by pushing them on the axles then screwing in the M3.
Step 5 - Assembling the front wheelsA. Remove D-31 and D-30 from the D set. Trim the rod from D-30, then press them firmly together until they snap.
B. Remove one of the smaller screws from bag I and remove the nut from it, drop the nut into position. Also remove a shaft with e-ring from bag I, two brushings, and D-32 (comes separately from the D-set but in the same bag). Now put the axle, after greasing it, through using the brushings and D-32 then tighten the screw. Repeat steps for opposite wheel.
Repeat steps for the other small wheels from set D, except replace the D-32 with D-36. Note: make sure the longer side of the D-36 is facing away from the wheel. You should now have four wheels.
Step 6 - Attaching the wheels and gearboxesA. Remove the lower half of the main cabinet from bag Q and line up the wheels and attach.
B. Line up the motors and gearboxes.
C. Remove eight of the smaller screws from bag T (located inside of bag Q). Underneath the lower half of the main cabinet you will see holes marked "G" for the screws as shown, insert screws.
Step 7 - Attach the caterpillars
In bag U, remove the two caterpillar belts and attach as shown.
Robot with the caterpillar belts attached
Step 8 - Assemble the catch handA. In bag E, remove the body set bottom (B-11), the two hands, and in bag U, remove the two small arm clamp rubber pieces. Attach the two arms with the gear facing down as shown. Attach the rubber pieces as shown. They are side specific so if they do not sit flush, switch which side they are on.
B. Remove four pins from bag H and insert as shown. (inside bag G inside bag F)
C. In bag K, there are two damping gears, put the smallest one on then the bigger one on the pin shown after greasing.
D. In bag K, remove a flat spur gear and grease, then attach as shown on pin 2 away from first gears. (farther away one in picture)
E. In bag J remove the smaller flat spur gear, grease, and attach to the middle pin as shown above.
F. In bag K, remove three more flat spur gears, grease, and first place one on the far pin with nothing on it, then the closest pin to that, then back to the other one as shown.
G. Remove a spring from bag H and place on top of the first two gears you put on, the damping gears as shown.
H. Remove the motor with the corkscrew head from bag G, grease the head, and place in as shown.
I. Attach the motor cover, B-12 to the top and attach it with the thicker tapping screws from bag H as shown.
J. Place the cover (B-10) over the bottom and secure using two M3X25 screws (bag H) with nuts and one M3X8 (Bag H) screw (the two medium length ones and a short one) with nut for the back as shown.
Step 9 - Assemble the catch hand backingIn bag F, remove body set C (C-18) and remove 3 long pins from bag H and place as shown.
Then place the spring from bag H on the pin closest to the missing wall, bottom pin in the picture above.
Get the two damping gears from bag J, and grease, and place on the spring with the bigger one on the bottom (differs from picture).
Next get six flat spur gears from bag J, grease, then place them alternating on the two pins that have nothing on them starting with the one in the top right in the picture above.
Attach the cover (C-17) using tapping screw M2X8 from bag H as shown.
Insert motor into slot. Get body set C (C-16) and install the motor box as shown.
Install the catch hand as shown.
Install the top of the body (C-15) using M3 nut and M3X10 screws from bag I or bag H. Note: make sure all 4 wires are fed through the hole in the back.
Step 10 - Install the catch hand and backingPut the backing in place as shown and then use three M3X35 screws with M3 nuts in the holes shown to secure it.
Step 11 - Install the PCBOpen the battery compartment through the bottom and feed the wires out the hole on the top.
Get the PCB from bag V and install where shown.
Secure it using 4 of the smaller screws from bag T.
Plug in all the cords using this diagram.
Step 12 - Install Component CoversA. Remove the select switch plastic cover from bag S (it is the tiny piece).
B. Remove the cover from bag R (inside bag Q) and position as shown in the top cabinet from bag Q. Screw it in using the small screws from bag T.
C. Get the caterpillar cover pieces out of bag S and place as shown on the main cabinet top.
D. Place in position and use the remaining screws from bag T to secure it using the holes marked T on the underside.
Step 13 - Assembling the controllerA. Get the controller out of bag M, we are using the top half first. In bag N, remove all the pieces and install as shown.
B. Remove PCB from bag W and snap into two pieces on perforated line. Put in place as shown then secure the smaller piece with 3 M2.6X4 screws from bag P and the bigger piece with 4 M2.6X6 screws from bag P.
C. Get the front cover from bag O and connect the lead wires of the battery pack to the terminals on the flat behind the LEDs as shown.
Battery hooked up
Plastic front cover in place
D. Insert plastic front cover for the controller as shown.
E. Attach the back of the controller using M2.6X8 screws from bag P.
You should now have a fully assembled Kabuto-Mushi Bot - congratulations!
Check out this video below of the Kabuto-Mushi in action.
Brad Eckert grew up in the Bay Area and now attends MIT. He wants to become an engineer and loves to make things and play with robotics.
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