/RCRockCrawler

This is a remix of an original design from Thingiverse. The original design has been removed. So I add the oroginal parts ot the remix (https://www.thingiverse.com/thing:5236263). The main purpose of the remix was to modify the gearbox to be slower.

Primary LanguageHTML

RockCrawler

This is a remix version of an RC Rock Crawler that I found on Thingiverse. The original model got deleted since then. So I included the original here. The remix was first publish in Thingiverse at Remix Rc Rock Crawler, new gearbox. I modified the gearbox to make it slower, hence with more torque.

General instruction:

  1. Make sure the printer is well calibrated. Specifically the extruder. The extrusion factor, also know as the extrusion multiplier, will have a big impact on the way the pieces fits together. I personnaly use that guide before using a new filament: Extrusion Multiplier
  2. Print every pieces in PLA.
  3. Print the shock in PETG to get more flexibility.
  4. If you decide to print the tires print them in TPU, the softest one you can find. The grip is not very good with printed tires. For better grip you can buy the tires. In that case print the wheel part wheel_26_5mm.stl.
  5. If the screws tend to break the plastic part you can enlarge the hole with a drill bit.
  6. Use plenty of light grease in the gear box
  7. Use a bit of light grease in the wheel hub.
  8. If the center drive shaft keep falling off you can print this longer one: Center_Drive_Shaft_P2_15.55mm.stl.
  9. I provided a longer shock shock_46mm_stl. The short version tend to keep the car a bit low.

Video:

  1. In action
  2. Showing the shock
  3. Gearbox assembly

I found a link to the original video from the original designer:

  1. Make an RC Rock Crawler - Part 1
  2. Make an RC Rock Crawler - Part 2

Documentation generated by the OpenSCAD library NopSCADlib.

License: Creative Commons - Attribution - Share Alike.

Main Assembly

Table of Contents

  1. Parts list
  2. Wheel Left Assembly
  3. Wheel Right Assembly
  4. Drive Shaft Assembly
  5. Servo Control Link Assembly
  6. Hub R Assembly
  7. Hub L Assembly
  8. Axle Part1 1 R Assembly
  9. Axle Part1 1 L Assembly
  10. G34 Assembly
  11. Axle Part1 Assembly
  12. Axle Part2 Assembly
  13. Axle Part3 Assembly
  14. Axle Part4 Assembly
  15. Axle Part5 Assembly
  16. Axle Part6 Assembly
  17. Axle Part7 Assembly
  18. Axle Final Assembly
  19. GearBox Part1 Assembly
  20. GearBox Part2 Assembly
  21. GearBox Part3 Assembly
  22. GearBox Part4 Assembly
  23. GearBox Part5 Assembly
  24. GearBox Part6 Assembly
  25. GearBox Part7 Assembly
  26. GearBox Final Assembly
  27. Suspension Part1 Assembly
  28. Suspension Part2 Assembly
  29. Main Assembly

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Parts list

2 x Axle Final GearBox Final Main TOTALS
Vitamins
  8    .    .    8     Ball bearing MR128-2RS 8mm x 12mm x 3.5mm
  6    2    .    8     Ball bearing MR63ZZ 5mm x 8mm x 2.5mm
  16    4    .    20     Screw M2 pan self tap x 5mm
  18    8    4    30     Screw M2 pan self tap x 6mm
  4    .    4    8     Screw M2 pan self tap x 8mm
  14    12    .    26     Screw M2 pan self tap x 10mm
  10    4    .    14     Screw M2 pan self tap x 12mm
  .    1    .    1     Smooth rod 2mm x 10mm
  2    .    .    2     Threaded rod M2 x 10mm
  2    .    .    2    RC servo SG90
  .    1    .    1    motor 130, 6 volts
  80    32    8    120    Total vitamins count
3D printed parts
  2    .    .    2    5_5_ball_Closed.stl
  16    12    .    28    5_5_ball_Open.stl
  2    .    .    2    Axle_Case_p1.stl
  2    .    .    2    Axle_Case_p2.stl
  8    .    .    8    Axle_Case_p3.stl
  4    .    .    4    Axle_Case_p4.stl
  .    .    4    4    Ball_Link_29mm.stl
  .    .    4    4    Ball_Link_41mm.stl
  2    .    .    2    Ball_Link_62mm.stl
  2    2    .    4    Center_Drive_Cup.stl
  .    .    4    4    Center_Drive_Shaft_P1.stl
  .    .    2    2    Center_Drive_Shaft_P2.stl
  .    .    1    1    Center_Drive_Shaft_P2_15_5mm.stl
  4    .    .    4    Drive_Cup.stl
  4    .    .    4    Drive_Shaft.stl
  2    .    .    2    G34_P14_p1.stl
  2    .    .    2    G34_P14_p2.stl
  4    .    .    4    Hub.stl
  4    .    .    4    Link_Closed_35mm.stl
  .    1    .    1    Motor_Holder.stl
  2    .    .    2    P14_G34.stl
  4    .    .    4    Servo_Holder.stl
  2    .    .    2    Servo_Horn.stl
  .    .    4    4    Wheel.stl
  .    .    1    1    body_v3.stl
  .    1    .    1    firstStageGear.stl
  .    1    .    1    frameBack_v2_1.stl
  .    1    .    1    frameFront_v2_1.stl
  .    1    .    1    gearMotor.stl
  .    1    .    1    gearboxBack_v2.stl
  .    1    .    1    gearboxFront_v2.stl
  .    1    .    1    plate_long_v2.stl
  .    1    .    1    secondStageGear.stl
  .    .    4    4    shock_43mm.stl
  .    .    1    1    shock_46mm.stl
  .    .    4    4    tire_v3.stl
  .    .    1    1    wheel_26_5mm.stl
  66    23    30    119    Total 3D printed parts count

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2 x Wheel Left Assembly

3D Printed parts

2 x Wheel.stl 2 x tire_v3.stl
Wheel.stl tire_v3.stl

Assembly instructions

wheel_left_assembly

  1. Install the tire on the rim

wheel_left_assembled

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2 x Wheel Right Assembly

3D Printed parts

2 x Wheel.stl 2 x tire_v3.stl
Wheel.stl tire_v3.stl

Assembly instructions

wheel_right_assembly

  1. Install the tire on the rim the thread oriented the other way compare to the wheel_left_assembly.

wheel_right_assembled

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2 x Drive Shaft Assembly

3D Printed parts

4 x Center_Drive_Shaft_P1.stl 2 x Center_Drive_Shaft_P2.stl
Center_Drive_Shaft_P1.stl Center_Drive_Shaft_P2.stl

Assembly instructions

drive_shaft_assembly

  1. It is a good idea to print the Center_Drive_Shaft_P2 in TPU. It makes the assembly a bit easier
  2. Press fix both Center_Drive_Shaft_P1 into Center_Drive_Shaft_P2.

drive_shaft_assembled

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2 x Servo Control Link Assembly

Vitamins

Qty Description
2 Threaded rod M2 x 10mm

3D Printed parts

4 x Link_Closed_35mm.stl
Link_Closed_35mm.stl

Assembly instructions

Servo_control_link_assembly

  1. Screw both Link_Closed_35mm on a 10 mm M2 threaded rod. Leave a gap of about 1 or 2 mm in the middle.

Servo_control_link_assembled

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2 x Hub R Assembly

Vitamins

Qty Description
2 Ball bearing MR128-2RS 8mm x 12mm x 3.5mm
2 Ball bearing MR63ZZ 5mm x 8mm x 2.5mm
2 Screw M2 pan self tap x 10mm

3D Printed parts

2 x 5_5_ball_Open.stl 2 x Drive_Cup.stl 2 x Hub.stl
5_5_ball_Open.stl Drive_Cup.stl Hub.stl

Assembly instructions

Hub_R_assembly

  1. Install a 5_5_ball_Open with a M2 self tapping screw 10 mm.
  2. Install a bearing MR128 in the hub.
  3. Install a bearing MR63 in the hub.
  4. Install a Drive_Cup in the hub.

Hub_R_assembled

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2 x Hub L Assembly

Vitamins

Qty Description
2 Ball bearing MR128-2RS 8mm x 12mm x 3.5mm
2 Ball bearing MR63ZZ 5mm x 8mm x 2.5mm
2 Screw M2 pan self tap x 12mm

3D Printed parts

2 x 5_5_ball_Closed.stl 2 x 5_5_ball_Open.stl 2 x Drive_Cup.stl
5_5_ball_Closed.stl 5_5_ball_Open.stl Drive_Cup.stl
2 x Hub.stl
Hub.stl

Assembly instructions

Hub_L_assembly

  1. Crew together a 5_5_ball_Open and a 5_5_ball_Closed with a M2 self tapping screw 12 mm.
  2. Install a bearing MR128 in the Hub.
  3. Install a bearing MR63 in the Hub.
  4. Install a Drive_Cup in the Hub.

Hub_L_assembled

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2 x Axle Part1 1 R Assembly

Vitamins

Qty Description
2 Screw M2 pan self tap x 8mm

3D Printed parts

2 x 5_5_ball_Open.stl 2 x Servo_Holder.stl
5_5_ball_Open.stl Servo_Holder.stl

Assembly instructions

Axle_part1_1_R_assembly

  1. Install a 5_5_ball_Closed on right side of a Servo_Holder using a M2 self tapping screw 8 mm.

Axle_part1_1_R_assembled

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2 x Axle Part1 1 L Assembly

Vitamins

Qty Description
2 Screw M2 pan self tap x 8mm

3D Printed parts

2 x 5_5_ball_Open.stl 2 x Servo_Holder.stl
5_5_ball_Open.stl Servo_Holder.stl

Assembly instructions

Axle_part1_1_L_assembly

  1. Install a 5_5_ball_Closed on left side of a Servo_Holder using a M2 self tapping screw 8 mm.

Axle_part1_1_L_assembled

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2 x G34 Assembly

Vitamins

Qty Description
4 Ball bearing MR128-2RS 8mm x 12mm x 3.5mm
2 Screw M2 pan self tap x 6mm

3D Printed parts

2 x G34_P14_p1.stl 2 x G34_P14_p2.stl
G34_P14_p1.stl G34_P14_p2.stl

Assembly instructions

G34_assembly

  1. Insert G34_P14_p2 in G34_P14_p1 using a M2 self tapping screw 8 mm.
  2. Add the ball bearing MR128 at both ends.

G34_assembled

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4 x Axle Part1 Assembly

Vitamins

Qty Description
4 Screw M2 pan self tap x 10mm

3D Printed parts

4 x 5_5_ball_Open.stl 4 x Axle_Case_p4.stl
5_5_ball_Open.stl Axle_Case_p4.stl

Assembly instructions

Axle_part1_assembly

  1. Install a 5_5_ball_Closed on Axel_Case_p4 using a M2 self tapping screw 8 mm.

Axle_part1_assembled

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2 x Axle Part2 Assembly

Vitamins

Qty Description
8 Screw M2 pan self tap x 12mm

3D Printed parts

2 x Axle_Case_p1.stl
Axle_Case_p1.stl

Sub-assemblies

4 x Axle_part1_assembly
Axle_part1_assembled

Assembly instructions

Axle_part2_assembly

  1. Install both Axle_part1_assembly on the Axle_Case_p1 with 4 M2 self tapping screw 12 mm.

Axle_part2_assembled

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2 x Axle Part3 Assembly

Vitamins

Qty Description
2 Ball bearing MR63ZZ 5mm x 8mm x 2.5mm
8 Screw M2 pan self tap x 6mm

3D Printed parts

2 x Axle_Case_p2.stl 4 x Drive_Shaft.stl 2 x P14_G34.stl
Axle_Case_p2.stl Drive_Shaft.stl P14_G34.stl

Sub-assemblies

2 x Axle_part2_assembly 2 x G34_assembly
Axle_part2_assembled G34_assembled

Assembly instructions

Axle_part3_assembly

  1. Insert G34_assembly in the axle.
  2. Install ball bearing MR63 on P14_G34.
  3. Install P14_G34 in Axle_Case_p2.
  4. Fix Axle_Case_p2 on Axle_Case_p1 with 4 M2 self tapping screw 6 mm.
  5. Insert both Drive_Shaft in axle. Note: there is no ball bearing on the shaft.

Axle_part3_assembled

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2 x Axle Part4 Assembly

Vitamins

Qty Description
8 Screw M2 pan self tap x 10mm

3D Printed parts

4 x 5_5_ball_Open.stl
5_5_ball_Open.stl

Sub-assemblies

2 x Axle_part1_1_L_assembly 2 x Axle_part1_1_R_assembly 2 x Axle_part3_assembly
Axle_part1_1_L_assembled Axle_part1_1_R_assembled Axle_part3_assembled

Assembly instructions

Axle_part4_assembly

  1. Install two 5_5_ball_Closed on Axle_Case_p2 with M2 self tapping screw 10 mm.
  2. Install the servo holders (Axle_part1_1_L_assembly & Axle_part1_1_R_assembly) on Axle_Case_p2 with 2 M2 self tapping screw 10 mm.

Axle_part4_assembled

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2 x Axle Part5 Assembly

Vitamins

Qty Description
16 Screw M2 pan self tap x 5mm
2 Screw M2 pan self tap x 6mm

3D Printed parts

8 x Axle_Case_p3.stl 2 x Center_Drive_Cup.stl
Axle_Case_p3.stl Center_Drive_Cup.stl

Sub-assemblies

2 x Axle_part4_assembly 2 x Hub_L_assembly 2 x Hub_R_assembly
Axle_part4_assembled Hub_L_assembled Hub_R_assembled

Assembly instructions

Axle_part5_assembly

  1. Install the Center_Drive_Cup in the Axle with a M2 self tapping screw 8 mm.
  2. Install the Hub_L_assembly along with two Axle_Case_p3 with 4 M2 self tapping screw 5 mm
  3. Install the Hub_R_assembly along with two Axle_Case_p3 with 4 M2 self tapping screw 5 mm

Axle_part5_assembled

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2 x Axle Part6 Assembly

Vitamins

Qty Description
4 Screw M2 pan self tap x 6mm
2 RC servo SG90

Sub-assemblies

2 x Axle_part5_assembly
Axle_part5_assembled

Assembly instructions

Axle_part6_assembly

  1. Install the servo SG90 with 2 M2 self tapping screw 6 mm.

Axle_part6_assembled

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2 x Axle Part7 Assembly

Vitamins

Qty Description
2 Screw M2 pan self tap x 6mm

3D Printed parts

2 x Servo_Horn.stl
Servo_Horn.stl

Sub-assemblies

2 x Axle_part6_assembly
Axle_part6_assembled

Assembly instructions

Axle_part7_assembly

  1. Install the servo horn using the screw that came with the servo.

Axle_part7_assembled

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2 x Axle Final Assembly

3D Printed parts

2 x Ball_Link_62mm.stl
Ball_Link_62mm.stl

Sub-assemblies

2 x Axle_part7_assembly 2 x Servo_control_link_assembly
Axle_part7_assembled Servo_control_link_assembled

Assembly instructions

Axle_final_assembly

  1. Install a Servo_control_link_assembly from the servo horn to left hub.
  2. Install a Ball_Link_62mm between the two hubs.

Axle_final_assembled

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GearBox Part1 Assembly

Vitamins

Qty Description
1 Ball bearing MR63ZZ 5mm x 8mm x 2.5mm
4 Screw M2 pan self tap x 5mm

3D Printed parts

1 x frameFront_v2_1.stl 1 x gearboxFront_v2.stl
frameFront_v2_1.stl gearboxFront_v2.stl

Assembly instructions

gearBox_part1_assembly

  1. step 1

gearBox_part1_assembled

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GearBox Part2 Assembly

Vitamins

Qty Description
1 Smooth rod 2mm x 10mm

3D Printed parts

1 x firstStageGear.stl 1 x secondStageGear.stl
firstStageGear.stl secondStageGear.stl

Sub-assemblies

1 x gearBox_part1_assembly
gearBox_part1_assembled

Assembly instructions

gearBox_part2_assembly

  1. Make sure the whole in firstStageGear is 2 mm using a 2 mm drill.
  2. Make sure the whole in frameFront_v2_1 is 2mm using a 2 mm drill. Do not go through the case.
  3. Put some grease on both side ot firstStageGear.
  4. Insert the 2 mm rod in the firstStageGear. Then insert in the frameFront_v2_1. Make sure it turns freely.
  5. Put some grease on both side ot secondStageGear.
  6. Insert secondStageGear on top of firstStageGear.

gearBox_part2_assembled

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GearBox Part3 Assembly

Vitamins

Qty Description
2 Screw M2 pan self tap x 6mm
1 motor 130, 6 volts

3D Printed parts

1 x Motor_Holder.stl 1 x gearMotor.stl
Motor_Holder.stl gearMotor.stl

Sub-assemblies

1 x gearBox_part2_assembly
gearBox_part2_assembled

Assembly instructions

gearBox_part3_assembly

  1. If your motor didn't come with a 8 thooht then insert the gearMotor onto the motor
  2. Insert the motor. Make sure the gear are turning fine.
  3. Install the Motor_Holder with 2 M2 self tapping screw 6 or 8 mm.

gearBox_part3_assembled

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GearBox Part4 Assembly

Vitamins

Qty Description
1 Ball bearing MR63ZZ 5mm x 8mm x 2.5mm

3D Printed parts

1 x gearboxBack_v2.stl
gearboxBack_v2.stl

Sub-assemblies

1 x gearBox_part3_assembly
gearBox_part3_assembled

Assembly instructions

gearBox_part4_assembly

gearBox_part4_assembled

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GearBox Part5 Assembly

Vitamins

Qty Description
2 Screw M2 pan self tap x 6mm

3D Printed parts

2 x Center_Drive_Cup.stl
Center_Drive_Cup.stl

Sub-assemblies

1 x gearBox_part4_assembly
gearBox_part4_assembled

Assembly instructions

gearBox_part5_assembly

  1. Insert both Center_Drive_Cup with 2 M2 self tapping screw 6 mm.

gearBox_part5_assembled

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GearBox Part6 Assembly

Vitamins

Qty Description
4 Screw M2 pan self tap x 12mm

3D Printed parts

1 x frameBack_v2_1.stl
frameBack_v2_1.stl

Sub-assemblies

1 x gearBox_part5_assembly
gearBox_part5_assembled

Assembly instructions

gearBox_part6_assembly

1.Install the frameBack_v2_1 with 4 M2 self tapping screw 12 mm.

gearBox_part6_assembled

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GearBox Part7 Assembly

Vitamins

Qty Description
4 Screw M2 pan self tap x 6mm

3D Printed parts

1 x plate_long_v2.stl
plate_long_v2.stl

Sub-assemblies

1 x gearBox_part6_assembly
gearBox_part6_assembled

Assembly instructions

gearBox_part7_assembly

1.Install the frameBack_v2_1 with 4 M2 self tapping screw 12 mm.

gearBox_part7_assembled

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GearBox Final Assembly

Vitamins

Qty Description
12 Screw M2 pan self tap x 10mm

3D Printed parts

12 x 5_5_ball_Open.stl
5_5_ball_Open.stl

Sub-assemblies

1 x gearBox_part7_assembly
gearBox_part7_assembled

Assembly instructions

gearBox_final_assembly

gearBox_final_assembled

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Suspension Part1 Assembly

3D Printed parts

4 x Ball_Link_29mm.stl 4 x Ball_Link_41mm.stl
Ball_Link_29mm.stl Ball_Link_41mm.stl

Sub-assemblies

2 x Axle_final_assembly 2 x drive_shaft_assembly 1 x gearBox_final_assembly
Axle_final_assembled drive_shaft_assembled gearBox_final_assembled

Assembly instructions

suspension_part1_assembly

  1. Proceed with one end at a time.
  2. Install the 2 Ball_Link_41mm
  3. Install the drive_shaft_assembly
  4. Install the 2 Ball_Link_29mm
  5. Proceed with the other end.

suspension_part1_assembled

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Suspension Part2 Assembly

3D Printed parts

4 x shock_43mm.stl
shock_43mm.stl

Sub-assemblies

1 x suspension_part1_assembly
suspension_part1_assembled

Assembly instructions

suspension_part2_assembly

  1. Install the shock. Pay attention to the opening at the ball joint: they should be facing up. This will make the shock bending downward when compressed.

suspension_part2_assembled

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Main Assembly

Vitamins

Qty Description
4 Screw M2 pan self tap x 6mm
4 Screw M2 pan self tap x 8mm

3D Printed parts

1 x Center_Drive_Shaft_P2_15_5mm.stl 1 x body_v3.stl 1 x shock_46mm.stl
Center_Drive_Shaft_P2_15_5mm.stl body_v3.stl shock_46mm.stl
1 x wheel_26_5mm.stl
wheel_26_5mm.stl

Sub-assemblies

1 x suspension_part2_assembly 2 x wheel_left_assembly 2 x wheel_right_assembly
suspension_part2_assembled wheel_left_assembled wheel_right_assembled

Assembly instructions

main_assembly

  1. Install the 4 wheel with M2 self tapping screw 8 mm.
  2. Install the body with 4 M2 self tapping screw 5 mm.

main_assembled

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