Tractor Construction Set 2018

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This is the master page of all tractor development for 2018

See github page at https://github.com/skikro/microtrac for quick part download and latest versions


Basics

  • A set of hydraulically driven, versatile tractors:
    • MicroTrac, a walk-behind tractor
    • LifeTrac, a larger riding tractor
  • Easily configurable
  • Straightforward to maintain
  • Cost effective to build using the OSE Microfactory or a set of basic tools



HintLightbulb.png Hint: The previous version can be found at Tractor Construction Set 2017


Development Template (Needs update)

(edit link below links to the correct spreadsheet, but the iframe is linked to the previous version)
(burndown chart is not correct)

edit

Task Allocation (Needs update)



Workshop Preparation (tentatively set for August)

  • CAD update (link to pictures here:
  1. Update the frame
  2. Loader Arm Geometry
  3. Update the tensioner and 6 tooth sprocket
  4. Update the motor assembly and its mounting
  5. Update loader arm pivot
  6. New mount of the curl cylinder on the bucket
  7. Update lower arm cylinder mount
  8. Update bucket.
  9. Add operator platform
  • Detailed Build Instructions:
  1. Fab drawings
  2. Step-by-step instructionals
  3. CNC cut files
  4. Any necessary jigs or templates
  • Microtrac Design Guide

This iframe and build instruction doc needs update

edit

MicroTrac v18.10 Concept (Needs update)

41" wide

edit



Master Checklist(Needs update)

edit




Part Library (Needs update)

HintLightbulb.png Hint: See OSE Part Library for the tractor parts, which should be moved here and a link to the MicroTrac Part Library should be added at OSE Part Library.


Summary

Admissible Parts

Motor

  1. Motor - File:MT 45cuinmotor.fcstd - 45.6 Cu In Motor
  2. Motor mounting bolts - 1/2" x 1.75", 4 of them on front face of motor
  3. Motor Mounting lock washers - 1/2"
  4. Motor Mounting nuts - regular 1/2" hex nuts
  5. Motor Castille Nut - nut on tapered shaft of motor - [1]
  6. Motor Castille Nut Pin - pin that prevents castille nut from coming off
  7. Hub - node
  8. Hub Bolts - 5-bolt circle
  9. Motor Mount Plate - File:MT motormountplate.fcstd
  10. Motor Mount Plate Bolts - 1" bolts, 6" long - File:MT motor mount plate bolt.fcstd
  11. Motor Mount Plate Washers - 1" lock washer
  12. Motor Mount Plate Nuts - 1" nuts
  13. Motor Fittings - 1/2" BSP-M to 3/4" quick coupler
  14. Drive Sprocket. See clamp sprocket for reference - [2]
  15. PTO Motor File:PTO Hydraulic Motor.fcstd
  16. PTO Motor Mount PlateFile:PTO Motor Mount plate.fcstd

Tracks

Tracks File:MT track1.fcstd Track construction set - File:Track CS.fcstd

  1. Track pin
  2. Track pin cotter pin
  3. Track pad
  4. Track sides
  5. Track roller

Idler

  1. 8" pipe - [3]
  2. 12" pipe - done
  3. Flange
  4. 3" bearing
  5. 1-7/8" bearing
  6. 3" shaft
  7. 1-7/8" shaft
  8. 3" shaft collar
  9. 1-7/8" shaft collar

Track Tensioner

Frame

  1. Narrow Frame File:Frame.fcstd
  2. Wide Frame
  3. Loader arm bushing File:Loader arm bushing.fcstd
  4. Shaft for Loader Arms File:Shaft Loader Arms.fcstd

Clamps

  1. See Pipe and Couplers.
  2. 1 Bolt Clamp File:Idler Clamp 1 Bolt.fcstd
  3. 2 Bolt Clamp File:Idler Clamp 2 Bolt.fcstd
  4. 3 Bolt Clamp File:Idler Clamp 3 Bolt.fcstd

Hydraulics Part Library

  1. 45 GPM single spool motor valve
  2. 25 GPM double spool motor valve
  3. 1" NPT nip
  4. 3/4" NPT nip
  5. 1/2" NPT nip
  6. 1" NPT elbow
  7. 3/4" NPT elbow
  8. 1/2" NPT swiwel
  9. BSP female fitting, 1/2"
  10. BSP female fitting, 1/4"
  11. 1" NPT swivel
  12. 3/4" NPT sivel
  13. 1/2" NPT svivel
  14. 1" NPT tee
  15. 3/4" NPT tee
  16. 1/2" NPT tee
  17. 3/4" to 1/4" NPT reducer bushing
  18. 3/4" to 1/2" NPT reducer bushing
  19. 1/2" quick coupler male
  20. 1/2" quick coupler female
  21. 3/4" (28 gpm) ISO 7241-1 A quick coupler male
  22. 3/4" (28 gpm) ISO 7241-1 A quick coupler female
  23. 1/2" hydraulic check valve, 3000 PSI

Quick Attach System

File:MT-QA geometry.fcstd

File:Bobcat QA v3.fcstd

Attachments

File:MT Bucket.fcstd

File:MT Bucket+teeth.fcstd

File:Tooth Bar.fcstd

Modules

Presentations (Needs update)

Modules (Needs update)

  • GPS + Computer Vision - using standard phone gps, the tractor has a GPS unit to which the Feed Me App connects. Computer Vision helps guide the tractor.
  • Feed Me App - remote control smart phone app app combining GPS with computer vision to allow direct smart phone control,preprogrammed control, and computer vision assist which prevents the tractor from bumping into things
  • Control solenoids - connected to Arduino - these allow for automated motion of the tractor
  • Hydraulic control module - the hydraulic valves and circuit for running the tractor
  • Solar power cube - a small power cube that can run from a single power cube.
  • Power cube - the 16 hp base that is scalable and practical up to 160 hp
  • Hydraulic Reservoir module - it is the reservoir to which one can connect any number of power cubes
  • Cooler module - hydraulic fluid cooling system to itch can be attached any number of power cubes for cooling
  • Gasifier module - a gasifier burner that works with charcoal for providing fuel to the power Cube



See Also

Useful Links

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