Tractor Construction Set Design Guide: Difference between revisions
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=Details= | =Details= | ||
==Scalability== | |||
*Plates may be stacked | *Plates may be stacked | ||
*Tubes may be stacked | *Tubes may be stacked | ||
==Joints== | |||
*Rotating joints are a key motion feature | *Rotating joints are a key motion feature | ||
*Machines may be scaled from sub-ton to 50 ton weight | *Machines may be scaled from sub-ton to 50 ton weight | ||
==Structure: XYZ Construction== | |||
*Whenever building a device, make the frame structural by assuring that bolting is done along 3 axes at each corner. This allows the construction to be a space-frame construction with all corners having equivalent strength. | |||
==Modular Wheel Units== | |||
*Whenever attaching modular wheel units to frames, attach over 12" of space to prevent twisting of tubes under heavy loads. | |||
=Calculations= | =Calculations= | ||
*3" pivots can be designed for 150 tons of force at the pivot | *3" pivots can be designed for 150 tons of force at the pivot | ||
* | * | ||
Revision as of 01:23, 20 April 2013
Basic
- Use 4"x4" square tubing, 3/16" to 1/2" wall thickness
- CNC torch holes, typically 1"
- Plates are 1/2" thick
- Holes can serve as holes for pins or bolts
- Plates are in sizes that are multiples of 4"x4"
- For heavy duty joints, 3" pins are used
- 3" holes are reinforced with DOM Tubing for precision of fit
- Bolt-together XYZ corners are a basic design pattern
Details
Scalability
- Plates may be stacked
- Tubes may be stacked
Joints
- Rotating joints are a key motion feature
- Machines may be scaled from sub-ton to 50 ton weight
Structure: XYZ Construction
- Whenever building a device, make the frame structural by assuring that bolting is done along 3 axes at each corner. This allows the construction to be a space-frame construction with all corners having equivalent strength.
Modular Wheel Units
- Whenever attaching modular wheel units to frames, attach over 12" of space to prevent twisting of tubes under heavy loads.
Calculations
- 3" pivots can be designed for 150 tons of force at the pivot