Bulldozer Specification: Difference between revisions
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*[[Cushion Valve]] on each wheel | *[[Cushion Valve]] on each wheel | ||
*[[15,000 inch pound hydraulic motor]] on each wheel | *[[15,000 inch pound hydraulic motor]] on each wheel | ||
**Each wheel has | **Each wheel has 6-fold gear reduction via [[Jackshaft]] | ||
**Jack shaft uses heavy chain and sprockets | **Jack shaft uses heavy chain and sprockets | ||
**Number of jackshafts is 3 for the gearbox; oil-enclosed gear box | **Number of jackshafts is 3 for the gearbox; oil-enclosed gear box | ||
| Line 19: | Line 19: | ||
*Complete materials cost estimate of under $16k in materials, not counting | *Complete materials cost estimate of under $16k in materials, not counting | ||
*20,000 pound gross vehicle weight, weighed down with modular concrete weights | *20,000 pound gross vehicle weight, weighed down with modular concrete weights | ||
* | *24,000 lb of pushing force | ||
=Challenges= | =Challenges= | ||
*Low cost ($20/linear foot for jackshaft [x3], sprocket for #100 chain - , chain - $6/foot or 9 feet total | *Low cost ($20/linear foot for jackshaft [x3], sprocket for #100 chain - , chain - $6/foot or 9 feet total | ||
Revision as of 20:45, 9 January 2012
- Use same frame as LifeTrac with modifications
- LifeTrac is 4"x4"x1/4" tubing, the bulldozer should be 4x4x1/2"
- Use 4 Power Cubes for 128 hp of tractor power
- Use 2 Power Cubes per side to simplify hydraulic plumbing requirements
- 3000 psi hydraulic system pressure
- Cushion Valve on each wheel
- 15,000 inch pound hydraulic motor on each wheel
- Each wheel has 6-fold gear reduction via Jackshaft
- Jack shaft uses heavy chain and sprockets
- Number of jackshafts is 3 for the gearbox; oil-enclosed gear box
- 30 gpm quick couplers on motors, valves, and cylinders
- Use metal wheels as in Traction Engines
- 30" diameter wheels, can be as wide as required to achieve desired traction
- Use 4-flange pillow block bearings with quick-disconnect wheels - see Quick Connect Wheels strategy for LifeTrac
- Use 3" shaft
- 3" bearings - https://www.surpluscenter.com/item.asp?item=1-215-48-4-C&catname=powerTrans
- 4 wheel drive
- Must use bolt-through wheel attachment to shaft as in LifeTrac, u
- Complete materials cost estimate of under $16k in materials, not counting
- 20,000 pound gross vehicle weight, weighed down with modular concrete weights
- 24,000 lb of pushing force
Challenges
- Low cost ($20/linear foot for jackshaft [x3], sprocket for #100 chain - , chain - $6/foot or 9 feet total
Deployment Suggestions
- 3 separate design challenge for:
- Main structure - frame, wheels, power cube mounts, hydraulic controls
- 6-way Blade and fabrication procedure for it, inlcuding fabrication procedure for 8' shop press using 5"x20"x2.5" Cylinders
- 5-fold Gear reduction mechanism via jackshaft and roller chain