LifeTrac Gear Module: Difference between revisions
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=Conceptual Design= | =Conceptual Design= | ||
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<img src="https://docs.google.com/drawings/pub?id=1XhdTKY080MNtr1ynnvtsgmK6KWn5irevW0txrjMDfZ8&w= | <img src="https://docs.google.com/drawings/pub?id=1XhdTKY080MNtr1ynnvtsgmK6KWn5irevW0txrjMDfZ8&w=720&h=500"> | ||
</html> | </html> | ||
[https://docs.google.com/drawings/d/1XhdTKY080MNtr1ynnvtsgmK6KWn5irevW0txrjMDfZ8/edit edit] | [https://docs.google.com/drawings/d/1XhdTKY080MNtr1ynnvtsgmK6KWn5irevW0txrjMDfZ8/edit edit] | ||
==Design Conditions of Satisfaction== | |||
*Uses exising [[Quick Connect Wheel]] rotor - its shaft output. | |||
*Geardown module is CNC cut from 1/2" steel sheet | |||
*Notches are made such that the structure can be assembled only one way | |||
*Mechanism for quick disassembly is included | |||
*Mechanism for tensioning the chain drive is included | |||
*Enclosure allows easy replacement of parts | |||
*Quick attachment of wheel onto the output shaft of geardown module is possible | |||
*Wheel is secured via a keyway | |||
*Input shaft is 1-7/8" thick, output shaft is 3" thick | |||
*Standard cold rolled shaft is used | |||
*Mechanism for retaining axial thrust is included | |||
*Geometry must line up for the connection to Quick Attach Wheel | |||
*Guards protect any exposed chains/sprockets for safety | |||
*Method of coupling to existing Quick Connect Wheel must be used - via chain drive - while considering geometry of frame a drive components | |||
*Quick Connect Wheel and Geardown units must be sufficiently stable to maintain chain tension. Tightening mechanism must lock in place. | |||
*Reference must be provided to verify existence of off-shelf parts | |||
*[[100 Pitch Chain]] must be used. | |||
*Concept must show approximate dimensions (+/- 2") of the geardown structure | |||
*Geardown unit must be no more than 250 lbs in weight | |||
=LifeTrac Existing Design= | |||
*LifeTrac - [[LifeTrac_III]] frame documentation | |||
*[[Quick Connect Wheels]] - shows dimensions | |||
=Sample Work Contract= | =Sample Work Contract= | ||
Latest revision as of 02:09, 15 March 2013
OSE Technology Pattern Language
White paper forthcoming.
Design Rationale
10 minute design rational for Gear Module, discussion with Rahul Dhinakaran
(needs transcription)
Conceptual Design
Design Conditions of Satisfaction
- Uses exising Quick Connect Wheel rotor - its shaft output.
- Geardown module is CNC cut from 1/2" steel sheet
- Notches are made such that the structure can be assembled only one way
- Mechanism for quick disassembly is included
- Mechanism for tensioning the chain drive is included
- Enclosure allows easy replacement of parts
- Quick attachment of wheel onto the output shaft of geardown module is possible
- Wheel is secured via a keyway
- Input shaft is 1-7/8" thick, output shaft is 3" thick
- Standard cold rolled shaft is used
- Mechanism for retaining axial thrust is included
- Geometry must line up for the connection to Quick Attach Wheel
- Guards protect any exposed chains/sprockets for safety
- Method of coupling to existing Quick Connect Wheel must be used - via chain drive - while considering geometry of frame a drive components
- Quick Connect Wheel and Geardown units must be sufficiently stable to maintain chain tension. Tightening mechanism must lock in place.
- Reference must be provided to verify existence of off-shelf parts
- 100 Pitch Chain must be used.
- Concept must show approximate dimensions (+/- 2") of the geardown structure
- Geardown unit must be no more than 250 lbs in weight
LifeTrac Existing Design
- LifeTrac - LifeTrac_III frame documentation
- Quick Connect Wheels - shows dimensions
Sample Work Contract