LifeTrac GrabCAD Challenge: Difference between revisions

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'''See challenge at GrabCAD - http://grabcad.com/challenges/open-source-tractor-lifetrac-6-challenge'''
'''Abstract on Design Goal:''' The following materials exhibit the current state of LifeTrac - Open Source Ecology's open source tractor. The goal is to take this design from a ''Mad Max ghetto rider'' to a quality, high performance tractor with articulated steering. The articulated steering is used to reduce wheel loads compared to skid-steering configuration - thereby simplifying the design of the wheel units drastically. We are currently designing the tractor for use with 1 or 2 Power Cubes - our 27 hp hydraulic power units. The goal of this challenge is to improve on this design based on past builds. See the results of [[LifeTrac 5]] - and the numerous comments there on design issues in the videos. All details of this 'lifesize erector set' design are to be evolved until we have a satisfactory tractor. By helping this project, you are helping to develop a 'peoples' tractor' that can be built from stock parts - and that can be maintained easily by the user for a lifetime of service.
See intro video on the LifeTrac history -
See intro video on the LifeTrac history -


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=Last Model - LifeTrac 5=
This tractor has been deployed for testing at the [[Our School at Blair Grocery]] urban gardening project in New Orleans.
[[Image:Liftrac5.jpg|500px]]
See [[LifeTrac 5]]
=Existing Model of LifeTrac 6 - in Development=
This one has one power cube. Loader cylinders need to be added.
[[Image:LifeTrac6.jpg|400px]]
'''Download Sketchup file (18MB): [[File:LifeTrac6.skp]]'''
If you don't already have '''Google Sketchup''' downloaded, get it [http://www.sketchup.com/ '''Here'''].
=Universal Constructor Set Pieces=
[[Image:Warehouse_snip_v3.PNG|400px]]
For the final product to be modular and easy to assemble, the parts you use in the frame must come from the [http://opensourceecology.org/wiki/Warehouse Warehouse]
[[File:warehouse.skp]]
=General Requirements=
<html><img src="https://docs.google.com/drawings/d/1LzH2M9Sg1zQhQoftbag-N3X5f_lgy6_LFiCtOLpJZ_Q/pub?w=1000&amp;h=1000"></html>
<html><img src="https://docs.google.com/drawings/d/1LzH2M9Sg1zQhQoftbag-N3X5f_lgy6_LFiCtOLpJZ_Q/pub?w=1000&amp;h=1000"></html>


[https://docs.google.com/drawings/d/1LzH2M9Sg1zQhQoftbag-N3X5f_lgy6_LFiCtOLpJZ_Q/edit edit]
[https://docs.google.com/drawings/d/1LzH2M9Sg1zQhQoftbag-N3X5f_lgy6_LFiCtOLpJZ_Q/edit edit]
=Cab Module Requirements=
<html><img src="https://docs.google.com/drawings/d/10bgcLamwvOVz_61bTilgq2rKr86Ni-CCbG5oikMICTw/pub?w=1000&amp;h=700"></html>
[https://docs.google.com/a/opensourceecology.org/drawings/d/10bgcLamwvOVz_61bTilgq2rKr86Ni-CCbG5oikMICTw/edit Click edit to access links in the drawing.]
The hydraulic connections to and from the cab are all organized on a single panel: see [[Hydraulic Panel]] concept.
[http://opensourceecology.org/wiki/LifeTrac_6_Modules#Cab_Design_Requirements Link to Modules Page]
=Loader Arm Requirements=
<html><img src="https://docs.google.com/drawings/d/1xDxpeZIsfRx-634vUNjc9_OPSysIHzOkOe09usFEXgY/pub?w=1000&amp;h=1000"></html>
[https://docs.google.com/a/opensourceecology.org/drawings/d/1xDxpeZIsfRx-634vUNjc9_OPSysIHzOkOe09usFEXgY/edit Edit This Drawing]
=Power Cube Module=
<html><img src="https://docs.google.com/drawings/d/1TCfqCAdD-HY_d_eLz_lOVK38qaG-osYK9UQRf1aXmK8/pub?w=800&amp;h=800"></html>
[https://docs.google.com/drawings/d/1TCfqCAdD-HY_d_eLz_lOVK38qaG-osYK9UQRf1aXmK8/edit Edit This Drawing ^^]
[[File:LifeTrac6_PowerCube.skp]]
=Quick Attach Module=
We are using the [[Bobcat Standard Quick Attach]] module:
[[File:QuickAttach.jpg Quick Attach|400px]]
[[File:Quick Attach.skp]]
[http://opensourceecology.org/wiki/Bobcat_Standard_Quick_Attach_for_LifeTrac Bobcat_Standard_Quick_Attach_for_LifeTrac]
=Modular Wheel Units=
These wheels mount on the frame tubing as quick-connect modules for the tractor:
[[File:Wheel Mount.jpg Wheel Mount|400px]]
[[File:Wheel Mount.skp]]
This is a detail of the wheel module frame:
[[File:Wheelmount - edited 6-9-13.jpg|300px]]
[http://opensourceecology.org/wiki/Quick_Attach_Wheel_Module Quick_Attach_Wheel_Module]
[http://opensourceecology.org/wiki/Modular_Wheel_Units Modular Wheel Units]
=Rear Wheel Base=
This is the current design of the entire rear wheel base.
<html><img src="https://docs.google.com/drawings/d/1N3IRSpQp3j6BAzcifmQvn8VDQC8dyFpVOwbNhDlSD8I/pub?w=800&amp;h=400"></html>
[https://docs.google.com/drawings/d/1N3IRSpQp3j6BAzcifmQvn8VDQC8dyFpVOwbNhDlSD8I/edit Edit This Drawing]
[[File:Rear_Wheelbase.skp]]
=Steering Pivot=
This is a detail of the suggested pivot that joins the front and rear sections of the tractor.
<html><img src="https://docs.google.com/drawings/d/1RMj9adA4jKuY80O6YIN5AZjS6pnx1ZCNVRQ2LFUVzi8/pub?w=960&amp;h=720"></html>
[https://docs.google.com/drawings/d/1RMj9adA4jKuY80O6YIN5AZjS6pnx1ZCNVRQ2LFUVzi8/edit Edit This Drawing ^^]
[[File:SteeringPivot.skp]]


=General Requirements=
=General Requirements=
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=Links=
=Links=
*[[TED Talk]]
*[[TED Talk]]
*[[OSE Documentation at Dozuki]]
*OSE website - http://opensourceecology.org
*OSE documentation site - [[LifeTrac Documentation at Dozuki]]
*Prior work on current model of LifeTrac - see [[LifeTrac Modules]]
*Last version of this tractor - [[LifeTrac 5]]


=Other Links=
=Other Links=


*Application form for this challenge - [[File:lt6GC.odt]]
*[[GrabCAD Challenge Template]]
*[[GrabCAD Challenge Template]]
*See also [[LifeTrac 6 Product Requirements]].
*See also [[LifeTrac 6 Product Requirements]].
*See [[LifeTrac Modules]]

Latest revision as of 15:52, 28 August 2013

See challenge at GrabCAD - http://grabcad.com/challenges/open-source-tractor-lifetrac-6-challenge


Abstract on Design Goal: The following materials exhibit the current state of LifeTrac - Open Source Ecology's open source tractor. The goal is to take this design from a Mad Max ghetto rider to a quality, high performance tractor with articulated steering. The articulated steering is used to reduce wheel loads compared to skid-steering configuration - thereby simplifying the design of the wheel units drastically. We are currently designing the tractor for use with 1 or 2 Power Cubes - our 27 hp hydraulic power units. The goal of this challenge is to improve on this design based on past builds. See the results of LifeTrac 5 - and the numerous comments there on design issues in the videos. All details of this 'lifesize erector set' design are to be evolved until we have a satisfactory tractor. By helping this project, you are helping to develop a 'peoples' tractor' that can be built from stock parts - and that can be maintained easily by the user for a lifetime of service.


See intro video on the LifeTrac history -

The LifeTrac Story 2012. from Open Source Ecology on Vimeo.

Last Model - LifeTrac 5

This tractor has been deployed for testing at the Our School at Blair Grocery urban gardening project in New Orleans.

Error creating thumbnail: File missing

See LifeTrac 5

Existing Model of LifeTrac 6 - in Development

This one has one power cube. Loader cylinders need to be added.

Error creating thumbnail: File missing

Download Sketchup file (18MB): File:LifeTrac6.skp

If you don't already have Google Sketchup downloaded, get it Here.

Universal Constructor Set Pieces

Error creating thumbnail: File missing

For the final product to be modular and easy to assemble, the parts you use in the frame must come from the Warehouse

File:Warehouse.skp

General Requirements

edit

Cab Module Requirements

Click edit to access links in the drawing.

The hydraulic connections to and from the cab are all organized on a single panel: see Hydraulic Panel concept.

Link to Modules Page

Loader Arm Requirements

Edit This Drawing

Power Cube Module

Edit This Drawing ^^

File:LifeTrac6 PowerCube.skp


Quick Attach Module

We are using the Bobcat Standard Quick Attach module:

Error creating thumbnail: File missing

File:Quick Attach.skp

Bobcat_Standard_Quick_Attach_for_LifeTrac

Modular Wheel Units

These wheels mount on the frame tubing as quick-connect modules for the tractor:

Error creating thumbnail: File missing

File:Wheel Mount.skp

This is a detail of the wheel module frame:

Error creating thumbnail: File missing

Quick_Attach_Wheel_Module

Modular Wheel Units

Rear Wheel Base

This is the current design of the entire rear wheel base.

Edit This Drawing


File:Rear Wheelbase.skp

Steering Pivot

This is a detail of the suggested pivot that joins the front and rear sections of the tractor.

Edit This Drawing ^^

File:SteeringPivot.skp

General Requirements

LifeTrac 6 Product Requirements

First Cut

Ltgc6-1.png Ltgc6-2.png

Links

Other Links

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