New engineering challenges every week

Use your skills and earn money with your work

Lifetrac Backhoe

Medium

This contest is sequel to LifeTrack Quick Connect Wheel challenge held in GrabCAD. We need you to design the entire backhoe for the Global Village Construction Set. It will mount on the LifeTrac using standard bobcat interface attachment.

LifeTrac: http://opensourceecology.org/wiki/LifeTrac

Standard Bobcat interhace attachment:

http://opensourceecology.org/w/images/b/b1/Universal-attachment-mount-specification-sae_j2513.pdf

As with all Open Source Ecology designs, the backhoe will need to follow the following principles:

1. Design for fabrication- as simple as possible to build.

2. Lifetime design

3. Intensive scalability - in the most fundamental fashion. This specification is designed to produce a Backhoe Construction Set. All arm sections, cylinders, hoses, and the bucket should be removable so they can be replaced with parts of different sizes as necessary - like a Lego set but for real machinery.

http://opensourceecology.org/wiki/Intensive_Scalability

The challenge here is to design for modularity - to design the part connections such that part interchangeability is not only possible, but also practical and possibly easy.

4. Extensive Scalability - additional arm sections can be added to extend the reach or increase the range of functionality to log handling, electromagnet operation for steel works, high materials handling, jack hammering, etc).

Specifications:

- See Industry Standard Backhoe for reference.

http://www.deere.com/wps/dcom/en_US/products/attachment/worksite_pro_attachments/backhoes/bh11/bh11.page

- Basic operation will leave the LifeTrac plate immobile vertically but may move with the curl of the quick attach plate for extra mobility if needed, though the latter should not be the main moving mechanism of the primary boom.

- Should use hydraulic cylinders, all of which will attach to Life Trac via hoses with quick couplers.

- Bucket should be quick-attach to the secondary arm, to enable easy re-tooling.

- Bucket should have removable teeth.

- Hoses should be used only at joints, and metal tubing should be used for lifetime design whenever flexibility is not required.

- Should include stabilizer legs to prevent the machine from tipping.

- Can mount in back of tractor and to front on the quick attach plate.

- Takes account of Life Trac weight distribution and rated dig force.

- Operator seat and control valves are included on the attachment.

- Control valve is quick-connect with 30 gpm quick couplers.

- Hydraulic valve spools: 1 stabilizer leg valve (tandem motion of stabilizer legs), Main boom, Secondary boom, Bucket curl, Allowance for bucket thumb (for grapples).

Requirements

  • The basic model should have one boom, one secondary boom (stick), with an optional grapple (thumb) attachment, and one bucket, all of which can pivot individually

  • Digging Depth Minimum (L)- 3 m (9.8 feet)

  • Digging Depth Straight Wall minimum - 2.1 m (7 feet) (Capability of bucket to travel in a straight line down vertically. This involves pivoting at all 3 joints)

  • Reach From Swing Pivot minimum (K) - 4 m (13 feet)

  • Loading Height (J) - 2.7 m (9 feet)

  • Stabilizer Spread Transport Maximum (H) - 2 m (6.6 feet)

  • Stabilizer Spread Operating Minimum(G) - 2.9 m (9.5 feet)

  • Bucket Rotation 180 deg

  • Swing Arc 180 deg

  • Attachment Weight With 18-in. Bucket – Less than 2500lb (1137 kg)

  • Craning Capacity Minimum - 400 kg (880 lb)

  • Digging Force Using Bucket Cylinder - 2800 kg (6173 lb)

  • Backhoe System Relief Setting - 16500 kPa (2400 psi)

  • 457 mm (18 inch) heavy duty bucket has minimum 0.142 m3 capacity (5 cu. feet)

  • 610 mm (24") Heavy-Duty Buckets - has 0.093 m3 capacity (3.29 cu. feet)

  • Designs have to be in US units

Download specification

Rules

  • Winning design will be chosen based on the design and functionality

  • The competition is open to everyone

  • Team entries are welcome

  • You can submit several designs

  • Only models uploaded to GrabCAD library will participate in the competition

  • Tag your model with “LTBackhoe” to make it easier to find

  • Privately uploaded models will be made public after the competition deadline

  • Models can be done in any CAD software, including Sketchup, as long as a STEP or IGES files are also uploaded

  • Competition winner will be announced in GrabCAD’s blog

  • Only models uploaded through this challenge page will participate in the competition

Prizes

1st prize

750 USD plus additional award of 250 USD if less than 3 changes have to be made before building the design

2nd prize

GrabCAD motivation package

3rd prize

GrabCAD motivation package

4th prize

GrabCAD motivation package

5th prize

GrabCAD motivation package

6th prize

GrabCAD motivation package

About the jury?

Most creative design will be chosen by Open Source Ecolology with a little help from GrabCAD.

About Open Source Ecology

The Global Village Construction Set is a platform of is a modular, DIY, low-cost, high-performance platform that enables fabrication of the 50 different Industrial Machines that it takes to build a small, sustainable civilization with modern comforts. It's all open source and for the good cause.

41 comments

  • Doug Davey

    Doug Davey over 2 years ago

    Sorry, maybe I cant read too well.... when must this be done by?

    Doug Davey has uploaded 41 CAD models & has left 389 comments.
  • Tobias Mattsson

    Tobias Mattsson over 2 years ago

    DEADLINE
    20 days

    So the 19th of februari.

    Tobias Mattsson has uploaded 79 CAD models & has left 1017 comments.
  • Adam Pohl

    Adam Pohl over 2 years ago

    20 days for a complete backhoe design? 20 months would be more reasonable...

    Adam Pohl has uploaded 91 CAD models & has left 1433 comments.
  • Kim Villefrance

    Kim Villefrance over 2 years ago

    So if it were 20 months, you would be happy with 750/1000$ ?

    Kim Villefrance has uploaded 0 CAD models & has left 1 comments.
  • Laszlo Jakab

    Laszlo Jakab over 2 years ago

    When started this challenge? Last year? Because I am interedted in it but the time is too short.

    Laszlo Jakab has uploaded 12 CAD models & has left 13 comments.
  • Muhammad Bilal Ghaffar

    Muhammad Bilal Ghaffar over 2 years ago

    Very nice site with really nice challenges. :-)

    Muhammad Bilal Ghaffar has uploaded 113 CAD models & has left 308 comments.
  • Kaspar Kiis

    Kaspar Kiis over 2 years ago

    Sorry about the misunderstanding about the deadline. It has been extended. Feel free to ask any questions here and we will make sure they will be answered.

    Kaspar Kiis has uploaded 3 CAD models & has left 1175 comments.
  • Adam Pohl

    Adam Pohl over 2 years ago

    Anyone want to team up?

    Adam Pohl has uploaded 91 CAD models & has left 1433 comments.
  • rupesh dewangan

    rupesh dewangan over 2 years ago

    yes i want to team up...what i have to do??

    rupesh dewangan has uploaded 37 CAD models & has left 54 comments.
  • mohammad

    mohammad over 2 years ago

    me too .

    mohammad has uploaded 0 CAD models & has left 3 comments.
  • Kaspar Kiis

    Kaspar Kiis over 2 years ago

    GrabCAD would be very happy to see engineers joining into teams!

    Kaspar Kiis has uploaded 3 CAD models & has left 1175 comments.
  • Leonardo Alves

    Leonardo Alves over 2 years ago

    Legal.. vou entrar nessa!

    Leonardo Alves has uploaded 15 CAD models & has left 168 comments.
  • Akin Engin

    Akin Engin over 2 years ago

    İ have sample design on my hand i think design till 19th feb.

    Akin Engin has uploaded 0 CAD models & has left 1 comments.
  • Brianna Kufa

    Brianna Kufa over 2 years ago

    It should be noted that all steel stock should be in English units, as the build will take place in USA where metric materials are hard to come by.

    Brianna Kufa has uploaded 0 CAD models & has left 12 comments.
  • Padurariu Catalin

    Padurariu Catalin over 2 years ago

    Hi Briana, English units should be or it's mandatory?
    I'm from Romania not from America, and from my point of view the requirments and rules are already written :)

    Padurariu Catalin has uploaded 1 CAD models & has left 6 comments.
  • Brianna Kufa

    Brianna Kufa over 2 years ago

    Yes, this is mandatory. Sorry, I wrote the rules and forgot that crucial detail. =) I'll have Kaspar change it.

    However, most Open Source Ecology designs will eventually need to be translated to metric, so if both are included, it would be appreciated. (but not mandatory)

    Brianna Kufa has uploaded 0 CAD models & has left 12 comments.
  • Padurariu Catalin

    Padurariu Catalin over 2 years ago

    Interesting, is mandatory but not mandatory. Sorry for my irony but I'm little bit confused. The problem is that I started to design using the metric unit. Sorry, but I will not starting to redesign all my work using English unit. I assume that is not allowed to change the rules when the game is started. Please answer to my question to understand if I will continue or not.
    Will be take into consideration my work if I used Metric unit? Please answer with yes or not.

    Padurariu Catalin has uploaded 1 CAD models & has left 6 comments.
  • Padurariu Catalin

    Padurariu Catalin over 2 years ago

    Hello Marcin, will be take into consideration my work if I used Metric unit?

    Padurariu Catalin has uploaded 1 CAD models & has left 6 comments.
  • Troy

    Troy over 2 years ago

    If I am reading this right your smaller bucket the 18" you want 5cu ft of volume? that cant be right. Is this an error?

    Troy has uploaded 13 CAD models & has left 25 comments.
  • Brianna Kufa

    Brianna Kufa over 2 years ago

    Troy, you are right. This is incorrect. Disregard the volume and make an 18" wide bucket.

    Padurariu-

    No, we will not accept entries only in metric, as we are building in the US, and it is far more expensive to buy metric steel here.

    Brianna Kufa has uploaded 0 CAD models & has left 12 comments.
  • Padurariu Catalin

    Padurariu Catalin over 2 years ago

    ok

    Padurariu Catalin has uploaded 1 CAD models & has left 6 comments.
  • David Warren

    David Warren over 2 years ago

    I only use AutoCAD and cannot produce additional formats like iges/step. Too bad really, because I could design a complete machine with removeable tracks that would quick fit a backhoe, loader, trencher and many implements. Also, what is the main fuel used in your industrial attempts? Let me know if you'd be interested in some really terrific ideas that might redesign your whole perspective.
    Sincerely, David Warren
    Warren Design
    Hutchinson, Kansas, USA

    David Warren has uploaded 130 CAD models & has left 108 comments.
  • Alireza SKH

    Alireza SKH over 2 years ago

    Quantum u can import ur file to other Cad softwares and then have those formats.

    Alireza SKH has uploaded 54 CAD models & has left 1000 comments.
  • brisek

    brisek over 2 years ago

    can i give you my design if i am using educational version of inventor ??

    brisek has uploaded 1 CAD models & has left 1 comments.
  • george peters

    george peters over 2 years ago

    ok can someone explain the challenge in layman's terms.
    do you want shop drawings, stress calculations, hydraulic schematics
    material list, and assembly drawings?
    what is the STEP or IGES?
    every job is scalable but the stresses are exponential.
    did you want to build one from what we supply or
    just look and say yes this looks like what the major
    equipment manufacturers sell and therefore if it
    is presented without appearing to be proprietary or have
    patents then no one has to do research.
    this appears to be a request for 1000 hours of engineer's time
    with chance of winning $1000 or one dollar an hour?

    george peters has uploaded 0 CAD models & has left 1 comments.
  • Troy

    Troy over 2 years ago

    Where is your required (M) dimension? I do not see it.

    Troy has uploaded 13 CAD models & has left 25 comments.
  • Brianna Kufa

    Brianna Kufa over 2 years ago

    Troy, there is not a required dimesion for it. We used the dimension illustration from another tractor, so that was left on the drawing.

    Brianna Kufa has uploaded 0 CAD models & has left 12 comments.
  • Brianna Kufa

    Brianna Kufa over 2 years ago

    George,

    The shop drawings will be produced later from the model. Hydraulic Schematic will be developed by us. For now its just a model, but basic calc's must be done so it can reach required strength for digging. Step is a common CAD format. Yes, it is a lot of work for $1000.

    Briesk,
    Yes, as long as you can get it in the required format.

    Brianna Kufa has uploaded 0 CAD models & has left 12 comments.
  • Mike Perakis

    Mike Perakis over 2 years ago

    Can you provide some more information on the relief setting? Does this refer to the relief valve of the hydraulic pump?. Are we supposed to show it somehow in the model?

    Mike Perakis has uploaded 0 CAD models & has left 3 comments.
  • Brianna Kufa

    Brianna Kufa over 2 years ago

    Hello Mike, you do not need to show it. This is for when we are installing the hydraulics and purchasing materials, and was accidentally transferred to the challenge.

    Brianna Kufa has uploaded 0 CAD models & has left 12 comments.
  • Kyle B

    Kyle B over 2 years ago

    A design with less than 3 changes required before manufacturing? For $1000 USD? That's one hell of a deal.

    Kyle B has uploaded 8 CAD models & has left 13 comments.
  • Laszlo Jakab

    Laszlo Jakab over 2 years ago

    I don't find my modell among the competitors, but I uploaded it with 15 mins before the deadline. Any idea?

    Laszlo Jakab has uploaded 12 CAD models & has left 13 comments.
  • Kaspar Kiis

    Kaspar Kiis over 2 years ago

    @Rajesh_HUN it is there now. Can everybody please make sure they see their entries?

    Kaspar Kiis has uploaded 3 CAD models & has left 1175 comments.
  • Laszlo Jakab

    Laszlo Jakab over 2 years ago

    Thanks a lot Kaspar.

    Laszlo Jakab has uploaded 12 CAD models & has left 13 comments.
  • Branko Stokuca

    Branko Stokuca over 2 years ago

    Everything is OK.

    Branko Stokuca has uploaded 117 CAD models & has left 1005 comments.
  • jaydeep n

    jaydeep n over 2 years ago

    sir....When You declare result.....

    jaydeep n has uploaded 5 CAD models & has left 23 comments.
  • Freelancer Ciprian Berescu

    Freelancer Ciprian Berescu over 2 years ago

    My question also... when can we expect results? Thank you in advance.

    Freelancer Ciprian Berescu has uploaded 11 CAD models & has left 3 comments.
  • Kaspar Kiis

    Kaspar Kiis over 2 years ago

    The results will arrive very shortly.

    Kaspar Kiis has uploaded 3 CAD models & has left 1175 comments.
  • Kaspar Kiis

    Kaspar Kiis over 2 years ago

    Congratulations to all the winners and thank you to everybody participating in the challenge. This wasn't definitely one of the easiest ones. Still all the results are brilliant!

    Kaspar Kiis has uploaded 3 CAD models & has left 1175 comments.
  • Branko Stokuca

    Branko Stokuca over 2 years ago

    Good job everybody, congrats to the winner.

    Branko Stokuca has uploaded 117 CAD models & has left 1005 comments.
  • Troy

    Troy over 2 years ago

    Thank you, it was a fun competition. Congrats to all who entered.

    Troy has uploaded 13 CAD models & has left 25 comments.
  • Please log in to add comments.

    Log in

Save Cancel