SlideShare ist ein Scribd-Unternehmen logo
1 von 8
Downloaden Sie, um offline zu lesen
Recycled Bike
   Trailer




         Design: Richard Andrews
         Realisation: Ian Benford
     Illustustrations: Henry Godfrey
  Thanks to Maya Pedal and Re~Cycle
Introduction
Transport of people and goods is vitally important   little as possible with the safe and comfortable
to any economy . Where motor vehicles are not        handling of the bicycle. This is achieved by
available, a sturdy bicycle trailer will enable      mounting the trailer to the cycle's rear axle (rather
traders and farmers to move goods, machinery,        than the seatpost) using a specially designed,
tools and materials further and faster than they     flexible joint (again using bike parts!).
could ever be carried on foot. Fetching water is
another critical use, rather than carrying it or     Please note that if you make refinements to this
using a wheelbarrow, leading to saved time and       design, we would very much like to include them
cleaner / healthier living.                          in these documents. Please email
                                                     henry@laikadesign.net with suggestions. Updates
We set out to design a robust, low cost, simple      will be posted at www.re-cycle.org
trailer made from globally available materials and
unwanted bicycle parts. Any moderately             Also; Please do not copy this file to your own
technically minded person can succeed in this web site. Please link to it. This way, your viewers
project.                                           will benefit from and take part in the evolution of
                                                   this amazing trailer.
Ideally it should be welded together using a
simple arc welder, or it can be assembled using
nuts and bolts if no welder is available.
It has been designed to carry heavy loads (up
to 100kg) and has been refined to interfere as


Ingredients
Old bicycle parts:
                                                  Hacksaw
2x Forks of the same length. Avoid extra thick    Vice (optional)
mtb/bmx forks as they do not allow for attachment 10mm spanner
to the frame using the standard spindles.         Adjustable spanner
1x Bicycle frame with standard top tube (not      Drill + 3mm, 6mm and 10mm drill bits
ladies style)                                     Pliers
1x Standard type stem (not A-headset)             Metal File
Handlebars (aluminium racer or steel straight     Arc welder (optional)
bars)
2x Wheels, 20" or smaller.                        * A pipe bender (or plumber’s spring) is a metal
                                                  tube made from spiralled steel, essentially a very
To buy:                                           strong, tight spring. It is normally inserted into
                                                  metal pipes allowing them to be bent without
4m of 25mm angle-iron                             them collapsing. Here it is used to make a flexible
150mm of 3mm wire rope                            joint between the bike and the trailer. it has the
2 Small U-clamps                                  crucial benefit of being flexible without expanding
1x Length of pipe bender*                         or compressing.
Metal Primer
If you plan to bolt your trailer:                 Alternatives include hydaulic hose or thick guage
5x 6mm bolts (50mm in length)                     bike lock cable.
10x 6mm bolts (20mm in length)
15x Nyloc nuts
Tools needed:
1.                      Lay one fork onto the ground
           x2+          and measure the distance
                        from the crown to the
                        dropouts.

                        Multiply this measurement by
                        two and add 5cm (2”). This
                        will be the length of your
                        trailer.

                        Any longer and it may be
                        unstable when loaded.



2.                      Cut two sections of angle-
                        iron to the required length
                        (given by step 1).




3.                             Decide how wide you would
                               like the trailer to be. Ideally it
                               should be between 40cm
                               (16”) and 90cm (3’).
     between 40cm and
                               Cut two sections of angle-
                               iron to your chosen length
                               and position at the rear end
                               and at the middle point.




                               Tip: You may wish to design
                               the trailer around a standard
                               size, e.g. bread crate, or water
                               barrel.
4.
                             The final cross section needs to be
                             long enough to attach both forks to.

                             Before welding or bolting, ensure that
                             the sections are all square and that
                             the forks are parallel with the trailer
                             frame.
       parallel




                  parallel



                             Mark the points where the wheel axles
5.                           will go through trailer frame and drill
                             holes on both sides first using a 6mm
                             bit, then widening with a 10mm bit.
                             Its very important to get the holes
                             centred for the wheel axles. Too low
                             and its difficult to get the nuts on, too
                             high and the angle iron will be
                             weakened

                             Now you can weld or bolt the frame
                             together. If you plan to bolt the trailer,
                             you can use the brake holes at the
                             top of the forks.




                                     From your bicycle frame, cut
                                     a section that includes the top
                                     tube and the seat tube. This
6.                                   will form the towing bar.

                                     Bike frames ofen have a
                                     variety of tube diameters. If
                                     you have a selection to
                                     choose from, choose one that
                                     will snugly accomodate the
                                     fork tube and the stem.

                                     Also remove the stem and the
Stem
                                     handlebars.
7.




           Cut off the right-hand
           fork stem and file off the
           rough edge.

                                                  The next part is the towing bar.
                                                  It needs to line up exactly with
                                                  the left hand rear wheel mount.
 The section of frame
 should fit over the fork                         The towing bar will be welded
 stem giving extra                                in place later.
 strength.


                                                      The stem fits into the
                                                      top end of the towing
                                                      bar.
8.
                                                          The angle and length of your
                                                          towing arm will vary according
             8.                                           to the size of your wheels.

                                                          Attach the wheels and place
                                                          your trailer onto blocks so that
                                                          it is completely level.

                                                          When lining up the arm to fit
                                                          onto the fork stem, so that the
                                 Min. 4” (10cm)           trailer is level and the bike
                                                          centred, use a felt tip pen or
                                                          similar to mark the points on
                                                          both parts. These can then be
                                                          lined up in a more convenient
                                                          position for welding or drilling.
9.   The joint between the trailer and
     the bike is made from a bicycle
                                          If no pipe bender is available,
                                          hydraulic hose or a section cut
     stem, two sections of handle bar     from a thick cable bike lock can
     and a section of pipe bender.        be used to make the flexible joint.

     Pipe bender is ideal because it      An alternative to using the handle
     will bend in any direction, but it   bar stem, is a curved section of
     will not stretch or compress         racing handle bars. cut so that a
     causing the trailer to lurch back    right angle is obtainable, and fit
     and forth.                           in a similar way using the flexible
                                          joint.




        10.


                                 The shorter section of handlebar goes
                                 into the stem.

                                  The pipe bender should fit into handle
                                  bar sections.

                                  The longer section of handlebar is
                                  flattened at the end and drilled with a
                                  10mm hole. It can be flattened using
                                  a vice.

                                  Steel cable is used to keep the joint
                                  together. U-bolts secure it at both ends.




                                                    To strengthen the
                                                    joint, weld or bolt the
                                                    stem in place. Two
                                                    bolts will be needed
                                                    to prevent the towing
                                                    arm from twisting.
11.       To attach the trailer, use the
                                                                         bolts that hold the wheel.

                                                                         For quick release wheels,
                                                                         remove the spindle and insert
                                                                         the attachment
                                                                         between the frame and the
                                                                         wheel. Replace the spindle
                                                                         and re-tighten.




                                                               Tips:

                                                               File all sharp edges as children will like
                                                               to touch your trailer.

                                                               Load the trailer with the heaviest items
                                                               in the middle.

                                                               You may find it convenient to add a
                                                               stand to your bicycle.

                                                               Avoid using inner-tubes with unusual
                                                               valves. Stick with Schrader (car type)
                                                               valves or use the same as fitted to the
                                                               bicycle.

                                                               A bolted trailer can get out of shape.
Finishing: Line the trailer with whatever is available.        Carry a spanner for adjustments
Plywood is reasonable light and weather resistant. Metal
merchants sell mesh in sheets that can be welded in place.     Bolted trailers need a sturdy base.

Prime the metal with rust inhibiting (zinc) primer or
Hammerite.

Warning: Car drivers do not expect bicycles to be towing
trailers! Paint yours with bright colours to make
it more visible. Add lights, reflective tape or even a flag.
Trailer fabrication

Weitere ähnliche Inhalte

Ähnlich wie Trailer fabrication

Bearings and rodjoints definitions CBSE Class XII Engineering Graphics 2015
Bearings and rodjoints definitions CBSE Class XII Engineering Graphics 2015Bearings and rodjoints definitions CBSE Class XII Engineering Graphics 2015
Bearings and rodjoints definitions CBSE Class XII Engineering Graphics 2015Muhammad Jassim
 
38720563 vintage-go-kart-mini-bike-plans-1950s
38720563 vintage-go-kart-mini-bike-plans-1950s38720563 vintage-go-kart-mini-bike-plans-1950s
38720563 vintage-go-kart-mini-bike-plans-1950szebratwo
 
12772469 3wheel2
12772469 3wheel212772469 3wheel2
12772469 3wheel2zebratwo
 
Mite Cycle
Mite CycleMite Cycle
Mite Cyclezebratwo
 
Pedal Board Presentation boards
Pedal Board Presentation boardsPedal Board Presentation boards
Pedal Board Presentation boardsMatthew Crooks
 
Round Vs Square Manhole Repairs
Round Vs Square Manhole RepairsRound Vs Square Manhole Repairs
Round Vs Square Manhole RepairsMr Manhole
 
Chapter 1 introductution to railway and permanent way
Chapter 1 introductution to railway and permanent wayChapter 1 introductution to railway and permanent way
Chapter 1 introductution to railway and permanent waydhara dattani
 
Railway planning RHTA - VTU Module 1
Railway planning RHTA - VTU Module 1Railway planning RHTA - VTU Module 1
Railway planning RHTA - VTU Module 1AJEETH B
 
High quality mini chaff cutter machine price in pakistan
High quality mini chaff cutter machine price in pakistanHigh quality mini chaff cutter machine price in pakistan
High quality mini chaff cutter machine price in pakistankidanzmehret
 
Cross Section of Permanent Way.pdf
Cross Section of Permanent Way.pdfCross Section of Permanent Way.pdf
Cross Section of Permanent Way.pdfTVijayaGowri
 
Cross Section of Permanent Way.pdf
Cross Section of Permanent Way.pdfCross Section of Permanent Way.pdf
Cross Section of Permanent Way.pdfTURUMELLAVIJAYAGOWRI
 
Railway track design ppt 2018
Railway track design ppt 2018Railway track design ppt 2018
Railway track design ppt 2018ishwar dhakad
 
Gas ration-scooter
Gas ration-scooterGas ration-scooter
Gas ration-scooterzebratwo
 
Railway and highways, Airways material.pptx
Railway and highways, Airways material.pptxRailway and highways, Airways material.pptx
Railway and highways, Airways material.pptxRajuyadav437367
 

Ähnlich wie Trailer fabrication (20)

Chapter15
Chapter15Chapter15
Chapter15
 
Bearings and rodjoints definitions CBSE Class XII Engineering Graphics 2015
Bearings and rodjoints definitions CBSE Class XII Engineering Graphics 2015Bearings and rodjoints definitions CBSE Class XII Engineering Graphics 2015
Bearings and rodjoints definitions CBSE Class XII Engineering Graphics 2015
 
38720563 vintage-go-kart-mini-bike-plans-1950s
38720563 vintage-go-kart-mini-bike-plans-1950s38720563 vintage-go-kart-mini-bike-plans-1950s
38720563 vintage-go-kart-mini-bike-plans-1950s
 
12772469 3wheel2
12772469 3wheel212772469 3wheel2
12772469 3wheel2
 
Mite Cycle
Mite CycleMite Cycle
Mite Cycle
 
Pedal Board Presentation boards
Pedal Board Presentation boardsPedal Board Presentation boards
Pedal Board Presentation boards
 
Round Vs Square Manhole Repairs
Round Vs Square Manhole RepairsRound Vs Square Manhole Repairs
Round Vs Square Manhole Repairs
 
Chapter 1 introductution to railway and permanent way
Chapter 1 introductution to railway and permanent wayChapter 1 introductution to railway and permanent way
Chapter 1 introductution to railway and permanent way
 
Fasteners.pdf
Fasteners.pdfFasteners.pdf
Fasteners.pdf
 
Railway planning RHTA - VTU Module 1
Railway planning RHTA - VTU Module 1Railway planning RHTA - VTU Module 1
Railway planning RHTA - VTU Module 1
 
Railway track
Railway trackRailway track
Railway track
 
High quality mini chaff cutter machine price in pakistan
High quality mini chaff cutter machine price in pakistanHigh quality mini chaff cutter machine price in pakistan
High quality mini chaff cutter machine price in pakistan
 
Cross Section of Permanent Way.pdf
Cross Section of Permanent Way.pdfCross Section of Permanent Way.pdf
Cross Section of Permanent Way.pdf
 
Cross Section of Permanent Way.pdf
Cross Section of Permanent Way.pdfCross Section of Permanent Way.pdf
Cross Section of Permanent Way.pdf
 
Flat belt pulleys
Flat belt pulleysFlat belt pulleys
Flat belt pulleys
 
Wire ropes
Wire ropesWire ropes
Wire ropes
 
Railway track design ppt 2018
Railway track design ppt 2018Railway track design ppt 2018
Railway track design ppt 2018
 
Gas ration-scooter
Gas ration-scooterGas ration-scooter
Gas ration-scooter
 
Spinning i
Spinning iSpinning i
Spinning i
 
Railway and highways, Airways material.pptx
Railway and highways, Airways material.pptxRailway and highways, Airways material.pptx
Railway and highways, Airways material.pptx
 

Mehr von Community Bicycle Center (20)

Inspection Sheet 2014
Inspection Sheet 2014Inspection Sheet 2014
Inspection Sheet 2014
 
Spring Schedule 2014
Spring Schedule 2014Spring Schedule 2014
Spring Schedule 2014
 
Jumpstart our Youth Presentation
Jumpstart our Youth PresentationJumpstart our Youth Presentation
Jumpstart our Youth Presentation
 
Maine Recreation & Park Association
Maine Recreation & Park AssociationMaine Recreation & Park Association
Maine Recreation & Park Association
 
Youth Outcomes Executive Summary
Youth Outcomes Executive SummaryYouth Outcomes Executive Summary
Youth Outcomes Executive Summary
 
TFK Program Report
TFK Program ReportTFK Program Report
TFK Program Report
 
Resilience bonnie bernard
Resilience bonnie bernardResilience bonnie bernard
Resilience bonnie bernard
 
Habitsofthe mind
Habitsofthe mindHabitsofthe mind
Habitsofthe mind
 
Schedule spring 2013
Schedule spring 2013Schedule spring 2013
Schedule spring 2013
 
Youth Tandem Captains
Youth Tandem CaptainsYouth Tandem Captains
Youth Tandem Captains
 
Trek 2012 final
Trek 2012 finalTrek 2012 final
Trek 2012 final
 
Bike Monkeys Mentor Manual
Bike Monkeys Mentor ManualBike Monkeys Mentor Manual
Bike Monkeys Mentor Manual
 
Bike Monkeys Mentor Manual
Bike Monkeys Mentor ManualBike Monkeys Mentor Manual
Bike Monkeys Mentor Manual
 
Trek info packet cbc
Trek info packet cbcTrek info packet cbc
Trek info packet cbc
 
Schedule fall 2012
Schedule fall 2012Schedule fall 2012
Schedule fall 2012
 
CBC 2012 Year to Date
CBC 2012 Year to DateCBC 2012 Year to Date
CBC 2012 Year to Date
 
2011 Annual Report
2011 Annual Report2011 Annual Report
2011 Annual Report
 
Pledge Tracking Form
Pledge Tracking FormPledge Tracking Form
Pledge Tracking Form
 
Personal Fundraising Plan
Personal Fundraising PlanPersonal Fundraising Plan
Personal Fundraising Plan
 
Parental Support Needs
Parental Support NeedsParental Support Needs
Parental Support Needs
 

Kürzlich hochgeladen

How to Conduct a Service Gap Analysis for Your Business
How to Conduct a Service Gap Analysis for Your BusinessHow to Conduct a Service Gap Analysis for Your Business
How to Conduct a Service Gap Analysis for Your BusinessHelp Desk Migration
 
Rakhi sets symbolizing the bond of love.pptx
Rakhi sets symbolizing the bond of love.pptxRakhi sets symbolizing the bond of love.pptx
Rakhi sets symbolizing the bond of love.pptxRakhi Bazaar
 
Driving Business Impact for PMs with Jon Harmer
Driving Business Impact for PMs with Jon HarmerDriving Business Impact for PMs with Jon Harmer
Driving Business Impact for PMs with Jon HarmerAggregage
 
Exploring Elite Translation Services in Your Vicinity
Exploring Elite Translation Services in Your VicinityExploring Elite Translation Services in Your Vicinity
Exploring Elite Translation Services in Your VicinityThe Spanish Group
 
Welding Electrode Making Machine By Deccan Dynamics
Welding Electrode Making Machine By Deccan DynamicsWelding Electrode Making Machine By Deccan Dynamics
Welding Electrode Making Machine By Deccan DynamicsIndiaMART InterMESH Limited
 
Strategic Project Finance Essentials: A Project Manager’s Guide to Financial ...
Strategic Project Finance Essentials: A Project Manager’s Guide to Financial ...Strategic Project Finance Essentials: A Project Manager’s Guide to Financial ...
Strategic Project Finance Essentials: A Project Manager’s Guide to Financial ...Aggregage
 
Data Analytics Strategy Toolkit and Templates
Data Analytics Strategy Toolkit and TemplatesData Analytics Strategy Toolkit and Templates
Data Analytics Strategy Toolkit and TemplatesAurelien Domont, MBA
 
Unveiling the Soundscape Music for Psychedelic Experiences
Unveiling the Soundscape Music for Psychedelic ExperiencesUnveiling the Soundscape Music for Psychedelic Experiences
Unveiling the Soundscape Music for Psychedelic ExperiencesDoe Paoro
 
Jewish Resources in the Family Resource Centre
Jewish Resources in the Family Resource CentreJewish Resources in the Family Resource Centre
Jewish Resources in the Family Resource CentreNZSG
 
1911 Gold Corporate Presentation Apr 2024.pdf
1911 Gold Corporate Presentation Apr 2024.pdf1911 Gold Corporate Presentation Apr 2024.pdf
1911 Gold Corporate Presentation Apr 2024.pdfShaun Heinrichs
 
Pitch Deck Teardown: Xpanceo's $40M Seed deck
Pitch Deck Teardown: Xpanceo's $40M Seed deckPitch Deck Teardown: Xpanceo's $40M Seed deck
Pitch Deck Teardown: Xpanceo's $40M Seed deckHajeJanKamps
 
Send Files | Sendbig.comSend Files | Sendbig.com
Send Files | Sendbig.comSend Files | Sendbig.comSend Files | Sendbig.comSend Files | Sendbig.com
Send Files | Sendbig.comSend Files | Sendbig.comSendBig4
 
Ivey Leveraging Information Technology MBA 2024
Ivey Leveraging Information Technology MBA 2024Ivey Leveraging Information Technology MBA 2024
Ivey Leveraging Information Technology MBA 2024Nihal Nishadul
 
Interoperability and ecosystems: Assembling the industrial metaverse
Interoperability and ecosystems:  Assembling the industrial metaverseInteroperability and ecosystems:  Assembling the industrial metaverse
Interoperability and ecosystems: Assembling the industrial metaverseSiemens
 
NAB Show Exhibitor List 2024 - Exhibitors Data
NAB Show Exhibitor List 2024 - Exhibitors DataNAB Show Exhibitor List 2024 - Exhibitors Data
NAB Show Exhibitor List 2024 - Exhibitors DataExhibitors Data
 
Technical Leaders - Working with the Management Team
Technical Leaders - Working with the Management TeamTechnical Leaders - Working with the Management Team
Technical Leaders - Working with the Management TeamArik Fletcher
 
Fundamentals Welcome and Inclusive DEIB
Fundamentals Welcome and  Inclusive DEIBFundamentals Welcome and  Inclusive DEIB
Fundamentals Welcome and Inclusive DEIBGregory DeShields
 
Introducing the AI ShillText Generator A New Era for Cryptocurrency Marketing...
Introducing the AI ShillText Generator A New Era for Cryptocurrency Marketing...Introducing the AI ShillText Generator A New Era for Cryptocurrency Marketing...
Introducing the AI ShillText Generator A New Era for Cryptocurrency Marketing...PRnews2
 
Intermediate Accounting, Volume 2, 13th Canadian Edition by Donald E. Kieso t...
Intermediate Accounting, Volume 2, 13th Canadian Edition by Donald E. Kieso t...Intermediate Accounting, Volume 2, 13th Canadian Edition by Donald E. Kieso t...
Intermediate Accounting, Volume 2, 13th Canadian Edition by Donald E. Kieso t...ssuserf63bd7
 

Kürzlich hochgeladen (20)

How to Conduct a Service Gap Analysis for Your Business
How to Conduct a Service Gap Analysis for Your BusinessHow to Conduct a Service Gap Analysis for Your Business
How to Conduct a Service Gap Analysis for Your Business
 
Rakhi sets symbolizing the bond of love.pptx
Rakhi sets symbolizing the bond of love.pptxRakhi sets symbolizing the bond of love.pptx
Rakhi sets symbolizing the bond of love.pptx
 
Driving Business Impact for PMs with Jon Harmer
Driving Business Impact for PMs with Jon HarmerDriving Business Impact for PMs with Jon Harmer
Driving Business Impact for PMs with Jon Harmer
 
Exploring Elite Translation Services in Your Vicinity
Exploring Elite Translation Services in Your VicinityExploring Elite Translation Services in Your Vicinity
Exploring Elite Translation Services in Your Vicinity
 
Welding Electrode Making Machine By Deccan Dynamics
Welding Electrode Making Machine By Deccan DynamicsWelding Electrode Making Machine By Deccan Dynamics
Welding Electrode Making Machine By Deccan Dynamics
 
Strategic Project Finance Essentials: A Project Manager’s Guide to Financial ...
Strategic Project Finance Essentials: A Project Manager’s Guide to Financial ...Strategic Project Finance Essentials: A Project Manager’s Guide to Financial ...
Strategic Project Finance Essentials: A Project Manager’s Guide to Financial ...
 
Data Analytics Strategy Toolkit and Templates
Data Analytics Strategy Toolkit and TemplatesData Analytics Strategy Toolkit and Templates
Data Analytics Strategy Toolkit and Templates
 
Authentically Social - presented by Corey Perlman
Authentically Social - presented by Corey PerlmanAuthentically Social - presented by Corey Perlman
Authentically Social - presented by Corey Perlman
 
Unveiling the Soundscape Music for Psychedelic Experiences
Unveiling the Soundscape Music for Psychedelic ExperiencesUnveiling the Soundscape Music for Psychedelic Experiences
Unveiling the Soundscape Music for Psychedelic Experiences
 
Jewish Resources in the Family Resource Centre
Jewish Resources in the Family Resource CentreJewish Resources in the Family Resource Centre
Jewish Resources in the Family Resource Centre
 
1911 Gold Corporate Presentation Apr 2024.pdf
1911 Gold Corporate Presentation Apr 2024.pdf1911 Gold Corporate Presentation Apr 2024.pdf
1911 Gold Corporate Presentation Apr 2024.pdf
 
Pitch Deck Teardown: Xpanceo's $40M Seed deck
Pitch Deck Teardown: Xpanceo's $40M Seed deckPitch Deck Teardown: Xpanceo's $40M Seed deck
Pitch Deck Teardown: Xpanceo's $40M Seed deck
 
Send Files | Sendbig.comSend Files | Sendbig.com
Send Files | Sendbig.comSend Files | Sendbig.comSend Files | Sendbig.comSend Files | Sendbig.com
Send Files | Sendbig.comSend Files | Sendbig.com
 
Ivey Leveraging Information Technology MBA 2024
Ivey Leveraging Information Technology MBA 2024Ivey Leveraging Information Technology MBA 2024
Ivey Leveraging Information Technology MBA 2024
 
Interoperability and ecosystems: Assembling the industrial metaverse
Interoperability and ecosystems:  Assembling the industrial metaverseInteroperability and ecosystems:  Assembling the industrial metaverse
Interoperability and ecosystems: Assembling the industrial metaverse
 
NAB Show Exhibitor List 2024 - Exhibitors Data
NAB Show Exhibitor List 2024 - Exhibitors DataNAB Show Exhibitor List 2024 - Exhibitors Data
NAB Show Exhibitor List 2024 - Exhibitors Data
 
Technical Leaders - Working with the Management Team
Technical Leaders - Working with the Management TeamTechnical Leaders - Working with the Management Team
Technical Leaders - Working with the Management Team
 
Fundamentals Welcome and Inclusive DEIB
Fundamentals Welcome and  Inclusive DEIBFundamentals Welcome and  Inclusive DEIB
Fundamentals Welcome and Inclusive DEIB
 
Introducing the AI ShillText Generator A New Era for Cryptocurrency Marketing...
Introducing the AI ShillText Generator A New Era for Cryptocurrency Marketing...Introducing the AI ShillText Generator A New Era for Cryptocurrency Marketing...
Introducing the AI ShillText Generator A New Era for Cryptocurrency Marketing...
 
Intermediate Accounting, Volume 2, 13th Canadian Edition by Donald E. Kieso t...
Intermediate Accounting, Volume 2, 13th Canadian Edition by Donald E. Kieso t...Intermediate Accounting, Volume 2, 13th Canadian Edition by Donald E. Kieso t...
Intermediate Accounting, Volume 2, 13th Canadian Edition by Donald E. Kieso t...
 

Trailer fabrication

  • 1. Recycled Bike Trailer Design: Richard Andrews Realisation: Ian Benford Illustustrations: Henry Godfrey Thanks to Maya Pedal and Re~Cycle
  • 2. Introduction Transport of people and goods is vitally important little as possible with the safe and comfortable to any economy . Where motor vehicles are not handling of the bicycle. This is achieved by available, a sturdy bicycle trailer will enable mounting the trailer to the cycle's rear axle (rather traders and farmers to move goods, machinery, than the seatpost) using a specially designed, tools and materials further and faster than they flexible joint (again using bike parts!). could ever be carried on foot. Fetching water is another critical use, rather than carrying it or Please note that if you make refinements to this using a wheelbarrow, leading to saved time and design, we would very much like to include them cleaner / healthier living. in these documents. Please email henry@laikadesign.net with suggestions. Updates We set out to design a robust, low cost, simple will be posted at www.re-cycle.org trailer made from globally available materials and unwanted bicycle parts. Any moderately Also; Please do not copy this file to your own technically minded person can succeed in this web site. Please link to it. This way, your viewers project. will benefit from and take part in the evolution of this amazing trailer. Ideally it should be welded together using a simple arc welder, or it can be assembled using nuts and bolts if no welder is available. It has been designed to carry heavy loads (up to 100kg) and has been refined to interfere as Ingredients Old bicycle parts: Hacksaw 2x Forks of the same length. Avoid extra thick Vice (optional) mtb/bmx forks as they do not allow for attachment 10mm spanner to the frame using the standard spindles. Adjustable spanner 1x Bicycle frame with standard top tube (not Drill + 3mm, 6mm and 10mm drill bits ladies style) Pliers 1x Standard type stem (not A-headset) Metal File Handlebars (aluminium racer or steel straight Arc welder (optional) bars) 2x Wheels, 20" or smaller. * A pipe bender (or plumber’s spring) is a metal tube made from spiralled steel, essentially a very To buy: strong, tight spring. It is normally inserted into metal pipes allowing them to be bent without 4m of 25mm angle-iron them collapsing. Here it is used to make a flexible 150mm of 3mm wire rope joint between the bike and the trailer. it has the 2 Small U-clamps crucial benefit of being flexible without expanding 1x Length of pipe bender* or compressing. Metal Primer If you plan to bolt your trailer: Alternatives include hydaulic hose or thick guage 5x 6mm bolts (50mm in length) bike lock cable. 10x 6mm bolts (20mm in length) 15x Nyloc nuts Tools needed:
  • 3. 1. Lay one fork onto the ground x2+ and measure the distance from the crown to the dropouts. Multiply this measurement by two and add 5cm (2”). This will be the length of your trailer. Any longer and it may be unstable when loaded. 2. Cut two sections of angle- iron to the required length (given by step 1). 3. Decide how wide you would like the trailer to be. Ideally it should be between 40cm (16”) and 90cm (3’). between 40cm and Cut two sections of angle- iron to your chosen length and position at the rear end and at the middle point. Tip: You may wish to design the trailer around a standard size, e.g. bread crate, or water barrel.
  • 4. 4. The final cross section needs to be long enough to attach both forks to. Before welding or bolting, ensure that the sections are all square and that the forks are parallel with the trailer frame. parallel parallel Mark the points where the wheel axles 5. will go through trailer frame and drill holes on both sides first using a 6mm bit, then widening with a 10mm bit. Its very important to get the holes centred for the wheel axles. Too low and its difficult to get the nuts on, too high and the angle iron will be weakened Now you can weld or bolt the frame together. If you plan to bolt the trailer, you can use the brake holes at the top of the forks. From your bicycle frame, cut a section that includes the top tube and the seat tube. This 6. will form the towing bar. Bike frames ofen have a variety of tube diameters. If you have a selection to choose from, choose one that will snugly accomodate the fork tube and the stem. Also remove the stem and the Stem handlebars.
  • 5. 7. Cut off the right-hand fork stem and file off the rough edge. The next part is the towing bar. It needs to line up exactly with the left hand rear wheel mount. The section of frame should fit over the fork The towing bar will be welded stem giving extra in place later. strength. The stem fits into the top end of the towing bar. 8. The angle and length of your towing arm will vary according 8. to the size of your wheels. Attach the wheels and place your trailer onto blocks so that it is completely level. When lining up the arm to fit onto the fork stem, so that the Min. 4” (10cm) trailer is level and the bike centred, use a felt tip pen or similar to mark the points on both parts. These can then be lined up in a more convenient position for welding or drilling.
  • 6. 9. The joint between the trailer and the bike is made from a bicycle If no pipe bender is available, hydraulic hose or a section cut stem, two sections of handle bar from a thick cable bike lock can and a section of pipe bender. be used to make the flexible joint. Pipe bender is ideal because it An alternative to using the handle will bend in any direction, but it bar stem, is a curved section of will not stretch or compress racing handle bars. cut so that a causing the trailer to lurch back right angle is obtainable, and fit and forth. in a similar way using the flexible joint. 10. The shorter section of handlebar goes into the stem. The pipe bender should fit into handle bar sections. The longer section of handlebar is flattened at the end and drilled with a 10mm hole. It can be flattened using a vice. Steel cable is used to keep the joint together. U-bolts secure it at both ends. To strengthen the joint, weld or bolt the stem in place. Two bolts will be needed to prevent the towing arm from twisting.
  • 7. 11. To attach the trailer, use the bolts that hold the wheel. For quick release wheels, remove the spindle and insert the attachment between the frame and the wheel. Replace the spindle and re-tighten. Tips: File all sharp edges as children will like to touch your trailer. Load the trailer with the heaviest items in the middle. You may find it convenient to add a stand to your bicycle. Avoid using inner-tubes with unusual valves. Stick with Schrader (car type) valves or use the same as fitted to the bicycle. A bolted trailer can get out of shape. Finishing: Line the trailer with whatever is available. Carry a spanner for adjustments Plywood is reasonable light and weather resistant. Metal merchants sell mesh in sheets that can be welded in place. Bolted trailers need a sturdy base. Prime the metal with rust inhibiting (zinc) primer or Hammerite. Warning: Car drivers do not expect bicycles to be towing trailers! Paint yours with bright colours to make it more visible. Add lights, reflective tape or even a flag.