Third Leg

third leg

spring semester 2012

introduction

BackgroundBestnet AS is modern towing trailer manufacturer. It is so popular, that even word „trailer“ in estonian is often pronounced as „tiki-trailer“. Bestnet is also one of the biggest exporter of Estonia, with yearly turnover in exess of 15 million euros. The main market is Scnadinavian countries and the brands are called TIKI and AKU. Tiki-trailer focuses on continuous development of quality and production technology.

Aim of the projectThe aim of this project is to develop a smart trailer. Smart trailer is a trailer that has higher self-awarness than current plain metallic structures. Following points give a brief overview of points which to consider: - Smart trailer, that is able to register overload due to exessive weight, bad weight distribution, wrong driving manners etc. - Integrating electronics to raise the trailer self-awareness. - Integrating smart structures that react on abnormal function of trailer. - The aerodynamics to reduce the fuel consumption. - The weight reduction to reduce the fuel consumption. - Unification of used materials to reduce the manufacturing costs.

Team

Tutors

Tarko Koger

MA D&Efirst year

Henrik Herranen

Tallinn University of Technology

Aleksei Oleinik

MA D&Efirst year

Sven Sõrmus

Estonian Academyof Arts

Janno Nõu

MA D&Efirst year

Max Böhme

BA Industrial Designfourth year

design & engineering | TTÜ & EKA Tallinn | springsemester 2012

contents

introductioncontentscar trailerworking methodvisit of Tikiuser interviewsinterviews with leasing servicesopinions from internet blogsmarket situationTikis range of productscompetitors in comparancetrailer attributesusers specific used trailer

analysis of the web-presentationtrailer problemsprogresssecond meeting with Tikiritual of boot-trailers usageritual vs. robotic

direction for ideasidea generationidea selection and evaluationconcept preparationconcept selection

mechanical inspirationsconcept modellingcoupling connectionadaption to the real traileradvanced concept-modelsfinal designdeveloped designcalculation for the springrisk analysisstatic-load-stress analysistrigger developmentprototypingsources

RESEARCH

ANALYSIS

CONCEPT

DESIGN

A general overview

For many transportation issues, trailer are the first choice. Be it, that people cannot afford a big transporter, or that they don‘t need it every day, in relation to the price of a big car allows a trailer more specialized use. Besides this are some goods or objects simple to big for cars, like boots for example.Indeed, using and driving of a trailer needs experience, especcially for bigger trailers and so people need the special application BE for their driver-licence. That this is not a guarantee for a diligent use is totally clear, everybody is oblivious in a way.

car-trailer

[some examples how not to transport something]

?

research


So trailer manufacturer nowadays are producing more and more special trailer for the special issues. That less mistakes will happen and that the use of working become more practical and give mor independence to the people. There existing one the one side solutions trough extra equipment and on the other side customized trailers with adapted dimensions, characteristics and implemented equipment.

current situation, analyse

of tiki

Pictures

Competitionanalyse/picturesNeeds of users/

owners, from our interviews

pile of information

Requirements for the trailer

brainstorming

Ideas

Comparing / Ideation

WINNERBreef and clear understanding,

what, where ,for whom ect.

ideas

teisipäev, 28. veebruar 12

working method

Our goal

Due to the fact, that the bigger part of the team didn‘t worked deeper in the trailer-business before, we started with a broad research. Also it was important to find some special solution for Tiki, which gives them the possibility to set apart from their competitors and reach a unique selling pont. Our final development of one product means in this way of thinking not the only possible way. In analysis of the current state and the circumstances, our discussion and concept-generating about the future of trailers in general, became the second leg in this project.What we did at the end, is only a first step in this proposed direction.

Our way

We collected a bunch of informations and analyse them, for setting the different importances. Then we made concepts of the trailers close, medium and far future, for which we created respective ideas and concepts. These are presented in this report. For the most realistic issue, which is also in the frame of time, costs, producing possibility and without competitive alternatives we finally made a range of solutions. In decision of the circumstances we selected one idea, worked out the design and brought it to a prototyp.

research


visit of Tiki

7.02 Our first visit to the companyTiki presented their company in general: structure, facilities, manufacturing, machinery, warehousing, logistics. During our consultation company representatives said that they do not want to restrict our flights of thoughts but contrary during our process, more and more restrictions and “things needed to be considered” continuesly appeared themselves while developing because realistic outcome – prototype – was expected at the end of the course. Our team also only sees point and value generating concepts that are feasible. Therefore production and development possibilities needed to be clarified. That was definitely essential to set further frames because this probably wouldn’t be some futuristic concept but more realistic one that might even end up prototyping.

user interviews

It lasts so long to winch the third wheel up again.

It‘s all about experience.

When I drive my vehicle on the tilted trailer, he seems to brake.

To drive back is difficult; the back of the trailer is out

of view.

The empty trailer is dancing on the

highway!

The third wheel makes often

problems while driving.

When I don‘t need the trailer I store it

in the garage.

I expect that the trailer is usable everywhere like my Lada-Niva.

Never sure if the load an the hook

is still ok; you can only gauge.

I have no feeling for the trailer when

taking a turn.

I check the weight of the load while

looking how broad the tires are.

For our first interviews we asked private users with more and less experience. Of course the problems are different from person to person, but some points appeared again and again.

research


the taillights are often broken while driven backwards

against sth.

the leasers forgot to wind up the

third wheel

people rarely read the manual

the leasers don‘t know the parameters for

loading

plastic covers are more aerodynamik

the cover is too heavy for women

sometimes people want to have a trailer but don‘t

have a hook

we prefer Respo cause of the better supply, when we have to repair

something

the customers don‘t care about the trailer, cause it‘s not their own

interviews with leasing services

For our interviews of trailer-leasing we went to some building markets in Tallinn, which offer a less or more good service, to some Gas-stations in Pärnu, whose want to earn extra cash and so only use the most easy trailers of less than 750kg (no special permissions neccessary) and at least to the bigger rental service in Pärnu.

TIKI RESPO

Pros Cons Pros Cons

do not complainlights were connected in a wrong way

more quality made

lack of INNER hooks in standard equipment

new TIKIs handle overloading better

does not handle overloading

cheapertendency to float underload

hits suspension to the end

falls apart (8 years experienced both)

feels massive and heavy

higher trailer surface - higher lifting surface

LOADED TRALER: side swinging

good capacity/ overloading carrier

tighter in width

stronger sides small ground clearance

problems with brakes

more fixing hooks on standard package

suspension does not strike if some extra kg-s

LOADED TRALER: vertical swinging

tolerates overcapacity/overloading

lightness (3m - 220 kg)

due to low ground clearance - frequent harvesting

better looking stronger frame - rec new RESPO

issues with brakes but 2 times less than TIKI

more reliable (used both)

cheaper exploitation

better assembly, integration if parts needed to be exchanged

TIKI user feedbackRESPO user feedback

Used both or just commentator

opinions from internet blogs

The users also make recommendations• Go for better offer (8 years experiencced both)• With brakes• new respo (stronger frame)• respo because of handling overcapacity• 4 wheels: TIKI - 1 shaft balanssiiridega; RESPO - 2 separate shafts• IT‘S ALL ABOUT MAINTAINER

research


internet blogs

market situation

stan

dard

tra

ilers

spec

ial o

ffer

700

€

prof

essi

onel

tra

ilers

prof

essi

onel

tra

ilers

with

brak

es

clos

ed t

raile

rs

prof

essi

onel

boo

t tr

aile

rs

boot

tra

ilers

beac

h tr

aile

rs

trac

tor

trai

lers

cabl

e tr

aile

rs

car

trai

lers

and divisionTikis range of

products

research


By checking the range of products from competitors, some small differences were found. It‘s at least not only about the products, which vary less, but also more about the way of presenting, which gives a different accentuation on the trailers.So we compared the prices related to the different trailers, marked some specialized parts and took looks into the presentation/way of providing (see analysis of Tikis homepage).Other than Tiki or Respo, the P+P trailer center is a trading firm instead of a producer. They are selling trailers which are mostly manufactured in Germany or the Netherlands. The range of products is wide and so it gives an insight into the german trailer business.

standard

standard with brakes

double axes

double axes with brakes

boat trailers

boat trailers with brakes

car trailers

flatbed trailers

van trailers

RESPO TRAILERS prize in €

525-1770

2066-2396

1422-1760

2294-3035

466-1345

1533-3811

2493-4664

2428-4388

2190-5515

max. weight in kg

750kg

1500kg

750

1700-2700

700-750

900-3500

2000-3500

1700-2700

750-2000

size in cm

1.50x1.203.50x2.063.00x1.503.50x1.803.00x1.503.50x1.803.00x1.504.00x1.503.80x1.795.80x2.095.80x2.098.10x2.414.00x1.824.90x2.053.06x1.685.50x2.203.00x1.503.50x1.75

types

17

5

8

9

11

11

6

4

9

<750kg

<1400kg

<2000kg

<2600kg

Trailer at the P+P Trailercenter prize in €

500-1235

1045-2000

1325-2745

1790-3470

load in kg

520-580

780-1080

1100-1620

2100-2190

size in cm

202x114300x150210x110300x150250x125300x150300x150400x185

types

19

21

13

7

smile T.

standard T.

profi T.

profi with break T.

boot T.

profi boot T.

strand T.

car T.

closed T.

cable T.

tractor T.

TIKI TRAILERS prize in €

700

710-970

900-1630

2010-4220

800-1000

1110-4830

630-1000

3350-3800

3740 , 4530

3720 , 4360

3140-4180

load in kg

629

443-612

387-579

968-1682

369-635

582-2001

484-1043

1430-2010

386 , 935

1071 , 2187

2301-3023

size in cm

265x122

200x122275x138350x148252x123299x148382x209

418x196489x194346x144

types

1

4

9

9

4

7

3

4

2

2

3

Differences in the range of products from P+P

- no boat trailers and less speciallised order of trailers - cheapeast offering for a standard trailer (but it‘s a small one) - trailers use not only metal, for example also plywood for the sideboards - sale most times already with the third wheel - accentuation on the „service-friendly“ bolting, so less welded trailers - 10 years of guarantee (Koch-Trailers) - differentiation through the weight of the load and applied covering

competitorsin comparance

research


Differences in the range of products from Respo

- more use of bolted trailers - well organized homepage (see later in analysis of Tikis homepage) - more specialized trailers and better range of products - boat trailers much cheaper than from Tiki - biggest possible choice of standard trailer

the inconsiderable diffence in the look:

braking issues

overweight

weight positioning

anti-theft devices

reliability

normal functionsabnormal functions

upgrade possibility

weather proofed

empty driving

tilting possibility

opening possibility

weakwheelarches

foldablepole

processof coupling

to car

the third wheel

power- cables to the car long life

materials

fixing of the load

trailer attributes

TRAILER

research


users specific used trailer

prefer the trailer with the longest life

prefer normally the cheapest trailer

just need something for transportation

HIGH OPERATING EXPERIENCE

LOW OPERATING EXPERIENCE

private owners

leasers

boots

vehicles

manifold load

commercial

]

]

]

[

[

[

animals

analysis of the web-presentation

To find more reasons for Tikis current market situation, we also examined their homepage in comparance to other trailer-companys. The main problem we get out of this, is that Tiki don‘t determine a special orientation of their qualities. That way the users and customers don‘t know about the special characteristics, which in our opinion could be a accentuation on long life. Some small failure in the web-presentation let the homepage of Tiki standing back behind the one of Respo. Again the inconciderable difference in the look:

We took also looks into other webpages of german trailer companies, to get more different design-solutions.

analysis


first look - at the startpage for the countrys no picture of a trailer - looks like Respo (colours) - no mark on a special characteristic of TIKI

shop - categories only with words --> less clearness what it is - no possibility for a comparance of trailer on the first look (like Respo) --> non-direct connection between trailer and the information about - totaly no pictures for the extra-stuff

extra informations - in „Why Tiki“, Products and Contact no pictures - „Why Tiki“ implicate other companys for trailers - in „About Company“ bad graphic-design (non-professional) - no helping information for the customer, which trailer is the best for him

orientation - differentiation with countrys or languages? - three clicks to the final product is OK (sometimes only 1 click), but the way is hard to find

From the research with users of normal and also boot trailers, we listed the most common problems and handicaps in use. The choice contains largely the points, which could be intersting in the view of deign and engineering.

trailer problems

sharp edge which rip clothes

sidesboards become instable

without the backboard

overload on the coupling

hook

third wheel isa forgotten in the down

position overladissue

lights brake easy while backdriving

analysis


third wheel falls down

while driving

only help for alight the boot

out of the water, not for alighting

water get into the lights, but not out again

balancing of the boat even with help quite

difficult

tends to rust

not adjustable in height

no places to stand during the procedure braking

electronic connections

progress

On a gigantic map we collected all our previous informations. Some of the original issues seemed to be quite ridiculous in consideration of the feasibility Tiki could offer. We tried to find a logical direction from Tikis recent position to our design.

Finally we chose some issues to working on, which we presented to Tiki:

stronger connection

plug

failsafe third wheel

weight measuring equipment

weight measuring on coupling

wheel

analysis


15.03Second meeting with Bestnet AS.

We made brief presentation and discussed over the following topics:• Trailer in general• Tiki’s product portfolio• Tiki products in comparison with competitors• Market and competitor analyses• Customer survey: from users aspect• Resellers/distributors feedback: problems with users

Additionally we introduced and proposed several initial possible solutions for improvements to the main problems. Our main goal was to fix the development direction among standard, professional or boat trailers. Bestnet’s interest was to go towards boat trailers.

In our discussion afterwards we decided to elaborat more on a research for the boot-trailer, but we allready said, that many problems of the boot-trailer not so much different from normal ones. That for we would also go on with finding solutions for most of the common trailer problems.

second meeting with Tiki

the ritual use of a boot trailer

• Technical service, check• Visual check• Holistically in one piece• Safe to drive• Condition of tires and pressure in it• Connecting trailer to a car – „click“ sound• Control lifting for coupling hook connection• Safety cable mounting• Socket connecting• Car ignition• Lights check• Turn signals• Break lights• Side (gauge) lights• Reverse lights• Lifting up the third wheel: if doesn’t fix -> remove entirely• Delivering trailer from storage place to yachtport where loading takes place: meanwhile as well as default short distance control ride• Trailer unlinking from car: for later balancing• Trailer position fixing with chocks and handbreak• Loading• Yacht is lifted with crane• Edges are tied with rops for more exact positioning and directing the yacht• Fixing the load with fastening belts and elastic rope hooks• Positioning the softeners in between possibly might frictioning surfaces• The equipment is prepacked before loading in order to avoid dust, dirt and possible damages from hitting tarmac from the road • If loading is fixed – physical check for fasteners via shaking and wiggling• Reversing car as near as possible to coupling hook: for most it’s difficult (even I have had slight touch between coupling hook and rear spoiler)• Appling handbreak for car • Connecting trailer with car• Loading distribution check: if nessecary – adjustment• Visual check and evaluation from sides as well as from back view• Tire pressure control: if need for adaption – stop in gas station• Visual check via mirrors when starting to drive• While fueling or stops – visual check and physical control for fastenings

From a for many years experienced user of boat trailers we get the exactly order what you have to do, when using a boat trailer:

analysis


ritual vs. robot

Allready in the research we mentioned, that a lot of the problems like broken third wheel or broken lights, but also a bad weight distribution or an overloading are caused by careless users. These problems are not more important, when the users have a lot of experience. Of course also for the well experienced owner of a trailer would these kind of systems like an electrical weight-measuring practical. The question arised, how many technological affort how much benefit for the users would bring.

As the two extreme points we set a super experienced user and on the other side a fully automatical trailer, which act nearly like a robot. Both extremes are not desirable, cause of the costs for the robotic-trailer or because of the mistakes which can happen till a user is well experienced.So the aim is, to find smart technical solutions or designs, how user can play the ritual in an easier way without mistakes.

users neccessary experience

technicalsolutions

use with least risk

design solutions

use with more risk

fullrobotic trailer

expert use

(ritual)

direction for ideas

From the already collected problems, we choose four which seemed to fit in our claims for smartness, benefit for the users and feasability for Tiki.

weight distribution

easy to forget to plug or to

unplug

get wet and short the

whole electric system

needs time while using

fall down while driving

will brake when it is forgotten

no information if the load iss to much and

right balanced

dangerous problems

while driving

brake while backdriving

third wheel

lights and electrical system

oblivious user(ritual of use)

concept


idea generation

We collected some ideas, how it would be possible to solve the problems:

Long discussions in the team, with Henrik and the teachers brought us the problem, that on the one side super-technical-advanced solutions would be innovative and able to solve the problems, on the other side these solutions are not possible today. Tiki wanted to give us a free field for exploration, but also we wanted to make something realizable.So we decided to kick out the problem of the weight distribution: To solve this problem you have to change the complete system of the coupling part, what is not possible in the context of our project, or you can implement some simple extra systems. Latter already exist how we found out; special scales you can use on the coupling hook of the car or which are implemented in the third wheel:

For other problems also exist some smart additive solutions:

idea selectionand evaluation

concept


The residual solutions we checked out with an evaluation matrix:

concept prepraration

The idea evaluation didn‘t identified a clear way; again it was a contradiction between too simple and too difficult solutions. So we made a second evalution with the aim, to find realisable work in the context of our project and to be also able to say, what would be the next step on the path of developing the super-smart trailer.

After all we distributed the ideas into three concepts, to show what would be possible in the future, but what doesn‘t fit into the recent schedule.

NOW

improved

ritual

no budgetsimple add-ons

low-tech

helper

some budgetsome basical changes

FEW YEARS

intelligent

robot

unlimited budgethigh-technical

FUTURE

concept


NOW

improved

ritual

no budgetsimple add-ons

easy change with

plugconnections

third wheel gets a secondary adjustment

systemshort checklist of the ritual at the coupling

more hooks for fasten the belts and the plane

simple metal structures

pretend the ligths from

braking

The use of the trailer like a ritual means actually, that you will not forget the actions you have to do nowadays. All solutions have a cheap realisation and don‘t change the system, only add something. For task like the weight-measuring should be used already available add-ons. (see idea-selection)

possibility to winch the boot into the water

failsafe and easier use of

the third wheel

third wheel cannot be forgotten

plug has remind-bell

against being forgotten

ability to adjust the height

completely waterproofed & brake-secured

lights scale for load balancing

low-tech

helper

some budgetsome basical changes

FEW YEARS

The use of the trailer like a helper means, that all systems should become more reliable and with more adjustment possibilities. Also is the trailer able to mention, when for example the the user forgot top connect the lights. Then a noise would sound. Systems like measuring tools could be partly implented, but could be also still exist as add-ons.

concept


intelligent

robot

unlimited budgethigh-technical

FUTURE

The trailer like a robot would be able to achieve a lot of actions by his own. Controlled by a central black-box, the user can command via his voice or a smartphone screen. There it is also possible to check the conditions of the load and if problems appear you will get autonomous information.

automatic pushing and pulling of the

boot

automaticalle uprising third

wheelvoice-control,connection to the car & smartphone application

digital load measuring for

balancing

automatical adjusting

rollers

automatically decoupling and power-connection

black-box control system with wireless connection to

the user

concept selection

Adequacy for the project

From all single solutions in the three possible concepts we finally decided in the team to work on the issue of the third wheel. It shall be possible to create an design, which can Tiki produce by its own without investing in special equiptment or capacities. Also the mechanical part seemed to be complex enough, when it should work mechanical automatically.Following the NOW-concept for a promtly realisation, the aim is find a solution with fits in the most already existing trailer.

Benefit for the User

In the research become clear, that the third wheel is a point which has often problems. These are more important than, for example the lights system, which is only needed for communication in traffic. When you lose the third wheel, than that will have other bad consequencies. (see red graph) With inversion of the problems to their reasons, we can say what the third wheel should be able to do. (green graph)

concept


recently problematic

conceptional third wheel

not possible to discouple the

trailer when it‘s loaded

you have to remove it while

driving

cannot usethe trailer

(only super-light load)

the third wheel brakes

the wheel can fall down while driving

the user can forget to rise

the wheel

you have to buy a new one

lose money

lose time

save time

wheel cannotbe forgotten

wheel cannotfall down

save money

mechanical inspirations

design


design modelling

With a bound of sketches we started to approach the design and found out, that for the 3rd-wheel-system are mostly three parts neccessary:1. the way the third wheel is able to rise2. how it will be locked in both positions3. how we can connect the system to the coupling

1. the way the third wheel is able to riseFor uprising exist two posibilities: The wheel can strictly lift up or it can turn arround an pivotable point. Latter would have to advantage, that there is less friction to be mentioned. For both solutions it has to find a way, how giving the power to the system. The system should also work, when there is no electrical power from the car, so in mechanical thinking springs are most capable.

a straight uplifting system with locker and pulling springs

X

design


some pivotable systems(pivotbale point inside/outside the main profile; rotable plate instead of axis; different solutions for the fixing point)

Finally we decided for a torsion spring in a pivotable system. Then there is no long way (for lifting up the third wheel) like a normal spring had also need and this torsion spring would take the least space for working.A common use of them you can find in automatic knifes, which have already an intersting locking system.

One problem of the spring was the length (or broad) of the spiral: This would mean, that the third wheel have to be placed more far away from the main profile and could become so instable. Or it has te be place beneath the spring, which also brings quite similar problems.

design


2. How it will lock

Again with the pivotable spring system we had to decide, if we want to use one turning point or better a turning plate. The plate would have much more stability and distribute the tension of the wheel, but would also generate much more friction. Together with the fact, that for the locking system are two fix-points better (even the third wheel would stay up, because of the spring), we choose the pivotable plate. So the locker, or trigger how we called it, can have to fixpoints in the plate.It should be made out of one material to don‘t use to much parts and assembling time. The flexibility can be created with cutting long holes into the material, which drops the resistibility of the solid material.

3. how we can connect the system to the coupling

For an intelligent connection to the coupling-system, we evaluated when the locking system need and can get which input-information from the coupling:

It showed, that the couple-connection (the system which will unlock the third wheel when you couple the trailer to the car) is only allowed to work when the car is uncoupled and the third wheel is fixed. If it would also work when the car is coupled, then you cannot push the third wheel down by discoupling; the locker wouldnt work.

process

trailer alone

coupling

before discoupling

third wheel

down

up

down

coupled

no

yes

yes

locker

locked

unlocked

workable

connected to couple

yes

working

no

coupling connection

design


3rd wheel down + car uncoupled

The locker (right orange part) hold the 3rd wheel (left orange part) in tension; the couple-connection (blue) is pulled back by a spring (blue)

coupling

The couple-connection pulls(0) the locker out of the tab location(1) and the pulling end (red cross) slides upwards in the hole(2) of the backplate (green).The 3rd wheel already try to turn.(3)

coupling + uprising wheel

The trailers coupling is nearly closed and the 3rd wheel turn 90° in the hoizontal position.The pulling end is so high in the hole(4), that it nearly gives the locker free again.coupled + uprised/

The puller is at the end; his spring want to pull him back, but the coupling of the car is holding him.The puller gets free and flip back because of the own flexibility.(5)It‘s possible to push the 3rd wheel down again, even though the car is coupled.

uncoupling

By uncoupling the car, the spring bring the puller back in the original position.If the trailer loaded, the third wheel has to be pushed down at first.

1

3

2

4

5

x

0

Examination if the trailer-partFor a better and constant development we removed the front part of the trailer Tiki had given to us. In the coupling system we checked at the part, which is moving by connecting the trailer to the car. The bolt is able to pull strongly over a distance of 2 cm. Also we took the right measurments of the recent adjustment of the third wheel.

The moving part in the coupling system. The red dot-line marks the way and distance it pass.

adaption to the real trailer

design


In this idea the spring works also around a tube, which is holding additionalle the pivotable part and is holded by itself through a sheet-metal-shroud. This shroud would be able to stop the third wheel at the lowest point and has directly the connections to the base at the trailers frame.

Here a turnable plate, holded in a ring between two other plates is holding a tube for spring and the third wheel with two long screws. The holding plates are connected with screws and also with screws fixed to the base of the trailer profile.

advanced concept-models

Problems of the design with the movable plate had been, that it has to be really big when it should fit together with the recent holding part of the third wheel. The tubes with the special cut should be not necessary, while using the original holding part. The three layers for holding the pivotable part, also a lot of scews and in this way assembling time is required.By an inversion of the holding frame to the inside and using the most of the parts in a opposite way, we finally found an easier design with less parts:

base on the trailer profil

base-plate

movable partwheel-adjustment

triggerholding plate

tube

The adjustment for the 3rd wheel is combined with the movable part and holding the tube.The base on the trailer profil is combined with the base-plate and the holding-plate; they are fix and hold the other sid of the tube.

The completely movable part is stabilized by pressing against the edge of the holding-plate and against the end of the tube (which leads on the base) in the other direction.

The spring is attached to the movable part und in a hole in the fixed holding-plate.

final concept

design


- movable parts (orange) - fixed parts (blue) - tube (light grey) - screws (dark grey) - spring (red)

developeddesign

design


calculationfor the spring

design


risk analysis

static-load-stressanalysis

To check if the indeed robust planed design seems to be able for competing with the reality, we made a digital static-load-stress analysis. It showed that all expectations on the material should be fulfilled.

design


trigger development

To find the best working trigger, we had checked also a few different shapes of the material-spring-mechanism.

final version

stress

displacement

prototyping

With the help of Tiki we started a prototype-production, to check out the function in real. For this we had to divide the movable part into two pieces, which later become welded together. Together with the spring and the screws, which were supposed to be standard-parts, we assemblied all in TUT for the testing and the final presentation.

admin 24.05.2012

Designed by Checked by Approved by Date

1 / 1 Edition Sheet

Date

130

109

55

58,6

31

R20

R5,5

4,1

Materjali paksus 3 mm

A ( 1 : 1 )

A

admin 24.05.2012


1 / 1 Edition Sheet

Date

167

R90

130

80

3

85

16

5,5

124°


admin 24.05.2012


1 / 1 Edition Sheet

Date

8028

R6

R3

155

167

161

22

52,5 52,5

40

1111

Materjali paksus 3mm

puller

kogus 2

admin 23.05.2012


1 / 1 Edition Sheet

Date


3520

20°

3,5

7

R3,5

R5R3

,5

tube

admin

23.05.2012

Designed by

Checked byApproved by

Date

1 / 1 Edition

Sheet

Date

32

36

40

Oluline välisdiam

eeter 40 mm

. Sisem

ine diameeter vastavalt võim

alustele vahemikus 30...36 m

m

design


With the exception of the trigger, Tiki made all parts quite well. But while testing the prototype, Alex and Tarko found out: some parts needs little changes of 0.1 - 2.0 millimetre in the design, to work fluently. Also the spring has to have exactly the right power.

scources

http://www.anhaenger24.de/forum/forumdisplay.php?f=30http://www.mobil.org/_news/fahren_mit_anhnger_fordert_disziplin_am_steuerhttp://www.wer-weiss-was.de/theme107/article5899701.htmlhttp://de.cars.yahoo.com/25052007/348/anhaenger-esp-gespannfahren-endlich.html

http://de.wikipedia.org/wiki/Anh%C3%A4ngerhttp://de.wikipedia.org/wiki/Gummifederachsehttp://de.wikipedia.org/wiki/Anh%C3%A4ngerkupplunghttp://de.wikipedia.org/wiki/St%C3%BCtzlasthttp://de.wikipedia.org/wiki/Bremse_%28Kraftfahrzeug%29http://de.wikipedia.org/wiki/St%C3%BCtzlastwaagehttp://de.wikipedia.org/wiki/Anti-Schlinger-Kupplung

http://ppanhaengercenter.com/Kipper:::1765.htmlhttp://www.boeckmann.com/pkw_anhaenger.htmlhttp://www.brenderup.de/http://www.anssems.nl/du/bedrijfsinfo.htmlhttp://www.cargotrailers.de/http://www.eduard-anhaenger.de/http://www.hulco-anhaenger.de/http://www.excalibureurope.com/http://www.humbaur.com/http://www.kochanhaengerwerke.de/http://www.pongratz-anhaenger.com/http://www.wmmeyer.de/intro/http://www.stedele.de/http://www.respo.ee/en/about-us/Company-informationhttp://www.midtrailer.se/Engelska/CompanyInformation.aspx

http://www.amazon.de/St%C3%BCtzlast-Waage/dp/B00116XDIShttp://www.amazon.de/Berger-Digitale-St%C3%BCtzlastwaage/dp/B003DOCHYC/ref=pd_sim_sbs_sg_3http://www.kc-engineering.de/aid-1970-5er-Pack-2-3-oder-4-polig.htmlhttp://www.satking.de/Empfangstechnik/Empfangszubehoer/Stecker-und-Dosen/F-Stecker-7-mm-Wasserdicht-HQ.htmlhttp://german.alibaba.com/products/underwater-connector.html

http://texaskayakfisherman.com/forum/viewtopic.php?f=53&t=119229&start=0&sid=c71d2bd8ff1ed452821973a00df186c3 http://www.sherline.com/disaster.htm http://www.tysse.no/ http://forum.4x4.ee/viewtopic.php?f=49&t=13218&sid=5b43d7a990f64e21bce699053fd68ce2http://carshowroom.autotrader.com.au/forge/data_entry?tp=Prod&category=vehicle+specifications&temp_type=detail&style_id=64315620080201

Vibration Analysis for Electronic Equipment (3rd Edition)Steinberg, Dave S. © 2000 John Wiley & SonsMotor Vehicle Structures: Concepts and Fundamentals, Jason C. Brown, A. John Robertson, Stan T. Serpento, Butterworth-Heinemann 2002Sclater & Chironis - Mechanisms And Mechanical Devices Sourcebook 3rd ed [McGraw-Hil 2001]Marks‘ Standard Handbook For Mechanical Engineers_Mcgraw Hill (1996)(1519s), 10th.EdMachinery‘s Handbook 26Th Edition (Complete Despite The Size)


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