KNEX Education GEARS User manual

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8+
GEARS
BUILDING SET
ENGRENAGES
JEU DE CONSTRUCTION
Education®
Experiments
Expériences‡
STEM
explorations
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2Education®
(EN)Parts List
Before you start building, be sure to
compare the parts in your set with the
parts list here. If anything is missing, call
or write to us using the information on
the back cover. We are here to help you!
(FR)Liste des pièces
Avant de commencer à construire,
assure-toi de comparer les pièces dans
ta boîte à la liste de pièces fournie ici.
S’il manque quelque chose, téléphone-
nous ou écris-nous en te servant des
informations figurant au verso de la
notice. Nous sommes là pour t’aider ! 422 9
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Building Basics
Start Building
To begin your model, find the and follow the numbers.
Each piece has its own shape and color. Just look at the
pictures, find the pieces in your set that match and then
connect them together. Try to face your model in the same
direction as the instructions while you build. The arrows
show you where the parts connect, but not all connections
points have arrows. Faded colors show you this section is
already built.
Spacers
There are places in your model where you need
to add spacers. Be sure to use the correct
number of spacers shown in the instructions.
Connectors
You can slide these special connectors together.
Push tightly until you hear a “click”. Pay close
attention to the instructions and position them
horizontally or vertically exactly as they are shown.
Bases de la Construction
Démarre ta Construction
Pour commencer ton modèle, trouve l’étape numéro et suis
les numéros. Chaque pièce a sa propre forme et sa propre couleur.
Regarde les illustrations, trouve les pièces qui correspondent à ce
que tu vois et assemble-les. Pour t’aider pendant que tu construis,
oriente ton modèle dans le même sens que les instructions. Les
flèches t’indiquent où les pièces s’assemblent, mais les points de
raccordement n’ont pas tous des flèches. Les pièces de couleur
délavée sont celles que tu as déjà assemblées.
Espaceurs
Il y a des endroits sur le modèle où des séparateurs sont
nécessaires. Assure-toi d’utiliser la bonne nombre de séparateurs,
comme indiqué sur les instructions.
Connecteurs
Tu peux assembler ces connecteurs spéciaux en les faisant
glisser l’un dans l’autre. Pousse fort jusqu’à entendre un
« clic ». Lis attentivement les instructions et positionne-les
horizontalment ou verticalement, en suivant exactement les
illustrations.
(EN)English (FR)Français
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Crank Fan Ventilateur
Lüfter Zwengel ventilator
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Education®
(EN) WARNING: CHOKING HAZARD – Small parts. Not for children under 3 years.
(FR) ATTENTION : RISQUE D’ÉTOUFFEMENT – Pièces de petite taille. Ne convient pas aux enfants de moins de 3 ans.
(ES) ADVERTENCIA: PELIGRO DE ASFIXIA – Piezas pequeñas. No para niños menores de 3 años.
(DE) ACHTUNG: ERSTICKUNGSGEFAHR – Kleinteile. Nicht geeignet für Kinder unter 3 Jahren.
(IT) AVVISO: PERICOLO DI SOFFOCARE – Pezzi piccoli. Non adatto per bambini sotto 3 anni.
(PT) AVISO: PERIGO DE SUFOCAÇÃO – Peças pequenas. Não se destina a crianças com menos de 3 anos de idade.
(NL) WAARSCHUWING: VERSTIKKINGSGEVAAR – Kleine onderdelen. Niet geschikt voor kinderen onder 3.
(EN) CAUTION: Keep hands, face, hair and clothing away from all moving parts.
(FR) ATTENTION : Garde les cheveux, les doigts, le visage et les vêtements à l’écart de toutes les pièces mobiles.
(ES) PRECAUCIÓN: Mantén el cabello, los dedos, la cara y la ropa alejada de las piezas móviles.
(DE) VORSICHT: Haare, Finger, Gesicht und Kleidungsstücke nicht mit beweglichen Teilen in Berührung kommen lassen.
(IT) ATTENZIONE: Tenere i capelli, le dita, il viso e i vestiti lontano da tutte le parti in movimento.
(PT) CUIDADO: Mantém o cabelo, os dedos, a cara e a roupa afastados de todas as peças móveis.
(NL) OPGEPAST: Hou het haar, de vingers, het gezicht en kledij verwijderd van alle bewegende onderdelen.
(EN) Make sure the 2 gears mesh.
(FR) Surveille l’engrènement.
(DE) Sicherstellen, dass die 2
Zahnräder verzahnen.
(NL) Zorg ervoor dat de 2
tandwielen aangrijpen.
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(EN) Change the speed of the fan’s spinning blades by
changing the gear ratio. Try Steps 5 and 6.
(FR) Quand vous changez la grandeur des parties vous
changez la vitesse des lames de fan. Suivez des instructions
5 et 6.
(DE) Ändern Sie die Geschwindigkeit der Rotorblätter
des Lüfters indem Sie die Getriebeübersetzung ändern.
Versuchen Sie die Schritte 5 und 6.
(NL) Verander de snelheid van de ventilator de draaiende
messen door het veranderen van de versnelling. Probeert
u stap 5 en 6.
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Education®
A crank fan uses a spur gear system to spin the blades around and make a breeze. The faster the fan turns, the stronger the
breeze. Using a big gear to turn a small gear makes it very easy to turn the blades quickly. For one full turn of the big gear,
the small gear spins around many times. How many times it spins depends on the number of teeth both gears have (gear
ratio). The spur gears turn the blades much faster than if you turned the blades directly with a crank.
Un ventilateur à manivelle utilise un système d’engrenages à roues droites pour faire tourner les pales et créer un courant
d’air. Plus le ventilateur tourne vite, plus le courant d’air est fort. Si l’on utilise un grand engrenage pour faire tourner un
petit engrenage, il est très facile de faire tourner rapidement les pales. A chaque fois que le grand engrenage fait un tour
complet, le petit engrenage fait de nombreux tours complets. Le nombre de tours dépend du nombre de dents de chacun
des deux engrenages. Les engrenages à roues droites font tourner les pales beaucoup plus vite que si vous les faisiez
tourner directement avec une manivelle.
(EN) What happens when the big gear drives the small gear?
(FR) Quels changements quand le grand matériel conduit le petit matériel ?
(DE) Was passiert, wenn das große Zahnrad das kleine Zahnrad antreibt?
(NL) Wat gebeurt er als de grote versnelling drijft het kleine tandwiel?
(EN) What happens when the small gear drives the big gear?
(FR) Quels changements quand le petit matériel conduit le grand matériel ?
(DE) Was passiert, wenn das kleine Zahnrad das große Zahnrad antreibt?
(NL) Wat gebeurt er als de kleine versnelling drijft het grote tandwiel?
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Education®For printer friendly versions of the experiments, go to: www.knex.com/instructions and enter the code 79318.
8
Objectives: Understand and describe
the transfer of motion through a
spur gear system and investigate the
relationship between gear size, speed
of rotation and force.
Materials You Will Need:
PROCESS:
1. Build the CRANK FAN model by following the step-by-
step building instructions.
2. Explore your model. Locate and identify the gears.
Watch the gear mechanism in operation as you turn
the crank.
79318
built CRANK FAN model
masking tape
paper or notebook
driver gear
fan blades
crank
driven gear
3. Using your notebook, explain how the gear system
turns the fan blades. How do the fan’s gears fit
together? Are they in line with each other?
4. This arrangement is called a Spur
Gear System. In this arrangement,
the gears fit together, or mesh,
along the same line or in the same
plane. In the Crank Fan, the gears
are arranged one above the other.
Turn your model on its side so you
can see how the gears are in line with each other.
5. The names of the various
parts of this model are:
Crank, driver gear, driven
gear, and fan blades. Using
masking tape, label the
different parts of your
model.
6. Using your notebook,
respond to the following:
(a) Describe how the moving parts that you labeled
above are connected to each other.
Experiment #1
Using a Spur Gear
System in a Crank Fan
(EN) English

Education®
For printer friendly versions of the experiments, go to: www.knex.com/instructions and enter the code 79318. 9
(b) Describe the input motion (the motion you use
when you operate the crank).
(c) Describe the motion of the gears.
(d) Draw a diagram of the gear arrangement in your
notebook and use arrows to show the direction
each part moves as you operate the fan.
7. Attach a small piece of masking tape to the edge of
one fan blade and select a reference point so you can
keep track of the fan blade as it rotates.
(a) Turn the crank to make one rotation. Continue
turning the crank but vary the speed at which it
is turned. How can you make the fan turn faster/
slower?
(b) Mark the two gear wheels with either a dot sticker
or with a pencil mark. The marks should be made
at the point where the two gears mesh. Now turn
the crank one slow turn. What do you notice?
(c) Note in your notebook the sizes of the two gears -
driver and driven – used in the model.
(d) Could there be a relationship between the size of
the gears and your findings to (b)?
(e) Turn the crank one additional turn, but this time,
notice how far the fan blades travel. Ask a friend,
parent, or teacher to count the number of times
the blade with the masking tape passes the
selected reference point, and focus on making just
one full turn with the crank.
(f) How easy/hard is it to turn the crank with this gear
arrangement?
(g) Summarize your observations concerning the
distance the two gears and the fan blades turn
with one rotation of the crank.
8. (a) What do you think will happen if you use:
(i) a large gear wheel to drive a small gear wheel &
(ii) a small gear wheel to drive a large gear wheel.
• Make a note of your responses in your notebook.

Education®For printer friendly versions of the experiments, go to: www.knex.com/instructions and enter the code 79318.
10
(b) Discover if your predictions were correct by
rebuilding your models with two gears that are
different in size using these images.
(c) Think of a way to compare the speed that the fan
turns, with the speed of the crank when the big gear
is attached to the crank and the small gear is attached
to the fan blades.
(d) How easy/hard is it to turn the crank with this
arrangement compared to when the gears were the
same size?
• Make a note of your responses in your notebook.
(e) Compare the speed at which the fan turns with the
speed of the crank, when the small gear is attached to
the crank axle and the big gear is attached to the fan
blade’s axle.
(f) How easy/hard is it to turn the crank with this
arrangement, compared to when the gears were (i)
the same size and (ii) the large gear was the driver?
• Make a note of your responses in your notebook.
9. (a) Discuss your observations of gear systems using
different sized gears.
(b) Do your observations support the prediction that
you wrote earlier? Report your conclusions using
evidence from your investigations.
For the Extension Activity: Gear Ratios, please
visit: www.knex.com/instructions and enter the
code 79318.