Project 2.2.4 Pull Toy Construction
50 Points Total
Presentation of functioning toy to class- 30 points.
Active engagement with group during class work time- 10 points.
Questions in this packet- 10 points.
Introduction
A pull-toy is pulled along the ground
and a movement is produced, such
as a head nods, a tail wags or a
figure bobs up and down. The pulltoys use mechanisms to transfer
energy from the wheels to the
characters that define them.
Equipment
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Pencil
Procedure
With your knowledge of mechanisms, you and your partner(s) will design and build a
mechanism or series of mechanisms that will meet the following criteria:
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The mechanism part of your toy is to be built entirely from VEX parts provided
in class. Fun and colorful ‘extras’ can be incorporated into the toy, if you
choose.
The mechanism is to be built on a small 2 to 4 wheel chassis (base) capable
of being pulled across a flat surface with a rope.
A gear mechanism attached to the wheels will make another part of the pull
toy move. This movement should simulate something that a toy would do to
make it fun and exciting to use.
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PLTW Gateway – Automation and Robotics FT Project 2.2.4 Pull Toy Construction – Page 1
1) Individual Question- 4 points. No Internet. Brainstorm an idea for your Pull
Toy and sketch it here (pictures and words). Remember that it must incorporate
at least one mechanism- label that mechanism in your sketch. For a visual list
of the mechanisms we’ve studied you can view the 2.2.2 Mechanisms
Presentation on Canvas (under this assignment or Files). Remember that not all
mechanisms are infinite- only infinite mechanisms can be used for the
Pull Toy- list:
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Bevel Gear
Cam and Follower
Crank and Slider
Simple Gear Train
Simple Gear Train with Idler
Worm and Wheel
Chain Drive (must include a 2nd infinite mechanism)
Universal Joint (must include a 2nd infinite mechanism)
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PLTW Gateway – Automation and Robotics FT Project 2.2.4 Pull Toy Construction – Page 2
2. Team Question- 4 points. Get with your design team, share ideas, and fill out
this Decision Matrix. Also, show here (pictures and words) what the team’s
decision is. Be sure to mention which mechanism the team will use. If the team
decided on your exact idea from #1, simply say “see my #1”.
high
low
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PLTW Gateway – Automation and Robotics FT Project 2.2.4 Pull Toy Construction – Page 3
Conclusion
Please use a complete sentence (CS) for each. Individual questions.
3. CS. What would you have changed if you had time to redesign one part of your
pull toy?
4. CS. Which solution to this pull toy challenge presented by another group was
intriguing to you, and why?
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PLTW Gateway – Automation and Robotics FT Project 2.2.4 Pull Toy Construction – Page 4