loading
How to create a fischertechnik Happy Spur Gears Model.

I play with different educational manipulatives for a living. (Visit www.weirdrichard.com). Over the years I have built different themed models using all sorts of toys. Often, this involves designing robots and other mechanisms.

A useful tool is a <I>Happy Spur Gear Model</I>. This is a model that demonstrates how different gears can mesh well together. Students are often puzzled by the spacing combinations to make a happy gear train.

A word of explaination: A happy gear train is a series of gear pairs that make little sound as they rotate. If the gear pairs are too close, they make a grinding sound. If the gear pair is spaced too far apart, the gear teeth will slip and miss making a wretched sound.

This is less of a problem with fischertechnik with the pin and slot connections than other manipulatives. You can slide ft elements around until the elements fit. Yet, it is important to give students an introduction to basic combinations. I cannot count how many times a
student was absolutely flumoxed about gear combinations. A Happy Gears model is an excellent resource to point a student in the right direction.

This instructable will describe how to create a fischertechnik Happy Spur Gears Model.

Note: The CAD looking images were generated by a CAD program and a fischertechnik elements library. I highly recommend Michael Samek's ftdesigner. ( available at http://www.fischertechnik-in-der-schule.de/)

Step 1: Gather Elements

You will need to gather your elements. The fischertechnik elements are available from a range of kits available from ebay, Craig's List, or fischertechnik retailers.

Elements can be purchased individually from www.fischertechnik.com.

The List:

1 Gear Wheel T20
1 Gear Wheel T40/32
3 Hub Nuts
3 Link 15s
6 Building Block 15 with Bores
3 Building Block 30s
2 Building Block 15s
3 Flat Hub Collets
3 Clip Axle 30s
3 Clip Axle 45
3 Axle Couplings
3 Crank Shafts
1 Base Plate 120x60
3 Cog Wheel T 10 Narrow
3 Clip Adapters
1 Gear Wheel T30
3 Bearing Sleeves
2 Building Block 7.5s

Step 2: Happy Spur Gears Model (Continued)

Insert a Building Block 30 into the last near slot of a Base Plate 120 x 60. Add (in order) a Building Block 15 with Bore, Building Block 15, a Building Block 7.5 and top off the post with a second Building Block 15 with Bore. Note the bores of the Building Block with Bores are oriented towards the long side of the BasePlate.

Step 3: Happy Spur Gears Model (Continued)

Insert a Clip Axle 30 into the first (lower) Building Block 15 with Bore. add a Crankshaft/Bearing Sleeve combination to the far axle end, and a Cog Wheel T10 to the near end.

Fix an Axle Coupling onto a Clip Axle 45, and insert the axle into the upper Building Block 15 with Bore. Note the Axle Coupling is located on the far side.

Step 4: Happy Spur Gears Model (Continued)

Fix a Gear Wheel T40/32 onto the Clip Axle 45 with a Flat Hub Collet and a Hub Nut. Add a Clip Adapter and a Link 15 onto the axle end.

Step 5: Happy Spur Gears Model (Continued)

Insert a Building Block 30 into the ninth slot from the far end of a Base Plate 120 x 60. Add (in order) a Building Block 15 with Bore, Building Block 15, and top off the post with a second Building Block 15 with Bore. Note the bores of the Building Block with Bores are oriented towards the long side of the Base Plate.

Step 6: Happy Spur Gears Model (Continued)

Insert a Clip Axle 30 into the first (lower) Building Block 15 with Bore. add a Crankshaft/Bearing Sleeve combination to the far axle end, and a Cog Wheel T10 to the near end.

Fix an Axle Coupling onto a Clip Axle 45, and insert the axle into the upper Building Block 15 with Bore. Note the Axle Coupling is located on the far side.

Step 7: Happy Spur Gears Model (Continued)

Fix a Gear Wheel T30 onto the Clip Axle 45 with a Flat Hub Collet and a Hub Nut.

Step 8: Happy Spur Gears Model (Continued)

Add a Clip Adapter and a Link 15 to the end of the Clip Axle 45.

Step 9: Happy Spur Gears Model (Continued)

Insert a Building Block 30 into the first slot from the near end of a Base Plate 120 x 60. Add (in order) a Building Block 15 with Bore, Building Block 7.5, and top off the post with a second Building Block 15 with Bore. Note the bores of the Building Block with Bores are oriented towards the long side of the Base Plate.

Step 10: Happy Spur Gears Model (Continued)

Insert a Clip Axle 30 into the first (lower) Building Block 15 with Bore. add a Crankshaft/Bearing Sleeve combination to the far axle end, and a Cog Wheel T10 to the near end.

Fix an Axle Coupling onto a Clip Axle 45, and insert the axle into the upper Building Block 15 with Bore. Note the Axle Coupling is located on the far side.

Step 11: Happy Spur Gears Model (Continued)

Fix a Gear Wheel T20 onto the Clip Axle 45 with a Flat Hub Collet and a Hub Nut.

Step 12: Happy Spur Gears Model (Continued)

Add a Clip Adapter and a Link 15 to the end of the Clip Axle 45.

Turn each of the Crank Shafts in order. Observe the gear pairs as they rotate, and note how smoothly they mesh. Count how many times you have to turn the crank to get one turn of output by observing the Link 15.

A Happy Spur Gears model is an excellent resource to assist students in constructing gear trains!
Thanks for this instructable! I really like seeing simple projects like this. I absolutely love gears and gear systems. I really love things like this that my kids can build and watch them try to figure out the "hows and whys" related to gears. I especially like worm gears, that really gets kids interested. Thanks again!
You are welcome. Watch for more projects! -Richard
me thinks you work for fischertechnik and this is disguised spam
even if he did how would this be spam? he is just showing how to build something.
Nah. I am not employed by fishertechnik. I work for an education company, and we author curriculum using manips such as Lego, K'NEX, and ft, (in addition to others). I have worked for these guys for over 15 years. My personal website documents some of my Lego (and other) projects. There is a lively Lego community, and instructables has a K'NEX group. There are ft users out there, and I thought some of my small ft projects would be a fun addition to instructables. Most of my personal ft collection has been purchased through Ebay, and I encourage people to seek the best deals on ft. I do endorse Michael Samek's ft designer, well because it is a good program...but I do not have any relationship with him. My instructables are buildable, detailed, and open source.

About This Instructable

7,688views

5favorites

License:

More by ftking_83702:Developer Workspace CAMLU 2010 August's Human Powered Robot 
Add instructable to: