Adaptable Wheelchair for Handicapped Dogs

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Introduction: Adaptable Wheelchair for Handicapped Dogs

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Update: In the past few months we have optimized the design of the wheelchair. Some of the model files have changed. If you plan to build the wheelchair please feel free to contact me, I can help you selecting the best model for your needs.

A few months ago we discovered Luisa, a handicapped puppy who was born without forelegs on the website of an animal protection organisation (www.pro-tier.de) and decided to build a 3D-printed wheelchair for her. In the meantime we finished the wheelchair and have adopted Luisa. This project is open-source and we want to give everybody the opportunity to help a handicapped animal with this instructable and the 3D-Files we uploaded with it.

The Wheelchair comes in two sizes (The bigger size consists of several parts, so that it can be printed on smaller printers as well) and is adjustable in every possible aspect (width, height,camber,...).

All printed parts were printed by my company (www.multec.de) on our biggest 3d printer (Multirap M420). Of course the files can be printed on any printer, as long as the print area is big enough.

Step 1: What You Need

Here's what you need to build a wheelchair:

- a 3D printer for the 3D printed parts

- aluminum tubes 18x1,5 mm (lengths depend on the size of the dog, you better just buy ~3 meters and saw/cut it at home to the correct dimensions)

- tube connectors (e.g. from KIPP http://www.kippwerk.de, 4x K0485.18, 4x K0487.18, 2x K0472.1818, 4xK0486.18, 4xK0488.18_a, 12x K0494.018150)

- wheels: We chose wheels with a diameter of 250mm, these are usually used for bicycle trailers or buggies. Cost ~30 euro a pair. Make sure to buy tires with tube, because they absorb shock energy and tire pressure can be adjusted to different underground conditions.

- optional: a Third (smaller) wheel to help the dog as long as he is not used to balance the chair.

- an axle to connect the wheels to the wheelchair. We used a simple threaded rod. What you specifically need depends on your selected wheels. Depending on your choice you might as well need an additional printed adapter to connect the axle to the aluminum tubes

- A soft inlay (e.g. Foam) to make the wheelchair more comfortable for the dog

- Fasteners/belts (2x) to make sure the dog doesn't fall out of his wheelchair.

- bolts and nuts (M5, M4 in different lenghts)

We spent around 130€ for all needed parts.

Step 2: Print!

Print the attached files.Make sure to enable support-structures for overhanging areas. Since the parts are pretty big, i would recommend you to use 'fast' printer settings (big layer heights) and a heated printing bead to prevent warping problems. Also, I used PLA-Filament instead of ABS, because there are less problems with warping. Make sure that you don't run out of filament while printing.

Note: There are 2 versions. For small dogs print "printed frame Puppy", which is one part.

For big dogs print printed_frame_right, printed_frame_left, mountingplate_small and mountingplate.

If you want to add an additional wheel, make sure to print mounting_device_high as well.

Step 3: Assemble!

Assemble the parts according to the pictures above

Step 4: Adjust!

Adjust the assembled chair, so that it fits well. Adjust camber angle, caster angle , ground clearance, width, heights and lenght

Step 5: Train!

Let your dog train with the wheelchair. The following is the most important part of this instruction:
Do not force the dog to use the wheelchair, make the training as comfortable as possible (read: use dog treats). Though giving a new level of freedom, the wheelchair might be a strange object to the dog at first. Let him get used to it slowly and he will learn to use and like it.

If you have any questions or need assistance building a wheelchair, feel free to contact me.

In case you want to read more about Luisa, you can follow her on facebook: https://www.facebook.com/luisas.tagebuch or on http://luisas-blog.de/

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77 Comments

Hi, I'm fiorella and I have a dog without the left front leg and now is suffering of a lot of pain in her back because of her weight. I'm leaving in Perú. How can I get one those chairs? I don't have any manual o technological abilities. Thank you.

Hey Fiorella,

This is rather difficult, since you are Peru is really far away. I'm not sure if you can source the needed parts (mainly the connectors) there.

How big/heavy is your dog?

Hi, thank you for answer me pretty fast. My dog is 15 kilos.

great job! It's a pleasure to meet people like you. My dog ​​is a Golden and does not have the front left leg because of a cancer. We had surgery and he's happy but we'd need the same wheelchair as Tucker. Would that be possible? Please tell me how to get in touch with you. I am writing from Spain. Thanks for everything

Hey there!

I'll send you a message and hope I can help you and your Goldie :)

This is Really Awesome - we are a Non-Profit working with over 145 Rescue & Shelter organizations in Texas and we have been thinking about starting a Wheelchair loaner program for years now but this 3D printing idea opens a whole new opportunity for so many in need. We are thinking about purchasing a printer and making wheelchairs with front, back and all 4 wheels do you have any suggestions, ideas or advice for us: ) Thank you for all you do and for Helping Us Help Them! Judy & The RPAL Team

Hey Judy,
Sorry, I havent seen your comment earlier. If it's still relevant feel free to write me a message and I'll be happy to help you :)

Great Job on this one !!!!, Going to give it a try, just a problem to find those tube connectors, is there a way i could print those, maybe there are some files for that, would be handy :)

Hey there,
where are you from?
I wouldnt recommend printing these, since they really need to handle high forces. If you want to contact me, in the meantime I made some improvements to the print files.

LOVE IT! SO SWEET!