Donkey Calf Raise attachment (UPDATE)

in 3D Modeling Design held by Achilles
Contest Ended, Winner(s) have been selected.
Description:
This contest is to update the current design to connect and disconnect the Donkey Calf Raise attachment to various size smith machine barbell shafts. The Donkey Calf Raise attachment is a patented apparatus that can be attached to the smith machine barbell to perform the Donkey Calf Raise exercise. The current design will attach to all smith machine barbell shafts 25mm to 35mm. However, there are currently too many components that make up the design. I need a new design that will be easier to manufacture. The new design should have a quick way to connect and disconnect the apparatus to a 25mm to 35mm diameter smith machine barbell shaft. The connecting and disconnecting method should be durable to withstand constant use. The device should be able to handle 1200 pounds.

Please see the attached 3D STEP file, Inventor assembly & part files.
Attached also are images on how to perform the Donkey Calf Raise exercise.
Wants:
• A quick connect and disconnect to a smith machine barbell shaft
• Commercial grade construction
• Must be very durable to withstand constant use
• Modern looking design
• It should be able to fit 25mm to 35mm diameter smith machine barbell shafts.
• Material: Aluminum
• All Designs will be 3D Solid Models
•Final submittals: 3D Step file, High res PNG and PDF.
Don't Wants:
• Do not change the overall design; just change the way it connects to the smith machine barbell
• We do not want overly complex designs that are difficult to manufacture. Keep it simple
Software:
  1. Autodesk Inventor, Pro Engineer, SolidWorks, Solid

Entries

1st Winner
#2 Evn_dk by EVN
Hi,
Here is my proposal for your project. There are some renderings, a vidéo, and a picture with an explanation of the concept. Don't hesitate if you have any question or if you want me to do some modification.
Regards,
more
Mar 18, 2021 16:51
#12 Donkey Calf Raise attachment by CDdesignSTUDIO
Now we have threaded knob.You can use this device for all sizes,from 25 to 35mm
regards
Armin
more
Mar 21, 2021 3:16
#18 Donkey Calf Raise attachment V04 by walxo
Hi,
Attached you can find variant 4 of Donkey Calf Raise attachment . Maybe it's the simplest option .
more
Mar 21, 2021 16:56
#29 Donkey Calf Raise attachment (UPDATE) 02 by rayenb
Good day to you sir ,
I hope you are doing well , we thought about this design , i hope it meets your requirements
i will be more that pleased to remodify this design if needed
all feedbacks are welcome
best regards
Rayen
more
Mar 31, 2021 16:56
#13 Donkey Calf Raise attachment by CDdesignSTUDIO
Donkey Calf Raise attachment (UPDATE)
Fine tuning,tolerances and new STP file
regards
Armin
more
Mar 21, 2021 3:30
#30 Donkey Calf Raise attachment (UPDATE) 03 by rayenb
Good day to you sir ,
i changed the handle in away that make it more comfortable on the hand while pushing down
i will be more that pleased to remodify this design if needed
all feedbacks are welcome
best regards
Rayen
more
Mar 31, 2021 20:53
#33 Donkey Calf Raise attachment (UPDATE) 04 by rayenb
Good day to you sir ,
i did a new version of the handle
i will be more that pleased to remodify this design if needed
all feedbacks are welcome
best regards
Rayen
more
Apr 4, 2021 7:38
#1 Donkey Calf Raise attachment by Hamed1
Hello,
thank you for hosting this contest, i think the connection concept is good but yes you are right, these parts are very expensive for manufacture... so i assume that you will cast the base plate and i didn't change that and i changed donkey lock. but if you want to simplify the base plate too... then tell me to modify that. this is a concept and will improve and i will be happy to get feedback, so what do you think ?
Regards.
more
Mar 17, 2021 17:49
#32 Donkey Calf Raise attachment by dikis
Good afternoon, Sir
With my design, I hope it will be the best.
regards
DIKI
more
Apr 4, 2021 6:30
#43 Ratchet DCRA Mechanism by zarwanzy
Hello,
I have attached my design of the new mechanism for Donkey Calf Raise Attachment. Please let me know if you need any change from the design.
Thank you
more
Apr 13, 2021 18:06
#35 Dylan by Dylans
Good day Achilles
I focused on ease of manufacture and assembly with this design. It makes use of a ratchet mechanism incorporating just two laser-cut pieces of Aluminium. Laser-cutting is much faster and affordable than the manufacturing techniques likely required for the other submitted designs. The design is lightweight and strong thanks to the even distribution of force points. I would be happy to go through further design iterations with you.
I hope my design is, at least, a refreshingly new concept.
Cheers
Dylan
more
Apr 12, 2021 14:10
#28 Donkey calf raise attachment4 by Random_designer_7
Hello,
My updated design, to reduce manufacturing cost.
Thank you...
more
Mar 30, 2021 16:03
#27 User-friendly Donkey Calf Raise Attachment by Panji Hakim
Please check my design. Thanks
more
Mar 30, 2021 8:34
#25 Donkey calf raise attachment by Random_designer_7
Hello,
Here is my new concept about donkey calf attachment. Locker handle having a circular shape, so as we adjust the different shafts by adjusting the locker screw and locker bracket position (shows in blue colour).
I attaches rendering images. Give me a feedback, if any changes or query about mechanism.
Thank you.......
more
Mar 29, 2021 4:58
#24 Donkey Calf Raise Update by Manengineers
Hello,
This is simple modification design Donkey Calf Raise
Thanks,
Regards
more
Mar 28, 2021 3:50
#23 Donkey_Calf_Raise_attachment_Assembly_New Fixing by haitomi
This design uses the Quick Seven Lobed Knob.
which makes it easy to open and remove.
and can adjust to the wishes of the user.
if you want to stay fast, turn the knob clockwise until it is really fixed
more
Mar 26, 2021 8:53
#8 Donkey Calf Raise attachment by Hamed1
Hello,
According to your request I modified the model... please check the pdf presentation file, I also uploaded 3 animations for barbell shaft 25 , 30 and 35 mm... I think it's getting better and I would be happy to have feedback
Regards
more
Mar 19, 2021 13:07
#3 DCRA Revision by INDJMAY
Attached is a simple way to clamp that is more in tune with what you see in a gym. If you want more info on how it would work, the components involved or some aesthetic tweaks I am happy to help. Note that I have added three components to the mechanical closure, one of which is off the shelf purchaseable.
more
Mar 18, 2021 16:59
#4 Donkey Caf Rise Attachment-concept-01 by walxo
Hi,
I suggest my new locking concept .The donkey has and second safety locking device This is totally semple and and much cheaper to produce .Please take a look and give me a feedback.In the design is used self adhesive hook and loop strong tape.Material - Aluminium.Donkey Calf Raise attachment is same- just locking is changed.
more
Mar 18, 2021 18:27
#5 donkey Calf Raise 01 by rayenb
good day to you,
this edit design might meet your requirements
i will be more than pleased to re modify this design and i will think of some new designs
all feedbacks are welcome
best regard
rayen
more
Mar 19, 2021 7:59
#7 Updated donkey calf raise by Random_designer_7
Hello sir,
I uploaded my updated concept for donkey calf raise attachment. Presentation file includes the names of parts that I changed. I also attached rendering images from different angles. Give me a feedback about my design.
Thank you.......
more
Mar 19, 2021 11:02
#9 Concept 2 by Random_designer_7
Hello,
I change my model as per requirements. I also attaches a presentation file. The mechanism is explained in presentation. Handle and adjustable locker are moving parts in the model.
Thank you.......
more
Mar 20, 2021 4:50
#11 Donkey Calf Raise Attachment by CDdesignSTUDIO
Slightly different from your original product..
I removed some parts like pins,threaded rods.etc
We have just one T rod,one length for 30 and 25mm but we have slightly different handle at the top,it has some grooves,you just need to move that rod from 30 to 25 and lock.
No need to use wingnut to adjust rod diameter,springs or something like that.
Here you have render image and STP file.
regards
Armin
more
Mar 21, 2021 0:17
#15 Donkey Calf Raise attachment by Hamed1
Hello
as your request I designed a new concept...
please check the presentation PDF file for detail. I also uploaded 3 animations.
Regards
more
Mar 21, 2021 13:30
#17 Donkey Calf Raise attachment by CDdesignSTUDIO
In this case we have coarse thread,so you can regulate all with pitch size.
We do not have any additional part except handle and threaded rod.
One turn of the handle and you will have 26,another turn 27,so for different sizes you just need to turn that handle and lock your rod in place,thats everything.
Here you have render image and STEP file.
regards
Armin
more
Mar 21, 2021 14:01
#20 concept 07 by Random_designer_7
hello,
I uploaded new concept of my design. also added some rendering images. one image includes explanations. there are different holes for 25 to 35 mm shafts. give me a feedback about it.
thank you.......
more
Mar 22, 2021 17:12
#22 Donkey Calf raise attachment_twist by Seven
A simple mechanism for securing the apparatus.
more
Mar 26, 2021 6:36
#6 Donkey_Calf_Raise_attachment_Assembly by Roman_D
Hello,
Thank you for interesting challenge.
Check attachment word file please.
Thank you.
Best regards,
Roman D.
more
Mar 19, 2021 9:39
#36 DONKEY CALF MACHINE MULTY DIAMETER by dwy
I hope my design is what you need :)
more
Apr 13, 2021 2:16
#41 Donkey Calf Raise attachment (UPDATE) by Hamed1
Hi,
This is the last adjustable latch I used on the exist donkey lock...
more
Apr 13, 2021 15:45
#16 Title block Autocad by Vikram pimpale
Hello Kevinc2,
Its pleasure to make title block for your work. And I have created one as per your requirement. Please take a close look and let me know what changes you want in this. It will be great if you could provide your feedback.
more
Mar 21, 2021 13:38
#19 DONKEY CALF RAISE by ZOUHAIR
....
more
Mar 21, 2021 22:54

Discussion

Wed, 24 Mar 2021 15:57:21 +0000
sir,
please make the contest blind. I'm diligently working on the concept and upload once thumbnails are blind.

walxo

Designer

Tue, 23 Mar 2021 16:34:12 +0000
Hi Achilles,
Man, I am deaapointed .Maybe you have a favorit as it look like.There is to many suggested ideas but you dont like anyone except your the idea of your favorites.Mаn, maybe you are good in fitness area but Im sure ,you dont understand nothing in engineering area.Not all is money.
All the best

Hamed1

Designer

Sun, 21 Mar 2021 13:48:09 +0000
@Vikram pimpale you submitted in the wrong concept...

Achilles

Buyer

Sun, 21 Mar 2021 02:20:26 +0000
Designers, the attachment should be able to fit 25, 26, 27, 28, 29, 30, 31, 32, 33, 34 and 35mm diameter barbells.
Sat, 20 Mar 2021 11:26:51 +0000
Do your workshop included pipe lasercuting machine?What budget for production can be convenient for your ? If it is possible please send the knowledge about .

Achilles

Buyer

Fri, 19 Mar 2021 15:13:43 +0000
Designers please be unique in your design. If I think you copied someone else design; I will eliminate your design.

Hamed1

Designer

Thu, 18 Mar 2021 18:44:35 +0000
thanks for your comment.. I'm working on it... you can send feedback through my design entry and can you please hide thumbnails ?

EVN

Designer

Thu, 18 Mar 2021 11:36:19 +0000
Very interesting project ! agree with CDDesign, could it be possible for you to hide thumbnails ?

CDdesignSTUDIO

Designer

Wed, 17 Mar 2021 23:26:29 +0000
Great contest but please hide thumbnails.

Achilles

Buyer

Wed, 17 Mar 2021 18:45:55 +0000
Hamed this is a good start. Lets keep the baseplate the way it is. I like that design. As for your locking devise; I like the concept. Lets make the handle have a bit more leverage and comfort when locking.
Wed, 17 Mar 2021 01:37:19 +0000
Thanks for contest.....

alexisd

Designer

Tue, 16 Mar 2021 09:19:38 +0000
Hi,
Should the connection between the DCRA and the barbell shaft transfer rotational movement? Meaning if I rotate the DCRA is the barbell shaft rotating as well?

Vikram pimpale

Designer

Tue, 16 Mar 2021 05:47:24 +0000
Do you need all part models to be done with drawing and PDF or only the concept should be sent in PDF and step file.
Mon, 15 Mar 2021 09:39:25 +0000
"...to fit 25mm to 30 mm..." Does this includes 26, 27, 28, 29 mm or the shafts are only 25 and 30 mm?
Mon, 15 Mar 2021 05:44:09 +0000
Interesting project,..,.........Additional prizes will attract more design entries, Thank you! (It encourages time and energy put in for the project):)

REDA

Designer

Sun, 14 Mar 2021 21:55:50 +0000
Hi,
Happy to see you again ...
I will definitely think about a new solution

Thank you .

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