Motor + reducer position

[TatianaResend]

To discover the best configuration of the motors in the machine, it is necessary to analyze several hypotheses and compare them.

[TatianaResend]

Option 1: Motor in sideways horizontal position (Worm Gear)

:x: not compact :x: weight +/- distributed :heavy_check_mark: no transmission system needed

[TatianaResend]

Option 2: Motor in horizontal position (Planetary gearboxes)

:x: not compact :x: weight +/- distributed :heavy_check_mark: no transmission system needed

[TatianaResend]

Option 3: Motor in horizontal position on top (Planetary gearboxes)

:heavy_check_mark::heavy_exclamation_mark: +/- compact :x: most expensive (+system transmission) :x: difficult to transport because the weight is all on top :x: need transmission system

[TatianaResend]

Option 4: Motor in vertical position (Worm gearboxes)

:heavy_check_mark: compact :heavy_check_mark: good weight distribution :heavy_check_mark: no transmission system needed :heavy_exclamation_mark: there might be some difficulty in placing the pieces, but it's a matter of working a little more in the CAD

[TatianaResend]

Notes:

• Try to find some information about efficiency (compare pallet reducers and worm reducers), to justify the choice without just being based on the volume of the assembly.
• The engines will be placed one on each side as it is not worth having them deviated, as it requires an additional transmission.
• Link from a reducer supplier: https://www.tecnopower.es/

[TatianaResend]

I think we need a torque of 665Nm and as the motors are 12Nm, you need a reducer, at least 56:1.

I looked on the TECNOPOWER website and found precision planetary reducers straight at 90º, that is to say they have an L configuration but either I don't know how to check their catalog or else to comply with the configurations the reducer is much bigger than what I was expecting . In this case, I was looking at this: https://www.tecnopower.es/producto/serie-afr and from the datasheet it seems to me that it would have to be the AFR180 model which is quite large.

As for straight gear reducers, it seems to me that there are none that meet the required output of 665Nm.

Regarding endless reducers I found this one: https://www.tecnopower.es/producto/eje-solido but from the datasheet I didn't find out which model will be needed.

So regarding the reducer, I'm not sure which is the best option or if there are other sites with other models.

[TatianaResend]

Ideally, a 90º planetary reducer will be used, as a good configuration is achieved and, compared to worn reducers, they are more efficient.

AHK140_24:

• It was confirmed that the AHK140_24 reducer could be a good candidate. For 2 steps, a reduction of 55 and torque of 805 Nm is achieved. With 3 stages, a reduction of 54 Nm and torque of 845 Nm.
• As the efficiency of the reducer is higher with 2 steps compared to 3 steps, a reduction of 55 would be preferable.
• But, this reducer belongs to the upper class, that is, it has a high price.

https://www.tecnopower.es/producto/serie-ahk-2-etapas

ABR142:

• A more economical solution will be an AB series gearbox.
• Preferably an ABR as it has a 90º configuration which makes it the most compact overall configuration.
• Namely, ABR142, which achieves a reduction of 60 with a torque of 600 Nm. Despite the torque being less than the required 665 Nm, the maximum torque is 1080 Nm which is more than enough.
• The maximum torque point is reached at the upper extreme points, that is, it will only be reached in specific cases and not in continuous work.
• It remains to confirm the dimensions and compatibility of this reducer as well as obtain its CAD, for this the datasheets must be carefully checked and, if necessary, contact the supplier.

http://www.apexdyna.com/download/catalog/ABABR-Eng.pdf http://www.apexdyna.com/ABR_pro.aspx#Object_PDF.aspx?ProductNo=ABR001&Item=Specification&Lan=E https://www.tecnopower.es/producto/serie-abr

[TatianaResend]

The reducer is secured to the frame at the top. In order to ensure that it is secure, it can also be fixed in the connection area between the reducer and the motor. This part will be drawn later because I don't have the CAD of the component that connects the reducer to the motor.

[TatianaResend]

I won't be implementing the reducer in the prototype as I don't have the available funds to purchase them and/or the time to implement them in the prototype.