- #1
RKD89
- 78
- 1
Hi,
I am trying to build (or at least conceptually) design a diy autonomous lawnmower.
I want to add an automated grass cutting height mechanism.
I have never worked with lawnmowers but through basic googling know that most lawnmowers have simple mechanisms in wheels to change cutting height.
4 wheels = 4 mechanism sounds difficult.
Other option is to have axial movement of the blade to adjust cutting height.
One way is to raise complete drive ( cutting blade, central cutting motor, shaft connecting them etc), using servos, etc
Other way is to have special couplings between cutting motor and cutting blade. These special couplings will "couple" rotational motion but allow axial movement. (examples spline coupling, polygon coupling etc)
Spline couplings are more suited for shafts in horizontal plane rather than vertical. I am not sure of polygon couplings. Problem with both is I will need to add a bearings (flange type) and holding mechanism to the hold the bearing so that the blade does not just fall off.
All this seems to complicated.
Are there any other mechanism which will allow axial movement but couple angular motion without adding bearings etc?
Hope my query easy to understand.
Thanks in advance
I am trying to build (or at least conceptually) design a diy autonomous lawnmower.
I want to add an automated grass cutting height mechanism.
I have never worked with lawnmowers but through basic googling know that most lawnmowers have simple mechanisms in wheels to change cutting height.
4 wheels = 4 mechanism sounds difficult.
Other option is to have axial movement of the blade to adjust cutting height.
One way is to raise complete drive ( cutting blade, central cutting motor, shaft connecting them etc), using servos, etc
Other way is to have special couplings between cutting motor and cutting blade. These special couplings will "couple" rotational motion but allow axial movement. (examples spline coupling, polygon coupling etc)
Spline couplings are more suited for shafts in horizontal plane rather than vertical. I am not sure of polygon couplings. Problem with both is I will need to add a bearings (flange type) and holding mechanism to the hold the bearing so that the blade does not just fall off.
All this seems to complicated.
Are there any other mechanism which will allow axial movement but couple angular motion without adding bearings etc?
Hope my query easy to understand.
Thanks in advance