Difference between revisions of "Suitable mechanisms"
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Basically just a list of mechanisms that could be useful for future advanced [[diamondoid]] gemstone based nanosystems. | Basically just a list of mechanisms that could be useful for future advanced [[diamondoid]] gemstone based nanosystems. | ||
| − | Unlike in macroscale machinery with machine parts at the lowermost possible size limit there is no space for tiny screws | + | Unlike in macroscale machinery with machine parts at the lowermost possible size limit <br> |
| + | there is no space for tiny screws much tinyer than the parts to clamp together housings like gearboxes and such. <br> | ||
| + | Thus there is a need for designs that differ quite a bit from conventional designs. <br> | ||
| + | See design principles listed on the page: [[RepRec pick-and-place robots (GemGum)]]. | ||
| − | This also allows for interesting 3D printable mechanics that can cope without any metal screws. | + | Under the lens of this constrains a particular set of mechanisms/machine-elements emerges as especially promising. <br> |
| + | This page is a collection of such mechanisms. | ||
| + | |||
| + | These mechanisms also allows for interesting 3D printable mechanics that can cope without any metal screws whatsoever. <br> | ||
| + | A few big 3D printable screws suffice. | ||
== Related == | == Related == | ||
| − | * [[ | + | * Gear-bearings. Peculiarly the '''[[periodic table of gearbearings]]''' |
* The design principles listed on page [[RepRec pick-and-place robots (GemGum)]] | * The design principles listed on page [[RepRec pick-and-place robots (GemGum)]] | ||
| Line 15: | Line 22: | ||
=== Bearings and Gearings === | === Bearings and Gearings === | ||
| − | * conical/tapered gearbeaings | + | * '''conical/tapered gearbeaings''' |
| − | * | + | * '''conical/tapered ravigneaux gearboxes:''' https://www.flickr.com/photos/65091269@N08/51163799216 |
| − | + | * Wobblemotors: Moineau PCP pumps run partially in reverse with the core only rotating and the outside only wobbling | |
| − | * Wobblemotors: Moineau pumps run partially in reverse with core only rotating and outside only wobbling | + | |
| − | + | ||
---- | ---- | ||
| − | |||
* Turnbuckle: (but rather for length adjustment when load is displaced) https://en.wikipedia.org/wiki/Turnbuckle | * Turnbuckle: (but rather for length adjustment when load is displaced) https://en.wikipedia.org/wiki/Turnbuckle | ||
| + | * Differential screws: https://en.wikipedia.org/wiki/Differential_screw | ||
| + | ---- | ||
| + | * Rolamite (but modified to gearbearings): https://en.m.wikipedia.org/wiki/Rolamite | ||
=== Couplings === | === Couplings === | ||
| Line 28: | Line 35: | ||
* https://en.wikipedia.org/wiki/Coupling#Oldham | * https://en.wikipedia.org/wiki/Coupling#Oldham | ||
* '''linear rack gearbearing based oldham couplings''' | * '''linear rack gearbearing based oldham couplings''' | ||
| − | * | + | * (Schmidt coupling - see in the likely unsuitable section below) |
=== Joints === | === Joints === | ||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
* Hirth joints: https://en.wikipedia.org/wiki/Hirth_joint | * Hirth joints: https://en.wikipedia.org/wiki/Hirth_joint | ||
* Spline joints: https://en.wikipedia.org/wiki/Spline_(mechanical) | * Spline joints: https://en.wikipedia.org/wiki/Spline_(mechanical) | ||
---- | ---- | ||
| − | * fir tree | + | * fir-tree joints (generalization/optimization of dovetail joints) https://en.wikipedia.org/wiki/Dovetail_joint |
| − | * '''rotate extruded fir-tree-joints''' | + | * '''rotate extruded fir-tree-joints''' allowing for torsion or bending around a virtual axis |
---- | ---- | ||
| − | '''quick-release''' | + | '''For quick-release:''' |
| − | * Panic snap: https://en.wikipedia.org/wiki/Panic_snap | + | * '''Panic snap:''' https://en.wikipedia.org/wiki/Panic_snap |
* Snap shackle: https://en.wikipedia.org/wiki/Shackle | * Snap shackle: https://en.wikipedia.org/wiki/Shackle | ||
| + | ---- | ||
| + | Joints are useful for: | ||
| + | * self centering | ||
| + | * positive locking | ||
| + | * connection by form closure | ||
=== Chains === | === Chains === | ||
| Line 52: | Line 59: | ||
* Roller chains: https://en.wikipedia.org/wiki/Roller_chain | * Roller chains: https://en.wikipedia.org/wiki/Roller_chain | ||
* Gear teethed chains | * Gear teethed chains | ||
| − | * Attachment chains | + | * '''Attachment chains''' |
* Rigid chains: https://en.wikipedia.org/wiki/Rigid_chain_actuator | * Rigid chains: https://en.wikipedia.org/wiki/Rigid_chain_actuator | ||
| Line 66: | Line 73: | ||
* Parallel manipulator: https://en.wikipedia.org/wiki/Parallel_manipulator <br> The general principle. Not just the given example. Parallel SCARA, CoreXY, ... all parallel. | * Parallel manipulator: https://en.wikipedia.org/wiki/Parallel_manipulator <br> The general principle. Not just the given example. Parallel SCARA, CoreXY, ... all parallel. | ||
* '''successive onion shell peel-off tube-axle and bevel-gear serial mechanics principle''' | * '''successive onion shell peel-off tube-axle and bevel-gear serial mechanics principle''' | ||
| + | ---- | ||
| + | Special screwdrivers end-effector mechanisms that: | ||
| + | * put zero torque on the manipulated structure ("space screwdriver") | ||
| + | * decouple tensioning from unloaded screwing structure ports {{wikitodo|explain that principle more clearly with sketch}} | ||
| + | These screwdrivers end-effector mechanisms shall operate on "[[tension-force hydrants]]". <br> | ||
| + | See [[ReChain frame systems]]. | ||
| + | |||
| + | === Positive displacement pumps === | ||
| + | |||
| + | * PCP pumps: https://en.wikipedia.org/wiki/Progressing_cavity_pump | ||
| + | * conventional piston pump: https://en.wikipedia.org/wiki/Piston_pump <br> but operated like described on page [[vacuum handling]] | ||
| + | * ( Roots blower: https://en.wikipedia.org/wiki/Roots-type_supercharger ) | ||
| − | === Probably too many small pins === | + | === Probably too many small pins, too low stiffness, and better solutions present === |
* Sarrus linkage: https://en.wikipedia.org/wiki/Sarrus_linkage | * Sarrus linkage: https://en.wikipedia.org/wiki/Sarrus_linkage | ||
* Paucellier linkage: https://en.wikipedia.org/wiki/Peaucellier%E2%80%93Lipkin_linkage | * Paucellier linkage: https://en.wikipedia.org/wiki/Peaucellier%E2%80%93Lipkin_linkage | ||
* Schmidt coupling: https://en.wikipedia.org/wiki/Schmidt_coupling | * Schmidt coupling: https://en.wikipedia.org/wiki/Schmidt_coupling | ||
Revision as of 15:55, 17 May 2023
Basically just a list of mechanisms that could be useful for future advanced diamondoid gemstone based nanosystems.
Unlike in macroscale machinery with machine parts at the lowermost possible size limit
there is no space for tiny screws much tinyer than the parts to clamp together housings like gearboxes and such.
Thus there is a need for designs that differ quite a bit from conventional designs.
See design principles listed on the page: RepRec pick-and-place robots (GemGum).
Under the lens of this constrains a particular set of mechanisms/machine-elements emerges as especially promising.
This page is a collection of such mechanisms.
These mechanisms also allows for interesting 3D printable mechanics that can cope without any metal screws whatsoever.
A few big 3D printable screws suffice.
Contents
Related
- Gear-bearings. Peculiarly the periodic table of gearbearings
- The design principles listed on page RepRec pick-and-place robots (GemGum)
External links
Bearings and Gearings
- conical/tapered gearbeaings
- conical/tapered ravigneaux gearboxes: https://www.flickr.com/photos/65091269@N08/51163799216
- Wobblemotors: Moineau PCP pumps run partially in reverse with the core only rotating and the outside only wobbling
- Turnbuckle: (but rather for length adjustment when load is displaced) https://en.wikipedia.org/wiki/Turnbuckle
- Differential screws: https://en.wikipedia.org/wiki/Differential_screw
- Rolamite (but modified to gearbearings): https://en.m.wikipedia.org/wiki/Rolamite
Couplings
- https://en.wikipedia.org/wiki/Coupling#Oldham
- linear rack gearbearing based oldham couplings
- (Schmidt coupling - see in the likely unsuitable section below)
Joints
- Hirth joints: https://en.wikipedia.org/wiki/Hirth_joint
- Spline joints: https://en.wikipedia.org/wiki/Spline_(mechanical)
- fir-tree joints (generalization/optimization of dovetail joints) https://en.wikipedia.org/wiki/Dovetail_joint
- rotate extruded fir-tree-joints allowing for torsion or bending around a virtual axis
For quick-release:
- Panic snap: https://en.wikipedia.org/wiki/Panic_snap
- Snap shackle: https://en.wikipedia.org/wiki/Shackle
Joints are useful for:
- self centering
- positive locking
- connection by form closure
Chains
- Sprockets: https://en.wikipedia.org/wiki/Sprocket
- Roller chains: https://en.wikipedia.org/wiki/Roller_chain
- Gear teethed chains
- Attachment chains
- Rigid chains: https://en.wikipedia.org/wiki/Rigid_chain_actuator
For end-effectors and preceding
- Chucks https://en.wikipedia.org/wiki/Chuck_(engineering)
- Parallel plane fast acting grippers
- Vise like grippers: https://en.wikipedia.org/wiki/Vise
- Whippletree: https://en.wikipedia.org/wiki/Whippletree_(mechanism)
- Classical mechanical differential (for robot wrists): https://en.wikipedia.org/wiki/Differential_(mechanical_device)
- SCARA geomerty: https://en.wikipedia.org/wiki/SCARA
- Parallel manipulator: https://en.wikipedia.org/wiki/Parallel_manipulator
The general principle. Not just the given example. Parallel SCARA, CoreXY, ... all parallel. - successive onion shell peel-off tube-axle and bevel-gear serial mechanics principle
Special screwdrivers end-effector mechanisms that:
- put zero torque on the manipulated structure ("space screwdriver")
- decouple tensioning from unloaded screwing structure ports (wiki-TODO: explain that principle more clearly with sketch)
These screwdrivers end-effector mechanisms shall operate on "tension-force hydrants".
See ReChain frame systems.
Positive displacement pumps
- PCP pumps: https://en.wikipedia.org/wiki/Progressing_cavity_pump
- conventional piston pump: https://en.wikipedia.org/wiki/Piston_pump
but operated like described on page vacuum handling - ( Roots blower: https://en.wikipedia.org/wiki/Roots-type_supercharger )
Probably too many small pins, too low stiffness, and better solutions present
- Sarrus linkage: https://en.wikipedia.org/wiki/Sarrus_linkage
- Paucellier linkage: https://en.wikipedia.org/wiki/Peaucellier%E2%80%93Lipkin_linkage
- Schmidt coupling: https://en.wikipedia.org/wiki/Schmidt_coupling
