Dual Gear TrainParallel gear trains To prevent moments

A1 Two separate but equal gear trains operate parallel to each

other to allow equal distribution of torque on the end axle.

This can also reduce potential stress within the axle.

If the mass is directly underneath the center of mass / gravity, then it prevents moments from being created.

If gear trains can act independently, then the mass and torque can be split to increase overall speed it is lifted

Dual Gear TrainPros:

- Equal spread of forces- Linear design means cancellation of forces- Mass hanging under center of gravity / mass

Cons:- Gearbox length

- Maximum axial length of the gearbox is a cubed denominator

A2

Parallel gear trains To prevent moments

Two speed gearboxMass is lifted faster after momentum is made

After the mass has been lifted and is accelerating, the second gear with faster speed will start to slowly take over the control of the axle, bringing it up faster.

If at any point the faster gear is unable to take it, the axle will be pushed along by the slower gear with higher torque.

This would require a system where two different speed gears are able to automatically take control over a single axle by itself.

B3

Two Speed GearboxMass is lifted faster after momentum is made

Pros:- Reduces the time taken to lift the mass.- Could lift a heavier mass in the same time as a light mass in a different gearbox- Automatically shifts based on the physical interactions within the gearbox

Cons:- Very difficult to produce- Time gained may be miniscule- Would work better in a horizontal plane compared to a Vertical plane.- Gears may get stuck, faster gears may break

B4

Compound Planetary Compact and Modular Gear Reduction

Size: 70mm dia. X 9mm width (subject to change)

Each planetary gear multiplies the torque by a small amount while also reducing the axial length.

Each subsequent compound planetary multiplies it exponentially until it reaches required torque to lift mass.

Example shown has a 3 gear teeth sizes: 15, 30, 75If you have 1 planetary gear; 5:1

2 planetary gears; 25:13 planetary gears; 125:1

Optimal size could be found if best mass and time values are known

C5

Driving Pinion

Compound Planetary Compact and Modular Gear Reduction

Pros:- Compact Size- Distributed Forces- Reduced Wear- Symmetrical and Aesthetically Pleasing- Modular and Modifiable

Cons:- Tolerance of Parts has to be very accurate- If one component gets caught, it is hard to fix- Central Driving gear is smaller compared to Planets- Increased complexity which may cause problems

C6

Spiral CompoundReducing size by changing direction of gears

To reduce size of the gearbox, the gears are not placed in a linear fashion.

If gears are placed in one plane of motion, then the forces acting on the system will be acting in controlled directions.

Gears could spiral around the bolt fixture.

String could wrap around the bolt or the axles to reduce effort needed to pick something up.

D7

Spiral CompoundReducing size by changing direction of gears

Pros:- Compact Space- Mass is lined up vertically with the bolt- Symmetrical design

Cons:- Only a few specific gear ratios would work to fit the Bolt in the centre- Would have to have at least 3 - 6 gears - The Gearbox may swivel around the bolt- The bolt thread may damage the gearbox.

D8

SHared Axle Systemcompact compound linear system

The shared axle system requires only two axles which have series of compound gears. The sets of compound gears interact with each other but are not fixed to the axles.

Only the final gear on the system is fixed to the axle so that the axle rotates at the required speed.

E9

SHared Axle Systemcompact compound linear system

Pros:- Compact- Simple design to produce- Linear design

Cons:- Possible increase in friction- Creating mounting point where the system is

balanced- Gears may need spacing to reduce Friction between

gear faces

E10

CHOSEN CONCEPTShared axle System

E11 Adjustments we may make:

- Move the string around- Change Gear Ratio- Change number of gears- Move Motor- Change how string is

attached- Creating better spacing

between gears- Create supports for axles