Wheel Based Transmission TRIZ Cases

An offset-axis parallel stage ahead of the planetary gear cuts torque load, improving durability and shift-under-load efficiency in bicycles.

Overlapping planetary gear units cut bicycle transmission axial and radial size while preserving stepped transmission stage switching.

A coaxial motor and planetary gear layout enables compact pedal transmission, smooth shifting under load, and lower energy loss.

A centrifugal clutch and composite planetary gear ring enable compact three-speed bicycle auto shifting with lower weight and cost.

A nested clutch with elastic and magnetic actuation stabilizes gear engagement under pedaling oscillation, reducing wear and reverse resistance.

Unevenly spaced pawls and ring deformation sensing improve bicycle drive force measurement by reducing radial-force interference in freewheels.

Serial ratchet control rings coordinate planetary stages in an internal derailleur to prevent temporary shifts, lower torque, and simplify manufacture.

Three coaxial planetary gear sets and five shift elements deliver at least six bicycle gears while cutting bottom bracket installation space.

An integrated machine gear and two-part transmission enable smooth bicycle shifting under load while improving weight distribution and reducing drivetrain complexity.

Three coaxial planetary gear sets and interlocking shift elements expand bicycle gear range while limiting installation space and component loads.

Planetary gears, brakes, and freewheels enable bicycle powershift gear changes with uninterrupted traction and no complex clutch operation.

Polymer contact surfaces in a coaxial cycle gear motor cut metal contact noise, vibration, wear, and friction torque in a compact reducer.

Drive-shaft rotation moves the selector to shift a two-wheeler gear unit under load without interrupting power flow or requiring high cable force.

A worm screw and shuttle replace cable controls in a compact gear shift mechanism, reducing adjustment needs while keeping gear engagement precise.

A breather passage releases housing pressure in any orientation to prevent seal leaks, contamination, and premature driveline wear.

Non-parallel gear axes add friction damping to cut bicycle drive noise while enabling a higher gear ratio or more compact packaging.

By overlapping winding transmission bodies across planetary units, this gear structure reduces axial length while preserving speed reduction and speed-up functions.

An annular support rotates coaxial gear pairs into take-off position, enabling compact ratio changes with lower stress and easier vehicle integration.

A two-stage stepped planetary gear set expands bicycle and pedelec gear options while cutting construction effort, loads, and losses.

A two-stage stepped planetary bottom bracket gearbox delivers 12-speed shifting with lower component loads, compact packaging, and high gear efficiency.

An integrated two-stage planetary bottom bracket expands gear ratios while lowering component loads and improving toothing efficiency.

A machine gear placed between two sub-transmissions enables load shifting, better weight distribution, and a compact e-bike drive.

Relief contours and encapsulated lubrication help an e-bike cycloidal gear cut heat, noise, wear, and mass while maintaining torque transmission.

Using two brakes and two freewheel clutches, one planetary bicycle gearbox delivers three ratios with lower complexity, cost, and space use.

A planetary speed increaser cuts torque before it reaches the bicycle transmission, reducing load while keeping the component axially compact.

A planetary bottom bracket gearbox decouples the motor to cut drag torque while enabling no-load gear changes in electric bicycle drives.

Unequal pawl spacing creates a pawl-free ring section that limits radial-force interference and improves transmitted drive power measurement.

A single transmission shaft with selective pawl engagement replaces multiple gear-coupling shafts, saving space and reducing manufacturing time.

A single centrifugal block coordinates clutch rotation so bicycle hub gears shift sequentially without overshifting or skipping intermediate ratios.

A one-piece radial blocking system keeps gearshift pawls in place, cutting part count and eliminating precise cable adjustment.

A single-piece radial lock holds multiple pawls on the selection shaft, cutting clip force, wear risk, and assembly complexity.

Controls clutch timing and switching speed in bicycle gear changes to avoid intermediate gears and free-pedaling during shifts.

Drive-shaft torque moves the switch element during shifting, enabling two-wheeler gear changes without interrupting power throughput.

A retaining-member clutch for planetary torque transmission enables coupling and disengagement under load while reducing lockup risk.

A cam-driven pawl mechanism locks selected gears to a hollow shaft, enabling enclosed e-bike shifting with lower unsprung mass and less maintenance.

A two-stage planetary shift group uses brakes and a clutch or freewheel to cut construction effort while preserving compact, efficient bicycle gearing.

By moving the motor from the rear hub to an enclosed gearbox near the crank, this case cuts unsprung mass and derailleur maintenance.

A spring-actuated pawl engages only at a defined shift drum angle to prevent repulsion, rattling, wear, and slow gear shifts.

An eccentric cam and Oldham-joint gearbox cuts e-bike drive size, weight, friction, and noise while preserving high torque reduction.

A rotary transmitter shifts pins between inner and outer gear teeth to raise torque density, limit play, and keep the drive compact.

An enclosed conical transmission at the bottom bracket protects gears from debris while enabling wide-ratio shifting under load with low maintenance.

An internal cam and spring-ring pawl layout enables smooth gear shifts while improving durability and reducing unsprung mass in e-bikes.

A torque-proportional roller clamping CVT expands bicycle ratio range, cuts maintenance, and supports regenerative braking in e-bikes.

A coaxial dual-planetary transmission keeps e-bike motor assist active during gear changes while reducing parasitic torque and bulk.

A frame-mounted e-bike powertrain uses torque sensing and enclosed gearing to cut rear unsprung mass, maintenance, and exposure to dirt.

A stepping clutch and guiding-trench lever reduce direct sun-gear resistance, cutting shift force, weight, and lever wear in e-bikes.

Strain gauges on load-cell flaps and encoder-based correction improve bicycle spindle force measurement accuracy while resisting drift and exposure.

A radially shifted pinion engages concentric gear rings to replace derailleurs, enabling compact, durable bicycle gear changes and electric actuation.

A one-piece planet carrier ring and sun gear cuts part count, axial length, weight, and noise in multi-stage wheel hub drives.

A cam-actuated axial clutch in a bicycle hub gear reduces friction during shifts, enabling smoother shifting under load with lower maintenance.