Wheel Based Transmission TRIZ Cases

Resilient snaps and hooks let a ride-on toy seatback lock into multiple hole sets, fitting different child sizes without a complex mechanism.

A hollow one-piece plastic seat with integrated rear conduits cuts vehicle cost while supporting ergonomic, multi-activity mobility.

ECU-driven motor rotation primes a mechanical oil pump in neutral or clutch-off states to prevent startup oil starvation in the transmission and clutch.

A spline-fitted output gear transfers reduced torque directly to the wheel, reducing clearance errors and stabilizing electric scooter rotation.

Deformable rolling elements let a cycle gear motor shaft self-center under load, reducing torque imbalance, noise, and vibration.

An internal hood fixes the stator to the hub shaft and aligns the gear set coaxially to boost starting force, cut kinetic loss, and reduce jitter noise.

A fixed-ratio hub gear train separates torque paths to keep chain tension low, enabling smoother motor-assisted shifting and less wear.

One-way bearings isolate pedal and motor power paths in a mid-drive gearbox, cutting friction losses and preventing pedal interference.

A positive-connected stator ring and internal gear cut hub drive bulk, parts, and cost while maintaining durable torque transmission.

A one-way bearing rear wheel lets a lighter electric scooter roll quietly without power while keeping driven propulsion when needed.

Electric actuation and Hall sensing let an internal bicycle gear hub combine manual and automatic shifting with precise, low-resistance gear changes.

An integrated hub motor and transmission enables seamless bicycle gear changes without pedaling interruption while reducing weight and energy loss.

An electric motor and drive shaft fit within the original engine layout, keeping motorcycle styling and gear transmission intact.

A flange-and-disc clutch with teeth and hooks cuts rear wheel noise and part count while maintaining durable torque transfer.

Hooks engaging toothed clutch surfaces cut rear wheel part count, radial forces, and disengagement noise while maintaining durable torque transfer.

Coaxial one-way devices and plastic shaft sleeves simplify e-bike transmission assembly, reduce wear, and cut weight while preventing gear sticking.

A modular hub drive swaps internal transmission parts for splined direct-drive coupling, cutting hub weight while preserving cassette flexibility.

Reusing a petrol bike chassis, this case shows how battery placement and airflow cooling enable lower-cost electric conversion without changing the look.

A cam-and-lever torque transmission layout cuts shifting force and smooths gear changes in a compact e-bike multispeed drive unit.

Split PCBs around the hub axle enable compact magnetostrictive torque sensing, lower motor interference, and better heat dissipation.

Separate hard ratchet rings, overlapping bearings, and a spring-damper layout improve bicycle hub durability, engagement, and serviceability.

A hub generator recharges the storage element from wheel motion, keeping electric gear switching available without frequent battery replacement.

Reciprocating cranks and step-up shafts move drive into the rear hub, removing the bottom bracket and improving torque transfer.

Localized support at the shift ring contact region strengthens a lightweight bottom bracket gear housing and reduces shifting noise.

One-way bearings isolate pedal and motor power paths in a mid-drive gearbox, reducing frictional loss while allowing combined drive.

A hollow tube links the hub motor shafts and brackets to close sealing gaps, blocking water and dust ingress and extending service life.

A hollow sealing tube closes shaft and bracket gaps in a hub motor, blocking water and dust ingress to extend service life.

An integrated motor, reduction gear, and control unit enable smooth hill-load shifting, oil retention, and regenerative braking in e-bikes.

Integrated hub sensors, actuators, and an electric interface enable gear shifts under pedal load while cutting friction and weight.

A centrifugal drive assembly shifts by output speed instead of pedal cadence, cutting high-speed gear hunting and extending transmission life.

Magnetic attraction and repulsion replace complex hub gear actuators, cutting part count, weight, and cost in clutch control.

An independent cassette flywheel, limiting sleeve, and anti-rotation piece let an e-bike hub motor wheel be removed quickly without special tools.

A nested planetary and idler gear layout boosts hub motor torque without a larger motor, improving acceleration and climbing in lightweight vehicles.

Splitting a motorcycle drive into two wheel-side motors improves handling, frees battery space, and supports better waterproof sealing.

A hollow shift drum houses the electro-mechanical actuator to cut axial installation space and keep a micromobility gearbox compact.

A pivot-carrier gear train uses the starter motor to reverse heavy motorcycles while preventing simultaneous forward and reverse drive.

Direct heat conduction through an extended motor housing wall cools a sealed e-bike drive, sustaining output and motor life.

Fixing the stator to the hub shaft improves gear concentricity, boosts initial hub torque, and reduces kinetic loss and jitter noise.

Motor forward and reverse rotation drive two one-way clutch stages, cutting EV transmission parts, wiring, and package space.

Multiple torque-transmitting teeth improve pedaling torque transfer from the rear sprocket to the hub while fitting a constrained opening.

A starter motor and meshed gear train provide reverse movement for heavy motorized vehicles while interlocks prevent forward and reverse engagement.

A fixed-ratio rear hub and drivetrain cut chain tension during motor-assisted shifting, reducing wear, rough shifts, and damage.

Stored spring energy enables more instantaneous gear shifts under rider torque, reducing torque loss and improving shift reliability.

An intermediate material in the gear housing joint reduces electrode potential differences to prevent galvanic corrosion and extend component life.

A one-way clutch decouples the ring gear when the motor stops, cutting hub gear noise and damage while supporting throttle and PAS modes.

Directional drag members and epicyclic gearing keep free-coaster hub slack stable, preventing accidental drive engagement during coasting.

A removable rod and rotating gear cartridge let vehicle drivetrain ratios be changed quickly without disassembling the frame.

A ring-gear transmission lets a smaller hub motor boost torque for quicker acceleration and better climbing in lightweight vehicles.

By moving the drive sprocket inward of the output gear, this power unit cuts chain line protrusion and shrinks EV width and transmission size.

A longitudinal motor in a hub-mounted gearbox cuts noise, weight, and bulk while keeping children vehicle wheel transmission stable.

A compact off-the-shelf motor and planetary gearing cut hub motor weight and cost while delivering practical drive torque for ride-on vehicles.

A removable internal hub component lets riders move one cassette between wheel sets using a single lock ring tool, cutting cost and setup hassle.

A pedal-driven spherical body combines tires, paddles, and gliding wings to overcome multi-terrain transition limits on land, water, and in air.

Coordinated clutch timing in a bicycle gearbox prevents intermediate gears and idling during direct shifts, improving shift accuracy and rider stability.

A selector shaft with shuttle, worm drive, pawls, and ball piston simplifies mobility gear shifting while cutting parts, assembly effort, and cost.

One-way clutches in a power-split e-bike driveline decouple control and assist motors to cut heat, energy loss, and generator damage.

An electric control assembly switches the planetary gear path inside the bicycle hub, replacing labor-intensive manual shifting with precise operation.

Load-shifting clutches and a CVT let a bicycle transmission change ratios under pedal load while reducing friction losses and weight.

A shift actuator aligned with control pawl closure cuts resistance and labor in high-to-low bicycle gear hub shifting.

Stored spring energy moves the shift element quickly, cutting torque loss and improving shift precision in pedal-assist multispeed vehicles.

Axially spaced inner clutches free radial space for two planetary gear stages, expanding pedelec transmission ratios without extra actuators.

An in-shaft cam and electric shift motor move a meshing component radially to save space, smooth gear changes, and avoid transmission lock-up.

Slider blocks in a CVT drive pulley constrain spider-sheave rotation to cut wear, prevent backlash, and improve power transfer.

A flexible pin-retaining ring and guided pin path spread torque across engaged teeth to cut surface pressure, wear, and drive complexity.

A dynamometric pinion, free-rotating bearing, and planetary gearbox add discreet e-bike assist while limiting wear, axis breakage, and wheel spin.