Toothed Gearings TRIZ Cases

Uses existing input and output shaft clutches to add park lock in compact multi-speed transmissions without major gearbox redesign.

Localized magnetic field control enables wear-free torque transmission while limiting interference near sensitive vacuum or cryogenic components.

Applying the gearbox brake to reach a non-zero countershaft speed enables smoother crawler gear engagement with less noise, jerk, and stress.

A magnetized disc on a rod through the motor shaft enables direct gearhead output position sensing while shielding electronics from fluids and backlash.

Cooperating support portions split planetary shaft loading to reduce bending moment, improving planetary gear durability and reliability.

A notched friction ring and end-cap limiter create stable self-locking on a motor shaft while reducing installation difficulty and operating noise.

A linked friction clutch, locking clutch, and freewheel cut shift energy and space while enabling reverse torque transmission.

Dynamic engine torque limits based on wheel braking protect the front driveline in AWD differential lock without sacrificing uphill traction.

An elastic holding member absorbs motor tolerance variation and rattling, enabling smoother rotation in a compact retractable vehicle camera assembly.

Spring-loaded wedges and a cam remove gear play in a seat swivel reducer, stabilizing seat position and blocking reverse force damage.

Replacing belt drive with dual-motor gear reduction helps self-propelled snow throwers clear snow more efficiently in a smaller package.

Nested planetary gear sets and shared shifting elements deliver more forward ratios in less installation space for commercial vehicle transmissions.

A branched stopper plate arm and projected housing wall disperse rotational force, improving gear housing and stopper plate durability.

Timed power reduction across transmission state changes cuts backlash shock while preserving fast vehicle acceleration and deceleration response.

Nested planetary gear sets and combined shifting elements create 12 forward gears in less installation space with lower transmission complexity.

Coaxial motors with overrunning clutches provide redundant rotor drive, cutting propulsion noise and maintaining operation if one motor fails.

A side-by-side symmetrical motor layout combines cylindrical and bevel gears to shrink EV powertrain packaging while keeping independent wheel control.

A sun-ring gear train keeps power flowing through wheel displacement, removing CV joints while cutting unsprung mass and protecting motor durability.

Hypotrochoidal and epitrochoidal gear profiles raise contact ratio in planetary roller screws while avoiding thread interference, noise, and fatigue.

A planetary power-split layout with selectable gear connections cuts load-independent losses while keeping heavy-duty EV transmissions compact and common.

A remotely mounted motor uses shafts, bell cranks, flex shafts, or cables to deploy a vehicle step when direct motor mounting space is limited.

A dual-section clutch and urging mechanism lets a shift lever release and reconnect under external force while preserving stable operation.

A movable sensor cover is cleaned in a separate space to avoid residual spray, contamination scatter, and LiDAR sensing errors.

A control device synchronizes PTO gear changes by managing engine speed or shaft braking, cutting clutch stress during heavy implement start-up.

A four-shaft CVT with a drop set and few clutches enables CVP-only and split-path modes while meeting tight work vehicle packaging limits.

A frame-mounted engine with CV joints and flexible suspension keeps kart axle mass lower while maintaining stable off-road power delivery.

Planetary gears integrated into the drive sprocket enable motorcycle reverse operation with clutch-based control and fewer dedicated switches.

Selective dual-clutch gear engagement adds high, low, and reverse ranges while reducing CVT belt strain and torque interruption in off-road vehicles.

Alternating piston-driven rotation is converted into steady one-way drilling torque to reduce stalling, pressure fluctuation, and motor failure.

A movable ring gear shifts the wheel hub reducer between reduction and direct drive, cutting fuel use when torque demand is low.

A modular planetary gearbox combines primary, reversing, and intermediate stages to deliver 28 gears in less installation space and lower complexity.

Torque sensing and cam indexing detect dog clutch stiction and high angular velocity to enable faster, safer sequential shifts.

Joining protrusions and hub recesses guide ring-gear assembly, cutting tooth gap noise, wear, and manufacturing difficulty.

A nested planetary gear train and torque selector add neutral, high, and low ratios to a heavy-vehicle differential without enlarging the assembly.

A rotor case with outer tooth grooves transmits output directly to a gear, cutting motor axial size without external transmission gears.

Nested planetary gear sets with a reversing unit and intermediate gearbox expand forward gears while cutting installation space and complexity.

A resin worm wheel with a larger pressure angle than the steel worm stabilizes engagement, reducing load fluctuation and control error.

A spring-biased retractable pin aligns washers, pinion gears, and needle rollers while limiting unintended assembly forces and damage.

A control device adjusts HST swash plate output during stage shifts to keep vehicle speed stable and reduce transmission path load.

Short-stroke coupling sleeves speed planetary gearbox shifting while reducing wear, stress, and reverse-gear weight in vehicles.

A split-power transmission varies compressor speed through a speed-summing gear and CVT, avoiding bulky variable frequency drives.

A sealed multi-joint roof carrier lifts and rotates to load long or heavy cargo without contacting vehicle curves, while keeping a clean exterior.

Compressed-air actuation shifts an integrated wheel hub epicyclic gearset to match heavy-vehicle load conditions and improve fuel efficiency.

A recessed upper sun gear and bearing-supported lower shaft keep stacked planetary gears aligned, reducing vibration and uneven torque.

A planetary drive sprocket assembly adds motorcycle reverse control using sensor-based gear engagement to improve low-speed maneuverability.

Separating the rotor and sun gear simplifies clutch manufacturing, enables better material choice, and lowers inertia for faster response.

A movement restriction portion blocks clutch-side sliding of the state changing unit, cutting wear and drag loss during engagement shifts.

A rack-driven steering apparatus uses a ball nut to transmit force directly to the rack bar.

A ball screw sleeve uses angularly offset push grooves to convert rolling element linear motion into rotary torque.

A planetary gear train design using four gear sets and seven control elements to achieve ten forward speed stages.

A worm gear incorporates a flexible shaft with dual spring constants to absorb radial displacement from manufacturing tolerances and environmental changes.

A transmission brake launch system locks the output shaft via clutch engagement to hold vehicle torque.

Compound planetary gear set with motor decouples pump speed from engine rotation, maintaining optimal alternator efficiency and reducing weight.

Inverted gear configuration increases contact ratio, confining mesh noise and preventing foreign substance interference within the transmission assembly.

Feedback control adjusts hydraulic pressure to compensate for friction wear and tolerance stacking, ensuring uniform shifting element disengagement.

Four planetary gear sets and torque transmitting devices establish multiple forward and reverse speed ratios while reducing transmission weight and volume.

Inclined abutment projections on multistage transmission gears prevent excessive local loads on engaging pawls during speed shifting.

Integrating separate control valves into one assembly reduces device volume and weight while maintaining precise hydraulic pressure regulation.

Integrating no-load and direction change grooves into the nut body eliminates external end caps, reducing volume and complexity while maintaining reliability.

A sliding auxiliary device uses a toggle mechanism and elastic member to assist wheel rotation.

A vehicle automatic shift device adjusts sleeve push force to detect gear engagement status via stroke sensor feedback.

Four planetary gear sets and nine shafts deliver power in an automatic transmission, resolving the trade-off between shift stages and component weight.

An eccentrically oscillating speed reducer uses an inter-crankshaft gear with outer teeth meshing at the middle portion of crankshafts.

A differential gear design uses optimized pinion and side gear parameters to achieve a compact configuration with improved strength.

Notched reverse side faces on fishing reel gears prevent contact between opposing tooth surfaces, suppressing wear and maintaining rotation performance.

A planetary gear train design achieves eleven forward speeds using four shared gear sets and seven control elements.

A backlash eliminator aligns pressing force with cutting load direction to reduce friction in gear trains.

Segmenting the drive transmission unit reduces noise and runout while minimizing weight and size for easier attachment.

A torque converter and shiftable mechanical lock transmit rotational power to industrial equipment during initial acceleration phases.

Internal key and slot guide restricts nut rotation, eliminating external torque resistance features that increase manufacturing complexity.

Segmented planet gears with elastic rotation absorb transient shock forces, preventing uneven wear and extending service life in compact gearbox designs.

Hydraulic synchronizer and electronic controller limit torque during disengagement to reduce mechanical wear.

Floating gears engage via friction synchronization and mechanical locking to maintain continuous torque during gear shifts.

A transmission clutch system disengages motor drive during blade blockage to protect internal components.

Four interconnected planetary gear sets enable ten forward speeds while reducing transmission volume and weight.

Nested planetary gear sets reduce transmission length and component complexity while improving fuel economy.

Non-shared driving gearwheels on dual input shafts reduce axial length, balancing stress distribution to improve stability across vehicle models.

A planetary gear transmission design separates gear ratio function from centering and securing functions using an outlet member to preload the bearing.

A worm reducer design adjusts gear lead angles to increase module size and reduce center distance.

A winch-winding assembly uses a gear system and pivotable engagement arm to rotate flatbed winch drums via hand-held drills.

A work vehicle transmission uses forward and reverse couplers to manage gear engagement for seamless direction changes.

A transmission system uses a coaxial drive shaft and countershaft arrangement to reduce overall length and weight in electric hand tools.

Sequential quenching of rack bar teeth and screw portions prevents warping while maintaining manufacturing efficiency.

Nested planetary gear sets reduce transmission length while securing a gear ratio span greater than 10.01, improving fuel economy and drivability.

A multi-planetary gear transmission system uses shared friction members to achieve multiple shifting steps.

Partial cycloid gear teeth balance bending and compressive strength, resolving manufacturing precision requirements while enhancing load capacity.

Parallel drum arrangement reduces housing thickness while maintaining cable tensioning stability.

A wheel hub transmission uses a planetary gear arrangement and clutching device to manage torque distribution at the drive axle.

Merging two planetary gear sets reduces transmission weight and volume while maintaining multiple gear ratios through selective clutch engagement.

A webless planetary gear set uses radial bearing bodies between coaxial housing parts to guide rotating components.

Segmented press-fitting parts resist radial expansion of the sun gear under axial load, reducing friction and noise while maintaining alignment precision.

Segmenting the linear actuator into three modules reduces assembly time by eliminating complex multi-step motor gear integration.

Nutating wobble plate gearing minimizes friction losses while maintaining high gear ratios within compact volumes.

Increasing frictional transmission capacity synchronizes positive-locking elements, enabling uninterrupted traction and high comfort without extra hardware.

Composite support yoke with embedded metal reinforcement prevents free movement increase and noise generation during vehicle operation on uneven surfaces.

Dynamic threshold values derived from ambient pressure measurements compensate for altitude variations, ensuring precise state detection.