Lawn-Mowers TRIZ Cases

Curved cutting blades reduce turbulence to lower noise levels below 70 dB while maintaining grass cutting efficiency at lower rotational speeds.

Segmented metal rods replace nylon string in a ball-joint trimmer head, resolving the trade-off between thick brush cutting power and environmental pollution.

An adjustable support member with insertable coupling resolves frame complexity by enabling two distinct mowing heights without multiple configurations.

A brake pad biased by a spring maintains permanent contact with an annular brake disc on the drive shaft.

Pivotable cutter blades with pin protector recesses rotate around ground obstructions, preventing direct impact on fasteners while extending blade service life.

A mower uses a second motor to drive walking wheels and adjust cutting assembly height.

A movable cutter bar clears lodged debris by shifting away from the reel, then returns to position using elastic force.

A lawn mower adjusts cutter blade rotation and flap angle to optimize grass clippings distribution.

An asymmetric baffle design prevents cut grass stagnation while eliminating conspicuous streaks on mowing marks.

Rewinds a lawn mowing robot to an original mapping trajectory intersection point for precise position correction.

A hydraulic diverter valve redirects fluid flow between sub-circuits to maintain cutting unit rotational speed.

A central electric motor drives rear wheels through a gear transmission, reducing the frequency of motor usage and optimizing space between the wheels.

Floating adjustment apertures allow the mower deck to follow ground contours, preventing lawn scalping while maintaining precise height control.

A pivoting arm actuator repositions attachments on riding lawnmowers without stopping the machine.

A mower safety shield extends to block cutters from hitting obstacles.

A lawn mower shutter device adjusts its opening degree based on travel speed to vary air flow velocity and transport grass clippings.

A variable speed elevator control system adjusts transport velocity using real-time crop mass flow feedback signals.

A grooved post and wire latch enable precise gauge wheel height adjustment on multi-blade mower decks.

Housing protrusions guide debris away from the cutter blade to prevent accumulation while maintaining cutting efficiency.

Lockout mechanism physically blocks control grip translation to prevent accidental propulsion and conserve energy during manual operation.

A mower blade assembly uses a movable pin plate and biasing member to secure the cutting blade to the mounting plate.

A lawn striping mechanism uses a torsional restraining device to allow pivoting of the grass contacting member relative to the mobile support apparatus.

Independent front and rear wheel drive mechanisms prevent slipping on uneven ground by maintaining traction during backward movement.

Dual transmissions enable powered reverse motion in walk power mowers, eliminating manual effort on hills.

Detachable lithium battery packs replace combustion engines, eliminating exhaust emissions while maintaining high discharge power for large area mowing.

A grass trimmer uses a motor-driven spool and head housing to enable automatic line winding via a user-operable locking mechanism.

Heat discharge fins on the mount deck dissipate motor heat while soundproof sheets absorb solid propagation noise to improve operational performance.

Universal mounting plates enable transfer between machines while pivot arms adjust the deck from horizontal to vertical positions.

Periodic polarity switching prevents electrode polarization and corrosion, ensuring accurate rain detection for autonomous working systems.

Dynamic rod deflection increases the gap with the handle tube, resisting unloosening from torque loads that overcome static clamping forces.

Weight and pressure sensors adjust a lawn mower flap angle to prevent grass jamming and protect the cutter blade.

Adjusting pulley diameter ratios controls walking speed while maintaining fixed belt tension, resolving stability issues caused by ground friction.

Dynamic header speed adjustment maintains cut quality at high ground speeds while reducing wear and noise during low-speed operation.

A robotic lawn mower uses two independent rotatable cutting devices to trim grass near boundaries.

A finger assembly with a hinge mechanism allows multiple fingers to pivot and rotate independently on a single shaft.

A linkage arrangement connects front and rear frames via pivot joints to enable stable articulation.

Tuned mass dampers installed in gang mower suspensions reduce vertical bobbing to maintain consistent grass height and improve cut quality.

Composite nylon 6 formulations with metal stearate catalysts achieve controlled biodegradation while maintaining structural integrity.

Segmenting variable and maximum controls resolves the contradiction between ease of operation and device complexity in walk-behind lawnmowers.

A chore motor mounts sub-flush within a cutting deck to utilize blade-generated airflow for convective cooling.

A walk-behind lawn mower uses a cam and locking pin to pivot wheel pairs for height changes.

A wheel assembly pivots a rotating bracket to maintain dual wheel contact on uneven terrain, reducing operator discomfort and curb wear.

A bracket-mounted anti-rotation pin blocks handle rotation past safe limits, preventing contact with sensitive engine components during deck storage.

Interchangeable gear plates on a mower chassis resolve the trade-off between operational simplicity and structural complexity.

A cleaning system uses sensors to detect dirt on an autonomous mower and determines the appropriate cleaning method.

An auger compresses grass clippings before a separate cutting assembly chops them, preventing clumping and clogging during lawn mowing.

A retractable mower deck shifts cutting chambers to adjust width while an endless belt maintains continuous spindle engagement.

Gear reduction lowers blade tip speed to meet regulations while asymmetric mounting shifts weight distribution for easier pushing.

Universal magnetic coupling enables retrofitting auxiliary trimmers to diverse mower configurations while maintaining reliable power transmission.