Gearboxes TRIZ Cases

A radially inward housing passage guides oil by gravity instead of a separate pump, cutting transmission space and assembly cost.

Centrifugal force and rotor wind spread oil through a shaft, spreader, and carrier to lubricate central motor bearings with less pump demand.

An overlap between primary and intermediate teeth locks the axially displaceable gear in engagement, preventing jump-out without added bulk.

A coaxial reduction unit and housing layout balances radial and moment loads in construction machine actuators while keeping the transmission compact.

Routing the oil temperature sensor wire between rotating elements keeps the connector at the case top without increasing case size.

Axially offset torque support arms create a righting moment that counters gearbox tilt, reducing cyclic bending and uneven gear loading.

Replaceable wear sleeves in gearbox shaft bores absorb bearing wear, cutting repair time and extending case life without repeated material removal.

A fluid restriction wall beside the pinion traps axially pushed oil, increasing oil lift to the large gear top and improving lubrication.

A planetary gear layout and barrier rib raise reduction ratio in limited steering space while preventing motor interference and grease damage.

A planetary gearbox drives both the propulsor and accessory loads, improving aircraft propulsion compactness, lubrication reliability, and efficiency.

Separating mechanical and electric oil pumps onto different support walls improves stability while avoiding added axial length in the transmission case.

A gearbox efficiency rating links oil flow, fan diameter, and thrust to simplify geared turbofan gearbox development and selection.

An oil isolation plate separates the oil holding space from rotating gears, cutting agitation loss and improving EV transmission efficiency.

Funnel-shaped inner ribs and an external bore collect splash oil and feed bearings while avoiding undercuts and preserving gearbox housing stiffness.

Ribbed inner walls, a conical sealing surface, and a double-wall housing cut material use while improving stiffness and oil leakage protection.

A pressure-triggered auxiliary pump keeps gearbox oil flowing during in-flight shutdown and windmill conditions to prevent wear.

A modular hinge with mid bar, flap bars, and couplers enables in-folding and out-folding while reducing panel stress and crack risk.

Internal channels and grooves route lubricant by gravity, capillary action, and centrifugal force to cool gearbox bearings and seals.

Using only 1-30% grease in a food-machine gear space enables non-food lubrication, limiting fiber abrasion and grease leakage.

Strategic ribs join worm and wheel bearing fittings to suppress gear housing deformation, reduce motor vibration, and improve assist durability.

Integrated barrier deflectors in a two-shell transmission housing guide lubricant away from the bearing to reduce leakage and projection.

A motor-driven rack gear and sliding housing let a flexible display expand for larger viewing while retracting to keep the device compact.

Aluminium or copper alloy journal bearing coatings cut friction and power loss in aircraft gas turbine gearboxes while supporting larger fan systems.

A coaxial venting channel at the input shaft uses centrifugal force to keep oil out, relieving gearbox pressure with less maintenance.

A Bezier-defined flex spline and two-point wave generator cut backlash and weight in strain wave gearing while lowering manufacturing cost.

Transfer gears on the planet carrier or ring gear power aircraft accessories while shortening axial gearbox packaging.

A bidirectional hinge with flap bars, couplers, gears, and rounded edges enables in-folding and out-folding while reducing panel stress.

By merging the cooler housing with the transmission cover, this case cuts interfaces, material use, and assembly effort.

A raised bead in a gearbox housing replaces separate reinforcements, enabling flexible bushing placement and lower manufacturing cost.

Offset eccentric regions and roller-cage contact deliver high reduction and torque while minimizing imbalance, noise, and wear.

Controlled-flex mounts and couplings absorb turbine gearbox movement, reducing misalignment, eccentric loading, and gear wear.

Integrated stiffeners lock worm and gear engagement under torque, helping plastic-housed adjusters hold position under external load.

Multi-level seals in gear selector plug-in connections improve hydraulic tightness, cut mounting force, and prevent leak-causing tilt moments.

An external suction-side canister filter cuts sump vertical packing while maintaining work fluid filtration in compact e-transmissions.

A split sun gear with a single-piece ring gear cuts radial envelope and fretting while improving power density in turbine engine gearboxes.

Axially offset eccentric regions and radially free rollers raise transmission ratio and torque while minimizing dynamic imbalance.

A two-stage oil reservoir and drain layout stabilizes passive bearing lubrication in transmissions despite speed changes and oil sump variation.

Angled, bolt-on deflector segments block debris from final drive joints and seams, reducing hardware damage and maintenance downtime.

A hollow actuator with an internal planetary reducer cuts wearable hip-assist volume while supporting smooth walking motion under clothing.

By adjusting bull and pinion pitch diameters, this gearbox keeps impeller speed and center distance constant across AC power frequencies.

A nitrided shaft surface boosts wear resistance in a speed changer pin while keeping the threaded end softer to prevent damage under load.

Proper gutter volume ratio and flow control improve gearbox lubricant scavenging, reducing windage, friction, heat buildup, and excess weight.

Additional ribs around the ring and non-fastening boss balance molten metal flow, reducing casting cavities and improving case yield.

Bladed planet gears drive oil axially to the differential and spider gears, improving lubrication without a pump at low speed and high torque.

By shifting the parking lock into an axial gear layout, this case reduces lateral and height growth in integrated drive units while preserving stability.

An eccentric dual pinion and ring layout delivers high-ratio torque transfer in a compact gear package while reducing weight and power loss.

A rotating carrier bails oil from a sump to lubricate and cool the gear reduction assembly without a dedicated gearside pump.

During hard acceleration, controlled oil transfer lowers gearbox churning and heat losses while preserving lubrication in EV transmissions.

Aluminium or copper alloy bearing coatings cut friction and power loss in aircraft gearbox planet gears while limiting weight growth.

By overlapping the seal with the main bearing region, this speed reducer cuts oil storage and weight while maintaining sealing and lubrication.