Controlled Members TRIZ Cases

An integrated external gearbox actuator uses lugs, a shift fork, and spring assist to cut shift force, wear, and integration complexity.

Pre-assembled sleeve grooves, gaps, and an installation brake simplify transmission actuator alignment while reducing installation complexity.

Inward lobes on an arch-shaped shift fork passively drip oil to sleeve engagements, cutting friction and heat without sprayers.

A switchable coupling links shift elements so a rotating shift drum can reach neutral without traction interruption or limited drum rotation.

An eccentric coupling arm and longitudinal guide simplify semi-automatic transmission assembly while preventing tilting loads on actuators.

A rotating drum and positioning grooves let one motor actuate parking lock and dog clutch engagement, cutting HEV transmission cost and power use.

A cam-and-pin interlock locks one gearbox fork lever in neutral while the other shifts, preventing simultaneous engine and electric ratio changes.

A cage-guided shift drum with a closed groove and shared fork guidance saves axial space while keeping gearbox shift positions precise.

Multiple swingable bushes distribute shifter load in a speed reducer to limit heat and abrasion while maintaining reliable gear engagement.

Integrated rack-and-pinion actuation with a sensor target improves shift fork pivot feedback and alignment in disconnect clutch systems.

An eccentric-pin cam and rolling element improve small-angle shift fork motion, cutting backlash, wear, and engagement error in transmissions.

An elastic element between the inner shaft and outer hub absorbs tooth-to-tooth engagement force to prevent shift motor stalling and burnout.

A support stem and sleeve projection stop engagement pin posture change, cutting sliding resistance and easing dog tooth load during shifting.

An elastic element between the inner shaft and outer hub absorbs tooth-to-tooth axial force, preventing shift motor stall and burnout.

A state-machine backlash correction approach keeps selector fork positioning accurate despite actuator hysteresis, wear, and assembly tolerances.

A 3D Hall sensor tracks shift fork position despite pivoting, rotation, wear, and mechanical play in transmission actuators.

A ring between sleeve and shift fork spreads contact load, lowering surface pressure and suppressing shift fork wear during gear selection.

Symmetrical guide shafts beside the ball screw keep the shift fork sliding straight, reducing pinching, friction, and poor shift quality.

A single axial shifting fork engages multiple transmission elements to combine gear and park states with fewer actuators and simpler control.

A sliding pin and protrusion on one shift rail combine rotary and sliding motion, cutting transmission part count and size.

Stored backlash values and state-machine direction signs correct actuator hysteresis to keep selector fork gear positions accurate and reduce wear.

An axial oil path and partial boss depression feed oil directly to the shift fork, improving lubrication while reducing machining complexity.

A spring-biased slider guides the shift fork to keep lost-motion engagement reliable while cutting axial space and shift force.

A translating intermediate arm and tertiary shaft improve gearbox fork positioning by limiting deformation and avoiding inverted motion.

One electric motor drives both transmission actuation and oil pumping through a clutch, cutting component count, cost, and packaging complexity.

A side-mounted clutching assembly lets adjacent transmission gearwheels share one operating lever, shortening the lay-shaft and saving space.

Sensors, a controller, and an actuator coordinate gear shifts with motor speed to match drill bit size and material during core drilling.

A spring-biased pivot arm blocks simultaneous gear engagement while reducing shift-fork friction and supporting faster transmission shifting.

An eccentric-pin rolling element drives small, accurate shift fork motion while reducing gear-train backlash, wear, and engagement delay.

A nested connector layout lets one actuator selectively drive multiple shift forks, cutting gearbox space and component count.

A modular lever-linked actuator converts linear shaft motion into shift fork rotation, cutting packaging space, weight, and complexity.

A boss oil hole and depressed guide channel feed the shift fork sliding portion directly, easing machining while allowing a thinner transmission fork.

Grooved shift rods and lock pins block unintended forward or reverse selection while easing gearbox assembly, repair, and range unit replacement.

A shared drive and switching mechanism lets forward gears and P-gear operate without interference, cutting transmission complexity, energy use, and leakage risk.

Calibrated punch and die radii counter springback in sheet metal bending, enabling precise single-piece parts without welding or cracking.

Individually swingable bushes and lubricant-fed surface contact keep a speed reducer shifter engaged while limiting heat and abrasion.

A deformable sleeve secures the shift fork and nut body, transmitting tilting forces without extra fasteners and simplifying ball screw manufacture.

A guided reverse lever and base member split dual-end assembly, making shift fork module installation easier and reverse gear engagement more stable.

A magnet and 3D Hall sensor detect shift fork position through linear and pivoting motion while resisting errors from play, wear, and noise.

Axial steps and S-shaped fork arch contours improve shift sleeve engagement, rigidity, and space use in compact vehicle gearboxes.