Spanners TRIZ Cases

A mechanical tensioner nut converts rotational movement into axial bolt tension using a compact interface device.

A handheld power tool housing absorbs reaction torque through friction against the workpiece surface.

A handheld power tool uses a second supporting handle with an independent switch to enforce two-handed operation for balanced motor support.

Articulated couplers with pliable covers maintain stability under torque while navigating complex interference patterns.

Segmented cartridges with magnetic retention enable single-handed bit selection in a multi-bit screwdriver, eliminating two-handed handling risks.

Motor-driven chuck rotates wrench head automatically, eliminating repetitive wrist motions that cause operator fatigue during torque adjustments.

A C-like jaw with inclined guide surfaces clamps five sides of a hexagonal screw member to prevent slippage during operation.

A socket wrench retaining ring uses a hook and straight leg to secure sockets in the driving seat.

A screw driving machine adjusts driving depth via a switchable contact portion to handle varying material thicknesses.

A rotating rod with sleeves and an end knob converts handle turning into jaw movement.

Rotating the actuating body moves a switching ring along a control track, engaging catch bodies to prevent unintentional torque changes.

Threaded adjustment mechanism sets drive pinion axial position to resolve torque variations from incorrect gear teeth engagement.

A staging member with a vertical dowel holds ordered fasteners while a placement member grips them via flexing arms.

Segmenting the wrench into a universal handle and interchangeable sockets resolves adaptability versus complexity trade-offs.

A modular housing attaches to a screw bit and features a movable indicator for angle display.

A correction circuit adjusts drive command values based on detected load torque, preventing actual rotational speed drops and motor lockup at low speeds.

A motor-driven screwdriver computing unit switches modes to track tightened components accurately.

A screw tightening apparatus uses a coaxial magazine plate and rotary rod device to position the tip portion for bolt engagement.

An adjusting knob pulls outward to disengage toothed portions for rapid torque value selection.

System eliminates manual adjustment errors by transmitting correct operating parameters via wireless link as the tool moves between work sites.

Spring-loaded clutch mechanism prevents fastener stripping by slipping at preset torque limits.

A motorized adjustable wrench uses a geared head and drive gear to rotate nuts.

Placing a torque sensor between the motor and tool holder eliminates indirect measurement inaccuracies, ensuring precise setpoint torque achievement.

A grip device stabilizes hexagonal wrenches using a movable rotary member and resilient bias to maintain secure lateral contact during operation.

Dynamic PWM rotation speed control adjusts motor output based on operational phase detection.

A pneumatic ratchet wrench features a shrunk head section housing the output unit to reduce overall width.

Adjustable driving member couples to ratchet wrench body via limiting portions for secure engagement.

A ratchet wrench uses a positioning unit to bias pawl teeth for drive member engagement.

An optically conductive ring lens encircles the tool holder to direct light from the lighting element onto the workspace.

Stationary inertia member mitigates spring effect to deliver higher peak torque via rotary impact device.

Concentric polygonal holes in a single socket body provide three distinct fitting positions, eliminating the need for multiple specialized tools.

A friction-based driver head retains non-magnetic screws within an autoloading cartridge system.

Switching member with an elastic element biases a pawl recessed portion to prevent deformation and ensure reliable ratcheting-direction switching.

Axial extensions on the bearing retainer support the motor shaft, resolving the trade-off between drop impact strength and rotation detection precision.

Asymmetric arc wrench projections engage tool actuating sections to prevent damage during high-torque fastening operations.

A screwdriver with a transformable drive tip mechanism switches between Phillips and flathead configurations using an internal rotation system.

Gear tooth engagement replaces fixed click mechanisms to deliver infinitesimal incremental rotations for precise bolt tightening.

Segmented driver bits prevent slippage on damaged fasteners by biting into the head, eliminating the need for bolt extractors.

A multipurpose rotational tool integrates a screwdriver and wire nut driver via a coaxial sliding mechanism for rapid functional switching.

Forward positioning of the impact mechanism and output shaft orthogonal to the motor axis achieves 500 to 1,000 N·m fastening torque.

A pre-calibrated manual torque screwdriver uses modular handle chambers and interchangeable shanks to deliver exact rotational force.

A locking flex hand tool uses a selector and gear slider to position the head at any angle.

Segmented pawls with flat surfaces clamp against a pusher to eliminate rattling and wear on the toothed wheel.

Segmented springs and a detent mechanism resolve the trade-off between ease of jaw separation and reliable retention on oil filter cartridges.

Nested output sockets resolve size-reliability trade-offs while reducing weight by 39%.

Segmented mounting parts enable dynamic repositioning in restricted spaces without removing the tool, resolving adaptability versus complexity trade-offs.

A multifunctional screwdriver integrates a ratchet mechanism with detachable components to enhance operational efficiency.

Reverse rotation releases jammed fasteners in hand-held power tools, preventing injury and eliminating the need for additional release tools.

An integrated magnetic retention mechanism and push rod release system simplifies manufacturing complexity while enabling rapid tool bit removal.

Sliding gripping pieces with oblique working faces frictionally engage hexagonal fasteners, resolving the trade-off between simple structure and secure grip.