Core test content (by module)

1. Mechanical durability and fatigue testing (the core)

- Rotation life cycle test

Rotate continuously/intermittently at rated speed (200–800 RPM), with a set total number of cycles (100,000–1,000,000 cycles)

Inspection: brush bristle wear, breakage rate, hair loss rate, brush body deformation, fastener loosening

- Start-stop shock cycle test

Frequent start/stop (e.g. start and stop once every 30 seconds) to assess the impact fatigue resistance of the motor and transmission components

- Collision/obstacle-surmounting durability test

Simulate collision thresholds and obstacles (with a height of 10-20mm) with a cycle count of ≥5000 times

Inspection: deformation of the brush arm, reset capability, cracking/loosening of the connecting structure

- Tuft/bristle pull test

The pull-off force of individual bristles/entire rows of bristles is used to determine the bonding/riveting strength (refer to the toothbrush standard GB 19342)

2. Wear and friction performance testing

- Bristle abrasion resistance test

Conduct cyclic friction on a standard abrasion tester (such as sandpaper, abrasion cloth) to measure wear volume and fracture period

- Anti-entanglement test

Introduce standard hair/fiber, measure winding speed, rotational speed/current loss, and disassembly difficulty

- Wear of structural components

Wear extent, clearance variation, and lubrication failure of bearings, shaft sleeves, and transmission components

3. Motor and electrical performance testing (side brush drive motor)

- Continuous operating life

Continuous operation at rated load (for hundreds to thousands of hours), measuring stability of speed, current, and temperature rise

- Temperature rise test

Under rated operating conditions, the temperature limit of the motor housing/winding is usually ≤80℃ (as per GB/T 4288)

- Insulation and electrical safety

Insulation resistance, withstand voltage, leakage current (GB/T 4288, GB 4706 series)

- Vibration and noise

Operating vibration acceleration, noise level (≤65dB, the commonly used limit value)

4. Environmental adaptability test

- High and low temperature cycling

Cycle through -20℃ to 60℃ to assess material aging, embrittlement, and deformation

- Damp heat/Salt spray

Damp heat (40℃/93%RH), salt spray (GB/T 2423.3), assessing corrosion and insulation deterioration

- Dustproof test

Operating in a dusty environment, assess the impact of dust ingress on the motor/bearing

5. Performance degradation and functional verification

- Cleaning efficiency decay: change in cleaning rate of standard dust/debris after cycling

- Load capacity: torque and current stability under carpet/obstacles

- Assembly reliability: fit accuracy and looseness after repeated disassembly and assembly