New Energy Power parts Drive motor head assy 3509412-KZ900

The motor head integrates a multi-layer sealing structure to protect internal components (bearings, oil seals) from harsh environments. It uses a double-lip nitrile rubber oil seal (lip diameter tolerance: ±0.05mm) at the shaft interface, and silicone gaskets between the head and motor housing—achieving IP67 waterproof and dustproof ratings. This design withstands 1m deep water immersion for 30 minutes and blocks road dust, mud, or salt spray, preventing bearing corrosion or lubricant contamination. The sealing components are resistant to -40°C to 120°C temperatures, maintaining integrity in extreme climate conditions

The assembly features an integrated aluminum alloy heat sink (material: 6061-T6, thickness: 8-12mm) with 15-20 radial fins (height: 10mm, spacing: 5mm) to enhance heat transfer. It directly absorbs heat from the motor’s front end (where temperature concentrates during operation) and dissipates it via convection—reducing motor head temperature by 15-20°C under full load. The heat sink’s surface is treated with anodic oxidation (thermal conductivity: ≥200 W/(m·K)), further improving heat dissipation efficiency. This design prevents overheating-induced wear of bearings and oil seals, extending the drive motor’s service life to 150,000+ km

Key components of the motor head are built for NEV long-term reliability: the main body uses high-strength ductile iron (QT500-7) with a tensile strength of ≥500 MPa, resisting deformation under high torque. The built-in deep-groove ball bearings (model: 6206/6208) are made of chrome steel (SUJ2) with a dynamic load rating of ≥25 kN, supporting 10,000+ hours of continuous operation. The oil seal’s spring-loaded lip design ensures constant contact with the shaft, preventing lubricant leakage (oil leakage rate: ≤0.1g/h) even after 50,000+ km of driving. All metal parts are coated with anti-corrosion zinc plating (thickness: 8-10μm) to resist rust from moisture

The motor head adopts a precision-machined mounting flange (flatness tolerance: ≤0.03mm) to ensure coaxiality with the motor shaft (runout: ≤0.05mm)—avoiding vibration-induced noise or uneven wear. It comes with pre-assembled oil seals and bearings, eliminating the need for on-site component installation and reducing assembly time by 40%. For maintenance, the motor head features 4-6 easily accessible hexagon socket bolts (M8×20) that allow quick disassembly without removing the entire drive motor. Additionally, the oil seal is designed for tool-free replacement, enabling technicians to service it in 20-30 minutes—lowering NEV maintenance costs