Product Overview
The lawn mower gearbox is the core drive component of residential and commercial lawn maintenance equipment, responsible for transmitting motor power to the blade to drive high-speed rotation for grass cutting. Due to harsh operating conditions — outdoor exposure, high vibration, grass clippings and dust, and potential impacts with stones and other hard objects — the lawn mower gearbox must possess extremely high reliability, sealing integrity, and impact resistance. Weight and noise are also important design considerations as key components of handheld/push-type equipment.
Yubao Transmission Technology's lawn mower gearboxes feature aluminum die-cast housings (ADC12), weight 2.5–5kg, single or dual-stage reduction designs, with reduction ratios from 5:1 to 50:1 customizable. Gears are carburized, hardened, and ground to DIN Grades 6–7 accuracy with transmission efficiency ≥93%. The sealed design achieves IP54 protection, effectively blocking grass clippings, dust, and moisture. Products pass 500-hour continuous endurance testing with a 10-year design life, suitable for residential lawn mowers, commercial riding mowers, golf course maintenance equipment, and municipal landscaping trimmers.
Technical Parameters
Dimensions
| Parameter | Symbol | Unit | Value/Range | Tolerance | Notes |
|---|
| Overall Length | L | mm | 150–350 | ±2 | Including input/output ends |
| Overall Width | W | mm | 120–280 | ±2 | Including mounting flange/trunnion |
| Overall Height | H | mm | 150–300 | ±2 | Including output shaft height |
| Weight | — | kg | 2.5–8 | ±10% | Including lubricant |
Transmission Parameters
| Parameter | Symbol | Unit | Value/Range | Tolerance | Notes |
|---|
| Input Speed | n1 | rpm | ≤3600 | max. | Small engine/motor speed |
| Output Speed | n2 | rpm | Customized | — | Determined by blade diameter and ratio |
| Reduction Ratio | i | — | 5:1–50:1 | ±3% | Single or dual-stage |
| Rated Output Torque | T2 | N·m | 20–100 | — | Continuous duty |
| Impact Torque | — | N·m | 300–500 | max. | Impact protection design for hard objects |
| Rated Input Power | P1 | kW | 0.5–4.0 | — | Matched power source |
| Transmission Efficiency | η | % | ≥93 | ≥ | Single-stage >93% |
| Backlash | jt | arcmin | ≤20 | ≤ | Non-precision positioning application |
Output Shaft & Mounting
| Parameter | Symbol | Unit | Value/Range | Tolerance | Notes |
|---|
| Output Shaft Type | — | — | Spline/Keyway/Thread | — | Connection to blade disc |
| Housing Mounting | — | — | Flange/Foot/Trunnion | — | Per equipment structure |
| Output Shaft Direction | — | — | Vertical/Horizontal | — | Lawn mowers typically vertical output |
| Blade Interface | — | — | Standard/Custom | — | Adapted to mainstream blade mounting specifications |
Structure & Materials
| Parameter | Symbol | Unit | Value/Range | Tolerance | Notes |
|---|
| Housing Material | — | — | ADC12 Aluminum Alloy | — | Die-cast, lightweight |
| Gear Material | — | — | 20CrMnTi | — | Carburized hard-faced |
| Bearing Brand | — | — | NSK/NTN | — | Sealed bearings |
| Lubrication Method | — | — | Grease/Oil | — | Lifetime/lubricated/periodic change |
| Sealing Type | — | — | Lip seal + Dust cap | — | Dust and grass clipping protection |
| Parameter | Symbol | Unit | Value/Range | Tolerance | Notes |
|---|
| Protection Rating | IP | — | IP54 | — | Dust-protected and splash-water resistant |
| Operating Temperature | — | ℃ | -20–+60 | — | Outdoor environment |
| Noise Level | — | dB(A) | ≤75 | ≤ | Measured at 1m (excluding blade) |
| Design Life | — | h | ≥500 | — | Continuous endurance test passed |
| Oil Change Interval | — | h | Maintenance-free/200h | — | Or per user manual |
| Bearing Life | — | h | ≥500 | L10 | 500-hour continuous test |
| Vibration Level | — | m/s² | ≤5 | ≤ | Measured at handle |
Environmental Adaptation Design
| Environmental Factor | Countermeasure | Design Detail |
|---|
| Grass Clippings & Dust | Multiple sealing | Labyrinth dust structure + rubber seals |
| Moisture & Rain | Waterproof sealing | IP54 protection, sealing gasket/adhesive |
| Impact Loads | Overload protection | Slip clutch/shear pin protection |
| Vibration Fatigue | Vibration reduction design | Dynamic balance correction, vibration-dampening mounts |
| UV Aging | Weather-resistant materials | Housing anodizing/weather-resistant coating |
| Salt Spray Corrosion | Anti-corrosion treatment | Housing surface treatment, stainless steel fasteners |
Overload Protection Options
| Protection Method | Principle | Application |
|---|
| Slip Clutch | Slips when torque exceeds set value | Residential small mowers |
| Shear Pin | Shear pin fractures on impact to protect gears | Commercial equipment |
| Elastic Coupling | Cushions and absorbs impact energy | All types |
| Electronic Protection | Motor overload automatic shutdown | Electric mowers |
Product Features
- High Reliability: Passes 500-hour continuous endurance testing, 10-year design life
- Impact Resistant: Overload protection design safeguards core transmission components against hard object strikes
- Excellent Sealing: IP54 protection effectively blocks grass clippings, dust, and rain
- Lightweight: Aluminum housing, overall weight 2.5–5kg
- Low Vibration: Output dynamic balance correction, handle vibration ≤5m/s²
- Maintenance-Free Optional: Full-life lubrication design for worry-free user experience
- Corrosion Resistant: Housing anti-corrosion coating + stainless steel fasteners for outdoor environments
Typical Applications
| Equipment Type | Power Range | Reduction Ratio | Characteristics |
|---|
| Residential Push Mower | 1–2kW | 5:1–10:1 | Lightweight, cost-effective |
| Residential Self-Propelled Mower | 2–3.5kW | 10:1–20:1 | Drive wheel + blade dual output |
| Commercial Riding Mower | 5–15kW | 10:1–30:1 | High torque, high reliability |
| Golf Course Maintenance Equipment | 3–7kW | 15:1–30:1 | Precision trimming, low vibration |
| Municipal Landscaping Trimmer | 2–5kW | 10:1–20:1 | High duty cycle |
| Smart Robotic Mower | 0.5–1kW | 20:1–50:1 | Low noise, waterproof |
