Agriculture Pto Drive Shaft Lemon Pipe

1. Product definition and origin of name

The Lemon Pipe for agricultural machinery PTO drive shaft is a special drive shaft tube designed for agricultural power take-off (PTO) systems. Its name "Lemon Pipe" comes from its unique segmented lemon-shaped corrugated tube structure. This design achieves flexible compensation through axial corrugated protrusions while maintaining high-strength torque transmission capabilities. It is a key component of modern agricultural machinery transmission systems.

2. Core structural features

(1) Corrugated pipe design

Lemon-shaped segments: The pipe body has periodic corrugated protrusions (similar to the surface texture of a lemon), and each segment is 50-100 mm long

Flexible compensation segment: The corrugated structure can axially expand and contract by±15 mm and radially deflect by±5°, which can adapt to the misalignment conditions in field operations

Reinforcement ring: A ring-shaped reinforcement steel belt is built into each trough to prevent the pipe body from deforming during high-speed rotation

(2) Connection end structure

End type Technical parameters Applicable scenarios

Quick-change six-claw flange DIN 9682 standard Combine harvester/baler

Involute spline ISO 14-1 30°pressure angle Tractor PTO output end

Safety shear pin 42CrMo quenched pin (φ10 mm) Overload protection system

(3) Material technology

Base tube material: BF35MnB boron steel (tensile strength≥850MPa)

Surface treatment:

Inner wall: manganese phosphate conversion coating (film thickness 8-12μm)

Outer wall: arc sprayed aluminum-zinc alloy (150μm) + polyurethane coating

3. Performance advantage comparison

Indicators Traditional PTO solid shaft Lemon tube structure

Torsional stiffness 100% baseline value 85% baseline value

Weight reduction 0% 35-40%

Deflection compensation±2° ±5°

Vibration attenuation None Reduce high-frequency vibration by 40%

Fatigue life 3000h 5000h (ISO 6336)

4. Typical application scenarios

(1) Operation in hilly areas

On a 15°slope, the bellows structure can compensate for the height difference between the tractor and the agricultural implement

Example: John Deere 7R series tractor equipped with a rotary tiller (working width 3.5m)

(2) Harvesting high-stalk crops

Flexible design prevents drive shaft jamming due to crop lodging during corn/sugarcane harvesting

Measured data: 32% reduction in drive system failures on the CLAAS Lexion 570 combine harvester

(3) Paddy field operation

Fully sealed structure (IP67 protection level) prevents mud and water intrusion

Special coating resists salt water corrosion (passes 500h salt spray test)

5. Key technological breakthroughs

(1) Dynamic balancing technology

Online dynamic balancing correction using laser (residual imbalance≤2.5g·cm)

Working speed range: 540-1000rpm (ISO 500-2 standard)

(2) Intelligent monitoring system

The integrated sensor can monitor in real time:

Torque fluctuation (±5% accuracy)

Pipe body temperature (PT100 temperature measurement)

Vibration spectrum (0-2000Hz range)

(3) Modular maintenance design

Quick-release corrugated segment (single segment replacement time≤15 minutes)

Patented V-clamp connection (no special tools required for disassembly)

6. Maintenance specifications

Daily inspection:

Bellows extension and contraction freedom (manual tensile test)

Protective cover integrity

Quarterly maintenance:

Cleaning internal dust (compressed air purge)

Adding grease (NLGI 2# lithium grease)

Annual overhaul:

Magnetic particle inspection to check micro cracks

Spline wear measurement (limit value 0.3mm)