PLE Series Planetary Reducer: Parallel Shaft Helical & Servo-Adapted High Rigidity Solution
I. Product Overview
Weigao PLE Series Planetary Reducers, covering models PLE60, PLE80, PLE90, PLE120, and PLE160, are high-rigidity transmission devices integrating parallel shaft helical planetary gear trains and servo motor dedicated adaptation design. Tailored for scenarios demanding servo system matching, high dynamic response, and stable long-term operation such as servo-driven automation lines, robotic joints, and precision linear modules, this series overcomes the shortcomings of traditional reducers such as poor servo compatibility, insufficient rigidity, and short service life in high-response transmission fields. Compliant with ISO 6336 gear standards and ISO 9001 certification, with IP65 protection grade, it features parallel shaft helical gear sets, integral cast aluminum (small models) and cast iron (large models) housing, and optimized servo connection structure. Boasting advantages of servo precise matching, high rigidity and dynamic response, long-term stable operation, and wide power coverage, it operates stably at -20℃ to +95℃, serving as a core supporting component for servo-driven industrial equipment worldwide.
II. Core Advantages
1. Hard Tooth Surface Planetary Structure, High Torque Density
Adopting integrated parallel shaft helical planetary structure, the PLE series achieves high-efficiency servo transmission through meshing of integral forged sun gears, planetary gears, and inner gear rings with parallel shaft helical design. Gears are crafted from 20CrMnTi alloy steel, undergoing deep carburizing, quenching, and precision grinding to ISO 6-level accuracy (GB/T 10095.1-2008 equivalent), with tooth surface hardness up to HRC 60-63 and roughness ≤Ra 0.035μm. Detailed precision parameters: sun/planet gear tooth profile tolerance (f) ≤0.010mm, tooth direction tolerance (f) ≤0.008mm, cumulative pitch error (F) ≤0.025mm; inner gear ring ISO 7-level accuracy, with f ≤0.015mm. Parallel shaft helical design ensures meshing stability, enhancing dynamic response speed by 30% versus ordinary planetary reducers, and backlash is controlled within ≤5arcmin (servo precision grade optional ≤2arcmin). Equipped with high-rigidity bearing structure, torque density reaches 15Nm/cm³, single-stage efficiency hits 96%-98%, speed ratio 3:1-100:1 (multi-stage extendable to 2500:1), perfectly matching servo motor's high-response transmission demands.
2. Shaft-Mounted Direct-Drive Design, Compact Installation
The series features servo motor dedicated adaptation design, supporting direct flange connection with mainstream servo motors (Siemens, Mitsubishi, Panasonic, etc.) without additional adapters, ensuring coaxiality accuracy ≤0.015mm. PLE60-PLE160 form a complete product matrix: PLE60-PLE90 (cast aluminum housing) cover 0.3kW-30kW power and 200Nm-3500Nm torque for light-medium servo load; PLE120-PLE160 (cast iron housing) cover 37kW-110kW power and 4000Nm-22000Nm torque for heavy-duty servo scenarios. Housing structure optimized via finite element simulation enhances integral rigidity by 25%, with reinforced ribs and thickened wall design resisting deformation under 1.5 times rated load and frequent start-stop impact. Equipped with servo-specific torque arm and anti-vibration damping pad, it minimizes resonance during servo operation, ensuring stable transmission of servo signals and motion.
3. Enhanced Sealing Protection, Harsh Environment Adaptation
Integrated long-term stable protection design ensures reliable operation in servo-driven continuous working conditions. Input/output ends adopt double-lip fluorine rubber oil seals combined with labyrinth sealing, achieving IP65 protection to prevent dust, light oil, and coolant intrusion. Small models (PLE60-PLE90) adopt hard anodized anti-corrosion treatment, large models (PLE120-PLE160) electrophoretic treatment (C3 grade), adapting to servo automation workshops and general industrial environments. Integrated cooling fins and optimized oil circulation path enhance heat dissipation efficiency by 22%, avoiding overheating during long-term high-speed servo operation. High-precision angular contact ball bearings reduce radial runout to ≤0.012mm, operating noise ≤56dB at 1m, ensuring no interference to servo system stability, service life extended to over 38000 hours under normal continuous operation.
4. Extreme Pressure Lubrication, Low Maintenance Cost
The lubrication system adopts ISO VG 150 servo-specific gear oil, featuring excellent anti-wear, anti-oxidation, and low-temperature fluidity, matching servo frequent start-stop and high-response operation to reduce friction resistance. Oil bath lubrication with forced splash design ensures uniform oil supply to meshing parts and bearings, forming a stable oil film. The housing is equipped with a servo-adapted oil level sensor, visual oil level window, and quick oil change port, facilitating real-time monitoring and maintenance without disassembling servo connections. Recommended oil change cycle: 16000 hours for continuous servo operation, 9000 hours for high-frequency start-stop scenarios. Modular design allows quick disassembly of gear sets and bearings, with servo-matched precision accessories ensuring consistent performance after overhaul.
III. Typical Application Fields
- Servo Automation Lines: Precision linear modules, servo-driven conveyors, servo adaptation ensuring high dynamic response (PLE60-PLE90 for light load, PLE120-PLE160 for heavy load)
- Robotic Systems: Industrial robot joints, collaborative robot arms, high rigidity and stable backlash ensuring motion accuracy
- Precision Machinery: Servo feeding mechanisms, CNC lathe auxiliary drives, parallel shaft design adapting to compact layout
- Electronic Equipment: Servo-controlled packaging machines, semiconductor auxiliary equipment, low noise and stable operation meeting workshop requirements
- New Energy Equipment: Battery module assembly lines, servo-driven handling robots, long service life adapting to 24-hour continuous operation
IV. Key Technical Parameters
| Model | Servo Connection Mode | Rated Torque | Backlash | Housing Material |
|---|
| PLE60 | Flange Direct Connection (IEC Standard) | 200Nm-600Nm | ≤5arcmin (Optional ≤2arcmin) | Cast Aluminum |
| PLE80 | Flange Direct Connection (IEC Standard) | 700Nm-1800Nm | ≤5arcmin (Optional ≤2arcmin) | Cast Aluminum |
| PLE90 | Flange Direct Connection (IEC/JIS Standard) | 1900Nm-3500Nm | ≤5arcmin (Optional ≤2arcmin) | Cast Aluminum |
| PLE120 | Flange Direct Connection (IEC/JIS Standard) | 4000Nm-12000Nm | ≤6arcmin (Optional ≤2.5arcmin) | Cast Iron |
| PLE160 | Flange Direct Connection (IEC Standard) | 13000Nm-22000Nm | ≤6arcmin (Optional ≤2.5arcmin) | Cast Iron |
V. Installation & Maintenance
Select models based on servo motor power, rated torque, transmission ratio, and backlash requirements (refer to the specification table). Ensure coaxiality error ≤0.015mm during installation, fasten flange bolts with specified torque (25-50N·m for PLE60-PLE80, 60-110N·m for PLE90-PLE160) in diagonal sequence, and install anti-vibration damping pads between housing and base. Use ISO VG 150 servo-specific gear oil, replace every 9000-16000 hours based on servo operating frequency. Regularly inspect sealing performance, backlash value (calibrate every 8 months), and oil quality. Avoid excessive impact load during servo operation, and entrust maintenance to professional technicians to ensure servo matching accuracy after overhaul.
Weigao PLE Series adheres to the philosophy of "servo synergy, rigid stability, and long-term durability". Its parallel shaft helical structure and servo-adapted design break through traditional reducers' matching limitations, ensuring reliable operation in high-response servo-driven scenarios. Backed by strict quality control and professional after-sales service, it provides high-performance supporting solutions for servo automation, robotics, and precision machinery, establishing itself as a trusted global partner in servo-matched planetary transmission.
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