ZPLH Series Planetary Reducer: Differential Tooth & Intelligent Closed-Loop Solution
I. Product Overview
Weigao ZPLH Series Planetary Reducers, covering models ZPLH60, ZPLH90, ZPLH120, ZPLH160, and ZPLH200, are high-performance precision transmission devices integrating differential tooth planetary gear trains and intelligent closed-loop monitoring technology. Tailored for medium-heavy load precision scenarios such as articulated robot joints, thermal forging equipment, and new energy test platforms, this series overcomes the shortcomings of traditional reducers such as limited transmission ratio, heavy weight, and lack of real-time monitoring in high-demand transmission fields. Compliant with ISO 6336 gear standards and AGMA 6123 certification, with IP65/IP67 graded protection, it features differential tooth precision gear sets, aluminum alloy-titanium alloy composite housing (small models) and reinforced nodular cast iron housing (large models), and intelligent lubrication system. Boasting advantages of large differential transmission ratio, lightweight high rigidity, intelligent real-time monitoring, and stable load bearing, it operates stably at -30℃ to +105℃, serving as a core component for high-end precision industrial equipment worldwide.
II. Core Advantages
1. Differential Tooth Planetary Gear Train, Large Ratio & High Efficiency
Adopting innovative differential tooth planetary gear structure, the ZPLH series achieves ultra-large transmission ratio through paired double-step planetary gears and optimized tooth number matching. Gears are crafted from 20CrMnTi alloy steel, undergoing deep carburizing, five-axis precision grinding, and tooth profile modification to ISO 5-level accuracy, with tooth surface hardness up to HRC 60-63 and roughness ≤Ra 0.03μm. The differential design (sun wheel 22 teeth, planetary wheel 28/27 double-step, inner gear ring 78/77 pairing) realizes a maximum single-stage transmission ratio of 1:196, while controlling the overall outer diameter within 200mm for compactness. Detailed precision parameters: tooth profile tolerance (f) ≤0.009mm, cumulative pitch error (F) ≤0.022mm, backlash controlled within ≤3arcmin (optional precision grade ≤1.5arcmin). Equipped with high-precision angular contact ball bearings, single-stage transmission efficiency hits 96%-98.5%, torque density reaches 17Nm/cm³, perfectly matching high-ratio precision transmission demands.
2. Integrated Lightweight Housing, High Rigidity & Low Inertia
The series features integrated lightweight housing design to balance rigidity and inertia. ZPLH60-ZPLH200 form a graded product matrix: ZPLH60-ZPLH120 adopt aluminum alloy housing + titanium alloy planetary carrier, reducing overall weight by 30% while enhancing torsional rigidity by 20%; ZPLH160-ZPLH200 use reinforced nodular cast iron housing with dense ribs, covering 55kW-160kW power and 8000Nm-45000Nm torque for ultra-heavy-load scenarios. Housing structure optimized via finite element simulation resists 2 times rated load impact, with the integrated tooth shaft design ensuring concentricity ≤5μm. The lightweight design reduces equipment inertia by 25%, shortening acceleration time by 18% and improving operation efficiency, which is especially suitable for high-frequency start-stop precision equipment.
3. Enhanced Sealing Protection, Harsh Environment Adaptation
Graded protection and stable NVH performance adapt to diverse harsh environments. ZPLH60-ZPLH120 adopt IP65 protection (double-lip fluorine rubber oil seal + labyrinth structure) for precision workshops, with hard anodized anti-corrosion treatment (salt spray resistance ≥1500 hours). ZPLH160-ZPLH200 configure IP67 protection, adding stainless steel dust cover and pressure-resistant sealing ring to resist coolant, heavy dust, and spray intrusion, with electrophoretic anti-corrosion treatment (C4 grade). The differential tooth structure optimizes meshing stability, operating noise ≤53dB (small models) and ≤57dB (large models) at 1m. Low-temperature resistant lubrication matching enables stable operation at -30℃ to +105℃, service life extended to over 48000 hours under normal continuous operation.
4. Intelligent Closed-Loop Monitoring, Predictive Maintenance
The lubrication system integrates intelligent monitoring, adopting fully synthetic micro-mist lubrication (small models) and forced circulation lubrication with oil cooler (large models), both using ISO VG 150 high-efficiency gear oil. Small models realize maintenance-free operation within 25000 hours; large models are equipped with online sensors to real-time monitor oil quality, temperature, and vibration data, uploading to the control system via industrial bus for predictive maintenance. The micro-mist lubrication reduces churning loss to 0.3%, further improving transmission efficiency. Modular design allows quick replacement of gear sets and bearings, with standardized differential tooth accessories ensuring consistent ratio and precision after overhaul, reducing maintenance downtime by 40%.
III. Typical Application Fields
- Industrial Robots: Articulated robot joints, heavy-duty collaborative arms, lightweight design and large ratio ensuring motion accuracy (ZPLH60-ZPLH120 for light load, ZPLH160-ZPLH200 for heavy load)
- Thermal Forging Equipment: Forging blank handling robots, high-temperature roller tables, high rigidity and IP67 protection adapting to dusty high-temperature environments
- New Energy Test: Wind power component test platforms, electric vehicle powertrain testers, large transmission ratio and stable torque ensuring test accuracy
- Precision Automation: High-ratio servo modules, CNC machine tool feed mechanisms, intelligent monitoring realizing predictive maintenance
- Packaging Machinery: High-speed printing lines, heavy-duty packaging equipment, low noise and efficient lubrication adapting to 24-hour continuous operation
IV. Key Technical Parameters
| Model | Transmission Ratio Range | Rated Torque | Backlash | Protection Grade |
|---|
| ZPLH60 | 3:1-100:1 | 800Nm-1800Nm | ≤3arcmin | IP65 |
| ZPLH90 | 5:1-150:1 | 1900Nm-4500Nm | ≤3arcmin | IP65 |
| ZPLH120 | 10:1-196:1 | 4600Nm-8000Nm | ≤3arcmin (Optional ≤1.5arcmin) | IP65 |
| ZPLH160 | 10:1-196:1 | 8100Nm-25000Nm | ≤4arcmin (Optional ≤1.5arcmin) | IP65 (Optional IP67) |
| ZPLH200 | 15:1-196:1 | 26000Nm-45000Nm | ≤4arcmin (Optional ≤1.5arcmin) | IP65 (Optional IP67) |
V. Installation & Maintenance
Select models based on transmission ratio, rated torque, and working environment (refer to the specification table). Ensure coaxiality error ≤0.015mm during installation, fasten flange bolts with specified torque (40-70N·m for ZPLH60-ZPLH120, 90-150N·m for ZPLH160-ZPLH200) in diagonal sequence. Use ISO VG 150 high-efficiency gear oil, replace every 20000-25000 hours based on operation frequency. Regularly check intelligent monitoring data, inspect sealing performance monthly, and calibrate backlash every 12 months. Avoid overload operation exceeding 2 times rated torque, and entrust maintenance to professional precision equipment technicians.
Weigao ZPLH Series adheres to the philosophy of "large ratio precision, lightweight efficiency, and intelligent reliability". Its differential tooth planetary structure and intelligent closed-loop monitoring break through traditional reducers' ratio and maintenance limitations, ensuring reliable operation in high-demand medium-heavy load precision scenarios. Backed by strict quality control and professional after-sales service, it provides high-performance solutions for robotics, new energy, and forging industries, establishing itself as a trusted global partner in high-ratio planetary transmission.
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