Driving the Core of the Combine
In the complex anatomy of a modern combine harvester, the separation of grain from the stalk is the primary objective. This process, known as threshing, requires a massive rotating cylinder (drum) or rotor to impact the crop against a concave grate. The mechanism responsible for delivering the high-torque, variable-speed power to this critical component is the Threshing Gearbox (Caixa de Engrenagens de Debulha). This is not merely a power transmission device; it is a torque management system designed to handle the most volatile loads in agriculture.
这 Threshing Gearbox typically sits on the side of the harvester chassis, receiving power from the engine’s main drive belt. Its primary function is to provide selectable speed ranges (e.g., High for wheat, Low for corn) while amplifying torque to prevent the cylinder from stalling when a “slug” of damp crop enters the feeder house. Advanced models integrate with variable speed belt drives (CVTs) or hydrostatic motors to offer infinite speed adjustment on the fly, allowing the operator to fine-tune the threshing aggressiveness based on crop moisture and yield.
EVER-POWER的 TG-Series (Threshing Gear) units are engineered for the extreme inertia and shock loads inherent in harvesting. Constructed with heavy-duty ductile iron housings and precision-ground helical gears, these gearboxes provide the backbone for high-capacity tangential and axial-flow combines. Whether harvesting rice in Asia or soybeans in the Americas, the reliability of the threshing drive determines the daily productivity of the machine.
Technical Specifications: TG-Series (Separator Drive)
| 范围 | 规格 | 范围 | 规格 |
|---|---|---|---|
| 输入功率额定值 | 200 HP – 500 HP (150-370 kW) | 输出速度范围 | 250 – 1200 RPM (Variable) |
| 齿轮范围 | 2-Speed (Hi/Lo) Mechanical | 最大输出扭矩 | 4,500 Nm – 7,000 Nm |
| 房屋材料 | 球墨铸铁 QT600-3 | 换挡机构 | Hydraulic / Electric Actuator |
| 齿轮类型 | Helical (Case Hardened & Ground) | 输入连接 | Driven Pulley (Multi-Groove) |
| 输出轴 | Splined Hub / Flange | 轴承 | 高容量球面辊 |
| 润滑 | Forced Feed (Pump) + Splash | 冷却 | Integrated Fins / Oil Cooler Loop |
| 密封 | FKM (Viton) Cassette Seals | 石油产能 | 5.0 Liters – 10.0 Liters |
| Clutch Interface | Electro-Magnetic or Wet Disc | 重量 | 120 kg – 250 kg |
| 比例（低） | 3:1 (For Corn/Beans) | 比例（高） | 1:1 (For Wheat/Canola) |
| 安装 | Side Chassis Frame | 保修单 | 24 Months / 2000 Hours |
| 画 | High-Temp Epoxy | 兼容性 | JD S-Series / Claas Lexion / Case IH |
| Monitoring | Temp & Speed Sensor Ports | 应用 | Threshing Cylinder / Rotor |
精心设计的“蛞蝓”防御
1. High Inertia Management
A threshing cylinder acts as a flywheel. When engaged, it stores immense kinetic energy. However, when crop conditions are tough (e.g., green-stem soybeans), the load can spike instantly, threatening to stall the drum. Our Threshing Gearbox is designed with high-contact-ratio helical gears that distribute this shock load across multiple teeth simultaneously. This prevents tooth shearing during sudden deceleration events, ensuring the drive continues to power through the blockage rather than failing.
2. Dual-Range Capability
Different crops require vastly different cylinder speeds. Corn requires slow, high-torque rotation (300 RPM) to avoid cracking kernels. Wheat requires high-speed action (1000 RPM) for separation. A single belt drive cannot efficiently cover this range. Our 2速变速箱 provides a mechanical solution: “Low Range” multiplies torque for corn, while “High Range” offers direct drive speed for small grains. This mechanical advantage allows the upstream belt variator to operate in its most efficient mid-range at all times.
3. Belt Tension Support
The input shaft of the threshing gearbox carries the main drive pulley, which is under tremendous belt tension (often exceeding 1 ton of side load). Standard bearings would deflect, causing seal failure. EVER-POWER utilizes 超大尺寸球面滚子轴承 on the input shaft supported by a reinforced “snout” housing. This robust design absorbs the radial belt load, keeping the internal shafts perfectly aligned and the seals tight.
4. Reverser Integration
When a combine plugs, the operator must reverse the feeder house and threshing cylinder to clear the blockage. The gearbox must withstand full torque in reverse rotation. Our gear profiles are designed for bi-directional strength, and the lubrication system includes check valves to ensure oil flow is maintained to critical bearings even when the gearbox is spun backward during a unplugging cycle.
Comparative Analysis: Gearbox vs. Hydrostatic vs. Belt Only
| 特征 | 2-Speed Gearbox Drive (TG Series) | 仅限可变皮带传动 | Hydrostatic Direct Drive |
|---|---|---|---|
| 扭矩容量 | Very High (Mechanical) | 限量版（皮带滑脱） | Medium (Pressure limited) |
| 效率 | 高（96-98%） | Medium (90-94%) | Low (75-85% Heat loss) |
| 速度范围 | 宽（双范围） | 有限比率 | 无限（0-最大值） |
| 维护 | 低（换油） | 高（皮带/滑轮磨损） | High (Fluid/Filters) |
| 成本 | 中等的 | 低的 | 非常高 |
*The 2-Speed Gearbox remains the industry standard for high-capacity combines due to its torque density.
本地化应用：全球农业
水稻收割（亚洲/美国）
Rice straw is tough and abrasive (“roping”). It places maximum stress on the threshing drive. Our 重型铸铁 gearboxes are preferred in Arkansas and China for their rigidity. The housing does not flex under the extreme torque loads of roped rice straw, maintaining gear alignment and preventing bearing failure.
玉米收割（巴西/美国中西部）
Corn harvest requires low cylinder speeds to prevent kernel damage. Our gearboxes feature a robust 减速齿轮（低速档） 这样既能倍增扭矩，又能降低滚筒转速。这使得联合收割机能够在高速行驶时处理高水分玉米，而不会出现滚筒停转或发动机动力不足的情况。
📒 Field Engineer’s Log: The “Stalled” Drum
“October 2025, Iowa Corn Harvest. A farmer with a rotary combine kept plugging the rotor in green-stem corn. The belt was slipping and smoking.”
“这台联合收割机采用单速皮带传动。他试图让转子慢速运转（以避免豆类受损），但在低速皮带轮设置下，皮带的抓地力不足。
解决方案：我们对驱动器进行了改造，使其与我们的产品相匹配。 TG-200 Two-Speed Gearbox我们把它切换到低速档。这样机械地降低了速度，同时扭矩增加了一倍。皮带现在可以在皮带轮上更高、更高效地运行。联合收割机顺利地穿过青草，一次也没有堵塞，而且收割的谷物样品比以往任何时候都更干净。
常见问题解答（OEM/B2B）
1. 分离器运转时可以换挡吗？
No! Most agricultural gearboxes utilize non-synchronized mechanical shifters (dog clutches). You must disengage the separator clutch and wait for the drum to stop spinning before shifting ranges. Attempting to shift under load will grind the gears and bend the shift fork.
2. 哪种油最适合高温作业？
Threshing gearboxes run hot due to proximity to the engine and dust insulation. We recommend a 全合成 ISO VG 220 或 75W-140 齿轮油. Synthetic oil maintains film strength at high temperatures (up to 120°C) better than mineral oil, protecting the gears.
3. Is this compatible with John Deere S-Series?
Yes. Our TG-Series includes models specifically designed to replace or upgrade the rotor drives on John Deere STS, Case IH Axial-Flow, and Claas Lexion combines. We match the spline inputs and mounting bolt patterns for a direct fit.
4. How do I detect bearing failure?
Listen for a low growling noise that changes pitch with RPM. Check for oil leaks at the input seal; shaft deflection from a worn bearing often ruins the seal first. Infrared thermometers are useful for spotting a bearing cap running hotter than the rest of the housing.
全速收割
使用 EVER-POWER 脱粒变速箱升级您的联合收割机核心部件，实现不间断性能。
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主要市场：北美、欧洲、巴西、阿根廷、俄罗斯。
