Closing the Loop in Modern Agriculture
The widespread adoption of Drip Irrigation (Irrigação por Gotejamento) has revolutionized water efficiency in crops ranging from tomatoes and peppers to cotton and corn. However, at the end of every growing season, farmers face a monumental challenge: removing thousands of kilometers of thin-walled polyethylene drip tape and plastic mulch from the field. This material is often buried under soil, entangled with roots, and heavy with residual water.
De Drip Tape Retrieval Machine (Recolhedora de Fita de Gotejamento) is the specialized implement designed to automate this task. It typically mounts to a tractor’s 3-point hitch and uses rotating spools to wind the tape into tight bundles for recycling or disposal. The critical component enabling this process is the Retrieval Gearbox (Caixa de Transmissão de Recolhimento).
Unlike standard rotary cutters or tillers, the retrieval gearbox must offer Variable Speed Control En Torque Limiting capabilities. As the spool fills with tape, its diameter increases, which naturally increases the linear speed of the tape being pulled. If the gearbox speed is constant, the tension will snap the tape. Therefore, modern retrieval gearboxes are often driven by hydraulic motors with pressure-relief valves or incorporate slipping clutches to maintain constant tension without breaking the plastic.
EVER-POWER's RG-Series (Retrieval Gear) drives are engineered for these harsh, high-load start-stop conditions. Whether pulling tape from heavy clay soil or winding delicate T-Tape, our gearboxes provide the smooth, high-torque rotation necessary to clear fields efficiently before the winter freeze or cover crop planting.
Technical Specifications: RG-Series (Winder Drive)
| Parameter | Specificatie | Parameter | Specificatie |
|---|---|---|---|
| Invoerbron | Hydraulic Motor (SAE A/B 2-Bolt) | Uitgangssnelheid | 0 – 400 RPM (Variable) |
| Maximaal koppel | 800 Nm – 1,500 Nm | Overbrengingsverhouding | 3:1 / 5:1 / Direct Drive |
| Behuizingsmateriaal | Cast Iron / Aluminum Alloy | Spool Capacity | Up to 100 kg (Tape Bundle) |
| Shaft Type | Tapered / Splined / Keyed | Schachtdiameter | 30mm – 50mm |
| Lagers | Zware, taps toelopende rol | Afdichten | Double Lip (Mud Protection) |
| Hydraulic Flow | 30 – 60 L/min | Pressure Rating | Up to 200 Bar (3000 PSI) |
| Montage | Cantilever or Pillow Block | Smering | Sealed Grease / Oil Bath |
| Ejection System | Integrated Hydraulic Push-Off | Control Valve | Flow Control (Speed adjust) |
| Overbelastingsbeveiliging | Relief Valve (Hydraulic) | Gewicht | 20 kg – 45 kg |
| Verf | Powder Coat (Custom Color) | Garantie | 12 maanden |
| Verenigbaarheid | Andros / Ortomec / Checchi | Sollicitatie | Tape / Mulch / Net Retrieval |
Engineering the “Perfect Spool”
1. De uitdaging van de cantileverbelasting
Retrieval heads typically hold the spool from one side (cantilevered) to allow for easy unloading of the tape bundle. As the bundle grows, it can weigh over 50kg and exert tremendous leverage on the gearbox output shaft. Standard gearboxes will suffer from shaft deflection and seal failure. Our RG-Series features an Extended Output Snout with Dual Tapered Roller Bearings. This robust bearing arrangement supports the overhung load of a full spool, ensuring the shaft remains true even when winding heavy, mud-caked mulch.
2. Hydraulic Tension Control
Drip tape is fragile. If you pull too hard, it snaps, forcing the operator to stop and re-tie the line. Our gearboxes are designed to pair with Hydraulische orbitale motoren equipped with a crossover relief valve. This allows the operator to set a maximum torque pressure. If the tape gets stuck in the mud, the motor stalls safely (bypassing oil) rather than breaking the tape or the gearbox gears. This “Soft-Stall” capability is crucial for high-speed retrieval operations.
3. Integrated Bundle Ejection
Once the spool is full, removing the tightly wound plastic bundle can be difficult. Advanced retrieval machines use a “collapse and push” mechanism. Our RG-Series gearboxes can be configured with a Hollow Output Shaft or a concentric hydraulic cylinder mount. This allows a push-rod to extend through the center of the gearbox to mechanically eject the bundle from the tapered spool, streamlining the unloading process and reducing operator fatigue.
4. Debris Management
The retrieval environment is dirty. As the tape is pulled from the ground, it flings mud, water, and plant matter directly at the drive unit. We utilize a Multi-Lip Cassette Seal protected by a metal labyrinth shield on the output shaft. This prevents liquid mud and crop residue from winding around the shaft and compromising the seal integrity, ensuring the internal gears remain lubricated and contaminant-free.
Comparative Analysis: Hydraulic Drive vs. PTO Drive vs. Electric
| Functie | Hydraulic Drive (RG Series) | PTO Mechanical Drive | Electric Motor Drive |
|---|---|---|---|
| Snelheidsregeling | Infinite (Flow Control) | Fixed (Tractor RPM) | Variable (Requires VFD) |
| Tension Safety | Excellent (Pressure Relief) | Poor (Slip Clutch Needed) | Good (Current Limit) |
| Onderhoud | Low (Sealed System) | Medium (U-Joints/Chains) | High (Moisture issues) |
| Vermogensdichtheid | Zeer hoog | Hoog | Low (Requires large motor) |
| Kosten | Medium | Laag | Hoog |
*Hydraulic drive is the industry standard for retrieval due to its inherent safety and control.
Lokale toepassing: Wereldwijde landbouw
Tomato Fields (California/Italy)
Processing tomato fields use heavy-duty buried drip tape. Retrieval machines here pull 3-5 lines simultaneously. Our Multi-Head Gearbox Systems allow independent control of each spool, ensuring that if one line snaps, the others continue winding, maximizing field efficiency.
Plastic Mulch (China/Spain)
Retrieving thin plastic mulch is tricky as it tears easily. Our gearboxes with Fine-Flow Hydraulic Valves allow operators to dial in the speed to a crawl (5-10 RPM), gently lifting the plastic from the soil bed without shredding it, which is crucial for reducing microplastic pollution.
📒 Field Engineer’s Log: The “Tangled” Spool
“October 2025, Fresno, CA. A recycling contractor complained that his retrieval machine shafts were bending. He was winding 15-mil thick drip tape from a depth of 12 inches.”
“We inspected the machine. He was using a standard chain-drive system with a 30mm shaft supported only on one end. The mud weight on the tape was creating over 500Nm of torque, bending the shaft.
Solution: We retrofitted the machine with our RG-100 Heavy Duty Gearbox. This unit features a 50mm splined output shaft and an integrated pillow block housing. We also added a hydraulic pressure reducing valve to limit the pull force to safe levels. The bending stopped, and the stiffer shaft allowed for larger, denser bundles to be wound, improving trucking efficiency to the recycling plant.”
Veelgestelde vragen (OEM/B2B)
1. Can I use a chain drive instead of a gearbox?
You can, but it’s dangerous and maintenance-heavy. Exposed chains are hazardous to operators working near the spools and wear out quickly in dusty/muddy conditions. A direct-drive gearbox is safer (enclosed), cleaner, and more compact.
2. What hydraulic motor fits?
Our RG-Series typically accepts SAE A 2-bouten motors (like Danfoss OMP/OMR or Eaton Char-Lynn H/S Series). We supply the matching spline coupling. The motor displacement should be selected based on your tractor’s hydraulic flow and desired winding speed.
3. Do you offer an auto-traverse (level wind) option?
Yes. For producing neat, dense bundles suitable for recycling, we offer an auxiliary PTO output on the gearbox to drive a Level Wind Lead Screw. This guides the tape back and forth across the spool, preventing tangles.
4. How do I remove the bundle?
Our gearboxes are designed for Tapered Collapsible Spools. Some models feature a hollow shaft that allows a hydraulic cylinder to push a plate, ejecting the bundle off the tapered shaft effortlessly.
Complete Your Retrieval System
Flow Control Valves
Manual valves to adjust winding speed from the tractor seat.
Clean Fields, Sustainable Future
Equip your retrieval machines with EVER-POWER Gearboxes for reliable end-of-season cleanup.
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