In modern automated factories and smart distribution hubs, traditional cargo elevators present severe bottlenecks for Automated Guided Vehicles (AGVs) and Autonomous Mobile Robots (AMRs). Standard warehouse lifts lack the communication interfaces and leveling precision required for unmanned operations. When an AGV experiences landing misalignments, slow door cycles, or floor sagging, it triggers emergency stops, fleet idle times, and costly system reboots.
The Gradin AGV-Integrated Hydraulic Goods Lift (SJD2.0-3.0 series) resolves these challenges by creating a continuous physical and digital bridge between horizontal robotic pathways and vertical mezzanine floors. Configured with a robust 2,000 kg load capacity and a 3,500 mm vertical lift range, this cargo lift features a fully enclosed carbon steel checkered-plate cabin. It integrates floor-interlocked rapid hard rolling shutter doors and an advanced electronic anti-drop active leveling system to ensure safe, millimeter-level threshold alignment. Engineered in compliance with international industrial truck standards, including ISO 3691-1 safety requirements, this heavy-duty hydraulic goods lift comes pre-wired with PLC handshake interfaces to integrate seamlessly with your existing WCS/WMS fleet managers.
The technical parameters below represent a recently deployed system configured for automatic factory logistics. All structural designs and dimensions are fully customizable by Gradin to fit your exact building layout and automated vehicle specifications.
| Parameter | Specification Value | Customization Options |
| Model Code | SJD2.0-3.0 | Tailored based on capacity and vertical travel |
| Rated Load Capacity | 2,000 kg | Custom-built from 500 kg to 10,000 kg |
| Lifting Travel Height | 3,500 mm | Up to 18,000 mm vertical span |
| Stops & Stations | 2 Stops / 2 Stations (2停2站) | Multi-stop configurations available |
| Cabin Size (WDH) | 1,800 mm * 2,000 mm * 2,200 mm | Scaled to match your AGV dimension footprint |
| Main Guide Rail | 125H National Standard I-Beam | Heavy H-beams selected for off-center load limits |
| Active Leveling Precision | Within ±2 mm | Laser-guided dynamic real-time alignment |
| Rapid Rolling Doors | Width 2,000 mm * Height 2,200 mm | Aluminum hard shutter, absolute encoder |
| Hydraulic Pump Power | 3.0 kW | High-duty continuous power packs |
| Lift Cylinder Specs | 70-50 * 2 pieces | Fitted with anti-burst safety valves |
| Suspension Chain | 1244 Leaf Chain * 4 pieces | Heavy industrial tensile rated |
| Leveling Wire Rope | 12# Diagonal Dual Leveling | Redundant leveling tensioners |
| Pit Depth Required | 400 mm | Ramp-accessed pitless designs available |
| Platform Frame | 120 * 60 * 4 mm rectangular tube | Reinforced structure to prevent fatigue |
| Cabin Material | 4mm Carbon Steel Checkered Plate | Stainless steel (SUS304) options |
| Control System | Siemens S7-1200 PLC | Seamless TCP/IP, Profinet API integration |
Dual-Cylinder 4-Pillar Double-Speed Lifting Mast (SJD2.0-3.0)
Operational Challenge : Heavy AGV wheel loads concentrate intense dynamic forces on the entry threshold during roll-on, causing standard single-cylinder lifts to twist, distorting guide rails over time.
Gradin Custom Design : A highly rigid dual-cylinder 4-pillar double-speed structure utilizing 125H national-standard structural steel guide rails. This structural configuration distributes heavy eccentric dynamic moments evenly, preventing platform tilting or rail warping during high-frequency robotic entry.
Millimeter-Level Active Anti-Drop Leveling System
Operational Challenge : Under a 2,000 kg load, hydraulic cylinder fluid compression causes the lift platform to sag (sink) by several millimeters as the AGV rolls on, causing the robot to slip or tip on the resulting step.
Gradin Custom Design : Integration of an electronic active anti-drop leveling system using laser positioning sensors and an automatic micro-injection hydraulic valve block. The system detects and corrects platform displacement in real time, maintaining a flush alignment within ±2mm of tolerance during AGV transitions.
Pre-Configured Siemens PLC AGV Communication Interface
Operational Challenge: Hardwiring elevators to third-party AGV dispatching systems often results in signal lag, software incompatibility, or doors closing prematurely on moving robots.
Gradin Custom Design : Outfitted with an on-board Siemens S7-1200 PLC controller featuring pre-programmed Ethernet (Profinet/Modbus TCP) protocols and dry contacts, allowing a secure digital handshake to coordinate door open, cart lock, transit, and cart release commands.
Fully Enclosed 3-Sided Carbon Steel Checkered Plate Cabin
Operational Challenge : Unsecured pallets or shifting loads carried by autonomous robots can fall off during transit, impacting shaft walls and causing catastrophic guide rail jams.
Gradin Custom Design : A robust fully enclosed cabin (W1800 x D2000 x H2200 mm) constructed entirely of 4mm carbon steel checkered plates with an integrated structural ceiling, providing durable containment that withstands structural impacts from AGVs.
High-Speed Floor-Interlocked Rapid Hard Rolling Shutter Doors
Operational Challenge : Standard manual sliding gates or sluggish rolling doors create long wait times for AGVs, rapidly draining robot batteries and lowering overall warehouse throughput.
Gradin Custom Design : Equipped with dual rapid hard rolling shutter doors (2000 x 2200 mm). These doors feature absolute encoders for high-speed operation and are electronically interlocked via the central PLC, ensuring doors cannot open unless the lift is mechanically locked at the station.
Dual-Leveling 12# Wire Ropes & Heavy 1244 Leaf Chains
Operational Challenge : Extreme cycle frequencies cause dynamic chain elongation, shifting cargo alignment and leading to platform unevenness over months of use.
Gradin Custom Design : The suspension uses four heavy-duty 1244 leaf chains paired with 12# diagonal dual-leveling steel wire ropes, providing highly redundant tensile strength and maintaining continuous mechanical horizontal equilibrium.
Slab Opening Installation with 400mm Shallow Pit
Operational Challenge : Deep concrete pit excavation is often impossible due to underground utility pipelines, high water tables, or landlord structural drilling restrictions.
Gradin Custom Design : Optimized for a shallow 400mm pit installation through existing concrete slabs, minimizing structural modifications while ensuring the lift platform sits flush with the factory floor.
3KW High-Duty Hydraulic Pump Station with 18mm Steel-Braid Piping
Operational Challenge : High-frequency continuous automation runs heat up hydraulic oil quickly, lowering fluid viscosity and causing platform drift or seal degradation.
Gradin Custom Design : Features a high-efficiency 3KW hydraulic power unit paired with 18mm double-braid high-pressure steel hoses, including integrated thermal overload sensors and pressure release valves for continuous, safe operation.
Multi-Level Automated Electronics Assembly
In high-precision electronics manufacturing facilities where automated mobile robots (AMRs) transport delicate PCB components and sensitive semi-finished materials between floor levels. The AGV-Integrated Hydraulic Goods Lift utilizes its active leveling valve block to eliminate standard threshold jolting, ensuring smooth transition profiles that prevent damage to fragile solder connections.
Automotive Battery Module Assembly Lines
Transporting heavy lithium-ion battery packs and casing fixtures on pallet AGVs. The lift’s double-speed 4-pillar structural frame comfortably withstands heavy eccentric forces as the 2,000 kg robotic payload rolls into the cabin, enabling seamless vertical feeding to high-level storage buffers.
E-Commerce Fulfillment Centers
Linking picking areas to multi-tier mezzanine consolidation zones. Automated guided carts drop off tote bins onto the motorized roller platforms, and the lift transfers the load vertically using high-speed hard rolling doors to open/close within 3 seconds, keeping fleet wait times near zero.
Chemical & Pharmaceutical Manufacturing
Moving sensitive material containers within controlled-atmosphere factory levels. Handshake logic between the lift’s Siemens PLC and the AGV system prevents door operations when cleanroom pressure seals are active, maintaining strict environmental zoning while allowing automated vertical transit.
Advanced Machinery Spare Parts Distribution
Handling mixed pallets on heavy-duty tugger AGVs. The 4mm thick checkered carbon steel cabin absorbs accidental metal-on-metal bumps from the forklift or robot chassis, protecting the building’s structural frame while allowing unmanned vertical dispatch.
For this heavy-duty series, we can engineer load capacities up to [300] tons, with platform dimensions and lifting heights customized to your operational envelope. Requirements exceeding our standard engineering matrix will undergo a Finite Element Analysis (FEA) by our engineering team to ensure structural viability before proposing a solution.
To initiate the engineering proposal, please provide the following baseline data:
Rated Load Capacity
Maximum Lifting Height & Closed Height
Platform Dimensions (L x W)
Duty Cycle (e.g., operational cycles per hour/day)
Environmental Conditions (e.g., indoor/outdoor, washdown, explosion-proof)
Pit depth or overhead clearance constraints
Yes. The control systems can be equipped with standard communication protocols (e.g., Profinet, Modbus, Ethernet/IP) utilizing [Siemens / Allen-Bradley / Omron] PLCs. This ensures seamless I/O signal synchronization with upstream/downstream conveyors, AGV/AMR units, and your central control room.
Every custom unit undergoes a mandatory Factory Acceptance Test (FAT) prior to dispatch. This includes continuous operational testing at 100% rated load, static overload testing at [120% / 125%] capacity, and the physical triggering of all mechanical anti-fall and hydraulic safety interlocks. FAT documentation and video proof are included in your engineering package.
Upon final approval of the General Arrangement (GA) drawings, the manufacturing lead time is typically 4 to 8 weeks. Oversized structural components are engineered with a modular design to fit into standard shipping containers (20FT/40HQ). On-site assembly utilizes pre-engineered bolted flange connections and heavy-duty aviation plugs, strictly eliminating the need for field welding.
We provide a standard [12/24]-month warranty covering the structural frame and primary hydraulic/electrical components. To minimize operational downtime, a comprehensive set of standard consumables (e.g., cylinder seal kits, travel switches, relays) is shipped alongside your equipment. During the warranty period, replacement parts for non-human-induced failures are dispatched via priority air freight (DHL/FedEx) within 48 hours.
Beyond the warranty, we guarantee lifetime engineering support. Your custom equipment's CAD drawings, electrical schematics, and BOM (Bill of Materials) are permanently archived in our system. This ensures you receive uninterrupted remote troubleshooting, maintenance guidance, and exact spare parts matching for the entire lifecycle of the equipment.
Gradin Machinery is a leading manufacturer specializing in aerial work platforms and hydraulic lifting solutions. With ISO & CE certifications, we provide safe, reliable, and customized equipment for global industrial needs
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