For operation teams that still prefer the mechanical link structure of semi-automatic spreaders yet wish to eliminate the slow cable pulling operation, the Motor Drive Container Spreader is engineered precisely for this purpose. This spreader is modified from the semi-automatic rope-latching spreader, with the most significant upgrade made to the reversing plate of the linkage mechanism. The original semi-automatic cable pulling assembly has been replaced by an electric linear actuator.

The electric linear actuator is connected to the linkage mechanism via a tilting plate. A control cabinet is installed inside the crane operator's cabin, with cables running between the cabinet and the electric actuator. The operator controls the actuator stroke from within the cabin. As the actuator extends or retracts, the tilting plate drives the linkage mechanism, which in turn locks or unlocks the twistlocks. This is the working principle.

Technical Specifications

What makes this Motor Drive Container Spreader different?

Standard semi-automatic container spreaders use cable pull structures at the reversing plate to perform movements. While functional, this slows down the working cycle. On this Motor Drive Container Spreader, an electric linear actuator is fitted at the reversing plate. The actuator does not lift the container; it only drives the twistlock unlocking and locking operations.

The connection setup is simple and straightforward:

• Electric linear actuator mounted on the reversing plate of the linkage mechanism
• Flip plate between the electric linear actuator and the linkage mechanism
• Control cabinet located inside the crane operator cabin
• Cables running from the control cabinet to the electric linear actuator
• Extension and retraction of the actuator controls twistlock unlocking and locking.

No hydraulic power unit is required, nor is a complex fully automatic control system. It simply applies electric linear actuator control to the proven linkage design.

How to operate the motor drive container spreader from the crane control cabin?

The operator remains inside the crane control cabin, with the control cabinet within easy reach. Cables run from the control cabinet to an electric actuator mounted on the spreader. When the operator extends the actuator, the linkage moves the twistlocks to the locked position; retracting the actuator unlocks the twistlocks.

It sounds simple - and it is meant to be simple. The critical factor is position control. Since the operator controls the electric actuator from within the control cabin, waiting time between two lifts is reduced.

Why does it improve handling efficiency?

The existing semi-automatic spreader already features a robust mechanical foundation. This Motor Drive Container Spreader retains that foundation while upgrading the control points. The result is a spreader familiar to operators, yet with faster actuation.

Key advantages include:

• Faster twistlock locking and unlocking operations from within the crane cabin
• Stable push rod stroke with consistent repeatability for locking and unlocking
• Retains the proven linkage design; only the driving method is modified
• Easy for maintenance crews to comprehend: control cabinet, cables, electric push rods, flippers and linkages

For ports, terminals, rail yards and warehouses handling containers daily, the time saved per lift accumulates significantly. The modifications are minor but implemented at critical positions.

Main Features

• Based on semi-automatic spreader with sling
• Electric push rod replaces the semi-automatic cable pulling structure
• The push rod is mounted at the reversing plate of the linkage mechanism
• The push rod and linkage mechanism are connected via a turnover plate
• A control cabinet in the operator's cabin is provided for operator control
• Cables connect the control cabinet to the electric push rod
• The extension and retraction of the push rod realize twistlock locking and unlocking
• Suitable for standard container sizes; custom spreader design available

Suitable for practical terminal operations

If you desire faster twistlock control without investing in a fully automatic spreader, this electric linear actuator container spreader offers a practical solution. It is ideal for operations aiming to improve cycle time, cut procurement and maintenance costs, while retaining the mechanical linkages familiar to your maintenance team.

This is a worthy upgrade if your crane is still fitted with semi-automatic sling-type spreaders. It keeps what works well and only modifies the components that slow down your operations.

Order & Customization

Please advise the crane type, container dimensions, existing spreader model and control voltage. We can recommend a suitable Motor Drive Container Spreader for your working conditions, or discuss an upgrade solution based on your current semi-automatic spreader.

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