SIASUN Heavy Truck Assembly Line Mobile Robot

For decades the heavy truck assembly hall has been shaped by the drag chain: a fixed conveyor set into the floor that dictates where every station stands and how quickly every chassis moves past it. When a new model arrives, changing that line becomes a construction project rather than a production decision. The SIASUN Heavy Truck Assembly Line Mobile Robot takes the opposite approach. It places the chassis on a pair of synchronised mobile robots that carry the vehicle through assembly and take their instructions from the plant's manufacturing execution system rather than from a chain.

Robots Europa, based in Dublin, supplies the SIASUN Heavy Truck Assembly Line Mobile Robot to vehicle manufacturers and their integrators across the European Union and the DACH region. Robots Europa prepares the quotation, coordinates delivery to site and remains the point of contact for support once the line is running. Engineering teams in Germany, Austria, Switzerland and the wider EU therefore deal with one European partner from the first enquiry to commissioning.

Background

SIASUN and its move into heavy truck assembly

SIASUN is a robotics manufacturer whose range covers industrial robot arms, collaborative arms and a broad family of mobile robots for factory logistics and assembly. You can see this breadth in the SIASUN category. In 2018, SIASUN introduced heavy truck assembly line mobile robots. The aim was to bring the flexibility of mobile robotics to one of the most demanding environments in vehicle manufacturing: the chassis and final assembly line for heavy trucks, where the workpiece is large, heavy and slow-moving, and every station depends on the one before it.

Replacing the drag chain with dual-vehicle linkage

The central idea behind the system is dual-vehicle linkage. Instead of a single conveyor pulling the chassis forward, two mobile robots support the vehicle between them. Through information linkage, the two mobile robots run synchronously and increase or decrease their speed simultaneously, so the load travels as one unit. Using this technology, the robots replace traditional drag chains and assist in the assembly of truck chassis and complete vehicles, with a payload capacity of 10-20 tons. The line is no longer fixed into the floor. It becomes a set of machines whose movements are defined in software and coordinated with the rest of the plant.

Technical Specifications

Specifications are as published by the manufacturer and are confirmed against the datasheet at quotation.

The manufacturer has not published the dimensions, weight, travel speed, navigation method, battery capacity, positioning accuracy, gradeability, IP rating, safety certification for this model or package contents; these details are confirmed at quotation.

How does a pair of mobile robots replace a drag chain?

A drag chain works because it is rigid: every carrier is mechanically tied to the same chain, so everything moves at the same pace. The difficulty is that the same rigidity applies when the plant wants to change something. The SIASUN system keeps the discipline of a fixed line without the fixed hardware. The two robots that carry each vehicle are linked by information rather than by steel. They speed up and slow down together, which keeps the chassis stable as it travels between stations.

The spacing between the two robots is not a mechanical constant either. The assembly robot adjusts the distance between the two vehicles automatically, according to the production designation issued by the MES. When the next chassis on the schedule differs from the last, the robots can position themselves to suit it without manual reconfiguration. Because the system connects seamlessly with the MES, it can follow the production tasks of a variety of models. This matters most in mixed-model truck plants, where consecutive vehicles on the line are rarely identical.

The stop & go mode supports the assembly work directly. The mobile robot runs synchronously with the assembly mobile robot under the control of the control console, which makes it convenient for operators to carry out their tasks at each station. The vehicle therefore arrives, holds and moves on in a rhythm the workforce can rely on.

Why does the robot draw its power from the floor?

Heavy truck lines run at a high production pace, and a mobile robot that has to leave the line to recharge creates a gap in that pace. To keep up with the customer's site, SIASUN equips the robot with inductive power supply technology. An inductive cable laid under the ground supplies the power for the robot's operation, so no additional charging operations are needed. Planners therefore have no charging windows to schedule and no spare units to rotate in while others recharge, and operators have no charging routine to manage.

The frame design serves the same production logic. The whole mainline truck adopts a frame design, and its external dimension is optimised to the smallest. This minimises the robot's influence on the fitting work, keeps it clear of the fitting positions and greatly reduces how much of the assembly space it occupies on the customer's site. Assemblers keep their access to the chassis, and the hall keeps its floor space.

Who is the SIASUN Heavy Truck Assembly Line Mobile Robot for?

The primary buyers are heavy truck and commercial vehicle manufacturers planning a new chassis or final assembly line, or reconsidering one built around a drag chain. For these plants the system answers a specific question: how to carry a heavy chassis through assembly while keeping the freedom to change the model mix. Production engineers responsible for mixed-model scheduling will value the MES-driven spacing, because the line adapts to the schedule rather than the reverse.

System integrators and automation consultants who design assembly halls for vehicle producers form a second group. They need a carrier that connects to the plant's execution layer and works with the station layout instead of dominating it, and the compact frame design and inductive power supply suit that brief. A third group is plant management planning a line conversion in stages. Because the robots replace the chain function rather than the stations themselves, the move to mobile assembly can be phased.

Buyers whose task is lighter or different in kind, such as cleaning, palletising or general factory logistics, can compare the wider SIASUN range with Robots Europa before requesting a quotation.

What is the SIASUN Heavy Truck Assembly Line Mobile Robot used for?

1. Chassis assembly: carrying heavy truck chassis between assembly stations in place of a traditional drag chain.
2. Complete vehicle assembly: supporting the vehicle through the later stages of assembly up to the finished truck.
3. Mixed-model production: adjusting the spacing between the two robots to the MES production designation for each model.
4. Stop & go stations: holding the vehicle in place at each workstation so operators can complete their fitting tasks.
5. Continuous high-pace operation: running on inductive power from the floor, with no charging stops interrupting the line.
6. Line conversion projects: replacing fixed conveyor hardware with software-controlled carriers in an existing or new assembly hall.

Pricing and Availability

Every heavy truck assembly line differs in layout, model mix and MES environment, so Robots Europa supplies the SIASUN Heavy Truck Assembly Line Mobile Robot on the basis of a project-specific quotation. Please describe your line, the vehicles you build and the systems the robots must connect to, and we will prepare an offer. Delivery, customs and support are arranged with the quotation. The request form for a tailored offer is available on this page.

Frequently Asked Questions

What payload does the SIASUN Heavy Truck Assembly Line Mobile Robot carry?

The system assists in the assembly of truck chassis and complete vehicles with a payload capacity of 10-20 tons.

How do the two robots stay coordinated?

Through information linkage, the two mobile robots run synchronously and increase or decrease their speed simultaneously, so the vehicle they carry moves as a single unit.

Does the robot connect to our MES?

Yes. The system connects seamlessly with the manufacturing execution system, and the assembly robot adjusts the distance between the two vehicles according to the production designation the MES issues.

Does the robot need to be recharged during production?

No additional charging operations are needed. The robot receives its operating power through a non-contact inductive supply from a cable laid under the ground.

How does the robot behave at an assembly station?

It works in stop & go mode and runs synchronously with the assembly mobile robot under the control of the control console, which is convenient for operators carrying out the assembly work.

Will the robot get in the way of the assemblers?

The whole mainline truck adopts a frame design with its external dimension optimised to the smallest. This minimises the influence on the fitting work, avoids blocking the fitting positions and greatly reduces the assembly space it occupies.

Where can I buy the SIASUN Heavy Truck Assembly Line Mobile Robot and what does it cost?

Robots Europa supplies the robot across the EU and the DACH region. Because each line is configured individually, the cost is set out in a project quotation, which you can request on this page.

Summary

The drag chain gave heavy truck assembly its rhythm, but it also fixed that rhythm into the floor. The SIASUN Heavy Truck Assembly Line Mobile Robot keeps the rhythm and removes the fixed hardware. Two linked robots carry loads of 10-20 tons, set their spacing from the MES, hold each vehicle in stop & go mode and draw their power from a cable beneath the floor. The result is an assembly line that changes with the production plan and leaves the assembly space free for the people who build the trucks. For manufacturers in the EU and the DACH region considering that change with Robots Europa, this page is the starting point.